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- W2073924928 abstract "Purpose.: The complement system plays a crucial role in the progression of age-related macular degeneration (AMD). In this study, the authors sought to evaluate the pathophysiologic roles of complement components C3a and C5a in the human choroid in AMD. Methods.: Human RPE/choroid was assayed for the presence of C3a and C5a receptors (C3aR and C5aR) using RT-PCR and immunohistochemistry. Choroidal endothelial cell migration and proliferation were evaluated in the presence of C5a. Organ cultures of human choroid were incubated in C5a or bovine serum albumin (BSA) followed by quantitative immunohistochemistry and quantitative PCR for ICAM-1. AMD patients and controls were genotyped at SNPs in the C5R1 and C3AR1 genes. Results.: C5aR, but not C3aR, was detected in human choroid. C5a did not promote endothelial cell migration or proliferation. However, choriocapillaris endothelial cells in organ culture responded to C5a by increasing ICAM-1 mRNA and protein. No significant association of SNP genotypes was detected in AMD patients at the C3AR1 and C5R1 genes. Conclusions.: The generation of C5a peptides may lead to activation of choriocapillaris endothelial cells in AMD. Activation of the choroidal endothelium may affect the progression of AMD by recruitment of monocytes, leading to additional sequelae of AMD pathogenesis." @default.
- W2073924928 created "2016-06-24" @default.
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- W2073924928 date "2010-10-01" @default.
- W2073924928 modified "2023-10-16" @default.
- W2073924928 title "Complement Component C5a Activates ICAM-1 Expression on Human Choroidal Endothelial Cells" @default.
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- W2073924928 doi "https://doi.org/10.1167/iovs.10-5322" @default.
- W2073924928 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3066598" @default.
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