title: Aberrant expression of CD133 protein correlates with Ki-67 expression and is a prognostic marker in gastric adenocarcinoma.
abstract: BACKGROUND
  The relationships between the expression of CD133, Ki-67 and prognosis in gastric adenocarcinoma are unknown and needs exploring.
  
  
  METHODS
  The samples of gastric adenocarcinoma from 336 Chinese patients with follow-up were analyzed for CD133 and Ki-67 protein expressions by immunohistochemical method.
  
  
  RESULTS
  CD133 was expressed in up to 57.4% (193/336) of this group of gastric carcinoma. The expression of CD133 was significantly higher in carcinoma than in normal (P = 0.0001) and dysplastic mucosas (P = 0.004). CD133 was positive corresponded with the tumour size, grade, infiltrative depth and clinical stage (all P < 0.05). The overall mean survival time of the patients with CD133 positive expression was shorter than that of patients with negative expression (P = 0.0001). The expression of CD133 has a positive correlation with that of Ki-67 (r = 0.188, P = 0.001) in gastric adenocarcinoma. CD133 was an independent prognostic indicator. (P = 0.0001).
  
  
  CONCLUSIONS
  It is suggested that CD133 may play an important role in the evolution of gastric adenocarcinoma and should be considered as a potential marker for the prognosis.
authors.affiliation: Department of Pathology, Chinese People's Liberation Army General Hospital, Beijing 100853, China. zhaopo@301hospital.com.cn
authors.forename: Po
authors.initials: P
authors.lastname: Zhao
authors.forename: Yazhuo
authors.initials: Y
authors.lastname: Li
authors.forename: Yali
authors.initials: Y
authors.lastname: Lu
mesh_terms: D000071916:AC133 Antigen; D000230:Adenocarcinoma / Q000208:ethnology / Q000276:immunology* / Q000401:mortality / Q000473:pathology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015703:Antigens, CD / Q000032:analysis*; D044466:Asian People; D014408:Biomarkers, Tumor / Q000032:analysis*; D002681:China; D005260:Female; D005753:Gastric Mucosa / Q000276:immunology / Q000473:pathology; D006023:Glycoproteins / Q000032:analysis*; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D019394:Ki-67 Antigen / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010455:Peptides / Q000032:analysis*; D011237:Predictive Value of Tests; D011379:Prognosis; D016016:Proportional Hazards Models; D018570:Risk Assessment; D013274:Stomach Neoplasms / Q000208:ethnology / Q000276:immunology* / Q000401:mortality / Q000473:pathology; D013997:Time Factors; D015854:Up-Regulation; D055815:Young Adult
chemical_list: D000071916:AC133 Antigen; D015703:Antigens, CD; D014408:Biomarkers, Tumor; D006023:Glycoproteins; D019394:Ki-67 Antigen; C000606023:PROM1 protein, human; D010455:Peptides