Isorhamnetin prevents H2O2‑induced oxidative stress in human retinal pigment epithelial cells

Wang,Jing; Gong,Hui‑Min; Zou,Hui‑Hui; Liang,Ling; Wu,Xin‑Yi

doi:10.3892/mmr.2017.7916

Isorhamnetin prevents H2O2‑induced oxidative stress in human retinal pigment epithelial cells

Authors:
- Jing Wang
- Hui‑Min Gong
- Hui‑Hui Zou
- Ling Liang
- Xin‑Yi Wu
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Affiliations: Department of Ophthalmology, Qi Lu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China, Ophthalmic Center, Qingdao Municipal Hospital, Qingdao, Shandong 266000, P.R. China, Department of Ophthalmology, Dezhou People's Hospital, Dezhou, Shandong 253014, P.R. China
Published online on: October 27, 2017 https://doi.org/10.3892/mmr.2017.7916
Pages: 648-652

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Abstract

Isorhamnetin, a 3‑O‑methylated metabolite of quercetin, exhibits antioxidant effects. However, to the best of our knowledge, no study to date has focused on the effects of isorhamnetin on retinal pigment epithelium (RPE) cells, and its underlying molecular mechanisms. Therefore, the present study aimed to examine the potential protective effect of isorhamnetin against oxidative stress in human RPE cells. The results demonstrated that pretreatment of RPE cells with isorhamnetin significantly protected cell viability against oxidative stress. In addition, isorhamnetin pretreatment inhibited hydrogen peroxide (H2O2)‑induced reactive oxygen species (ROS) production and caspase‑3 activation in RPE cells. Furthermore, isorhamnetin pretreatment significantly increased the phosphorylation of phosphoinositide 3‑kinase (PI3K) and AKT serine/threonine kinase 1 (Akt) in RPE cells exposed to H2O2, compared with cells treated with H2O2 alone. Taken together, the present results demonstrated that isorhamnetin protected human RPE cells from oxidative stress‑induced cell death, and this effect was associated with activation of the PI3K/Akt signaling pathway. Thus, isorhamnetin may be considered as a potential antioxidant useful for the prevention of age‑related macular degeneration.

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