Jonathan Mitchel

Jonathan Mitchel

@j-e-mitchel.bsky.social

PhD candidate at Harvard-MIT HST program. Working on computational methods to make sense of genomics data. Member of Kharchenko and Sunyaev labs.

311 Followers 1,105 Following 5 Posts Joined Jul 2024
4 months ago

Overall, this work has spurred many new hypotheses by pinpointing which genes and contexts are relevant for each disease. As usual, this project was not without it's challenges - I have to give a huge shoutout to my PhD mentors Shamil Sunyaev + Peter Kharchenko and all of our fantastic collaborators

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4 months ago

Our method found evidence explaining ~2x the number of GWAS loci compared to pseudobulk eQTLs. We dove deep into several disease-specific findings, especially relating to Parkinson's disease (TRPV2 may be a protective gene, supported by recent studies).

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4 months ago

Therefore, our method leverages eQTL models with continuous cell state interactions. While such models are now more commonly used, we specially adapted their output to enable eQTL-GWAS colocalization testing across the cell state space.

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4 months ago

Uniquely, scJLIM does NOT require clustering cells before eQTL mapping. Arbitrary clustering cutoffs can kill statistical power for detecting eQTLs when you cluster too finely or too coarsely, and we typically don't know the expected resolution to look at a priori.

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4 months ago
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A single-cell genetic colocalization test improves power and resolves disease-mediating cell types Statistical colocalization testing methods can determine if the same single-nucleotide polymorphism (SNP) underlies both a genome-wide association study (GWAS) locus as well as an expression quantitat...

Super excited that my paper describing the scJLIM single-cell genetic colocalization tool is finally out on bioRxiv! scJLIM enables you to identify the specific cell states where GWAS genetic variants impact gene expression. Check it out! www.biorxiv.org/content/10.1...

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1 year ago
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40 years ago all of Genbank was published in print form by NAR. The same format today would require over 4 light seconds of shelf space. To a year of progress in 2025.

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1 year ago
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Chemotherapy induces myeloid-driven spatially confined T cell exhaustion in ovarian cancer Anti-tumor immunity is crucial for high-grade serous ovarian cancer (HGSC) prognosis, yet its adaptation upon standard chemotherapy remains poorly und…

1/n New paper alert 🚨 We're thrilled to share our just published paper in #CancerCell
Do you ever wonder how the #TME in #HGSC changes during chemotherapy? Check it here: www.sciencedirect.com/science/arti... and let’s dive into the highlights together #spatialbiology #ovariancancer #cancerresarch

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1 year ago
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Delighted to introduce our new spatial transcriptomics tool, SpottedPy, allowing the identification of tumour hotspots at different scales and the exploration of distances and overlap with tumour microenvironment niches: genomebiology.biomedcentral.com/articles/10....

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1 year ago
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1/23 Big news for the #ObenaufLab! So excited to finally share our new study providing another puzzle piece, why immunotherapy fails in many tumors, now out in @Nature 🧵👇 www.nature.com/articles/s41...

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1 year ago
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Cancer escapes immunotherapies by mutating its surface, meaning even groundbreaking #CARTCell therapies fail too often. But what if #GenerativeAI could design CAR-T with de novo binders faster, targeting resistant tumors? 🧵 www.biorxiv.org/content/10.1... (1)

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1 year ago
Human blood cell transcriptomics unveils dynamic systemic immune modulation along colorectal cancer progression Background Colorectal cancer (CRC) is the second leading cause of cancer-related deaths worldwide. CRC deaths can be reduced with prevention and early diagnosis. Circulating tumor DNA-based liquid…

ctDNA isn't great at detecting small, early stage cancers which don't shed much DNA. Could the systemic anti-cancer immune response be used for early detection? Interesting data here from colorectal cancer

Paper found with researchbriefing.com.

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1 year ago
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🎨 In case anyone need…

The NIH BioArt Source is an awesome library of *free* professionally drawn illustrations for scientific presentations or figures. Downloadable in HD. Thank you NIH for this invaluable tool 🙏!

Check it out 👇
bioart.niaid.nih.gov

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1 year ago
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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.

#paperoftheweek @jackiheraudfarlow.bsky.social & Co report that GGNBP2-CNOT10/11 complex formation promotes MDA5 sensing of immunogenic self dsRNAs, upon ADAR1 mutation. Congrats to all involved! 👏🏻

www.science.org/doi/10.1126/...

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1 year ago
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Common genetic variants contribute more to rare diseases than previously thought Assessing the influence of common mutations on rare disease risk.


www.nature.com/articles/d41...

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1 year ago
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Now online in Cancer Discovery: PKN2 Is a Dependency of the Mesenchymal-like Cancer Cell State - by Shane Killarney, Kris Wood and colleagues doi.org/10.1158/2159...

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1 year ago
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New tool reveals how breast and lung tumours avoid immune detection Researchers at the Francis Crick Institute and UCL have developed a tool to analyse a key set of genes linked to the ability of cancer cells to hide from the body’s immune system.

Researchers at the Crick and UCL have developed a tool to analyse genes linked to the ability of tumours to hide from the immune system.

The findings were led by first author Clare Puttick as part of the TRACERx study funded by Cancer Research UK

www.crick.ac.uk/news-and-rep...

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1 year ago
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Lab-Grown Human Immune System Model Uncovers Weakened Response in Cancer Patients To better understand why some cancer patients struggle to fight off infections, Georgia Tech researchers have created tiny lab-grown models of human immune systems.

That's a really interesting system from Georgia Tech. Immune Organoids! The research team used synthetic hydrogels which can make a microenvironment for B cells, isolated from human tonsils and blood, to mature and produce antibodies.
Published in Nature Materials.
news.gatech.edu/news/2024/11...

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1 year ago
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The bone ecosystem facilitates multiple myeloma relapse and the evolution of heterogeneous drug resistant disease - Nature Communications Multiple myeloma (MM) is an osteolytic malignancy that is incurable due to the emergence of treatment resistant disease. Defining how, when and where myeloma cell intrinsic and extrinsic bone microenv...

Hot off the press: @mathonco.bsky.social members, including
Anna Gaffney, Matt Froid, and yours truly, working with the Lynch lab, use #MathOnco #ABM models to describe the bone ecosystem in Multiple #Myeloma:
link.springer.com/article/10.1...

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1 year ago
The transcription factor activity gradient (TAG) model: contemplating a contact-independent mechanism for enhancer–promoter communication A biweekly scientific journal publishing high-quality research in molecular biology and genetics, cancer biology, biochemistry, and related fields

This one dramatically increased my awareness of how much we might be wrong with our current view of gene regulation by chromatin - and genesdev.cshlp.org/content/36/1...

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1 year ago
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Human skin rejuvenation via mRNA Aging is characterized by a gradual decline in function, partly due to accumulated molecular damage. Human skin undergoes both chronological aging and environmental degradation, particularly UV-induce...

wake up babe, new george church skincare routine just dropped

www.biorxiv.org/content/10.1...

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1 year ago
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A multi-modal single-cell and spatial expression map of metastatic breast cancer biopsies across clinicopathological features - Nature Medicine Single-nucleus and single-cell RNA sequencing plus spatial profiling with four methods of core biopsies from 60 patients with metastatic breast cancer reveal patient-specific gene expression programs ...

Spatialomics reveals T cell behaviors in metastatic breast cancer: infiltration vs. exclusion. Cool work from @KlughammerLab www.nature.com/articles/s41...

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1 year ago
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Cancer-associated fibroblasts maintain critical pancreatic cancer cell lipid homeostasis in the tumor microenvironment Pancreatic ductal adenocarcinoma (PDAC) is an aggressive malignancy with abundant cancer-associated fibroblasts (CAFs) creating hallmark desmoplasia t…

Cancer-associated fibroblasts maintain critical pancreatic cancer cell lipid homeostasis in the tumor microenvironment www.sciencedirect.com/science/arti...

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1 year ago
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Excited to share our latest work! In it, we develop a new method for studying RNA localization via proximity labeling: OINC-seq! In contrast to other proximity-based methods, labels deposited on RNAs are read directly by sequencing without the need for biotinylation. biorxiv.org/cgi/content/...

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1 year ago
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Incredible graphic - the myriad of ways that bacteria defend themselves against antibiotics.

14 resistance mechanisms, summarised by Idan Yelin & Roy Kishony in Cell

www.sciencedirect.com/science/arti...

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1 year ago
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Hansen Lab The official lab website of Anders Sejr Hansen at MIT Department of Biological Engineering

Exciting to see the SciTwitter community rebuild and take off this week at Blue Sky.

We are interested in 3D Genome Structure and Function and long-range gene regulation.

Reposting from Twitter some of the things that came out of the lab ( www.ashansenlab.com ) over the last year or so.

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1 year ago
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New preprint up! We sequenced hundreds of samples from across one of Earth's oldest living organisms - the Pando aspen clone - to understand how mutations accumulate and spread in long-lived clonal organisms. Our results were…surprising. 1/30

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1 year ago
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All - Bluesky Directory A curated collection of all things relating to the Blue Sky social media platform.

Starter packs are genius, but I was surprised there wasn't a list of them for people to find.

So I built it:
blueskydirectory.com/starter-pack...

The website monitors the packs being shared and adds the ones it finds to the database.

Missed your stater pack? Message me and I'll get it added.

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