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Jean-Charles Lambert

@jclambert.bsky.social
881 followers 408 following 86 posts

Team leader, neuroscientist specialized in genetics and post-genomics of Alzheimer’s disease. in EN or/ou en FR 🇫🇷🇪🇺🏳️‍🌈

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Jean-Charles Lambert @jclambert.bsky.social · 14/08/2026
Finally out in Nature genetics! Our results reveal a novel role for the Alzheimer genetic risk factor PLCG2. Its neuronal Downregulation (or very rare Loss-of-function variants) seem to promote increased Aβ secretion, Tau hyperphosphorylation, and synaptic dysfunction www.nature.com/articles/s41...
nature.com
PLCG2 downregulation impairs synaptic function and increases Alzheimer’s disease hallmarks in neuronal cultures - Nature Genetics
This study demonstrates that downregulation of PLCG2, primarily in neurons, impairs synaptic function and elevates amyloid-β levels and Tau protein phosphorylation.
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Jean-Charles Lambert @jclambert.bsky.social · 24/10/2025
This indicates that assessing the sensitivity of results of GWAS (or GWAS secondary analyses, especially those based on genome-wide statistics) on clinically-diagnosed cases will become increasingly important as the proportion of proxy and biobank cases included in the GWAS increases.
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Jean-Charles Lambert @jclambert.bsky.social · 24/10/2025
In this preprint, the main consortia working on Alzheimer GWAS combined their efforts to validate an detect new loci associated with AD risk. We observed 91 genome-wide significant signals (16 nove) . Among these 91 loci, 56 of them are specifically detected in clinically diagnosed AD cases.
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Conceicao Bettencourt @saobettencourt.bsky.social · 27/08/2025
🚨Join our next @DEMONNetworkUK #Genetics and #Omics meeting on THURSDAY 11th September at 2.30 PM (UK Time). Delighted to have @jclambert.bsky.social‬ as invited speaker – “From #GWAS to polygenic risk scores in #Alzheimer's disease” Join the network or DM for more info
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Jean-Charles Lambert @jclambert.bsky.social · 24/08/2025
In this preprint led by Devrim Kilinc and Pierre Dourlen, we observed that differential expression of BIN1 isoforms in the presynaptic part leads to differential synaptotoxicity. BIN1 isoforms could contribute to the synaptic loss observed in Alzheimer's disease. www.biorxiv.org/content/10.1...
biorxiv.org
BIN1 expression in the presynaptic compartment leads to isoform-specific synaptotoxicity
Alzheimer’s disease (AD) is characterized by a strong genetic predisposition and by an early loss of synaptic connectivity that strongly correlates with cognitive deficit. Some genetic determinants co...
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Jean-Charles Lambert @jclambert.bsky.social · 24/08/2025
In this preprint, primarily conducted by Dolores Siedlecki, we established a neuron-microglia co-culture model within the synaptic chamber of a microfluidic device. This compartmented approach enables us to study synapse phagocytosis in close proximity to microglia. www.biorxiv.org/content/10.1...
biorxiv.org
Inflammation-enhanced synapse-specific phagocytosis by adult APP microglia in a microfluidic neuron–microglia co-culture model
Microglia play a critical role in synapse remodeling and neuroinflammation, both of which are dysregulated in Alzheimer′s disease (AD). However, most in vitro models rely on neonatal or immortalized m...
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Jean-Charles Lambert @jclambert.bsky.social · 13/08/2025
Perhaps 😉 I am sure that this controversy over APOE4 did not last long. However, it's true that he insisted, despite the odds being stacked against him, that it was TOMM40, not APOE, that was ultimately responsible for the APOE locus signal.
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Jean-Charles Lambert @jclambert.bsky.social · 13/08/2025
Why do you say that the research community was sceptical? In fact, it was one of the least controversial genetic results obtained through a gene candidate approach. It was very quickly accepted by the research community because it was systematically replicated.
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Reese Richardson @reeserichardson.bsky.social · 04/08/2025
Today, our article "The entities enabling scientific fraud at scale are large, resilient, and growing rapidly" is finally published in PNAS. I hope that it proves to be a wake-up-call for the whole scientific community. reeserichardson.blog/2025/08/04/a...
reeserichardson.blog
A do-or-die moment for the scientific enterprise
Reflecting on our paper “The entities enabling scientific fraud at scale are large, resilient, and growing rapidly”
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Jean-Charles Lambert @jclambert.bsky.social · 02/08/2025
In this new EADB preprint led by Ole Andreassen, we present an improved polygenic hazard score model for AD that demonstrates enhanced predictive accuracy for age of onset in European populations compared to alternative models. www.medrxiv.org/content/10.1...
medrxiv.org
Polygenic Hazard Score for Predicting Age-associated Risk of Alzheimer’s Disease in European Populations: Development and Validation
Objectives Polygenic hazard score (PHS) models can be used to predict the age-associated risk for complex diseases, including Alzheimer’s disease (AD). In this study, we present an improved PHS model ...
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Jean-Charles Lambert @jclambert.bsky.social · 30/07/2025
Happy cat on my belly
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Jean-Charles Lambert @jclambert.bsky.social · 23/07/2025
A new EADB paper published in Nature Communications and led by Kristel Van Steen, Cornelia Van Duijn and Valentina Escott-Price. We report that machine learning methods have the potential to uncover novel loci that remain undetected by traditional GWAS in Alzheimer. www.nature.com/articles/s41...
nature.com
Machine learning in Alzheimer’s disease genetics - Nature Communications
Here the authors apply machine learning approaches to Alzheimer’s genetics, confirm known associations and suggest novel risk loci. These methods demonstrate predictive power comparable to traditional...
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Jean-Charles Lambert @jclambert.bsky.social · 19/07/2025
Cette université est trop occupée à sauver la Science en accueillant des chercheurs américains
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Mike Dailly ™ @mdf200.bsky.social · 18/06/2025
FromFB: 😂
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
5. The PGS/PRS associations mainly capture genetic information related to AD because they weakened as the diagnosis was broadened. The quality of the clinical diagnosis can interfere with the measurement of the association between the PGS/PRS and the AD risk in a given population.
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
4. However, this is not the case when the PRS includes the APOE region. This indicates that the APOE region appears to contain additional multi-ancestry genetic variability.
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
3. In contrast to other multifactorial diseases, a cross-ancestry polygenic risk score (PRS) did not systematically outperform the simple PGS when the APOE locus was excluded. A high proportion of AD genetic risk could be already accounted for by the European-ancestry GWAS-defined loci.
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
2. This simple PGS appears to be enough to detect an AD genetic risk in most ancestry populations, suggesting that most of the various ancestry populations are likely to be affected by shared pathophysiological processes that are driven in part by genetic risk factors.
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
Our work produced several important findings: 1. The associations between a simple polygenic score (PGS) based on the European GWAS-defined loci and AD risk in European populations is slightly influenced by the APOE genotype, suggesting existence of independent genetic entities for sporadic AD
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
This work would not have been possible without this global and strongly collaborative effort (particularly Richard Sherva and Mark Logue of the Million Veteran Programme in the US, and Yoontae Kim and Jungsoo Gim of the GARD study in South Korea).
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Jean-Charles Lambert @jclambert.bsky.social · 18/06/2025
Finally out in Nature genetics ! A long journey to have this paper published. Led by my team, under the EADB umbrella (eadb.eu), the project involved numerous partners worldwide in assessing the genetic complexity of Alzheimer in populations of diverse ancestries. www.nature.com/articles/s41...
nature.com
Transferability of European-derived Alzheimer’s disease polygenic risk scores across multiancestry populations - Nature Genetics
Polygenic risk scores for Alzheimer’s disease derived from individuals of European ancestry can show improved performance in multiancestry settings after incorporating genome-wide association summary ...
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Ian Kremer @wolverinebear.bsky.social · 15/06/2025
Trump’s cuts to more than 1700 #NIH grants get court hearing www.science.org/content/arti... by @sarareardon.bsky.social @science.org #Alzheimers #dementia #neuroscience #science
science.org
Trump’s cuts to more than 1700 NIH grants get court hearing
District judge could declare terminations unlawful—or toss suit based on technicalities
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Andy Moore @aaandmoore.bsky.social · 11/06/2025
This is a cumulative maximum intensity projection movie of the endoplasmic reticulum labeled with the membrane marker mEmerald-Sec61B.
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Tal Nuriel, PhD @talnuriel.bsky.social · 10/06/2025
Announcing an official fundraising campaign to support my lab’s research on APOE4 and Alzheimer’s disease: joinus.cuimc.columbia.edu/participant/.... This campaign is itself an experiment of sorts. But mostly, it's an attempt to save my lab during an unprecedented time of turmoil in academia. 1/9
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Ian Kremer @wolverinebear.bsky.social · 06/06/2025
Here is a direct link to the open access article ‪@amit-das.bsky.social‬ mentions. alz-journals.onlinelibrary.wiley.com/doi/10.1002/... Tempting to say it feels like a miracle, but this progress always comes down to dedicated study participants, brilliant scientists, and reliably funded science.
alz-journals.onlinelibrary.wiley.com
The history of Down syndrome–associated Alzheimer's disease; past, present, and future
The landscape of Down syndrome–associated Alzheimer's disease (DSAD) research reflects decades of scientific endeavor and collaborative effort, charting a remarkable journey from initial observation...
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linda2.bsky.social @linda2.bsky.social · 24/05/2025
I went in search of cygnets. Still not hatched so had to make do with a heron fishing instead. Look at those feet! #UKWildlife #UKbirding #Birds #Photography #Nature #GreyHeron #photographersunited #PhotographersofBluesky #Sonyalpha
A grey heron stalking the waters for fish. Beak is low to the surface of the water. The heron has also sighted a fish and moves slowly not to disturb the water.
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Jean-Charles Lambert @jclambert.bsky.social · 22/05/2025
Currently visiting the Medieval Museum in Barcelona. This was painted in 1210…
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Jean-Charles Lambert @jclambert.bsky.social · 21/05/2025
Je l’ai lu tout à l’heure. Sans concession et loin des messages en creux adressés aux initiés dans ce gène de rapport. Et clairement indiqué l’activité néfaste de l’IHU durant le Covid
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Jean-Charles Lambert @jclambert.bsky.social · 12/05/2025
In this report, to improve our understanding of the genetic architecture of AD in the context of its main genetic driver, the EADB consortium and collaborators performed the largest global genome-wide association studies stratified by ε4 and ε2 carrier status. www.medrxiv.org/content/10.1...
medrxiv.org
APOE stratified genome-wide association studies provide novel insights into the genetic etiology of Alzheimers’s disease
Among the more than 90 identified genetic risk loci for late-onset Alzheimer’s disease (AD) and related dementias, the apolipoprotein E gene ( APOE ) ɛ2/ɛ3/ɛ4 polymorphism remains the longstanding ben...
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Jean-Charles Lambert @jclambert.bsky.social · 29/04/2025
And definitively accepted after more than a month of editing to meet all the publisher's requirements.
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Trends in Neurosciences @cp-trendsneuro.bsky.social · 29/04/2025
'BIN1 and Alzheimer’s disease: the tau connection' by Pierre Dourlen, Devrim Kilinc, Isabelle Landrieu, Julien Chapuis & Jean-Charles Lambert @jclambert.bsky.social www.cell.com/trends/neuro...
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Jean-Charles Lambert @jclambert.bsky.social · 22/04/2025
When I was a student, I dreamed of one day publishing in Trends In Neurosciences. So I'm proud that we had the opportunity to write an invited review on BIN1, a major genetic determinant of Alzheimer's disease that we've been working on for over 10 years. www.sciencedirect.com/science/arti...
sciencedirect.com
BIN1 and Alzheimer’s disease: the tau connection
Bridging integrator 1 (BIN1) is a ubiquitously expressed protein that plays a critical role in endocytosis, trafficking and cytoskeletal dynamics. In …
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Oregon 🕎🎲 @oregonthedm.bsky.social · 18/04/2025
Quick guide to understand your cat
Nalvk cat with F D besides it's head
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Vincent Planche @vincentplanche.bsky.social · 17/04/2025
am pleased to share our letter, highlighting that the science does not yet support regulatory approval of amyloid-targeting therapies for AD based solely on biomarker evidence. alz-journals.onlinelibrary.wiley.com/doi/full/10....
alz-journals.onlinelibrary.wiley.com
The science does not yet support regulatory approval of amyloid‐targeting therapies for Alzheimer's disease based solely on biomarker evidence
Click on the article title to read more.
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Jean-Charles Lambert @jclambert.bsky.social · 15/04/2025
She's 8 years old and it sometimes seems like she still looks like a teenage cat. Admittedly, she's a very small size
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Centre d'Infection et d'Immunité de Lille @ciilofficiel.bsky.social · 14/03/2025
Join us at @pasteurlille.bsky.social ! We're hiring a Facility Manager specializing in human iPSCs, organoids, and organ-on-chip technologies. Drive innovation in cutting-edge biomedical research. Apply now! Contact Dr Alexandre Grassart #CDP @univlille.bsky.social @cnrs-hautsdefrance.bsky.social
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Institut Pasteur de Lille @pasteurlille.bsky.social · 07/03/2025
📣 Stand Up for Science 2025 à l'Institut Pasteur de Lille parce que la science est un bien commun. 📣 Plus d'infos sur le mouvement 👉 standupforscience.fr #pasteurlille
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Jean-Charles Lambert @jclambert.bsky.social · 07/03/2025
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Adam Schwarz @adamjschwarz.bsky.social · 05/03/2025
French Senator Claude Malhuret: "Washington has become Nero’s court, with an incendiary emperor, submissive courtiers and a jester high on ketamine... We were at war with a dictator, we are now at war with a dictator backed by a traitor."
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Jean-Charles Lambert @jclambert.bsky.social · 02/03/2025
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Jean-Charles Lambert @jclambert.bsky.social · 02/03/2025
Il y a quelques temp, j’avais vu un message de @damienbarraudmd.bsky.social à propos de la serie “The Pitt”…J’ai commencé à la regarder. Je ne peux juger de sa veracité mais elle a quelque chose en plus je trouve … une vraie humanité et une certaine forme de simplicité (bon c’est quand même un show)
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Jean-Charles Lambert @jclambert.bsky.social · 01/03/2025
Finally accepted “in principle” In Nature Genetics … 18 months of hard works because of massive revisions (that strongly improved the manuscript to be honest). A long journey finally successful. What a relief …
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Garry Kasparov @garrykasparov.bsky.social · 28/02/2025
Zelensky is a wartime leader watching his people suffer and die under Russian attacks every day. To be lectured and lied to by Trump and Vance, as they defend the war criminal dictator committing these atrocities, is unimaginable agony. An everlasting shame for America.
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Jean-Charles Lambert @jclambert.bsky.social · 28/02/2025
Dear American friends I'm not sure you realise what a disaster we have just witnessed today. The US is on Russia's side, and we have understood this once and for all A page has probably been turned between Europe and the USA It is a sad day
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Nicolas Villain @nvillain-alz.bsky.social · 26/02/2025
1/ NEW: Lecanemab in France The French Federation of Memory Clinics just released its appropriate use recommendations for #Lecanemab in early #Alzheimers. What’s new? How does it compare to U.S. guidelines? A thread 🧵⬇️ www.sciencedirect.com/science/arti...
sciencedirect.com
Lecanemab for early Alzheimer's disease: Appropriate use recommendations from the French federation of memory clinics
Lecanemab, a monoclonal antibody targeting β-amyloid protofibrils, has shown promising results in a Phase III clinical trial for the treatment of earl…
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Eliot Higgins @eliothiggins.bsky.social · 22/02/2025
Daily reminder of who Musk is:
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Mike Greicius @mikegreicius.bsky.social · 21/02/2025
Alzheimer's research funding is in the DOGE crosshairs, putting invaluable datasets (including tens of thousands of genomes) and biorepositories at risk. This reflects the volunteer efforts of thousands of research participants over four decades. Please contact your reps/senators. Hands off NIH.
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Jean-Charles Lambert @jclambert.bsky.social · 17/02/2025
Non non ca avance de plus en plus vite ! Des biomarqueurs sanguins arrivent, notre compréhension de la maladie s’accélère entre autre par la génétique .. il y a des raisons objectives d’être optimiste !
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Jean-Charles Lambert @jclambert.bsky.social · 17/02/2025
La prise en charge existe même si plutôt de l’accompagnement (et un manque de moyens evident). - Pour les labos pharma, trop compliqués, trop d’echecs mais ils reviennent. Le marché est énorme. - Pour la recherche, elle a vraiment commencé à là fin des années 1980 et depuis assez peu financé
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