Home FOR AUTHORS Neoplasma 2008 Neoplasma Vol.55, No.6, p.463-471, 2008

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Founded: 1954
ISSN 0028-2685
ISSN 1338-4317 (online)

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Neoplasma Vol.55, No.6, p.463-471, 2008

Title: Novel approaches in evaluation of pathogenicity of single-base exonic germline changes involving the mismatch repair genes MLH1 and MSH2 in diagnostics of Lynch syndrome
Author: M. GERYKOVA-BUJALKOVA, T. KRIVULCIK, Z. BARTOSOVA

Abstract: Germline defects in the DNA mismatch repair genes MLH1 and MSH2 are the major cause of hereditary nonpolyposis colon cancer (HNPCC), also called Lynch syndrome. Detection of inherited pathogenic change in their DNA sequence in HNPCC families allows for identification of asymptomatic individuals who require appropriate medical surveillance. However, evaluation of clinical significance of identified DNA alteration is not always straight-forward and some changes maybe classified incorrectly depending on the method used. The aim of this review is to summarize rationale, practice and pitfalls in the characterization of substitutions localized in the exons and outline new experimental and in silico approaches used to determine mutation consequence. Our survey of variants identified in MLH1 and MSH2 genes which were confirmed to cause splicing defect but often appear characterized as missense, nonsense or silent mutations in various databases and publications as well as a list of true missense mutations may serve as a valuable aid for laboratories providing HNPCC diagnosis.

Keywords: MLH1, MSH2, HNPCC, MMR, mutation analysis, in silico assays
Year: 2008, Volume: 55, Issue: 6 Page From: 463, Page To: 471



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