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2017 ; 23
(ä): 4067-4076
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Salidroside Reduces High-Glucose-Induced Podocyte Apoptosis and Oxidative Stress
via Upregulating Heme Oxygenase-1 (HO-1) Expression
#MMPMID28831032
Lu H
; Li Y
; Zhang T
; Liu M
; Chi Y
; Liu S
; Shi Y
Med Sci Monit
2017[Aug]; 23
(ä): 4067-4076
PMID28831032
show ga
BACKGROUND Hyperglycemia is one of the most dangerous factors causing diabetic
nephropathy. Salidroside is considered to have the effects of reducing oxidative
stress damage and improving cell viability. This study was performed to
investigate whether and how salidroside reduces high-glucose (HG)-induced
apoptosis in mouse podocytes. MATERIAL AND METHODS We examined whether
salidroside could decrease HG-induced podocyte oxidative stress and podocyte
apoptosis in vitro. The potential signaling pathways were also investigated.
Podocytes (immortalized mouse epithelial cells) were treated with normal glucose
(5.5 mM) as control or HG (30 mM), and then exposed to salidroside treatment.
RESULTS HG enhanced the generation of intracellular reactive oxygen species (ROS)
and apoptosis in podocytes. Salidroside reduced HG-induced apoptosis-related
consequences via promoting HO-1 expression. Salidroside increased the expression
level of phosphorylated Akt (p-Akt) and phosphorylated ILK (p-ILK), p-JNK, and
p-ERK and localization of Nrf-2. JNK inhibitor and ILK inhibitor decreased HO-1
expression to different degrees. Moreover, specific siRNAs of ILK, Nrf-2, and
HO-1, and inhibitors of HO-1 and ILK significantly increased ROS generation and
Caspase9/3 expression in the presence of salidroside and HG. CONCLUSIONS The
results suggest that salidroside reduces HG-induced ROS generation and apoptosis
and improves podocytes viability by upregulating HO-1 expression. ILK/Akt, JNK,
ERK1/2, p38 MAPK, and Nrf-2 are involved in salidroside-decreased podocyte
apoptosis in HG condition.