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Journal Article
Research Support, Non-U.S. Gov't
Keratinocyte growth factor protects endometrial cells from oxygen glucose deprivation/re-oxygenation via activating Nrf2 signaling.
Biochemical and Biophysical Research Communications 2018 June 19
Oxygen and glucose deprivation (OGD)-re-oxygenation (OGDR) exposure to endometrial cells mimics ischemia-reperfusion injury. The present study tests the potential effect of keratinocyte growth factor (KGF) on the process. We show that KGF receptor KGFR is expressed in human endometrial T-HESC cells and primary murine endometrial cells. KGF pre-treatment protected endometrial cells from OGDR, inhibiting cell viability reduction and cell death. KGF attenuated OGDR-induced programmed necrosis in endometrial cells. Significantly, KGF activated Nrf2 signaling, causing Nrf2 Ser-40 phosphorylation, protein stabilization, nuclear translocation to promote anti-oxidant gene (HO1, NOQ1 and GCLC) expression. Nrf2 silencing (by targeted shRNAs) or CRISPR/Cas9 knockout almost abolished KGF-induced endometrial cell protection against OGDR. Furthermore, KGF activated Akt-mTOR signaling in endometrial cells. Whereas Akt-mTOR inhibitors (LY294002, AZD2014 and RAD001) abolished KGF-induced Nrf2 activation and anti-OGDR cytoprotection. Together, KGF protects endometrial cells from OGDR via activating Akt-mTOR-Nrf2 signaling.
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