Myocilin mutations in black South Africans with POAG.

Published online

Journal Article

PURPOSE: Myocilin (MYOC) mutations are associated with primary open-angle glaucoma (POAG) in multiple populations. Here we examined the role of MYOC mutations in a black South African population with primary open-angle glaucoma (POAG). METHODS: Unrelated black South African subjects with POAG and unaffected controls were recruited from the St. John Eye Hospital (Soweto, Johannesburg, South Africa) and East London Hospital Complex (Eastern Cape, South Africa). A complete eye examination including visual field assessment was performed in all subjects. Blood samples were obtained for DNA extraction. The complete coding region of MYOC was sequenced using the PCR-based Sanger method. Identified mutations were compared to known MYOC mutations. RESULTS: One hundred-thirteen POAG cases and 131 controls were recruited for analysis. A total of 19 variants were observed. Probable glaucoma-causing mutations were observed in 4.4% of POAG cases. A previously reported glaucoma-causing mutation, Tyr453MetfsX11, was observed in three cases and one control. Two other sequence variants, Gly374Val and Lys500Arg, occurred only in cases. Other sequence variants, including 6 novel variants, occurred in at least one control. CONCLUSIONS: A small minority of black South Africans with POAG carry MYOC mutations. The Gly374Val mutation might represent a novel glaucoma-causing mutation. The Tyr453MetFSX11 mutation appears to be a glaucoma-causing mutation with incomplete penetrance.

Full Text

Duke Authors

Cited Authors

  • Whigham, BT; Williams, SEI; Liu, Y; Rautenbach, RM; Carmichael, TR; Wheeler, J; Ziskind, A; Qin, X; Schmidt, S; Ramsay, M; Hauser, MA; Allingham, RR

Published Date

  • April 27, 2011

Published In

Volume / Issue

  • 17 /

Start / End Page

  • 1064 - 1069

PubMed ID

  • 21552496

Electronic International Standard Serial Number (EISSN)

  • 1090-0535

Language

  • eng

Conference Location

  • United States