title: [Expression of ras oncogene p21 product and proliferating cell nuclear antigen in liver cirrhosis and the correlation with liver cell dysplasia].
abstract: OBJECTIVE
  To probe the role of ras oncogene p21 product, proliferating cell nuclear antigen (PCNA) and hepatitis B virus infection in the development of cirrhotic nodules, liver cell dysplasia and hepatocellular carcinoma (HCC).
  
  
  METHODS
  S-P immunohistochemical technique was used to analyze the expression of p21, PCNA and HBsAg was studied in 30 cases of cirrhosis with HCC and 60 cases without HCC and 27 HCC cases.
  
  
  RESULTS
  The positive rates for p21 in cirrhosis with or without HCC, and HCC tissue were 90%, 68.33%, and 62.96%, respectively. The positive rates for p21, PCNA and HBsAg in cirrhotic nodules with LCD were 92.45%, 73.59% and 64.92%, respectively, significantly higher than those without LCD (P<0.05). The incidence of p21 expression in hepatocytes was significantly higher in HBsAg- and PCNA positive cases than in negative ones (P<0.01).
  
  
  CONCLUSIONS
  (1)The overexpression of p21 may play an important role in the early stage of the development of HCC; (2)LCD are precancerous cells which have the ability to initiate neoplastic growth and present a high risk of development of HCC especially combining HBV infection and the overexpression of p21 and PCNA. (3)The expression level of p21 in liver cirrhosis is related to HBV infection and the expression level of PCNA.
authors.affiliation: Department of Pathology, Guangxi Medical University, Nanning 530021, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Feng
authors.forename: R
authors.initials: R
authors.lastname: He
authors.forename: Z
authors.initials: Z
authors.lastname: Lu
authors.forename: Y
authors.initials: Y
authors.lastname: Ling
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D006528:Carcinoma, Hepatocellular / Q000209:etiology*; D005260:Female; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D022781:Hepatocytes / Q000473:pathology*; D006801:Humans; D008103:Liver Cirrhosis / Q000378:metabolism* / Q000473:pathology / Q000821:virology; D008113:Liver Neoplasms / Q000209:etiology* / Q000378:metabolism / Q000473:pathology; D008297:Male; D008875:Middle Aged; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis*; D016283:Proto-Oncogene Proteins p21(ras) / Q000032:analysis*
chemical_list: D006514:Hepatitis B Surface Antigens; D018809:Proliferating Cell Nuclear Antigen; C501009:HRAS protein, human; D016283:Proto-Oncogene Proteins p21(ras)