Michael Totty

@mictott.bsky.social

Postdoctoral neuroscientist at JHU working at the intersection of neural circuits, bioinformatics, and psychiatric disorders. https://mictott.github.io

🧠🧬 What are the effects of intravenous fentanyl self-administration on the habenula and amygdala transcriptomes? In our new Addiction Biology paper, we addressed this question using a chronic long-access model in rats! Here are some highlights 🧵👇 Paper 👉 dx.doi.org/10.1111/adb....

Transcriptional Response to Chronic Long‐Access Fentanyl Self‐Administration in Rat Habenula and Amygdala

Chronic intravenous long-access fentanyl self-administration in rats produced transcriptional remodeling in the habenula and amygdala. Bulk RNA-sequencing identified 453 habenula and 3,041 amygdala d...

dx.doi.org

Very excited about this new preprint from @odrake.bsky.social, an incredibly talented MD/PhD student in the lab. 🧵 below, but the TL;DR: we found a rare striatal neuron subtype with unique transcriptional, spatial, and circuit properties that gates opioid reward.

Olivia Drake@odrake.bsky.social · 6d ago

Our new preprint from @daylab.bsky.social characterizes Chst9-MSNs, a specialized NAc population with high Oprm1 expression and opioid sensitivity that is required for fentanyl reward learning. Excited to share this work! 🧠🧬 www.biorxiv.org/content/10.6...

Even with all the new imaging tech we have, nothing beats the old school neuroanatomy drawings. I particularly love the level of detail shown here of the various nuclei and cell types found in the human amygdala. Studies of the Vertebrate Telencephalon II. Crosby and Humphrey, 1941.

Bild

19 on my K99 resubmission! Massive thanks to my mentors and letter writers for all their support. Hard to tell if it will actually translate to funding in this climate, but I'll take the win regardless!

Bild

Excited to share our new paper: We uncover a locus coeruleus→amygdala circuit linking β-adrenergic signaling to transcription regulation in defined amygdala cells during memory reconsolidation—+ stress or elevated noradrenergic signaling at recall can strengthen memory. www.cell.com/neuron/abstr...

A neuromodulatory circuit-to-molecular pathway for reformatting aversive memories during recall

Tan et al. identify a neuromodulatory circuit-to-molecular pathway in rats that updates aversive memories when they are recalled. Noradrenaline from the locus coeruleus triggers synapse-to-nuclear tra...

cell.com