title: Costimulatory molecule OX40/OX40L expression in ductal carcinoma in situ and invasive ductal carcinoma of breast: an immunohistochemistry-based pilot study.
abstract: OX40, a membrane-bound member of the tumor-necrosis-factor-receptor (TNFR) superfamily, plays an important role in proliferation, survival and infiltration of activated T cells via binding to OX40L. Recent studies indicate that OX40/OX40L system mediates the adhesion and infiltration of adult T cell leukemia (ATL). Previously, we detected OX40 expression in breast carcinoma cell lines and tissues. The correlation of expression of OX40 and OX40L and clinical features in breast carcinogenesis, however, has not been well characterized. The expression of OX40 and OX40L in 107 invasive ductal carcinomas (IDCa), 9 ductal carcinomas in situ (DCIS), and 31 fibroadenomas from breast tissues and its relationship with the clinical features were determined using immunohistochemistry (peroxidase-conjugated polymer method, ChemMate™ Envision™ Detection kit). The positive immunostaining rates for OX40 in IDCa, DCIS and fibroadenomas from breast tissues were 85.0%, 66.7% and 38.7% respectively, showing a significant difference in OX40 expression among IDCa, DCIS and fibroadenoma of breast (z=5.206, P=0.001). Increased staining intensity of OX40 was associated with TNM stages (z=2.112, P=0.017). Meanwhile, a relation of OX40 expression with lymph node metastatic status in IDCa was found (P=0.041). The expression of OX40L did not show any obvious difference among IDCa, DCIS and fibroadenomas from breast tissues. OX40L expression was also not related to histopathological parameters in IDCa except for progesterone receptor (PR) being positive (P=0.005). However, a high coincidental positive rate for OX40 and OX40L was observed in biopsy samples with IDCa (P=0.017, Kappa=0.231). The present results suggest that high OX40 expression may be associated with malignant transformation, progression, invasion and metastasis in breast cancer biology.
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Soochow University, 181 Renai Road, Suzhou 215123, PR China.
authors.forename: Fang
authors.initials: F
authors.lastname: Xie
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.forename: Yongjing
authors.initials: Y
authors.lastname: Chen
authors.forename: Yongping
authors.initials: Y
authors.lastname: Gu
authors.forename: Hui
authors.initials: H
authors.lastname: Mao
authors.forename: Wang
authors.initials: W
authors.lastname: Zeng
authors.forename: Xueguang
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000378:metabolism; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology / Q000601:surgery; D018270:Carcinoma, Ductal, Breast / Q000378:metabolism* / Q000473:pathology / Q000601:surgery; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000378:metabolism* / Q000473:pathology / Q000601:surgery; D005260:Female; D018226:Fibroadenoma / Q000378:metabolism / Q000473:pathology / Q000601:surgery; D019085:Fluorescent Antibody Technique, Direct; D006801:Humans; D007124:Immunoenzyme Techniques; D008198:Lymph Nodes / Q000378:metabolism / Q000473:pathology; D008207:Lymphatic Metastasis; D008875:Middle Aged; D053278:OX40 Ligand / Q000378:metabolism*; D053262:Receptors, OX40 / Q000378:metabolism*; D011980:Receptors, Progesterone / Q000378:metabolism; D055815:Young Adult
chemical_list: D014408:Biomarkers, Tumor; D053278:OX40 Ligand; D053262:Receptors, OX40; D011980:Receptors, Progesterone; C505716:TNFRSF4 protein, human; C089251:TNFSF4 protein, human