title: Stromal myofibroblasts in breast cancer: relations between their occurrence, tumor grade and expression of some tumour markers.
abstract: It is suggested that tumour stromal myofibroblasts exert an unfavourable effect on the biology of breast cancer. We are aware of only a single study which examined relationships between manifestation of myofibroblasts in the stroma of breast cancer and clinicopathological data of the patients. The present study was aimed at estimation of the effect exerted by myofibroblasts present in the tumour stroma on principal pathological parameters and on expression of Ki67, P53 and HER-2 proteins in the group of the most frequent breast cancers, the ductal cancers. In paraffin sections of 60 ductal breast cancers (20 cases in G1, 20 in G2 and 20 in G3), immunohistochemical reactions were performed to detect expression of smooth muscle actin (SMA) in order to visualize myofibroblasts, Ki67, P53 and HER-2. The studies demonstrated that the most numerous myofibroblasts were present in G3 cases and they were the least frequent in G1 cases (P = 0.02). Positive correlations were observed between the presence of myofibroblasts in tumour stroma and expression of Ki67 and HER-2 in breast cancer cells in the entire group (P < 0.001 and P = 0.001, respectively), in G2 cases (P = 0.003 and P = 0.03) and in G3 cases (P = 0.01 and P = 0.03). Considering that the higher grade, Ki67 and HER-2 are thought to represent unfavourable prognostic factors, the elevated content of myofibroblasts in tumour stroma is probably typical for cases with worse prognosis.
authors.affiliation: Department of Histology and Embryology, University School of Medicine, Wrocław, Poland. pawel.surowiak@interia.pl
authors.forename: Paweł
authors.initials: P
authors.lastname: Surowiak
authors.forename: Sławomir
authors.initials: S
authors.lastname: Suchocki
authors.forename: Balazs
authors.initials: B
authors.lastname: Györffy
authors.forename: Tserenchunt
authors.initials: T
authors.lastname: Gansukh
authors.forename: Andrzej
authors.initials: A
authors.lastname: Wojnar
authors.forename: Adam
authors.initials: A
authors.lastname: Maciejczyk
authors.forename: Marek
authors.initials: M
authors.lastname: Pudełko
authors.forename: Maciej
authors.initials: M
authors.lastname: Zabel
mesh_terms: D000199:Actins / Q000378:metabolism; D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism*; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology*; D005347:Fibroblasts / Q000473:pathology*; D006801:Humans; D019394:Ki-67 Antigen / Q000378:metabolism; D008875:Middle Aged; D009130:Muscle, Smooth / Q000378:metabolism; D009367:Neoplasm Staging; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism; D017154:Stromal Cells / Q000473:pathology*; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism
chemical_list: D000199:Actins; D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D018719:Erb-b2 Receptor Tyrosine Kinases; D016159:Tumor Suppressor Protein p53