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Abstract #23775 Published in IGR 11-2
A clinical and molecular genetic study of German patients with primary congenital glaucoma
Weisschuh N; Wolf C; Wissinger B; Gramer EAmerican Journal of Ophthalmology 2009; 147: 744-753
PURPOSE: To estimate an accurate incidence rate for CYP1B1 mutations in German patients with primary congenital glaucoma (PCG). DESIGN: Observational case series. METHODS: Blood was obtained from 39 unrelated patients of German origin with clear clinical features of PCG and screened for mutations in the CYP1B1 gene using direct deoxyribonucleic acid sequencing. One hundred ethnically matched control subjects were screened for novel sequence variants using restriction fragment length polymorphism and denaturing high-performance liquid chromatography. RESULTS: Sequence analysis identified 11 different mutations in 7 patients (18%). Four patients were compound heterozygotes, 2 subjects heterozygous, and 1 homozygous for CYP1B1 mutations. One deletion (c.199_206del8) and 3 missense mutations (L177P, F190L, and S282N) were novel. None of the novel missense mutations identified was found in normal controls. CONCLUSIONS: Our results indicate that only a minor proportion of German PCG patients harbor mutations in the CYP1B1 gene and are in line with similar studies from other ethnic populations in which the rate of consanguinity is low. In addition, this is the first report discussing the phenotypes of German PCG patients with and without CYP1B1 mutations.
Centre for Ophthalmology, Institute for Ophthalmic Research, Molecular Genetics Laboratory, Tuebingen, Germany. nicole.weisschuh@uni-tuebingen.de
Classification:
9.1.1 Congenital glaucoma, Buphthalmos (Part of: 9 Clinical forms of glaucomas > 9.1 Developmental glaucomas)
3.5 Molecular biology incl. SiRNA (Part of: 3 Laboratory methods)
3.4.2 Gene studies (Part of: 3 Laboratory methods > 3.4 Molecular genetics)