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2017 ; 14
(1
): 515-524
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Salidroside inhibits high-glucose induced proliferation of vascular smooth muscle
cells via inhibiting mitochondrial fission and oxidative stress
#MMPMID28672961
Zhuang X
; Maimaitijiang A
; Li Y
; Shi H
; Jiang X
Exp Ther Med
2017[Jul]; 14
(1
): 515-524
PMID28672961
show ga
The mitochondria are highly dynamic organelles, carefully maintaining network
homeostasis by regulating mitochondrial fusion and fission. Mitochondrial
dynamics are involved in the regulation of a variety of pathophysiological
processes, including cell proliferation. Oxidative stress serves an important
role in the remodeling of arterial vascular tissue in diabetic patients by
affecting the proliferation of vascular smooth muscle cells (VSMCs). Salidroside
is the primary active component of Rhodiola rosea and has been demonstrated to be
an antioxidant with cardio- and vascular-protective effects, in addition to
improving glucose metabolism. Therefore, the present study aimed to examine the
impact of Salidroside on VSMC proliferation, reactive oxygen species (ROS)
generation and mitochondrial dynamics under high glucose conditions and the
potential mechanisms involved. The current study used Salidroside and a
mitochondrial division inhibitor, specifically of Drp1 (Mdivi-1) to treat VSMCs
under high glucose conditions for 24 h and assessed VSMCs proliferation, the
state of mitochondrial fission and fusion and the expression level of proteins
related to mitochondrial dynamics including dynamin-related protein (Drp1) and
mitofusin 2 (Mfn2), ROS level and nicotinamide adenine dinucleotide phosphate
oxidase activity. The results of the present study indicate that Salidroside and
Mdivi-1 inhibit VSMC proliferation, Drp1 expression and oxidative stress and
upregulate Mfn2 expression (all P<0.05). The inhibitive effect on VSMC
proliferation may be partly reversed by exogenous ROS. In addition, the
inhibitive effect on VSMCs proliferation and oxidative stress may also be in part
reversed by Mfn2-siRNA. Collectively, these data suggest that Salidroside
inhibits VSMCs proliferation induced by high-glucose and may perform its
therapeutic effect via maintaining mitochondrial dynamic homeostasis and
regulating oxidative stress level, with Mfn2 as a therapeutic target.