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N Engl J Med. 1998 Apr 9;338(15):1022-7.

Clinical features associated with mutations in the chromosome 1 open-angle glaucoma gene (GLC1A)

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1
Department of Ophthalmology, University of Iowa, Iowa City 52242, USA.

Abstract

BACKGROUND:

A substantial proportion of cases of glaucoma have a genetic basis. Mutations causing glaucoma have been identified in the chromosome 1 open-angle glaucoma gene (GLC1A), which encodes a 57-kd protein known as myocilin. The normal role of this protein and the mechanism by which mutations cause glaucoma are not known.

METHODS:

We screened 716 patients with primary open-angle glaucoma and 596 control subjects for sequence changes in the GLC1A gene.

RESULTS:

We identified 16 sequence variations that met the criteria for a probable disease-causing mutation because they altered the predicted amino acid sequence and they were found in one or more patients with glaucoma, in less than 1 percent of the control subjects. These 16 mutations were found in 33 patients (4.6 percent). Six of the mutations were found in more than 1 subject (total, 99). Clinical features associated with these six mutations included an age at diagnosis ranging from 8 to 77 years and maximal recorded intraocular pressures ranging from 12 to 77 mm Hg.

CONCLUSIONS:

A variety of mutations in the GLC1A gene are associated with glaucoma. The spectrum of disease can range from juvenile glaucoma to typical late-onset primary open-angle glaucoma.

PMID:
9535666
DOI:
10.1056/NEJM199804093381503
[Indexed for MEDLINE]
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