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Mutation Detection in K‐ras, BRCA1, BRCA2, and p53 Using PCR/LDR and a Universal DNA Microarray

Abstract: We have developed a multiplex PCR/ligase detection reaction (PCR/LDR) that combines high sensitivity with the ability to simultaneously detect hundreds of mutations in a single‐tube reaction. To enable us to rapidly assay large numbers of samples, we have linked this mutation detection scheme with analysis on a Universal DNA microarray. We have successfully applied this approach to characterize K‐ras and p53 mutations in DNA derived from undissected colon tumors. The sensitivity of the assay has also facilitated detection of low‐frequency mutations in BRCA1 and BRCA2 in pooled samples of DNA; thus, PCR/LDR can rapidly screen large numbers of DNA samples required for population studies.