Abstract
Diabetic retinopathy (DR) is one of the most common and serious microvascular complications of diabetes. Although current treatments can control the progression of DR to a certain extent, there is no effective treatment for early DR. Apart from vascular endothelial growth factor, it has been noted that the apelin/APJ system contributes to the pathogenesis of DR. We used a high-fat diet/streptozotocin-induced type 2 diabetic mouse model. The mice were divided into a lentivirus control group (LV-EGFP), an apelin-overexpression group (LV-Apelin+), and an apelin-knockdown group (LV-Apelin−), all of which were administrated intravitreal injections. LV-Apelin+ ameliorated the loss of pericytes in DR mice, whereas LV-Apelin− aggravated the loss of pericytes. Similarly, LV-Apelin+ reduced the leakage of retinal vessels, whereas LV-Apelin− exacerbated it. The genes and signaling pathway related to cell adhesion molecules were downregulated, whereas the cell–cell tight junctions and anti-apoptotic genes were upregulated in response to apelin overexpression. However, the alterations of these same genes and signaling pathways were reversed in the case of apelin knockdown. Additionally, LV-Apelin+ increased ZO-1 and occludin levels, whereas LV-Apelin− decreased them. Our results suggest that apelin can reduce vascular leakage by protecting pericytes, which offers a promising new direction for the early treatment of DR.
Funder
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Beijing Hospitals Authority’s Ascent Plan
Beijing Talent Project
Shunyi District Beijing Science and technology achievements transformation coordination and service platform construction
Beijing Hospitals Authority Youth Programme
Subject
Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis
Reference32 articles.
1. Incidence of sight-threatening diabetic retinopathy in people with Type 2 diabetes mellitus and numbers needed to screen: A systematic review;Diabet. Med.,2019
2. Prevalence and risk factors for diabetic retinopathy in a cross-sectional population-based study from rural southern China: Dongguan Eye Study;BMJ Open,2019
3. From pathobiology to the targeting of pericytes for the treatment of diabetic retinopathy;Curr. Diabetes Rep.,2015
4. Caporarello, N., D’Angeli, F., Cambria, M.T., Candido, S., Giallongo, C., Salmeri, M., Lombardo, C., Longo, A., Giurdanella, G., and Anfuso, C.D. (2019). Pericytes in Microvessels: From “Mural” Function to Brain and Retina Regeneration. Int. J. Mol. Sci., 20.
5. Plastic roles of pericytes in the blood-retinal barrier;Nat. Commun.,2017
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