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2016 ; 5
(ä): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Exercise promotes the expression of brain derived neurotrophic factor (BDNF)
through the action of the ketone body ?-hydroxybutyrate
#MMPMID27253067
Sleiman SF
; Henry J
; Al-Haddad R
; El Hayek L
; Abou Haidar E
; Stringer T
; Ulja D
; Karuppagounder SS
; Holson EB
; Ratan RR
; Ninan I
; Chao MV
Elife
2016[Jun]; 5
(ä): ä PMID27253067
show ga
Exercise induces beneficial responses in the brain, which is accompanied by an
increase in BDNF, a trophic factor associated with cognitive improvement and the
alleviation of depression and anxiety. However, the exact mechanisms whereby
physical exercise produces an induction in brain Bdnf gene expression are not
well understood. While pharmacological doses of HDAC inhibitors exert positive
effects on Bdnf gene transcription, the inhibitors represent small molecules that
do not occur in vivo. Here, we report that an endogenous molecule released after
exercise is capable of inducing key promoters of the Mus musculus Bdnf gene. The
metabolite ?-hydroxybutyrate, which increases after prolonged exercise, induces
the activities of Bdnf promoters, particularly promoter I, which is
activity-dependent. We have discovered that the action of ?-hydroxybutyrate is
specifically upon HDAC2 and HDAC3, which act upon selective Bdnf promoters.
Moreover, the effects upon hippocampal Bdnf expression were observed after direct
ventricular application of ?-hydroxybutyrate. Electrophysiological measurements
indicate that ?-hydroxybutyrate causes an increase in neurotransmitter release,
which is dependent upon the TrkB receptor. These results reveal an endogenous
mechanism to explain how physical exercise leads to the induction of BDNF.