Lionel Christiaen, PhD (he/him/his)
@lionlchristiaen.bsky.social
Dev cell syst biol, cardiopharyngeal, coll migr, ecodevo. Dir Sars Centre, U Bergen. NIH DEV1 rev. Prof NYU Bio. Postdoc UC Berkeley. PhD CNRS/Paris XI. Agrégé. Archicube. French & American.
https://www.uib.no/en/michaelsarscentre/141681/christiaen-group
https://www.uib.no/en/michaelsarscentre/141681/christiaen-group
Pinned
Cell cycle-driven transcriptome maturation confers multilineage competence to cardiopharyngeal progenitors
Wei Wang, @lionlchristiaen.bsky.social and colleagues
www.embopress.org/doi/full/10....
Wei Wang, @lionlchristiaen.bsky.social and colleagues
www.embopress.org/doi/full/10....
Re-upping this with a Bluetorial in a shameless act of self-promotion. 1/n
Reposted by Lionel Christiaen, PhD (he/him/his)
Around 70% of the U.S. economy depends on consumer spending. As wealth concentrates in the richest 10%, the rest of America can’t afford to buy enough to keep the economy running. This is a huge problem — and even America’s most powerful CEOs are starting to sound the alarm.
Our Economy Is in Danger. Here’s Why
Robert Reich
www.youtube.com
November 30, 2025 at 2:01 AM
Around 70% of the U.S. economy depends on consumer spending. As wealth concentrates in the richest 10%, the rest of America can’t afford to buy enough to keep the economy running. This is a huge problem — and even America’s most powerful CEOs are starting to sound the alarm.
Reposted by Lionel Christiaen, PhD (he/him/his)
But what is the environmental status of European waters? Consult the following paper for an overview:
👇
conbio.onlinelibrary.wiley.com/doi/full/10....
👇
conbio.onlinelibrary.wiley.com/doi/full/10....
November 27, 2025 at 5:49 PM
But what is the environmental status of European waters? Consult the following paper for an overview:
👇
conbio.onlinelibrary.wiley.com/doi/full/10....
👇
conbio.onlinelibrary.wiley.com/doi/full/10....
Reposted by Lionel Christiaen, PhD (he/him/his)
✨A gut feeling you’ll love this one 🐛 The anterior midgut of a Drosophila melanogaster 🪰larva puts on a confocal glow show! 🟢 Adult midgut progenitors 🔴 Actin 🔵 Nuclei 📸Image by Sapna Krishnakumar #FluorescenceFriday #Microscopy #DevBio
November 28, 2025 at 11:07 PM
✨A gut feeling you’ll love this one 🐛 The anterior midgut of a Drosophila melanogaster 🪰larva puts on a confocal glow show! 🟢 Adult midgut progenitors 🔴 Actin 🔵 Nuclei 📸Image by Sapna Krishnakumar #FluorescenceFriday #Microscopy #DevBio
Reposted by Lionel Christiaen, PhD (he/him/his)
🩵I always think art is such a powerful outlet. Rather its photography, sketching, painting, writing-ect. What matters is you are creating or capturing something only you can. It doesn’t matter if its good or bad. Just as long as you enjoy it🩵
#Macro #naturephotography #photography
#Macro #naturephotography #photography
November 29, 2025 at 1:21 AM
🩵I always think art is such a powerful outlet. Rather its photography, sketching, painting, writing-ect. What matters is you are creating or capturing something only you can. It doesn’t matter if its good or bad. Just as long as you enjoy it🩵
#Macro #naturephotography #photography
#Macro #naturephotography #photography
Reposted by Lionel Christiaen, PhD (he/him/his)
As Movember comes to an end, the Sars team sported real (and some suspiciously fake) mustaches to raise awareness for men’s health. Huge thanks to Brandon for leading this fundraising initiative at the Centre! 🥸
November 28, 2025 at 10:41 AM
As Movember comes to an end, the Sars team sported real (and some suspiciously fake) mustaches to raise awareness for men’s health. Huge thanks to Brandon for leading this fundraising initiative at the Centre! 🥸
Reposted by Lionel Christiaen, PhD (he/him/his)
Bah, who needs cohesin if you're at the right place (near). Grover once taught us the difference between near and far (my favourite Sesame Street piece), and now amazing work from @elphegenoralab.bsky.social led by @karissalhansen.bsky.social shows us how: www.science.org/doi/10.1126/...
Synergy between regulatory elements can render cohesin dispensable for distal enhancer function
Enhancers are critical genetic elements controlling transcription from promoters, yet how they convey regulatory information across large genomic distances remains unclear. Here, we engineer pluripote...
www.science.org
November 27, 2025 at 7:10 PM
Bah, who needs cohesin if you're at the right place (near). Grover once taught us the difference between near and far (my favourite Sesame Street piece), and now amazing work from @elphegenoralab.bsky.social led by @karissalhansen.bsky.social shows us how: www.science.org/doi/10.1126/...
To my fellow old farts: amplify junior PIs debuts. All of ‘em 🙌🏻👏🏻 all the best Maik, go get it.
So excited to share this as a new junior PI:
My brand-new lab website! 🎉🪰🌀
www.bischofflab.com
Please pass it on to young, motivated researchers looking for PhD positions 😊
And for the #FluorescenceFriday community: don’t miss the SciArt Gallery!
#CellBio #DevBio #PhDjob #PhDposition #Science
My brand-new lab website! 🎉🪰🌀
www.bischofflab.com
Please pass it on to young, motivated researchers looking for PhD positions 😊
And for the #FluorescenceFriday community: don’t miss the SciArt Gallery!
#CellBio #DevBio #PhDjob #PhDposition #Science
November 27, 2025 at 8:37 AM
To my fellow old farts: amplify junior PIs debuts. All of ‘em 🙌🏻👏🏻 all the best Maik, go get it.
Reposted by Lionel Christiaen, PhD (he/him/his)
The Thermal Ecology Alliance is growing rapidly and we are now at 51 countries! Join here: www.thermalecologyalliance.org/participation
November 26, 2025 at 9:04 AM
The Thermal Ecology Alliance is growing rapidly and we are now at 51 countries! Join here: www.thermalecologyalliance.org/participation
Reposted by Lionel Christiaen, PhD (he/him/his)
This is what I have lived my entire life in Europe. Why I never moved to the US, been offered many jobs, but the lack of proper health care, and the thought of my children being killed by some gun loon in school, kind of put me off. Proper health care is a human right, not a luxury.
November 26, 2025 at 5:38 AM
This is what I have lived my entire life in Europe. Why I never moved to the US, been offered many jobs, but the lack of proper health care, and the thought of my children being killed by some gun loon in school, kind of put me off. Proper health care is a human right, not a luxury.
Reposted by Lionel Christiaen, PhD (he/him/his)
November 25, 2025 at 2:58 PM
wow! 🤯
November 22, 2025 at 12:12 PM
wow! 🤯
Reposted by Lionel Christiaen, PhD (he/him/his)
Three more weeks to sign up!
#CellBio community, this one is for you! Applications are open for the #LakeConference on Modeling Life from Cells to Tissues – co-hosted with Circuit Neuroscience Basel!
📆 April 20-22, 2026
📍 Seattle, USA
🔬 All career stages welcomed.
Apply to attend by 12/12: alleninstitute.org/events/aics-...
📆 April 20-22, 2026
📍 Seattle, USA
🔬 All career stages welcomed.
Apply to attend by 12/12: alleninstitute.org/events/aics-...
2026 Lake Conference: Modeling Life from Cells to Tissues
Join the Allen Institute for Cell Science and Circuit Neuroscience Basel in Seattle, Washington, April 20–22, 2026, for a 3 day conference, Modeling...
alleninstitute.org
November 21, 2025 at 8:18 AM
Three more weeks to sign up!
Reposted by Lionel Christiaen, PhD (he/him/his)
SAVE THE DATE! Stoked to organize the 2026 Santa Cruz Developmental Biology Meeting with @rashmi-priya.bsky.social, @lowelab.bsky.social, and Shelbi Russell. Come learn about Biomedicine, Biomechanics, and the Biosphere, August 24-28, 2026. Registration dates, etc., coming soon! Please RT
November 19, 2025 at 8:23 PM
SAVE THE DATE! Stoked to organize the 2026 Santa Cruz Developmental Biology Meeting with @rashmi-priya.bsky.social, @lowelab.bsky.social, and Shelbi Russell. Come learn about Biomedicine, Biomechanics, and the Biosphere, August 24-28, 2026. Registration dates, etc., coming soon! Please RT
Webinar on the new ERC Plus Grants|ERC erc.europa.eu/news-events/...
Webinar on the new ERC Plus Grants
The ERC Plus Grants are a new funding scheme to support outstanding principal investigators with bold ideas and a vision for transformative research that goes beyond the scope o
erc.europa.eu
November 21, 2025 at 10:29 AM
Webinar on the new ERC Plus Grants|ERC erc.europa.eu/news-events/...
Reposted by Lionel Christiaen, PhD (he/him/his)
We are welcoming a new critter at the Centre - the Norwegian red sea cucumber! These colorful echinoderms will be featured in @emclaereboudt.bsky.social's #MSCActions project on chemosensation 🧪 Of course, they had a moment in the spotlight with our in-house photographer @alexandrejan.bsky.social ✨
It’s such a joy working with these beautiful animals 😍😍
Huge thanks to @alexandrejan.bsky.social for capturing my gorgeous little creatures!
Can’t wait to share more cuke science and photos soon — stay tuned!
@msarscentre.bsky.social
Huge thanks to @alexandrejan.bsky.social for capturing my gorgeous little creatures!
Can’t wait to share more cuke science and photos soon — stay tuned!
@msarscentre.bsky.social
November 18, 2025 at 1:01 PM
We are welcoming a new critter at the Centre - the Norwegian red sea cucumber! These colorful echinoderms will be featured in @emclaereboudt.bsky.social's #MSCActions project on chemosensation 🧪 Of course, they had a moment in the spotlight with our in-house photographer @alexandrejan.bsky.social ✨
Reposted by Lionel Christiaen, PhD (he/him/his)
Just published! Our Review on how immune cells masterfully orchestrate heart development and regeneration. Beyond fighting pathogens, they're actually building & repairing your heart! Learn how cutting-edge technologies are driving therapeutic opportunities here www.sciencedirect.com/science/arti...
Immune-mediated cardiac development and regeneration
The complex interplay between the immune and cardiovascular systems during development, homeostasis and regeneration represents a rapidly evolving fie…
www.sciencedirect.com
May 8, 2025 at 11:36 AM
Just published! Our Review on how immune cells masterfully orchestrate heart development and regeneration. Beyond fighting pathogens, they're actually building & repairing your heart! Learn how cutting-edge technologies are driving therapeutic opportunities here www.sciencedirect.com/science/arti...
Reposted by Lionel Christiaen, PhD (he/him/his)
🐠 Medaka (Oryzias latipes) ✨ A tiny fish with big developmental insights! 🧬 Medaka is perfect for studying sex determination, germ cell development, pigmentation, and environmental effects on embryos 📸 Image by Philipp Keller #ModelMonday #DevBio #EvoDevo
November 17, 2025 at 7:08 PM
🐠 Medaka (Oryzias latipes) ✨ A tiny fish with big developmental insights! 🧬 Medaka is perfect for studying sex determination, germ cell development, pigmentation, and environmental effects on embryos 📸 Image by Philipp Keller #ModelMonday #DevBio #EvoDevo
Pretty sure some people do that too in the form of Spanish tapas. 🦑
Hawaiian Short-Finned Pilot Whales Eat Nearly 600 Million Squid Per Year Between Them, Diving Incredible Depths To Do So | IFLScience 🦑🧪🌎
This Whale’s Meal Plan? Over 70,000 Squid A Year, And It’ll Dive Incredible Depths To Get Them
That adds up to around 88,000 tonnes of squid per year for the entire Hawaiian short-finned pilot whale population.
www.iflscience.com
November 16, 2025 at 8:59 AM
Pretty sure some people do that too in the form of Spanish tapas. 🦑
Reposted by Lionel Christiaen, PhD (he/him/his)
Hawaiian Short-Finned Pilot Whales Eat Nearly 600 Million Squid Per Year Between Them, Diving Incredible Depths To Do So | IFLScience 🦑🧪🌎
This Whale’s Meal Plan? Over 70,000 Squid A Year, And It’ll Dive Incredible Depths To Get Them
That adds up to around 88,000 tonnes of squid per year for the entire Hawaiian short-finned pilot whale population.
www.iflscience.com
November 15, 2025 at 6:28 PM
Hawaiian Short-Finned Pilot Whales Eat Nearly 600 Million Squid Per Year Between Them, Diving Incredible Depths To Do So | IFLScience 🦑🧪🌎
Reposted by Lionel Christiaen, PhD (he/him/his)
Don't be evil?
"Google is hosting a CBP app that uses facial recognition to identify immigrants, and tell local cops whether to contact ICE about the person, while simultaneously removing apps designed to warn local communities about the presence of ICE officers..."
www.404media.co/google-has-c...
"Google is hosting a CBP app that uses facial recognition to identify immigrants, and tell local cops whether to contact ICE about the person, while simultaneously removing apps designed to warn local communities about the presence of ICE officers..."
www.404media.co/google-has-c...
Google Has Chosen a Side in Trump's Mass Deportation Effort
Google is hosting a CBP app that uses facial recognition to identify immigrants, while simultaneously removing apps that report the location of ICE officials because Google sees ICE as a vulnerable gr...
www.404media.co
November 16, 2025 at 2:41 AM
Don't be evil?
"Google is hosting a CBP app that uses facial recognition to identify immigrants, and tell local cops whether to contact ICE about the person, while simultaneously removing apps designed to warn local communities about the presence of ICE officers..."
www.404media.co/google-has-c...
"Google is hosting a CBP app that uses facial recognition to identify immigrants, and tell local cops whether to contact ICE about the person, while simultaneously removing apps designed to warn local communities about the presence of ICE officers..."
www.404media.co/google-has-c...
Re-upping this with a Bluetorial in a shameless act of self-promotion. 1/n
Cell cycle-driven transcriptome maturation confers multilineage competence to cardiopharyngeal progenitors
Wei Wang, @lionlchristiaen.bsky.social and colleagues
www.embopress.org/doi/full/10....
Wei Wang, @lionlchristiaen.bsky.social and colleagues
www.embopress.org/doi/full/10....
November 15, 2025 at 8:15 AM
Re-upping this with a Bluetorial in a shameless act of self-promotion. 1/n
Reposted by Lionel Christiaen, PhD (he/him/his)
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/...
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 14, 2025 at 8:41 AM
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/...
Reposted by Lionel Christiaen, PhD (he/him/his)
We are pleased to announce our next #SEBD2026 meeting! The meeting will take place in El Rompido, Huelva, from the 28th to the 30th of October 2026 #savethedate @cabd-upo-csic.bsky.social @isdb.bsky.social @gfeev.bsky.social @ijdb.bsky.social @devbiol.bsky.social @devdynamics.bsky.social
November 14, 2025 at 7:53 AM
We are pleased to announce our next #SEBD2026 meeting! The meeting will take place in El Rompido, Huelva, from the 28th to the 30th of October 2026 #savethedate @cabd-upo-csic.bsky.social @isdb.bsky.social @gfeev.bsky.social @ijdb.bsky.social @devbiol.bsky.social @devdynamics.bsky.social
Reposted by Lionel Christiaen, PhD (he/him/his)
Very insightful talk by Dean Gunn Mangerud, who shared the latest updates and upcoming projects at our faculty @scienceandtechuib.bsky.social 👏 We are grateful for this opportunity to have an open dialogue, and look forward to new exciting challenges @unibergen.bsky.social!
November 14, 2025 at 10:42 AM
Very insightful talk by Dean Gunn Mangerud, who shared the latest updates and upcoming projects at our faculty @scienceandtechuib.bsky.social 👏 We are grateful for this opportunity to have an open dialogue, and look forward to new exciting challenges @unibergen.bsky.social!
Reposted by Lionel Christiaen, PhD (he/him/his)
International scientists constitute the engine of much of the most exciting US science. My friend Sonali Majumdar has written precisely the kind of guide that international scientists crave in order succeed as resilient and brilliant scientists. Check it out! @sonali-m-19.bsky.social
November 13, 2025 at 2:18 AM
International scientists constitute the engine of much of the most exciting US science. My friend Sonali Majumdar has written precisely the kind of guide that international scientists crave in order succeed as resilient and brilliant scientists. Check it out! @sonali-m-19.bsky.social