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Neuropeptides. 2015 Aug;52:103-11. doi: 10.1016/j.npep.2015.05.002. Epub 2015 May 28.

Early life social stress induced changes in depression and anxiety associated neural pathways which are correlated with impaired maternal care.

Author information

1
Manchester Metropolitan University School of Healthcare Science, All Saints Building, Manchester M15 6BH, UK.
2
Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, United States.
3
Tufts University Cummings School of Veterinary Medicine, 200 Westboro Road, North Grafton, MA 01536, United States. Electronic address: bcnephew@aol.com.

Abstract

Exposures to various types of early life stress can be robust predictors of the development of psychiatric disorders, including depression and anxiety. The objective of the current study was to investigate the roles of the translationally relevant targets of central vasopressin, oxytocin, ghrelin, orexin, glucocorticoid, and the brain-derived neurotrophic factor (BDNF) pathway in an early chronic social stress (ECSS) based rodent model of postpartum depression and anxiety. The present study reports novel changes in gene expression and extracellular signal related kinase (ERK) protein levels in the brains of ECSS exposed rat dams that display previously reported depressed maternal care and increased maternal anxiety. Decreases in oxytocin, orexin, and ERK proteins, increases in ghrelin receptor, glucocorticoid and mineralocorticoid receptor mRNA levels, and bidirectional changes in vasopressin underscore related work on the adverse long-term effects of early life stress on neural activity and plasticity, maternal behavior, responses to stress, and depression and anxiety-related behavior. The differences in gene and protein expression and robust correlations between expression and maternal care and anxiety support increased focus on these targets in animal and clinical studies of the adverse effects of early life stress, especially those focusing on depression and anxiety in mothers and the transgenerational effects of these disorders on offspring.

KEYWORDS:

Anxiety; Depression; Early life stress; Ghrelin; Mineralocorticoid receptor; Neuroplasticity; Orexin; Oxytocin; Postpartum depression; Vasopressin

PMID:
26049556
PMCID:
PMC4537387
DOI:
10.1016/j.npep.2015.05.002
[Indexed for MEDLINE]
Free PMC Article

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