Prelimbic cortex glucocorticoid receptors regulate the stress-mediated inhibition of pain contagion in male mice.

Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology
Navdeep K LidharLoren J Martin

Abstract

Experiencing pain with a familiar individual can enhance one's own pain sensitivity, a process known as pain contagion. When experiencing pain with an unfamiliar individual, pain contagion is suppressed in males by activating the endocrine stress response. Here, we coupled a histological investigation with pharmacological and behavioral experiments to identify enhanced glucocorticoid receptor activity in the prelimbic subdivision of the medial prefrontal cortex as a candidate mechanism for suppressing pain contagion in stranger mice. Acute inhibition of glucocorticoid receptors in the prelimbic cortex was sufficient to elicit pain contagion in strangers, while their activation prevented pain contagion in cagemate dyads. Slice physiology recordings revealed enhanced excitatory transmission in stranger mice, an effect that was reversed by pre-treating mice with the corticosterone synthesis inhibitor metyrapone. Following removal from dyadic testing, stranger mice displayed enhanced affective-motivational pain behaviors when placed on an inescapable thermal stimulus, which were reversed by metyrapone. Together, our data suggest that the prelimbic cortex may play an integral role in modulating pain behavior within a social context ...Continue Reading

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Citations

Nov 11, 2021·Science Translational Medicine·Nicole Mercer LindsayGrégory Scherrer
Nov 24, 2021·Genes, Brain, and Behavior·Loren J MartinClaire Chan

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