Sign in

Lyssiotis Lab

@lyssiotislab.bsky.social
4.3K followers 319 following 102 posts

Cancer and Immune Metabolism Research Laboratory, University of Michigan

PostsRepliesMedia
Reposted by Lyssiotis Lab
Nature Metabolism @natmetabolism.nature.com · 07/05/2026
RESEARCH | Y Shah, H Crawford, @lyssiotislab.bsky.social et al. (U of Michigan): Disruptions in NADPH-producing enzymes accelerate the formation of pancreatic precancerous lesions 🧪
dlvr.it
NADPH-producing enzymes restrict the formation of pancreatic precancerous lesions - Nature Metabolism
Temporal profiling of central carbon metabolism during KrasG12D-driven acinar-to-ductal metaplasia reveals that disruptions in NADPH-producing enzymes accelerate the formation of pancreatic precancerous lesions.
0106
Lyssiotis Lab @lyssiotislab.bsky.social · 14/04/2026
Thanks Federica 😊
010
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
7/ Congrats to leads: Dr Nneka Mbah & Damien Sutton! Thanks to collaborators, supporters, and funders 🙏
000
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
6/ In summary, while we potently induced ICD DAMPs in vitro, these did not translate to ICD in vivo. These findings suggest that, on balance, the effects of ferroptotic tumor cell death help to establish a tumor-protective, immune-tolerant microenvironment in murine PDAC.
110
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
5/ But ferroptosis released “brakes.” Metabolomic/lipidomic profiling revealed selective release of immunosuppressive metabolites & oxidized phospholipids. Conditioned media impaired T cells, and in vivo ferroptotic cells skewed tumors toward immunosuppressive myeloid enrichment w/ reduced T cells
100
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
4/ Maybe the Cys deprivation is inducing ferroptosis? Ferroptosis with GPX4 inhibition similarly elicited ICD-associated features, and these were reversed by Ferrostatin-1, linking cysteine deprivation → lipid peroxidation/ferroptosis → DAMP signaling.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
3/ Cys-deprived tumor cells also activated innate immunity in co-culture: they increased dendritic cell phagocytosis, maturation (e.g., MHCII/CD80/CD86), and pro-inflammatory cytokine production, all consistent with an ICD-like program. Evidence is mounting in support of a metabolic form of ICD!
100
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
2/ In a focused amino-acid dropout screen across syngeneic murine cancer cell lines, one hit stood out: cystine/cysteine restriction robustly induced multiple ICD hallmarks in vitro: canonical DAMPs like ecto-calreticulin, extracellular ATP, and HMGB1.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 13/04/2026
New study from the lab 🧵 1/ Pancreatic cancer is metabolically rewired and immunosuppressive. We asked: can targeting metabolism trigger immunogenic cell death (ICD) to boost anti-tumor immunity? Key twist: ferroptosis shows ICD signals in vitro, but is largely tumor-protective in vivo rdcu.be/fc55T
272
Lyssiotis Lab @lyssiotislab.bsky.social · 07/04/2026
Thanks Buddy!
000
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
11/ Huge congrats to lead author @radykm.bsky.social! She just started her own lab at @roswellpark.bsky.social (Buffalo, NY). Excited to see what’s next from her team. radyklab.org
radyklab.org
Radyk Lab
020
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
10/ Thanks Wellen Lab for the News & Views: “Metabolism modulates stress and neoplasia”. They synthesize both papers around a shared model: NADPH-producing enzymes constrain ROS and pancreatic neoplasia, while ROS→NRF2 signaling helps drive ADM. www.nature.com/articles/s42...
nature.com
Metabolism modulates stress and neoplasia - Nature Metabolism
Two studies published in Nature Metabolism show that dysregulation of specific metabolic enzymes within the pancreas leads to increased oxidative stress, which promotes pancreatic neoplasia in the pre...
111
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
9/ Co-published study from Vousden Lab identifies ALDH1L2 as acinar-enriched mitochondrial one-carbon NADPH enzyme, which also regulates ROS and ADM. ALDH1L2 loss elevates ROS, accelerates ADM/PanIN, and links to rising circulating formate as a PDAC biomarker. www.nature.com/articles/s42...
nature.com
ALDH1L2 regulates reactive oxygen species and acinar-to-ductal metaplasia in the pancreas - Nature Metabolism
In the early stages of pancreatic ductal adenocarcinoma (PDAC) development, loss of ALDH1L2 expression elevates reactive oxygen species levels, driving accelerated acinar-to-ductal metaplasia. Decreas...
111
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
8/ Notable experiments demonstrate antioxidant treatment (e.g. NAC or glutathione) dampens accelerated lesion formation ex vivo and in vivo. Conversely, weakening endogenous antioxidant capacity (e.g., glutathione depletion) promotes ADM in primary human acinar cells and increases lesions in mice.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
7/ Mechanism: our work supports a large body of work that oxidative stress is required for ADM, e.g. Vousden Lab, Storz Lab, DeNicola Lab, et al. Our key contributions are in identifying target enzymes and functions.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
6/ ME1 loss also increases oxidative stress and promotes ADM/PanIN, but with a key difference: Me1 loss accelerates malignant progression, with faster PDAC development over time. Same redox theme at initiation, distinct requirements once lesions evolve.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
5/ G6PD deficiency decreases oxidative PPP flux and increases oxidative stress markers. In KRAS-driven KC mice, it accelerates ADM and PanIN formation. But in KPC it doesn’t shorten survival, suggesting oxidative PPP/NADPH can be a brake early, without being the limiting factor later.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
4/ NRF2 target genes stoodout during ADM. Among them are NADPH-producing enzymes from two major routes: 1) G6PD (oxidative PPP) 2) ME1 (cytosolic malic enzyme) We asked whether these NADPH “buffers” actively restrain oxidative-stress–driven neoplasia.
110
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
3/ We started with a time course of primary acinar cells undergoing KRAS-driven ADM, with paired transcriptomics + metabolomics. Transcripts and metabolites shift together, revealing dynamic remodeling of central carbon metabolism and antioxidant pathways as acinar identity is lost.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
2/ ADM is a reversible wound-healing state after pancreatic injury. But w/ oncogenic KRAS (in >90% of PDAC), ADM can persist, transform into PanIN, and sometimes PDAC. Many PanINs persist for years/decades, so understanding what governs initiation vs progression is key Fig ref: Chuvin, et al CMGH
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
1/ We map metabolic rewiring during the earliest stage of pancreatic cancer transformation (acinar-to-ductal metaplasia, ADM) and show that NADPH/redox buffering acts as a barrier to early lesion formation with stage-specific differences that matter for progression. www.nature.com/articles/s42...
nature.com
NADPH-producing enzymes restrict the formation of pancreatic precancerous lesions - Nature Metabolism
Temporal profiling of central carbon metabolism during KrasG12D-driven acinar-to-ductal metaplasia reveals that disruptions in NADPH-producing enzymes accelerate the formation of pancreatic precancero...
100
Lyssiotis Lab @lyssiotislab.bsky.social · 06/04/2026
🚨New @lyssiotislab.bsky.social paper led by @radykm.bsky.social in @NatureMetabolism "NADPH-producing enzymes restrict the formation of pancreatic precancerous lesions" 🧵Follow for a tweetorial... and bonus highlight of Vousden Lab co-published study and News & Views link from Wellen Lab!
2166
Lyssiotis Lab @lyssiotislab.bsky.social · 22/01/2026
I do! Thanks to @megankillian.bsky.social Email me and I’ll forward. clyssiot@umich.edu
010
Reposted by Lyssiotis Lab
Eric Topol @erictopol.bsky.social · 22/01/2026
The Shingles vaccine has outperformed all expectations. Why? erictopol.substack.com/p/spotlight-...
5400118
Lyssiotis Lab @lyssiotislab.bsky.social · 22/01/2026
Your email = life saver. TY so much🙏😊
010
Lyssiotis Lab @lyssiotislab.bsky.social · 22/01/2026
🙌🏼 TY so much! I have since found out that other html tricks also apply.
000
Reposted by Lyssiotis Lab
Dr. Becca @docbecca.bsky.social · 20/01/2026
Just spoke to The Hill about how the dismantling of the NIH is impacting science in America. We still face a cliff of unfathomable heights, w easily 1000+ labs poised to close in the next year due to funding ending. A generation of young scientists lost because there is nowhere for them to train.
3248120
Lyssiotis Lab @lyssiotislab.bsky.social · 21/01/2026
Who is loving (the wasted hours) reformatting their Biosketch in sciENcv?! 🙋‍♂️ The formatting is atrocious. Anyone identify hacks to make it more palatable?
331
Reposted by Lyssiotis Lab
Gina DeNicola @ginadenicola.bsky.social · 06/01/2026
Interested in stable isotope infusions but daunted by jugular catheter surgery? New from postdoc @kimyumi0201.bsky.social: our simple tail vein catheter method enables anesthesia-free infusions in awake, freely moving mice. 🧵
21710
Reposted by Lyssiotis Lab
Oded Rechavi @odedrechavi.bsky.social · 15/10/2025
Here's the link to the system, try it! qedscience.com @qedscience.bsky.social
qedscience.com
q.e.d Science
Critical Thinking AI for constructive criticism and science evaluation
1720467
Reposted by Lyssiotis Lab
Nature Metabolism @natmetabolism.nature.com · 29/09/2025
#NatMetabPicks | In @nature.com led by @danwahlmd.bsky.social‬ @lyssiotislab.bsky.social @dnagrathlab.bsky.social WN Al-Holou ( @umich.edu ) Gliomas take up serine from the tumor microenvironment, and can be targeted with dietary serine restriction. 🧪 www.nature.com/articles/s41...
nature.com
Rewiring of cortical glucose metabolism fuels human brain cancer growth - Nature
The cortex fuels essential physiological processes with glucose-derived carbon, while gliomas fuel their aggressiveness by rerouting glucose carbon pathways and scavenging alternative carbon sources such as environmental amino acids, providing a potential therapeutic target.
161
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
🔗 Check out the full preprint for details & beautiful figures: www.biorxiv.org/content/10.1... 👏 Congrats to Narges and teams! 🙏 To our awesome collaborators! cc: @UMPhysiology
biorxiv.org
000
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
10/ Key message Aspartate aminotransferases (GOT1 & GOT2) are essential for red cell development—primarily through their link to chromatin modification (epigenetic regulation), not just metabolism or aspartate pools!
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
9/ Human cell relevance In primary human blood progenitors, knocking out GOT1/2 also blocked RBC formation & increased cell death, mirroring mouse results.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
8/ Clue: Epigenetics! 🧬 GOT1/2 deletion caused abnormal chromatin histone methylation in erythroid cells, suggesting an epigenetic block to development. Loss of GOT1/2 activates apoptosis & cell cycle arrest genes.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
7/ Bringing in a tissue-specific, LbNOX mouse model, we then demonstrated that correcting NADH reductive stress didn’t rescue the anemia. So MAS/redox was not the mechanism!
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
6/ Is it about redox? 🔴⚫ GOT1/2 are part of the malate-aspartate shuttle (MAS), which balances NAD+ and NADH. But deleting another MAS enzyme, MDH1, didn't cause anemia. 🤔
110
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
5/ Got1 vs. Got2 Surprisingly, Got1 or Got2 loss both caused anemia, but altered aspartate in opposite directions: GOT2 loss: ↓ aspartate GOT1 loss: ↑ aspartate Both led to a block in red blood cell maturation—so, not just about aspartate levels!
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
4/ Approach Narges, et al. deleted GOT1 or GOT2 globally or in erythroid cells in mice. Loss of either enzyme — or both — led to anemia and blocked red cell development at early progenitor stages.
110
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
3/ Background RBCs are constantly replenished (~200B/day), but the metabolic needs of this process are unclear. Profiling shows: Aspartate rises during erythropoiesis. Does aspartate metabolism drive red cell formation? 🤔
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
2/ Working with the @YatrikShahLab and Khoriaty labs, Narges discovered a previously unrecognized, critical role for aspartate aminotransferases (GOT1 & GOT2) in red blood cell (RBC) production, with implications for anemia therapy.
100
Lyssiotis Lab @lyssiotislab.bsky.social · 25/09/2025
Excited to share a new story from the Lab! 🚨🩸 🧵 1/ Aspartate transaminases control blood development, by Narges Pourmandi, et al www.biorxiv.org/content/10.1...
biorxiv.org
Aspartate transaminases are required for blood development
Red blood cells (RBCs) have a limited lifespan of approximately 120 days. This necessitates continuous RBC production, resulting in ∼200 billion new RBCs made per day to maintain oxygen delivery. Desp...
141
Reposted by Lyssiotis Lab
The New York Times @nytimes.com · 25/09/2025
In @nytopinion.nytimes.com The Trump administration’s autism project “is built on the premise that an autism diagnosis is a terrible tragedy and that scientists and doctors have failed,” Roy Grinker, a cultural anthropologist and the father of an autistic child, says. “But science has not failed.”
nyti.ms
Opinion | Autism Has Never Been One Thing
We’ve come too far to go back to a time when autism was defined solely in terms of deficits and mothers were made to feel guilty.
1411418
Reposted by Lyssiotis Lab
Dan Wahl @danwahlmd.bsky.social · 06/09/2025
New discovery from our team defining how human brain cancers rewire the metabolism of the normal brain published this week @nature.com and led by stellar postdoc Drew Scott (comentored by @lyssiotislab.bsky.social and currently on job market with a K99/R00). www.nature.com/articles/s41...
nature.com
Rewiring of cortical glucose metabolism fuels human brain cancer growth - Nature
The cortex fuels essential physiological processes with glucose-derived carbon, while gliomas fuel their aggressiveness by rerouting glucose carbon pathways and scavenging alternative carbon sources s...
34213
Lyssiotis Lab @lyssiotislab.bsky.social · 05/09/2025
Thanks for the hype! 🙏🏼
000
Reposted by Lyssiotis Lab
Waggoner Lab @labwaggoner.bsky.social · 03/09/2025
Glioblastoma depends on the amino acid serine as a fuel source & serine-deficient diet slows tumor growth in mice @nature.com @dnagrathlab.bsky.social @lyssiotislab.bsky.social www.nature.com/articles/s41... www.nature.com/articles/d41... www.nature.com/articles/d41...
292
Reposted by Lyssiotis Lab
Christian Frezza @frezzalab.bsky.social · 04/09/2025
Rewiring of cortical glucose metabolism fuels human brain cancer growth www.nature.com/articles/s41... Congrats to the many involved, including @lyssiotislab.bsky.social and @dnagrathlab.bsky.social
nature.com
Rewiring of cortical glucose metabolism fuels human brain cancer growth - Nature
The cortex fuels essential physiological processes with glucose-derived carbon, while gliomas fuel their aggressiveness by rerouting glucose carbon pathways and scavenging alternative carbon sources s...
1165
Reposted by Lyssiotis Lab
Ananya Sen @ana-sen.bsky.social · 04/09/2025
A massive team effort by U-M researchers have found that glioblastoma cells rewire how they use sugar, which can be targeted in mice to slow tumor growth and improve treatment responses. @lyssiotislab.bsky.social @dnagrathlab.bsky.social Learn more: michmed.org/MD2X2.
michmed.org
Dietary changes could provide a therapeutic avenue for brain cancer
A team of researchers from Michigan Medicine tracked how glucose is used in glioblastoma tumor cells. They showed that dietary interventions can slow brain cancer growth in mice.
164
Reposted by Lyssiotis Lab
Caitlin Gilbert @caitlingilbert.bsky.social · 28/08/2025
Three senior leaders who resigned in protest told The Post they were asked to participate in an unscientific vaccine recommendation process that they believe could harm the health of Americans. More from @lenasun.bsky.social @laurenweberhp.bsky.social @davidovalle.bsky.social 🎁: wapo.st/46aNJB0
wapo.st
CDC leaders who resigned said RFK Jr. undermined vaccine science, risking lives
As the CDC reels from departures, White House appoints Jim O’Neill as acting director.
14529
Reposted by Lyssiotis Lab
Caroline Bartman @cbartman.bsky.social · 29/08/2025
Ok so does anyone know anything about the NSF GRFP? Has anyone made any statement? Grad students keep telling me they’re writing it and I’m like discouraging them from spending time on this…. But do we have any actual information?
4124