title: [Relationship of the expression of cyclin D1 and P21WAF1 with the sensitivity to chemotherapeutic drugs on gastric cancers].
abstract: OBJECTIVE
  To investigate the relationship between the sensitivity to chemotherapeutic drugs and the expression of cyclin D1 and P21WAF1 in gastric carcinoma.
  
  
  METHODS
  The sensitivity of 80 samples of gastric cancer cells to HCPT, CDDP, 5-FU, ADM and MMC was evaluated with MTT assay. The protein expression of cyclin D1 and P21WAF1 was detected by immunohistochemistry.
  
  
  RESULTS
  The sensitivity of gastric carcinoma cells to chemotherapeutic drugs was different. Inhibitory rates of tumor cells exposed to 5-FU, MMC and DDP were significantly higher than those exposed to ADM and HCPT (P <0.05). Positive expression rates of cyclin D1 and P21WAF1 in gastric cancer were 70.0% and 47.5% respectively. Cyclin D1 positive cells showed more sensitive to 5-FU and HCPT than cyclin D1 negative cells. P21WAF1 negative cells showed more sensitive to MMC, 5-FU and DDP than P21WAF1 positive cells.
  
  
  CONCLUSIONS
  Expression of cyclin D1 and P21WAF1 is related with drug-resistance of tumor. Examination of cyclinD1 and P21WAF1 would have reference value in selection of chemotherapeutic drugs.
authors.affiliation: Department of Pathology, General Hospital of Jinan Military Unit, Jinan 250031, China. gm2227@sina.com
authors.forename: Ming
authors.initials: M
authors.lastname: Geng
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.forename: Yong-cheng
authors.initials: YC
authors.lastname: Cao
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.forename: Xiao-hong
authors.initials: XH
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D019938:Cyclin D1 / Q000378:metabolism*; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism*; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000188:drug therapy / Q000378:metabolism*
chemical_list: C493956:CDKN1A protein, human; D050759:Cyclin-Dependent Kinase Inhibitor p21; D019938:Cyclin D1