S-Space College of Medicine/School of Medicine (의과대학/대학원) Dept. of Medicine (의학과) Journal Papers (저널논문_의학과)
Hypoxia-mediated retinal neovascularization and vascular leakage in diabetic retina is suppressed by HIF-1 alpha destabilization by SH-1242 and SH-1280, novel hsp90 inhibitors
- Issue Date
- Springer Verlag
- Journal of Molecular Medicine, Vol.92 No.10, pp.1083-1092
- In diabetic retinopathy (DR), visual deterioration is related with retinal neovascularization and vascular hyperpermeability. Anti-vascular endothelial growth factor (VEGF) agents are currently utilized to suppress retinal neovascularization and macular edema (ME); however, there are still concerns on the widespread use of them because VEGF is a trophic factor for neuronal and endothelial cells in the retina. As an alternative treatment strategy for DR, it is logical to address hypoxia-related molecules to treat DR because the retina is in relative hypoxia as DR progresses. In this study, we demonstrate that destabilization of hypoxia-inducible factor-1 alpha (HIF-1 alpha) by SH-1242 and SH-1280, novel heat shock protein 90 (hsp90) inhibitors, leads to suppression of hypoxia-mediated retinal neovascularization and vascular leakage in diabetic retina. In vitro experiments showed that these inhibitors inhibited hypoxia-induced upregulation of target genes of HIF-1 alpha and further secretion of VEGF. Furthermore, these inhibitors effectively suppressed expression of target genes of HIF-1 alpha including vegfa in the retina of oxygen-induced retinopathy (OIR) mice. Interestingly, despite hsp90 inhibition, these inhibitors do not induce definite toxicity at the level of gene expression, cellular viability, and histologic integrity. We suggest that SH-1242 and SH-1280 can be utilized in the treatment of DR, as an alternative treatment of direct VEGF inhibition. Key message SH-1242 and SH-1280 are novel hsp90 inhibitors similar to deguelin. HIF-1 alpha destabilization by hsp90 inhibition leads to anti-angiogenic effects. Despite hsp90 inhibition, both inhibitors do not induce definite toxicity. HIF-1 alpha modulation can be a safer therapeutic option than direct VEGF inhibition.
- Files in This Item: There are no files associated with this item.
- Appears in Collections:
- College of Medicine/School of Medicine (의과대학/대학원)Dept. of Medicine (의학과)Journal Papers (저널논문_의학과)
College of Pharmacy (약학대학)Dept. of Pharmacy (약학과)Journal Papers (저널논문_약학과)
College of Pharmacy (약학대학)Dept. of Manufacturing Pharmacy (제약학과)Journal Papers (저널논문_제약학과)
College of Medicine/School of Medicine (의과대학/대학원)Dept. of Biomedical Sciences (대학원 의과학과)Journal Papers (저널논문_의과학과)