Presence of myocilin sequence variants in Japanese patients with open-angle glaucoma

Ming Ge Mengkegale, Nobuo Fuse, Akiko Miyazawa, Kana Takahashi, Motohiko Seimiya, Tomoki Yasui, Makoto Tamai, Toru Nakazawa, Kohji Nishida

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Purpose: To examine the myocilin (MYOC) gene for mutations in Japanese patients with primary open-angle glaucoma (POAG) and to determine the phenotypes of the patients with the mutations. Methods: One-hundred thirty-eight unrelated Japanese patients with POAG were studied. Genomic DNA was extracted from leukocytes of peripheral blood, and the three coding exons including the intron-exon boundaries were amplified by polymerase chain reaction (PCR) and directly sequenced bi-directionally. Results: Two sequence variants were identified, one novel non-synonymous amino acid change (p.Gln297His) and one reported synonymous amino acid change (p.Ala363Thr). These mutations were not detected in the 118 ethnically-matched controls. p.Gln297His was found in a 70-year-old man, who developed POAG at a late age, and his intraocular pressure was high. p.Ala363Thr was found in two cases, and both patients developed POAG at an early age and had high intraocular pressures that responded poorly to medical treatment. Conclusions: Two non-synonymous variants, p.Gln297His and p.Ala363Thr, indicate that they are involved in the pathogenesis of POAG. p.Ala363Thr has been found in another Japanese population and would be useful in genetic testing.

Original languageEnglish
Pages (from-to)413-417
Number of pages5
JournalMolecular vision
Publication statusPublished - 2008 Mar 4

ASJC Scopus subject areas

  • Ophthalmology


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