James Olzmann

@olzmannlab.bsky.social

Professor of Molecular Therapeutics and Metabolic Biology at UC Berkeley; Departments of Molecular & Cell Biology and Nutritional Sciences & Toxicology. Lipid droplets, ferroptosis, ubiquitin, drug development.

Happy to share the final version of the study where we describe a central role for vitaminB2 in regulating membrane redox state - some new cool experiments were added since the preprint was posted - pls check this out thttps://www.nature.com/articles/s41556-025-01856-x

Riboflavin metabolism shapes FSP1-driven ferroptosis resistance - Nature Cell Biology

After performing a focused CRISPR–Cas9 screen, Skafar et al. identify riboflavin (vitamin B2) as a regulator of FSP1 stability that modulates phospholipid peroxidation and ferroptosis sensitivity in c...

nature.com

Awesome paper and super useful resource of CRISPR-based screens to identify regulators of #LipidDroplet biology under different metabolic conditions: crisprlipid.org

James Olzmann@olzmannlab.bsky.social · 5mo ago

Sooo happy to share our new paper in @nature.com “CLCC1 promotes hepatic neutral lipid flux and nuclear pore complex assembly.” A terrific collaboration with @arrudalab.bsky.social, led by co–first authors Alyssa Mathiowetz and Emily Maymand. www.nature.com/articles/s41...

Cool paper alert 🚨! Congrats @olzmannlab.bsky.social! Proud to have made a small contribution to this. One of the prettiest membrane-protein structures I have simulated ☺️

James Olzmann@olzmannlab.bsky.social · 5mo ago

Sooo happy to share our new paper in @nature.com “CLCC1 promotes hepatic neutral lipid flux and nuclear pore complex assembly.” A terrific collaboration with @arrudalab.bsky.social, led by co–first authors Alyssa Mathiowetz and Emily Maymand. www.nature.com/articles/s41...

A little late on here but happy to share my 3rd first author paper from grad school finally out in Science Advances!! In collaboration with James Olzmann's group, we find that Tregs utilize FSP1/Aifm2 for preventing lipid peroxide accumulation and preserve their suppressive function in tumor models.

James Olzmann@olzmannlab.bsky.social · 6mo ago

Thrilled to have contributed to this work led by @jgcastillo.bsky.social during his PhD at UC Berkeley w/ Michel DuPage. Targeting FSP1 in T cells boosts anti-tumor immunity by relieving Treg suppression, revealing a new immunomodulatory therapeutic axis. www.science.org/doi/10.1126/...

Thrilled to have contributed to this work led by @jgcastillo.bsky.social during his PhD at UC Berkeley w/ Michel DuPage. Targeting FSP1 in T cells boosts anti-tumor immunity by relieving Treg suppression, revealing a new immunomodulatory therapeutic axis. www.science.org/doi/10.1126/...

Selective disruption of lipid peroxide homeostasis in intratumoral regulatory T cells by targeting FSP1 enhances cancer immunity

Deletion of Aifm2 disrupts Treg cell immunosuppression within tumors without inciting autoimmune pathology in mice.

science.org

Happy new year! I've so enjoyed the end-of-year lists of people's favorite papers from 2025, so I made a list of 16 #lipidtime studies from 2025 that I found interesting. Here they are in no particular order (please add more if you would like!), and here's to much more exciting science in 2026! 🧪

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Two weeks left to apply! If you study any area of metabolism or metabolic disease (broadly defined), we encourage you to apply. The dept is excited about biological and molecular mechanisms, metabolic flux, therapeutics, and physiology related to disease. aprecruit.berkeley.edu/JPF04710

Assistant Professor - Environmental Impact on Human Metabolic Disease - Nutritional Sciences and Toxicology

University of California, Berkeley is hiring. Apply now!

aprecruit.berkeley.edu

Excited to share my postdoc work @olzmannlab.bsky.social! We found lipid droplets, the cell’s lipid storage depots, are subject to oxidative damage and are protected by FSP1. Loss of FSP1 triggers droplet peroxidation and cell death, revealing a new layer of lipid quality control! shorturl.at/B5XYD

FSP1-mediated lipid droplet quality control prevents neutral lipid peroxidation and ferroptosis - Nature Cell Biology

Lange et al. identify a lipid droplet quality control pathway in which FSP1 safeguards stored neutral lipids from lipid peroxidation, thereby preventing the induction of ferroptosis.

nature.com