title: Clinicopathological significance of p53 and mdm2 protein expression in human pancreatic cancer.
abstract: OBJECTIVE
  To study the clinicopathological significance of p53 and mdm2 protein expression in human pancreatic cancer.
  
  
  METHODS
  To investigate the expression of p53 and mdm2 in pancreatic cancer by immunohistochemistry, and the relationships between the p53 and mdm2 protein expression and clinicopathological parameters in pancreatic cancer.
  
  
  RESULTS
  The positive expression of p53 protein was found in 40 of 59 patients (67.8%) and that of mdm2 protein in 17 of 59 patients (28.8%). No obvious relationships were found between p53 as well as mdm2 expression and sex, tumor site, TNM staging and histological differentiation. p53 expression was increased in patients younger than 65 years old, while mdm2 had no relationship with age. The survival time of the patients with the positive expression of p53 and mdm2 proteins was obviously shorter than the other groups.
  
  
  CONCLUSIONS
  Both p53 and mdm2 presented relatively high expression in human pancreatic cancer. The overexpression of p53 and mdm2 might reflect the malignant proliferation of pancreatic cancer and their co-expression might be helpful to evaluate the prognosis of the patients with pancreatic cancer.
authors.affiliation: Department of Surgery, First Affiliated Hospital, China Medical University, Shenyang 110001, Liaoning Province, China. mingdong76@yahoo.com
authors.forename: Ming
authors.initials: M
authors.lastname: Dong
authors.forename: Gang
authors.initials: G
authors.lastname: Ma
authors.forename: Wei
authors.initials: W
authors.lastname: Tu
authors.forename: Ke-Jian
authors.initials: KJ
authors.lastname: Guo
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Tian
authors.forename: Yu-Ting
authors.initials: YT
authors.lastname: Dong
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009687:Nuclear Proteins / Q000378:metabolism*; D010190:Pancreatic Neoplasms / Q000378:metabolism* / Q000473:pathology*; D011379:Prognosis; D011518:Proto-Oncogene Proteins / Q000378:metabolism*; D051736:Proto-Oncogene Proteins c-mdm2; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D009687:Nuclear Proteins; D011518:Proto-Oncogene Proteins; D016159:Tumor Suppressor Protein p53; C497206:MDM2 protein, human; D051736:Proto-Oncogene Proteins c-mdm2