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Increased cancer risk of heterozygotes with NBS1 germline mutations in poland

✍ Scribed by Jan Steffen; Raymonda Varon; Maria Mosor; Galina Maneva; Martin Maurer; Markus Stumm; Dorota Nowakowska; Maryna Rubach; Ewa Kosakowska; Włodzimierz Ruka; Zbigniew Nowecki; Piotr Rutkowski; Tomasz Demkow; Małgorzata Sadowska; Mariusz Bidziński; Krzysztof Gawrychowski; Karl Sperling

Publisher
John Wiley and Sons
Year
2004
Tongue
French
Weight
78 KB
Volume
111
Category
Article
ISSN
0020-7136

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✦ Synopsis

Abstract

It has been suggested based on familial data that Nijmegen breakage syndrome (NBS) heterozygotes have an increased risk of malignant tumors. We found 15 carriers of the 657del5 mutation and 8 carriers of the R215W molecular variant of the NBS1 gene among 1,289 consecutive patients from Central Poland with various cancers and only 10 and 4 such carriers, respectively, in 1,620 controls from this region. Most of the 657del5 mutation carriers were found among patients with melanoma (4/105), non‐Hodgkin lymphoma (2/42) and breast cancer (4/224) and of the 234 patients with colorectal carcinoma 3 carried the 657del5 mutation and 3 others the R215W molecular variant. The frequencies of 657del5 mutation carriers among patients with melanoma and non‐Hodgkin lymphoma and of R215W carriers in patients with colorectal cancer were significantly higher than in controls (p < 0.01, < 0.05 and < 0.05 respectively). The pooled frequencies of 657del5 and R215W mutations in all cancer patients were also significantly higher than in controls (p < 0.05). Two carriers of the 657del5 mutation had second primary tumors. Malignant tumors among parents and siblings of 657del5 mutation carriers (14/77) were twice more frequent than in population controls. Three carriers of this mutation (2 probands with melanoma) reported melanoma in relatives. These results suggest strongly that NBS1 heterozygosity may be associated with elevated risk of some cancers. Larger studies are needed to evaluate the impact of the high frequency of germline NBS1 mutations on the cancer burden in the Slav populations. © 2004 Wiley‐Liss, Inc.

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