Sign in

Mathias Guayasamin

@mathiasgua.bsky.social
347 followers 222 following 9 posts

PhD candidate in neurobiology and apprentice star-whisperer with the Murphy-Royal team 🚴🏽‍♂️ The work is mysterious and important

PostsRepliesMedia
Mathias Guayasamin @mathiasgua.bsky.social · 12h
Very cool timelapse of my first fos-trapped neuronal ensemble experiment under the 2P 🏄‍♂️
020
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 31/07/2026
After a busy week in Nagoya at the Neuroendocrinology meeting, both @mathiasgua.bsky.social & @ossamaghenissa.bsky.social made the lab proud, presenting at the Japanese Neuroscience society meeting (Neuro2026) in Kobe
0112
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 16/05/2026
Lots of great feedback on some of the lab work I shared today at CANGlia. Thanks to all the organisers for putting on such a fantastic meeting!
0142
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 15/05/2026
@mathiasgua.bsky.social doing the lab proud at @canglia.bsky.social meeting in the @theneuro.bsky.social
0144
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 02/05/2026
Incredibly proud of both @mathiasgua.bsky.social and @ossamaghenissa.bsky.social who were both offered doctoral fellowships from @fondsrechercheqc.bsky.social !! 🥳🥳 It’s been a terrific year for the lads 💪(photo from past summer in France)
0111
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 24/03/2026
Incredibly proud of this paper led by @ossamaghenissa.bsky.social and @mathiasgua.bsky.social titled Basolateral 'Amygdala Astrocytes Encode Anxiety States'. www.cell.com/neuron/fullt... 🧵 below
cell.com
Basolateral amygdala astrocytes encode anxiety states
Ghenissa et al. provide evidence that basolateral amygdala astrocytes reliably encode anxiety states. Using simultaneous in vivo calcium recordings across an array of behavioral tasks, combined with g...
138728
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 22/01/2026
Nice surprise today in @thetransmitter.bsky.social daily email linking our preprint! Thank you! 😍 mailchi.mp/thetransmitt...
Screenshot of email that says “new preprint finds that in the basolateral amygdala, "astrocytic activity provides a stable and scalable representation of threat-induced anxiety across an array of behavioral tasks."
0173
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 15/01/2026
🚨Registration for the N American stress meeting is now open!!🚨 Really excited to be part of it and host the event in the @crchum.bsky.social in Montréal this June! www.stress2026.com/registration
0137
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 08/01/2026
Delighted to share our first preprint of the year! A project that we're all really proud of in the lab led by @ossamaghenissa.bsky.social with @mathiasgua.bsky.social in which we set out to test the role of basolateral amygdala astrocytes in anxiety behaviour. www.biorxiv.org/content/10.6...
biorxiv.org
Astrocytic Encoding of Threat in the Basolateral Amygdala
The basolateral amygdala (BLA) has long been implicated in threat detection and the generation of anxiety states. While previous experiments have demonstrated the important role of BLA principal neuro...
45219
Reposted by Mathias Guayasamin
Tomás Ryan @tjryan.bsky.social · 02/01/2026
Starting 2026 with a thread a very recent manuscripts at Ryan Lab @tcddublin.bsky.social @tbsi-tcd.bsky.social "Extinction and subsequent updating of innate fear responses to a visual looming stimulus rely on hippocampus-dependent mechanisms" journals.plos.org/plosbiology/... @PLOSBiology
journals.plos.org
Extinction and subsequent updating of innate fear responses to a visual looming stimulus rely on hippocampus-dependent mechanisms
How does the brain balance innate responses with adaptive learning when reacting to threats? This study shows that repeated exposure to looming stimuli reduces innate defensive responses via hippocamp...
35820
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 10/12/2025
Fantastic presentation from @mathiasgua.bsky.social at @umontreal.ca Neuro department research day. Showing all his cool new data!
Mathias giving his presentation in an amphitheatre
061
Reposted by Mathias Guayasamin
Dylan Burnette @mag2art.bsky.social · 11/10/2025
Fish keratocytes isolated from a fish scale crawling around. Technique: DIC microscopy. #CellBiology. Another #NikonSmallWorldReject
2539
Reposted by Mathias Guayasamin
allen institute @alleninstitute.org · 08/10/2025
"Reproducibility isn’t glamorous, but it’s essential." @annechurchland.bsky.social speaks candidly in @thetransmitter.bsky.social about the obstacles to reproducibility and shares practical advice for other neuroscience labs. 🧠📈 www.thetransmitter.org/reproducibil...
thetransmitter.org
Reproducibility is a team sport
Building reproducible systems across labs is possible, even in large-scale neuroscience—with rigor and collaboration.
14811
Mathias Guayasamin @mathiasgua.bsky.social · 07/07/2025
Thrilled to have received my first ever poster prize last week at EBBS2025 in Bordeaux 🏄‍♂️! Cherry on top was that I actually did my master’s in Bordeaux a few years ago and saw many friendly faces during that (VERY) hot week.
030
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 01/07/2025
Part 2 of France trip done. Fantastic @ebbsociety.bsky.social meeting with PhD students from the lab! Topping it off with a presentation prize for @mathiasgua.bsky.social !! 🥳
4 scientists posing on a boat
0161
Mathias Guayasamin @mathiasgua.bsky.social · 06/06/2025
#fluorescencefriday picture I took a few months ago with our 2P of pyramidal neurons in the lateral amygdala expressing a lactate sensor 👽 title: Paths of fear
0232
Reposted by Mathias Guayasamin
George Currie @georgealfredcurrie.bsky.social · 19/05/2025
Does publishing serve science or is science serving publishing? Damian Pattinson and I (@elife.bsky.social) argue scientific publishing has evolved into a system that, rather than facilitate scholarly communication, distorts and dictates it. onlinelibrary.wiley.com/doi/10.1002/... #OpenScience
Screenshot of article summary of: Toward Science-Led Publishing
by Damian Pattinson, George Currie

published as an opinion piece, in Learned Publishing

Summary

The current dynamic of scholarly publishing prioritises the wants of the publishing industry over the needs of the research community.

This article explores this theme through the lens of ‘publisher-led science’ as a description of our current status quo, and through ‘science-led publishing’ as an improved future state.

We argue that financial motivations central to most publishing distort how research is presented, how it is assessed and even what research is undertaken, leading to a system that hinders, rather than facilitates, scientific progress.

We propose three elements of a science-led publishing approach that would accelerate research communication, incentivise collaboration between authors, editors and reviewers, and create a more transparent and equitable research landscape.

We believe that research funding and research assessment are two of the primary levers for wider change in research and research culture and consider the future purpose of scholarly publishing in a world where these proposals have been widely adopted.
47039
Reposted by Mathias Guayasamin
Papouin Lab @ WashU @papouinlab.bsky.social · 16/05/2025
Thought this would be a nice way to enter the bsky community👇Delighted for Katie (now in Chris Dulla's lab at Tufts). Thank you to our collaborators, to the reviewers and to Cagla Eroglu for the highlight! www.science.org/doi/10.1126/...
science.org
Norepinephrine signals through astrocytes to modulate synapses
Locus ceruleus (LC)–derived norepinephrine (NE) drives network and behavioral adaptations to environmental saliencies by reconfiguring circuit functional connectivity, but the underlying synapse-level...
45821
Reposted by Mathias Guayasamin
Paul Byrne @theplanetaryguy.com · 29/04/2025
This is a new image from #JWST. The bright points with spikes are stars in the Milky Way. Everything else is a galaxy. Everything. Else. Is. A. Galaxy.
607188024034
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 29/04/2025
Great seminar from @lewisholt.bsky.social today at the @crchum.bsky.social ! Part of the ‘exit seminar’ as he closes in on the finish line of his PhD 🥲
0102
Reposted by Mathias Guayasamin
Ciaran Murphy-Royal @murphyroyallab.org · 09/04/2025
Happy to share the commentary "Astrocytic CREB: The Hidden Driver of Stress Susceptibility" @mathiasgua.bsky.social and I put together for Biological Psychiatry www.sciencedirect.com/science/arti...
sciencedirect.com
Astrocytic CREB: The Hidden Driver of Stress Susceptibility
1208
Reposted by Mathias Guayasamin
mark cembrowski @markcembrowski.bsky.social · 24/03/2025
Program for the "Neural Circuits and Behaviour" CAN 2025 satellite is now available! We have a great day planned, and are especially looking for trainees to join the event - we'll select four trainees for talks, with a prize for best trainee talk. Details: www.eventbrite.ca/e/neural-cir...
1208
Mathias Guayasamin @mathiasgua.bsky.social · 14/02/2025
#FluorescenceFriday Title: Solar Flare Lateral amygdala astrocyte going about its daily routine
1162
Mathias Guayasamin @mathiasgua.bsky.social · 10/12/2024
SUPER happy that the newest version of our preprint is finally sailing the seas on biorxiv 🤩 Quite a journey where we explored the impact of early-life-stress on fear memory specificity, neuronal circuits in the lateral amygdala and the astrocytes that regulate them 🌟
081
Reposted by Mathias Guayasamin
Mark Peifer (He, him) @peiferlabunc.bsky.social · 17/11/2024
iBiology is a REMARKABLE and under-utilized resource for learning from some of the pioneers of microscopy--these videos are suitable for undergraduate classes or experts 🧪
1018142
Mathias Guayasamin @mathiasgua.bsky.social · 15/11/2024
#FluorescenceFriday 2-photon calcium imaging recording from a magestic astrocyte. Title: twinkle twinkle little star
1403