Lucas Waltzer
@lucaswaltzer.bsky.social
1.8K followers 710 following 140 posts
Group leader at iGReD Clermont-Ferrand, drosophila & epigenetics, food & mushrooms https://www.igred.fr/en/team/ero-epigenetic-regulations-ontogenesis/
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Reposted by Lucas Waltzer
crick.ac.uk
We're now recruiting early career group leaders at the Crick to lead ambitious research programmes and explore bold scientific questions.

Hear our Director, Edith Heard, explain why the Crick is a unique place for curiosity-driven research.

Apply now ➡️ www.crick.ac.uk/careers-stud...
Reposted by Lucas Waltzer
merianelion.bsky.social
🚨Preprint🚨
What started as an attempt to compare CT scans of diverse fly brains, ended up a new concept for analysis & segmentation of difficult tomographic data. No ground truths, no training, just maths. This is TopoTome, topological data analysis of 3D images

www.biorxiv.org/content/10.1...
Figure showing 3 panels. Panel A: workflow of a classical deep learning model vs TopoTome workflow, with marked differences between the methods, including manual segmentation of images, design and optimization of neural network and data post processing that is needed in deep learning workflow but not in TopoTome. Panel B: core concepts behind TopoTome shown connected by arrows. From left to right, there is a microCT scan of a fly brain (3D reconstruction), a persistence barcode of H2 homologies, an image of how persistent barcodes map to the original CT brain scan, and a segmentation of a CT scan. Panel C shows the concept of cubical complex filtration of 2D and 3D image data.
Reposted by Lucas Waltzer
flybase.bsky.social
Searches and tools are currently down for FlyBase.org. Our developers are working on getting us back up.
FlyBase Homepage
FlyBase: a database for drosophila genetics and molecular biology
FlyBase.org
Reposted by Lucas Waltzer
sedonamurphy.bsky.social
If you’re interested in exploring the relationship between chromatin organization and epigenetic memory using chromatin tracing microscopy, my group is recruiting a talented PhD student 🥳
molgen.mpg.de
🚨 Please share! We are seeking motivated PhD students who wish to work at the intersection of molecular life sciences and computational sciences.
#IMPRS #IMPRSBAC @freieuniversitaet.bsky.social @maxplanck.de
Check out our projects and apply by Jan 7th, 2026!
www.molgen.mpg.de/IMPRSPhDproj...
Reposted by Lucas Waltzer
Reposted by Lucas Waltzer
ribeirocarlitos.bsky.social
Interesting how companies and the financial world is racing to spend mindboggling amounts of money to build the infrastructure to train computers. But we are leaving the infrastructure to train and educate humans crumbling. The question is who will train who?
a man in a suit is holding a jacket and a cigarette .
ALT: a man in a suit is holding a jacket and a cigarette .
media.tenor.com
Reposted by Lucas Waltzer
micromotility.bsky.social
Very sad to hear that Sir John Gurdon, former Master of Magdalene College, has passed away at the age of 92. www.cam.ac.uk/research/new...

Here is a powerful reminder that you should never give up on your dreams.
lucaswaltzer.bsky.social
Congratulations, exciting reads!
Reposted by Lucas Waltzer
jamesbriscoe.bsky.social
Very sad news, John Gurdon has died.

A developmental biologist's developmental biologist, Nobel prize winner

His work is the foundation of much of today's dev & stem cell bio.

An inspiration to many, including me. Always asking questions & wanting the answers

www.magd.cam.ac.uk/news/profess...
Professor Sir John Gurdon FRS (1933-2025) | Magdalene College
Magdalene College is deeply saddened to announce the death of Professor Sir John Gurdon FRS, who served as Master of the College from 1995 to 2002.
www.magd.cam.ac.uk
lucaswaltzer.bsky.social
I must disagree: the Clermont-Ferrand/ Paris is and will remain the worst French train line, with delay regularly above 3 hours!! May be Marseille Bordeaux has a higher rate of delay, but we have long ones!! A free night in the train is always an option here!
Reposted by Lucas Waltzer
kojamf.bsky.social
Dr. Jane Goodall filmed an interview with Netflix in March 2025 that she understood would only be released after her death.
Reposted by Lucas Waltzer
cyrilpedia.bsky.social
,While these articles and blog posts have appeared in different media ...() they all share commonalities, such as similar introductions, trying to discredit the targeted scientists’ expertise, or question their neutrality or integrity, and seem to be generated by chatbots.'
Scientists targeted by dark PR tactics: Several academic scientists critical of de-extinction projects have become the targets of anonymous smear articles and weaponized copyright infringement claims:...
EMBO Press is an editorially independent publishing platform for the development of EMBO scientific publications.
www.embopress.org
Reposted by Lucas Waltzer
crisprflydesign.bsky.social
High levels of Cas9 are toxic in sensory neurons. Reducing Cas9 levels with uORFs avoids toxicity and is compatible with efficient editing. From @thompsonpeerlab.bsky.social. Fly lines @vdrc-flies.bsky.social

#CRISPR #Drosophila

www.biorxiv.org/content/10.1...
Figure from the preprint showing sensory neuron morphology with different levels of Cas9 expression.
lucaswaltzer.bsky.social
= telomeres elongate in hybrid embryos only when maternal telomeres are short and paternal telomeres are long. In the reciprocal cross, telomeres shorten !!!
levine-lab.bsky.social
Check out this new Levine-Lampson collaboration, led by the talented Hyuk-Joon Jeon.

We explored the consequences of inheriting long telomeres from dad and short telomeres from mom. Or the reciprocal. Turns out, parent-of-origin matters (in mice, at least).

authors.elsevier.com/c/1loW-3QW8S...
authors.elsevier.com
Reposted by Lucas Waltzer
cyrilpedia.bsky.social
'Innovation does not occur in a vacuum. It requires raw materials: the findings of basic research. We are currently burning through a stockpile of knowledge accumulated during a more enlightened era of public investment, while allocating insufficient resources for replenishing it.'
For the love of frontier research, or why Elon’s rockets keep blowing up | EMBO reports
EMBO Press is an editorially independent publishing platform for the development of EMBO scientific publications.
www.embopress.org
Reposted by Lucas Waltzer
Reposted by Lucas Waltzer
flybase.bsky.social
There's an update on the state of FlyBase on the FlyBase.org front page. You can contribute to FlyBase at this link wiki.flybase.org/wiki/FlyBase...
We express enormous gratitude to the people, labs, groups, and foundations who have already helped us.
#FlyBase #Drosophila
FlyBase Update – October 2025
The termination of the NIH/NHGRI FlyBase grant has placed the long-term sustainability of FlyBase at risk. However, thanks to the generous support of several key individuals and institutions, we are pleased to announce that FlyBase will remain operational through the coming year. We extend our deepest gratitude to Yukiko Yamashita, Cassandra Extavour, Hugo Bellen, Thom Kaufman, the Genetics Society of America / Drosophila Board, the Bloomington Drosophila Stock Center, an anonymous donor and the Wellcome Trust. We are especially thankful for a generous gift from Seemay Chou, Jed McCaleb, and The Navigation Fund. We also greatly appreciate the continued support from the broader Drosophila community – your donations and service fees have been vital in helping us stay afloat. Special thanks also go to Jessica Manning for her tireless administrative work at Harvard, to Ruth Lehmann, Hugo Bellen, and Paul Sternberg for advice and efforts, and to the Board of the European Drosophila Society for all their efforts. Sadly, we must also share that several long-standing FlyBase team members have recently moved on. We are immensely grateful to Susan Russo-Gelbart, Lynn Crosby, Gil dos Santos, Kris Broll, Victoria Jenkins, and TyAnna Lovato for their many years of dedicated service and contributions to FlyBase. Looking ahead, ensuring FlyBase’s sustainability beyond the next year – and successfully integrating with the Alliance – will require new funding sources. We kindly ask for your continued support:
	•	European labs: Please consider contributing to the Cambridge, U.K. FlyBase group
	•	U.S. and other non-European labs: Please consider contributing to the U.S. FlyBase groups
	•	Both U.K. and U.S. FlyBase are working diligently to establish an invoicing system. We appreciate your continued patience.
For more information on how to support us, please visit: Contribute to FlyBase wiki page https://wiki.flybase.org/wiki/FlyBase:Contribute_to_FlyBase
Reposted by Lucas Waltzer
the-node.bsky.social
The Kahneman Chronicles: Lessons from a Fly Lab

Entertaining post from @sameerthukral.bsky.social kicking of a series imagining what would transpire if Daniel Kahneman—the “grandfather of behavioural economics”—took a sabbatical and worked in a fly lab. 🪰

thenode.biologists.com/the-kahneman...
The Kahneman Chronicles: Lessons from a Fly Lab - the Node
The Kahneman Chronicles #1: When a Nobel Laureate Fixed Our Lab's Scheduling Disasters Daniel Kahneman (1934-2024) was a legendary psychologist who
thenode.biologists.com
Reposted by Lucas Waltzer
tommytang.bsky.social
Your data is lying to you. Here’s how technical artifacts distort biology—and how to see the truth. 👇
1/ Beautiful t-SNE? Shiny heatmap?
Look closer.
Technical artifacts can fake whole cell types.
Here’s where the ghosts hide.
lucaswaltzer.bsky.social
Congratulations @oliviermathieu.bsky.social and colleagues @igred.fr !! #epigenetics #arabidopsis
cnrsbiologie.bsky.social
#ResultatScientifique 🔎 L'équilibre entre activation et répression des gènes est crucial pour le développement et chez les plantes ils existent des protéines "gardiennes" de ce mécanisme !

✍️ O. Mathieu & G. Moissiard
👉 L'article dans @natplants.nature.com
buff.ly/v7R7mbj
Des protéines « gardiennes » préservent l’expression des gènes chez les plantes
Chez les organismes multicellulaires, l'équilibre entre l’activation et la répression des gènes est crucial pour le développement.
www.insb.cnrs.fr