RPE65 gene: multiplex PCR and mutation screening in patients from India with retinal degenerative diseases

We used multiplex PCR follwed by sequencing to screen for mutations in the 14 exons of the RPE65 gene in early-childhood-onset autosomal recessive retinitis pigmentosa (arRP) and Leber's congenital amaurosis (LCA) patients. The RPE65 protein is believed to play an important role in the metaboli...

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Bibliographic Details
Published in:Journal of genetics 2002-04, Vol.81 (1), p.19-23
Main Authors: Joseph, Biju, Srinivasan, Anuradha, Soumittra, Nagasamy, Vidhya, Authiappan, Shetty, Nitin Sridhara, Uthra, Satagopan, Kumaramanickavel, Govindasamy
Format: Article
Language:English
Subjects:
Carrier Proteins
cis-trans-Isomerases
DNA Mutational Analysis
Eye diseases
Eye Proteins
Female
Genetic Testing
Genetics
Humans
India
Male
Mutation
Optic Atrophy, Hereditary, Leber - genetics
Pedigree
Polymerase Chain Reaction
Proteins - genetics
Retinitis Pigmentosa - genetics
Vitamin A
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Summary:We used multiplex PCR follwed by sequencing to screen for mutations in the 14 exons of the RPE65 gene in early-childhood-onset autosomal recessive retinitis pigmentosa (arRP) and Leber's congenital amaurosis (LCA) patients. The RPE65 protein is believed to play an important role in the metabolism of vitamin A in the visual cycle and mutations identified in the gene could have implications for vitamin A-based therapeutic intervention. We were able to identify a homozygous mutation (AAT --> AAG) in exon 9 in an arRP patient and a heterozygous missense transversion (AAT --> AAG) also in exon 9 of an LCA patient. We also identified a polymorphism in exon 10 (GAG --> GAA) in an arRP as well as an LCA patient. Mutation screening would be greatly facilitated by multiplex PCR which could cut down costs, labour and time involved. The nucleotide changes observed in this study could be de novo. Though a larger study has been undertaken, from the preliminary results it appears that in India the RPE65 gene seems to be less involved in causation of LCA.
ISSN:0022-1333
0973-7731
DOI:10.1007/BF02715866