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The PITX3 gene in posterior polar congenital cataract in Australia


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Burdon, KP, McKay, JD, Wirth, MG, Russell-Eggit, IM, Bhatti, S, Ruddle, JB, Dimasi, D, Mackey, DA and Craig, JE 2006 , 'The PITX3 gene in posterior polar congenital cataract in Australia' , Molecular Vision, vol. 12 , pp. 367-371 .

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Purpose: Congenital cataract is a significant cause of blindness worldwide. Many genes are known to cause the disorder. A large multigenerational pedigree was investigated for the genetic cause of a posterior polar autosomal dominant congenital cataract.

Methods: A genome wide scan was conducted in a large multigenerational family with autosomal dominant cataract to identify the linked region of the genome. The PITX3 gene was investigated through direct sequencing and detection of fluorescently labeled PCR products.

Results: Linkage was detected to a region of chromosome 10q23-26 which contains the candidate gene PITX3. A segregating 17 bp insertion mutation was identified. This mutation was not identified in 100 additional unrelated sporadic and familial congenital cataract patients. No mutations of the PITX3 gene were identified in 9 families with posterior polar congenital cataract.

Conclusions: The 657ins17bp duplication of the PITX3 gene is the cause of the cataract phenotype in the large pedigree, however, this gene appears responsible for only a small proportion of congenital cataract in Australia.

Item Type: Article
Authors/Creators:Burdon, KP and McKay, JD and Wirth, MG and Russell-Eggit, IM and Bhatti, S and Ruddle, JB and Dimasi, D and Mackey, DA and Craig, JE
Journal or Publication Title: Molecular Vision
ISSN: 1090-0535
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