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Posts by Antoine Zalc

Summary of Artificial Development System Models

Summary of Artificial Development System Models

#DBfeature #DBreview

Engineering development: From the repressilator and toggle switch to synthetic developmental biology

by Margaret Saha et al
www.sciencedirect.com/science/arti...

4 days ago 5 3 0 0
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Three-dimensional quantitative tissue clearing reveals differences in osteovascular niche of aged and young human mesenchymal stromal cells Nature Biomedical Engineering, Published online: 17 April 2026; doi:10.1038/s41551-026-01645-3A tissue-clearing protocol integrated with mRNA and protein detection is applied to human bone to reveal quantitative differences in osteo-sinusoidal niches of human young and aged mesenchymal stromal cells.

Three-dimensional quantitative tissue clearing reveals differences in osteovascular niche of aged and young human mesenchymal stromal cells

4 days ago 2 3 0 0
Fig. 1. Early expression of TgBAC(ankrd1a:EGFP) transgene in the border zone CMs. Hearts of TgBAC(ankrd1a:EGFP);Tg(−0.8myl7:nls-DsRedExpress) (n = 4) were cryoinjured and left to recover for 6 and 15 h. White dashed line outlines the ventricle. Scale bars, 200 μm.

Fig. 1. Early expression of TgBAC(ankrd1a:EGFP) transgene in the border zone CMs. Hearts of TgBAC(ankrd1a:EGFP);Tg(−0.8myl7:nls-DsRedExpress) (n = 4) were cryoinjured and left to recover for 6 and 15 h. White dashed line outlines the ventricle. Scale bars, 200 μm.

Fig. 6. Persistent TgBAC(ankrd1a:EGFP) expression in CMs adjacent to the residual scar. Hearts (n = 4) of TgBAC(ankrd1a:EGFP);Tg(−0.8myl7:nls-DsRedExpress) zebrafish were cryoinjured and analyzed at 30 dpci, showing different levels of scar resolution (least (A) to most (D) regenerated). The whole hearts after dissection were imaged by fluorescence microscopy (A-D). Serial sections were used for AFOG staining (bright-field images on panels А'-D′) and fluorescence imaging by confocal microscopy (А"-D″). In the indicated region of injury on panels A'-D′, collagen is stained blue, fibrin is stained orange, and CMs are stained brown. Scale bar, 100 μm.

Fig. 6. Persistent TgBAC(ankrd1a:EGFP) expression in CMs adjacent to the residual scar. Hearts (n = 4) of TgBAC(ankrd1a:EGFP);Tg(−0.8myl7:nls-DsRedExpress) zebrafish were cryoinjured and analyzed at 30 dpci, showing different levels of scar resolution (least (A) to most (D) regenerated). The whole hearts after dissection were imaged by fluorescence microscopy (A-D). Serial sections were used for AFOG staining (bright-field images on panels А'-D′) and fluorescence imaging by confocal microscopy (А"-D″). In the indicated region of injury on panels A'-D′, collagen is stained blue, fibrin is stained orange, and CMs are stained brown. Scale bar, 100 μm.

An interesting paper from the Kojic lab shows that ankrd1a - a stress responsive gene is consistently unregulated near damaged site in the ❤️ in zebrafish. Loss of ankrd1a leads to an increase in dedifferentiating cells. Check it out here:
doi.org/10.1016/j.cd...

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Reminder: PhD position in my lab is open for two more weeks.
How do germ cells use their own private transcription factors? Come help us find out.
Fully funded. Deadline May 1.
Flyer attached — please boost! 🙏

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Nice way to let me know I’m not young anymore 😁

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Pictures from Fanny Martinez Real and Stefan Mundlos🙏

Pictures from Fanny Martinez Real and Stefan Mundlos🙏

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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🙏

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Reminder! Application deadline Friday 8th May

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Ressources liées à la biologie du développement pour les enseignants La SFBD propose des ressources destinées aux enseignants afin d’aborder la biologie du développement en classe.

Eager to take part in a workshop? More info at sfbd.fr/ressources/m... and eqd-bio.org

4 days ago 2 1 0 0
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🎉 Great success for our 2nd SFBD-SBCF science outreach day in Ivry-sur-Seine, with the support of the city!
Over a thousand children came to take part in our workshops, led by around fifty researchers from institutes in Paris and Gif-sur-Yvette! Thank you all for your enthusiasm! 🔬🧬

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A fantastic day of outreach in Ivry with 43 classes, 1075 kids and 47 scientists from the @sfbd.bsky.social and @sbcf.bsky.social. Thanks: Mairie of Ivry, @drosopachea.bsky.social Maeva Eglantine and Stéphanie for organizing! And many participants @antoinezalc.bsky.social @michaelrera.bsky.social +

5 days ago 13 5 3 0
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Pascal Demurger, directeur général de la MAIF : « Pour les patrons, le rapprochement avec le RN est une erreur tactique autant qu’une illusion politique » TRIBUNE. Constatant les contacts croissants entre les dirigeants d’entreprise et le Rassemblement national, le directeur général de la compagnie d’assurance avertit, dans une tribune au « Monde », sur...

“L’anticipation de l’échec conduit toujours à son avènement”

www.lemonde.fr/idees/articl...

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In this chaotic ever-changing world of ours, one constant remains over the years: Failed Microsoft updates

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métrodoku Le puzzle quotidien des stations du métro parisien.

New favorite game

métrodoku
13/04/2026
Score : 778/900
🟩🟩🟩
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metrodoku.fr

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Proud to share this work with @kevinchalut.bsky.social and Byron Mui. Why do some injuries scar while others regenerate? Using digit tip models, we show the ECM is a key driver. HA-rich ECM promotes regeneration, and boosting it can shift healing away from fibrosis. www.science.org/doi/10.1126/...

1 week ago 30 15 3 4
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métrodoku Le puzzle quotidien des stations du métro parisien.

métrodoku
10/04/2026
Score : 653/900
🟩🟩🟩
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metrodoku.fr

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Paris in the spring is amazing !

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Preparing lunar observation seems as messy and fun as setting up a FACS

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Hope the evil forces of Vega will let Orion spacecraft alone

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Rocking for 2000 years 🤟🏻🤟🏻🤟🏻

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Pictures of Marie Curie and some of her lab notebooks !
Not giving up my notebooks for online stuff anytime soon!

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After 39years in Paris, today I discovered the National Library Museum

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Care Bears also took off to the Moon!
#artemis2

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This is why dried mango is the best

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Doesnt do well during warm summer and chocking hazard while cycling (these are the new hidden variables 😂)

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😂😂

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Great on a bicycle 😂😂

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Saucisson isn’t a snack. It’s an art de vivre

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Waiting to see what @agathechaigne.bsky.social has to say against it

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I love trader Joe but I’m getting my dried mango directly on the market

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High chocking hazard! See cycling comment 😂

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