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Detection of Genetic Alterations in Hereditary Colorectal Cancer Screening
source: Mutation research
year: 2010
authors: Pineda M, González S, Lázaro C, Blanco I, Capellá G
summary/abstract:There are two major hereditary colorectal cancer syndromes: Adenomatous Polyposis, secondary to APC germline alterations (FAP, Familial Adenomatous Polyposis) or secondary to MUTYH germline alterations (MAP, MUTYH associated Polyposis), and Lynch syndrome, associated with germline mutations in mismatch repair genes (MLH1, MSH2, MSH6 and PMS2). The elucidation of their genetic basis has depicted an increasingly complex picture that has lead to the implementation of complex diagnostic algorithms that include both tumor profiling and germline analyses. A variety of techniques at the DNA, RNA and protein level are used to screen for molecular alterations both in tumor biopsies (microsatellite instability analysis, mismatch repair protein immunohistochemistry, BRAF-Val600Glu detection and MLH1 promoter hypermethylation analysis) and in the germline (point mutation screening, copy number assessment). Also functional tests are more often used to characterize variants of unknown significance. Methodological issues associated with the techniques analyzed, as well as the algorithms used, are discussed.
organization: Av. Gran Via de l'HospitaletDOI: 10.1016/j.mrfmmm.2009.11.002
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