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Neural Plasticity
Volume 2015, Article ID 627837, 7 pages
http://dx.doi.org/10.1155/2015/627837
Research Article

Repeated Three-Hour Maternal Separation Induces Depression-Like Behavior and Affects the Expression of Hippocampal Plasticity-Related Proteins in C57BL/6N Mice

1School of Nursing, Nanjing University of Chinese Medicine, Nanjing 210023, China
2Medical College, Nantong University, Nantong 226001, China
3School of Basic Medical Sciences, Nanjing University of Chinese Medicine, Nanjing 210023, China
4First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing 210023, China

Received 18 April 2015; Revised 12 August 2015; Accepted 19 August 2015

Academic Editor: Pablo Enriori

Copyright © 2015 Yaoyao Bian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Adverse early life experiences can negatively affect behaviors later in life. Maternal separation (MS) has been extensively investigated in animal models in the adult phase of MS. The study aimed to explore the mechanism by which MS negatively affects C57BL/6N mice, especially the effects caused by MS in the early phase. Early life adversity especially can alter plasticity functions. To determine whether adverse early life experiences induce changes in plasticity in the brain hippocampus, we established an MS paradigm. In this research, the mice were treated with mild (15 min, MS15) or prolonged (180 min, MS180) maternal separation from postnatal day 2 to postnatal day 21. The mice underwent a forced swimming test, a tail suspension test, and an open field test, respectively. Afterward, the mice were sacrificed on postnatal day 31 to determine the effects of MS on early life stages. Results implied that MS induces depression-like behavior and the effects may be mediated partly by interfering with the hippocampal GSK-3β-CREB signaling pathway and by reducing the levels of some plasticity-related proteins.