Abstract Title:

Resveratrol Inhibits Diabetic-Induced Müller Cells Apoptosis through MicroRNA-29b/Specificity Protein 1 Pathway.

Abstract Source:

Mol Neurobiol. 2016 Jun 16. Epub 2016 Jun 16. PMID: 27311771

Abstract Author(s):

Kaihong Zeng, Yuan Wang, Na Yang, Duozi Wang, Suping Li, Jian Ming, Jing Wang, Xuemei Yu, Yi Song, Xue Zhou, Bo Deng, Xiaona Wu, Lujiao Huang, Yongtao Yang

Article Affiliation:

Kaihong Zeng


The aim of this study was to evaluate the anti-apoptosis effects of resveratrol (RSV) on diabetic rats retinal Müller cells in vivo and in vitro and to further investigate the roles of microRNA-29b (miR-29b)/specificity protein 1 (SP1) in the anti-apoptosis mechanism of RSV. Retina was obtained from normal and diabetic rats with or without RSV (5 and 10 mg/kg/day) treatments at 1-7 months. TdT-mediated dUTP-biotin nick end labeling (TUNEL) and Annexin V/PI staining were used to detect apoptosis. Immunofluorescence was used to assess distribution of SP1 in retina. MiR-29b and SP1 messenger RNA (mRNA) expression was evaluated by quantitative real-time polymerase chain reaction (qRT-PCR). SP1, Bax, andbcl-2 protein expression was evaluated by western blotting. Caspase-3 activity was detected by assay kit. Our study showed that the TUNEL-positive cells were mainly localized in the inner nuclear layer (INL) of retina and RSV administration effectively suppressed streptozotocin (STZ)-induced apoptosis of retinal cells in INL in vivo (P < 0.001). Our study also showed that RSV administration effectively suppressed high glucose (HG)-induced retinal Müller cells' apoptosis in vitro (P < 0.001). Furthermore, our study revealed that the diabetes-induced downregulated expression of miR-29b and upregulated expression of SP1 could be rescued by RSV in vivo and in vitro (P < 0.05). The anti-apoptosis effect and downregulated SP1 expression effect of RSV was prevented by miR-29b inhibitor (P < 0.05). MiR-29b mimic increased the above-mentioned effects of RSV (P < 0.001). These findings indicate that RSV is a potential therapeutic option for diabetic retinopathy (DR) and that miR-29b/SP1 pathway play roles in the anti-apoptosis mechanism of RSV.

Study Type : Animal Study, In Vitro Study

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Sayer Ji
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