title: [K-RAS gene mutations in patients with non-small cell lung cancer].
abstract: OBJECTIVE
  Recent studies indicated that Non-small cell lung cancer (NSCLC) patients with mutant K-RAS failed to benefit from adjuvant chemotherapy, and the cancer did not respond to epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs). These findings indicated that K-RAS gene status can be a biomarker to predict the sensitivity of EGFR TKIs. The aim of this study is to analyze K-RAS gene mutations with NSCLC patients in Cancer Center of Sun Yet-sen University.
  
  
  METHODS
  52 fresh frozen tumor tissues were collected and K-RAS genes were amplified by PCR. Then PCR amplification fragments were sequenced and analyzed.
  
  
  RESULTS
  Somatic mutations in the codon 12 of K-RAS gene in tumors were identified from 2 of 52 (3.8%) patients. There were no relationships among K-RAS gene mutations and gender, pathology, smoking, differentiation and stage.
  
  
  CONCLUSIONS
  The frequency of K-RAS gene mutations with NSCLC in our center is very low and is similar to that in Asia patients, and is lower than that in Caucasian population.
authors.affiliation: State Key Laboratory of Oncology in South China, Guangzhou 510060, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhenkui
authors.initials: Z
authors.lastname: Pan
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang
authors.forename: Fei
authors.initials: F
authors.lastname: Xu
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009154:Mutation; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D016283:Proto-Oncogene Proteins p21(ras); D018631:ras Proteins / Q000235:genetics*
chemical_list: C117307:KRAS protein, human; D011518:Proto-Oncogene Proteins; D016283:Proto-Oncogene Proteins p21(ras); D018631:ras Proteins