Individual Differences in Social Behavior and Cortical Vasopressin Receptor: Genetics, Epigenetics, and Evolution

Frontiers in Neuroscience
Steven M PhelpsAlejandro Berrio

Abstract

Social behavior is among the most complex and variable of traits. Despite its diversity, we know little about how genetic and developmental factors interact to shape natural variation in social behavior. This review surveys recent work on individual differences in the expression of the vasopressin 1a receptor (V1aR), a major regulator of social behavior, in the neocortex of the socially monogamous prairie vole. V1aR exhibits profound variation in the retrosplenial cortex (RSC), a region critical to spatial and contextual memory. RSC-V1aR abundance is associated with patterns of male space-use and sexual fidelity in the field: males with high RSC-V1aR show high spatial and sexual fidelity to partners, while low RSC-V1aR males are significantly more likely to mate outside the pair-bond. Individual differences in RSC-V1aR are predicted by a set of linked single nucleotide polymorphisms within the avpr1a locus. These alternative alleles have been actively maintained by selection, suggesting that the brain differences represent a balanced polymorphism. Lastly, the alleles occur within regulatory sequences, and result in differential sensitivity to environmental perturbation. Together the data provide insight into how genetic, epigen...Continue Reading

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Citations

Oct 31, 2020·Hormones and Behavior·Jenelys Ruiz-Ortiz, Jessica Tollkuhn
Nov 6, 2021·Human Nature : an Interdisciplinary Biosocial Perspective·Melvin Konner

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Methods Mentioned

BETA
immunoprecipitation
ChIP-seq
Hi-C

Software Mentioned

ENCODE

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