title: A dot-blot screening procedure for mutated ras oncogenes using synthetic oligodeoxynucleotides.
abstract: To analyze human tumors for the presence of mutated ras oncogenes, a procedure was developed based on selective hybridization of mutation-specific oligodeoxynucleotide probes to genomic DNA [Bos et al., Nucl. Acids Res. 12 (1984) 9155-9163]. We have improved this procedure both in sensitivity and speed by including an in vitro amplification step of ras-specific sequences. This amplification step has first been described by Saiki et al. [Science 230 (1985) 1350-1353] and results in a more than 10(4)-fold increase in the sequence which might contain the mutation. Furthermore, we have improved the selectivity of our hybridizations. As a result, mutated ras oncogenes can now be detected with a dot-blot screening procedure requiring less than 1 microgram of tumor DNA.
mesh_terms: D002460:Cell Line; D004273:DNA, Neoplasm / Q000235:genetics; D006801:Humans; D009693:Nucleic Acid Hybridization; D009838:Oligodeoxyribonucleotides / Q000138:chemical synthesis; D009857:Oncogenes; D011519:Proto-Oncogenes
chemical_list: D004273:DNA, Neoplasm; D009838:Oligodeoxyribonucleotides