Abstract：
:The transition from multipotent neural stem cells (NSCs) to terminally differentiated neurons is a multistep process, and the transition is finely regulated by transcription factors with basic helix-loop-helix (bHLH) motifs. Melatonin is an endogenous neurohormone with profound neurotrophic and neuroprotective effects both during the embryonic developmental stage and adulthood. The effects of melatonin on the differentiation of NSCs have been reported, and these effects may be responsible for its neuroprotective properties. However, the mechanisms underlying the effects of melatonin are not well understood. It is unclear whether melatonin affects the expression of bHLH factors at the onset of neuronal differentiation, and the molecular mechanisms involved still need to be further explored. Using mouse NSCs, we identified a novel role for melatonin in the epigenetic regulation of bHLH factors during neuronal differentiation. Our data showed that melatonin promoted neuronal differentiation by specifically increasing the acetylation of histone H3 lysine14 (H3K14). Increased H3K14 acetylation altered the chromatin state of the promoters of bHLH factors Neurogenin1 and NeuroD1 and activated their transcription; then, Neurogenin1 and NeuroD1 initiated and sustained the commitment to neuronal fates. As we know, CBP/p300 is an important class of histone acetyltransferases that acetylate histone H3K14, we found that melatonin activated the histone acetyltransferase activity of CREB-binding protein (CBP)/p300 via ERK signaling pathways. For the first time, we systematically showed the molecular mechanism of action of melatonin, which suggested that melatonin functions as a regulator of the acetylation-dependent gene expression network.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Li X,Chen X,Zhou W,Ji S,Li X,Li G,Liu G,Wang F,Hao Adoi
10.1016/j.neuroscience.2017.07.064subject
Has Abstractpub_date
2017-11-19 00:00:00pages
45-59eissn
0306-4522issn
1873-7544pii
S0306-4522(17)30550-Xjournal_volume
364pub_type
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