title: [Expression of ERCC1 mRNA and its impact on the prognosis of patients with non-small cell lung cancer].
abstract: OBJECTIVE
  To investigate the level of ERCC1 mRNA expression in non-small cell lung cancer and analyze the influencing factors of the survival of patients after operation.
  
  
  METHODS
  The level of ERCC1 mRNA expression was quantified in sixty pairs of non-small cell lung cancer tissue and their matched normal lung tissues by real-time PCR assay. The survival of patients was analyzed by univariate Kaplan-Meier and Cox regression analysis.
  
  
  RESULTS
  The level of ERCC1 mRNA expression in cancer tissues (-7.85 ± 3.86) was significantly higher than that in matched normal ones (-11.19 ± 5.03;t = 3.973, P = 0.000). Up-regulation of ERCC1 mRNA was found in 43 of 60 (71.7%) lung cancer tissues compared with that in the matched normal lung tissues (17 of 60, 28.3%). The univariate survival analysis by Kaplan-Meier method showed that the survival rate of patients with high ERCC1 mRNA expression was lower than that in the patients with low expression of ERCC1 mRNA (P = 0.000). Patients with lymph node metastasis, smoking, cancer family history, or high pathological grade had significantly shorter survaival time than those without lymph node metastasis, smoking, cancer family history, or with low pathological grade. Cox regression survival analysis showed that the level of ERCC1 mRNA expression, lymph node metastasis, smoking, and pathological grade were significant independent factors affecting the survival rate.
  
  
  CONCLUSIONS
  Non-small cell lung cancer patients with up-regulated ERCC1 expression have a poor survival. The expression of ERCC1 mRNA, lymph node metastasis, pathological grade, cancer family history and smoking can be used as prognostic indicator of non-small cell lung cancer.
authors.affiliation: Department of Oncology, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Ma
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: Ming
authors.initials: M
authors.lastname: Gao
authors.forename: Xiang-nan
authors.initials: XN
authors.lastname: Li
mesh_terms: D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics / Q000378:metabolism* / Q000473:pathology / Q000601:surgery; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D004720:Endonucleases / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology / Q000601:surgery; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D060787:Neoplasm Grading; D016016:Proportional Hazards Models; D012333:RNA, Messenger / Q000378:metabolism; D012907:Smoking / Q000009:adverse effects; D015996:Survival Rate; D015854:Up-Regulation
chemical_list: D004268:DNA-Binding Proteins; D012333:RNA, Messenger; C071447:ERCC1 protein, human; D004720:Endonucleases