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Remote Ischemic Conditioning Protects Diabetic Retinopathy in Streptozotocin-induced Diabetic Rats via Anti-Inflammation and Antioxidation

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机构: [1]Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Beijing, China. [2]Department of Ophthalmology, Xuanwu Hospital, Capital Medical University, Beijing, China. [3]Department of Herbal Formula Science Medicine, Chinese Medicine College, Beijing University of Chinese Medicine, Beijing, China. [4]Center of Cerebrovascular Disease Research, University of Pittsburgh School of Medicine, Pittsburgh, USA. [5]Center of Stroke, Beijing Institute for Brain Disorder, Beijing 100069, China
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关键词: diabetes mellitus diabetic retinopathy limb remote ischemic conditioning oxidative stress

摘要:
Ischemic conditioning inhibits oxidative stress and inflammatory response in diabetes. However, whether limb remote ischemic conditioning (LRIC) has beneficial effects on diabetic retinopathy (DR) remains unknown. This study aims to investigate the protective effects of LRIC in retinal ganglion cell in streptozotocin (STZ) induced Type 1 diabetic rats. A total of 48 healthy male Sprague-Dawley (200-220g) rats were randomly assigned to the normal group, normal+LRIC group, diabetes mellitus (DM) group and DM+LRIC group. Streptozotocin (STZ, 60 mg/kg) was intraperitoneally injected into the rats to establish the diabetic model. LRIC was conducted by tightening a tourniquet around the upper thigh and releasing for three cycles daily (10 mins x 3 cycles). Retinas were harvested after 12 weeks of LRIC treatment for histopathologic, Western blot and ELISA analysis. Plasma were collected at the same time for ELISA analysis. LRIC alleviated diabetic retinopathy symptoms as evidenced by the increased number of retinal ganglion cells (P<0.01) and decreased glial fibrillary acidic protein (GFAP) expression level (P<0.01) in the rat retina. LRIC in DM rats exhibited anti-inflammatory and antioxidative effects as confirmed by the down-regulation of pro-inflammatory cytokine: interleukin-6 (IL-6), and the up-regulation of antioxidants: superoxide dismutase (SOD), and glutathione (GSH)/oxidized glutathione (GSSG). Furthermore, LRIC significantly downregulated VEGF protein expression in the retina (P<0.01). These results suggest that the antioxidative and anti-inflammatory activities of LRIC may be important mechanisms involved in the protective effect of LRIC in STZ-induced diabetic rats.

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出版当年[2017]版
大类 | 2 区 医学
小类 | 2 区 老年医学
最新[2023]版:
大类 | 2 区 医学
小类 | 3 区 老年医学
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出版当年[2016]版:
Q1 GERIATRICS & GERONTOLOGY
最新[2023]版:
Q1 GERIATRICS & GERONTOLOGY

影响因子: 最新[2023版] 最新五年平均 出版当年[2016版] 出版当年五年平均 出版前一年[2015版] 出版后一年[2017版]

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第一作者机构: [1]Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Beijing, China. [5]Center of Stroke, Beijing Institute for Brain Disorder, Beijing 100069, China
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通讯机构: [*1]Xuanwu Hospital, Capital Medical University [*1]Xuanwu Hospital, Capital Medical University, Beijing 100053 China
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