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Vasović DD, Ivković S, Živanović A, Major T, Milašin JM, Nikolić NS, Simonović JM, Šutulović N, Hrnčić D, Stanojlović O, Vesković M, Rašić DM, Mladenović D. Reduced light exposure mitigates streptozotocin-induced vascular changes and gliosis in diabetic retina by an anti-inflammatory effect and increased retinal cholesterol turnover. Chem Biol Interact 2024; 394:110996. [PMID: 38593908 DOI: 10.1016/j.cbi.2024.110996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 04/11/2024]
Abstract
Diabetic retinopathy is not cured efficiently and changes of lifestyle measures may delay early retinal injury in diabetes. The aim of our study was to investigate the effects of reduced daily light exposure on retinal vascular changes in streptozotocin (STZ)-induced model of DM with emphasis on inflammation, Aqp4 expression, visual cycle and cholesterol metabolism-related gene expression in rat retina and RPE. Male Wistar rats were divided into the following groups: 1. control; 2. diabetic group (DM) treated with streptozotocin (100 mg/kg); 3. group exposed to light/dark cycle 6/18 h (6/18); 4. diabetic group exposed to light/dark cycle 6/18 h (DM+6/18). Retinal vascular abnormalities were estimated based on lectin staining, while the expression of genes involved in the visual cycle, cholesterol metabolism, and inflammation was determined by qRT-PCR. Reduced light exposure alleviated vasculopathy, gliosis and the expression of IL-1 and TNF-α in the retina with increased perivascular Aqp4 expression. The expression of genes involved in visual cycle and cholesterol metabolism was significantly up-regulated in RPE in DM+6/18 vs. DM group. In the retina only the expression of APOE was significantly higher in DM+6/18 vs. DM group. Reduced light exposure mitigates vascular changes and gliosis in DM via its anti-inflammatory effect, increased retinal cholesterol turnover and perivascular Aqp4 expression.
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Affiliation(s)
- Dolika D Vasović
- Eye Hospital, University Clinical Centre of Serbia, 11000, Belgrade, Serbia
| | - Sanja Ivković
- Department of Molecular Biology and Endocrinology, Vinca - Institute for Nuclear Sciences, National Institute of Republic of Serbia, University of Belgrade, 11000, Belgrade, Serbia
| | - Ana Živanović
- Department of Molecular Biology and Endocrinology, Vinca - Institute for Nuclear Sciences, National Institute of Republic of Serbia, University of Belgrade, 11000, Belgrade, Serbia
| | - Tamara Major
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, 11000, Belgrade, Serbia
| | - Jelena M Milašin
- Department of Human Genetics, School of Dental Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Nađa S Nikolić
- Department of Human Genetics, School of Dental Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Jelena M Simonović
- Department of Human Genetics, School of Dental Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Nikola Šutulović
- Laboratory for Neurophysiology, Institute of Medical Physiology "Richard Burian", Faculty of Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Dragan Hrnčić
- Laboratory for Neurophysiology, Institute of Medical Physiology "Richard Burian", Faculty of Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Olivera Stanojlović
- Laboratory for Neurophysiology, Institute of Medical Physiology "Richard Burian", Faculty of Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Milena Vesković
- Institute of Pathophysiology "Ljubodrag Buba Mihailovic", Faculty of Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Dejan M Rašić
- Eye Hospital, University Clinical Centre of Serbia, 11000, Belgrade, Serbia; School of Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Dušan Mladenović
- Institute of Pathophysiology "Ljubodrag Buba Mihailovic", Faculty of Medicine, University of Belgrade, 11000, Belgrade, Serbia.
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Myagmar BO, Chen R, Zhang X, Xu R, Jiang W, Cao W, Ji H, Zhang X. Cerebroprotein hydrolysate injection is involved in promoting long-term angiogenesis, vessel diameter and density after cerebral ischemia in mice. Life Sci 2022; 300:120568. [PMID: 35489566 DOI: 10.1016/j.lfs.2022.120568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 04/17/2022] [Accepted: 04/18/2022] [Indexed: 12/09/2022]
Abstract
AIMS In this study, we aimed investigate the impacts of CH-I on angiogenesis, effects for vascular structure changes and long-term neurological recovery after ischemic stroke as well as the potential mechanisms. MAIN METHODS Young male mice subjected to intraluminal middle cerebral artery occlusion were administrated with CH-I once daily from day 1 to day 14 after stroke. The infarct volume was evaluated by TTC staining at day 7 after stroke. Neurological deficits were measured 1 to 28 days after stroke. Microvascular density, astrocyte coverage, and angiogenesis were assessed by IF, qRT-PCR, and WB at regular intervals after stroke. LSCI and TPMI measured changes in blood flow and vascular density and width from the day after stroke to day 28. KEY FINDINGS Compared with the dMCAO group, CH-I treatment significantly improved neurological recovery and reduced the infarct at day 7 after stroke. CH-I treatment increased the expression of the CD31, BrdU+/CD31+ microvessels and GFAP positive vessels in the peri-infarct cortex at day 7 to 28 after stroke. The expression of protein and gene were enhanced in CH-I group. CH-I significantly improved cerebral blood flow at day 7 after stroke. CH-I increased the vascular density and vascular width at day 14 after stroke. SIGNIFICANCE CH-I has been shown to restore nerve function, reduce the rate of cerebral infarction, increase microvascular density, and promote angiogenesis. CH-I improved cerebral blood flow, protected blood vessels from postoperative stenosis, and improved vascular plasticity.
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Affiliation(s)
- Bat-Otgon Myagmar
- Department of Neurology, Second Hospital of Hebei Medical University, Hebei Medical University Shijiazhuang, Hebei 050000, People's Republic of China
| | - Rong Chen
- Hebei Collaborative Innovation Center for Cardio- Cerebrovascular Disease, Shijiazhuang, Hebei 050000, People's Republic of China; Hebei Key Laboratory of Vascular Homeostasis, Shijiazhuang, Hebei 050000, People's Republic of China
| | - Xiao Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Hebei Medical University Shijiazhuang, Hebei 050000, People's Republic of China
| | - Renhao Xu
- Hebei Collaborative Innovation Center for Cardio- Cerebrovascular Disease, Shijiazhuang, Hebei 050000, People's Republic of China; Hebei Key Laboratory of Vascular Homeostasis, Shijiazhuang, Hebei 050000, People's Republic of China
| | - Wei Jiang
- Hebei Collaborative Innovation Center for Cardio- Cerebrovascular Disease, Shijiazhuang, Hebei 050000, People's Republic of China; Hebei Key Laboratory of Vascular Homeostasis, Shijiazhuang, Hebei 050000, People's Republic of China
| | - Wen Cao
- Department of Neurology, Second Hospital of Hebei Medical University, Hebei Medical University Shijiazhuang, Hebei 050000, People's Republic of China
| | - Hui Ji
- Department of Neurology, Second Hospital of Hebei Medical University, Hebei Medical University Shijiazhuang, Hebei 050000, People's Republic of China
| | - Xiangjian Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Hebei Medical University Shijiazhuang, Hebei 050000, People's Republic of China; Hebei Collaborative Innovation Center for Cardio- Cerebrovascular Disease, Shijiazhuang, Hebei 050000, People's Republic of China; Hebei Key Laboratory of Vascular Homeostasis, Shijiazhuang, Hebei 050000, People's Republic of China.
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