title: Immunohistochemical detection of estrogen receptor in invasive human breast cancer: correlation with heat shock proteins, pS2 and oncogene products.
abstract: The authors immunohistochemically studied the expression of the estrogen receptor (ER), 27-kD heat shock protein (HSP27) and pS2 in 118 invasive primary human breast cancers. Positive nuclear staining of the ER was detected in 64% of the cases and was closely correlated with the biochemical assay (p < 0.0001). ER-positive tumors were significantly decreased with tumor size and stage (p < 0.001 each), but not with lymph node status. Positivity of the ER was correlated with the cytoplasmic expression of HSP27 (p < 0.005), pS2 (not significant) and HSP70 (not significant). ER negativity was significantly correlated with the expression of p53, epidermal growth factor receptor (EGFR) and c-erbB-2 (p < 0.05 each). Thus, it was concluded that ER-positive breast carcinomas, relatively small in size, preferentially expressed HSP27, HSP70 and pS2 and that ER-negative tumors, relatively large in size, were predisposed to express p53, EGFR and c-erbB-2.
authors.affiliation: Division of Clinical Pathology, Sapporo Medical University Hospital, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Takahashi
authors.forename: E
authors.initials: E
authors.lastname: Narimatsu
authors.forename: H
authors.initials: H
authors.lastname: Asanuma
authors.forename: M
authors.initials: M
authors.lastname: Okazaki
authors.forename: A
authors.initials: A
authors.lastname: Okazaki
authors.forename: K
authors.initials: K
authors.lastname: Hirata
authors.forename: M
authors.initials: M
authors.lastname: Mori
authors.forename: T
authors.initials: T
authors.lastname: Chiba
authors.forename: N
authors.initials: N
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Kikuchi
mesh_terms: D001943:Breast Neoplasms / Q000737:chemistry* / Q000473:pathology; D066246:ErbB Receptors / Q000032:analysis; D004967:Estrogens; D005260:Female; D018840:HSP70 Heat-Shock Proteins / Q000032:analysis; D006360:Heat-Shock Proteins / Q000032:analysis*; D006801:Humans; D007150:Immunohistochemistry; D009361:Neoplasm Invasiveness; D009363:Neoplasm Proteins / Q000032:analysis*; D015513:Oncogene Proteins / Q000032:analysis*; D011506:Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000032:analysis; D011960:Receptors, Estrogen / Q000032:analysis*; D000071163:Trefoil Factor-1; D016159:Tumor Suppressor Protein p53 / Q000032:analysis; D025521:Tumor Suppressor Proteins
chemical_list: D066246:ErbB Receptors; D004967:Estrogens; D018840:HSP70 Heat-Shock Proteins; D006360:Heat-Shock Proteins; D009363:Neoplasm Proteins; D015513:Oncogene Proteins; D011506:Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D000071163:Trefoil Factor-1; D016159:Tumor Suppressor Protein p53; D025521:Tumor Suppressor Proteins; C051838:TFF1 protein, human