Carole Yauk

@caroleyauk.bsky.social

-Professor, Dept of Biology, University of Ottawa -Canada Research Chair in Genomics and the Environment -Still climbing, running, and snowboarding for now!

Francesco Dondero and Eva Junqué were at SETAC 2026 co-chairing the session titled "PFAS Across the Environment–Human Continuum: From Molecular Mechanisms to Disease-Relevant Outcomes". Held under the track of Environmental and Human Toxicology. Check it all on👉 scenarios-project.eu/scenarios-at...

SETAC announcementEvaFrancesco and other three people posting for the photographEva in front of her poster

SCENARIOS will be at SETAC Europe 36th in Maastricht this May. Would you care to join us for more interesting results on our groundbreaking research results? Check the info 👉https://www.setac.org/resource/what-to-line-up-for-setac-maastricht-before-registration-opens.html

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📣Six days to go Save the date!!📷We are organizing an open workshop on the 7th July at the Auditorium in FORTH/ICE-HT Conference Center in Patras, Greece📷📍 Contact Ms Kleanthi Zacharopoulou (kleanthi@iceht.forth.gr) to register for the workshop

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📣Two days to go! Join us in Alessandria📍or remotely via 👨‍💻https://teams.microsoft.com/l/meetup-join/19%3ameeting_YzZiZjhmNzQtMWNjNy00OWNiLTlhMTUtNWJmMzk1YmEzZTA4%40thread.v2/0?context=%7b%22Tid%22%3a%22492716f8-f2e3-4e38-a05f-af1787e9888d%22%2c%22Oid%22%3a%225d24d93a-192c-4177-a14b-a76d8c88756d%22%7d

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Scenarios will be holding an open workshop with the title: "PFAS and the European Transition: Insights, Technologies, Strategies and Impacts from the SCENARIOS Project". The event will take place on 18 September 2025 in Ferrara, Italy, during RemTech. Stay tuned for more info

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📣Save the date Interdisciplinary symposium “Interdisciplinary Symposium on One Health and PFAS – An Integrated Approach to Human, Animal, and Environmental Health” 📆 Date: June 20th ⏰ Time: 1:30 PM 📍 Venue: University Hospital of Alessandria ✅Format: In-person and online More details to come soon!

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I'm thrilled to share the latest paper out from our lab, led by an amazing PhD student, Angela Ching @angelaching.bsky.social! doi.org/10.1152/ajpe...

CYP1A1/1A2 enzymes mediate glucose homeostasis and insulin secretion in mice in a sex-specific manner | American Journal of Physiology-Endocrinology and Metabolism | American Physiological Society

The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that controls the expression of several downstream targets including xenobiotic metabolism enzymes, cytochrome P450 1A1 and 1A2 (Cyp1a1/1a2). Besides xenobiotic metabolism, AhR also mediates responses to other stressors including high-fat diets (HFDs). Although global deletion or downregulation of AhR protects against metabolic dysfunction in HFD-fed mice, the role of Cyp1a1/1a2 in glucose homeostasis remains unclear. We demonstrated that Cyp1a1 expression is induced in mouse pancreatic islets not only by xenobiotic exposure but also by HFD feeding. Since CYP1A1/1A2 enzymes can produce reactive oxygen intermediates, we hypothesized that chronic CYP1A1/1A2 activation may contribute to HFD-induced metabolic dysfunction in mice, and thus, deleting these enzymes may be protective. We fed 29- to 31-wk-old male and female global Cyp1a1/1a2 knockout (CypKO) and wild-type (CypWT) mice a 45% HFD or standard chow for 14 wk. CypKO females were partially protected from HFD-induced glucose intolerance, and chow-fed CypKO females had lower plasma insulin and suppressed insulin secretion in isolated islets compared with CypWT females. Meanwhile, CypKO males exhibited HFD-induced hyperinsulinemia later than CypWT males. HFD feeding elevated Cyp1a1 and other stress genes in CypWT male islets but not in CypKO islets, indicating that CYP1A1 mediates islet stress responses. Liver pathology, adiposity, and adipose inflammation were primarily affected by diet, not genotype, in both sexes. Our study highlights a novel sex-dependent role for Cyp1a1/1a2 in shaping the systemic metabolic response to HFD feeding, suggesting that CYP1A1/1A2 enzymes are involved in glucose homeostasis, insulin secretion, and islet stress responses. NEW & NOTEWORTHY Cytochrome P450 (CYP)1A1/1A2 enzymes have sex-specific roles in glucose homeostasis in mice. In females, global Cyp1a1/1a2 deletion partially protects from glucose intolerance in high-fat diet (HFD)-fed mice and lowers plasma insulin in chow-fed mice. In males, Cyp1a1/1a2 deletion delays HFD-induced hyperinsulinemia in vivo and inhibits HFD-induced islet stress responses. Genotype-driven differences were only seen in islets, suggesting a novel role for islet CYP1A1/1A2 enzymes in responding to metabolic stress.

doi.org

Staffers at the US National Institutes of Health published a letter of dissent, taking issue with what they see as the politicization of research and destruction of scientific progress under the Trump administration. They called it the Bethesda Declaration, for the location of the NIH.

NIH employees publish ‘Bethesda Declaration’ in dissent of Trump administration policies | CNN

Staffers at the US National Institutes of Health published a letter of dissent, taking issue with what they see as the politicization of research and destruction of scientific progress under the Trump...

cnn.it

If you have not signed please do. If you have signed try to get several others to sign TONIGHT - NIH Director testifies before senate appropriations at 10am ET - lets make sure they know how many people are angry about what has been done to NIH

@LaBonneLaB@labonnelab.bsky.social · last yr.

Proud to be a signatory on this letter in support of the courageous staff at the NIH who penned the Bethesda Declaration to decry the ongoing politicization and damage to the US biomedical research infrastructure which has been the envy of the world.