Deprivation of Maternal Care Has Long-lasting Consequences for the Hypothalamic-pituitary-adrenal Axis of Zebra Finches

Overview

Journal Proc Biol Sci

Specialty Biology

Date 2011 Jul 22

PMID 21775332

Citations 30

Authors

Sunayana B Banerjee

Adam S Arterbery

Daniel J Fergus

Elizabeth Adkins-Regan

Affiliations

Soon will be listed here.

Abstract

Early-life stress caused by the deprivation of maternal care has been shown to have long-lasting effects on the hypothalamic-pituitary-adrenal (HPA) axis in offspring of uniparental mammalian species. We asked if deprivation of maternal care in biparental species alters stress responsiveness of offspring, using a biparental avian species--the zebra finch, Taeniopygia guttata. In our experiment, one group of birds was raised by both male and female parents (control), and another was raised by males alone (maternally deprived). During adulthood, offspring of both groups were subjected to two stressors (restraint and isolation), and corticosterone concentrations were measured. Additionally, we measured baseline levels of the two corticosteroid receptors--glucocorticoid receptor (GR) and mineralocorticoid receptor (MR)--in the hippocampus, hypothalamus and cerebellum. Our results suggest that maternally deprived offspring are hyper-responsive to isolation in comparison with controls. Furthermore, mRNA levels of both GR and MR receptors are altered in maternally deprived offspring in comparison with controls. Thus, absence of maternal care has lasting consequences for HPA function in a biparental species where paternal care is available.

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