Josh Popp
@jmpopp.bsky.social
120 followers 230 following 3 posts
Computational genomics PhD student at Johns Hopkins BME
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Reposted by Josh Popp
bennystrobes.bsky.social
Exciting updates!!
(1) I just opened my lab at Boston Children’s Hospital (Harvard-affiliated)
(2) I’m hiring a postdoc focused on integrating GWAS and functional genomic data. Reach out if you’re interested or connect at ASHG next week!
(3) Learn more at stroberlab.com
Strober Lab
The Strober lab is a computational group at Boston Children's Hospital (a Harvard Medical School affiliated hospital) focused on developing statistical and machine learning tools applied to human gene...
stroberlab.com
Reposted by Josh Popp
captmarkkelly.bsky.social
I’ve spent a good chunk of my career relying on American science and engineering to keep me alive. Yesterday, RFK Jr. testified at the U.S. Senate Finance Committee. It was sad to see him try to destroy the life’s work of so many American scientists. He shouldn’t be in this job.
Reposted by Josh Popp
Reposted by Josh Popp
gcbias.bsky.social
The startup named Herasightm after the goddess who threw her disabled child off a mountain, seems focused on public outreach using embryo selection for IQ to win over far rightwing pseuds & techbros
A tweet "Elon Musk thinks our new embryo screening startup, 
@herasight, is "cool". Cool." with a picture included in the tweet of a web widget showing an embryo selected for IQ. A quote tweet of Cremieux a pseud who "tweets about race & genetics"
see here for more background on Cremieux/Lasker: https://www.theguardian.com/us-news/2025/mar/03/natal-conference-austin-texas-eugenics

Text reads:
"The widget pictured below gives you the expected range of predicted IQs (or disease risks) for the number of embryos. The difference between the average and the highest gives you the expected gain in IQ if you were selecting the embryo with the highest predicted IQ. "
Reposted by Josh Popp
gcbias.bsky.social
Numerous FAQs & think pieces were written promising GWAS participants & the broader public that sociogenomics was focused on education improvement, environmental interventions, and away from the hereditarian past. All quickly betrayed.
Reposted by Josh Popp
gcbias.bsky.social
It is depressing, but all too predictable, how swiftly we’ve gone from the Social Science Genetic Association Consortium offering reassurances about the uses of behavioural polygenic scores to one of their lead authors marketing embryo selection for IQ
Text from an FAQ in Okbay et al 20222: 
https://www.nature.com/articles/s41588-022-01016-z 
a similar same statement is made in an FAQ in 2025: https://www.biorxiv.org/content/10.1101/2025.05.14.653986v1.supplementary-material
Text reads:
"The results of SSGAC studies have sometimes been used by online platforms, including some companies, to predict individual outcomes. We recognize that returning individual genomic “results” can be a fun way to engage people in research and other projects and to feed or stoke their interest in genomics. But it is important that participants/users understand that these individual results are not meaningful predictions and should be regarded essentially as entertainment. Failure to make this point clear risks sowing confusion and undermining trust in genetics research"
Reposted by Josh Popp
carolynbertozzi.bskyverified.social
This is what can be achieved today due to longstanding federal support of academic basic science alongside close partnership of universities, private industry and NIH intramural initiatives. An ecosystem worth not just saving but doubling down on!

innovativegenomics.org/news/first-p...
First Patient Treated with Personalized CRISPR Therapy, Developed in Just Six Months
The first on-demand CRISPR therapy for an infant with a rare metabolic disease developed by the IGI and collaborators around the world.
innovativegenomics.org
Reposted by Josh Popp
supmerlin.bsky.social
1/n 🚨Very excited to share our recent work!🚨
To understand gene regulation across diverse environmental conditions and cellular contexts, we treated a broad array of human cell types with three environmental exposures in vitro.
www.biorxiv.org/content/10.1...
Reposted by Josh Popp
profsimonfisher.bsky.social
Remember when you first learned about genetics at school? All those fascinating examples of human traits that are each apparently determined by just a single gene? Time to check in on some of your favourites to see how they’re doing. 🧬🧵🧪 1/n
Four images to illustrate some prominent single-gene myths. Top left shows a photograph of a person deftly rolling their tongue into a U-shape. Top right shows a photograph of a person’s ear, highlighting the shape and features of the earlobe and cartilage. Bottom left shows a close-up photograph of a person’s eye, with a vivid blue colouration. Bottom right shows a photograph of a person poised to write with their left hand on the blank white page of a spiral-bound notebook.
Reposted by Josh Popp
larryglickman.bsky.social
I keep coming back to this pithy 1854 statement by Abraham Lincoln about “the legitimate object of government,” which the Trump administration is undermining by offloading to individuals tasks, including life or death matters, that are more effectively, efficiently and fairly done collectively.
The legitimate object of government, is to do for a community of people, whatever they need to have done, but not do, at all, or can not, as well do, for themselves—in their separate, and individual capacities. 
Abraham Lincoln, 1854
Reposted by Josh Popp
joeallenjoe.bsky.social
This framing is their framing, and NYT took the bait. The correct and accurate framing is: “Deep cuts to medical research threatens progress on cancer and heart disease research, costs the economy $80B, and threatens 300,000 jobs across red and blue states”
Reposted by Josh Popp
bstranger.bsky.social
The website for the NIH Office of Research on Women's Health has nearly been dismantled between yesterday morning and today. Piece by piece throughout the day. What, the new administration will no longer support or tolerate discussion of research affecting the health of >50% of humans? Seriously?!?
docbecca.bsky.social
The entire website for the NIH Office of Research on Women's Health (ORWH) is very nearly stripped bare. This is so, so devastating. orwh.od.nih.gov/research/fun...
orwh.od.nih.gov
Reposted by Josh Popp
Academic workers across the country are organizing to call on our congressional representatives on Thursday, 1/30, at 3pm ET / 12pm PT to demand these restrictions be lifted immediately.
There will be a training over zoom at the beginning of the event.
Join us!
form.jotform.com/250226137228...
Join researchers across the country in fighting restrictions on the NIH
Please click the link to complete this form.
form.jotform.com
Reposted by Josh Popp
jkpritch.bsky.social
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 🧵
Reposted by Josh Popp
jkpritch.bsky.social
Very excited about this new work from our lab! Explainer thread coming soon
@minetoota.bsky.social
biorxiv-genetic.bsky.social
Causal modeling of gene effects from regulators to programs to traits: integration of genetic associations and Perturb-seq https://www.biorxiv.org/content/10.1101/2025.01.22.634424v1
Reposted by Josh Popp
sashagusevposts.bsky.social
How population stratification makes environments look like genes. A short 🧵:
Reposted by Josh Popp
thebeehive.bsky.social
First post in the Good Place! Our preprint on cellular behavior analysis in TCR T cells & cancer cell live-cell imaging data is out! This 3-year collaboration led by pd Archit Verma w/ Alex Marson & Julia Carnevale, with segmentation & tracking by @davidvv & team! www.biorxiv.org/content/10.1...
Cellular behavior analysis from live-cell imaging of TCR T cell–cancer cell interactions
T cell therapies, such as chimeric antigen receptor (CAR) T cells and T cell receptor (TCR) T cells, are a growing class of anti-cancer treatments. However, expansion to novel indications and beyond l...
www.biorxiv.org
Reposted by Josh Popp
kauralasoo.bsky.social
A great paper and a great thread! One point that I partcularly liked was this one:
"In particular, [GWAS] variants can be trait specific in two ways: they can either affect a trait-specific gene or affect a pleiotropic gene in a context-specific manner."
jeffspence.github.io
What do GWAS and rare variant burden tests discover, and why?

Do these studies find the most IMPORTANT genes? If not, how DO they rank genes?

Here we present a surprising result: these studies actually test for SPECIFICITY! A 🧵on what this means... (🧪🧬)

www.biorxiv.org/content/10.1...
Specificity, length, and luck: How genes are prioritized by rare and common variant association studies
Standard genome-wide association studies (GWAS) and rare variant burden tests are essential tools for identifying trait-relevant genes. Although these methods are conceptually similar, we show by anal...
www.biorxiv.org
Reposted by Josh Popp
jeffspence.github.io
What do GWAS and rare variant burden tests discover, and why?

Do these studies find the most IMPORTANT genes? If not, how DO they rank genes?

Here we present a surprising result: these studies actually test for SPECIFICITY! A 🧵on what this means... (🧪🧬)

www.biorxiv.org/content/10.1...
Specificity, length, and luck: How genes are prioritized by rare and common variant association studies
Standard genome-wide association studies (GWAS) and rare variant burden tests are essential tools for identifying trait-relevant genes. Although these methods are conceptually similar, we show by anal...
www.biorxiv.org
Reposted by Josh Popp
jeffspence.github.io
Why do association studies prioritize trait-specific variants???

A quick thread about the importance of thinking about all traits at once 👇 1/6 (🧪🧬)
Reposted by Josh Popp
Reposted by Josh Popp
Reposted by Josh Popp
alexisbattle.bsky.social
Our study is up! Context-specificity galore -- we explore genetic regulation of gene expression across many cell types and temporal states simultaneously in an efficient experimental system + scRNA-seq:
jmpopp.bsky.social
In vitro systems like this one offer an efficient way to explore gene regulation across many contexts that have been tricky to study thus far: like the cell types and transient cell states that arise during differentiation
jmpopp.bsky.social
To understand the molecular impacts of genetic variation, we need to look beyond healthy adult tissues, and even beyond healthy adult cell types