Is pseudoexfoliation syndrome inherited? A review of genetic and nongenetic factors and a new observation.

Published

Journal Article (Review)

Pseudoexfoliation (PEX) syndrome is the commonest identifiable cause of open-angle glaucoma worldwide. PEX is characterized clinically by small whitish deposits of fibrillar-granular material in the anterior segment of the eye. Despite its prevalence and potential for ophthalmic morbidity, surprisingly little is known about the etiology and pathogenesis of PEX. This article reviews the literature and presents evidence regarding genetic and nongenetic arguments for the etiology of pseudoexfoliation. Lines of evidence that support a genetic basis for PEX include transmission in two-generation families, twin studies, an increased risk of PEX in relatives of affected patients, and HLA studies. Nearly all pedigrees in the literature, and our own experience with PEX families in Iceland and Canada, suggest maternal transmission, raising the possibilities of mitochondrial inheritance, X-linked inheritance, and autosomal inheritance with genomic imprinting. A number of nongenetic factors have also been evaluated for their possible implication in the development of PEX. These include ultraviolet light, autoimmunity, slow virus infection, and trauma. It is possible that a combination of genetic and nongenetic factors may be involved in the etiology and pathogenesis of PEX, i.e. it may be a multifactorial disorder. Further studies with larger numbers of patients are needed to delineate more clearly the contribution of genetic (nuclear DNA, mitochondrial DNA or both) and nongenetic factors to the development of pseudoexfoliation syndrome and pseudoexfoliation glaucoma.

Full Text

Cited Authors

  • Damji, KF; Bains, HS; Stefansson, E; Loftsdottir, M; Sverrisson, T; Thorgeirsson, E; Jonasson, F; Gottfredsdottir, M; Allingham, RR

Published Date

  • December 1998

Published In

Volume / Issue

  • 19 / 4

Start / End Page

  • 175 - 185

PubMed ID

  • 9895242

Pubmed Central ID

  • 9895242

International Standard Serial Number (ISSN)

  • 1381-6810

Language

  • eng

Conference Location

  • England