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2015 ; 8
(3
): 2274-87
Nephropedia Template TP
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English Wikipedia
Silent information regulator 1 (SIRT1) promotes the migration and proliferation
of endothelial progenitor cells through the PI3K/Akt/eNOS signaling pathway
#MMPMID26045735
Li W
; Du D
; Wang H
; Liu Y
; Lai X
; Jiang F
; Chen D
; Zhang Y
; Zong J
; Li Y
Int J Clin Exp Pathol
2015[]; 8
(3
): 2274-87
PMID26045735
show ga
Silent information regulator 1 (SIRT1) mediates many effects of caloric
restriction (CR) on an organism's lifespan and metabolic pathways. Recent reports
have also emphasized its role in vascular function. The present study was
designed to investigate the effects of SIRT1 on the properties of mouse spleen
derived endothelial progenitor cells (EPCs). SIRT1 in EPCs was significantly
increased by serum and by vascular endothelial growth factor (VEGF). Moreover, an
adenovirus (Ad) vector expressing SIRT1 (Ad-SIRT1)-mediated overexpression of
SIRT1 directly enhanced migration and proliferation of EPCs, whereas silencing of
endogenous SIRT1 in EPCs inhibited cell functions. In addition, LY294002 (a PI3K
inhibitor), sc-221226 (an Akt inhibitor), and L-NAME (an NOS inhibitor) abolished
Ad-SIRT1-induced migration and proliferation of EPCs, and prevented nitric oxide
(NO) production. Phosphorylation of Akt, PI3K, and endothelial nitricoxide
synthase (eNOS) were up-regulated by Ad-SIRT1, which was attenuated by LY294002,
sc-221226, and L-NAME. Together, the results suggested that through the
PI3K/Akt/eNOS signaling pathway, SIRT1 plays an important role in the biological
properties of EPCs.