Novel mutation of IL1RAPL1 gene in a nonspecific X-linked mental retardation (MRX) family
Mental retardation (MR) affects approximately 2% of the population. About 10% of all MR cases result from defects of X‐linked genes. Mutations in most of more than 20 known genes causing nonspecific form of X‐linked MR (MRX) are very rare and may account for less than 0.5–1% of MR. Linkage studies i...
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Published in | American journal of medical genetics. Part A Vol. 146A; no. 24; pp. 3167 - 3172 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
15.12.2008
Wiley-Liss Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Mental retardation (MR) affects approximately 2% of the population. About 10% of all MR cases result from defects of X‐linked genes. Mutations in most of more than 20 known genes causing nonspecific form of X‐linked MR (MRX) are very rare and may account for less than 0.5–1% of MR. Linkage studies in extended pedigrees followed by mutational analysis of known MRX genes in the linked interval are often the only way to identify a genetic cause of the disorder. We performed linkage analysis in several MRX families, and in one family with four males with MR we mapped the disease to an interval encompassing Xp21.2–22.11 (with a maximum LOD score of 2.71). Subsequent mutation analysis of genes located in this interval allowed us to identify a partial deletion of the IL1RAPL1 gene. Different nonoverlapping deletions involving IL1RAPL1 have been reported previously, suggesting that this region could be deletion‐prone. In this report, we present the results of the molecular analyses and clinical examinations of four affected family members with the deletion in IL1RAPL1. Our data further confirm the importance and usefulness of linkage studies for gene mapping in MRX families and demonstrate that IL1RAPL1 plays an important role in the etiology of MRX. With the development of new methods (aCGH, MLPA), further rearrangements in this gene (including deletions and duplications) might be discovered in the nearest future. © 2008 Wiley‐Liss, Inc. |
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Bibliography: | How to cite this article: Nawara M, Klapecki J, Borg K, Jurek M, Moreno S, Tryfon J, Bal J, Chelly J, Mazurczak T. 2008. Novel mutation of IL1RAPL1 gene in a nonspecific X-linked mental retardation (MRX) family. Am J Med Genet Part A 146A:3167-3172. Polish Ministry of Education and Science - No. PBZ KBN-042/PO5/05; No. PBZ KBN-122/PO5/2004/01-9; No. 2P05A 128 28 istex:A1C82B0364226EB01A932B6D6A8FC060BF30DB1F ArticleID:AJMG32613 ark:/67375/WNG-24WLCN07-D How to cite this article: Nawara M, Klapecki J, Borg K, Jurek M, Moreno S, Tryfon J, Bal J, Chelly J, Mazurczak T. 2008. Novel mutation of gene in a nonspecific X‐linked mental retardation (MRX) family. Am J Med Genet Part A 146A:3167–3172. IL1RAPL1 ObjectType-Case Study-2 SourceType-Scholarly Journals-1 ObjectType-Feature-4 content type line 23 ObjectType-Report-1 ObjectType-Article-3 |
ISSN: | 1552-4825 1552-4833 |
DOI: | 10.1002/ajmg.a.32613 |