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Chad Weldy, MD, PhD

@chadweldy.bsky.social
280 followers 385 following 49 posts

Cardiologist and physician-scientist @Stanford | Assistant Prof of Medicine | working to accelerate precision medicine through epigenetics and RNA editing weldylab.org

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Chad Weldy, MD, PhD @chadweldy.bsky.social · 20/04/2026
I am thrilled to say that I have accepted a position as Assistant Prof at @stanforduniversity.bsky.social CV Medicine and am launching the Weldy Lab at Stanford! My work integrates genetics, epigenetics, RNA biology, and cardiovascular disease. Check it out: weldylab.org Recruiting!
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Jeremy Berg @jeremymberg.bsky.social · 01/03/2026
NSF Update (Awards through 2/27/26) Directorates to follow 1/10
A line graph showing NSF grant awards made through 2/27/26 for fiscal year 2026 compared with grant awards for fiscal years 2021-2025.
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 26/02/2026
Great to see our review on ADAR1 and dsRNA sensing out in ATVB @ahascience.bsky.social today! Our understanding of the ADAR1-dsRNA-MDA5 axis in complex and rare disease is changing rapidly with important implications for therapy --> worth a read. #RNAsky www.ahajournals.org/doi/10.1161/...
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Drug Monkey @drugmonkey.bsky.social · 23/02/2026
NIH reports on ESI support in FY2025 drugmonkey.wordpress.com/2026/02/22/n...
drugmonkey.wordpress.com
NIH reports on ESI support in FY2025
I will be honest, I am somewhat amazed we are getting any funding data for FY2025 out of NIH. The databook has not yet been updated, so we’re not out of the woods yet. Still, there’s a …
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Jenna Norton @jenna-m-norton.bsky.social · 20/02/2026
Check this out straight from the NIH website, acknowledging that multiyear funding was likely responsible for a 20% decrease in early stage investigators. And that it was expected. A strange approach for someone so committed to the next generation of scientists. grants.nih.gov/news-events/...
Screenshot from an NIH website reading: "Table 1 shows the number of principal investigators (PIs) applying for or receiving an R01-equivalent grant in FYs 2021 to 2025, disaggregated by career stage. NIH supported 1,423 and 1,144 ESIs in FYs 2024 and 2025, respectively. The decrease seen in FY 2025 may likely be due in part to NIH implementing a requirement to use 50% of its remaining competing Research Project Grant (RPG) funds (starting in June 2025) for full-year funded competing RPGs, which was expected to lead to fewer awards and support fewer researchers overall."
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Qianru Wang @qianru.bsky.social · 30/01/2026
Thrilled that @stanfordmedicine.bsky.social Comms highlighted our work on epistasis in their Insights channel! 🧬💛🌟 Grateful to work with an incredible team: my postdoc advisor @euanashley.bsky.social, co-corresponding author Bin Yu, and co–first author Tiffany Tang. med.stanford.edu/news/insight...
med.stanford.edu
Behind the Science: Epistasis, the sly genetic tag team behind some heart disease
Euan Ashley’s lab uncovers the workings of epistasis, a type of interaction between gene variants, that could possibly transform our understanding of inherited heart diseases and much more.
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Jeremy Berg @jeremymberg.bsky.social · 27/12/2025
A relatively random thread about the degrees of NIH Directors. Not surprisingly, almost all NIH Directors have been straight MD holders. However, there have been two MD-PhD holders (actually one PhD, MD and one MD, PhD, but no combined MD-PhD holders) 1/13
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 15/10/2025
Super excited we made the cover of @natcardiovascres.nature.com! Work represents ADAR1 RNA editing within the vascular wall
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Jesse Engreitz @jengreitz.bsky.social · 18/09/2025
Excited for a major milestone in our efforts to map enhancers and interpret variants in the human genome: The E2G Portal! e2g.stanford.edu This collates our predictions of enhancer-gene regulatory interactions across >1,600 cell types and tissues. Uses cases 👇 1/
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 16/09/2025
Hard to understate how wonderful it is to see our manuscript in print today @natcardiovascres.nature.com. We discover ADAR1 to control dsRNA sensor MDA5 in atherosclerosis, creating a new paradigm of endogenous dsRNA sensing as a causal mechanism of disease. Let's get into it 👇 #RNAsky rdcu.be/eGEyu
rdcu.be
Smooth muscle expression of RNA editing enzyme ADAR1 controls activation of the RNA sensor MDA5 in atherosclerosis
Nature Cardiovascular Research - Weldy et al. show that smooth muscle expression of the RNA editing enzyme ADAR1 regulates activation of the double-stranded RNA sensor MDA5 in a novel mechanism of...
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 10/09/2025
I am tremendously excited to share our work revealing the epigenomic landscape of single vascular cells. We discover that enhancers are not only cell type but vascular site specific and regulate the genetic drivers of disease risk. Let's dive in! 🧬👇 #epigenetics www.embopress.org/doi/full/10....
embopress.org
Epigenomic landscape of single vascular cells reflects developmental origin and disease risk loci | Molecular Systems Biology
imageimageVascular sites have distinct susceptibility to disease. Here, through single cell epigenomic profiling and predictive machine learning modeling, this study revealed that regulatory enhancers are vascular site specific, providing insight ...
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Carmen Guerra, MD, MSCE @guerraviswanath.bsky.social · 29/06/2025
www.cbsnews.com/video/saving.... This video shows the real and devastating impact of the cuts to the NIH funding. My heart aches from hearing the story of Natalie Phelps who has stage 4 colorectal cancer and how she and her family are being impacted.
cbsnews.com
Saving money vs. saving lives
Scientists conducting medical research are facing an existential crisis: Layoffs and budget cuts pushed by President Trump that, they say, jeopardize finding a cure for cancer. They tell "Sunday Morni...
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Carl Zimmer @carlzimmer.com · 31/07/2025
Senate committee endorses NIH budget increase, rebuking Trump administration’s proposed 40% cut www.statnews.com/2025/07/31/n...
statnews.com
Senate committee endorses NIH budget increase, rebuking Trump administration’s proposed 40% cut
Senators from both parties endorsed a $400 million increase to the budget of the National Institutes of Health on Thursday
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James Priest @jamesrpriestmd.bsky.social · 19/07/2025
This is the stupidity of it all—carve outs for AK make no sense for the people of Alaska when the UW/Harborview/Seattle Children’s system is the referral destination for anything too complicated for Anchorage
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Carl Zimmer @carlzimmer.com · 26/06/2025
National Science Foundation staff were notified that their office space will be taken over by Department of Housing and Urban Development. It's unclear where the 1,800+ NSF employees will work. Renovation plans apparently include a personal gym for the HUD secretary & family eos.org/research-and...
eos.org
National Science Foundation Staff Booted From Headquarters - Eos
Staff at the National Science Foundation (NSF) were notified on 25 June that the agency’s office space, located in Alexandria, Va., will be taken over by Department of Housing and Urban Development (H...
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euanashley @euanashley.bsky.social · 14/06/2025
Atul Butte died yesterday. The world lost a giant. A big bear of a man. With a huge smile. With love for everyone. With energy that could power a room. I loved everything about Atul. I loved how he was always happy. I loved how excited he was about science and helping people.
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Jeremy Berg @jeremymberg.bsky.social · 09/06/2025
If you weren't angry enough already, here are the rates of non-competitive renewals through May. 4008 Non-competitive renewals were due to be funded in May. The total funded was 99! Some is due to terminations, but most is due to slow grant making due to DOGE review and other impediments. 1/2
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euanashley @euanashley.bsky.social · 29/05/2025
The NIH represents incredible value for the US economy and for the people of the world. We need to safeguard its future and that of our students and trainees. @rachelkeranen.bsky.social and I share our thoughts in today’s LA Times. www.latimes.com/opinion/stor...
latimes.com
Contributor: Slashing NIH research guarantees a less healthy, less wealthy America
The administration's cuts at the National Institutes of Health will obliterate billions in economic gains, America's scientific predominance and untold human lives.
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Jeremy Berg @jeremymberg.bsky.social · 23/05/2025
Senator Durbin noted that some (I believe Republican Senators) had indicated the US had been doing more than its share of biomedical research and it was time for other countries take a turn. I felt I had to interrupt to respond...
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Selin Jessa @selinjessa.com · 03/05/2025
Delighted to share our latest work deciphering the landscape of chromatin accessibility and modeling the DNA sequence syntax rules underlying gene regulation during human fetal development! www.biorxiv.org/content/10.1... Read on for more: 🧵 1/16 #GeneReg 🧬🖥️
biorxiv.org
Dissecting regulatory syntax in human development with scalable multiomics and deep learning
Transcription factors (TFs) establish cell identity during development by binding regulatory DNA in a sequence-specific manner, often promoting local chromatin accessibility, and regulating gene expre...
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Shoa Clarke @shoaclarke.bsky.social · 28/04/2025
Even as someone who has followed everything going on at the NIH very closely, this story made my heart sink. I hope Americans watch this and see the impact of shutting down science. This effects everyone.
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 28/04/2025
Tons of fun at our annual #MyHeartCounts 5K! Amazing event and the one time a year I remember that racing a 5K is….hard, lol. Hit my goal time and looking forward to next year! @stanfordmedicine.bsky.social
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NAVBO @navbo.bsky.social · 23/04/2025
Please join us next Tuesday April 29th at 1 pm EST for our next Symposium on Precision Genomics: CRISPR and Single-Cell Technologies in Vascular Biology, featuring #AaronJames @bgcoonlab.bsky.social @chadweldy.bsky.social and moderated by @vsleekim.bsky.social ! Register here: tinyurl.com/yhcdr68a
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Shoa Clarke @shoaclarke.bsky.social · 22/04/2025
Here is the formal announcement. Jay Bhattacharya and RFK Jr. need to explain. Who exactly are they trying to "make healthy?" www.whi.org/md/news/whi-...
whi.org
4/20/2025
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 22/04/2025
Happy to be part of this NAVBO Symposium on precision genomics (Tues, April 29, 2025). Excited to present on the epigenomic landscape of single vascular cells-ranging from single cell, regulatory networks, and ML prediction of variant effect, so much to talk about! members.navbo.org/calendar-of-...
members.navbo.org
Symposium: Precision Genomics: CRISPR and Single-Cell Technologies in Vascular Biology
NAVBO Symposium: Precision Genomics: CRISPR and Single-Cell Technologies in Vascular Biology  Speakers:  “Integrated transcriptomics of human blood vessels”Aaron James, Johns Hopkins University School...
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Shoa Clarke @shoaclarke.bsky.social · 09/04/2025
Sigh. This study claiming a lack of association between ApoB & plaque has blown up in the media with the typical podcaster/youtuber grifters jumping on it. Beyond the obvious (small N, non-randomized), here are a few reasons the study doesn't show what people claim 🧵: www.jacc.org/doi/10.1016/...
jacc.org
Plaque Begets Plaque, ApoB Does Not: Longitudinal Data From the KETO-CTA Trial
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Valentina Lo Sardo @valels.bsky.social · 30/03/2025
Thrilled to share the🥇paper from the lab @ahajournals.bsky.social. Here we continue to unravel the mysteries of the 9p21.3 CAD locus showing it drives VSMC transition into an osteochondrogenic state, promoting calcification. @clintomics.bsky.social @UWMadison CRB. www.ahajournals.org/doi/10.1161/...
ahajournals.org
9p21.3 Coronary Artery Disease Risk Locus Drives Vascular Smooth Muscle Cells to an Osteochondrogenic State | Arteriosclerosis, Thrombosis, and Vascular Biology
BACKGROUND: Genome-wide association studies have identified common genetic variants at ≈300 human genomic loci linked to coronary artery disease susceptibility. Among these genomic regions, the most i...
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Pete Buttigieg @petebuttigieg.bsky.social · 24/03/2025
From an operational security perspective, this is the highest level of fuckup imaginable. These people cannot keep America safe.
theatlantic.com
The Trump Administration Accidentally Texted Me Its War Plans
U.S. national-security leaders included me in a group chat about upcoming military strikes in Yemen. I didn’t think it could be real. Then the bombs started falling.
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Kelton Minor @keltonminor.bsky.social · 18/03/2025
There are days in life that shake you. I’m shattered 💔 to share that I just found out that the US Government terminated my 2024 NIH Director’s Early Independence Award (~$2 million), threatening my long-promised assistant professor job at Columbia University & academic career... 1/🧵
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 05/03/2025
Yeah nice work @shoaclarke.bsky.social and team! Great to see this out in print!
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Jeremy Berg @jeremymberg.bsky.social · 02/03/2025
I am not going to call this a Bluetorial, because I do not want to sully that term (which, at least I, find joyful). Let’s call it a Orwellial.
media.tenor.com
a cartoon of homer simpson holding a card
ALT: a cartoon of homer simpson holding a card
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Eric Topol @erictopol.bsky.social · 01/03/2025
Francis Collins, the NIH Director for 12 years, led the Human Genome Project and other NIH efforts for 32 years, resigned today. Key words from his resignation letter www.nytimes.com/2025/03/01/u...
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Eric Strong @ericstrong.bsky.social · 26/02/2025
Stanford's president has announced that the university is enacting a staff hiring freeze, citing NIH funding cuts to "indirect costs" of research, as well as a proposal to Congress to increase endowment tax universities pay. "Taken together, these are very significant risks to the university."
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Nature @nature.com · 24/02/2025
The Trump administration's efforts to slash research funding have US graduate students, postdocs and other early-career scientists fearing for their careers. Some might leave the country -- or abandon research altogether. go.nature.com/43ao2zq
go.nature.com
Postdocs and PhD students hit hard by Trump’s crackdown on science
As US federal grants remain frozen and budget cuts loom, anxiety and fear grip early-career researchers.
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Nature @nature.com · 20/02/2025
Almost all grant-review meetings under Trump 2.0 remain suspended at the US National Institutes of Health (NIH), preventing the world’s largest public funder of biomedical research from spending much of its US$47 billion annual budget. go.nature.com/4gM6oW4
go.nature.com
Revealed: NIH research grants still frozen despite lawsuits challenging Trump order
The Trump administration is exploiting a loophole to keep a funding freeze in place, leaving researchers in limbo.
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Han Zhu @hanzhumd.bsky.social · 11/02/2025
Proud to share this new pub from my lab - “Novel Therapeutic Approach Targeting CXCR3 to Treat Immunotherapy Myocarditis” www.ahajournals.org/doi/10.1161/.... Congrats to first authors Vivian Huang and Yin Sun. Our first foray into targeted therapy for this devastating autoimmune condition
ahajournals.org
Novel Therapeutic Approach Targeting CXCR3 to Treat Immunotherapy Myocarditis | Circulation Research
BACKGROUND: Immune checkpoint inhibitors (ICIs) are successful in treating many cancers but may cause immune-related adverse events. ICI-mediated myocarditis has a high fatality rate with severe cardi...
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Eric Topol @erictopol.bsky.social · 10/02/2025
Yes
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Elizabeth Warren @warren.senate.gov · 08/02/2025
Instead of cutting costs for working families, Donald Trump is slashing the federal investments that fund their lifesaving care, fuel their local economy, and lower their health care costs. It’s cruel, short-sighted, and will cost jobs and devastate millions of families.
washingtonpost.com
NIH cuts billions of dollars in biomedical funding, effective immediately
Researchers say it would hurt facilities that work on medical issues such as cancer research and heart disease. Elon Musk contends the old policy was ‘a ripoff.’
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Senator Patty Murray @murray.senate.gov · 08/02/2025
This is what amounts to an ILLEGAL & indiscriminate funding cut for research centers everywhere. It will mean shuttering labs across the country, layoffs in red & blue states, and derailing lifesaving research on everything from cancer to opioid addiction. We all need to speak out to save lives.
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Itai Yanai @itaiyanai.bsky.social · 08/02/2025
Science is absolutely key to the US's success but this government's intention to now dramatically reduce the part of the federal grants that go to the university (in addition to the researchers; the "indirects") is like removing the unseen roots of a tree and expecting it to continue to flourish.
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Carl T. Bergstrom @carlbergstrom.com · 08/02/2025
1. Today the NIH director issued a new directive slashing overhead rates to 15%. I want to provide some context on what that means and why it matters. grants.nih.gov/grants/guide...
grants.nih.gov
NOT-OD-25-068: Supplemental Guidance to the 2024 NIH Grants Policy Statement: Indirect Cost Rates
NIH Funding Opportunities and Notices in the NIH Guide for Grants and Contracts: Supplemental Guidance to the 2024 NIH Grants Policy Statement: Indirect Cost Rates NOT-OD-25-068. OD
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 02/02/2025
Raining and 20+mph winds on the coast? Perfect for the SF half marathon! @stanforddeptmed.bsky.social Cardiology improving their VO2 max this morning. A sign from a spectator read “Seems like an ineffective way to warm up”, true very true
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James Zou @jameszou.bsky.social · 29/01/2025
Our new paper in Circulation shows how #ADMET-AI predicts cardiotoxicity of drugs and generates interpretable insights www.ahajournals.org/doi/abs/10.1...
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Jo Wolfe, PhD @jopabinia.bsky.social · 29/01/2025
This isn't mine at all, but the Magic School Bus TV cartoon, which inspired untold millennials including myself, originated as an NSF grant 🧪 www.nsf.gov/awardsearch/...
nsf.gov
NSF Award Search: Award # 9153967 - THE MAGIC SCHOOL BUS: A CHILDREN'S TELEVISION SCIENCE SERIES Lock
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Jonathan Pritchard @jkpritch.bsky.social · 26/01/2025
Modern GWAS can identify 1000s of significant hits but it can be hard to turn this into biological insight. What key cellular functions link genetic variation to disease? I'm very excited to present our new work combining associations and Perturb-seq to build interpretable causal graphs! A 🧵
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Stanford Department of Medicine @stanforddeptmed.bsky.social · 02/01/2025
Just in time for new year's resolutions, @euanashley.bsky.social and @pbs.org share insights into just how profound #exercise can be for the human body. #newyear2025
www-pbs-org.cdn.ampproject.org
How exercise may be the ‘most potent medical intervention ever known'
It's been well known for many decades that exercise provides many benefits to our health. But a new scientific consortium is revealing new insights into just how profound exercise can be for the human...
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Nature Reviews Cardiology @natrevcardiol.nature.com · 02/01/2025
Extracellular matrix in vascular homeostasis and disease by Lu Zhang, Jing Zhou & Wei Kong: rdcu.be/d5oD9
rdcu.be
Extracellular matrix in vascular homeostasis and disease
Nature Reviews Cardiology - Vascular cells are finely regulated by complex microenvironments, including biomechanical signals from the extracellular matrix. In this Review, Kong and colleagues...
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Chad Weldy, MD, PhD @chadweldy.bsky.social · 02/01/2025
Bringing in the new year on the coast! So much science to do in 2025, ready to get after it!
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Shoa Clarke @shoaclarke.bsky.social · 26/12/2024
A coding variant in BAG3 protects against dilated cardiomyopathy but increases risk for hypertrophic cardiomyopathy and is found to modify the effects of pathogenic TTN variants jamanetwork.com/journals/jam...
jamanetwork.com
Bidirectional Risk Modulator Along the DCM-HCM Spectrum
This cross-sectional study evaluates the association of BAG3 genetic variation with penetrance and longitudinal outcomes of dilated cardiomyopathy (DCM) and hypertrophic cardiomyopathy (HCM).
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Anshul Kundaje @anshulkundaje.bsky.social · 25/12/2024
Our ChromBPNet preprint out! www.biorxiv.org/content/10.1... Huge congrats to Anusri! This was quite a slog (for both of us) but we r very proud of this one! It is a long read but worth it IMHO. Methods r in the supp. materials. Bluetorial coming soon below 1/
biorxiv.org
ChromBPNet: bias factorized, base-resolution deep learning models of chromatin accessibility reveal cis-regulatory sequence syntax, transcription factor footprints and regulatory variants
Despite extensive mapping of cis-regulatory elements (cREs) across cellular contexts with chromatin accessibility assays, the sequence syntax and genetic variants that regulate transcription factor (T...
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