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- W2000268209 abstract "Somatic mutations of the epidermal growth factor receptor (EGFR) gene were found in about 25-40% of Japanese lung cancer patients. These mutations are associated with clinical and radiographic responses to EGFR tyrosine kinase inhibitors. Most common mutation are arginine for leucine substitution at amino acid 858 (L858R) and exon 19 deletions, especially deletion type 1 mutation. We investigated these EGFR mutation statuses in 575 surgically treated non-small cell lung cancer (NSCLC) cases. Three-hundred and sixty-two adenocarcinoma cases were included. The presence or absence of EGFR mutations of kinase domains was analyzed by genotyping analysis (TaqMan assay; n=386, and LightCycler assay; n=98) and sequences (n=91). EGFR mutations (CTG; CGG; L858R) were found from 63 of 575 lung cancer patients. We also detected the deletion 1a type mutations (2235-2249 del GGAATTAAGAGAAGC) from 39 patients and deletion 1b type mutations (2236-2250 del GAATTAAGAGAAGCA) from 15 patients in exon 19. These mutation statuses were significantly correlated with gender, smoking status (never smoker versus smoker), and pathological subtypes (adenocarcinoma versus non-adenocarcinoma). L858R mutation (p<0.0001), but not deletion 1 type mutation (p=0.0665), was correlated with differentiation status (well versus moderately or poorly) of lung cancers. L858R mutation ratio was significantly higher in non-smoker (p=0.0496) and adenocaicinoma (p=0.0136) when compared to deletion 1 type mutations. The EGFR mutation status, especially L858R mutation might be correlated with the clinico-pathological features related to good response to gefitinib, such as gender, smoking history, and pathological subtypes of Japanese lung cancers." @default.
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- W2000268209 date "2006-10-01" @default.
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- W2000268209 title "L858R EGFR mutation status correlated with clinico-pathological features of Japanese lung cancer" @default.
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- W2000268209 doi "https://doi.org/10.1016/j.lungcan.2006.06.003" @default.
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