Sign in

Joseph Castellano

@jmcastell.bsky.social
923 followers 377 following 24 posts

Associate Professor & PI (castellanolab.org) @SinaiBrain / @IcahnMountSinai, Neuroscientist studying blood to brain communication in aging and Alzheimer's disease

PostsRepliesMedia
Joseph Castellano @jmcastell.bsky.social · 12/08/2026
Happy to share the lab's latest work characterizing the impact of a youth-associated protein on microglial function. Congrats to 1st author Brittany Hemmer, w/ excellent contributions f/ Sarah Philippi and all co-authors! @sinaibrain.bsky.social Paper: www.nature.com/articles/s41...
nature.com
Youth-associated protein TIMP2 regulates microglial state and function in healthy and aged mice - Nature Communications
Aging disrupts microglial function, but factors that rejuvenate these cells are poorly characterized. Here, the authors show the youth-associated protein TIMP2 revitalizes microglia by altering inflam...
063 0
Joseph Castellano @jmcastell.bsky.social · 20/04/2026
Awesome study - congrats, Shannon and team!
000 0
Joseph Castellano @jmcastell.bsky.social · 02/04/2026
Congrats, Celeste!
010 0
Reposted by Joseph Castellano
NY-CURES @nycures.bsky.social · 04/09/2025
🚀 NY-CURES Launch — Championing State-Wide Investment in Science! 🚀 Our new coalition advocates for sustained public support of New York’s vibrant biomedical research ecosystem — creating cures, economic gains & strengthening communities. Sign up. Stay informed. Join the movement: www.nycures.org/
44955 0
Joseph Castellano @jmcastell.bsky.social · 14/06/2025
Thanks, Silvia!
010 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
Thanks, Sandro - hope you're well!
010 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
Overall, our work supports that TIMP2 (and likely other unexplored youth-associated factors) could be important for reducing microglial dysfunction in age-related disorders. Thanks for reading! (end).
000 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
TIMP2 ⬇️ microglial activation, ⬆️ phagocytosis, and ⬇️ the proportion of microglia associated with deleterious processes, including pro-inflammatory processes and senescence—essentially reversal of several age-associated microglial phenotypes. (5/n)
100 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
Since key changes in microglia are seen regardless of which TIMP2 pool is targeted, we wondered if ⬆️the extracellular pool mitigates age-related microglial changes. Since TIMP2 gets into brain f/ blood, we gave aged mice systemic TIMP2 injections. (4/n)
100 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
TIMP2 deficiency ⬆️microgliosis, ⬇️phagocytosis, and induces transcriptomic changes associated w/ activation + cytokine production. Hippocampal microdialysis revealed that TIMP2 loss ⬆️cellular stress and inflamm. proteins in the extracellular space. (3/n)
100 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
We prev. found that TIMP2 regulates hippocampal plasticity. Since microglia regulate plasticity, we looked at how differing TIMP2 sources affect microglial state and function by targeting global, neuronal, and microglial contributions to the TIMP2 pool. (2/n)
100 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
Excited to share a new preprint out from the lab (www.biorxiv.org/content/10.1...) by 1st-author Brittany Hemmer, a newly minted PhD from the lab! A brief thread on what we found (1/n):
biorxiv.org
Youth-associated protein TIMP2 alters microglial state and function in the context of aging
There is little understanding of how aging serves as the strongest risk factor for several neurogenerative diseases. Specific neural cell types, such as microglia, undergo age-related maladaptive chan...
161 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
Special thanks to her fantastic committee, incl. her committee chair Anne Schaefer (pictured), @scottrussophd.bsky.social , @mcalpinelab.bsky.social , and @cheadlelab.bsky.social for invaluable guidance. She's seeking postdoc opps. in the Boston area (incl. NH/RI)—reach out if interested!
250 0
Joseph Castellano @jmcastell.bsky.social · 13/06/2025
🎉Thrilled to announce that my awesome PhD student, @brittany_hemmer , successfully defended her thesis! Her thesis work is now preprinted (brief summary to follow)—proud of her hard work and perseverance!
2100 0
Reposted by Joseph Castellano
Charleston Conference on Alzheimer's Disease (CCAD) @the-ccad.bsky.social · 17/04/2025
Join us on Monday, April 21st for our next #ZoomYourCareer webinar, "The Future of #AI in Research “Is #ChatGPT Smarter than Me?” with #CCAD alumni speakers Shea Andrews and @trajnp.bsky.social! Registration 🔗 us02web.zoom.us/meeting/regi... #NewVisionResearch #ProfessionalDevelopment
034 0
Reposted by Joseph Castellano
Prof Malú Gámez Tansey @malutansey.bsky.social · 10/04/2025
Zoom your career 🤓🧠🧬https://us02web.zoom.us/meeting/register/tIp9vIuwSF2LJydcdpDIxQ#/registration
us02web.zoom.us
Welcome! You are invited to join a meeting: The Future of AI in Research “Is ChatGPT Smarter than Me?”. After registering, you will receive a confirmation email about joining the meeting.
Welcome! You are invited to join a meeting: The Future of AI in Research “Is ChatGPT Smarter than Me?”. After registering, you will receive a confirmation email about joining the meeting.
046 0
Reposted by Joseph Castellano
Towfique Raj @trajnp.bsky.social · 09/04/2025
Fantastic talks at #CCAD2025 Reunion Conference! @sinaibrain.bsky.social @jmcastell.bsky.social, Panos Roussos and Kuan-Lin Huang
022 0
Joseph Castellano @jmcastell.bsky.social · 18/02/2025
Congrats, Nick!
000 0
Reposted by Joseph Castellano
Shannon Macauley @macauleylab.bsky.social · 18/02/2025
Our latest in PNAS! 🎉 ATP-sensitive potassium channels alter glycolytic flux to modulate cortical activity and sleep Take home message? KATP channels are metabolic sensors under circadian control that gate glycolytic flux, arousal, & sleep/wake transitions. www.pnas.org/doi/10.1073/...
pnas.org
ATP-sensitive potassium channels alter glycolytic flux to modulate cortical activity and sleep | PNAS
Metabolism plays a key role in the maintenance of sleep/wake states. Brain lactate fluctuations are a biomarker of sleep/wake transitions, where in...
67021 0
Joseph Castellano @jmcastell.bsky.social · 18/02/2025
Congrats to you and the whole team!! 👏🍾
110 0
Reposted by Joseph Castellano
BrunetLab @brunetlab.bsky.social · 18/12/2024
Thrilled to see this paper out!! 🧪 Spatial transcriptomics of brain aging and 'spatial aging clocks' identify cells that have pro-aging or pro-rejuvenating effects on their neighbors! Huge CONGRATS to Eric Sun and all authors! Fantastic collaboration with @jameszou.bsky.social! rdcu.be/d33uQ 🧵
rdcu.be
Spatial transcriptomic clocks reveal cell proximity effects in brain ageing
Nature - A spatially resolved single-cell transcriptomics map of the mouse brain at different ages reveals signatures of ageing, rejuvenation and disease, including ageing effects associated with T...
2230296 0
Joseph Castellano @jmcastell.bsky.social · 18/12/2024
Fantastic study - congrats!!!
110 0
Reposted by Joseph Castellano
Luke Sjulson @lukesjulson.bsky.social · 13/12/2024
Neuroscience students asked us to teach a PRACTICAL course on experimental methods, and it is now on YouTube! Please like and repost to help us get the word out! www.youtube.com/playlist?lis... Lecture 1: Signals and data acquisition Focusing on hardware, digital/analog I/O, synchronization 🧵
youtube.com
Neuroscience methods - YouTube
Nanocourse: Approaches to Study Neural Circuits This course was taught by Anita Autry, Tiago Gonçalves, and Luke Sjulson at Albert Einstein College of Medici...
19437215 0
Reposted by Joseph Castellano
Science News @scinews.bsky.social · 25/11/2024
Atlas of the plasma proteome in health and disease in 53,026 adults. #Cell #medBsky #SciBsky #scisky #proteome These results provide an open-access comprehensive proteome-phenome resource (proteome-phenome-atlas.com). Open Access www.cell.com/cell/fulltex...
0349 0
Joseph Castellano @jmcastell.bsky.social · 24/11/2024
Great pack - can you please add me?
120 0
Reposted by Joseph Castellano
BrunetLab @brunetlab.bsky.social · 23/11/2024
Updated Aging Starter Pack!! People and labs interested in aging 😀 Let me know if you'd like to be added! go.bsky.app/5UXXaDA
469441 0
Joseph Castellano @jmcastell.bsky.social · 24/11/2024
I'd love to be added - thanks for organizing the list!
020 0
Joseph Castellano @jmcastell.bsky.social · 24/11/2024
Thx - good to see you here!
010 0
Joseph Castellano @jmcastell.bsky.social · 24/11/2024
I'd love to join!
110 0
Joseph Castellano @jmcastell.bsky.social · 18/11/2024
Thanks - much appreciated!
000 0
Reposted by Joseph Castellano
Denise J. Cai, Ph.D. @denisejcai.bsky.social · 15/11/2024
Hello Bluesky! 🦋 I’m an Associate Professor of #Neuroscience at the Icahn School of Medicine at Mount Sinai. I study how memories are stably stored and flexibly updated across time and experience 🧠 I also develop open-source tech! Looking forward to connecting here! #Neuroskyence #WomenInSTEM
Blueksy shaped butterfly with appearance of neural connections throughout
624923 0
Reposted by Joseph Castellano
Shane Liddelow @liddelowsa.bsky.social · 14/11/2024
go.bsky.app/Lyzro3M !WELCOME! thought we might need a starter pack for all those coming over from the birdhouse - here's a GliaSky list. apologies for missing many of you - please do reply to get added and remember to repost so the newbies can find us!
9412999 0
Joseph Castellano @jmcastell.bsky.social · 15/11/2024
Great idea - would love to be added!
110 0
Joseph Castellano @jmcastell.bsky.social · 13/11/2024
Great idea - would love to be included!
000 0
Joseph Castellano @jmcastell.bsky.social · 02/11/2023
Our study is out! TIMP2, prev tied to blood-borne revitalization of aged brain, regulates hippocampal plasticity via the extracellular matrix. Great teamwork f/ 1st-author Catarina Ferreira + the whole lab, +collaborators Tim Ahfeldt, Merina Varghese, and Patrick Hof! www.nature.com/articles/s41...
nature.com
Neuronal TIMP2 regulates hippocampus-dependent plasticity and extracellular matrix complexity - Mole...
Molecular Psychiatry - Neuronal TIMP2 regulates hippocampus-dependent plasticity and extracellular matrix complexity
0121 0