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- W2093353485 abstract "purpose. Glaucomatous optic neuropathy is characterized by remodeling of the extracellular matrix with disorganization of elastic fibers in the optic nerve head (ONH). There are significant differences in prevalence of glaucomatous optic neuropathy between African Americans (AAs) and Caucasian Americans (CAs). The goal of this study was to evaluate differences in elastin synthesis and maturation in ONH tissue and cells of AA and CA donors with no eye disease, to provide a basis for underlying racial differences in susceptibility to elevated intraocular pressure. methods. The amount of mature elastin in ONHs from each group of donors was evaluated by desmosine radioimmunoassay. The distribution of elastic fibers in ONH tissue was investigated by immunofluorescent staining. Elastin and lysyl oxidase mRNA levels and alternative splicing of elastin in ONH astrocytes were investigated by quantitative PCR. Tropoelastin protein expression was assessed by immunoblot analysis. results. ONHs from AA donors had significantly reduced levels of desmosine compared with those of CAs. In contrast, elastin mRNA and tropoelastin synthesis were elevated in ONH astrocytes from AA individuals. The inclusion of exon 23 in elastin mRNA and lysyl oxidase-like 2 mRNA levels was significantly reduced in astrocytes from AA compared with CA donors. conclusions. A reduced number of cross-linking domains in elastin and decreased lysyl oxidase-like 2 expression leads to decreased amount of mature elastin in ONHs from healthy AA individuals compared with CA donors. These results suggest ELN and LOXL2 as candidate susceptibility genes for population-specific genetic risk of primary open-angle glaucoma (POAG)." @default.
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- W2093353485 date "2007-07-01" @default.
- W2093353485 modified "2023-10-16" @default.
- W2093353485 title "Population Differences in Elastin Maturation in Optic Nerve Head Tissue and Astrocytes" @default.
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- W2093353485 doi "https://doi.org/10.1167/iovs.07-0107" @default.
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