title: Expression of p21(WAF1/CIP1) and p53 proteins in gastric carcinoma: its relationships with cell proliferation activity and prognosis.
abstract: The expressions of p21(WAF1/CIP1), p53 proteins, and Ki-67 antigen were investigated immunohistochemically in 190 primary gastric carcinomas. Of the 190 tumors, 40.5% positively expressed p21(WAF1/CIP1) and 42.1% positively expressed p53. The expression of p21(WAF1/CIP1) was significantly associated with clinicopathological factors including gender, tumor size, status of lymph node, and clinicopathological stage (P<0.05 for all), but p21(WAF1/CIP1) expression showed no clear correlation with Ki-67 labeling index. The mean Ki-67 labeling index was significantly higher in p53-positive cases than p53-negative cases (P<0.0001). However, among the clinicopathological factors examined, expression of p53 correlated only with age. Univariate and multivariate survival analyses revealed that clinicopathological stage (P<0.001) and expression status of p21(WAF1/CIP1) (P<0.05) were independent prognostic factors. Neither the expression status of p53 nor the Ki-67 labeling index, however, influenced the prognosis of patients with gastric cancer.
authors.affiliation: Department of Pathology, Yamaguchi University School of Medicine, 1-1-1 Minami-Kogushi, Ube-shi, Yamaguchi 755-8505, Japan.
authors.forename: X P
authors.initials: XP
authors.lastname: Liu
authors.forename: K
authors.initials: K
authors.lastname: Tsushimi
authors.forename: M
authors.initials: M
authors.lastname: Tsushimi
authors.forename: S
authors.initials: S
authors.lastname: Kawauchi
authors.forename: A
authors.initials: A
authors.lastname: Oga
authors.forename: T
authors.initials: T
authors.lastname: Furuya
authors.forename: K
authors.initials: K
authors.lastname: Sasaki
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis*; D002455:Cell Division / Q000502:physiology; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins / Q000032:analysis*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000032:analysis; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013274:Stomach Neoplasms / Q000737:chemistry* / Q000175:diagnosis / Q000401:mortality / Q000473:pathology; D016019:Survival Analysis; D016159:Tumor Suppressor Protein p53 / Q000032:analysis*
chemical_list: D014408:Biomarkers, Tumor; C493956:CDKN1A protein, human; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins; D019394:Ki-67 Antigen; D016159:Tumor Suppressor Protein p53