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Guillaume Andrey

@guandrey.bsky.social
506 followers 419 following 30 posts

Associate Professor - Developmental Genomics Website: andreylab.org

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Reposted by Guillaume Andrey
Evgeny Kvon @evgenykvon.bsky.social · 24/08/2026
The newly established Department of Systems Biology (systems.bio.uci.edu) @UCIrvine is hiring a tenure-track Assistant Professor in Systems Biology. Great science, incredible faculty support, and beautiful, sunny SoCal weather! ☀️🌴 Details: recruit.ap.uci.edu/JPF10377. Please share.
recruit.ap.uci.edu
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Charles Mullon @charlesmullon.bsky.social · 03/08/2026
Looking for an Associate Prof position? Interested in behavioural ecology & cultural evolution? Come join us at the Dpt of Ecology and Evolution in Lausanne🇨🇭 @dee-unil.bsky.social @unil.bsky.social! Great department & great place to live. Pls RP. Apply here: wwwfbm.unil.ch/releve/appli...
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Darío Lupiáñez @dariloops.bsky.social · 21/07/2026
🚨 Job Alert - Please share 🙏 Interested in 3D gene regulation in development & evolution? 🤓🧬 💥 Our lab at @cabd-upo-csic.bsky.social is expanding! ✅ 4 years fully funded PhD position 💻🧪 Experimental or computational backgrounds welcome 👇 Details below #PhDPosition #PhDOpportunity #AcademicJobs
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Luca Giorgetti lab @FMI @lucagiorgetti.bsky.social · 15/07/2026
Our preprint is now out in @natgenet.nature.com ! doi.org/10.1038/s415... We measured Sox2 promoter bursting dynamics with the SCR enhancer positioned at different distances within a genomic locus devoid of confounding effects in mESC: Main findings in the 🧵 below:
doi.org
Enhancer control of promoter activity and variability via frequency modulation of clustered transcriptional bursts - Nature Genetics
Tünnermann et al. use live-cell imaging to study promoter activity under the control of an enhancer inserted at different genomic distances. RNA production from the promoter occurs in clusters of tran...
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Guillaume Andrey @guandrey.bsky.social · 22/06/2026
It is an honor to present our research in such a temple of science. Looking forward to the visit and the discussions ahead. Thank you Renee Beekman for the invitation.
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Reposted by Guillaume Andrey
Claudio Cantù @claudiocantu81.bsky.social · 13/06/2026
FASTEN YOUR SEATBELTS: Tamina Weiss, inspired by previous data from @ppagella86.bsky.social found that beta-catenin is more than an adaptor protein downstream of #WNT It is an orchestrator that scouts and opens enhancers for transcriptional activation @biorxivpreprint.bsky.social
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Elphege Nora Lab at UCSF @elphegenoralab.bsky.social · 13/05/2026
Why can't we explain enhancer action despite 2 decades of chromosome conformation technologies? 😬 Our new study spearheaded by Leonid Mirny's group points to a flaw in our assumptions, and to a solution from physical principles By @timothyfoldes.bsky.social 💻& @karissalhansen.bsky.social 🧪 🧵👇
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Guillaume Andrey @guandrey.bsky.social · 14/05/2026
Congrats Patrick and team, very nice.
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Reposted by Guillaume Andrey
Denis Duboule @denisduboule.bsky.social · 07/05/2026
Pierre Chambon was a great scientist. And a good man too. He alone opposed to leading British embryologists during the evaluation of a case of scientific misconduct more than 40 years ago, to defend young scientists against an establishment to which he belonged. An unforgettable lesson. RIP Pierre 💐
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Elphege Nora Lab at UCSF @elphegenoralab.bsky.social · 23/04/2026
📖 The final version of our paper is out in press Cohesin cofactor dosage sets the rate of loop extrusion, rendering genome folding tunable yet vulnerable to genetic disruption authors.elsevier.com/a/1m%7EU03vV... or www.cell.com/molecular-ce...
cell.com
Cohesin cofactor dosage sets the rate of loop extrusion, rendering genome folding tunable yet vulnerable to genetic disruption
Shah, Tortora, et al. show that cells can dial the rate of cohesin loop extrusion by balancing the relative dosage of NIPBL and PDS5. Their models provide a quantitative mechanistic basis for the gene...
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Reposted by Guillaume Andrey
MRC Laboratory of Medical Sciences @mrc-lms.bsky.social · 16/04/2026
A new study shows how different regulatory genetic elements control when a key developmental gene is active in the body. The findings could explain subtle differences seen in patients with congenital limb malformations, for which the underlying disease mechanisms often remain unknown.
lms.mrc.ac.uk
Waves of regulation control an important developmental gene
In a new study published in Genes & Development, research led by Dr Lila Allou at the MRC Laboratory of Medical Sciences (LMS) in London and Professor Stefan Mundlos at the Max Planck Institute for Mo...
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Denis Duboule @denisduboule.bsky.social · 16/04/2026
This year, the annual symposium of my Chaire @college-de-france.fr will be on The Evolution of Developmental Mechanisms. An impressive lineup of speakers and weirds animals, including humans. Free entrance and coffee breaks. Come, have a seat, relax and enjoy the best possible basic science🤘RT🙏
Pictures from Fanny Martinez Real and Stefan Mundlos🙏
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Darío Lupiáñez @dariloops.bsky.social · 06/03/2026
🚨 Job Alert - Please share! 🙏 Interested in 3D gene regulation in development & evolution? 🤓🧬 💥 Our lab at @cabd-upo-csic.bsky.social is expanding! We’re recruiting: ✅ PhD students ✅ Postdocs 💻🧪 Experimental or computational backgrounds welcome 👇 Details below
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Darío Lupiáñez @dariloops.bsky.social · 24/02/2026
🤩💪 Out now! 3D regulatory hubs in sex determination With @mamartirenom.bsky.social & Capel labs, led by @imotagom.bsky.social & @jrotwitguez.bsky.social 1️⃣ METALoci – explore #3DGenome 🧬 2️⃣ Non-coding region controlling Fgf9 🧩 3️⃣ Meis genes = new key players 🌟 👉 rdcu.be/e5sm2 1/n Bluetorial 👇
rdcu.be
Chromatin spatial analysis by METALoci unveils sex-determining 3D regulatory hubs
Nature Structural & Molecular Biology - METALoci, a new three-dimensional genome computational tool, reveals a major rewiring of regulatory interactions during sex determination. By combining...
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Guillaume Andrey @guandrey.bsky.social · 24/02/2026
Glad to serve on the committee for such inspiring research. Bravo @unger-lucas.bsky.social 👏
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Reposted by Guillaume Andrey
George Monbiot @georgemonbiot.bsky.social · 23/02/2026
Brainwashing, 2026 edition. This paper shows how X's algorithmic feed shifts people's views rightwards. It's a sophisticated, highly effective form of reorientation. And it is utterly chilling. If you're still on that platform, unhook yourself now. www.nature.com/articles/s41...
nature.com
The political effects of X’s feed algorithm - Nature
Among users initially on a chronological feed, 7 weeks of exposure to X’s algorithmic feed in 2023 shifted political attitudes and account-following behaviour in a more conservative direction compared...
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Darío Lupiáñez @dariloops.bsky.social · 03/02/2026
🚨 1/ Preprint Alert! Sex determination outcome is conserved across vertebrates (i.e. generating 2 compatible sexes) ♀️♂️ But are the cell types and gene programs behind them conserved too? 🧬 Spoiler: not really 👀 Find out in our new preprint ⬇️ www.biorxiv.org/content/10.6...
biorxiv.org
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Denis Duboule @denisduboule.bsky.social · 15/02/2026
Very sad news. Gail Martin (1944-2026) was a figure in developmental biology. She pioneered the field of ES cells. A great colleague, a friend and a lovely person.
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Elphege Nora Lab at UCSF @elphegenoralab.bsky.social · 12/02/2026
Interested in transcriptional regulation, enhancers and 3D genome folding? In this new study we wondered about the role of cohesin loading at enhancers for long-range transcriptional control www.biorxiv.org/content/10.6... detailed 🧵👇
biorxiv.org
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Fany M. Real @fany-real.bsky.social · 11/02/2026
Happy International Day of Women and Girls in Science! #11F #NoMoreMatildas 🧑‍💻🧑‍🔬🧑‍🏫🧑‍🔧🧑‍⚕️
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Karolin Luger @nucleosomepolice.bsky.social · 07/02/2026
I love this portrait of a scientist so much. Portrait of Dr Bouchard, by Tamara de Lempicka, 1928
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Guillaume Andrey @guandrey.bsky.social · 13/01/2026
Thanks Justin!
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Guillaume Andrey @guandrey.bsky.social · 13/01/2026
Thanks Patrick!
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Martin Franke @martinfranke.bsky.social · 12/01/2026
🧬 We’re #Hiring a #Bioinformatician/ Computational Biologist! #Single-cell genomics, #Epigenomics & #3Dgenome biology in #Zebrafish #DevBio 🐟 📍 @cabd-upo-csic.bsky.social, CABD, Seville (Spain) 🕒 Full-time, 3-year position (start March 2026) 📅 Apply by Feb 15, 2026 👉 drive.google.com/file/d/1M8rp...
drive.google.com
Job offer 2026.pdf
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Raquel Rouco, PhD @raquelrouco.bsky.social · 12/01/2026
Did you ever wonder how gene expression, once activated, it's maintained for a precise period of time before being decommissioned? Happy to present the final version of our manuscript on the discovery of regulatory trajectories, just published in Nat. Comms: www.nature.com/articles/s41... 1/14
nature.com
Client Challenge
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
This finding raises fundamental questions about how regulatory landscape decommissioning shapes gene expression patterns and organogenesis in vivo. Is the silencing of transcription just as tightly regulated and important as its initiation in vivo? 11/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
Observing decommissioned cells in the distal limb led us to hypothesize that Hox13 induces Shox2 decommissioning. Consistently, overexpressing Hoxd13 in the Shox2 domain triggered Shox2 decommissioning and extensive HOXD13 binding at Shox2 enhancers. 10/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
In cells that have silenced Shox2 transcription, termed decommissioned cells, we observed a loss of enhancer-promoter (E-P) interactions and rapid decrease in H3K27ac at enhancers. 9/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
These findings demonstrate the relevance of early and late enhancer repertoires and open fundamental questions on how their activities are integrated to form complex gene expression pattern. 8/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
In contrast, removing late and common enhancers precludes the maintenance of Shox2 expression at late limb stage, increasing decommissioned Shox2 cells. 7/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
Removing 25% of early enhancers (7 out of 26) delays Shox2 transcription onset in limbs, yet levels normalize at later stages. 6/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
At the Shox2 locus, we've identified early, common, and late acting enhancers, also noting that their chromatin interactions with Shox2 align with their window of activity. 5/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
To our surprise, digits 4 and 5 first emerged from limb progenitors that transiently expressed Shox2, a gene controlling proximal limb bone formation, demonstrating that early limb progenitors can express proximal markers before repressing them and transitioning to a distal fate. 4/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
Using one of these genes, Shox2, as a model, we employed a recorder transgenic system, tracking cells through their active, inactive, and decommissioned (that have stopped to express Shox2) states over developmental time. 3/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
We've found that numerous limb loci have unique early and late enhancer repertoires. 2/n
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Guillaume Andrey @guandrey.bsky.social · 12/01/2026
Our work on #RegulatoryTrajectories is out today in Nat. Comms: www.nature.com/articles/s41... Led by @raquelrouco.bsky.social, this study establishes a new framework to study how enhancer landscapes act sequentially at developmental loci and are silenced to shape gene expression patterns. (1/n)
nature.com
Client Challenge
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Alex Stark @alex-stark.bsky.social · 24/12/2025
Our preprint "Predictive design of tissue-specific mammalian enhancers that function in vivo in the mouse embryo" is on bioRxiv: www.biorxiv.org/content/10.6... . Amazing collaboration by @shenzhichen1999.bsky.social, Vincent Loubiere (@impvienna.bsky.social,@viennabiocenter.bsky.social),... (1/2)
biorxiv.org
Predictive design of tissue-specific mammalian enhancers that function in vivo in the mouse embryo
Enhancers control tissue-specific gene expression across metazoans. Although deep learning has enabled enhancer prediction and design in mammalian cell lines and invertebrate systems, it remains uncle...
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Guillaume Andrey @guandrey.bsky.social · 08/12/2025
Another elegant study on the SWI/SNF complex from our wonderful neighbors in the Braun Lab. Congratulations to the team!
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Rada-Iglesias Lab @radaiglesiaslab.bsky.social · 06/11/2025
We recently reported that promoter competition can contribute to the robust insulation of gene regulatory domains (www.nature.com/articles/s41...). We now offer a 4-years PhD contract to investigate whether the dirsuption of this regulatory mechanism can lead to congenital defects. More details 👇
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Eric Topol @erictopol.bsky.social · 29/10/2025
Why fundamental research is fundamental to progress, seeding major breakthroughs Editorial @nature.com this week And 7 basic science discoveries that changed the world nature.com/articles/d41... nature.com/articles/d41...
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Daniel Ibrahim @danielibrahim.bsky.social · 16/10/2025
What is a promoter? And how does it work? We very happy to share our latest work trying to understand enhancer-promoter compatibility. I am very excited about the results of @blanka-majchrzycka.bsky.social, which changed the way I think about promoters www.biorxiv.org/content/10.1...
biorxiv.org
Enhancer-promoter compatibility is mediated by the promoter-proximal region
Gene promoters induce transcription in response to distal enhancers. How enhancers specifically activate their target promoter while bypassing other promoters remains unclear. Here, we find that the p...
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Luca Giorgetti lab @FMI @lucagiorgetti.bsky.social · 24/09/2025
Really excited to share our latest work led by @mattiaubertini.bsky.social and @nesslfy.bsky.social: we report that cohesin loop extrusion creates rare but long-lived encounters between genomic sequences which underlie efficient enhancer-promoter communication. www.biorxiv.org/content/10.1... A🧵👇
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Denis Duboule @denisduboule.bsky.social · 17/09/2025
Out today. 🙏 again to everyone for this wonderful piece of work, in particular to Aurelie @aurhin.bsky.social Chase @chasebolt.bsky.social and Brent @homeobox.bsky.social. 🙏 also to the Harris lab @fish4walking.bsky.social and @neilshubin.bsky.social @biology-unige.bsky.social @college-de-france.fr
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Alexis Verger 🧬🧫🧪 @alexis-verger.cpesr.fr · 28/08/2025
If you like transcription regulation and its mechanisms, this WIP list is for you. I'm sure I've forgotten lots of people, so don't hesitate to let me know so I can add you to the list. go.bsky.app/8vTgeXB
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Guillaume Andrey @guandrey.bsky.social · 29/08/2025
Thanks Alexis, I am very honoured.
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Jop Kind @jopkind.bsky.social · 10/07/2025
I am very excited to share our latest work where we describe a new method to profile genome-wide chromatin transitions over time in single cells. Great collaborative effort with the van Oudenaarden group @hubrechtinstitute.bsky.social @oncodeinstitute.bsky.social www.nature.com/articles/s41....
nature.com
Retrospective and multifactorial single-cell profiling reveals sequential chromatin reorganization during X inactivation - Nature Cell Biology
Kefalopoulou, Rullens et al. develop Dam&ChIC to assay chromatin state at two different time points in the same cell. The method was used to study the reorganization of LADs during cell division a...
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Guillaume Andrey @guandrey.bsky.social · 10/07/2025
Thank you very much!
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Axel Visel @axelvisel.bsky.social · 10/07/2025
Intriguing plot twist 🧐 Tissue-specific changes in 3D genome folding cause enhancer hijacking in Liebenberg syndrome But it’s NOT the overall expression level that drives the phenotype - it’s the proportion of cells hijacked into misexpressing Pitx1 that matters
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Guillaume Andrey @guandrey.bsky.social · 10/07/2025
Thanks 😀
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olimpiabompadre.bsky.social @olimpiabompadre.bsky.social · 09/07/2025
The final chapter of my Pitx1 adventure is out! 1 simple question:”How do SVs that shorten enhancer-promoter distance affect limb development?” We find the impact on transcription, cell populations, epigenetics, and chromatin structure. A labour of joy with @guandrey.bsky.social & all co-authors.
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