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Karreth Lab

@karrethlab.bsky.social
938 followers 713 following 42 posts

We study how melanomas progress and metastasize at Moffitt Cancer Center. Current focus on TFs and ncRNAs. Account managed by Florian.

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Karreth Lab @karrethlab.bsky.social · 03/04/2026
Pancreas is already plural. Pancrea is singular
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Karreth Lab @karrethlab.bsky.social · 19/02/2026
Congratulations 🎉🥳
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Karreth Lab @karrethlab.bsky.social · 12/02/2026
Yes!! The #melanoma community is the best!
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Karreth Lab @karrethlab.bsky.social · 12/02/2026
Who's the friend, I only see Vito... 😅 Love you, guys - thanks for what you're doing! 🤗
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Karreth Lab @karrethlab.bsky.social · 29/01/2026
Congrats! Moffitt is building a metabolism program and I suspect we will be recruiting next cycle again. Also, our new chair in Metabolism&Physiology may recruit next year to his drpartment
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Karreth Lab @karrethlab.bsky.social · 29/01/2026
Two papers accepted, one rejected in 2026. An eventful start to the year for the Karreth Lab
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Karreth Lab @karrethlab.bsky.social · 28/01/2026
Looking forward to that paper!!
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Chris Marine Lab @marinelab.bsky.social · 09/01/2026
🚀 New preprint! Meet ORIGAMI: Mapping cancer cell state heterogeneity and plasticity, predicting and steering therapy-induced trajectories to rationalize genotype-agnostic combination strategies with only two physical metrics (cell surface area and volume) www.researchsquare.com/article/rs-8...
researchsquare.com
Simple cell geometry metrics reveal cancer cell diversity and plasticity and guide combination therapy
Intra-tumour heterogeneity (ITH) and cellular plasticity contribute to therapy resistance. Single-cell transcriptomics is the gold standard for assessing ITH, but this approach remains costly and slow...
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Karreth Lab @karrethlab.bsky.social · 09/01/2026
This is great, congrats Chris and team!!
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bioRxiv Cancer Bio @biorxiv-cancer.bsky.social · 21/12/2025
Genetic Drivers of Sensitivity or Resistance to RAS(ON) Multi-Selective Inhibitors in NRAS-Mutated Melanoma www.biorxiv.org/content/10.64898/20…
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Karreth Lab @karrethlab.bsky.social · 05/10/2025
From the biology on melanocytes to pigmentation conditions and melanoma - we have it all! Join us in Tampa in March 2026 to learn the latest in the pigment cell field (and escape the cold) at the Annual Meeting of the Pan-American Society for Pigment Cell Research
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Karreth Lab @karrethlab.bsky.social · 04/10/2025
Interested in anti sense #RNA functions and their contribution to #melanoma formation? Check out our latest paper: CDH3-AS1 antisense RNA enhances P-cadherin translation and acts as a tumor suppressor in melanoma: Cell Reports www.cell.com/cell-reports...
cell.com
CDH3-AS1 antisense RNA enhances P-cadherin translation and acts as a tumor suppressor in melanoma
Chadourne et al. identify CDH3-AS1 as a downregulated antisense RNA in melanoma that enhances P-cadherin translation through a SINEUP-like mechanism. CDH3-AS1 overexpression suppresses melanoma growth...
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Karreth Lab @karrethlab.bsky.social · 09/09/2025
Maybe there are some ideas here: tasteofscience.org
tasteofscience.org
taste of science
An event series and festival for grown ups in your favorite places. Come feed your curiosity!
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Chris Marine Lab @marinelab.bsky.social · 09/09/2025
Just like there are good and bad macrophages..., there are good and bad NK cells!! This has profound therapeutic implications, far beyond oncology! Thanks to CD for highlighting both papers and the superb and efficient editorial work! Thanks to our collaborators (especially Zihai Li) and funders!
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Miranda Hunter @mrndhntr.bsky.social · 27/08/2025
My recent postdoctoral work is out today in @nature.com! We found that physical confinement makes melanoma cells more invasive and drug tolerant. Thanks to all who made this work possible @whitefishlab.bsky.social @mskcancercenter.bsky.social #NIH #NCI www.nature.com/articles/s41...
nature.com
Mechanical confinement governs phenotypic plasticity in melanoma - Nature
Mechanical confinement of cancer cells at the tumour–microenvironment interface induces phenotype switching through chromatin remodelling by HMGB2, leading to a more invasive and drug-resistant state ...
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Karreth Lab @karrethlab.bsky.social · 20/08/2025
Yes. 6th percentile. I haven't given up hope, council is next month. But I've already submitted it as a new app again
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Karreth Lab @karrethlab.bsky.social · 20/08/2025
With the NCI payline lowered to 4th percentile, this unfortunately did not age well
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Karreth Lab @karrethlab.bsky.social · 30/06/2025
Fundable R01 score 🥳
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Karreth Lab @karrethlab.bsky.social · 10/06/2025
Another preprint from our group. Here we show that FRA1 is a potent driver of #melanoma metastasis and inhibiting some of FRA1's transcriptional targets diminishes dissemination
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Karreth Lab @karrethlab.bsky.social · 07/06/2025
Preprint alert: check out our new genetically engineered mouse model of uveal melanoma, which recapitulates many aspects of the human disease including phenotypic plasticity
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Karreth Lab @karrethlab.bsky.social · 23/05/2025
Indeed, fucked we are
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Jeremy Berg @jeremymberg.bsky.social · 23/04/2025
ACTION ITEM-----ACTION ITEM Implementation of Schedule F This is what a lot of us have been worried about. This allows for many civil service positions to replaced with political appointees. This could include NIH institute directors and even POs. BUT THERE IS A COMMENT PERIOD... 1/n
media.tenor.com
the word alert is in a purple circle
ALT: the word alert is in a purple circle
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Karreth Lab @karrethlab.bsky.social · 14/03/2025
Gave a talk at the University of Louisville a few weeks ago and received this thank you gift in the mail today. My first Louisville Slugger - so cool!
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Fusion Conferences @fusionconf.bsky.social · 04/03/2025
We wrapped up our final day of #AMC25 on Saturday! Four days of insightful discussions, collaboration, & cutting-edge research. Grateful to everyone who joined us in DR to share insights, engage in conversations & foster collaborations. Until next time!🐭☀️🌴
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Karreth Lab @karrethlab.bsky.social · 03/03/2025
Not far at all! If you're down here and tired of cooking lemme know and Gina and I will take you to dinner
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Karreth Lab @karrethlab.bsky.social · 02/03/2025
I much prefer looking at food pics than reading the news these days, so thank you 😁
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Victor Ambros @vambros.bsky.social · 27/02/2025
I’ll be in DC March 7th at the StandUpForScience rally. See you there! If you can’t make it to DC there will be a StandUpForScience rally in a city near you. @standupforscience.bsky.social
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Karreth Lab @karrethlab.bsky.social · 25/02/2025
Aren't mice obligated nasal breathers? How would CPR work in that case?
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Karreth Lab @karrethlab.bsky.social · 22/02/2025
Anyone else use 'please' and 'thank you' when entering AI prompts? I hope my life will be spared when AI takes over...
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Karreth Lab @karrethlab.bsky.social · 20/02/2025
Some study sections seemed to have happened this week - one ND (R01) and a 7%ile (R21). But are June council meetings going to be on?
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Ardem Patapoutian @ardemp.bskyverified.social · 10/02/2025
Petition to Reverse the NIH Indirect Cost Cap initiated by Tom Maniatis. Please amplify Sign the Petition: chng.it/kK2HMP5pGk "Share with Leadership & Faculty. Reach out to professional societies, biotech and pharma leaders, and philanthropic organizations to raise awareness and mobilize support."
chng.it
Sign the Petition
Petition to Reverse the NIH Indirect Cost Cap (NOT-OD-25-068)
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Lydia Finley @lydiafinley.bsky.social · 04/02/2025
Massive work from Jess Spinelli's lab at UMASS demonstrating a SECOND electron carrier in the mammalian ETC: www.cell.com/cell/fulltex...
cell.com
Rhodoquinone carries electrons in the mammalian electron transport chain
Valeros et al. identify rhodoquinone (RQ), an electron carrier present in mammalian mitochondria, that can deliver electrons to fumarate instead of O2 as the terminal electron acceptor. The authors de...
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Karreth Lab @karrethlab.bsky.social · 21/01/2025
4 papers submitted - a busy start to the year. Let's hope 2025 won't be the year of rejections 😁
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Karreth Lab @karrethlab.bsky.social · 27/12/2024
More work is needed, but asRNA appear to be key regulators of mRNA translation, potentially to deal with secondary structures in the mRNA 5'UTRs.
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Karreth Lab @karrethlab.bsky.social · 27/12/2024
Ribosome profiling confirmed the effects of CDH3-AS1 on P-cad translation but also uncovered a global effect of asRNAs: transcripts, especially those with longer 5'UTR, that have an asRNA overlapping with the 5'UTR, are translated more efficiently.
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Karreth Lab @karrethlab.bsky.social · 27/12/2024
CDH3-AS1 increases P-cadherin without affecting CDH3 transcription, splicing, localization, or stability. CDH3 harbors secondary structures in its 5'region that reduce translation. CDH3-AS1 overlaps with this region and enhances P-cadherin translation.
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Karreth Lab @karrethlab.bsky.social · 27/12/2024
Like CDH3, CDH3-AS1 acts as a tumor suppressor, and we show the TS effects of CDH3-AS1 require CDH3/P-cadherin expression. CDH3-AS1 interacts with CDH3, preferntially when expressed in cis from a common locus.
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Karreth Lab @karrethlab.bsky.social · 27/12/2024
We profiled deregulated noncoding RNAs in melanoma cells and found hundreds of asRNAs. CDH3-AS1, the most downregulated asRNA, overlaps CDH3, which encodes P-cadherin and which is also robustly reduced in melanoma. Both CDH3-AS1 and CDH3 are suppressed my MAPK signaling.
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Karreth Lab @karrethlab.bsky.social · 27/12/2024
New preprint from the lab just posted to bioRxiv. Our first foray into antisense RNAs, led by postdoc Manon Chadourne, with implications for mRNA translation. Great collab with Alex Jaeger and his lab!
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Hunter Shain @shainlab.bsky.social · 14/12/2024
We are recruiting a postdoc to join our team (myself, Boris Bastian, and Iwei Yeh) at UCSF to develop a pre-cancer atlas of skin cancer -- part of the Human Tumor Atlas Network (#HTAN). #CancerEvolution #Bioinformatics. Interested? Email resume and cover letter to me.
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
There are a few unanswered questions, which we plan to address in follow up studies with recently awarded NCI funding. Neel graduated and will move on soon - if you are interested in carrying on this work as a postdoc in the lab, email me. We are hiring.
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
This was a fun project, and Neel was brave to take it on as it was our first foray into metabolic enzymes, even if we used our strengths to analyze PHGDH: signaling and mouse modeling.
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
This created a melanoma-specific metabolic vulnerability where melanoma cells can be starved of serine by combining dietary serine restriction with BRAF inhibitor-mediated reduction of PHGDH. This combo kills melanoma cells in vitro and reduces tumor growth in vivo.
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
He went on to delineate a MAPK-mTORC1-ATF-PHGDH regulatory pathway. Surprisingly, this pathway still controls PHGDH levels when melanoma cells are starved of extracellular serine (typically, this would turn on the integrated stress response pathway to regulate ATF4 and turn off mTORC1)
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
Using two genetically engineered mouse models, Neel showed that PHGDH is essential for melanomagenesis. He also noted that PHGDH is generally upregulated in melanoma cells compared to melanocytes. He hypothesized that this could be due to MAPK hyperactivation in melanoma cells.
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
The PHGDH gene, encoding the rate limiting enzyme of the serine synthesis pathway, is amplified in melanoma, making melanoma cells addicted to it. Neel wanted to know if PHGDH is important also in non-amplified melanoma cells.
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Karreth Lab @karrethlab.bsky.social · 29/11/2024
November has been busy, but I'm pleased to finally share our recent paper in Cancer Research: PHGDH Induction by MAPK is Essential for Melanoma Formation and Creates an Actionable Metabolic Vulnerability aacrjournals.org/cancerres/ar... Congrats to grad student Neel! A short 🧵 of what we found.
aacrjournals.org
PHGDH Induction by MAPK is Essential for Melanoma Formation and Creates an Actionable Metabolic Vulnerability
Abstract. Overexpression of PHGDH, the rate-limiting enzyme in the serine synthesis pathway, promotes melanomagenesis, melanoma cell proliferation, and survival of metastases in serine-low environment...
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Karreth Lab @karrethlab.bsky.social · 28/11/2024
Looks like expertly peeled, cored, and sliced apples and pears were used here
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Karreth Lab @karrethlab.bsky.social · 28/11/2024
Congrats Anna and team!
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Soragni:Lab @alice.soragnilab.com · 23/11/2024
We are hiring! We are looking for a Project Scientist to be in charge of the day-to-day operation of our tumor organoid pipeline. Come join our team of rare cancer aficionados looking to leverage organoids for functional precision medicine. Apply by November 24th! recruit.apo.ucla.edu/JPF09960
recruit.apo.ucla.edu
Project Scientist
University of California, Los Angeles is hiring. Apply now!
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