Journal Article

High resolution deletion analysis of constitutional DNA from neurofibromatosis type 2 (NF2) patients using microarray-CGH

Carl E.G. Bruder, Carina Hirvelä, Isabel Tapia-Paez, Ingegerd Fransson, Richard Segraves, Greg Hamilton, Xiao Xiao Zhang, D. Gareth Evans, Andrew J. Wallace, Michael E. Baser, Jessica Zucman-Rossi, Martin Hergersberg, Eugene Boltshauser, Laura Papi, Guy A. Rouleau, George Poptodorov, Albena Jordanova, Helge Rask-Andersen, Lan Kluwe, Victor Mautner, Markku Sainio, Gene Hung, Tiit Mathiesen, Claes Möller, Stefan M. Pulst, Henrik Harder, Arvid Heiberg, Mariko Honda, Michihito Niimura, Sigrid Sahlén, Elisabeth Blennow, Donna G. Albertson, Daniel Pinkel and Jan P. Dumanski

in Human Molecular Genetics

Volume 10, issue 3, pages 271-282
Published in print February 2001 | ISSN: 0964-6906
Published online February 2001 | e-ISSN: 1460-2083 | DOI: http://dx.doi.org/10.1093/hmg/10.3.271
High resolution deletion analysis of constitutional DNA from neurofibromatosis type 2 (NF2) patients using microarray-CGH

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Neurofibromatosis type 2 (NF2) is an autosomal dominant disorder whose hallmark is bilateral vestibular schwannoma. It displays a pronounced clinical heterogeneity with mild to severe forms. The NF2 tumor suppressor (merlin/schwannomin) has been cloned and extensively analyzed for mutations in patients with different clinical variants of the disease. Correlation between the type of the NF2 gene mutation and the patient phenotype has been suggested to exist. However, several independent studies have shown that a fraction of NF2 patients with various phenotypes have constitutional deletions that partly or entirely remove one copy of the NF2 gene. The purpose of this study was to examine a 7 Mb interval in the vicinity of the NF2 gene in a large series of NF2 patients in order to determine the frequency and extent of deletions. A total of 116 NF2 patients were analyzed using high-resolution array-comparative genomic hybridization (CGH) on an array covering at least 90% of this region of 22q around the NF2 locus. Deletions, which remove one copy of the entire gene or are predicted to truncate the schwannomin protein, were detected in 8 severe, 10 moderate and 6 mild patients. This result does not support the correlation between the type of mutation affecting the NF2 gene and the disease phenotype. This work also demonstrates the general usefulness of the array-CGH methodology for rapid and comprehensive detection of small (down to 40 kb) heterozygous and/or homozygous deletions occurring in constitutional or tumor-derived DNA.

Journal Article.  7514 words.  Illustrated.

Subjects: Genetics and Genomics

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