Article Publish Status: FREE
Abstract Title:

Genipin protects against H2O2-induced oxidative damage in retinal pigment epithelial cells by promoting Nrf2 signaling.

Abstract Source:

Int J Mol Med. 2019 Feb ;43(2):936-944. Epub 2018 Dec 12. PMID: 30569096

Abstract Author(s):

Hailan Zhao, Ruiqing Wang, Mingxia Ye, Lan Zhang

Article Affiliation:

Hailan Zhao


Oxidative stress serves a vital function in the pathogenesis of age‑related macular degeneration (AMD); genipin (GP) possesses antioxidative properties. The present study aimed to investigate the effects of GP on retinal pigment epithelial (RPE) cells induced by H2O2 and the underlying mechanism. ARPE‑19 cells were subjected to H2O2 treatment to induce oxidative damage. Cell viability was determined via an MTT assay. Reactive oxygen species (ROS) levels and cell apoptosis were detected by flow cytometry. Nuclear factor‑erythroid 2‑related factor‑2 (Nrf2) signaling‑associated and the expression of apoptosis‑associated factors were measured usingreverse transcription‑quantitative polymerase chain reaction assay and western blotting. The results revealed that 200 µM H2O2 and 30 µM GP were determined to be the optimal concentrations for subsequent experimentation. GP reversed the inhibitory effects of H2O2 by promoting cell viability, attenuating ROS accumulation and cell apoptosis, and increased the expression of Nrf2, heme oxygenase‑1 (HO‑1) and NAD(P)H: Quinine oxidoreductase 1 (NQO1); Nrf2 silencing inhibited HO‑1 and NQO1 expression. In addition, Nrf2 silencing enhanced the effects of H2O2 by promoting ROS production andcell apoptosis. Compared with H2O2, Nrf2 silencing further decreased the expression levels of B‑cell lymphoma‑2 (Bcl‑2), but increased that of Bcl‑2‑associated X protein and cleaved‑caspase‑3. The results of the present study revealed that Nrf2 silencing attenuated the protective effects of GP on H2O2‑induced injury in ARPE‑19 cells by promoting apoptosis and oxidation. Collectively, GP attenuated oxidative damage induced by H2O2 in ARPE‑19 cells. Furthermore, the molecular mechanism may be associated with the Nrf2 signaling pathway. The findings of the present study nay provide insight into a potential therapeutic agent for the treatment of AMD.

Study Type : In Vitro Study

Print Options

Key Research Topics

Sayer Ji
Founder of GreenMedInfo.com

Subscribe to our informative Newsletter & get Nature's Evidence-Based Pharmacy

Our newsletter serves 500,000 with essential news, research & healthy tips, daily.

Download Now

500+ pages of Natural Medicine Alternatives and Information.

This website is for information purposes only. By providing the information contained herein we are not diagnosing, treating, curing, mitigating, or preventing any type of disease or medical condition. Before beginning any type of natural, integrative or conventional treatment regimen, it is advisable to seek the advice of a licensed healthcare professional.

© Copyright 2008-2021 GreenMedInfo.com, Journal Articles copyright of original owners, MeSH copyright NLM.