Postnatal alcohol exposure and adolescent exercise have opposite effects on cerebellar microglia in rat.

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
Zachary H GurskyA Y Klintsova

Abstract

Developmental alcohol exposure results in altered neuroimmune function in both humans and rodents. Given the critical role for the principle neuroimmune cell, microglia, in maintaining synaptic form and function, microglial dysfunction in the cerebellum may be an important mechanism underlying the aberrant cerebellar connectivity observed in rodent models of fetal alcohol spectrum disorders. Using an established rodent model of alcohol exposure during human third-trimester fetal development, we examine the cerebellum of male and female Long Evans rats to determine the impact of early postnatal alcohol exposure on cerebellar microglia, and the potential therapeutic effects of an adolescent intervention consisting of voluntary exercise (running). All cerebelli were examined at postnatal day 42 (i.e., late adolescence), and microglia were labeled with Iba1, a microglia-specific protein. Early postnatal alcohol exposure caused an increase in microglial density throughout cerebellum and a reduction in cerebellar volume, and a reduction in the proportion of fully ramified (often called "resting state") microglia selective to lobules 1-4. In contrast, adolescent exercise decreased microglial density throughout cerebellum and increased...Continue Reading

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Citations

Jun 29, 2021·Frontiers in Molecular Biosciences·Iskra AraujoDanielle Gulick

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