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Two specific mutations are prevalent causes of recessive retinitis pigmentosa in North American patients of Jewish ancestry

Venturini, Giulia and Koskiniemi-Kuendig, Hanna and Harper, Shyana and Berson, Eliot L. and Rivolta, Carlo. (2015) Two specific mutations are prevalent causes of recessive retinitis pigmentosa in North American patients of Jewish ancestry. Genetics in medicine, 17 (4). pp. 285-290.

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Abstract

Retinitis pigmentosa is a Mendelian disease with a very elevated genetic heterogeneity. Most mutations are responsible for less than 1% of cases, making molecular diagnosis a multigene screening procedure. In this study, we assessed whether direct testing of specific alleles could be a valuable screening approach in cases characterized by prevalent founder mutations.; We screened 275 North American patients with recessive/isolate retinitis pigmentosa for two mutations: an Alu insertion in the MAK gene and the p.Lys42Glu missense in the DHDDS gene. All patients were unrelated; 35 reported Jewish ancestry and the remainder reported mixed ethnicity.; We identified the MAK and DHDDS mutations homozygously in only 2.1% and 0.8%, respectively, of patients of mixed ethnicity, but in 25.7% and 8.6%, respectively, of cases reporting Jewish ancestry. Haplotype analyses revealed that inheritance of the MAK mutation was attributable to a founder effect.; In contrast to most mutations associated with retinitis pigmentosa-which are, in general, extremely rare-the two alleles investigated here cause disease in approximately one-third of North American patients reporting Jewish ancestry. Therefore, their screening constitutes an alternative procedure to large-scale tests for patients belonging to this ethnic group, especially in time-sensitive situations.
Faculties and Departments:03 Faculty of Medicine
09 Associated Institutions > Institute of Molecular and Clinical Ophthalmology Basel (IOB)
09 Associated Institutions > Institute of Molecular and Clinical Ophthalmology Basel (IOB) > Research Group Rivolta IOB
UniBasel Contributors:Rivolta, Carlo
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer Nature
ISSN:1098-3600
e-ISSN:1530-0366
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
edoc DOI:
Last Modified:05 Mar 2021 13:47
Deposited On:05 Mar 2021 13:47

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