Jesse Garcia Castillo, PhD
@jgcastillo.bsky.social
510 followers 670 following 32 posts
CRI Irvington Postdoctoral Fellow/Jeroen Roose’s lab at UCSF. HHMI Gilliam Fellow'21. Berkeley MCB PhD alum/Michel DuPage’s Lab. Cal State LA alum. 🏳️‍🌈🇲🇽 (He/His/Him). Interested in all things immunology, but T cells are my favorite!
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jgcastillo.bsky.social
My third paper from grad school is out on Biorxiv! This was a fun collaboration with @olzmannlab.bsky.social where we show that Ferroptosis Suppressor Protein-1 is a better target than GPX4 because it disrupts Treg function while leaving effector T cell function intact.
biorxiv-immuno.bsky.social
Selective disruption of lipid peroxide homeostasis in intratumoral regulatory T cells by targeting FSP1 enhances cancer immunity https://www.biorxiv.org/content/10.1101/2025.07.06.663397v1
Reposted by Jesse Garcia Castillo, PhD
Reposted by Jesse Garcia Castillo, PhD
Reposted by Jesse Garcia Castillo, PhD
biorxiv-immuno.bsky.social
Site-specific genome engineering of primary human natural killer cells for programmable anti-tumor function https://www.biorxiv.org/content/10.1101/2025.10.05.680386v1
Reposted by Jesse Garcia Castillo, PhD
Reposted by Jesse Garcia Castillo, PhD
labliston.bsky.social
The impact has been enormous, with Tregs going from being a niche frowned-upon subset of immunology, to underpinning our entire understanding of how the immune system works. Therapies based on boosting Tregs (e.g. IL2) or bypassing Tregs (anti-CTLA4) are in the clinic.
jgcastillo.bsky.social
Great to see Tregs win a Nobel prize!!
labliston.bsky.social
A small primer on the #NobelPrize awarded to Mary E. Brunkow, Fred Ramsdell and Shimon Sakaguchi today. This prize was for combining two separate fields of immunology research - genetic research on IPEX and immunology research of regulatory T cells (#Tregs), with enormous impact on biology/medicine
Reposted by Jesse Garcia Castillo, PhD
labwaggoner.bsky.social
Foreign epitope–specific naïve Treg cells fine-tune the primary response of Tconv cells specific for the same epitope by curbing the Th1 fate while allowing a robust response @jimmunol.bsky.social @uminnpress.bsky.social
academic.oup.com/jimmunol/adv...
Reposted by Jesse Garcia Castillo, PhD
labwaggoner.bsky.social
Eomes controls the acquisition of regulatory and cytotoxic function in CD4+ T cells that are critical for limiting immune toxicity, while maintaining persistence and tumor control after immunotherapy @cp-immunity.bsky.social
www.cell.com/immunity/ful... @fredhutch.org
Reposted by Jesse Garcia Castillo, PhD
Reposted by Jesse Garcia Castillo, PhD
tommytang.bsky.social
Best practices and tools in R and Python for statistical processing and visualization of lipidomics and metabolomics data www.nature.com/articles/s4...
Reposted by Jesse Garcia Castillo, PhD
maikbischoff.bsky.social
1/12 A very special moment for me! 🎉

My first paper as corresponding author—a @jcb.org Perspective on how contact-based decision-making in collective cell migration can itself encode blueprints for complex patterns and shapes.

rupress.org/jcb/article/...

#cellbio #devbio #science

🧵for details
Cartoon of a speculative heterogenous cell population performing mesenchymal collective cell migration.
jgcastillo.bsky.social
👀 saved
johanduchene.bsky.social
⚠️ Half of commercial antibodies miss their target!
So how do you pick the right one for your experiment?

Here’s the solution 👉
Antibody characterization data (all tested in KO cells) are now available at:
🔗 onlygoodantibodies.co.uk

Tested by @ycharos.bsky.social & @oga-community.bsky.social
OGA - Only Good Antibodies Community
onlygoodantibodies.co.uk
Reposted by Jesse Garcia Castillo, PhD
hjp.bsky.social
Super excited to get this out. This collab started a few years ago and is the first paper from it. Here, with experimental and computational approaches we:

1. establish that cell villages can be just as accurate (one might argue more accurate!) than arrayed-based designs

bsky.app/profile/bior...
biorxiv-genetic.bsky.social
Cell villages and Dirichlet modeling map human cell fitness genetics https://www.biorxiv.org/content/10.1101/2025.09.26.678880v1
Reposted by Jesse Garcia Castillo, PhD
ascbiology.bsky.social
According to news reports, NIH is on track to award nearly all of its FY25 budget. Program officers—working long hours despite staff losses—made it possible. Take a moment to thank your PO for their dedication.
Reposted by Jesse Garcia Castillo, PhD
vignuzzilab.bsky.social
Very cool paper that I presented to journal club today by Singer et al, by Tal Danino and Charlie Rice labs.

I LOVE this paper!
rdcu.be/eH4le

As a postdoc in Andino lab 20 years ago, we took a similar strategy to deliver recombinant RNA viruses or saRNA by intracellular S. typhimurium.
Engineered bacteria launch and control an oncolytic virus
Nature Biomedical Engineering - CAPPSID relies on an engineered S. typhimurium to act as a synthetic ‘capsid’ to transcribe and deliver viral RNA inside cancer cells, launching a virus...
rdcu.be
Reposted by Jesse Garcia Castillo, PhD
labliston.bsky.social
For our #flowcytometry peeps, would you like to have a single fix/perm protocol that is optimised for everything? One that preserves fluorophores while allowing simultaneous TF and cytokine staining? How about 100-fold cheaper?

You got it:
currentprotocols.onlinelibrary.wiley.com/doi/10.1002/...
currentprotocols.onlinelibrary.wiley.com
Reposted by Jesse Garcia Castillo, PhD
slavov-n.bsky.social
an we understand biology from "infinite" amounts of perturbation data ?

- Only if we measure the relevant molecules.

Perturbations and data scale 𝐜𝐚𝐧𝐧𝐨𝐭 compensate for missing the relevant molecules.

🧵