Sébastien DARRAS
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darras-sebastien.bsky.social
Sébastien DARRAS
@darras-sebastien.bsky.social
200 followers 330 following 18 posts
Researcher at CNRS working on EvoDevo using #ascidians. #DEEVA team at the marine station in the beautiful Banyuls-sur-mer #WindyBanyuls
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darras-sebastien.bsky.social
Sébastien DARRAS @darras-sebastien.bsky.social · 5d
The #DEEVA team supports the #OrangeDay and wants to relay this awareness and information action on all violence against women in education, higher education and research, but also in society.
The logo for the DEEVA team in orange.
Reposted by Sébastien DARRAS
ornikkar.bsky.social
Lectures de Noël (Par @gros-dessinateur.bsky.social)
November 27, 2025 at 12:33 PM
Reposted by Sébastien DARRAS
liberation.fr
🔴 Nicolas Sarkozy définitivement condamné dans l’affaire Bygmalion
Nicolas Sarkozy définitivement condamné dans l’affaire Bygmalion
Cette procédure en cassation était l’ultime recours en droit français pour l’ancien président, condamné en première instance puis en appel pour l’explosion des dépenses de sa campagne électorale en 2012.
www.liberation.fr
November 26, 2025 at 1:11 PM
darras-sebastien.bsky.social
The #DEEVA team supports the #OrangeDay and wants to relay this awareness and information action on all violence against women in education, higher education and research, but also in society.
The logo for the DEEVA team in orange.
November 26, 2025 at 8:25 AM
Reposted by Sébastien DARRAS
liberation.fr
✏ Le dessin du jour, par Coco
November 25, 2025 at 6:01 AM
Reposted by Sébastien DARRAS
clytia-vlfr.bsky.social
Drawing together findings from several projects over many years, we make a case that neural cell types in the Clytia larva have two embryological origins: i-cells and ectodermal.
bioRxiv 2025.11.17.688882; doi: doi.org/10.1101/2025...
Separation of the Early gastrula into oral and aboral halves shows that some neural cell tupes derive from aboral ectoderm, and others from i-cells
November 19, 2025 at 7:43 AM
Reposted by Sébastien DARRAS
fabianrentzsch.bsky.social
Our paper on the role of neurons in Nematostella head regeneration is now out at @currentbiology.bsky.social Big thank you to all collaborators, it was a pleasure!

Ectopic head regeneration after nervous system ablation in a sea anemone: Current Biology www.cell.com/current-biol...
Ectopic head regeneration after nervous system ablation in a sea anemone
Via genetic ablation of neurons, Mazloumi Gavgani et al. show that the nervous system is essential for defining axial polarity during whole-body regeneration in the sea anemone Nematostella vectensis.
www.cell.com
November 18, 2025 at 10:00 AM
Reposted by Sébastien DARRAS
evolvwing.bsky.social
🚨New paper! 🚨
@jasminealqassar.bsky.social led this work on the silk glands of the pantry moth.

These two long tubes inside the caterpillar continuously make a ton of silk
How does this special organ work?

www.cell.com/iscience/ful...
@cp-iscience.bsky.social

🧵THREAD🧵
November 16, 2025 at 2:06 AM
Reposted by Sébastien DARRAS
stemdevevo.bsky.social
Intéressé ? N’hésitez pas à nous contacter pour les aspects recherches !
ijmonod.bsky.social Institut Jacques Monod @ijmonod.bsky.social · 19d
#JobOffer

💼 Un poste susceptible d’être vacant de Maitre de Conférences en neurobiologie devrait s’ouvrir pour la rentrée 2026

L’équipe Gazave @stemdevevo.bsky.social est l'une des équipes d’accueil potentielles.

➡️ Informations concernant ce poste et la procédure de candidature 🔗 buff.ly/OjEQ8yp
November 13, 2025 at 6:17 PM
Reposted by Sébastien DARRAS
genomebiolevol.bsky.social
@xodroont.bsky.social et al. explored the diversity and evolution of opsins using meta-omic data from the Tara Oceans and Tara Polar Circle expeditions, identifying opsins across the different metazoan groups.

🔗 doi.org/10.1093/gbe/evaf189

#genome #evolution #opsins
GBE | An Ocean of Opsins
November 14, 2025 at 11:00 AM
Reposted by Sébastien DARRAS
telerama.bsky.social
Le dessin du jour, par Soulcié
November 14, 2025 at 7:02 AM
Reposted by Sébastien DARRAS
curiousnews.bsky.social
Bizarre Creature With 'All-Body Brain' Challenges What We Know About Evolution of Nervous Systems
Bizarre Creature With 'All-Body Brain' Challenges What We Know About Evolution of Nervous Systems
What other animals have we underestimated?
www.iflscience.com
November 12, 2025 at 8:54 PM
Reposted by Sébastien DARRAS
yvesclement.bsky.social
[Message de service] Vous pensez/voulez postuler à un poste de Maître de Conférence ? Fort bien.
Avez-vous pensé à vous inscrire pour passer votre qualification ? C'est en ce moment qu'il faut aller s'inscrire en ligne... (odyssee.enseignementsup-recherche.gouv.fr)
Odyssée
odyssee.enseignementsup-recherche.gouv.fr
October 13, 2025 at 10:22 AM
Reposted by Sébastien DARRAS
paulbump.bsky.social
Excited to share our recent work from @lowelab.bsky.social on the intersection of life history and cell type evolution: www.biorxiv.org/content/10.1...
www.biorxiv.org
November 6, 2025 at 10:03 PM
Reposted by Sébastien DARRAS
arnonelab.bsky.social
Our study, just published in #ScienceAdvances and funded by @hfspo.bsky.social, explores the post metamorphic cell composition of the sea urchin juvenile, revealing that its body is head-like. Long considered brainless creatures, they’re all brain instead!
www.science.org/doi/10.1126/...
Single-nucleus profiling highlights the all-brain echinoderm nervous system
A sea urchin is a head with a brain-like organization and a vertebrate-type retinal signature.
www.science.org
November 5, 2025 at 7:03 PM
Reposted by Sébastien DARRAS
piatkevich.bsky.social
AAVs are crucial vectors for delivering biosensors into neurons! Using AAV delivery, we perform two-color imaging of calcium and potassium transients in neurons. These AAVs are now available from @braincase.bsky.social www.ebraincase.com/news/new-pro...
November 6, 2025 at 10:15 AM
Reposted by Sébastien DARRAS
liberation.fr
Si le site avait vendu du matériel servant à des actes terroristes, les serveurs seraient déjà saisis, les dirigeants interpellés. Mais quand il s’agit de violences sexuelles faites aux enfants, on tergiverse, déplore Arnaud Gallais, président de Mouv’enfants.

➡️ bit.ly/3LtDfF0
November 5, 2025 at 1:01 PM
Reposted by Sébastien DARRAS
lionlchristiaen.bsky.social
Could not be more happy/proud/relieved to finally see this longstanding study published. Bluetorial to follow. @msarscentre.bsky.social
Cell cycle-driven transcriptome maturation confers multilineage competence to cardiopharyngeal progenitors | The EMBO Journal www.embopress.org/doi/full/10....
Cell cycle-driven transcriptome maturation confers multilineage competence to cardiopharyngeal progenitors | The EMBO Journal
imageimageDuring development, multipotent cardiopharyngeal progenitors express both cardiac and pharyngeal muscle transcriptional programs. This study in the tunicate Ciona shows that cell cycle-regul...
www.embopress.org
November 4, 2025 at 6:05 AM
Reposted by Sébastien DARRAS
mauriceelphick.bsky.social
The website for the 12th European Conference on #Echinoderms (London, July 2026) has gone live today. I am pleased to be involved as a member of the organising committee. Please spread the word: www.euroechino.net
12th European Echinoderm Meeting 2026
description
www.euroechino.net
November 4, 2025 at 5:45 PM
Reposted by Sébastien DARRAS
monicabettencourt.bsky.social
📣 We are moving to Barcelona to join the amazing @crg.eu and explore how centrosomes & cilia work, evolve & respond to the environment. We are looking for
PhD students www.crg.eu/en/content/t...
Postdocs gimm.pt/jobs/postdoc...
Other calls to open, also for an experienced lab manager.
Get in touch!
October 30, 2025 at 1:15 PM
Reposted by Sébastien DARRAS
invertevo.bsky.social
Fully funded PhD position in my lab on the origin of the echinoderm skeletal ossicles. Join us in Montreal!

mapageweb.umontreal.ca/cameroc/Pubs...
mapageweb.umontreal.ca
October 30, 2025 at 2:23 PM
Reposted by Sébastien DARRAS
robertofeuda.bsky.social
New preprint out! Evolutionarily conserved transcriptional regulators control monoaminergic neuron development.
We uncover how ancient regulatory programs orchestrate the neurons that produce serotonin and dopamine across 550 million years of evolution.
doi.org/10.1101/2025...
Evolutionarily conserved transcriptional regulators control monoaminergic neuron development
To what extent conserved developmental programs specify homologous cell types is a central question in biology. Here, we address this by focusing on reconstructing monoaminergic neuron development in ...
doi.org
October 30, 2025 at 9:42 AM
Reposted by Sébastien DARRAS
mblscience.bsky.social
🔬 Applications are now open!

Join MBL’s world-renowned Advanced Research Training Courses, where scientists from around the globe come together to explore new ideas, master cutting-edge techniques, and become part of a dynamic network.

➡️Apply today: go.mbl.edu/courses
Course Offerings | Marine Biological Laboratory
go.mbl.edu
October 28, 2025 at 6:08 PM
Reposted by Sébastien DARRAS
devbiol.bsky.social
#DBfeature

Scientists have identified a provisional regulatory circuit downstream of the transcription factor Pax3/7 operating in the descending decussating neurons (ddNs) of the tunicate Ciona robusta.

By Kim, K., Piekarz, K. M., & Stolfi, A.
doi.org/10.1016/j.yd...
Upper panel: The descending decussating neurons (ddNs) of a Ciona larva at 19.5 h post-fertilization (hpf at 20 ◦C, ~ Hotta stage 29) labeled by expression of elecroporated Dmbx/Defcab >Unc-76::YFP reporter plasmid. Scale bar =10 μm. Right: comparative diagrams of ddNs and their putative vertebrate homologs, the Mauthner cells (species depicted as an example is Danio rerio). Lower panel: A summary diagram of a ddN gene regulatory network. Diagram for a ddN-specific gene regulatory network downstream of Pax3/7. Some branches are shared with different neuron types, such as ACINs, epidermal neurons, or papilla neurons (a sub-type of epidermal neurons). Dashed arrow indicates regulatory connection supported by RNAseq data, but not validated by reporter plasmids or in situ mRNA hybridization. Grey arrow indicates possible role of Lhx1/5 in regulating maintenance, but not initial activation of Dmbx and Defcab.
October 27, 2025 at 5:04 PM
Reposted by Sébastien DARRAS
lionlchristiaen.bsky.social
See you all in #BeautifulRoscoff next Spring 🙌🏻
bardinlab.bsky.social Bardin Lab @bardinlab.bsky.social · Oct 23
I am very excited to announce the opening of the submission site for the upcoming Conférences Jacques Monod on Developmental Biology, May 18-22, 2026 cjm.sb-roscoff.fr/en/conferenc...
@lionlchristiaen.bsky.social and I have an exciting program of speakers and slots for selected short talks, etc.
October 23, 2025 at 1:45 PM
Reposted by Sébastien DARRAS
yghavi.bsky.social
Ever wondered what drives enhancer-promoter specificity? Why would an enhancer activate one gene rather than another neighboring one?

Check our latest preprint, led by @mmasoura.bsky.social, to find out!
www.biorxiv.org/content/10.1...
Promoter-proximal gatekeepers restrict pleiotropic enhancer inputs to achieve tissue specificity
Developmental enhancers are central regulatory elements that can activate multiple genes, yet how they selectively regulate one gene over its neighbours remains unclear. Using the Drosophila twist E3 ...
www.biorxiv.org
October 16, 2025 at 12:34 PM