Cited by 92Probiotics and Fermented FoodsGastrointestinal motility and disordersStress Responses and Cortisol

BDNF expression in the hippocampus of maternally separated rats: does Bifidobacterium breve 6330 alter BDNF levels?

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O'Sullivan, E., Barrett, E., Grenham, S., Fitzgerald, P., Stanton, C., Ross, R., Quigley, E., Cryan, J. +1 more·2011·Beneficial Microbes

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.

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Authors
O'Sullivan, E., Barrett, E., Grenham, S., Fitzgerald, P., Stanton, C., Ross, R., Quigley, E., Cryan, J., & Dinan, T.
Affiliations
  • University College Cork, Alimentary Pharmabiotic Centre, College Road, Cork, Ireland
  • Teagasc - The Irish Agriculture and Food Development Authority (IE)
  • University College Cork (IE)
Venue
Beneficial Microbes
Published
2011-09-01
Volume
2
Issue
3
Pages
199-207
ISSN
  • 1876-2883 (ISSN-L)
  • 1876-2891
OpenAlex
W2146214392
Cited by
92
References
73
Citations by year
2026: 1 · 2025: 7 · 2024: 3 · 2023: 8 · 2022: 11 · 2021: 11 · 2020: 12 · 2019: 7 · 2018: 7 · 2017: 2 · 2016: 6 · 2015: 7 · 2014: 5 · 2013: 3 · 2012: 2
FWCI
4.67
Type
journal article
Language
en
Open access
Locations
  • Beneficial Microbes (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
brain-derived neurotrophic factor, maternal separation, early life stress, probiotics, hippocampus, gut-brain axis, irritable bowel syndrome, stress-related psychiatric disorders
MeSH terms
Animals, Animals, Newborn, Bifidobacterium, Female, Hippocampus, Humans, Male, Maternal Deprivation, Up-Regulation, Gene Expression, Rats, Sprague-Dawley, Alternative Splicing, Brain-Derived Neurotrophic Factor, Probiotics, Models, Animal, Rats

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