title: Exercise-induced regulation of brain-derived neurotrophic factor (BDNF) transcripts in the rat hippocampus.
abstract: Previous results from our laboratory indicate that two nights of voluntary wheel running upregulates brain-derived neurotrophic factor (BDNF) mRNA expression in the hippocampus. In order to investigate the time-course of the BDNF response and to examine how physical activity preferentially activates particular transcriptional pathways, the effects of 6 and 12 h of voluntary wheel running on BDNF and exons I-IV mRNA expression were investigated in rats. Hippocampal full-length BDNF mRNA expression was rapidly influenced by physical activity, showing significant increases in expression levels as soon as 6 h of voluntary wheel running. Moreover, there was a strong positive correlation between distance run and BDNF mRNA expression. Exon I mRNA expression was significantly upregulated after 6 h of running and was maintained or enhanced by 12 h of voluntary running. Exon II had a slower time-course and was significantly upregulated after 12 h, selectively in the CA1 hippocampal region. Exon III and Exon IV showed no significant increase in expression level after 6 or 12 h of running in the paradigm studied. It is significant that the rapid neurotrophin response is demonstrated for a physiologically relevant stimulus, as opposed to the extreme conditions of seizure paradigms. Furthermore, exercise-induced upregulation of BDNF may help increase the brain's resistance to damage and neurodegeneration that occurs with aging.
authors.affiliation: Institute for Brain Aging and Dementia, University of California, Irvine, Irvine, CA 92697-4540, USA.
authors.forename: H S
authors.initials: HS
authors.lastname: Oliff
authors.forename: N C
authors.initials: NC
authors.lastname: Berchtold
authors.forename: P
authors.initials: P
authors.lastname: Isackson
authors.forename: C W
authors.initials: CW
authors.lastname: Cotman
mesh_terms: D000818:Animals; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics* / Q000378:metabolism*; D005786:Gene Expression Regulation / Q000502:physiology; D006624:Hippocampus / Q000737:chemistry / Q000378:metabolism*; D008297:Male; D010805:Physical Conditioning, Animal / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology; D051381:Rats; D011916:Rats, Inbred F344; D013997:Time Factors; D014158:Transcription, Genetic / Q000502:physiology*; D015854:Up-Regulation / Q000235:genetics
chemical_list: D019208:Brain-Derived Neurotrophic Factor