DNMT1, a Novel Regulator Mediating mTORC1/mTORC2 Pathway-Induced NGF Expression in Schwann Cells.

DNMT1, a Novel Regulator Mediating mTORC1/mTORC2 Pathway-Induced NGF Expression in Schwann Cells. Neurochem Res. 2018 Sep 18;: Authors: Cheng M, Lv X, Zhang C, Du W, Liu Y, Zhu L, Hao J Abstract Schwann cells play an important role in maintaining the normal function of peripheral nerves via the secretion of nerve growth factor (NGF). The mTOR signaling pathway is known as a kind of Ser/Thr protein kinase that regulates various cell functions. DNA methyltransferase 1 (DNMT1) is an epigenetic regulator and downstream target of the mTOR pathway. In the present study, we explored the relationship between NGF expression and the mTOR pathway/DNMT1 in RSC96 cells. The results showed that both rapamycin and Torin 1 downregulated NGF expression via the inhibition of phospho-mTOR (Ser 2448) and phospho-S6K1 (Thr 389). Similarly, the silencing of RAPTOR and RICTOR decreased NGF expression by 56.7% and 52.4%, respectively, in RSC96 cells compared with the control siRNA treatment, which was accompanied by reduced phospho-S6K1 (Thr 389). The mTOR/S6K1 activator MHY1485 increased NGF expression by 28.7% and 17.1% 1 day and 2 day after stimulation, respectively, compared to the corresponding control group in RSC96 cells. Furthermore, DNMT1 was enhanced by 94.5% and 42.5% with mTOR pathway inhibitor (rapamycin and Torin 1, respectively) treatment for 3 day compared with the control group. Additionally, the inhibition of DNMT1 with a chemical inhib...
Source: Neurochemical Research - Category: Neuroscience Authors: Tags: Neurochem Res Source Type: research