title: Association between cyclo-oxygenase-2 overexpression and missense p53 mutations in gastric cancer.
abstract: Wild-type p53 competitively binds to the promoter region of COX-2 in vitro and inhibits its transcription. We examined the association between p53 mutation and COX-2 expression in gastric cancer. COX-2 over-expression was seen in 19 (48.7%) cases. These tumours had more lymph-node metastasis (P = 0.048) and tended to have a poorer survival (P = 0.07). Missense mutations of p53 were detected in 20 (51.3%) patients and had a significantly stronger COX-2 expression than tumours without p53 mutation (P = 0.016). Our results suggest a link between p53 mutation and COX-2 overexpression in gastric cancer.
authors.affiliation: Departments of Medicine and Therapeutics, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, Hong Kong.
authors.forename: W K
authors.initials: WK
authors.lastname: Leung
authors.forename: K F
authors.initials: KF
authors.lastname: To
authors.forename: Y P
authors.initials: YP
authors.lastname: Ng
authors.forename: T L
authors.initials: TL
authors.lastname: Lee
authors.forename: J Y
authors.initials: JY
authors.lastname: Lau
authors.forename: F K
authors.initials: FK
authors.lastname: Chan
authors.forename: E K
authors.initials: EK
authors.lastname: Ng
authors.forename: S C
authors.initials: SC
authors.lastname: Chung
authors.forename: J J
authors.initials: JJ
authors.lastname: Sung
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D051546:Cyclooxygenase 2; D004247:DNA / Q000737:chemistry / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007527:Isoenzymes / Q000096:biosynthesis*; D008297:Male; D008565:Membrane Proteins; D008875:Middle Aged; D020125:Mutation, Missense; D018807:Polymorphism, Single-Stranded Conformational; D011451:Prostaglandin-Endoperoxide Synthases / Q000096:biosynthesis*; D013274:Stomach Neoplasms / Q000201:enzymology / Q000235:genetics / Q000473:pathology*; D016019:Survival Analysis; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: D007527:Isoenzymes; D008565:Membrane Proteins; D016159:Tumor Suppressor Protein p53; D004247:DNA; D051546:Cyclooxygenase 2; C496540:PTGS2 protein, human; D011451:Prostaglandin-Endoperoxide Synthases