BDNF expression in the hippocampus of maternally separated rats: Does Bifidobacterium breve 6330 alter BDNF levels? Academic Article uri icon

Overview

MeSH Major

  • Bifidobacterium
  • Brain-Derived Neurotrophic Factor
  • Hippocampus
  • Maternal Deprivation
  • Probiotics

abstract

  • Brain-derived neurotrophic factor (BDNF) is of interest because of its putative role in stress and psychiatric disorders. Maternal separation is used as an animal model of early-life stress and of irritable bowel syndrome (IBS). Animals exposed to the paradigm show altered gut function together with heightened levels of arousal and corticosterone. Some probiotic organisms have been shown to be of benefit in IBS and influence the brain-gut axis. Our objective was to investigate the effects of maternal separation on BDNF under basal conditions and in response to the probiotic Bifidobacterium breve 6330. The study implemented the maternal separation model which we have previously described. Polymerase chain reaction and in situ hybridisation were performed to measure the effect of maternal separation on both BDNF total variants and BDNF splice variant (exon) IV in the hippocampus. Maternally separated and non-separated rats were treated with B. breve 6330, to investigate the effect of this probiotic on BDNF total variant and BDNF exon IV expression. Maternal separation increased BDNF total variants (P<0.01), whilst having no effect on BDNF exon IV. B. breve 6330 increased BDNF total variants (P<0.01), and decreased BDNF splice variant IV, in non-separated rats (P<0.01). B. breve 6330 did not alter BDNF levels in the maternally separated rats. Maternal separation caused a marked increase in BDNF in the hippocampus. While B. breve 6330 influenced BDNF in normal animals, it had no significant effect on BDNF in those which were maternally separated. We have demonstrated that an orally administered probiotic can influence hippocampal BDNF.

publication date

  • September 2011

Research

keywords

  • Academic Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.3920/BM2011.0015

PubMed ID

  • 21986359

Additional Document Info

start page

  • 199

end page

  • 207

volume

  • 2

number

  • 3