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Abstract #47503 Published in IGR 13-4
Homozygous mutations in PXDN cause congenital cataract, corneal opacity, and developmental glaucoma
Khan K; Rudkin A; Parry DA; Burdon KP; McKibbin M; Logan CV; Abdelhamed ZIA; Muecke JS; Fernandez-Fuentes N; Laurie KJAmerican Journal of Human Genetics 2011; 89: 464-473
Anterior segment dysgenesis describes a group of heterogeneous developmental disorders that affect the anterior chamber of the eye and are associated with an increased risk of glaucoma. Here, we report homozygous mutations in peroxidasin (PXDN) in two consanguineous Pakistani families with congenital cataract-microcornea with mild to moderate corneal opacity and in a consanguineous Cambodian family with developmental glaucoma and severe corneal opacification. These results highlight the diverse ocular phenotypes caused by PXDN mutations, which are likely due to differences in genetic background and environmental factors. Peroxidasin is an extracellular matrix-associated protein with peroxidase catalytic activity, and we confirmed localization of the protein to the cornea and lens epithelial layers. Our findings imply that peroxidasin is essential for normal development of the anterior chamber of the eye, where it may have a structural role in supporting cornea and lens architecture as well as an enzymatic role as an antioxidant enzyme in protecting the lens, trabecular meshwork, and cornea against oxidative damage. (copyright) 2011 The American Society of Human Genetics.
J.E. Craig. Department of Ophthalmology, Flinders University, Flinders Medical Centre, Adelaide, SA 5042, Australia. Email: jamie.craig@flinders.edu.au
Classification:
9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (Part of: 9 Clinical forms of glaucomas > 9.1 Developmental glaucomas)
3.4.2 Gene studies (Part of: 3 Laboratory methods > 3.4 Molecular genetics)
3.6 Cellular biology (Part of: 3 Laboratory methods)
