Stephen V Mahler
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svmahler.bsky.social
Stephen V Mahler
@svmahler.bsky.social
Behavioral Neuroscientist, Prof, ICAN co-Director, Ivan Pavlov fan.
Interested in rats, drugs, motivation circuits, orexin, VP, DREADDs, psychedelics, neurodevelopment, etc
https://faculty.sites.uci.edu/mahlerlab/

http://www.youtube.com/@stephenvmahler56
Reposted by Stephen V Mahler
I am a little tired of being yelled at for this but apparently not tired about: heroin addiction is not RFK’s problem. He’s a sociopath. Most addicts aren’t. Honestly, walk into an NA meeting, grab the first person with a few years to be head of HHS and they’d probably do a better job than Bobby.
This is what happens when you put a privileged, 14 year heroin addict in charge of health. Duh
November 27, 2025 at 12:15 AM
Reposted by Stephen V Mahler
Want to combat the Thanksgiving food coma? Grab a cozy spot on the couch and read our new paper in Psychopharmacology, part of an upcoming special issue honoring the late Dr. Klaus Miczek's seminal contributions. Congrats co-first authors Aditi Buch & Ava Shipman! link.springer.com/article/10.1...
Single prolonged stress in mice: interactions between alcohol drinking, negative affect, and fear learning - Psychopharmacology
Rationale & objective Exposure to traumatic stressors can have detrimental effects on one’s well-being. Alcohol is often used as a coping mechanism to alleviate stress, leading to the development of a...
link.springer.com
November 26, 2025 at 7:08 PM
Reposted by Stephen V Mahler
New computational paper from the lab! Thanks to the reviewers for helping us improve this paper from the preprint version and Nucleic Acids Research for a smooth publication process.
Excited to share that our article on accurate sample deconvolution of pooled snRNA-seq data using sex-dependent gene expression patterns is live on NAR Genomics and Bioinformatics! 🎉

Check it out here: doi.org/10.1093/narg...

#NARGenomicsandBioinformatics #snRNAseq #Genomics #Bioinformatics
Validate User
doi.org
November 26, 2025 at 6:15 PM
Reposted by Stephen V Mahler
New lab paper drop, this one has been a long time coming! Driven by Rob Aukema (now a postdoc with Kerry Ressler) this paper in Science Advances answered the lingering question of what role the amygdala plays in stress-induced neuroendocrine responses.

www.science.org/doi/10.1126/...
A network of basolateral amygdala projection neurons contributes to stress-induced activation of the hypothalamic-pituitary-adrenal axis
A network of basolateral amygdala neurons, but not singular projections, contributes to the neuroendocrine response to stress.
www.science.org
November 25, 2025 at 10:13 PM
Reposted by Stephen V Mahler
A great intro to academic conferencing.
Not sure how I missed this one.

scienceforeveryone.science/getting-the-...
Getting the most of out a scientific conference
A slightly unconventional guide to your first time
scienceforeveryone.science
November 26, 2025 at 4:47 AM
Reposted by Stephen V Mahler
#eNeuro | Layer-Specific Glutamatergic Inputs and Parvalbumin Interneurons Modulate Early Life Stress-Induced Alterations in Prefrontal Glutamate Release during Fear Conditioning in Pre-adolescent Rats
vist.ly/4fmx5
November 22, 2025 at 11:29 PM
Reposted by Stephen V Mahler
Finally dropped! fantastic collaboration with @ladenardo.bsky.social, whole-brain analyses of our novel CRH/GABA BLA-NAc projection shows impact of earlylife stress that are sex dependent & reflect reward behaviors www.jneurosci.org/content/earl... @thebalelab.bsky.social @kundakoviclab.bsky.social
November 21, 2025 at 5:49 PM
Congratulations to the recipients of the 2025 Science Education and Outreach Awards

These researchers are advancing neuroscience through groundbreaking discoveries, mentorship, & scientific excellence.

Listen to their remarks: vist.ly/4f8cn

#SfN25 #neurosky #neuroskyence
November 20, 2025 at 3:30 AM
Reposted by Stephen V Mahler
So stoked to have our image on the cover of this week's issue of Journal of Neuroscience!! @sfnjournals.bsky.social #JNeurosci #SfN25. Check out the final version of the paper here www.jneurosci.org/content/45/4...
Superior Colliculus Projections Drive Dopamine Neuron Activity and Movement But Not Value
To navigate dynamic environments, animals must rapidly integrate sensory information and respond appropriately to gather rewards and avoid threats. It is well established that dopamine (DA) neurons in...
www.jneurosci.org
November 19, 2025 at 6:15 PM
Busy posters this morning at @SfNtweets from Maricela Martinez, Selen Dirik, Erica Ramirez, and Grayson Butcher.!
Come see us at AA9, AA10, AA5, & AA6 before noon! #THC #opioid #VP #social
November 16, 2025 at 6:04 PM
Reposted by Stephen V Mahler
This paper was a pleasure to read as review editor! Congrats to the authors! For others, eNeuro has the best review process in town with a synthesized review by the editor in consultation with reviewers!
#eNeuro | The Ventral Pallidum Innervates a Distinct Subset of Midbrain Dopamine Neurons
vist.ly/4dgyn
The Ventral Pallidum Innervates a Distinct Subset of Midbrain Dopamine Neurons
Aberrant dopamine transmission is a hallmark of several psychiatric disorders. Dopamine neurons in the ventral tegmental area (VTA) display distinct activity states that are regulated by discrete afferent inputs. For example, burst firing requires excitatory input from the mesopontine tegmentum, while dopamine neuron population activity, defined as the number of spontaneously active dopamine neurons, is thought to be dependent on inhibitory drive from the ventral pallidum (VP). Rodent models used to study psychiatric disorders, such as psychosis, consistently exhibit elevated dopamine neuron population activity, due to decreased tonic inhibition from the VP. However, it remains unclear whether the VP can modulate all dopamine neurons or if only a specific subset of VTA dopamine neurons receive innervation from the VP to be recruited as required. This knowledge is critical for understanding dopamine regulation in normal and pathological conditions. Here, we used in vivo electrophysiology in male and female rats to record VTA dopamine neurons inhibited by electrical stimulation of the VP. Specifically, VP stimulation inhibited ∼22% of spontaneously active dopamine neurons; however, activation of the ventral hippocampus, a modulator of VTA population activity, increased the proportion to ∼48%. This increase suggests that VP selectively modulates a subset of dopamine neurons that can be recruited by afferent activation. Anterograde monosynaptic tracing revealed that approximately half of the VTA dopamine neurons receive input from the VP. Taken together, we demonstrate that a subset of VTA dopamine neurons receives monosynaptic input from the VP, providing valuable information regarding the regulation of VTA neuron activity.
doi.org
November 8, 2025 at 7:37 PM
Reposted by Stephen V Mahler
Our paper using endoscopic in vivo calcium imaging to uncover how neuronal population dynamics in the prelimbic cortex track attention and task engagement during the rodent continuous performance test (rCPT) is now online

www.nature.com/articles/s41...
Patterns of neural activity in prelimbic cortex neurons correlate with attentional behavior in the rodent continuous performance test - Translational Psychiatry
Translational Psychiatry - Patterns of neural activity in prelimbic cortex neurons correlate with attentional behavior in the rodent continuous performance test
www.nature.com
November 7, 2025 at 1:25 PM
Reposted by Stephen V Mahler
Our Behavioural Brain Research special issue on Ultrasonic Communication in Rodents is growing, rapidly – and actually a lot faster than I manage to post about it. Nine new manuscripts got accepted since my last post. Quite impressive work. Check it out:
www.sciencedirect.com/special-issu...
November 6, 2025 at 12:53 PM
Reposted by Stephen V Mahler
the senate appropriations bill explicitly limits MYF while the congressional budget doesn't. Making sure the language in the senate appropriations bill ends up in the final budget seems like an clear goal tp push our representatives on
November 5, 2025 at 9:29 PM
Reposted by Stephen V Mahler
Excited to share new research from my lab in final published form! By deleting hypocretin (orexin) receptors from CRF neurons, we uncovered neuropeptide mechanisms linking alcohol drinking and negative emotional hyperarousal through BNST neuronal excitability.

www.sciencedirect.com/science/arti...
November 3, 2025 at 5:19 PM
Reposted by Stephen V Mahler
New ICAL paper in J. Neurosci!
Microglia support endocannabinoid-dependent LTP and episodic memory.

Microglia depletion disrupted LTP and memory in mice—effects reversed by enhancing 2-AG signaling.

📄 Chavez et al., 2025
🔗 www.jneurosci.org/content/45/2...
November 3, 2025 at 3:04 PM
Mahler lab wins (this year, co-won w @eitans.bsky.social lab) the @ucirvine.bsky.social CNLM costume contest! #1 for the 3rd time in 4 years!
Great job, guys!!
October 31, 2025 at 6:45 PM
Reposted by Stephen V Mahler
5/7 That $200 DOES NOT cover the dozens of hours that reviewers, mainly external scientists, spend on evaluations BEFORE the meetings. This is one of the greatest bargains for American taxpayers, as pharmaceutical companies can pay each consultant THOUSANDS of dollars for their expertise.
October 30, 2025 at 11:02 PM
Reposted by Stephen V Mahler
First neurons didn’t appear overnight. We trace their roots to ancient secretory cells - showing how lifestyle & behavior shaped the evolution of first synapses.🧠🌊 #Evolution #Neuroscience

Our latest in @natrevneuro.nature.com
Link: rdcu.be/eMX3E

@jeffcolgren.bsky.social @msarscentre.bsky.social
The evolutionary origins of synaptic proteins and their changing roles in different organisms across evolution
Nature Reviews Neuroscience - Recent studies have shed further light on the evolutionary origins of chemical synapses, In this Review, Colgren and Burkhardt explore how ancient proteins were...
rdcu.be
October 27, 2025 at 6:48 PM
Reposted by Stephen V Mahler
Talk about an in-flight meal.

For the first time, researchers have captured rats hunting bats by grabbing them from the sky. Learn more: https://scim.ag/3Jqldmn
October 27, 2025 at 10:31 PM
Reposted by Stephen V Mahler
Enjoyed discussing "Why Science & Philosophy Need Each Other" w Megan Peters @meganakpeters.bsky.social

We discuss the importance of engagement between science & philosophy, our experience w this & simplified conceptions of science & philosophy 🧠📕
Thanks Tev Naidu! #philsky #philsci #sciencesky
Why Science and Philosophy Need Each Other | Lauren Ross & Megan Peters
YouTube video by Mind-Body Solution
www.youtube.com
October 25, 2025 at 3:52 PM
Reposted by Stephen V Mahler
WOW! Our survey of scientists who stopped using Twitter and started using Bluesky is now the #1 most-shared on social media article in the history of the journal Integrative and Comparative Biology! Thanks for reading it, everyone! @sicbjournals.bsky.social

doi.org/10.1093/icb/... 🧪
Scientists no Longer Find Twitter Professionally Useful, and have Switched to Bluesky
Synopsis. Social media has become widely used by the scientific community for a variety of professional uses, including networking and public outreach. For
doi.org
October 15, 2025 at 7:29 PM
Reposted by Stephen V Mahler
Excited to share recent collaborative work led by Hayley Thorpe published in Molecular Psychiatry: Genome-wide association studies of lifetime and frequency of cannabis use in 131,895 individuals www.nature.com/articles/s41...
Genome-wide association studies of lifetime and frequency of cannabis use in 131,895 individuals - Molecular Psychiatry
Molecular Psychiatry - Genome-wide association studies of lifetime and frequency of cannabis use in 131,895 individuals
www.nature.com
October 13, 2025 at 12:41 PM