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Claire Dessalles

@clairedessalles.bsky.social
1.5K followers 1K following 38 posts

Postdoc @RouxLab.bsky.social investigating topological defects and morphogenesis. PhD was on tensile stresses and endothelial cells.

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Reposted by Claire Dessalles
Oriol Mañé Benach @oriolmb.bsky.social · 24/09/2026
Very excited to finally share NeMo! 🌀🐟 Such a cool tool for anyone working with curved surfaces, and especially curved nematics. Really happy to have been part of this project and great team! arxiv.org/abs/2609.12906
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Benoit Ladoux @bladoux.bsky.social · 23/09/2026
What determines how epithelial cells divide when shape cues disappear? Our new work in @natcomms.nature.com shows that divisions follow maximal stress anisotropy — a “principal-stress rule” beyond Hertwig’s long-axis rule. Fantastic work led by @luanger.bsky.social www.nature.com/articles/s41...
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Claire Dessalles @clairedessalles.bsky.social · 23/09/2026
NeMo is finally out! 🐟 We present our new method to peel cellular layers and extract their nematics. If you're wondering what a fish has to do with curved nematics, check out the thread and the publication 👀👇🏼 arxiv.org/html/2609.12...
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epithelial mechanics fan club @epimechfc.bsky.social · 09/09/2026
Rembert, N., Dedenon, M., Roux, A., & Dessalles, C. A. (2026). Nematic order in cellular tissues: a standardized framework and anomalous defect dynamics. Biophysics. #EpithelialMechanics www.biorxiv.org/content/10.6...
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Julia Eckert @juliaeckert.bsky.social · 12/09/2026
From cell signaling to collective tissue dynamics, our community is sharing incredible research! 🔬 Thanks to everyone! Want to become an @epimechfc.bsky.social delegate and share your passion for science with us? Reach out and let us host your next thread.🧵 👉 epithelialmechanics.github.io/threads/
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bioRxiv Biophysics @biorxiv-biophys.bsky.social · 29/08/2026
Curvature-guided chiral collective organization of myoblast tissues www.biorxiv.org/content/10.64898/20…
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Kate Cavanaugh @katecavanaugh.bsky.social · 25/08/2026
🧵 What if one reason fertility declines with age isn’t just genetic-but mechanical? Thrilled to share our new paper in @NatureCellBio : Elevated contractility drives implantation failure in mouse embryos from aged females… here’s what we found 👇 www.nature.com/articles/s41... 1/11
nature.com
Elevated contractility drives implantation failure in mouse embryos from aged females - Nature Cell Biology
Cavanaugh et al. show that embryos from aged mice have increased contractility and tissue viscosity on embryonic day 4.5, which leads to poor spreading and attachment. Similar age-associated mechanica...
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Kate Cavanaugh @katecavanaugh.bsky.social · 25/08/2026
And finally—a bit of personal news: 🔬 I’m on the faculty job market this year! I’m looking for tenure-track opportunities where I can build a lab at the intersection of developmental biology, mechanobiology, reproductive biology & aging.
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Joshua Tran @joshuatran.bsky.social · 27/07/2026
💡New Preprint! How does a cell control which way a membrane bends? ESCRT-III has the remarkable ability to reshape membranes and drive reverse-topology fission, yet a fundamental question has remained: what determines the direction of membrane remodeling? www.biorxiv.org/content/10.6...
biorxiv.org
Direction of ESCRT-III-dependent membrane bending emerges from bilayer asymmetry
In cells, ESCRT-III is unique in mediating fission of membrane necks from inside, a process called reverse-topology fission. Yet, in vitro, the complex primarily assembles outside membrane necks and m...
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Roux Lab, Geneva @rouxlab.bsky.social · 12/05/2026
@mhakala.bsky.social shows that HRS forms bidimensional condensates onto endosomal membranes to flatten clathrin/ESCRT-0, an observation unexplained since the 2000s. Thx to Kukulski lab, @stefvass.bsky.social @colomlab.bsky.social @kaksonen.bsky.social @mishakudryashev.bsky.social rdcu.be/fihKk
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Claire Dessalles @clairedessalles.bsky.social · 29/04/2026
Plenty of opportunities for talks, especially for early career! Don't hesitate to send an abstract!
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Raphaël Clément @raphclement.bsky.social · 29/04/2026
The division Physics and Life of the French Physical Society (SFP) organizes its fourth annual meeting in Lyon, July 9th & 10th! Join us and register here: phys-life-2026.sciencesconf.org Abstract submission deadline: May 30th
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Oriol Mañé Benach @oriolmb.bsky.social · 24/04/2026
Very nice work from colleagues on the nematic organization of cellular tissues👇 Great to see such a clear focus on how parameter choices influence the analysis and the conclusions we draw, together with a detailed look at defect behavior across cell types!
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Claire Dessalles @clairedessalles.bsky.social · 22/04/2026
All you ever wanted to know about how to analyse the nematic nature of cellular tissues is right here 👀👇🏼! Bonus #1: we did it for many cell types and uncovered unexpected defect behavior 🐌 Bonus #2: for theoreticians looking for parameter values for your simulation🧑🏼‍💻 tinyurl.com/2s399yen
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Claire Dessalles @clairedessalles.bsky.social · 22/04/2026
All you ever wanted to know about how to analyse the nematic nature of cellular tissues is right here 👀👇🏼! Bonus #1: we did it for many cell types and uncovered unexpected defect behavior 🐌 Bonus #2: for theoreticians looking for parameter values for your simulation🧑🏼‍💻 tinyurl.com/2s399yen
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Alfredo Sciortino @asciortino.bsky.social · 02/04/2026
New preprint out: arxiv.org/pdf/2604.01057 Together with JF Joanny and Sudipta, we introduce a "new" kind of active phase separation inspired by experiments with motors and microtubules and based on transport of species along a polar "pump"! @manuelthery.bsky.social @lblanchoin.bsky.social
arxiv.org
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Zachary Gao Sun @thezgs.bsky.social · 25/02/2026
So proud of my amazing previous colleague at Yale, Sheng Chen and all the colleagues for this paper on topological control of spontaneous failure in active nematic solids! It's on @natmater.nature.com . www.nature.com/articles/s41...
nature.com
Topological control of spontaneous failure in active nematic solids - Nature Materials
Topological defect quadrupoles orchestrate predictable failure patterns in active nematic solid networks.
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GdR ImaBio 🔬 @gdrimabio.bsky.social · 12/03/2026
The @gdraqv.bsky.social "Approches Quantitatives du Vivant" is organizing its annual conference, "AQV Days 2026". 🗓️ From the 11th to 13th May 📍 At the @cnrs.fr centre of Aussois (Savoie) 👉 registration, and other practical information : 🔗 aqv-days-2026.sciencesconf.org/%60 #AQVDays2026
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Siegenthaler Lab @siegenthalerlab.bsky.social · 26/02/2026
Saw a few papers recently in CNS injury using transgenic lines to target 'pericytes' in the CNS & broad markers that are not specific, also label fibroblasts - imprecise tools & language = assigning functions in fibrosis to pericytes when other cells like fibroblasts are primarily involved 1/4
media.tenor.com
a drawing of a stick figure next to a soap box
ALT: a drawing of a stick figure next to a soap box
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epithelial mechanics fan club @epimechfc.bsky.social · 06/02/2026
Espadas, J., Souza, D. P., Hakala, M., García-Arcos, J. M., Tran, J., Kumar, A., Marcuello, C., Merino, A., ..., Toret, C. P., & Roux, A. (2025). Molecular basis for cellular compartmentalization by an ancient membrane fission mechanism. bioRxiv. #EpithelialMechanics buff.ly/OQv9qMw
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Claire Dessalles @clairedessalles.bsky.social · 20/01/2026
Glad to see this project out! Huge effort of all and in particular Guillaume for the 3D segmentation of cells. 👏 If you are interested in how cells pack themselves in 3D, please check it out 👀 👇
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Turlier lab @turlierlab.bsky.social · 20/01/2026
How does a ball of cells become an embryo? Genes matter—but physics (forces, geometry, topology) drives self-organization. Hervé Turlier's research vision on the physics of embryogenesis👇 shorturl.at/761x9 #Embryogenesis #Biophysics #Morphogenesis @college-de-france.fr @cnrsbiologie.bsky.social
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Claire Dessalles @clairedessalles.bsky.social · 20/01/2026
Multiscale curvature!
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bioRxiv Biophysics @biorxiv-biophys.bsky.social · 15/01/2026
Analysis of 3D epithelial tissue packing reveals correlated patterns of cell height and skewing www.biorxiv.org/content/10.64898/20…
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epithelial mechanics fan club @epimechfc.bsky.social · 14/12/2025
Cells can sense the geometry of their environment, from tiny subcellular features to whole-tissue patterns. How can we engineer environments to systematically probe these responses? 🧵 I'm @lhinderling.bsky.social from @olivierpertz.bsky.social lab, let’s do a short tour on microfabrication!
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Julia Sero @cellmorphosero.bsky.social · 04/12/2025
If you or your trainees are just getting started with image analysis of cells & are #CellProfiler -curious, here is a fairly thorough walk-through demo I did recently. Loading files, extracting metadata (fun with Regex!), identifying objects, measuring, filtering, QC, exporting: youtu.be/fO5nJdhj_7I
youtu.be
Introduction to CellProfiler - by a biologist, for biologists!
YouTube video by CellMorphoJSero
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Dan 🐟 C @zebrafish007.bsky.social · 02/12/2025
Exciting new #Zebrafish research from the #WeinsteinLab, led by Jong Park! “Specialized gas-exchange endothelium of the zebrafish gill” — www.biorxiv.org/content/10.6... Amazing to see red blood cells moving through the gills! Don’t forget to check out the supplemental movies ;-)
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Ricard Alert Zenón @ricardalert.bsky.social · 02/12/2025
New preprint! Do you like ocean waves? We found similar waves on bacterial colonies! We found that this collective behavior, known as rippling, is nothing but surface waves on an active nematic. @princeton.edu @mpipks.bsky.social @ub.edu @icreacommunity.bsky.social www.biorxiv.org/content/10.1...
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Ricard Alert Zenón @ricardalert.bsky.social · 02/12/2025
Super excited to start as an ICREA Research Professor at the University of Barcelona! Really happy to join fantastic colleagues at @icreacommunity.bsky.social and @ub.edu. www.icrea.cat/community/ic...
icrea.cat
ICREAs Fitxa - ICREA
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Claire Dessalles @clairedessalles.bsky.social · 02/12/2025
📢Internships on cellular nematics! 🔬Come for the pretty images, stay for the cool physics: each project combines in vitro experiments with advanced microscopy and image analysis. 📧Feel free to DM or email me with any questions.
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Juanma García-Arcos @juanmagararc.bsky.social · 27/11/2025
New paper from the @rouxlab.bsky.social on Nature Communications! We study how membrane tension is spatially organized in cells. Using the mechanosensitive probe Flipper-TR to visualize tension across the plasma membrane of adherent cells and to dissect the conditions needed for a gradient to happen
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Benoit Ladoux @bladoux.bsky.social · 02/12/2025
Tissue stress measurements — our latest preprint is out: arxiv.org/abs/2512.00550 (publication coming soon!) Fantastic work by the three musketeers — @luanger.bsky.social, @andreasschoenit.bsky.social and @fanny-wodrascka.bsky.social — in collaboration with P. Marcq!
arxiv.org
Tissue stress measurements with Bayesian Inversion Stress Microscopy
Cells within biological tissue are constantly subjected to dynamic mechanical forces. Measuring the internal stress of tissues has proven crucial for our understanding of the role of mechanical forces...
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Javier Espadas @javierespadas.bsky.social · 01/12/2025
New preprint from the lab!!🎉 We show that Asgard archaea ESCRT-III proteins can trigger membrane fission and reveal its molecular mechanism, offering clues to how these cells may have built internal compartments. But do these organisms even have these compartments? www.biorxiv.org/content/10.1...
biorxiv.org
Molecular basis for cellular compartmentalization by an ancient membrane fission mechanism
The emergence of cell compartmentalization depends on membrane fission to create the endomembrane compartments. In eukaryotes, membrane fission is commonly executed by ESCRT-III, a protein complex con...
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Cécile Michaut @cecilemichaut.bsky.social · 01/12/2025
Vous faites des études de physique mais vous ne savez pas quel métier faire ? J'ai rédigé pour la Société française de physique @sfp-physique.bsky.social une description de nombreux métiers accessibles, à travers les témoignages de celles et ceux qui les exercent. www.metiersdelaphysique.fr
metiersdelaphysique.fr
Métiers de la physique
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epithelial mechanics fan club @epimechfc.bsky.social · 15/11/2025
Hi, I’m David Brückner @davidbrueckner.bsky.social. I’ll take you through how cells in a tissue can use information distributed by biochemical gradients to make decisions, and how we can measure such positional information. buff.ly/RFxVeHh
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Pau Guillamat @pauguillamat.bsky.social · 12/11/2025
Microfluidic pumping with active nematics! Self-organized and self-sustained. No external pumps. @pnas.org @ub.edu www.pnas.org/doi/10.1073/... #ActiveMatter #Microfluidics #SoftMatter
pnas.org
Active nematic pumps | PNAS
Microfluidics involves the manipulation of flows at the microscale, typically requiring external power sources to generate pressure gradients. Alte...
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Juanma García-Arcos @juanmagararc.bsky.social · 11/11/2025
Launching celldynamicslab.com, the homepage of our new group at EPFL working on cell fragmentation, membrane and cortex mechanics, FLIM imaging, and microfluidics tools. MSc/PhD or postdocs interested in quantitative cell biology are welcome to reach out. We're also hiring a lab manager in 2026!
celldynamicslab.com
Main - Cell Dynamics and Fragmentation Lab
The Cell Dynamics and Fragmentation lab at We study how single cells move and fragment in complex environments using microfluidics. We bring tools and concep...
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Hao Yin @haoyin.bsky.social · 28/10/2025
Amazing story 😍 Just scan through it. Sophisticate, delicate and elegant 💥 Will read it in details again when time allows😋
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Campàs Lab @campaslab.bsky.social · 28/10/2025
Really excited to present the results of a fantastic collaboration with Jesse Veenvliet @jesseveenvliet.bsky.social @mpi-cbg.de @poldresden.bsky.social 🤩 We find a unique mechanism for body axis elongation in mammals, different from other vertebrate species ➡️ www.biorxiv.org/content/10.1...
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epithelial mechanics fan club @epimechfc.bsky.social · 24/10/2025
Borges, A., Miranda-Rodriguez, J. R., Ceccarelli, A., Ventura, G., Sedzinski, J., Lopez-Schier, H., & Chara, O. (2025). ForSys: non-invasive stress inference from time-lapse microscopy. iScience, 28, 113685. #EpithelialMechanics buff.ly/jQ96TCK
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Gautam Dey @gautamdey.bsky.social · 04/10/2025
If you’re applying to your dream lab for an internship/PhD/postdoc, always send a second email 1-2 weeks after the first one if you don’t hear back. I promise we will be grateful rather than annoyed. My email inbox is a disaster and I’m quite junior - and very few of us have secretarial support
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Miki Ebisuya @ebisuyamiki.bsky.social · 08/10/2025
New preprint from the lab! We discovered a transient fluidization in the basal region of human forebrains by tracking microdroplets in cerebral organoids.This “basal fluidization”, absent in gorilla and mouse, may contribute to greater surface expansion in human forebrains 1/ doi.org/10.1101/2025...
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Joachim Goedhart @joachimgoedhart.bsky.social · 26/09/2025
Fluorescence lifetime estimation: a practical approach using Flipper-TR FLIM by Juan Manuel Garcia-Arcos and team: www.biorxiv.org/content/10.1...
Frequency dependence of fast-lifetime FLIM and fits for C2C12 cells.
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Spirochrome @spirochrome.com · 07/10/2025
An incredibly comprehensive and meticulous study of Flipper-TR lifetime analysis to make your membrane tension measurements using Flipper-TR more robust and reliable. Thanks to @juanmagararc.bsky.social and @rouxlab.bsky.social for this very valuable resource!
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Claire Dessalles @clairedessalles.bsky.social · 07/10/2025
All you've ever wanted to know about FLIM analysis (and its application in Flipper-TR)!😱🤩🔬
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Development @dev-journal.bsky.social · 02/10/2025
Modifying mechanical constraint guides gastruloid patterning This Research Highlight showcases the work from Judith Pineau @judithpineau.bsky.social, Jerome Wong-Ng @jeromewongng.bsky.social, Thomas Gregor @thomasgregor.bsky.social and colleagues: journals.biologists.com/dev/article/...
Figure 2 - Gene expression patterning and transcriptional profiles in hydrogel-grown gastruloids. (A) Representative immunofluorescence images of gastruloids at 120 h. Gastruloids were grown in standard culture conditions (Ctrl, no hydrogel) or embedded in hydrogels with increasing concentrations (0.7 mM, 0.8 mM and 1.0 mM) at 96 h post-seeding. Nuclei (blue), BRA (purple) and SOX2 (yellow) are labeled. (B,C) Normalized expression profiles of SOX2 (B) and BRA (C) along the AP axis, demonstrating consistent expression patterns across conditions. (D) Principal component analysis of bulk RNA-seq experiments (three replicates), revealing clear separation between Ctrl and noCHI (red), a negative control for gastruloid formation, while hydrogel-embedded conditions cluster near Ctrl. (E) Number of significantly differentially expressed (DE) genes compared to Ctrl, showing substantial transcriptional changes in noCHI and minimal changes in hydrogel-embedded conditions (0.7 mM, 0.8 mM and 1.0 mM). Shown here are representative data and analysis for one experimental replicate. See Fig. S3 for two additional replicates.
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Judith Pineau @judithpineau.bsky.social · 03/10/2025
In this beautiful system, we could show uncoupling of gene expression profiles, morphology and patterning… #NotInTheGenes 😉 (also includes a method to do long term 🔬 of elongating gastruloids) Thank you to all involved @jeromewongng.bsky.social @thomasgregor.bsky.social @alexandremayran.bsky.social
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Christophe 🔬 Leterrier @christlet.bsky.social · 26/09/2025
#FluorescenceFriday: getting ready for #GEF25, playing with Ciarán's stunning ExM data
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Dr Elodie Chabrol @eloscicomm.bsky.social · 23/09/2025
👩‍🔬J'ai commencé un kit de démarrage "chercheuses en France" go.bsky.app/TBEzKC #FemmesEnScience J'ai besoin de votre aide pour le remplir et donner de la visibilité aux chercheuses que vous connaissez et qui sont sur Bluesky ! ▶️Taguez celles que vous connaissez, je les ajoute !
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Claire Dessalles @clairedessalles.bsky.social · 15/09/2025
Super clear thread for super cool science!
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