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| Título: | A New Locus for Autosomal Recessive RP (RP29) Mapping to Chromosome 4q32-q34 in a Pakistani Family |
Autor: | Hameed, Abdul; Bhattacharya, Shom Shanker CSIC ORCID | Fecha de publicación: | jun-2001 | Editor: | Association for Research in Vision and Ophthalmology | Citación: | Investigative Ophthalmology & Visual Sciene 42(7): 1436-1438 (2001) | Resumen: | [Purpose]: To map the disease locus in a six-generation, consanguineous Pakistani family with autosomal recessive retinitis pigmentosa (arRP). All affected individuals had pigmentary retinopathy associated with symptoms of night blindness and the loss of peripheral visual fields by the age of 20 years, loss of central vision between the ages of 25 and 30 years, and complete blindness between the ages of 40 and 50 years. [Methods]: Genomic DNA from family members was typed for alleles at known polymorphic genetic markers using polymerase chain reaction. Alleles were assigned to individuals, which allowed calculation of LOD scores using the programs Cyrillic (http://www.cyrillicsoftware.com) and MLINK (Cherwell Scientific Publishing Ltd., Oxford, UK). The genes for membrane glycoprotein (M6a) and chloride channel 3 (CLCN3) were analyzed by direct sequencing for mutations. [Results]: A new locus for arRP (RP29) has been mapped to chromosome 4q32-q34. A maximum two-point LOD score of 3.76 was obtained for the marker D4S415, with no recombination. Two recombination events in the pedigree positioned this locus to a region flanked by markers D4S621 and D4S2417. A putative region of homozygosity by descent was observed between the loci D4S3035 and D4S2417, giving a probable disease interval of 4.6 cM. Mutation screening of two candidate genes, M6a and CLCN3, revealed no disease-associated mutations. [Conclusions]: The results suggest that the arRP phenotype maps to a new locus and is due to a mutated gene within the 4q32-q34 chromosomal region. | Descripción: | 3 páginas, 1 figura, 1 tabla.-- et al. | Versión del editor: | http://www.iovs.org/content/42/7/1436.full | URI: | http://hdl.handle.net/10261/40415 | ISSN: | 0146-0404 | E-ISSN: | 1552-5783 |
| Aparece en las colecciones: | (CABIMER) Artículos |
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| ARTICULOS315435[1].pdf | 152,09 kB | Adobe PDF |  Visualizar/Abrir |
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