Novel MYOC gene mutation, Phe369Leu, in Japanese patients with primary open-angle glaucoma detected by denaturing high-performance liquid chromatography

J Glaucoma. 2004 Dec;13(6):466-71. doi: 10.1097/0.ijg.0000138204.6d.

Abstract

Purpose: To screen for mutations in the MYOC gene in Japanese patients with primary open-angle glaucoma (POAG) using denaturing high-performance liquid chromatography (DHPLC).

Patients and methods: Blood samples were collected from 171 patients with POAG and 100 controls from seven institutions in Japan. For high-throughput analysis, seven exonic regions were amplified by polymerase chain reaction using DNA pooled from three patients; each DNA pool was then analyzed chromatographically. For analysis of a small number of samples, 7 exonic regions were amplified separately but simultaneously with annealing at 58 degrees C in each patient and then chromatographed, using 7 wells of the same 96-well plate per sample. When chromatographic patterns were abnormal by either method, the PCR products of the individual samples were sequenced.

Results: Four glaucoma-causing mutations were identified in five POAG patients (2.9%). One missense mutation, Phe369Leu, is new; and three others, Ile360Asn, Ala363Thr, and Thr448Pro, have been reported in Japanese patients. Phe369Leu was associated with adult onset POAG.

Conclusions: Mutations in the MYOC gene were demonstrated chromatographically in 2.9% of our Japanese POAG patients. The use of pooled DNAs with DHPLC analysis is a time- and labor-saving technique. All mutations detected appear to be specific to Japanese patients.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Amino Acid Sequence
  • Asians / genetics*
  • Base Sequence
  • Chromatography, High Pressure Liquid / methods
  • Cytoskeletal Proteins
  • DNA
  • Eye Proteins / genetics
  • Genetic Testing
  • Glaucoma, Open-Angle / genetics*
  • Glaucoma, Open-Angle / pathology
  • Glaucoma, Open-Angle / physiopathology
  • Glycoproteins / genetics
  • Humans
  • Leucine
  • Middle Aged
  • Mutation, Missense*
  • Optic Disk / pathology
  • Phenylalanine
  • Polymerase Chain Reaction / methods
  • Visual Fields

Substances

  • Cytoskeletal Proteins
  • Eye Proteins
  • Glycoproteins
  • trabecular meshwork-induced glucocorticoid response protein
  • Phenylalanine
  • DNA
  • Leucine