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- W2123707760 abstract "Corneal cross-linking (CXL) is a treatment for keratoconus that eliminates the need for keratoplasty in most patients. However, its molecular mechanisms remain under study. Advanced glycation end products (AGEs) have been suggested by many studies as the causative strengthening agent during CXL, though no studies to date have directly tested this hypothesis.Corneas of young rabbits and sharks were pretreated with pyridoxal hydrochloride and copper ions before CXL. Two known inhibitors of AGE formation, aminoguanidine and rifampicin, were applied during CXL in the treatment solution. Tensile strength tests were conducted after these experiments to detect diminished or accentuated corneal stiffening after CXL. SDS-PAGE was performed on type I collagen cross-linked in the absence and presence of AGE inhibitors.Pretreatment with pyridoxal hydrochloride resulted in significantly higher corneal stiffening after CXL. AGE inhibitors significantly diminished cross-linking as detected by both tensile strength measurements using whole corneas and gel electrophoresis of in vitro cross-linking of type I collagen in solution, in the presence and absence of the inhibitors. Rifampicin inhibited CXL more significantly than aminoguanidine in gel electrophoresis and tensile strength tests, confirming recent findings on its efficacy as an AGE inhibitor.Data presented here suggest that CXL is carbonyl dependent and involves the formation of AGE cross-links. Six possible cross-linking mechanisms are discussed." @default.
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- W2123707760 date "2011-08-11" @default.
- W2123707760 modified "2023-09-27" @default.
- W2123707760 title "The Role of Nonenzymatic Glycation and Carbonyls in Collagen Cross-Linking for the Treatment of Keratoconus" @default.
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- W2123707760 doi "https://doi.org/10.1167/iovs.11-7585" @default.
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