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J Med Genet. 2007 Apr;44(4):225-32. Epub 2006 Dec 15.

X-linked retinoschisis: an update.

Author information

1
Academic Unit of Medical Genetics, University of Manchester, St Mary's Hospital, Manchester, UK.

Abstract

X-linked retinoschisis is the leading cause of macular degeneration in males and leads to splitting within the inner retinal layers leading to visual deterioration. Many missense and protein truncating mutations have now been identified in the causative retinoschisis gene (RS1) which encodes a 224 amino acid secretory retinal protein, retinoschisin. Retinoschisin octamerisation is implicated in cell-cell interactions and cell adhesion perhaps by interacting with beta2 laminin. Mutations cause loss of retinoschisin function by one of the three mechanisms: by interfering with protein secretion, by preventing its octamerisation or by reducing function in the secreted octamerised protein. The development of retinoschisis mouse models have provided a model system that closely resembles the human disease. Recent reports of RS1 gene transfer to these models and the sustained restoration of some retinal function and morphology suggest gene replacement may be a possible future therapy for patients.

PMID:
17172462
PMCID:
PMC2598044
DOI:
10.1136/jmg.2006.047340
[Indexed for MEDLINE]
Free PMC Article

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