<?xml version="1.0" encoding="UTF-8" ?>
<rdf:RDF xmlns:admin="http://webns.net/mvcb/" xmlns="http://purl.org/rss/1.0/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:prism="http://purl.org/rss/1.0/modules/prism/" xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:syn="http://purl.org/rss/1.0/modules/syndication/">
<channel rdf:about="https://biorxiv.org">
<admin:errorReportsTo rdf:resource="mailto:biorxiv@cshlpress.edu"/>
<title>bioRxiv Subject Collection: Pharmacology And Toxicology</title>
<link>https://biorxiv.org</link>
<description>
This feed contains articles for bioRxiv Subject Collection "Pharmacology And Toxicology"
</description>

<items>
<rdf:Seq>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.15.751815v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.16.752149v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.15.751754v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.14.751502v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.14.751622v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.13.751308v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.15.751712v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.13.751249v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.12.750977v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.14.751462v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.11.750985v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.10.750749v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.11.749290v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.11.750627v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.10.750598v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.08.750282v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.07.749896v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.07.749885v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.08.748791v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.06.749750v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.05.749594v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.04.749478v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.07.749921v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.08.750008v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.04.748642v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.03.748870v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.02.747152v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.02.746116v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.08.750057v1?rss=1"/>
<rdf:li rdf:resource="https://www.biorxiv.org/content/10.64898/2026.09.01.748647v1?rss=1"/>
</rdf:Seq>
</items>
<prism:eIssn/>
<prism:publicationName>bioRxiv</prism:publicationName>
<prism:issn/>

<image rdf:resource=""/>
</channel>
<image rdf:about="">
<title>bioRxiv</title>
<url>https://www.biorxiv.org/sites/default/files/bioRxiv_article.jpg</url>
<link>https://www.biorxiv.org</link>
</image>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.15.751815v1?rss=1">
<title>
<![CDATA[
Identification of co-expressed gene sets for major molecular initiating events in rodent liver carcinogenesis using wild type and knock out rats 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.15.751815v1?rss=1
</link>
<description><![CDATA[
Liver tumors are the most common carcinogenic outcome observed in two-year bioassays used for regulatory risk assessment of chemicals and pharmaceuticals. Because these traditional long-term studies are resource-intensive and not feasible for most chemicals, there is a critical need to develop alternative approaches that can identify potential rodent liver carcinogens in short-term studies (e.g., [&le;] 1 month). Biomarkers associated with molecular initiating events (MIEs) of early rodent liver tumorigenesis may enable the prediction of two-year outcomes from such studies. Here, we identified transcriptional changes associated with six key initiators of rat liver tumorigenesis: five transcription factors (TFs) associated with non-genotoxic modes of action (AhR, PXR, CAR, PPAR, and ER), and tumor suppressor protein p53, which is activated by diverse cellular stressors including genotoxicity. Three known chemical activators for each TF were administered orally once daily for five days at doses associated with tumorigenic responses in previous rat cancer bioassays. RNA-seq identified differentially expressed genes (DEGs) that were consistently regulated by at least two activators in wild-type but not in corresponding TF knockout animals. Gene set enrichment analysis of ranked differential expression results demonstrated enrichment of pathways reflecting established TF biology. When comparing the consensus DEGs for each TF to a library of chemically induced, liver-specific gene expression profiles, we found that in most cases the chemicals with the most similar profiles to the consensus lists were known to activate the corresponding TF. Collectively, these findings identified candidate gene sets that may have utility for monitoring the induction of carcinogenesis-associated MIEs in short-term studies.
]]></description>
<dc:creator><![CDATA[ Venneman, K. K., Kotulkar, M., Paine-Cabrera, D., Liu, J., Mitchell, C. A., Tannis, K. Q., Corton, J. C., Apte, U. ]]></dc:creator>
<dc:date>2026-09-21</dc:date>
<dc:identifier>doi:10.64898/2026.09.15.751815</dc:identifier>
<dc:title><![CDATA[Identification of co-expressed gene sets for major molecular initiating events in rodent liver carcinogenesis using wild type and knock out rats]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-21</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.16.752149v1?rss=1">
<title>
<![CDATA[
High-throughput phenotypic profiling of insecticide responses in mosquito larvae 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.16.752149v1?rss=1
</link>
<description><![CDATA[
Extensive use of insecticides is increasing resistance risks that could severely reduce the control of mosquito vectors that transmit infectious agents of Neglected Tropical Diseases. Addressing resistance threats by discovering new insecticides can be challenging because of the limited throughput and translatability of existing in vitro screening pipelines. Acquiring multiple phenotypic endpoints of larvae could alleviate these restrictions by more thoroughly profiling drug effects on whole organisms, providing leads to compounds with novel mechanisms of action, and increasing screening throughput compared to adult-stage assays. Here, we establish a pair of assays for profiling motility and development traits in larval-stage mosquitoes at a higher scale than standard larvicidal screening techniques. We optimized assay parameters and developed novel image processing approaches that enable relatively high throughput screening of chemical compounds on single larvae within a screen with condition replicates. We tested the assay with an insect growth regulator (S-methoprene), a slow-acting pyrrole (chlorfenapyr), and two microbial larvicides (Spinosad and Lysinibacillus sphaericus). These measurements aligned well with known insecticide mechanisms, and dose response curves established assay baselines for comparison in future screens. Finally, we present ways in which the assay design can be modified across different imaging technologies, showing the flexibility of the screening approach.
]]></description>
<dc:creator><![CDATA[ Ryan, K. T., Vaccaro, K., Nunn, L. R., Bartholomay, L. C., Zamanian, M. ]]></dc:creator>
<dc:date>2026-09-21</dc:date>
<dc:identifier>doi:10.64898/2026.09.16.752149</dc:identifier>
<dc:title><![CDATA[High-throughput phenotypic profiling of insecticide responses in mosquito larvae]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-21</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.15.751754v1?rss=1">
<title>
<![CDATA[
EFFECTS OF SUBCHRONIC EXPOSURE TO POLYSTYRENE NANOPLASTICS ON THE MOUSE INTESTINE 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.15.751754v1?rss=1
</link>
<description><![CDATA[
Nanoplastics (NPs) are being used increasingly in cosmetics, personal care products, foods, automotive products, and cleaning products, as well as being by-products of some industrial processes. The aim of this study was to examine the effects of a sub-chronic exposure of NPs on various biological systems, using mice as a model. Adult male mice were administered 500 nm polystyrene (PS) NPs at 0.15 mg/day and 1.5 mg/day, to mimic subchronic exposure to NPs. Control mice were gavaged in the same manner but with sterile water instead of NPs. The mice were weighed weekly and treated daily for 60 days. The mice were then euthanized, and multiple tissues were retrieved and fixed or frozen for subsequent analyses. The intestines were rinsed and divided into pieces of the three regions: duodenum, jejunum, and ileum. Hematoxylin and eosin (H&E) staining was performed to evaluate histopathology, and RNA-Seq was conducted on tissues from all three regions. H&E staining revealed few effects on the duodenum, but increasingly pronounced disruption and epithelial alterations in the jejunum and ileum, respectively. RNA-Seq analysis of controls compared to the high-dose (HD; 1.5 mg/day) group supported these observations. The number of differentially expressed genes (DEGs) was low (19) in the duodenum, higher in the jejunum (114 DEGs), and significantly greater in the ileum (4982 DEGs). Genes associated with immune response, ion transport, and junctional proteins were among the groups of genes most differentially expressed. These results demonstrate the potentially harmful effects of PS NPs on the intestinal system of mice.
]]></description>
<dc:creator><![CDATA[ Gregory, M., Dufresne, J., Da Cunha de Medeiros, P., Yim, S., Moinard, P., Gagne, F., Cyr, D. ]]></dc:creator>
<dc:date>2026-09-21</dc:date>
<dc:identifier>doi:10.64898/2026.09.15.751754</dc:identifier>
<dc:title><![CDATA[EFFECTS OF SUBCHRONIC EXPOSURE TO POLYSTYRENE NANOPLASTICS ON THE MOUSE INTESTINE]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-21</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.14.751502v1?rss=1">
<title>
<![CDATA[
A non-retinoid triazolopyrimidine RBP4 antagonist for the treatment of Stargardt disease 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.14.751502v1?rss=1
</link>
<description><![CDATA[
Stargardt disease is a juvenile-onset retinal dystrophy characterized by the buildup of cytotoxic lipofuscin deposits in the retinal pigment epithelium (RPE), leading to photoreceptor degeneration and eventual blindness. Currently, there are no FDA-approved treatments for Stargardt disease. Bisretinoids, byproducts of the visual cycle, are the major cytotoxic components of the lipofuscin deposits, and bisretinoid synthesis relies on the traffic of retinol from the bloodstream to the retina. Selective targeting of the key retinol transporter, Retinol-Binding Protein 4 (RBP4), offers an appealing strategy for halting the buildup of lipofuscin in the RPE and arresting the progression of Stargardt disease. Retinol delivery depends on RBP4 interaction with another serum protein, Transthyretin (TTR). We previously reported several libraries of RBP4 antagonists that effectively blocked the association of the TTR-RBP4-retinol tertiary complex, thereby lowering the overall retinol load in the retina; however, some chemotypes displayed off-target activity that warranted further optimization. Here, we report the pharmacological characterization of AKR-XI-85 and its analogs as promising non-retinoid small-molecule RBP4 antagonists. AKR-XI-85 displayed excellent in vitro and in vivo efficacy and desirable pharmacokinetic properties without any limiting off-target activity. In Abca4-/- mice, chronic dosing of the compound induced a prolonged reduction in serum RBP4 levels and achieved a dramatic, 70 % reduction in the accumulation of A2E, a critical component of toxic lipofuscin. As such, AKR-XI-85 may be an attractive drug candidate for the treatment of Stargardt disease and other lipofuscin-dependent retinopathies.
]]></description>
<dc:creator><![CDATA[ Rinderspacher, K. A., Varadi, A., Racz, B., Wasmuth, A. S., Deng, S.-X., Weber, P., Landry, D. W., Bernstein, P. R., Petrukhin, K. ]]></dc:creator>
<dc:date>2026-09-21</dc:date>
<dc:identifier>doi:10.64898/2026.09.14.751502</dc:identifier>
<dc:title><![CDATA[A non-retinoid triazolopyrimidine RBP4 antagonist for the treatment of Stargardt disease]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-21</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.14.751622v1?rss=1">
<title>
<![CDATA[
ACAN regulates VSMC mitochondrial homeostasis through the YAP1/TAZ pathway and contributes to the onset and progression of aortic dissection 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.14.751622v1?rss=1
</link>
<description><![CDATA[
Objective: Aortic dissection (AD) is a serious, life-threatening cardiovascular crisis. While vascular proteoglycans normally buffer hemodynamic stress, their aberrant accumulation in the AD aorta predisposes to rupture. Aggrecan (ACAN) is among the most frequently elevated proteoglycans in this setting, yet its pathogenic relationship to AD remains undefined. This study aimed to investigate the role of ACAN in AD and identify potential therapeutic targets. Approach and Results: We employed human tissues, animal models, and cell cultures. Western blotting and immunohistochemistry (IHC) were performed on aortic samples from AD patients and controls to assess contractile markers, MMPs, ACAN, and SOX9. In vivo, AD was induced in mice using {beta}-aminoisobutyric acid (BAPN) and Ang II, with AAV-mediated ACAN knockdown in VSMCs. Histological staining confirmed model validity and enabled assessment of AD incidence, mortality, and protein expression changes. In vitro, human aortic vascular smooth muscle cells (HAVSMCs) were stimulated with Ang II, and SOX9 and ACAN were silenced via siRNA to evaluate the functional impact of ACAN downregulation. In human AD aortas, elevated ACAN and its upstream transcription factor SOX9 drove VSMC phenotypic switching and ECM degradation. In mice, ACAN knockdown corrected AD-induced medial structural disruption, elastin fragmentation, and collagen deposition, markedly reducing incidence and mortality while curbing excessive mitochondrial fission and rescuing functional integrity. ACAN silencing attenuated Ang II-induced mitochondrial damage in HAVSMCs via the RNA-seq-identified YAP1/TAZ pathway, and Verteporfin restored homeostasis. Conclusion: ACAN is aberrantly expressed in AD and murine aortas. ACAN downregulation delays disease progression by preserving mitochondrial homeostasis and function via the YAP1/TAZ pathway.
]]></description>
<dc:creator><![CDATA[ Fu, W., Gao, Y., Fang, Y., Guo, L., Huang, Y., Hong, L., Lu, B., Li, Z., Yan, L., Hu, B., Wang, C., Zhong, L., Chen, M., Li, Y. ]]></dc:creator>
<dc:date>2026-09-21</dc:date>
<dc:identifier>doi:10.64898/2026.09.14.751622</dc:identifier>
<dc:title><![CDATA[ACAN regulates VSMC mitochondrial homeostasis through the YAP1/TAZ pathway and contributes to the onset and progression of aortic dissection]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-21</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.13.751308v1?rss=1">
<title>
<![CDATA[
Hepatic Xanthine Oxidoreductase Sustains Antithrombotic Nitric Oxide Signalling Through the Nitrate-Nitrite-Nitric Oxide Pathway 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.13.751308v1?rss=1
</link>
<description><![CDATA[
Background: Tonic endothelium-derived nitric oxide (NO) suppresses platelet activation physiologically, and its loss underlies the thrombotic risk of endothelial dysfunction. Inorganic nitrate and nitrite provide an alternative NO source, and xanthine oxidoreductase (XOR) is a candidate nitrite reductase, but whether endogenous XOR sustains platelet NO signalling in vivo, and its source is unknown. Methods: Dietary nitrate (15 mmol/L KNO3) was given to eNOS-/- and ApoE-/- mice. XOR was interrogated pharmacologically (allopurinol) and genetically (global Xdh+/- and hepatocyte-specific XOR knockout, HXOR KO). Haemostasis and thrombosis were assessed by tail bleeding and intravital microscopy imaging of FeCl3-induced mesenteric arterial thrombosis, alongside aggregometry, flow cytometry, platelet VASPSer239 phosphorylation, cGMP and ozone chemiluminescence-based analysis of nitrate and nitrite. Results: Dietary nitrate raised plasma nitrate and nitrite levels in all genotypes. In eNOS-/- and ApoE-/- mice, it prolonged bleeding time and normalised thrombus burden. In ApoE-/- mice nitrate treatment improved vasorelaxation, without altering XOR or eNOS expression. Allopurinol suppressed nitrite reductase activity in liver and plasma but not aorta, elevated plasma nitrite, shortened bleeding time and reduced platelet P-VASPSer239 expression. Xdh+/- mice were spontaneously prothrombotic, showed reduced P-VASPSer239 and exaggerated calcium mobilisation, and were refractory to dietary nitrate treatment despite equivalent nitrite elevation. XOR was undetectable in platelets. HXOR KO mice phenocopied global deficiency, with blunted nitrite-induced vasorelaxation but preserved acetylcholine and spermine-NO responses, reduced P-VASPSer239, enhanced aggregation and shortened bleeding time. Conclusions: Hepatic XOR sustains platelet NO-cGMP signalling and thromboresistance through an inter-organ, endocrine-like axis. Dietary nitrate restores antithrombotic protection when endothelial NO generation fails, whereas XOR inhibition removes physiological tonic antithrombotic signal.
]]></description>
<dc:creator><![CDATA[ Ahluwalia, A., Parakaw, T., Perez-Ternero, C., Filomena, F., Dyson, N., Allan, H. E., Cufaj, N., Massimo, G., Curtis, M., Khambata, R. S. ]]></dc:creator>
<dc:date>2026-09-19</dc:date>
<dc:identifier>doi:10.64898/2026.09.13.751308</dc:identifier>
<dc:title><![CDATA[Hepatic Xanthine Oxidoreductase Sustains Antithrombotic Nitric Oxide Signalling Through the Nitrate-Nitrite-Nitric Oxide Pathway]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-19</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.15.751712v1?rss=1">
<title>
<![CDATA[
The COVID-19 RNA vaccine SpikevaxTM transfects human umbilical endothelial cells and induces Spike protein production, inflammation and leukocyte adhesion 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.15.751712v1?rss=1
</link>
<description><![CDATA[
Endothelial cell dysfunction plays a key role in the pathogenesis of severe and critical COVID-19, leading to a multi-systemic inflammatory disease, and results from the direct interaction of the SARS-CoV-2 Spike proteins with endothelial cells. COVID-19 RNA vaccines encode a recombinant SARS-CoV-2 Spike protein which undergoes systemic biodistribution. No information is however so far available on the direct effects of COVID-19 RNA vaccines on human endothelial cells. In the present study, we exposed cultured human umbilical venous endothelial cells (HUVEC) to the COVID-19 RNA vaccine SpikevaxTM (Moderna, Inc.), and thereafter we measured the expression of the Spike protein, of the proinflammatory cytokines interleukin (IL)-6 and tumor necrosis factor (TNF)-, of the adhesion molecules intercellular adhesion molecule 1 (ICAM-1) and vascular cell adhesion molecule 1 (VCAM-1), as well as the attachment of human leukocytes to HUVEC layers. We also assessed the effects of SpikevaxTM on HUVEC viability. Exposure of HUVEC to the COVID-19 RNA vaccine SpikevaxTM resulted in effective cell transfection, and subsequent production of the Spike protein, which was expressed in the cells and secreted in the culture medium. Spike protein production was accompanied by increased gene expression of IL-6 and TNF- and of ICAM-1 and VCAM-1, as well as by increased attachment of leukocytes to HUVEC monolayers. Exposure to the COVID-19 RNA vaccine SpikevaxTM did not affect HUVEC viability. Our results provide a mechanistic explanation to post-COVID-19 RNA vaccination pathologies resulting from endothelial dysfunction, such as during atherosclerosis, autoimmune inflammation, and systemic inflammatory conditions.
]]></description>
<dc:creator><![CDATA[ Cosentino, M., Ferrari, M., Schiavone, N., Rasini, E., Luini, A., Legnaro, M., Federico, M., Marino, F., Frajese, G. ]]></dc:creator>
<dc:date>2026-09-18</dc:date>
<dc:identifier>doi:10.64898/2026.09.15.751712</dc:identifier>
<dc:title><![CDATA[The COVID-19 RNA vaccine SpikevaxTM transfects human umbilical endothelial cells and induces Spike protein production, inflammation and leukocyte adhesion]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-18</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.13.751249v1?rss=1">
<title>
<![CDATA[
Cinnamaldehyde interacts with the local anesthetic pocket of the NaV 1.5 channel 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.13.751249v1?rss=1
</link>
<description><![CDATA[
Cinnamaldehyde (CA) is extensively used as flavorant and in traditional medicine. CA is com-monly used in pain research as specific agonist of TRPA1, a polymodal cation channel expressed in nociceptive primary sensory neurons. However, we previously showed that CA inhibits the L-type Ca2+ channel in cardiac and smooth muscle cells, raising the possibility that other ion channels can be modulated by this compound as well. Here, we investigated whether CA exhibits affects the activity on the cardiac NaV1.5 channel. We used the whole-cell patch-clamp technique to record Na+ currents in HEK293T cells expressing the human NaV1.5 channel, as well as in cells expressing hNaV1.5 channels baring mutation in the binding pocket of local anesthetics (LA). Our results show that CA exhibit LA-like actions on hNaV1.5 channels: CA blocks hNaV1.5 currents in a tonic and voltage-dependent fashion. Residues F1760 and Y1767 are important for the blockade of NaV1.5 by CA and a double point mutation F1760A/Y1767A abolishes the blockade of INa by CA. We conclude that CA and LID share common structural determinants for the inhibition of Na+ channels and that CA has LA-like actions.
]]></description>
<dc:creator><![CDATA[ Alvarez-Collazo, J., Lopez-Requena, A., Talavera, A., Alvarez, J. L., Talavera, K. ]]></dc:creator>
<dc:date>2026-09-18</dc:date>
<dc:identifier>doi:10.64898/2026.09.13.751249</dc:identifier>
<dc:title><![CDATA[Cinnamaldehyde interacts with the local anesthetic pocket of the NaV 1.5 channel]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-18</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.12.750977v1?rss=1">
<title>
<![CDATA[
Exposure to a mixture of long-chain PFAS disrupts ovarian follicle development, ovulation, and luteinization in female mice 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.12.750977v1?rss=1
</link>
<description><![CDATA[
Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants associated with adverse female reproductive outcomes. However, most prior studies examined individual PFAS, despite that humans are exposed to complex PFAS mixtures. Here, we investigated the ovarian effects of a mixture of five commonly detected long-chain PFAS, including PFOS, PFOA, PFNA, PFDA, and PFHxS, using complementary in vivo mouse and in vitro 3D ovarian follicle culture models. Young adult female mice were exposed to a range of concentrations of the PFAS mixture (PFASmix) through daily drinking water for 8 weeks. PFASmix at high concentrations (PFASmix-high) disrupted mouse estrous cyclicity, decreased circulating estradiol, increased testosterone, and promoted follicular atresia. Antral follicles from exposed mice showed decreased Lhcgr and increased Amh expression. Although the number of ovulated oocytes was unchanged following superovulation, PFASmix-high reduced oocyte size and polar body extrusion and altered oocyte cytoskeletal characteristics. In the 3D follicle culture model, direct PFASmix exposure impaired follicle growth, ovulation, and oocyte maturation in a concentration-dependent manner. PFASmix-high suppressed the periovulatory expression of Areg, Ereg, Tnfaip6, and Adamts1 and impaired corpus luteal (CL) development and function, as evidenced by reduced CL spheroid growth and cell survival, decreased expression of Star, Cyp11a1, Hsd3b1, and Lhcgr, and reduced progesterone secretion. PFASmix-high exposure additionally altered the expression of multiple PPAR{gamma}-associated genes in cultured ovarian follicles. Benchmark dose modeling identified estrous cyclicity and follicle rupture as sensitive in vivo and in vitro endpoints, respectively. Together, these findings demonstrated that exposure to the mixture of long-chain PFAS disrupts multiple stages of ovarian function, from follicular development, oocyte maturation to ovulation and luteal development and function and provided mechanistic and quantitative evidence for the reproductive toxicity of PFAS mixtures.
]]></description>
<dc:creator><![CDATA[ Caceres, A. R. R., Zhang, J., Costanza, T., Guo, G., Zhang, Q., Xiao, S. ]]></dc:creator>
<dc:date>2026-09-18</dc:date>
<dc:identifier>doi:10.64898/2026.09.12.750977</dc:identifier>
<dc:title><![CDATA[Exposure to a mixture of long-chain PFAS disrupts ovarian follicle development, ovulation, and luteinization in female mice]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-18</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.14.751462v1?rss=1">
<title>
<![CDATA[
Multispecies translational evaluation of an NMDA receptor modulator reveals analgesic, autonomic-stabilizing, and stress mitigating effects without evidence of abuse liability 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.14.751462v1?rss=1
</link>
<description><![CDATA[
CNS4 is an agonist concentration-biased NMDAR modulator exhibiting GluN2 subtype-dependent activity. Here we evaluated the translational pharmacology of CNS4 across mice, rats, and client-owned surgical oncology dogs. In mice, CNS4 did not produce conditioned place preference, indicating lack of reward liability. CNS4 produced dose-dependent reductions in locomotor activity without motor impairment on accelerating rotarod testing. CNS4 also maintained body temperature 0.5 to 1 degree Celsius above the vehicle group in mice and dogs, consistent with NMDAR-dependent thermoregulatory activity and contrasting with hypothermic effects reported for NMDAR channel blockers such as ketamine. In fear-conditioning paradigms, CNS4 did not impair fear learning, memory consolidation, or fear expression. CNS4 reduced acute stress-induced sucrose preference, suggesting modulation of stress-responsive neural circuits. In a rat spinal nerve ligation model of neuropathic pain, both single-dose and three-day repeated CNS4 administration significantly reversed mechanical, pressure, and thermal hypersensitivity, supporting analgesic efficacy with no apparent evidence of rapid tolerance development. In client-owned surgical oncology dogs undergoing standard veterinary procedures, preliminary findings from 14 dogs (8 CNS4-treated, 6 vehicle-treated) demonstrated stable intraoperative mean arterial pressure and heart rate. Postoperatively, CNS4-treated dogs exhibited normal physiological recovery, with respiratory rate, heart rate, and body temperature returning toward the normal canine range, and required approximately 8% less propofol for anesthetic induction. Collectively, these findings support CNS4 as a novel NMDAR modulator with thermoregulatory, anti-agitative, analgesic, and autonomic-stabilizing properties without evidence of abuse liability, supporting continued translational development for neuropathic pain and possibly neuropsychiatric disorders.
]]></description>
<dc:creator><![CDATA[ Tuohy, J., Ishihara, T., Govindasamy, S., Anandakrishnan, R., Davis, J. L., Harrison, F. E., Huang, Y., Chen, S.-R., Pan, H.-L., Costa, B. ]]></dc:creator>
<dc:date>2026-09-18</dc:date>
<dc:identifier>doi:10.64898/2026.09.14.751462</dc:identifier>
<dc:title><![CDATA[Multispecies translational evaluation of an NMDA receptor modulator reveals analgesic, autonomic-stabilizing, and stress mitigating effects without evidence of abuse liability]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-18</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.11.750985v1?rss=1">
<title>
<![CDATA[
Genetically-encoded discovery and development of peptide-macrocycle imaging agents for PD-L1 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.11.750985v1?rss=1
</link>
<description><![CDATA[
The unique cell surface composition of tumor cells forms the molecular basis for many targeting and cell-based therapies. Here, we describe the development of novel peptide-based targeting agents for programmed death ligand 1 (PD-L1). Molecular imaging by peptide agents, coupled with therapeutic intervention using the same modality, represents a critical advancement in cancer management. Whole-body PET imaging of PD-L1 expression offers a superior alternative to traditional immuno-histochemistry, making PD-L1 radiodiagnostic imaging a highly sought-after modality. PD-L1 targeting modalities developed for clinical imaging to date can be divided into antibodies, protein domains, and small macrocyclic peptides with fewer than 20 amino acids. The latter modalities can address many challenges seen in antibody-based targeting vectors. All potent PD-L1 targeting peptide modalities reported to date rely extensively on non-canonical amino acids (ncAAs). Here, we report a comprehensive structure-activity relationship (SAR) analysis of a family of macrocycles discovered from an Sx2Cx8Cx2 phage-display library composed entirely of natural amino acids (x represents 19 natural amino acids excluding Cys). Using >10,000 variants in ''focused'' phage-display libraries, we optimized these macrocycles to achieve single-digit-nanomolar potency in protein- and cell-based assays. En route to this optimization, the activity of 216 synthetic macrocycles towards PD-L1 was measured in five distinct assays; two leads have been evaluated by imaging in tumor xenografts in mice, and the X-ray structure of one advanced lead in complex with PD-L1 has been determined at 2.78 [A] resolution. This publication demonstrates the development potential of PD-L1-targeting macrocycles that do not require extensive incorporation of ncAAs and the democratization of discovery by mapping the optimization path to single-digit-nanomolar assets for targeted radiopharmaceuticals via canonical phage-display technology.
]]></description>
<dc:creator><![CDATA[ Derda, R., Albert, V., Michnik, M. L., Bao, G., Bahadur, T. K., Kirby, W., Irwin, H., Maiorana, K., Walker, J., Sharma, G., Mistry, R., Zakaria, A., Yazdan, D., Wang, J., Truksa, M., Cai, Y., Woodfield, J., Kaur, M., O'Gara, Z., Dorian, A., Wuest, M., Bergman, C., Klassen, J. S., Kim, H. W., Sawyer, T. K., McMullen, T., Wuest, F. ]]></dc:creator>
<dc:date>2026-09-18</dc:date>
<dc:identifier>doi:10.64898/2026.09.11.750985</dc:identifier>
<dc:title><![CDATA[Genetically-encoded discovery and development of peptide-macrocycle imaging agents for PD-L1]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-18</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.10.750749v1?rss=1">
<title>
<![CDATA[
Hepatotoxicity assessment of antimalarial compounds from microorganisms using a liver organ-on-a-chip system 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.10.750749v1?rss=1
</link>
<description><![CDATA[
Malaria remains a critical public health threat in sub-Saharan Africa and Southeast Asia owing to the emergence of resistance to gold-standard artemisinin-based combination therapies. This epidemiological shift drives an urgent need to explore novel bioactive compounds for malaria treatment. Microorganisms produce diverse secondary metabolites with potent biological activities. To develop microbe-derived antimalarial drugs, rigorous safety evaluations are crucial, particularly regarding hepatotoxicity. Therefore, we evaluated the hepatotoxic potential of three compounds with antimalarial attributes: thiolutin (NATPP0650), cochliodinol (NATPP0437), and 4'-hydroxy-mycophenolic acid (NATPP0604). Acute hepatotoxic responses were determined by biochemical assays for cell viability and damage in HepG2 cells following 24 h exposure, comparing conventional two-dimensional cultures with an organ-on-a-chip (OOC) system featuring in vivo-like functionality and long-term culture capabilities. In both culture platforms, NATPP0650 and NATPP0437 caused significant toxicity at concentrations of 10 and 50 {micro}M, whereas NATPP0604 was relatively non-toxic. Based on the OOC data, NATPP0650 and NATPP0437 exhibited CC50 values of 3.04 and 2.21 {micro}M, respectively, whereas NATPP0604 had a CC50 value > 50 {micro}M, offering a superior safety profile with a selectivity index > 23.7. Functional assessment of HepG2 OOCs showed that NATPP0650 and NATPP0437 markedly suppressed albumin production at 10 and 50 {micro}M, whereas NATPP0604 showed minimal inhibition. However, long-term (7 days) toxicity testing on the OOC model revealed a critical finding: NATPP0604 exerted delayed hepatotoxic effects that were undetectable in the 24-h study, as evidenced by partial reductions in cell viability at 10 and 50 {micro}M and decreased albumin production across all tested concentrations. These findings demonstrate the therapeutic safety potential of NATPP0604 for further development as an antimalarial drug and underscore the importance of the long-term OOC data in establishing accurate safety margins for future clinical trials.
]]></description>
<dc:creator><![CDATA[ Mad-adam, N., Kyaw, H. A., Poonsawaeng, I., Ketsawatsomkron, P., Bunbamrung, N., Pittayakhajonwut, P., Thawai, C., Muta, K. ]]></dc:creator>
<dc:date>2026-09-17</dc:date>
<dc:identifier>doi:10.64898/2026.09.10.750749</dc:identifier>
<dc:title><![CDATA[Hepatotoxicity assessment of antimalarial compounds from microorganisms using a liver organ-on-a-chip system]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-17</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.11.749290v1?rss=1">
<title>
<![CDATA[
Acute head shaking precedes chronic corpus callosum deficits during repeated cocaine exposure in common marmosets 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.11.749290v1?rss=1
</link>
<description><![CDATA[
Background: Stimulant exposure can induce acute stereotyped behaviors and chronic alterations in brain connectivity and white matter integrity. However, the temporal sequence and molecular changes linking these cocaine-induced phenotypes remain unclear. Methods: We combined LabGym-based behavioral analysis, longitudinal brain imaging, and cross-species molecular analysis in 11 common marmosets (Callithrix jacchus; seven male, four female): four underwent behavioral and imaging studies, six provided molecular data, and one provided immunohistochemical data. Male Cryab knockout and wild-type mice underwent functional studies. Results: Acute cocaine (5 mg/kg, intraperitoneally) induced rapid, repetitive lateral head movements, defined as head shaking. After 1 and 10 months of repeated exposure, resting-state functional connectivity was altered in sensory, parietal, prefrontal, motor, and hippocampal regions. Changes were detected at 1 month, whereas diffusion tensor imaging showed reduced fractional anisotropy and axial diffusivity in the corpus callosum splenium at 10 months, with no significant genu changes. Cross-species transcriptomic and proteomic comparison identified DPYSL2 and DNM3 as shared axon-associated molecules. Western blotting showed reduced DPYSL2 in brain tissue from cocaine-treated marmosets. CRYAB localized to O4-positive callosal oligodendrocytes and increased following chronic cocaine exposure. Cryab knockout mice had reduced corpus callosum thickness, increased forced-swim immobility, and reduced open-field distance traveled, supporting a role for CRYAB in corpus callosum integrity and depression-related behavior. Conclusions: These findings show that acute cocaine-induced stereotyped head shaking precedes functional connectivity changes and later corpus callosum deficits. Reduced DPYSL2 may be associated with axonal dysfunction, whereas increased CRYAB may represent a response to cocaine-induced white matter stress.
]]></description>
<dc:creator><![CDATA[ Gu, S. M., Lee, C. K., Yoo, T., Lee, J. J., Eom, H., Son, J. P., Kim, T. H., Park, C.-W., Yoon, S. S., Lee, D., Yun, J. ]]></dc:creator>
<dc:date>2026-09-16</dc:date>
<dc:identifier>doi:10.64898/2026.09.11.749290</dc:identifier>
<dc:title><![CDATA[Acute head shaking precedes chronic corpus callosum deficits during repeated cocaine exposure in common marmosets]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-16</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.11.750627v1?rss=1">
<title>
<![CDATA[
Non-invasive quantification of hepatic necrosis from circulating alanine aminotransferase kinetics in acetaminophen-treated mice in vivo 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.11.750627v1?rss=1
</link>
<description><![CDATA[
Histological necrosis is the reference measure of hepatotoxicity but can only be obtained at terminal cull. A time course requires independent cohorts at every timepoint. Circulating alanine aminotransferase (ALT) can be sampled repeatedly in the same animal, and is released in liver injury. We asked whether serial ALT kinetics can be used to estimate histological necrosis in vivo. Forty-five fasted twelve-week-old male C57BL/6J mice received a single intraperitoneal dose of 350 mg/kg acetaminophen (paracetamol). Plasma ALT and microRNA-122 (miR-122) were measured serially from baseline to 48h as cumulative area-under-the-curve (AUC) to cull, against centrilobular necrosis on haematoxylin and eosin sections as reference (range 0 to 59%, mean 32%). A generalised additive model of necrosis on cumulative ALT AUC and time since dosing predicted necrosis with a leave-one-animal-out cross-validated mean absolute error of 7.7% necrotic area (95% CI 5.6 to 10.0; n=49). A panel of traditional regression and machine-learning models all gave equal or larger error, and adding an additional biomarker or regeneration information did not improve prediction. Serial ALT kinetics therefore provide a calibrated, longitudinal measure of hepatic necrosis in vivo and give a more stable estimate of within-group variance for study planning, while supporting reductions in animal use, because one serially-sampled cohort can replace separate cohorts at each timepoint.
]]></description>
<dc:creator><![CDATA[ Humphries, C., Cartwright, J. A., Aird, R., Candela, M. E., Fernando, A. J., Starkey Lewis, P., Man, J., Potter, C., Scullion, K. M., Cholewa-Waclaw, J., Dear, J. W., Forbes, S. J. ]]></dc:creator>
<dc:date>2026-09-16</dc:date>
<dc:identifier>doi:10.64898/2026.09.11.750627</dc:identifier>
<dc:title><![CDATA[Non-invasive quantification of hepatic necrosis from circulating alanine aminotransferase kinetics in acetaminophen-treated mice in vivo]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-16</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.10.750598v1?rss=1">
<title>
<![CDATA[
Replacing In Vivo Experiments for PK/PD Target Determination Through In Vitro Time-Kill Experiments and PK/PD Modelling Incorporating Inter-strain Variability: Application to Meropenem Against Pseudomonas aeruginosa 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.10.750598v1?rss=1
</link>
<description><![CDATA[
Background. Optimal antibiotic dosing regimens depend on the pharmacokinetic/pharmacodynamic (PK/PD) index that best predicts antibacterial efficacy. PK/PD targets are traditionally determined using murine infection models based on a limited number of bacterial isolates. Objective. This study aimed to investigate whether animal experiments could be replaced by in vitro time-kill experiments performed on a large collection of clinical isolates and analyzed using a modelling approach accounting for inter-strain variability. The proposed framework was evaluated using meropenem against Pseudomonas aeruginosa. Materials and Methods. In vitro time-kill experiments were performed on 66 clinical isolates of P. aeruginosa. A population pharmacodynamic model was developed from experimental data. A murine pharmacokinetic model was reproduced from literature and combined with the pharmacodynamic model to simulate in vivo bacterial burden over time. The relationships between simulated bacterial counts at 24 h and the three main PK/PD indices (fCmax/MIC, fAUC/MIC and %fT>MIC) were characterized using nonlinear mixed-effects Imax models. Results. The PK/PD index showing the strongest correlation with meropenem efficacy at 24 h was %fT>MIC (R2 = 0.989), compared with fAUC/MIC (R2 = 0.373) and fCmax/MIC (R2 = 0.284). These findings are consistent with previous studies using murine thigh infection models. The %fT>MIC target required to achieve a 2-log CFU reduction was estimated at 44%, with substantial inter-strain variability (10th and 90th percentiles: 27% and 71%, respectively). Conclusions. Using meropenem against P. aeruginosa as a proof of concept, we demonstrate that in vitro time-kill experiments combined with pharmacometric modelling can identify the same PK/PD efficacy targets as animal infection models. Moreover, performing experiments on a large panel of clinical isolates enables the quantification of inter-strain variability in PK/PD targets, providing information that may improve their translation to clinical dosing optimization.
]]></description>
<dc:creator><![CDATA[ Buyck, J. M., Krekounian, O., Collet, T., Aranzana-Climent, V., Gregoire, N. ]]></dc:creator>
<dc:date>2026-09-15</dc:date>
<dc:identifier>doi:10.64898/2026.09.10.750598</dc:identifier>
<dc:title><![CDATA[Replacing In Vivo Experiments for PK/PD Target Determination Through In Vitro Time-Kill Experiments and PK/PD Modelling Incorporating Inter-strain Variability: Application to Meropenem Against Pseudomonas aeruginosa]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-15</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.08.750282v1?rss=1">
<title>
<![CDATA[
Protective effects of heat shock protein 70 induction against global warming by using oriental bezoar and ginseng 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.08.750282v1?rss=1
</link>
<description><![CDATA[
The interest in compounds that protect against heat stress-induced damage has been heightened due to world global warming. We found the protective effects of a Japanese natural drug named BG, containing oriental bezoar and ginseng, against heat stress in Drosophila. BG suppressed the heat-induced shortened lifespan and reduced fertility in Drosophila. Interestingly, the protective effects of BG against heat stress were abolished in heat shock protein 70 (HSP70) mutant flies. To see the protective effects in humans, we applied BG on the cytotoxicity in heat-stressed human hepatic cell line, HepG2. BG suppressed heat stress-induced cytotoxicity at 43{degrees}C, and increased HSP70 and heat shock factor 1 (HSF1) mRNA expression in HepG2 cells. These findings indicate that BG protects against heat stress-induced damage via the HSF1/HSP70 pathway and has potential as a therapeutic agent for heat stress-induced disorders, including heatstroke even in human.
]]></description>
<dc:creator><![CDATA[ Inoue, E., Tsubonoya, T., Shimizu, Y., Kawasaki, H., Ishida, N. ]]></dc:creator>
<dc:date>2026-09-15</dc:date>
<dc:identifier>doi:10.64898/2026.09.08.750282</dc:identifier>
<dc:title><![CDATA[Protective effects of heat shock protein 70 induction against global warming by using oriental bezoar and ginseng]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-15</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.07.749896v1?rss=1">
<title>
<![CDATA[
Comparative effects of central and peripheral PDE10A inhibition on weight gain following semaglutide cessation in diet-induced obese mice 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.07.749896v1?rss=1
</link>
<description><![CDATA[
Obesity is a chronic disease of disordered energy balance for which durable weight management remains an unmet need. The rise in use of anorectic therapies, such as incretin analogues, now particularly highlights the need for therapies which maintain weight loss after cessation of effective pharmacotherapy. Phosphodiesterase 10A (PDE10A) inhibition increases energy expenditure and promotes white adipose tissue browning in preclinical models, providing a mechanistic rationale for its therapeutic application. Two complementary studies in male diet-induced obese C57BL/6J mice were conducted to evaluate its pharmacological activity. In a 21-day dose-response study, BEN-8744, an orally bioavailable, peripherally-restricted, PDE10A inhibitor, significantly attenuated body weight gain relative to vehicle at all doses tested. In a 40-day weight maintenance study, mice pre-treated with semaglutide were switched to vehicle-only, BEN-8744, the brain-penetrant PDE10A inhibitor mardepodect or continued semaglutide. Mardepodect was comparable to continued semaglutide, significantly suppressing food intake and weight gain. BEN-8744 showed numerically less gain than vehicle but this difference did not reach statistical significance. Contrary to mardepodect treatment, BEN-8744 also did not significantly improve glucose tolerance or serum insulin. These findings establish BEN-8744 as pharmacologically active through a food-intake-independent mechanism consistent with increased energy expenditure, but indicate that its efficacy is modest relative to additional central PDE10A inhibition. Central PDE10A target engagement is essential for a sustained anti-obesity effect.
]]></description>
<dc:creator><![CDATA[ Grey, J. F. E., Whitton, B., Mulvaney, K. ]]></dc:creator>
<dc:date>2026-09-14</dc:date>
<dc:identifier>doi:10.64898/2026.09.07.749896</dc:identifier>
<dc:title><![CDATA[Comparative effects of central and peripheral PDE10A inhibition on weight gain following semaglutide cessation in diet-induced obese mice]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-14</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.07.749885v1?rss=1">
<title>
<![CDATA[
Physicochemical compatibility and stability of urapidil-propofol admixtures during simulated Y-site Administration 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.07.749885v1?rss=1
</link>
<description><![CDATA[
Background/Objectives: Urapidil with propofol is clinically efficient against elevated blood pressure during sedation. However, their physicochemical compatibility and emulsion stability upon continuous infusion remain unclear. This study aimed to evaluate different mixing ratios and diluents, thereby proving the safety limits for their co-administration. Methods: Urapidil solutions prepared with either sodium chloride (NS) or glucose injection (GS), and emulsified with propofol at different ratios (v/v), were stored for 12 h. Physical compatibility was assessed by visual inspection, pH, osmolality, mean droplet diameter (MDD), polydispersity index (PDI), zeta potential, and percentage of fat globules larger than 5 m (PFAT5). Chemical stability was quantified using high-performance liquid chromatography. Results: pH and osmolality stabilized. Urapidil hydrochloride and propofol contents remained pure at > 95%, MDD was < 500 nm, and PDI was < 0.2. Urapidil proportion in NS was significantly negatively correlated with the zeta potential. PFAT5 was > 0.05% after 2-8 h. In contrast, in GS at a 1:2 ratio, PFAT5 remained < 0.05%, which increased slightly in the 1:1 group at 8 h. PFAT5 stabilized in the high-propofol group (10:1) under all conditions. Conclusions: The chemical compatibility of the admixture was acceptable after 12 h of storage. However, physical compatibility was influenced by the mixing ratio, diluent type, and storage time. For clinical Y-site co-administration, a 10:1 mixing ratio or dilution in 5% GS is recommended. Enhanced proportions must be mixed with NS, while continuous infusion time must be < 2 h to mitigate fat embolism risk.
]]></description>
<dc:creator><![CDATA[ Yue, Y., Wang, L., Li, Y., Zhao, J., Lou, L., Feng, S., Zhao, L. ]]></dc:creator>
<dc:date>2026-09-14</dc:date>
<dc:identifier>doi:10.64898/2026.09.07.749885</dc:identifier>
<dc:title><![CDATA[Physicochemical compatibility and stability of urapidil-propofol admixtures during simulated Y-site Administration]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-14</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.08.748791v1?rss=1">
<title>
<![CDATA[
Integrated pharmacological and structural profiling reveals CB1 residue interaction patterns associated with synthetic cannabinoid receptor agonist efficacy 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.08.748791v1?rss=1
</link>
<description><![CDATA[
Background and Purpose: Among new psychoactive substances, synthetic cannabinoid receptor agonists (SCRAs) encompass considerable structural diversity and show wide variation in cannabinoid receptor 1 (CB1) potency and efficacy, but the molecular and receptor-interaction characteristics underlying these differences remain unclear. We assessed the pharmacological profiles of 16 SCRAs and examined structural features associated with differences in CB1 potency and efficacy. Experimental Approach: CB1 agonist activity was measured in a CB1-G15-based Ca2+ assay, and cataleptic effects were assessed in mice. Ligand-receptor interactions were characterized by molecular docking to an active-state CB1 structure. Principal component analysis (PCA) was applied to residue-level interaction profiles, and the resulting scores were tested for associations with CB1 potency and efficacy. Key Results: Potency and efficacy varied widely across cellular and animal assays, with several SCRAs exhibiting different pharmacological responses across the two experimental systems. PCA identified an interaction pattern whose PC1 scores were significantly associated with Emax but not EC50, with contributions from activation-related CB1 residues including the PHE200-TRP356 toggle switch. Molecular descriptor analysis likewise identified structural features significantly associated with in vitro and in vivo Emax. Conclusion and Implications: Our findings suggest that CB1 efficacy is associated with distinct receptor-interaction patterns among structurally diverse SCRAs. Combining functional pharmacology with receptor-level interaction analysis provides structural insight into SCRA efficacy and may help prioritize emerging compounds for further pharmacological and behavioral evaluation.
]]></description>
<dc:creator><![CDATA[ Kwon, H., Lee, C. k., Kwak, J.-H., Yun, J. ]]></dc:creator>
<dc:date>2026-09-14</dc:date>
<dc:identifier>doi:10.64898/2026.09.08.748791</dc:identifier>
<dc:title><![CDATA[Integrated pharmacological and structural profiling reveals CB1 residue interaction patterns associated with synthetic cannabinoid receptor agonist efficacy]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-14</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.06.749750v1?rss=1">
<title>
<![CDATA[
Blockade of Kv3.1 by MK-801, a PCP-Derivative NMDA Receptor Inhibitor: Implications for Models of Schizophrenia 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.06.749750v1?rss=1
</link>
<description><![CDATA[
MK-801, a phencyclidine (PCP) derivative also known as dizocilpine, is a potent noncompetitive antagonist of the N-Methyl-D-aspartate receptor (NMDAr). The NMDAr plays a critical role in mediating excitatory synaptic transmission in the central nervous system (CNS) and is important in regulating synaptic plasticity, learning, and memory. MK-801 is known to induce schizophrenia-like phenotypes in animal models by blocking the NMDAr. Several studies have reported that the cognitive impairment associated with schizophrenia is linked to functional defects of ion channels in parvalbumin-positive GABAergic interneurons. Kv3.1 is a voltage-gated K+ (Kv) channel involved in the rapid repolarization of the action potential in neurons; it is richly expressed in parvalbumin-positive GABAergic interneurons and is associated with fast, repetitive spike generation. A decrease of Kv3.1 in the CNS has been reported to be associated with schizophrenia. In the present study, the effect of MK-801 on Kv3.1 was investigated using the whole-cell patch-clamp technique in Chinese hamster ovary (CHO) cells stably expressing Kv3.1. MK-801 caused a concentration-dependent inhibition of Kv3.1, with an IC50 of 10.81 M and a Hill coefficient of 0.89. The blocking potency was stronger at depolarized potentials, indicating a voltage-dependent block. MK-801 also produced a use-dependent block, inducing progressive inhibition with repeated stimulation at increased frequencies (1 Hz and 2 Hz), consistent with a delay in recovery from inactivation of Kv3.1 in the presence of MK-801. In addition, MK-801 induced a hyperpolarizing shift in the voltage dependence of the steady-state inactivation curve of Kv3.1. Taken together, these results indicate that MK-801 blocks Kv3.1 expressed in CHO cells in a concentration-, voltage-, and state-dependent manner. Given the importance of Kv3.1 in parvalbumin-positive, fast-spiking GABAergic interneurons, these findings suggest that MK-801 may alter the firing patterns of these inhibitory neurons, contributing to the onset and symptoms of schizophrenia.
]]></description>
<dc:creator><![CDATA[ Park, T. J., PARK, S. W., Park, S., Lim, Y., Lee, H., Kim, J., Kim, H., Kim, D. H., O-Uchi, J., Seo, M. S., An, J. R., Choi, B. H., Bae, Y. M. ]]></dc:creator>
<dc:date>2026-09-13</dc:date>
<dc:identifier>doi:10.64898/2026.09.06.749750</dc:identifier>
<dc:title><![CDATA[Blockade of Kv3.1 by MK-801, a PCP-Derivative NMDA Receptor Inhibitor: Implications for Models of Schizophrenia]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-13</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.05.749594v1?rss=1">
<title>
<![CDATA[
Free fatty acid 2 receptor regulates the NADPH oxidase activity induced by formyl peptide receptor specific agonists 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.05.749594v1?rss=1
</link>
<description><![CDATA[
The neutrophil NADPH oxidase is activated by signals generated by formyl peptide receptor (FPR) agonists recognized by FPR1 (fMLF) and FPR2 (WKYMVM), respectively. Also, the antagonists cyclosporin H (specific for FPR1) and PBP10 (specific for FPR2) inhibit the NADPH oxidase activity when induced by the two peptide agonists. When bound to its receptor, the non-activating positive allosteric modulator Cmp58, specific for the free fatty acid 2 receptor (FFA2R), affects not only the response induced by agonists specific for FFA2R, but also the activating potency but not the efficacy of the two FPR activating peptides. Even though Cmp58 is without effect on the efficacy of the response induced by the FPR agonists, the inhibitory effect of the respective FPR specific antagonists is reduced. This sensitivity shift was reversed by an FFA2R specific antagonist suggesting that two different signals generated by the FPRs activate the NADPH oxidase. According to a receptor trans-regulation model, the activated FPRs generate signals that directly activate the NADPH oxidase and signals that activate the allosterically modulated FFA2Rs to elicit activation of the NADPH.
]]></description>
<dc:creator><![CDATA[ Wang, D., Bjorkman, L. I., Dahlgren, C., Forsman, H. ]]></dc:creator>
<dc:date>2026-09-11</dc:date>
<dc:identifier>doi:10.64898/2026.09.05.749594</dc:identifier>
<dc:title><![CDATA[Free fatty acid 2 receptor regulates the NADPH oxidase activity induced by formyl peptide receptor specific agonists]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-11</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.04.749478v1?rss=1">
<title>
<![CDATA[
Genotoxicity and 90-day oral toxicity of a monk fruit (Siraitia grosvenorii) mogroside preparation (>=95% mogrosides) produced by microbial fermentation 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.04.749478v1?rss=1
</link>
<description><![CDATA[
Here we report genotoxicity and 90-day oral toxicity evaluations of a high-purity, fermentation-derived mogroside preparation rich in mogroside V, the principal sweetener of monk fruit (Siraitia grosvenorii). The test article ([&ge;]95% total mogrosides, 70.3% mogroside V) is produced by a modified Escherichia coli from glucose, offering a higher-purity alternative to traditional monk fruit extracts. The test article was non-mutagenic in a bacterial reverse mutation test (OECD TG 471) and non-clastogenic in an in vitro human lymphocyte micronucleus test (OECD TG 487), up to the maximum recommended concentration. In the 90-day study (OECD TG 408), the test article was given by daily oral gavage at 0, 500, 1000, and 2000 mg/kg body weight/day to Sprague-Dawley rats. There were no deaths and no test article-related effects on clinical signs, ophthalmology, functional observational battery, body weight, food consumption, clinical pathology, thyroid hormones, oestrous cyclicity, or sperm parameters. Minor liver-weight increases lacking any clinical chemistry or histopathological correlates were determined to be non-adverse. No effects were seen on testis weight, sperm endpoints, or spermatogenesis. All other statistically significant differences were minor and considered incidental. The no-observed-adverse-effect level (NOAEL) was 2000 mg/kg body weight/day, the highest dose tested, supporting its safety as a food ingredient.
]]></description>
<dc:creator><![CDATA[ Santos, C. N. S., M, S. S., Paneliya, S. M., Pawluk, M., A, S., Chaturvedula, V. S. P. ]]></dc:creator>
<dc:date>2026-09-11</dc:date>
<dc:identifier>doi:10.64898/2026.09.04.749478</dc:identifier>
<dc:title><![CDATA[Genotoxicity and 90-day oral toxicity of a monk fruit (Siraitia grosvenorii) mogroside preparation (>=95% mogrosides) produced by microbial fermentation]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-11</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.07.749921v1?rss=1">
<title>
<![CDATA[
Aryl Hydrocarbon Receptor (Ahr) Pathway Drives TBBPA Induced Cartilage Development Defects. 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.07.749921v1?rss=1
</link>
<description><![CDATA[
Tetrabromobisphenol A (TBBPA), is one the most widely produced brominated flame retardant, detected in human matrices including cord plasma, raising concern over its impact on embryonic development. Our previous work demonstrated that TBBPA disrupts craniofacial cartilage development in zebrafish; however, inhibition of bone morphogenetic protein (BMP) signaling did not rescue these defects, suggesting the involvement of alternative molecular mechanisms. Transcriptomic profiling revealed significant upregulation of aryl hydrocarbon receptor (Ahr) signaling genes, including cyp1a and cyp1c, as well as reactive oxygen species (ROS) responsive genes, such as nfe and gstp. Consistent with these findings, KEGG pathway enrichment analysis identified significant enrichment of pathways involved in xenobiotic metabolism, cytochrome P450-mediated metabolism, and molecular docking predicted stronger binding of TBBPA to Ahr2 than the Ahr2 agonist TCDD. Then we investigated the role of Ahr signaling and ROS in TBBPA-induced craniofacial cartilage defects using microinjection of Ahr2 translation-blocking morpholino and the antioxidant N-acetylcysteine (NAC), respectively. Immunohistochemistry confirmed concentration-dependent induction of Cyp1a and ROS at environmentally relevant concentrations (0.05;0.005 uM). Ahr2 knockdown using a translation-blocking morpholino rescued TBBPA-induced alterations in Cyp1a expression, ROS levels, DNA damage, the expression of chondrogenesis-related markers (Sox10 and Sox2), and epithelial to mesenchymal transition (EMT) markers (E-cadherin, N-cadherin, and Snail2). Furthermore, Ahr2 knockdown rescued several TBBPA-induced alterations in craniofacial cartilage parameters. Co-exposure of TBBPA with the antioxidant NAC rescued the ROS and DNA damage and rescued only ceratohyal cartilage length, whereas other cartilage parameters remained disrupted. These findings establish a causal role for the Ahr-Cyp1a axis in TBBPA-induced craniofacial cartilage developmental toxicity and identify ROS as an important downstream contributor, indicating that both ROS-dependent and ROS-independent Ahr mechanisms underlined the observed TBBPA induced craniofacial defects.
]]></description>
<dc:creator><![CDATA[ Pathirajage, K. S., Sharma, S., Johnson, T., Sarker, A., Dasgupta, S. ]]></dc:creator>
<dc:date>2026-09-11</dc:date>
<dc:identifier>doi:10.64898/2026.09.07.749921</dc:identifier>
<dc:title><![CDATA[Aryl Hydrocarbon Receptor (Ahr) Pathway Drives TBBPA Induced Cartilage Development Defects.]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-11</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.08.750008v1?rss=1">
<title>
<![CDATA[
Gain- and loss-of-function mutations cause perinatal lethality in mouse models of Birk-Barel syndrome 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.08.750008v1?rss=1
</link>
<description><![CDATA[
Birk-Barel syndrome (BBS), also known as KCNK9 imprinting syndrome, is a neurodevelopmental disorder caused by mutations in the maternally expressed paternally imprinted KCNK9 gene that encodes the TASK3 potassium channel. The first mutation identified in patients with BBS was a loss-of-function variant that reduces the potassium current mediated by TASK3. Subsequent studies have uncovered additional pathogenic variants, including gain-of-function mutations, that increase TASK3 activity. Here, we show that both mutations resulted in the expression of the hyperactive Task3M159I variant or the hypoactive Task3G236R variant, which caused early postnatal lethality in mice when maternally inherited, confirming the monogenic nature of BBS. These results indicate that the pathogenesis of BBS involves mechanisms other than alterations in channel activity. Consequently, the proposed therapeutic strategies, such as pharmacological modulation of the TASK3 channel function or epigenetic reactivation of the paternal KCNK9 allele, do not seem to be viable options. These findings also demonstrate that TASK3 knockout mice are not suitable models for studying KCNK9 imprinting syndrome or for developing therapies for affected patients. Therefore, there is an urgent need for animal models that allow conditional expression of BBS-associated mutations.
]]></description>
<dc:creator><![CDATA[ Feliciangeli, S., Chatelain, F. C., Fiore, F., Bichet, D., Lesage, F. ]]></dc:creator>
<dc:date>2026-09-10</dc:date>
<dc:identifier>doi:10.64898/2026.09.08.750008</dc:identifier>
<dc:title><![CDATA[Gain- and loss-of-function mutations cause perinatal lethality in mouse models of Birk-Barel syndrome]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-10</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.04.748642v1?rss=1">
<title>
<![CDATA[
A Temporal Reliability and Sustainability Score Framework for Ranking Heart Rate Variability Metrics During Pharmacological Autonomic Blockade in Rats 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.04.748642v1?rss=1
</link>
<description><![CDATA[
Background: While Heart Rate Variability (HRV) is a cornerstone of non-invasive autonomic assessment, the sensitivity and sustainability of specific HRV parameters remain debated. This study introduces a "sustainability score" to systematically validate which metrics best reflect autonomic nervous system (ANS) modulation following pharmacological blockade. Methods: Ten male Sprague-Dawley rats were implanted with ECG electrodes. After recovery, rats underwent randomized atropine (1 mg/kg, intraperitoneal) and propranolol (10 mg/kg, intraperitoneal) sessions separated by at least 3 days. Baseline ECG was recorded for 30 min before each session, followed by 90-min post-drug ECG recording. HRV parameters were analyzed in sequential 15-min and 30-min segments. Reliability was assessed using average p-values across post-drug segments and a sustainability score, defined as the number of segments significantly different from baseline. Results: After atropine, HF Power showed the strongest rapid parasympathetic-related response in 15-min segments, with the lowest average p-value (0.1476) and highest sustainability score (4), followed by RSA (p=0.16148; score=4). HFn was less reliable in 15-min segments (p=0.23147; score=2) but became the most reliable parasympathetic-related metric in 30-min segments (p=0.0001; score=3). After propranolol, SI was the most reliable sympathetic-related metric in both 15-min (p=0.18225; score=2) and 30-min segments (p=0.0393; score=2), while SD2/SD1 showed the strongest 30-min sympathovagal-balance response (p=0.0200; score=3). Conclusion: HF Power is recommended for rapid parasympathetic-related assessment in short windows, HFn for longer-window parasympathetic assessment, SI for sympathetic-assessment, and SD2/SD1 for 30-min sympathovagal-balance analysis. Sustainability scoring provides a structured framework for selecting ECG-derived autonomic markers.
]]></description>
<dc:creator><![CDATA[ Ali, M. K., Ji, S., Long, S., Gong, S., Chen, J. D. ]]></dc:creator>
<dc:date>2026-09-09</dc:date>
<dc:identifier>doi:10.64898/2026.09.04.748642</dc:identifier>
<dc:title><![CDATA[A Temporal Reliability and Sustainability Score Framework for Ranking Heart Rate Variability Metrics During Pharmacological Autonomic Blockade in Rats]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-09</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.03.748870v1?rss=1">
<title>
<![CDATA[
A novel workflow integrating whole-body PET microdosing data and therapeutic-dose pharmacokinetics across species to inform first-in-human dose selection 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.03.748870v1?rss=1
</link>
<description><![CDATA[
Introduction: First-in-human studies require dose extrapolation from pharmacokinetic animal studies combined with safety assessments. Subtherapeutic doses of radiolabelled drugs can be administered in preclinical and early clinical development to gain a dynamic pharmacokinetic understanding, potentially informing pharmacologically-based pharmacokinetics (PBPK) models through whole-body PET data. Aims: to develop a PET-informed modelling framework for preclinical-to-human extrapolation, with dolutegravir as a case-study. Methods: We developed a structured workflow integrating micro- and conventional-dose data for interspecies and dose extrapolation. We built a whole-body PBPK model in PK-Sim/MoBi (v12.1) using non-human primate (NHP) data in 5 key organs incorporating dolutegravir physico-chemical properties, protein binding, metabolism and efflux. Sensitivity analyses and parameter estimation were performed sequentially first with PET microdosing organ data over 3h, then with fluid and tissue concentrations following a 2.5 mg/kg IV injection. Finally, 100 Caucasian healthy adults (50% male, 20-80 years) receiving 50 mg qd po after high-fat meals were simulated using the two sets of estimated parameters and physiology-related parameter distributions provided by PK-Sim. Results: Dolutegravir blood data were well described in NHPs over 3 hours, with parameters adjusted to handle the macrodose-related changes. While microdose-based parameter estimates systematically underpredicted exposure, combining NHP micro- and conventional dose data predicted steady-state geometric mean AUC0-24 and Cmax closely matching human reported profiles, although slightly underpredicting Ctrough. Conclusions: PET-PBPK modelling combining micro- and conventional doses in NHPs successfully predicted dolutegravir concentrations in healthy volunteers, additionally informing tissue distribution. This proof of concept study supports early PET data acquisition to build robust priors for first-in-human studies.
]]></description>
<dc:creator><![CDATA[ Nguyen, B. T., Barrail-Tran, A., Ursino, M., Goutal, S., Caille, F., Naninck, T., Le Grand, R., Lambotte, O., Tournier, N., Comets, E. ]]></dc:creator>
<dc:date>2026-09-08</dc:date>
<dc:identifier>doi:10.64898/2026.09.03.748870</dc:identifier>
<dc:title><![CDATA[A novel workflow integrating whole-body PET microdosing data and therapeutic-dose pharmacokinetics across species to inform first-in-human dose selection]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-08</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.02.747152v1?rss=1">
<title>
<![CDATA[
Direct-to-Biology Strategy Accelerates CRBN-Targeting Molecular Glue Degrader Discovery 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.02.747152v1?rss=1
</link>
<description><![CDATA[
The authors have withdrawn this manuscript because a major revision is ongoing, and the timeline for a revised version is pending. Therefore, the authors do not wish this work to be cited as a reference for the project. If you have any questions, please contact the corresponding authors.
]]></description>
<dc:creator><![CDATA[ Chen, H., Shen, Z., Qu, Q., Chen, J., Guo, X., Han, S., Guo, W., Su, W. ]]></dc:creator>
<dc:date>2026-09-08</dc:date>
<dc:identifier>doi:10.64898/2026.09.02.747152</dc:identifier>
<dc:title><![CDATA[Direct-to-Biology Strategy Accelerates CRBN-Targeting Molecular Glue Degrader Discovery]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-08</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.02.746116v1?rss=1">
<title>
<![CDATA[
Structure-Guided Design of C5aR1-Selective Peptide Agonists 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.02.746116v1?rss=1
</link>
<description><![CDATA[
Selective peptide agonists for complement C5a receptor 1 (C5aR1) are valuable tools for dissecting receptor-specific inflammatory signalling, but their optimisation is complicated by overlap with closely related anaphylatoxin receptors and by pathway-dependent pharmacology. Here, we applied a structure-guided computational workflow to prioritise mutations within two C5a-derived peptide agonist scaffolds. FoldX-guided modelling identified position 5 as a candidate optimisation site, with hydrophobic substitutions predicted to improve C5aR1 engagement without corresponding gains at C3aR. Predicted BM1 and BM221 analogues were synthesised by solid-phase peptide synthesis and evaluated across C3aR, C5aR1 and C5aR2 using ERK1/2 phosphorylation and {beta}-arrestin recruitment assays. Position-5 substitutions enhanced C5aR1 functional preference in ERK assays, although additional replacement of Leu6 with Ala reduced target potency and revealed pathway-dependent receptor discrimination. BM1 P5M provided the clearest overall improvement across ERK and {beta}-arrestin readouts. In the BM221 series, A5Nle improved C5aR1 preference over C3aR, whereas A5Nle Abu6Ala produced the most favourable serum stability profile. These findings support position 5 as a transferable optimisation site and demonstrate that C5aR1 potency and receptor selectivity must be balanced during next-generation agonist design.
]]></description>
<dc:creator><![CDATA[ Dent, J. C., Wu, X., Rogl, L., Clark, R. J. ]]></dc:creator>
<dc:date>2026-09-08</dc:date>
<dc:identifier>doi:10.64898/2026.09.02.746116</dc:identifier>
<dc:title><![CDATA[Structure-Guided Design of C5aR1-Selective Peptide Agonists]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-08</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.08.750057v1?rss=1">
<title>
<![CDATA[
mRNA-LNP therapy restores systemic nucleoside imbalance in a mitochon-drial DNA depletion syndrome 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.08.750057v1?rss=1
</link>
<description><![CDATA[
Mitochondrial DNA depletion syndromes (MDS) are inherited conditions caused by pathogenic variants in mitochondrial DNA maintenance genes. Most MDS are severe, fatal and incurable conditions. Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is an MDS resulting from loss-of-function mutations in the TYMP gene, encoding Thymidine Phosphorylase (TP). Systemic nucleoside accumulation caused by TP deficiency disrupts mitochondrial nucleotide homeostasis, which underlies disease progression and mortality. Current treatments, including liver and hematopoietic stem cell transplantation, partially restore TP activity but are invasive, carry substantial risk and are limited by donor availability. Here, we establish TYMP-mRNA in lipid nanoparticles (hTYMP-mRNA-LNPs) as a safe non-viral protein-replacement therapy for MNGIE. Intravenous administration of hTYMP-mRNA-LNPs induced robust hepatic TP expression in a mouse model of MNGIE, was well tolerated and restored circulating nucleosides to wild-type levels within hours, lasting up to three weeks, at a preclinical minimally effective dose of 0.25mg/kg. To facilitate repeat administration and patient access, we demonstrate enhanced efficiency of subcutaneous mRNA-LNP delivery by co-administration of recombinant or mRNA-encoded (SPAM1-mRNA-LNPs) hyaluronidase, achieving effective hepatic TP expression and systemic nucleoside clearance. These findings establish mRNA-LNP-mediated protein replacement as a therapeutic strategy for a primary mitochondrial disease where transient liver-targeted expression is sufficient to correct a systemic metabolic defect. More broadly, our results support the development of mRNA-LNP therapeutics and their subcutaneous delivery as a generalizable platform for treating monogenic diseases, through repeatable, non-viral protein replacement.
]]></description>
<dc:creator><![CDATA[ Carrodus, N. L., Yang, J. J., Ramon, J., Turner, K., Kanse, Y. M., Petridi, S., Xiao, Z., Dhawanjewar, A., Leonard, T. E., Nolan, G., Quaegebeur, A., Marti, R., Cheetham, S. W., van den Ameele, J. ]]></dc:creator>
<dc:date>2026-09-08</dc:date>
<dc:identifier>doi:10.64898/2026.09.08.750057</dc:identifier>
<dc:title><![CDATA[mRNA-LNP therapy restores systemic nucleoside imbalance in a mitochon-drial DNA depletion syndrome]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-08</prism:publicationDate>
<prism:section></prism:section>
</item>
<item rdf:about="https://www.biorxiv.org/content/10.64898/2026.09.01.748647v1?rss=1">
<title>
<![CDATA[
Beyond hazard identification: Discovering mechanisms of action from a ToxCast chemical screen in zebrafish 
]]>
</title>
<link>
https://www.biorxiv.org/content/10.64898/2026.09.01.748647v1?rss=1
</link>
<description><![CDATA[
Large-scale chemical screens are important tools for hazard identification and chemical prioritization, but they less commonly progress from identifying a phenotype to identifying its mechanism. Here, we used zebrafish embryos to screen 4,657 chemicals from the U.S. EPA ToxCast Phase III library for disruption of embryonic development and advanced selected hits through sequential validation using original library stocks, independently sourced chemicals, concentration-response analysis, transcriptomics, and functional experiments. Of 61 primary hits subjected to repeat testing, 33 reproduced the original phenotype, and four of eight compounds subsequently tested using independently sourced chemicals exhibited reproducible concentration-dependent developmental toxicity. We then investigated purpurin, an understudied anthraquinone pigment that caused pericardial edema, circulation defects, and body-axis abnormalities. Transcriptomic analysis of purpurin-exposed embryos revealed coordinated suppression of pathways involved in calcium regulation, ion transport, and neuronal signaling. Increasing extracellular calcium produced a concentration-dependent rescue of purpurin-induced developmental abnormalities, whereas equivalent magnesium supplementation did not, supporting a role for calcium availability or homeostasis in purpurin developmental toxicity. These results demonstrate that large-scale in vivo toxicity screening can be integrated with independent chemical validation and functional follow-up to move beyond hazard identification toward mechanistic understanding of how environmental chemicals disrupt embryonic development.
]]></description>
<dc:creator><![CDATA[ Shahriar, S., Gorelick, D. A. ]]></dc:creator>
<dc:date>2026-09-05</dc:date>
<dc:identifier>doi:10.64898/2026.09.01.748647</dc:identifier>
<dc:title><![CDATA[Beyond hazard identification: Discovering mechanisms of action from a ToxCast chemical screen in zebrafish]]></dc:title>
<dc:publisher>Cold Spring Harbor Laboratory</dc:publisher>
<prism:publicationDate>2026-09-05</prism:publicationDate>
<prism:section></prism:section>
</item>
</rdf:RDF>
