Stephane Vassilopoulos

Stephane Vassilopoulos

@stefvass.bsky.social

Cell biologist @INSERM @Sorbonne_Univ_, clathrin, dynamin, neuromuscular diseases, electron microscopy, metal replicas #CLEM πŸ”¬πŸ‡ͺπŸ‡Ί πŸ‡¬πŸ‡· πŸ‡¨πŸ‡΅

1,224 Followers 596 Following 35 Posts Joined Nov 2024
2 weeks ago
VAMP7-dependent late endosomal secretion of ER and mitochondrial proteins impacts the tumor microenvironment and macrophage engagement - Nature Communications The SNARE VAMP7 is essential for an unconventional secretory pathway based on late endosomal secretion. Here the authors show that this secretion functions as an organelle quality-control and stress-c...

#VAMP7-dependent late endosomal #secretion of #ER and #mitochondrial proteins impacts the #tumor #microenvironment and #macrophage engagement
www.nature.com/articles/s41...

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2 weeks ago
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Our article on how to use micropatterned presynapses-on-glass is out in its final form in the latest issue of the Journal of Neuroscience @sfnjournals.bsky.social: www.jneurosci.org/content/46/8...
The cover went to the special section on social neuroscience, so here's our #notthecover attempt

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3 weeks ago

Gotta love Nature's opinion pieces

"Science funding needs fixing - but not like that"

"Academic publishing is broken - but publishing less is not the solution"

"AI will kill science - how can researchers use it to be more efficient?"

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3 weeks ago
FCHo2, not talin, enables inside-out activation of integrin Ι‘vΞ²5 in curved adhesions - Nature Communications Talin has been believed to be indispensable for integrin activation. Here, the authors show that the curvature-sensing protein FCHo2, not talin, enables inside-out activation of integrin Ι‘vΞ²5 in curve...

FCHo2, not talin, enables inside-out activation of integrin Ι‘vΞ²5 in curved adhesions
www.nature.com/articles/s41...

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1 month ago
Montage of COS7 cells stained for actin and imaged on an Apotome microscope

A menagerie of COS cells for #MicroscopyMonday πŸ§ͺ

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1 month ago
Professor Richard O. Hynes PhD FRS (1944-2026) - Manchester Centre for Cell-Matrix Research

My personal obituary for Richard Hynes now live on the Manchester Cell-Matrix Centre website. www.manchester-matrix.org/news/profess...

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1 month ago

This is finally out in J Neuroscience! A micropatterned presynapse-on-glass approach to resolve the nanoscale architecture and function of presynapses
www.jneurosci.org/content/earl...

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1 month ago
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A Modular Encapsulation System for Precision Delivery of Proteins, Nucleic Acids, and Small Molecules Targeted nanoparticles have the potential to revolutionize therapeutics for medical applications. Here, we demonstrate the utility of a flexible precision nanovesicle delivery system for functional de...

Excited to share our work engineering caveolin-derived nanoparticles β€œcaveospheres”. We show their use for targeted transfection in cultured cells and effective targeted delivery and tumor killing in vivo.
pubs.acs.org/doi/full/10....

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1 month ago
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Direct labeling of microtubule turnover reveals in-lattice repair and stabilization patterns in developing neurons The microtubule cytoskeleton is the backbone of neuronal morphogenesis, driving the development of the dendrites and axon, and supporting trafficking to distant compartments. How neuronal microtubules...

🚨The Neurocyto lab is branching out in our latest preprint! We used tubulin microinjection to directly visualize microtubule turnover in developing hippocampal neurons, demonstrating the presence of in-lattice repair and a selective stabilization in the nascent axon. Check below, or read on 🧡 1/9

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2 months ago
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An epidermal membrane-associated periodic skeleton restricts endocytosis to stabilize neuron-epidermal attachment and preserve axons An epidermal membrane periodic scaffold protects axons from damage.

Latest paper is now out and features on the cover of Science Advances πŸ‘‰ tinyurl.com/vea5862x

Very grateful Igor Bonacossa Pereira, Dat Le & Massimo Hilliard @hilliardlab.bsky.social for their creativity & passion.

Read more about it πŸ‘‰
tinyurl.com/56awjda5
& πŸ‘‰ tinyurl.com/2vp8p8uk

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2 months ago
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Biology and therapeutic potential of extracellular vesicle targeting and uptake - Nature Reviews Molecular Cell Biology Extracellular vesicles are released from almost all cell types and mediate intercellular communication by delivering proteins, nucleic acids and lipids. This Review examines extracellular vesicle upta...

What a great start for 2026 for the EVICAT team!!!
Everything you need to know about extracellular vesicles' recipient cells and how to harness these pathways for therapeutic purposes
Thanks to all co-authors!
bit.ly/3N9InyW

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2 months ago
JCI - A tribute to Stuart A. Kornfeld (1936–2025)

A tribute to Stuart Kornfeld, pioneering #glycotime scientist whose work on mannose-6-phosphate receptor lysosomal trafficking (among many other contributions) was highly influential to our work 🫑

www.jci.org/articles/vie...

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2 months ago
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New paper out!
We show how mechanosensitive adherens junction proteins link actomyosin contractility to actin assembly using in vitro reconstitution.
Huge congrats to AurΓ©lie Favarin, Rayan Said, & all authors!
In Science Advances: www.science.org/doi/10.1126/...
#actin #myosin #mechanobiology

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2 months ago

Optogenetic SH3 nanoclustering of SRC and HCK uncovers the functional specificity of these redundant kinases in macrophages. https://www.biorxiv.org/content/10.64898/2025.12.27.692121v1

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2 months ago
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Combining the CryoCapsule, HPM live Β΅ and R221 conductive resin to track endosome from live imaging to electron microscopy using high-pressure freezing - Scientific Reports Scientific Reports - Combining the CryoCapsule, HPM live Β΅ and R221 conductive resin to track endosome from live imaging to electron microscopy using high-pressure freezing

A comprehensive article for our unique Live-to-HPF CLEM workflow in Scientific Reports!πŸ”¬β„οΈ Thanks to all who supported our long journey!
Images are taken @ImagoSeine @ijmonod.bsky.social @imagerie-gif.bsky.social @i2bcparissaclay.bsky.social @jeoleurope.bsky.social
www.nature.com/articles/s41...

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2 months ago
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Keratin intermediate filaments mechanically position melanin pigments for genome photoprotection - Nature Cell Biology Benito-MartΓ­nez, Salavessa and colleagues show that keratin intermediate filaments and microtubules control the three-dimensional perinuclear position of melanin-containing organelles, shielding the D...

@natcellbio.nature.com - Finally out! Skin cells mechanically protect their genome from UV by positioning melanin above nucleus. Keratin filaments & microtubules drive the process. Led by Silvia Benito-Martinez & @laurasalavessa.bsky.social @membramics-lab.bsky.social www.nature.com/articles/s41...

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3 months ago
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#LivingArchitectures
We put cells and cytoskeleton filaments on the architecture of the musΓ©e d'Orsay.
www.musee-orsay.fr/fr/agenda/ev...
Scientists of the #CytoMorphoLab adapted their protocols to illustrate the questions that keep them awake at night.
-> Two shows on the 24th and 25th of January.

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3 months ago
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Today, our animation synthesizing decades of research on actin-mediated endocytosis in budding yeast was published:
journals.biologists.com/jcs/article/...

The result of a fantastic Iwasa-Drubin lab collaboration.

@margotriggi.bsky.social @jiwasa.bsky.social
movie.biologists.com/video/10.124...

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3 months ago
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Assaying the myosin super-relaxed state across muscle types, cells and proteins for understanding muscle biology and use in drug discovery - Nature Protocols The Mant-ATP assay is a simple and accessible means for rapid quantitative assessment of the ratio of super-relaxed myosin to disordered relaxed myosin. This protocol provides a standardized methodolo...

Great collaborative work led by Christopher Toepfer and his team at the University of Oxford

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3 months ago
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is there a direct crosstalk between actin and vimentin intermediate filaments? Our work shows that vimentin promotes actin assembly by stabilizing ATP-subunits at the barbed end.
Fantastic work done by @lilianpaty.bsky.social with @romet-jegou-lab.bsky.social

www.biorxiv.org/content/10.1...

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3 months ago
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Alternative Splicing of SORBS1 Affects Neuromuscular Junction Integrity in Myotonic Dystrophy Type 1 Background Myotonic dystrophy type 1 (DM1) is a multisystemic neuromuscular disorder characterized by CTG repeat expansion in the 3β€² untranslated region of the dystrophia myotonica protein kinase co...

I am thrilled to share our new article entitled 'Alternative splicing of SORBS1 affects neuromuscular junction integrity in myotonic dystrophy type 1 onlinelibrary.wiley.com/doi/10.1002/...

@cecilemartinat.bsky.social

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3 months ago
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PhD student management tip from his advisor RenΓ© Couteaux, discoverer of the neuromuscular junction: "*points at 50 cm of lab bench* here's where you'll work. I'll be back in three months to see what you've done"

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3 months ago
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I'm at the French Society for Myology meeting with @stefvass.bsky.social! He just made a book about the late Michel Fardeau, first president of the society, pioneer of electron microscopy for muscle and muscle disease
en.wikipedia.org/wiki/Michel_...

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5 months ago
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The Microscopists | Christophe Leterrier (CNRS & Aix-Marseille UniversitΓ©) This time on The Microscopists, we're joined by Christophe Leterrier, team leader at NeuroCyto in Marseille and director of a Nikon Center of Excellence for super-resolution microscopy.Christophe r...

Want to hear a mid-career PI pontificate about science, career and cooking? Today's your lucky day thanks to The Microscopists podcast! Thanks Peter @yorkbioimaging.bsky.social for having me πŸŽ™οΈπŸŽ§
themicroscopists.bitesizebio.com/episodes/chr...

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5 months ago
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New NeuroCyto preprint about to drop! @wiesner-t.bsky.social 😎⏳

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6 months ago
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www.sciencedirect.com/science/arti...

check out the recent dispatch on endolysosomes and melano-biology interplay in @currentbiology.bsky.social by @delevoyecedric.bsky.social & @laurasalavessa.bsky.social from @membramics-lab.bsky.social

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6 months ago
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Adaptor protein complex 2 (AP2) participates in biogenesis and homeostasis of myelin sheaths in the central nervous system Myelination of CNS axons requires oligodendrocytes to undergo extensive morphological changes by producing large amounts of myelin membrane with defined protein composition and structure. The formatio...

If you're interested in trafficking of #myelin constituents in #oligodendrocytes, and of course you are, you may want to check out our new preprint. It's very nice PhD work by @sophiesiems.bsky.social, and we're grateful to all who contributed!

www.biorxiv.org/content/10.1...

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6 months ago

Happy to contribute to this new work from @micoxscopy.bsky.social et al, helping apply SSQUASH to analyse the shape of spectrin rings along axons. Data analysis is the next frontier in SMLM, and I'm always up for chatting, sharing data and see how we can push things further!

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6 months ago

how did I miss this fantastic paper...congrats Marko @kaksonen.bsky.social and team!!

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8 months ago

Diving into "le AIS"🀿

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