title: Protein accumulation and gene mutation of p53 in bilateral breast cancer. South-East Sweden Breast Cancer Group.
abstract: The aim of this study was to investigate the frequency of p53 alterations in bilateral breast cancer and to evaluate a possible clonal relationship between the paired tumours regarding p53 alteration and other pathobiological variables. Tumours from 34 patients were investigated with immunohistochemistry, single strand conformation polymorphism analysis and DNA-sequence analysis applied to exons 5-8. Fifteen percent of the 68 tumours showed positive immunoreaction and/or presence of mutation. The occurrence of p53 accumulation was 9% and the prevalence of gene mutation 10%. No significant concordance was found between the tumours in the same patient for p53 alterations, progesterone receptor status or DNA ploidy. S-phase fraction showed a weak correlation, not statistically significant. Oestrogen receptor status was the only variable that exhibited a significant concordance. No convincing evidence was found for other associations between the paired tumours or for a high prevalence of p53 alterations in bilateral breast cancer.
authors.affiliation: Department of Biomedicine and Surgery, Faculty of Health Sciences, University Hospital, Linköping, Sweden. marie.stenmark@onk.liu.se
authors.forename: M
authors.initials: M
authors.lastname: Stenmark-Askmalm
authors.forename: M
authors.initials: M
authors.lastname: Gentile
authors.forename: S
authors.initials: S
authors.lastname: Wingren
authors.forename: O
authors.initials: O
authors.lastname: Ståhl
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics* / Q000378:metabolism; D004273:DNA, Neoplasm / Q000032:analysis; D005260:Female; D016158:Genes, p53; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D009154:Mutation; D011003:Ploidies; D018807:Polymorphism, Single-Stranded Conformational; D011960:Receptors, Estrogen / Q000032:analysis; D011980:Receptors, Progesterone / Q000032:analysis; D016196:S Phase; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis / Q000276:immunology
chemical_list: D004273:DNA, Neoplasm; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D016159:Tumor Suppressor Protein p53