Water-only mice developed pain hypersensitivity from olfactory cues alone.
1. Stories of Women in Neuroscience centers on Dr. Monique Smith and her research on the social transfer of pain and analgesia.
2. Nancy Padilla hosts the interview, and Monique Smith is an assistant professor of neurobiology and neuroscience at the University of California, San Diego.
3. The episode asks how a first-generation student moved from psychology classes to an independent neuroscience program on pain, alcohol, and empathy-like behavior.
4. Smith says organic chemistry pushed her out of pre-med and into psychology, where a biological psychology class on sensation and perception showed her that scientists still had many unanswered questions.
5. At Cal State San Marcos, she found only one rat lab studying addiction, and she persuaded the lab to let her join its work.
6. During her undergraduate and master's training, she studied PCP and ketamine as dissociative anesthetics and their effects on rat behavior across development.
7. After a summer research program, she moved to UCLA and worked with Chris Evans and Amina Pradhan on a nitroglycerin-induced mouse model of migraine.
8. She says that reverse translational model was controversial because some people argued that mice could not experience headache.
9. In graduate school, she chose a pain lab and wrote an F31 on the Edinger-Westphal nucleus, a midbrain region above the VTA and below the PAG.
10. She then found that C57 black six mice withdrawing from alcohol showed pain hypersensitivity, and that water-drinking cage mates developed the same sensitivity through olfactory cues and dirty bedding.
11. Smith says that result led her to call the phenomenon the social transfer of pain.
12. She describes the experiment as a lot of mice in separate rooms, including one point with 48 mice in one room, 24 in another, and eight in another.
13. In postdoctoral work with Rob Malenka at Stanford, she rebuilt the behavioral model into a shorter setup with four mice, one pain mouse, and one bystander.
14. She says the new design made it possible to test whether the anterior cingulate cortex was required for acquisition rather than expression of the behavior.
15. Her lab also found a social transfer of analgesia after many failed attempts to transfer sucrose reward, cocaine sensitization, and morphine.
16. Smith says the same anterior cingulate to nucleus accumbens pathway supported both social transfer of pain and social transfer of analgesia, while a separate anterior cingulate to basolateral amygdala pathway supported observational fear.
17. She and Nancy Padilla frame the work as a storytelling lesson, with Rob Malenka suggesting that the paper should end with the social transfer of analgesia rather than the older fear comparison.
18. The interview is conversational and reflective, with long stretches where Smith explains protocol details, control groups, and the logic behind each experiment.
19. Listeners interested in pain circuitry, alcohol research, empathy, and mentorship will likely follow this episode.
20. Listeners wanting a fast celebrity-style science story may skip the methodological detail.
