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Cathy Sirour-Geoffroy

@ktigeoffroysirour.bsky.social
83 followers 87 following 3 posts

Developmental Biology, phD Ascidian embryos, microscopy 🔬 and images analysis 👩🏼‍💻 LBDV lab, Sorbonne university, CNRS Olympics game addict 🏊‍♀️

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Reposted by Cathy Sirour-Geoffroy
Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 21/07/2026
📽️ Documentaire "Méditerranée : état d’urgence climatique" #TVMONACO #CentreScientifiqueMonaco @univcotedazur.bsky.social @jpgattuso.bsky.social #LOV @cnrs.fr @sorbonne-universite.fr 👇 videos.tvmonaco.com/content/medi...
videos.tvmonaco.com
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 13/07/2026
Mon Quotidien, dans sa version du magazine pour les 10-13 ans, est venu faire un reportage sur la Sagitta 3 ! A retrouver dans le numéro #MonQuotidien du 10/07 ! @cnrs.fr @sorbonne-universite.fr @cnrscotedazur.bsky.social 👇 monquotidien.playbacpresse.fr/article/repo...
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 13/07/2026
Bravo à Michael Schubert, chercheur @biodev-vlfr.bsky.social récompensé par le titre de "Distinguished Fellow" de la société savante Euro Evo Devo dont il a contribué à la création il y a 20 ans. Il en organisa les meetings de 2006 à 2018. @cnrs.fr @cnrscotedazur.bsky.social @sorbonne-universite.fr
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SFBD_BioDev @sfbd.bsky.social · 13/07/2026
Want to show your love for DevBio??? Register for this free meeting ! This is that easy !
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Nicolas Minc @minclab.bsky.social · 03/07/2026
Our work on size scaling for centrosome positioning in early embryos is now out in @currentbiology.bsky.social Congratulations to Aude et al. ! www.cell.com/current-biol... @cnrsbiologie.bsky.social @ijmonod.bsky.social @upcite.bsky.social
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Society for Developmental Biology @socdevbio.bsky.social · 04/07/2026
A window into early development! 🔬✨ This 2-photon image of a Ciona neurula embryo reveals a nuclear SoxB1 reporter (grey) and a membrane Msxb reporter, color-coded along the anterior–posterior axis, highlighting the organization of the developing nervous system. 📷: Laurence Lemaire #FluoresceFriday
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James Briscoe @jamesbriscoe.bsky.social · 15/06/2026
New Review: The notochord From transient embryonic source of morphogen for patterning the neural tube and somites to the cells that persist in intervertebral discs We bring together development, single-cell data and stem cell models of notochord formationn journals.biologists.com/dev/article/...
journals.biologists.com
The notochord: development, disease and stem cell-based modelling
Summary: This Review discusses how developmental and stem cell studies of the notochord can reveal key insights into spine formation and intervertebral disc development and maintenance, providing new ...
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 17/06/2026
Lancement de la mission 6 (atlas de données environnementale) de l’objectif 10 « fonds marins » France 2030 à l’IMEV ! Prise de paroles institutionnelles et déploiement des planeurs dans la rade à suivre ! #LOV @cnrs.fr @enseignementsup-recherche.gouv.fr #SGmer #ALSEAMAR @sorbonne-universite.fr
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 17/06/2026
Et voilà le déploiement des planeurs (gliders) !
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Michael Sars Centre @msarscentre.bsky.social · 17/04/2026
Our strategy is evolving 💡 Michael Sars Centre Director @lionlchristiaen.bsky.social shares future plans for studying living systems in the context of a changing ocean, together with collaborators at @cbubergen.bsky.social and the Dept. of Biological Sciences 🌊 Read more below ⤵️
tinyurl.com
What future for marine life in a changing world?
As the ocean undergoes rapid anthropogenic changes that impact ecosystems, the Michael Sars Centre’s strategy evolves to study life in context, from molecules to ecosystems.
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La Science, CQFD @sciencecqfd.bsky.social · 03/06/2026
#Podcast Valentina Emiliani : visionnaire de l'optogénétique, à (ré)écouter via @franceculture.fr ! #ScienceCQFD
radiofrance.fr
Valentina Emiliani : visionnaire de l'optogénétique
L'optogénétique classique active des circuits neuronaux entiers, sans distinguer le rôle de chaque cellule. L'approche circuit optogenetics de Valentina Emiliani combine holographie et optogénétique e...
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Development @dev-journal.bsky.social · 15/05/2026
Issue 8 is now complete! On the cover: Embryos of diverse animals & choanoflagellates expressing different fluorescent reporters, from a project to identify membrane-localising tags across diverse organisms. See the Techniques and Resources Article by Karapidaki et al. doi.org/10.1242/dev....
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CharrierLab @brownalgaedev.bsky.social · 16/05/2026
🌊🔬The unique way of kelp embryogenesis: Cell lineage and single-cell transcriptomics reveal the radical switch turning cells into rhizoids in Saccharina embryos: ▶️ New preprint doi.org/10.64898/202... #evolution #embryo #scRNAseq #marinebiology #kelp #algae #celldivision #transcriptomics
Embryo of the kelp Saccharina with a differentiated rhizoid.
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 03/04/2026
⚓️ La station ça et là (4) Cathy Sirour @biodev-vlfr.bsky.social prépare des embryons d’ascidie Ciona intestinalis pour détecter in situ l’ARNm Otx codant pour une protéine qui détermine les cellules à l’origine des neurones. @cnrs.fr @sorbonne-universite.fr @cnrscotedazur.bsky.social 1/2
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 10/04/2026
La station ça et là (5) Hitoyoshi Yasuo @biodev-vlfr.bsky.social injecte un ARN messager pour faire exprimer des protéines Ets dans les embryons de Ciona intestinalis. @cnrs.fr @sorbonne-universite.fr @cnrscotedazur.bsky.social 1/2
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 15/04/2026
Félicitations à Luis BEZARES-CALDERON @biodev-vlfr.bsky.social lauréat d'une bourse « Research Grant » de Human Frontier Science Program Organization @hfspo.bsky.social pour le projet Tracing the Evolutionary History of Sensory Perception via TPR Channels www.insb.cnrs.fr/fr/cnrsinfo/...
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bioRxiv Developmental Biology @biorxiv-devbio.bsky.social · 20/12/2025
Regulation of motor neuron differentiation in the Ciona larva www.biorxiv.org/content/10.64898/20…
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Andrew D Thaler @drandrewthaler.bsky.social · 19/12/2025
AI slop has made it to the deep sea. That’s not a blobfish: Deep Sea Social Media is Flooded by AI Slop www.southernfriedscience.com/thats-not-a-...
southernfriedscience.com
That’s not a blobfish: Deep Sea Social Media is Flooded by AI Slop
Well, it finally happened. Over the last two week, my usually well-curated feeds of videos from the deep sea have been overrun with AI slop masquerading as authentic images of strange and delightfu…
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 19/12/2025
🌊 Les plateformes @imev-mer.fr à la loupe 🔎 Plateforme de Biologie Moléculaire-Service Cytométrie Chapitre 5 : Prestation de Cytométrie Spectrale et Tri Cellulaire @cnrs.fr @sorbonne-universite.fr @embrc-eu.bsky.social @embrc-france.bsky.social
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the Node @the-node.bsky.social · 18/12/2025
Apply for Development's Pathway to Independence programme The programme aims to support a small number of researchers in the fields of developmental biology, stem cells and regeneration as they transition from postdoc to group leader. Read more ⬇️ thenode.biologists.com/apply-for-de...
thenode.biologists.com
Apply for Development's Pathway to Independence programme - the Node
Development are currently welcoming applications for our Pathway to Independence (PI) programme, which aims to support a small number of researchers in
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paveltomancak.bsky.social @paveltomancak.bsky.social · 13/12/2025
#Mastodon, the Command Center for Large-Scale Lineage-Tracing Microscopy Datasets, is finally heading for publication (well, let's see). To #cite or not to cite shall no longer be the question 🙃, because the #preprint. Software is available in every #Fiji near you. www.biorxiv.org/content/10.6...
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Pawel Burkhardt @pawelburkhardt.bsky.social · 09/12/2025
The curious case of the comb jelly, where we described a comb jelly with the ability to reverse its development to an earlier stage of life, is now also available at #spotify 🤩 #ctenophores 🪼⏪ open.spotify.com/episode/6c2O... with @joanjsoto.bsky.social @msarscentre.bsky.social
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LBDV Villefranche @biodev-vlfr.bsky.social · 09/12/2025
New from Silvia Caballero, Stefania Castagnetti and friends - Embryonic development of the Mediterranean starfish Hacelia attenuata www.biorxiv.org/content/10.6...
biorxiv.org
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Guillaume Desbrosse @desbrosseg.bsky.social · 08/12/2025
La curiosité scientifique du jour : Dans les profondeurs extrêmes des océans, on entre dans un monde où même la chimie devient hostile. À plus de 8 000 m, certaines créatures ne peuvent tout simplement pas remonter : leur squelette… se dissoudrait. 😬🌊
profondeur ocean
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Lionel Christiaen, PhD (he/him/his) @lionlchristiaen.bsky.social · 08/12/2025
Very happy to see this piece on the Tunicate Ciona published. Grateful to @alexandrejan.bsky.social and @chiaracastelletti.bsky.social for the Illustrations, and to @natmethods.nature.com for the opportunity to showcase our ever emerging model organism www.nature.com/articles/s41...
nature.com
The tunicate Ciona - Nature Methods
The ascidian tunicate Ciona, one of the closest relatives of the vertebrates, inhabits shallow temperate waters in the worldwide ocean. A unique combination of simple stereotyped embryogenesis, regula...
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SFBD_BioDev @sfbd.bsky.social · 25/11/2025
Deadline to submit your application is approaching! Come for the fun! Stay for the fun
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Cnidarian developmental mechanisms group @clytia-vlfr.bsky.social · 19/11/2025
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
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Martin Stevens @wildlifevision.bsky.social · 17/11/2025
The rare & beautiful violet sea snail - a predator of Portuguese Man O’War & by-the-wind sailors. It lives its whole life at the surface of the open ocean, using a bubble raft to stay afloat. It’s normally more common in warmer waters but occasionally seen here #marinebiology #marinelife #oceanlife
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Zebrafish Rock! 🎃 @zebrafishrock.bsky.social · 16/11/2025
Axonal pathfinding of zebrafish retinal ganglion cells forms the optic nerve. Credit to Dr. Matthew Bostock @houartlab.bsky.social. #ZebrafishZunday 🧪
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Jenifer Croce @croce-urchin.bsky.social · 14/11/2025
Proud to have been part of this very nice piece of work and this great collaboration. Congratulations to all. www.science.org/doi/10.1126/...
science.org
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.
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Jean-Pierre Gattuso @jpgattuso.bsky.social · 12/11/2025
I am honored to be named again among the Highly Cited Researchers. Deep thanks to the students, colleagues, and partners whose work, reviews, and open data enable rigorous research. 🌊 @iddri.bsky.social @cnrs.fr @sorbonne-universite.fr @imev-mer.fr clarivate.com/highly-cited...
clarivate.com
Clarivate Highly Cited Researchers 2025
The Highly Cited Researchers 2025 list identifies and celebrates individuals who have demonstrated significant and broad influence in their fields of research. Through rigorous selection criteria and ...
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Lionel Christiaen, PhD (he/him/his) @lionlchristiaen.bsky.social · 04/11/2025
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....
embopress.org
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...
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The EMBO Journal @embojournal.org · 05/11/2025
Cell cycle-driven transcriptome maturation confers multilineage competence to cardiopharyngeal progenitors Wei Wang, @lionlchristiaen.bsky.social and colleagues www.embopress.org/doi/full/10....
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Michalis Averof @michalis-averof.bsky.social · 26/10/2025
These are embryos of a jellyfish, made up of cells that are about a fiftieth of a millimetre in size. Their outlines are visible thanks to fluorescent markers identified by Sarah Asaf and @clytia-vlfr.bsky.social see doi.org/10.1101/2024... 🧵
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Michalis Averof @michalis-averof.bsky.social · 26/10/2025
What are these? You are looking at embryos of a sea squirt. Each of the 'soap bubbles' is a living cell, about a fourtieth of a millimetre in size. The outlines of the cells are visible thanks to fluorescent markers identified by Hitoyoshi Yasuo @hitoyas.bsky.social see doi.org/10.1101/2024... 🧵
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 16/10/2025
Thalia democratica "catches the eye of Nikkon" ! "Oozoid of a sea squirt" reconnue "Image of Distinction" au concours 2025 "Nikkon Small World Photomicrography" Mette Handberg-Thorsager, LM Ulbrich @uni-goettingen.de & A. Alié @biodev-vlfr.bsky.social www.nikonsmallworld.com/galleries/20...
nikonsmallworld.com
Oozoid of a sea squirt (Thalia democratica) | 2025 Photomicrography Competition
Mette Handberg-Thorsager - Oozoid of a sea squirt (Thalia democratica)
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Laurent Formery @laurentformery.bsky.social · 16/10/2025
Sea cucumbers are beautiful! 🥒 This image shows the skeleton of a baby sea cucumber. Very happy that it got awarded by #NikonSmallWorld 😊 👇 Check the preprint by @PranavVyas and @prakashlab.bsky.social if you want to learn more about skeleton development in these animals: shorturl.at/J3g1h
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Institut de la Mer de Villefranche/Mer (IMEV) @imev-mer.fr · 15/10/2025
« C’est une tragédie qui se déroule sous nos yeux » @jpgattuso.bsky.social #LOV Le dépérissement des coraux est un « lanceur d’alerte » des points de bascule de la planète Retrouvez deux articles @lemonde.fr #LaCroix www.lemonde.fr/planete/arti... www.la-croix.com/planete/cora...
lemonde.fr
Le premier point de bascule de la planète aurait été atteint avec le « dépérissement généralisé » des coraux
Un rapport signé par 160 scientifiques, publié lundi, alerte sur la « crise sans précédent » rencontrée par les récifs coralliens d’eau chaude.
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Oded Rechavi @odedrechavi.bsky.social · 15/10/2025
BIG ANNOUNCEMENT📣: I haven’t been this excited to be part of something new in 15 years… Thrilled to reveal the passion project I’ve been working on for the past year and a half!🙀🥳 (thread 👇)
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Manuel Thery @manuelthery.bsky.social · 14/10/2025
We hire! The CytoMorpho Lab is looking for an engineer with a background in cell and molecular biology to join our team in Paris. This is a 18-month contract position, but we're open to exploring long-term opportunities. More details here: cytomorpholab.com/index.php/jo...
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Cathy Sirour-Geoffroy @ktigeoffroysirour.bsky.social · 04/10/2025
@biodev-vlfr.bsky.social Ready for the "Fête de la science" 🐙🪼🔬🦠. Village des sciences Villeneuve-Loubet @imev-mer.fr @sorbonne-universite.fr @cnrsbiologie.bsky.social
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Alexandra Delbot @alexandradelbot.bsky.social · 27/08/2025
La quasi-totalité des méduses mènent une double vie : fixées dans les fonds marins ou libres dans l’eau. Mais certaines ont échappé à ce cycle et passent toute leur vie à dériver. Selon une nouvelle étude, ces espèces dites holoplanctoniques ont colonisé l'Océan. Dériver pour mieux régner !
radiofrance.fr
Le radeau des méduses : quand dériver permet de coloniser l’océan
La plupart des méduses mènent une double vie : fixées au fond, puis libres dans l’eau. Mais certaines ont échappé à ce cycle et passent toute leur vie à dériver. Selon une nouvelle étude, ces espèces ...
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Joaquina Delas @joadelas.bsky.social · 26/08/2025
Check out the latest work by @dbenzinger.bsky.social and @jamesbriscoe.bsky.social ! Building gradients in space and time. I am extremely biased but the Dec 15 issue of Dev Cell is 🔥🔥
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eLife @elife.bsky.social · 26/07/2025
🪼 How did the animal body plan evolve? This ‘fundamental’ study in Clytia sheds light on how Wnt3 coordinates both gene expression and planar cell polarity during axis formation, offering key insights into the origins of morphogenesis. buff.ly/lLJ33VF #DevBio
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New England Society for Microscopy @nesmicroscopy.bsky.social · 21/07/2025
🐙 This Octopus shifts from deep to active rest while "dreaming" for #MicroscopyMonday. REM‑like sleep (color bursts and twitches) filmed in real time by Horst Obenhaus @octoscience.bsky.social‬, currently a 2025 Whitman Fellow at @mblscience.bsky.social. #NESM #Octopus #Neuro #SleepScience #MBL
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Michael Sars Centre @msarscentre.bsky.social · 17/07/2025
Researchers from @imev-mer.fr recently visited us for a workshop supported by the French-Norwegian mobility program Åsgard 🌊 Between seminars, lab demos and discussions, new ideas and plans for long-term collaborations emerged 🤩 Read more about this exciting partnership below ⤵️
tinyurl.com
Åsgard workshop sparks new collaborations at the Michael Sars Centre
Researchers from the Institut de la Mer de Villefranche and the Michael Sars Centre received support from the French-Norwegian mobility program Åsgard. Through seminars and discussions, participants l...
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eLife @elife.bsky.social · 13/07/2025
🪼 How did the animal body plan evolve? This ‘fundamental’ study in Clytia sheds light on how Wnt3 coordinates both gene expression and planar cell polarity during axis formation, offering key insights into the origins of morphogenesis. buff.ly/e1Un958 #DevBio
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Omaya Dudin 𓂆 ¦🍉¦🦠¦🔬¦ @dudinlab.bsky.social · 08/07/2025
Come and Join our Dpt in Beautiful #Geneva ! We are looking for a #Microscopy & #Image #Analysis expert to help all of us at the Dpt.
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Barone Lab @baronelab.bsky.social · 07/07/2025
This postdoc position is still open! Apply if you want to come work with us on asymmetric cell divisions in spiralian embryos! postdocs.stanford.edu/prospective/...
postdocs.stanford.edu
Open Postdoctoral position, faculty mentor Vanessa Barone | Office of Postdoctoral Affairs
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Cnidarian developmental mechanisms group @clytia-vlfr.bsky.social · 07/07/2025
Interested in visiting Villefranche, Roscoff or Banyuls marine stations? The EMBRC-France (www.embrc-france.fr) 8th Call for Projects is open. Deadline Sept 19 for stays by end of June 2026. Up to 42 person-days per project are covered, with access to EMBRC-France services, accommodation & catering.
embrc-france.fr
Accueil | EMBRC France
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