Alexander Jais
@jaislab.bsky.social
92 followers 210 following 10 posts
Group leader @HIMAG_Leipzig | Neurobiology & Metabolic Research | Neural circuits linking food intake, brain function and metabolism in obesity
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Reposted by Alexander Jais
easdnews.bsky.social
🧠Meet Dr Alexander Jais ( @www.helmholtz-munich.de ), #EFSD/@novonordiskfond Future Leaders Awardee.

Don't miss his presentation on sucrose-responsive neurons & glucose metabolism at the EFSD/NNF Future Leaders Symposium at #EASD2025:

📅Thurs, 18 Sept 2025 | 🕛12:45 CEST

📖 doi.org/10.1016/j.is...
Portrait of Dr Alexander Jais, recipient of the EFSD research award, affiliated with the Helmholtz Institute for Metabolism, Obesity and Vascular Research. Text overlay reads 'Recipient Research Portrait' and 'Doctor Alexander Jais' Research summary text describing Dr Alexander Jais’ study on sucrose-responsive hypothalamic neurons and their role in controlling glucose metabolism and insulin sensitivity, highlighting potential implications for understanding the brain’s role in diabetes. Promotional graphic for EFSD/Novo Nordisk Foundation Future Leaders Award with the EFSD logo, text 'Apply for research grants and fellowships', and the website europeandiabetesfoundation.org
jaislab.bsky.social
Congratulations 🎉
New iScience paper by PhD student Stephanie Puente‑Ruiz:
The non-classical opioid peptide N/OFQ promotes macrophage recruitment and metabolic inflammation
www.cell.com/iscience/ful...
B cell-derived nociceptin/orphanin FQ contributes to impaired glucose tolerance and insulin resistance in obesity
Biological sciences; Endocrinology; Natural sciences; Physiology
www.cell.com
Reposted by Alexander Jais
danieljdrucker.bsky.social
Based on studies in mice selective, durable AgRP neuron inhibition may prove an attractive strategy for the future treatment of T2D in humans www.jci.org/articles/vie...
Reposted by Alexander Jais
spiegel.de
Aus Deutschland sprechen sich 110 Wissenschaftlerinnen und Wissenschaftler öffentlich für Tierversuche aus. Frank Kirchhoff, Initiator der Aktion, sagt, warum Experimente an Mäusen, Ratten und Fischen immer noch sein müssen.
Tierversuche: Warum sich mehr als 110 Forschende zu den Experimenten bekennen
Aus Deutschland sprechen sich 110 Wissenschaftlerinnen und Wissenschaftler öffentlich für Tierversuche aus. Frank Kirchhoff, Initiator der Aktion, sagt, warum Experimente an Mäusen, Ratten und Fischen immer noch sein müssen.
www.spiegel.de
Reposted by Alexander Jais
lundjens.bsky.social
Is increased hunger really a primary driver of obesity?
In this Letter to the Editor in @nejm.org, Thorkild Sørensen, Mark Friedman and I question the widespread idea that many develop obesity because they overeat 👇 1/5
www.nejm.org/doi/full/10....
@cbmr.science
The Physiology of Hunger | NEJM
To the Editor: The review article by Fasano (Jan. 23 issue)1 concerning human nutrition and hunger regulation omits the crucial role of autophagy, a cellular recycling process vital for maintaining...
www.nejm.org
jaislab.bsky.social
(5) This reveals a dual role for endothelial Notch signaling: it mitigates short-term glucose transport deficits but contributes to central insulin resistance over time. Here, we identify the hypothalamic Notch-Cav1 axis as a therapeutic target for addressing diet-induced metabolic disorders!
jaislab.bsky.social
(4) However, sustained Notch1 activation suppresses caveolin-1 expression, reduces insulin transport across the BBB and impairs systemic insulin sensitivity. Our findings indicate that the molecular structure of the BBB adapts to dietary changes, influencing glucose and insulin transport differently
jaislab.bsky.social
(3) We demonstrate that a high-fat diet (HFD) quickly reduces Notch1 signaling in hypothalamic brain microvascular endothelial cells (BMECs), leading to impaired glucose uptake. Overexpressing the Notch intracellular domain in BMECs can maintain glucose uptake despite HFD exposure...
jaislab.bsky.social
(2) By revealing the crucial role of endothelial Notch signaling in regulating glucose transporter expression, caveola formation, and BBB permeability, we identify a mechanism that explains how dietary signals influence brain insulin access and systemic insulin sensitivity.
Reposted by Alexander Jais
jaislab.bsky.social
Congratulations, Yiyi! 🎉
We find that high-fat diet rapidly reduces Notch signaling in the brain, affecting glucose uptake and insulin sensitivity. Our study also highlights the role of caveolae in blood-brain barrier permeability and insulin transport:
www.sciencedirect.com/science/arti...
Reduced Notch signaling in hypothalamic endothelial cells mediates obesity-induced alterations in glucose uptake and insulin signaling
Short-term transition to high-fat diet (HFD) feeding causes rapid changes in the molecular architecture of the blood-brain barrier (BBB), BBB permeabi…
www.sciencedirect.com