Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study
Abstract Purpose The aim of this study was to investigate the underlying mechanisms of diabetic retinopathy (DR) development. Methods Real-Time qPCR was used to detect Casein kinase 2 interacting protein-1 (CKIP-1) and Nuclear factor E2-related factor 2 (Nrf2) mRNA levels. Western Blot was employed...
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doaj-fd1bb44b09de4e7691a52a7c6f5760122020-11-25T02:58:57ZengBMCCell & Bioscience2045-37012019-08-019111210.1186/s13578-019-0331-xUpregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro studyLan Zhang0Jie Yu1Mingxia Ye2Hailan Zhao3Department of Ophthalmology, Zhejiang Provincial People’s HospitalDepartment of Ophthalmology, Zhejiang Provincial People’s HospitalDepartment of Ophthalmology, Zhejiang Provincial People’s HospitalDepartment of Ophthalmology, Zhejiang Provincial People’s HospitalAbstract Purpose The aim of this study was to investigate the underlying mechanisms of diabetic retinopathy (DR) development. Methods Real-Time qPCR was used to detect Casein kinase 2 interacting protein-1 (CKIP-1) and Nuclear factor E2-related factor 2 (Nrf2) mRNA levels. Western Blot was employed to detect protein levels. Malondialdehyde (MDA) assay kit, superoxide dismutase (SOD) kit and glutathione peroxidase (GSH-Px) kit were used to evaluate oxidative stress in high-glucose treated human retinal endothelial cells (HRECs). Calcein-AM/propidium iodide (PI) double stain kit was employed to detect cell apoptosis. Enzyme-linked ImmunoSorbent Assay (ELISA) was used to detect inflammation associated cytokines secretion. Co-immunoprecipitation (CO-IP) was performed to investigate the interactions between CKIP-1 and Nrf2. Luciferase reporter gene system was used to detect the transcriptional activity of Nrf2. Results CKIP-1 was significantly downregulated in either DR tissues or high-glucose treated HRECs comparing to the Control groups. Besides, high-glucose (25 mM) inhibited HRECs viability and induced oxidative stress, inflammation associated cytokines (TNF-α, IL-6 and IL-1β) secretion and cell apoptosis, which were all reversed by synergistically overexpressing CKIP-1 and aggravated by knocking down CKIP-1. Of note, we found that overexpressed CKIP-1 activated Nrf2/ARE signaling pathway and increased its downstream targets including HO-1, NQO-1, γGCS and SOD in high-glucose treated HRECs. Further results also showed that CKIP-1 regulated cell viability, oxidative stress, inflammation and apoptosis in high-glucose treated HRECs by activating Nrf2/ARE signaling pathway. Conclusion We concluded that overexpressed CKIP-1 alleviated DR progression by activating Nrf2/ARE signaling pathway.http://link.springer.com/article/10.1186/s13578-019-0331-xDiabetic retinopathyInflammationOxidative stressCKIP-1Nrf2/ARE signal pathway |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lan Zhang Jie Yu Mingxia Ye Hailan Zhao |
spellingShingle |
Lan Zhang Jie Yu Mingxia Ye Hailan Zhao Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study Cell & Bioscience Diabetic retinopathy Inflammation Oxidative stress CKIP-1 Nrf2/ARE signal pathway |
author_facet |
Lan Zhang Jie Yu Mingxia Ye Hailan Zhao |
author_sort |
Lan Zhang |
title |
Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study |
title_short |
Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study |
title_full |
Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study |
title_fullStr |
Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study |
title_full_unstemmed |
Upregulation of CKIP-1 inhibits high-glucose induced inflammation and oxidative stress in HRECs and attenuates diabetic retinopathy by modulating Nrf2/ARE signaling pathway: an in vitro study |
title_sort |
upregulation of ckip-1 inhibits high-glucose induced inflammation and oxidative stress in hrecs and attenuates diabetic retinopathy by modulating nrf2/are signaling pathway: an in vitro study |
publisher |
BMC |
series |
Cell & Bioscience |
issn |
2045-3701 |
publishDate |
2019-08-01 |
description |
Abstract Purpose The aim of this study was to investigate the underlying mechanisms of diabetic retinopathy (DR) development. Methods Real-Time qPCR was used to detect Casein kinase 2 interacting protein-1 (CKIP-1) and Nuclear factor E2-related factor 2 (Nrf2) mRNA levels. Western Blot was employed to detect protein levels. Malondialdehyde (MDA) assay kit, superoxide dismutase (SOD) kit and glutathione peroxidase (GSH-Px) kit were used to evaluate oxidative stress in high-glucose treated human retinal endothelial cells (HRECs). Calcein-AM/propidium iodide (PI) double stain kit was employed to detect cell apoptosis. Enzyme-linked ImmunoSorbent Assay (ELISA) was used to detect inflammation associated cytokines secretion. Co-immunoprecipitation (CO-IP) was performed to investigate the interactions between CKIP-1 and Nrf2. Luciferase reporter gene system was used to detect the transcriptional activity of Nrf2. Results CKIP-1 was significantly downregulated in either DR tissues or high-glucose treated HRECs comparing to the Control groups. Besides, high-glucose (25 mM) inhibited HRECs viability and induced oxidative stress, inflammation associated cytokines (TNF-α, IL-6 and IL-1β) secretion and cell apoptosis, which were all reversed by synergistically overexpressing CKIP-1 and aggravated by knocking down CKIP-1. Of note, we found that overexpressed CKIP-1 activated Nrf2/ARE signaling pathway and increased its downstream targets including HO-1, NQO-1, γGCS and SOD in high-glucose treated HRECs. Further results also showed that CKIP-1 regulated cell viability, oxidative stress, inflammation and apoptosis in high-glucose treated HRECs by activating Nrf2/ARE signaling pathway. Conclusion We concluded that overexpressed CKIP-1 alleviated DR progression by activating Nrf2/ARE signaling pathway. |
topic |
Diabetic retinopathy Inflammation Oxidative stress CKIP-1 Nrf2/ARE signal pathway |
url |
http://link.springer.com/article/10.1186/s13578-019-0331-x |
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