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Alexander Jais

@jaislab.bsky.social
108 followers 206 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
franz @franzanth.bsky.social · 04/09/2025
I reread this over and over again and this absolutely breaks my brain
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Reposted by Alexander Jais
European Association for the Study of Diabetes @easdnews.bsky.social · 12/08/2025
🧠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
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Alexander Jais @jaislab.bsky.social · 11/08/2025
Brain lithium levels drop early in AD before symptoms fully emerge
rdcu.be
Lithium deficiency and the onset of Alzheimer’s disease
Nature - Lithium has an essential role in the brain and is deficient early in Alzheimer’s disease, which can be recapitulated in mice and treated with a novel lithium salt that restores the...
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Reposted by Alexander Jais
Nature Metabolism @natmetabolism.nature.com · 03/07/2025
ICYMI:
bit.ly
When gut fibroblasts feed epithelial cells to death
Nature Metabolism, Published online: 26 June 2025; doi:10.1038/s42255-025-01315-9Epithelial cell death driven by oxidative stress is a hallmark of inflammatory bowel disease (IBD), but the upstream triggers are unclear. A new study reveals that fibroblast-derived lipids enriched with polyunsaturated fatty acids induce epithelial ferroptosis. Genetic or pharmacological inhibition of fibroblast ACSL4 alleviates intestinal inflammation and injury in IBD models.
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Alexander Jais @jaislab.bsky.social · 26/06/2025
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...
cell.com
B cell-derived nociceptin/orphanin FQ contributes to impaired glucose tolerance and insulin resistance in obesity
Biological sciences; Endocrinology; Natural sciences; Physiology
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Reposted by Alexander Jais
Daniel Drucker @danieljdrucker.bsky.social · 23/06/2025
The biology of eating disorders www.nature.com/articles/s41...
nature.com
Examining the biological causes of eating disorders to inform treatment strategies - Nature Reviews Neuroscience
Recent years have seen a growth in our understanding of the biological drivers of eating disorders and their interactions with environmental and psychosocial factors. Foldi and Griffiths consider how ...
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Reposted by Alexander Jais
Lex Kravitz @kravitzlab.com · 19/06/2025
This was a really fun project: We blocked obesity in mice by making them do a tiny bit of work for their food. www.sciencedirect.com/science/arti...
sciencedirect.com
A simple action reduces high-fat diet intake and obesity in mice
Diets that are high in fat cause overeating and weight gain in multiple species of animals, suggesting that high dietary fat is sufficient to cause ob…
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Reposted by Alexander Jais
Nature Metabolism @natmetabolism.nature.com · 11/06/2025
bit.ly
A food-sensitive olfactory circuit drives anticipatory satiety
Nature Metabolism, Published online: 11 June 2025; doi:10.1038/s42255-025-01301-1The authors describe a sensory circuit involving the medial septum (MS), where MS glutamatergic neurons integrate food odours to prime satiety and regulate nutrient intake.
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Alexander Jais @jaislab.bsky.social · 16/05/2025
Astrocytes as regulators of neuromodulatory signaling www.science.org/doi/10.1126/...
science.org
Astrocytes, hidden puppet masters of the brain
Astrocyte signaling pathways influence neuronal networks and behavioral responses to neuromodulators
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Reposted by Alexander Jais
Daniel Drucker @danieljdrucker.bsky.social · 15/05/2025
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...
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Reposted by Alexander Jais
DER SPIEGEL @spiegel.de · 24/04/2025
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.
spiegel.de
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.
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Reposted by Alexander Jais
adhideb.bsky.social @adhideb.bsky.social · 13/05/2025
Check out the roadmap to the first consensus atlas of human and mouse #adiposetissue. Great initiative by the adipose bionetwork of #humancellatlas! @humancellatlas.org @humancellatlas.bsky.social
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Reposted by Alexander Jais
Jens Lund @lundjens.bsky.social · 08/05/2025
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
nejm.org
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...
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Alexander Jais @jaislab.bsky.social · 25/04/2025
GABAergic, Non-AgRP neurons are critical for the regulation of overnutrition 🍟🍔 - this new study shows that leptin exerts a substantial portion of its appetite- and body-weight-regulatory effects via PNOC/NPY-expressing neurons! @cp-cell.bsky.social @mpi-metabolism.bsky.social
cell.com
Hypothalamic PNOC/NPY neurons constitute mediators of leptin-controlled energy homeostasis
Activation of PNOCARC neurons promotes feeding. Here, Solheim et al. describe PNOC neurons in the murine ARC as mediators of leptin action in body weight maintenance. Moreover, they molecularly and fu...
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Reposted by Alexander Jais
Daniel Drucker @danieljdrucker.bsky.social · 16/04/2025
A critical role of Notch signalling in brain endothelial cells in the pleiotropic effects of short-term dietary transitions on blood brain barrier functionality @cp-cellreports.bsky.social www.cell.com/cell-reports...
cell.com
Reduced Notch signaling in hypothalamic endothelial cells mediates obesity-induced alterations in glucose uptake and insulin signaling
Zhu et al. describe a rapid downregulation of Notch1 expression in hypothalamic blood-brain barrier (BBB) endothelial cells after high-fat diet (HFD) feeding. Notch activation prevents HFD-induced red...
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Reposted by Alexander Jais
Kimberley Bruce @drkimberleybruce.bsky.social · 15/04/2025
Trem2 is more flexible than we thought, and likes to bind to ApoE4! Congrats #EmmaLietzke and #KaylaSprenger on your work! It's a privilege to work with you!! @cuendocrinology.bsky.social alz-journals.onlinelibrary.wiley.com/doi/10.1002/...
alz-journals.onlinelibrary.wiley.com
Synergistic reduction in interfacial flexibility of TREM2R47H and ApoE4 may underlie AD pathology
BACKGROUND The strongest genetic drivers of late-onset Alzheimer's disease (AD) are apolipoprotein E4 (ApoE4) and TREM2R47H. Despite their critical roles, the mechanisms underlying their interaction.....
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Alexander Jais @jaislab.bsky.social · 09/04/2025
A thread 🧵: Our study redefines current concepts of insulin entry into the brain under conditions of nutritional excess. www.sciencedirect.com/science/arti... @www.helmholtz-munich.de @mpi-metabolism.bsky.social
sciencedirect.com
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…
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Reposted by Alexander Jais
D’Agostino Lab @dagostinolab.bsky.social · 07/04/2025
Our latest study @science.org #Immunology on perception of #hunger and #immunity. #BrainBody #Melanocortin #AgRP #POMC neurons. #Brain-liver axis. Permissive action of #stress #hormones. @ukri.org @fbmh-uom.bsky.social www.science.org/doi/10.1126/...
science.org
Brain sensing of metabolic state regulates circulating monocytes
Brain-initiated hunger signals control circulating monocyte dynamics.
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Alexander Jais @jaislab.bsky.social · 07/04/2025
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...
sciencedirect.com
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…
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