Details

Autor(en) / Beteiligte

• Jiao, Xiaocui
• Li, Ying
• Zhang, Tao
• Liu, Maodong
• Chi, Yanqing

Titel

Role of Sirtuin3 in high glucose-induced apoptosis in renal tubular epithelial cells

Ist Teil von

• Biochemical and biophysical research communications, 2016-11, Vol.480 (3), p.387-393

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2016

Quelle

MEDLINE

Beschreibungen/Notizen

• The apoptosis of renal tubular epithelial cells contributes to the pathogenesis of diabetic nephropathy. High glucose-induced mitochondrial oxidative stress is considered to be an important mediator for renal tubular cell apoptosis. Sirtuin3(Sirt3), a kind of mitochondria-localized nicotinamide adenine dinucleotide(NAD+)-dependent protein deacetylase, has been reported to regulate the generation of ROS in mitochondria through regulating acetylation level and activity of several key mitochondrial enzymes. In this study, we investigated the role of Sirt3 on high glucose-induced apoptosis in HK-2 cells. High glucose decreased the protein and mRNA expression of Sirt3 in a time-dependent manner, along with increased cell apoptosis in HK-2 cells. Furthermore, high glucose-induced oxidative stress and apoptosis were reversed by Sirt3 overexpression or antioxidant treatment. Meanwhile, we also found that overexpression of Sirt3 or antioxidant could regulate the activity of Akt/FoxO signaling pathway associated with cell apoptosis in diabetic nephropathy. In conclusion, our data suggest that Sirt3 overexpression antagonize high glucose-induced apoptosis by controlling ROS accumulation and ROS-sensitive Akt/FoxO signaling pathway in HK-2 cells. •HG decreases the expression of Sirt3 in a time-dependent manner.•Overexpression of Sirt3 reduces HG-induced oxidative stress and apoptosis.•Overexpression of Sirt3 exerts its anti-apoptotic effect by regulating ROS-sensitive Akt/FoxO signaling pathway.