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A second decorin frame shift mutation in a family with congenital stromal corneal dystrophy
Eyvind Rødahl1, Rita Van Ginderdeuren, Per M Knappskog
1Department of Ophthalmology, Haukeland University Hospital, Bergen, Norway. eyvind.rodahl@helse-bergen.no
Purpose:
To identify the genetic defect in a Belgian family with congenital stromal corneal dystrophy.
Design:
Case report and result of deoxyribonucleic acid (DNA) analyses.
Methods:
DNA sequencing of polymerase chain reaction (PCR) products generated from amplification of exons and adjacent introns of the decorin gene.
Results:
The family consisted of a mother and her son, both suffering from congenital stromal corneal dystrophy. In both individuals, a single base pair deletion (c.941delC) in the coding sequence of the decorin gene was demonstrated, predicting a C-terminal truncation of the decorin protein (p.Pro314fsX14).
Conclusion:
This is the second family with congenital stromal corneal dystrophy of the cornea in which a frame shift mutation in the decorin gene has been detected. Both in this family and in a previously reported Norwegian family, a decorin protein missing the 33 C-terminal amino acids is predicted. This observation strongly supports a role for decorin in the pathogenesis of this disorder.
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