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Klaus Kaestner

@kkaestner.bsky.social
330 followers 168 following 49 posts

Professor of Genetics, UPenn. Diabetes and organ development. Member of the Human Pancreas Analysis Program.

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Klaus Kaestner @kkaestner.bsky.social · 15/09/2026
We need to pay more taxes, now. This week, the interest rate on US 10 year treasure bonds exceeded 5%. With a national debt, once the current low interest bonds have been refinanced, this comes to 2 trillion dollars in interest payments alone. More than defense and medicaid combined. Act now.
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Klaus Kaestner @kkaestner.bsky.social · 20/08/2026
The NIH is asking for comments on their proposed changes to the NIH grant review process and its reporting to the institute’s leadership. Here my comments, feel free to adapt them. www.linkedin.com/posts/klaus-...
linkedin.com
The NIH is asking for comments on their proposed changes to the NIH grant review process and its reporting to the institute’s leadership. Here my comments, feel free to adapt them: When considering… |...
The NIH is asking for comments on their proposed changes to the NIH grant review process and its reporting to the institute’s leadership. Here my comments, feel free to adapt them: When considering th...
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Klaus Kaestner @kkaestner.bsky.social · 23/07/2026
Exciting new paper on Foxl1 positive telocytes in the intestine just published in CMGH: www.cmghjournal.org/article/S235...
cmghjournal.org
Single-cell transcriptome profiles of Foxl1-lineage cells along the intestinal crypt-villus axis
Intestinal epithelial cells rely on a complex array of stromal signals to determine their fate and function along the crypt-villus axis, but the precise cellular sources and combinations of signals at...
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Klaus Kaestner @kkaestner.bsky.social · 29/04/2026
Finally a roadmap for well-controlled studies with intestinal organoids! See these guidelines in CMGH: www.cmghjournal.org/action/showP...
cmghjournal.org
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Klaus Kaestner @kkaestner.bsky.social · 24/04/2026
The new paper by the HPAP team on DNA methylation in human endocrine and exocrine cells with aging and in T2D is finally out. rdcu.be/ffbgE
rdcu.be
Epigenetic adaptation of beta cells across lifespan and disease
Nature Metabolism - Mapping of genome-wide DNA methylation patterns in human islet alpha and beta cells highlights age and type 2 diabetes dependent adaptations and compensatory responses to...
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Klaus Kaestner @kkaestner.bsky.social · 16/04/2026
I am so very grateful to my colleagues who nominated me for this year’s Albert Renold Prize of the European Association for the Study of Diabetes. It is lovely to have the work of my lab thus recognized. Thanks to all the young scientists who worked with me over the years. Best, Klaus
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Klaus Kaestner @kkaestner.bsky.social · 06/04/2026
See below - makes sense
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Klaus Kaestner @kkaestner.bsky.social · 06/04/2026
It took a long time, but finally our paper on the role of the winged helix transcription factor FOXL1 in the vilification of the intestine is published! Congratulations to Guoli and the team! pmc.ncbi.nlm.nih.gov/articles/PMC...
pmc.ncbi.nlm.nih.gov
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Klaus Kaestner @kkaestner.bsky.social · 29/08/2025
house mouse maintains constant telomere length throughout life url: academic.oup.com/nar/article/...
academic.oup.com
The house mouse maintains constant telomere length throughout life
Abstract. Telomeres protect the chromosome ends from deleterious DNA damage response and repair activities. In humans, telomerase maintains telomere length
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Klaus Kaestner @kkaestner.bsky.social · 30/06/2025
Happy to announce that HPAP now has some 180 human pancreatic analyzed by highly multiplexed CODEX analysis. Thanks to Dr. Powers and the whole HPAP team! Here is the link to the experiment data download page: hpap.pmacs.upenn.edu/explore/down... 🧪
hpap.pmacs.upenn.edu
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Klaus Kaestner @kkaestner.bsky.social · 25/06/2025
Very proud indeed to have been together on a stage celebrating NIDDK's 75th anniversary at the recent ADA meeting in Chicago with Drs Rogers, Cefalu, Gubitosi-Klug and Kirscher. Always grateful for NIDDK's support of our research! 🧪
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Klaus Kaestner @kkaestner.bsky.social · 25/06/2025
@aoxing2.bsky.social
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Klaus Kaestner @kkaestner.bsky.social · 18/06/2025
Very happy to share the results of a multi-national scientific collaboration on the factors that control telomere length. Hope you like it! Best, Klaus academic.oup.com/nar/article-...
academic.oup.com
Separation of telomere protection from length regulation by two different point mutations at amino acid 492 of RTEL1
Abstract. RTEL1 is an essential DNA helicase that plays multiple roles in genome stability and telomere length regulation. The ultra-long telomeres of the
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Klaus Kaestner @kkaestner.bsky.social · 17/06/2025
I was truly honored to contribute as Keynote speaker to the 25th meeting of the European Islet Study Group in Malmo, Sweden. Fantastic meeting, lots of progress on all fronts! See you all next year in Barcelona!
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Klaus Kaestner @kkaestner.bsky.social · 13/06/2025
Thank you, Christos, for the shoutout! It was a great honor to be invited as Keynote speaker to the European Islet Study Group conference in Malmo. Great meeting, I learned a lot!
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Klaus Kaestner @kkaestner.bsky.social · 23/05/2025
What really happens at the onset of type 1 diabetes? The HPAP team profiled the immune system of the lymph nodes near the pancreas, the reservoir of the relevant immune cells. Read more here: www.nature.com/articles/s41... 🧪
nature.com
Immune perturbations in human pancreas lymphatic tissues prior to and after type 1 diabetes onset - Nature Communications
The status of immune cells within human pancreatic lymphatic tissues during the onset and progression of type 1 diabetes (T1D) is underexplored. Here, by flow cytometry and CITEseq, the authors profil...
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Reposted by Klaus Kaestner
Klaus Kaestner @kkaestner.bsky.social · 20/05/2025
Two new, NIH funded postdoc positions available. (1) Somatic mutations as primary causes of autoimmune disease and (2) Epigenetic drivers of diabetes in humans. Send CV and names of references to kaestner@upenn.edu
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Klaus Kaestner @kkaestner.bsky.social · 20/05/2025
A wonderful day, celebration the recently graduated Dr. Michelle Lee at the UPenn hooding ceremony.
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Klaus Kaestner @kkaestner.bsky.social · 20/05/2025
Two new, NIH funded postdoc positions available. (1) Somatic mutations as primary causes of autoimmune disease and (2) Epigenetic drivers of diabetes in humans. Send CV and names of references to kaestner@upenn.edu
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Klaus Kaestner @kkaestner.bsky.social · 28/04/2025
Do the islet biology community, we have good news. Good news- the HPAP islet perifusion dashboard for glucagon and insulin secretion is now live on PANC-DB: hpap.pmacs.upenn.edu/explore/peri... 🧪
hpap.pmacs.upenn.edu
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Klaus Kaestner @kkaestner.bsky.social · 04/04/2025
It appears that Biotech is no longer an attractive option 🧪 www.inquirer.com/health/spark...
inquirer.com
Spark Therapeutics is laying off 337 people, more than half its workforce, starting in May
The layoffs at the gene therapy company are part of restructuring of Spark Therapeutics by its owner, Roche Group.
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Mike Schatz @mikeschatz.bsky.social · 08/03/2025
One of the most powerful moments of the day came from Emily Whitehead who told the story of how she was the first pediatric patient to receive CAR T-cell therapy for her leukemia at age 5: “I stand up for science because science saved my life. And that’s a fact.” @standupforscience.bsky.social
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Klaus Kaestner @kkaestner.bsky.social · 07/03/2025
Great to see thousands at the rally to save science in Philadelphia today! A truly inspiring event!
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Klaus Kaestner @kkaestner.bsky.social · 20/02/2025
Dear Friends, Happy to share our new preprint which describes the discovery of a new alpha to beta cell transitional cell type in the human pancreas using singe cell multiomic and genetic lineage tracing. www.biorxiv.org/content/10.1...
biorxiv.org
Single-cell multiome analysis supports α-to-β transdifferentiation in human pancreas
Spontaneous transdifferentiation of pancreatic glucagon-producing alpha to insulin secreting beta cells has been observed in mouse but not in human islets1. Here, we analyzed the largest single cell d...
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Klaus Kaestner @kkaestner.bsky.social · 05/02/2025
While it may be true, as claimed by Mr. Bannon, that in the IT industry H1b visas have been abused to bring in cheap labor, in biomedical research progress can only be made by recruitment of foreign fellows. There simply are not a sufficient pool of US born Ph.D.s left who want to work in academia
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Klaus Kaestner @kkaestner.bsky.social · 05/02/2025
I do hope that President Trump and Mr Musk realize that US biomedical research is still one of our strengths and only possible because of NIH funding
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Klaus Kaestner @kkaestner.bsky.social · 05/02/2025
It appears that NIH study sections (IRGs) are operating again
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Meredith Welch-Devine @mwdevine.bsky.social · 05/02/2025
I should have put 🧪 in the first time to get this in the science feed. US science folks: Call!
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Klaus Kaestner @kkaestner.bsky.social · 03/02/2025
My NIH Commons login stopped working today- anyone have similar issues?
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Diabetologia @diabetologiajnl.bsky.social · 07/01/2025
Up front & free to read in our Jan issue #editorspicks: Targeting the NLRP3 inflammasome–IL-1β pathway in type 2 diabetes and obesity tinyurl.com/bdf9ec33
tinyurl.com
Targeting the NLRP3 inflammasome–IL-1β pathway in type 2 diabetes and obesity - Diabetologia
Increased activity of the NACHT, LRR and PYD domains-containing protein 3 (NLRP3) inflammasome–IL-1β pathway is observed in obesity and contributes to the development of type 2 diabetes and its compli...
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Reposted by Klaus Kaestner
Nature Portfolio @natureportfolio.nature.com · 16/01/2025
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Klaus Kaestner @kkaestner.bsky.social · 16/01/2025
Collaborative science at its best - discovery of new loci AND relevant cell types in childhood obesity. elifesciences.org/articles/954...
elifesciences.org
3D genomic features across >50 diverse cell types reveal insights into the genomic architecture of childhood obesity
Integration of GWAS summary statistics with extensive 3D genomic datasets generated in a myriad of different cell types provides genomic insights into pediatric obesity pathogenesis.
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Jacki Heraud-Farlow @jackiheraudfarlow.bsky.social · 06/12/2024
Time for a 🧵 on our new paper from the Walkley lab in @scienceimmuno.bsky.social. If you're into RNA editing by ADARs, double-stranded RNA (dsRNA) sensing, post-transcriptional gene regulation and CRISPR screening, then read on! 1/X www.science.org/doi/10.1126/... #RNASky #ImmunoSky
science.org
GGNBP2 regulates MDA5 sensing triggered by self double-stranded RNA following loss of ADAR1 editing
GGNBP2, CNOT10, and CNOT11 are required for innate immune response after the loss of ADAR1-mediated editing of self dsRNA.
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Reposted by Klaus Kaestner
Alison Hoens @physioktbroker.bsky.social · 02/01/2025
AI algorithms can accurately figure out a person’s ‘MileAge’ or metabolomic age using molecules generated during the metabolic processes like digestion.🧪https://www.science.org/doi/10.1126/sciadv.adp3743
science.org
Metabolomic age (MileAge) predicts health and life span: A comparison of multiple machine learning algorithms
Machine learning–based metabolomic aging clocks predict health and death, with nonlinear models better capturing aging signals.
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Klaus Kaestner @kkaestner.bsky.social · 02/01/2025
Very excited to share our new paper just out in Science Translational Medicine. Using human genetics and mouse models we show that G6PC2 is critical for controlling glucagon secretion, and suggest this enzyme as a potential drug target for diabetes treatment. www.science.org/doi/epdf/10....
science.org
G6PC2 controls glucagon secretion by defining the set point for glucose in pancreatic α cells
You have to enable JavaScript in your browser's settings in order to use the eReader.
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Klaus Kaestner @kkaestner.bsky.social · 24/12/2024
Somewhat fewer review invitations would be nice Happy Hanukkah and Merry Christmas, and hoping for a more peaceful 2025
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 12/12/2024
This is amazing AND crazy, and reflects how complex our immune systems are and how much we still have to learn... 🧪 Looking forward to reading it in full
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Klaus Kaestner @kkaestner.bsky.social · 10/12/2024
Happy to share that our “IsletTester” mouse strain has not been accepted by the MMRRC for free distribution to academic labs. Strain number is 71912. You can go to their website to register your interest. Hope the mouse is useful for your work!
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Reposted by Klaus Kaestner
Howard Lee @hlee.bsky.social · 10/12/2024
Arctic tundra once stored carbon. Now it emits climate-warming pollution - NPR 🧪 #AGU24 www.npr.org/2024/12/10/n...
npr.org
Arctic tundra now emits planet-warming pollution, federal report finds
Arctic tundra is releasing greenhouse gases into the atmosphere as hotter temperatures melt frozen ground and wildfires increase.
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Klaus Kaestner @kkaestner.bsky.social · 03/12/2024
Another argument for publishing in society journals - just got my bill from Diabetes- $1600 for publication costs At Cell Metabolism it would have been four times that …
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Klaus Kaestner @kkaestner.bsky.social · 02/12/2024
watermark.silverchair.com/db230887.pdf...
watermark.silverchair.com
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Klaus Kaestner @kkaestner.bsky.social · 02/12/2024
Very happy about our new paper in Diabetes, where we describe the "IsletTester" mouse, a new stably hyperglycemic, immunodeficient model for the testing of human islets or stem cell derived beta-like cells. These mice will be made available via the MMRRC. Hope you will find them useful!
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Klaus Kaestner @kkaestner.bsky.social · 26/11/2024
Dear Friends, Like a lot of my colleagues, I decided to move from Twitter/X (@KlausKaestner) to BlueSky. Hope to meet you all here! Best, Klaus
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