title: p53 immunoreaction in endoscopic biopsy specimens of colorectal cancer, and its prognostic significance.
abstract: The expression of p53 protein was immunohistochemically studied in formalin-fixed paraffin-embedded biopsy specimens of 203 colorectal carcinomas by use of a monoclonal antibody specific for the p53 protein. PAb1801. p53 protein expression with its reactivity localised in nuclei was found in 121 (59.6%) of the cancers. There was no correlation of p53 immunoreactivity with histological classification, wall invasion, lymphatic invasion, venous invasion, lymph node metastases, or peritoneal metastases. p53-positive cancers were more frequently associated with liver metastasis than p53-negative ones. Patients with p53-positive tumours had significantly poorer prognoses than those with p53-negative tumours. The 5 year survival rate was 58.1% for patients with p53-positive tumours, and 76.3% for those with p53-negative tumours. In Dukes' stage C tumours, an especially good correlation was found between p53 immunoreactivity and prognosis. In addition, patients with p53-positive tumours had higher recurrence rates. The results indicate that p53 immunoreactivity may be a useful prognostic marker of colorectal cancers.
authors.affiliation: First Department of Surgery, Fukui Medical School, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Yamaguchi
authors.forename: G
authors.initials: G
authors.lastname: Nakagawara
authors.forename: Y
authors.initials: Y
authors.lastname: Kurosaka
authors.forename: G
authors.initials: G
authors.lastname: Nishimura
authors.forename: Y
authors.initials: Y
authors.lastname: Yonemura
authors.forename: I
authors.initials: I
authors.lastname: Miyazaki
mesh_terms: D000911:Antibodies, Monoclonal; D001706:Biopsy; D003110:Colonic Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D003113:Colonoscopy; D005500:Follow-Up Studies; D006801:Humans; D008113:Liver Neoplasms / Q000556:secondary; D008207:Lymphatic Metastasis; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D011379:Prognosis; D012004:Rectal Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D016019:Survival Analysis; D013997:Time Factors; D016159:Tumor Suppressor Protein p53 / Q000032:analysis*
chemical_list: D000911:Antibodies, Monoclonal; D016159:Tumor Suppressor Protein p53