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Xanthine derivative KMUP-1 ameliorates retinopathy
Jwu-Lai Yeh1, Cheng-Hsiang Kuo2, Po-Wen Shih3
1Department of Pharmacology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan; Department of Marine Biotechnology and Resources, National Sun Yat-sen University, 80424 Kaohsiung, Taiwan.
KMUP-1, a xanthine derivative, shows promise for treating retinopathy by reducing abnormal blood vessel growth, inflammation, and cell death in hypoxic conditions.
Area of Science:
- Ophthalmology
- Molecular Biology
- Pharmacology
Background:
- Retinal neovascularization (RNV) and apoptosis in retinopathy cause vision loss.
- Hypoxia and inflammation drive increased vascular endothelial growth factor (VEGF), leading to RNV.
Purpose of the Study:
- To investigate the therapeutic potential of KMUP-1, a xanthine derivative, in mitigating hypoxia-induced retinal conditions.
- To evaluate KMUP-1's anti-inflammatory, anti-apoptotic, and anti-angiogenic effects.
Main Methods:
- In vitro studies using hypoxic retinal endothelial cells (RF/6A) at 1% O2.
- In vivo studies using an oxygen-induced retinopathy (OIR) mouse model.
- Analysis of signaling pathways (PI3K/Akt, ERK, RhoA/ROCKs, eNOS, sGC) and gene/protein expression (VEGF, HIF-1α, IL-1β, TNF-α, ICAM-1, BCL-2/BAX ratio).
Main Results:
- KMUP-1 inhibited endothelial migration and tube formation in vitro without cytotoxicity.
- KMUP-1 suppressed upregulation of HIF-1α, VEGF, IL-1β, and TNF-α in hypoxic endothelial cells.
- KMUP-1 mitigated vaso-obliteration and neovascularization in the OIR mouse model, reducing VEGF, ICAM-1, TNF-α, IL-1β, and increasing BCL-2/BAX ratio.
Conclusions:
- KMUP-1 demonstrates significant therapeutic potential for retinopathy.
- Its triple action includes anti-angiogenesis, anti-inflammation, and anti-apoptosis in hypoxic endothelium.
