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Alejo Rodriguez-Fraticelli

@alejofraticelli.bsky.social
3.4K followers 1.6K following 153 posts

Aging and cancer stem cell heterogeneity - ICREA research professor - Quantitative Stem Cell Dynamics lab at IRB Barcelona 🇦🇷🇪🇺🇺🇸 fraticellilab.com

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Reposted by Alejo Rodriguez-Fraticelli
Federico Gaiti @fgaiti.bsky.social · 11/06/2026
Thanks to Diane Krause and the editors for the opportunity, and to the other authors @alejofraticelli.bsky.social @shalinhnaik.bsky.social in the clonal tracking series: doi.org/10.1182/bloo... We also recorded a podcast together—well worth a listen! bloodpodcast.transistor.fm/episodes/rev...
doi.org
Introduction to a review series on clonal tracking in hematopoiesis
Over the past decade, advances in single-cell genomics, lineage tracing, and computational phylogenetics have transformed our understanding of hematopoiesi
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 08/06/2026
Awesome!!!! Top of the read pile!
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Reposted by Alejo Rodriguez-Fraticelli
Roi Gazit @gazitroi.bsky.social · 08/06/2026
Erez, Omri, Pasha, Roshina, and Ofir Cohen find HSCs lack transplant potency during Salmonella infection. HSCs recover! Molecular data point to proliferation. We have a great opportunity to realize the exhaustion/regeneration of our own adult stem cells now. www.sciencedirect.com/science/arti...
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 21/05/2026
4-year expired scATACseq kit…. Worked like a charm.
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Nature Reviews Genetics @natrevgenet.nature.com · 18/05/2026
Complementing our recent #Review 'Charting single-cell lineages with synthetic and natural barcodes' by @alejofraticelli.bsky.social & Victoria Parreno (rdcu.be/e50gy), Kun Wang, Xionglei He & Zheng Hu review 'Computational approaches for multimodal lineage tracing': go.nature.com/4nDGGbk
go.nature.com
Computational approaches for multimodal lineage tracing - Nature Reviews Genetics
Multimodal lineage tracing links heritable ancestry with single-cell molecular states to reveal how cell fates emerge during development, regeneration and disease. In this Review, the authors survey k...
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Reposted by Alejo Rodriguez-Fraticelli
Mathieu Lupien @matlupien.bsky.social · 11/05/2026
Upcoming cancer epigenetics conference in Paris (Oct 13-16, 2026). Consider registering: www.atoutcom.com/cancer-epige...
atoutcom.com
Cancer Epigenetics
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 05/05/2026
Clone2vec finally published!!! Sweet new tech! I highly recommend it! Congrats Sergey et al!
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Reposted by Alejo Rodriguez-Fraticelli
ISEH - International Society for Experimental Hematology @isehsociety.bsky.social · 11/04/2026
Abstract submissions close 17 April. Don’t miss your chance to present at #ISEH2026! Share your science with the global ISEH community. 🔗 iseh.org/Annual-Meeti...
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Reposted by Alejo Rodriguez-Fraticelli
Mick Milsom @milsommick.bsky.social · 30/03/2026
First (to my knowledge) manuscript describing a correlation between number of infections and incidence of clonal hematopoiesis (CHIP). Really important from the perspective of highlighting a possible modifiable driver of CHIP during aging. @isehsociety.bsky.social www.exphem.org/article/S030...
exphem.org
Association of Infection Frequency and Incident Clonal Hematopoiesis of Indeterminant Potential
Clonal hematopoiesis of Indeterminant Potential (CHIP) is an age-related phenomenon characterized by clonal expansion of hematopoietic stem cells (HSCs)1. CHIP results from a fitness advantage conferr...
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Reposted by Alejo Rodriguez-Fraticelli
EMBL-EBI @ebi.embl.org · 25/03/2026
We’re recruiting new Research Group Leaders. We offer: 🔬 World-class IT infrastructure 🧠 Creative freedom for your research 📊 Access to the world’s most comprehensive open biological data Apply by 11 April embl.wd103.myworkdayjobs.com/en-US/EMBL/j... #ResearchCareers @johnlees.bacpop.org @embl.org
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Reposted by Alejo Rodriguez-Fraticelli
EMBO @embo.org · 24/03/2026
Apply now! The 2026 call for the EMBO Young Investigator Programme is now open with a deadline of 1 April 12:00 midday CEST. 🧪 More info here: www.embo.org/funding/fellowships-gr… #LifeSciences #research #funding
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Reposted by Alejo Rodriguez-Fraticelli
EMBO @embo.org · 24/03/2026
The EMBO Young Investigator Network consists of young investigators, installation grantees and global investigators. 🧪 Find more information on the individual programmes here: www.embo.org/the-embo-communities/e… #LifeSciences #research #funding
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Reposted by Alejo Rodriguez-Fraticelli
James Briscoe @jamesbriscoe.bsky.social · 23/03/2026
New work by @sagnera.bsky.social & co A conserved sequence of TFs: OC2 → Pou2f2 → Pou3f1 drives chronological diversification of spinal neuron subtypes across multiple cardinal domains Spinal neuron diversity is generated by integrating spatial & temporal programs www.science.org/doi/10.1126/...
science.org
Evidence for chronological diversification of spinal neuron subtypes by a shared sequence of transcription factors
Molecular and functional diversification of spinal cord output neurons by a conserved sequence of transcription factors.
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Reposted by Alejo Rodriguez-Fraticelli
Mick Milsom @milsommick.bsky.social · 20/03/2026
Come see all three receive their awards and talk about their science @isehsociety.bsky.social annual meeting in Frankfurt: iseh.org/Annual-Meeting Come for the science and join our community.
iseh.org
Annual Meeting
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Reposted by Alejo Rodriguez-Fraticelli
ME Torres-Padilla @metorrespadilla.bsky.social · 20/03/2026
Just out! 👀 for TFs that regulate TEs.Clara's work with @tamas-schauer.bsky.social @marliesoomen.bsky.social @palmrinmoy.bsky.social and bluesky-less lab members 🌎 identifies TBP as a regulator of specific ERVL class: MaLRs in 🐭embryos -as always -feedback welcome👍 link.springer.com/article/10.1...
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Reposted by Alejo Rodriguez-Fraticelli
Shannon McKinney-Freeman @smckinneyfreeman.bsky.social · 17/01/2026
Have you ever wondered about Pig HSCs? Today is your lucky day! Check out this excellent work from @ganuzalab.bsky.social. Well done! Pig and human adult hematopoietic stem and progenitor cells are overall transcriptionally similar. www.exphem.org/article/S030... @isehsociety.bsky.social
exphem.org
Pig and human adult hematopoietic stem and progenitor cells are overall transcriptionally similar
Allotransplantation provides a lifesaving treatment to hundreds of thousands of patients worldwide every year, including among others heart, kidney, liver and bone marrow (BM) transplants [1,2]. Yet, ...
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Reposted by Alejo Rodriguez-Fraticelli
Ganuza Lab @ganuzalab.bsky.social · 15/03/2026
www.nature.com/articles/s41... Extremely proud of our publication in @natcomms.nature.com. We report a genetic system based on synthetic Notch receptors (Yin&Yang) that we engineered to record and identify cell-to-cell interactions in vivo in the thymus. Collaboration @mirjana-efremova.bsky.social
nature.com
Unbiased recording and identification of thymic cellular interactomes using synthetic Notch receptors - Nature Communications
Interactions with haematopoietic and stromal cells in the thymus are essential for T cell development. Here, the authors develop an unbiased genetic system based on synthetic Notch receptors to label ...
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Reposted by Alejo Rodriguez-Fraticelli
Barbara Marte @barbmarte.bsky.social · 11/03/2026
new out in Nature www.nature.com/articles/s41...
nature.com
Ageing promotes metastasis via activation of the integrated stress response - Nature
Ageing reprograms the evolutionary trajectory of KRAS-driven lung adenocarcinoma, limiting primary tumour growth while promoting metastatic dissemination through epigenetic activation of the integrate...
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Reposted by Alejo Rodriguez-Fraticelli
Tobias Warnecke @tobiaswarnecke.bsky.social · 05/03/2026
Pls re-post: My department @oxfordbiochemistry.bsky.social are recruiting for several new faculty positions (links below). Broad search in molecular biology/biochemistry, across prokaryotes and eukaryotes. Interested in understanding life at the molecular level, this job might be for you! 1/n
my.corehr.com
Job Details
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 05/03/2026
It’s seriously impressive! Now that I’m reading it more in detail, I’m obsessed with this mechanism! So cool! Looking forward to celebrating soon!
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 04/03/2026
Amazing work Maria!!! Congrats!!!
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Reposted by Alejo Rodriguez-Fraticelli
Lars Velten @larsplus.bsky.social · 04/03/2026
Proud of @juruehle.bsky.social for getting her PhD paper on biorxiv! In it, we take synthetic enhancer screens to the single cell level, offering new insight into how transcription factors and enhancers interact 👀
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Reposted by Alejo Rodriguez-Fraticelli
James Briscoe @jamesbriscoe.bsky.social · 02/03/2026
New from @dev-journal.bsky.social: we're launching a new initiative and hiring Preprint Editors to help navigate the growing world of preprints in developmental & stem cell biology Join our community & shape the future of research journals.biologists.com/dev/article/...
journals.biologists.com
Preprint Editors – Development's next step into the preprint landscape
Summary: This Editorial announces a call for Preprint Editors in Development to help expand the journal's relationship with preprints by curating our ‘In preprints’ articles.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 28/02/2026
Absolutely loved it Thibaut. Mega congrats!!! What a story.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 28/02/2026
I still remember to this day how much this specific day, the day the genome draft was published, pushed me into choosing to study life sciences… it was a breakthrough moment for so many young kids. 25 years, wow.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 27/02/2026
Dot is unreal. I think I was completely unaware that editors could have such super-powers. I will never look at an editor job the same way ever gain.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 27/02/2026
👏🏻👏🏻👏🏻
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 27/02/2026
Big thanks to amazing (absolutely amazing) editor Dorothy Clyde and to reviewers @timcoorens.bsky.social and Show-wen Wang!!!! Your input and comments were absolutely crucial! Thanks for pushing us to make it the best we could.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 27/02/2026
INTERESTED IN SINGLE-CELL LINEAGE TRACING? Check our new review @naturerevgenet.bsky.social from the @alejofraticelli.bsky.social lab 🎉🎉 nature.com/articles/s41... With Victoria Parreno, we tried to update the modern manual for genetic tracing and clonal analysis. Read link: rdcu.be/e50gy
nature.com
Charting single-cell lineages with synthetic and natural barcodes - Nature Reviews Genetics
In this Review, Rodriguez-Fraticelli and Parreno discuss advances in single-cell lineage-tracing methods and how their application to diverse biological processes, such as development, ageing and canc...
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Reposted by Alejo Rodriguez-Fraticelli
IRB Barcelona @irbbarcelona.org · 27/02/2026
📢 The 5th edition of #ISCO – Innovation in #SingleCell #Omics is almost here! 🗓 28–29 May 2026 📍 @prbb.org  🚨 Early-bird deadline: 28 Feb Register: www.isco-conference.eu @crg.eu @carrerasijc.bsky.social @alejofraticelli.bsky.social
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Reposted by Alejo Rodriguez-Fraticelli
bioRxivpreprint @biorxivpreprint.bsky.social · 26/02/2026
Leukemia stem cell expansion cultures reveal clonal drivers of leukemogenesis and therapy response www.biorxiv.org/content/10.64898/20…
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Finally, and most crucially, I want to thank the funding from Cris Cancer Foundation, who believed that it was possible to transform cancer research with my crazy ideas. And also @erc.europa.eu and @ageinves.bsky.social for supporting our high-risk high-gain ideas.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
I want to finish by acknowledging the support of @irbbarcelona.org and @icreacommunity.bsky.social, one of the best institutes for biomedical research in Europe, and the amazing team of people working there, from #corefacilities to #administration, because they truly made this project a reality.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
We are now making PLSTC LSCs with other mutations, and modifying them (almost like a cell line) to perform experiments that seemed crazy just a few months ago (knock-ins, knock-outs, etc.). The genetic engineering possibilities may be endless. Get in touch if you'd like to set them up in your lab!
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Of course, this is one of those studies that offers more questions than answers, and we're quite happy with this! We believe PLSTCs can pave the way to accelerate discovery of novel targets to treat these aggressive leukemias.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
In sum, we believe that LSCs can occupy a wide variety of LSC-like states, with certain primitive-like states primed with expression of MegE genes and biased towards self-renewal. These states are somehow dependent on CS proteoglycans (Csgalnact1) and may be targeted by chABC.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Validating the CRISPR data, chABC treatment significantly delayed leukemia initiation. And, more importantly, it synergized with chemotherapy, making it harder for LSCs to come back after chemotherapy treatment (after drug washout).
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Csgalnact1 is the main enzyme responsible of initiating polymerization of chondroitin sulfate chains. Chondroitin-sulfate proteoglycans are main drivers of fibrosis in injury. Importantly, there is a therapy under research, Chondroitinase ABC, that can target this mechanism.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Leveraging these LSC-enriched PLSTC cultures, we used a CROPseq strategy (pioneered by @bocklab.bsky.social) to identify regulators for various LSC states. We identified Csgalnact1 as a potential novel regulator (and we also rediscovered Gapdh and Adgrg1/GPR56!).
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Next, modeling induction chemotherapy in vivo, we found that some LSC-biased clones tend to be more resistant, and these express higher levels of the megakaryocytic/erythroid markers. Shockingly, after therapy, these clones move to the spleen, and reinforce their megakaryocytic-erythroid flavor!!!
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Surprsingly, just like in normal HSCs, we find that there are LSC-biased clones, that have a preference for self-renewal and produce little mature AML progeny!!! These clones seem to express many markers of megakaryocytic-erythroid MPPs.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
In vivo, as reported by Huntly, Levine, and others, there is a wider variety of fate behaviors as these LSCs differentiate into different mature-like trajectories (all with some degree of monocytic progenitor differentiation, which is a hallmark of these AMLs).
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Some specific clonotypes appear to be hyper efficient at engraftment (LSC-3 group), though all could engraft at some rate. Using state-fate LARRY to select the most leukemogenic state, we find markers of Multipotent progenitors, but with HSC-like cell adhesion/ECM modules.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Tracing clonality, we find that PLSTC LSCs occupy a variety of stable, self-renewing states within the same well. So, this apparent continuum is actually made of thousands of clonal "constellations"!!!! Using @adameykolab.bsky.social super cool tool scLiTr, we can group these into 5 fate clusters.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
And, importantly, PLSTCs can be modified, selected, frozen, thawed, etc. just like a cell line (protocol paper will be submitted separately soon!). Of course, we thought this was a great opportunity to understand AML LSC clonal complexity. ENTER LARRYv3!
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Compared to classic StemSpan cultures, PLSTCs are highly sensitive to metabolic therapy (Venetoclax), and resistant to conventional chemotherapy (araC/Doxo), highlighting similarities with primitive leukemic cell states.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
And they found them. We call these PLSTCs ("Polymer-based Leukemia STem cell Cultures"). PLSTCs show a remarkable capacity to expand highly potent, primitive LSCs even after months in culture (with AML initiation in 20-30 days at < 100 cell doses).
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
Indra Singh @indrasingh.bsky.social led the project at the end of his PhD, and then it was taken to the finish line by postdoc Andrea Polazzi. This killer team took the challenge to find the most pure culture reagents to maintain aggressive AML LSCs, inspired by Wilkinson and Yamazaki labs.
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
This was a fantastic collaboration that started through tinkering and discussing about LSC cultures with Bobby Bowman @penncbio.bsky.social, leveraging fantastic new AML mouse models developed by @trowbridgelab.bsky.social and @rosslevinemd.bsky.social!
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Alejo Rodriguez-Fraticelli @alejofraticelli.bsky.social · 26/02/2026
🚨 NEW @FraticelliLab PREPRINT JUST WENT LIVE biorxiv.org/content/10.6... Here, we describe PLSTCs, Soluplus-based expansion cultures of primary mouse *Acute Myeloid Leukemia* Stem Cells. And then we use LARRY barcoding to identify drivers of leukemogenicity and drug resistance!
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