title: A comparative study: immunohistochemical detection of cytosolic thymidine kinase and proliferating cell nuclear antigen in breast cancer.
abstract: To explore the expression of cytosolic thymidine kinase 1 (TK1) as a cell proliferative marker in human breast cancers, immunohistochemistry was used to detect the expression of TK1 in 52 malignant breast lesions, 20 benign breast lesions, and 16 normal breast tissues. The results were compared to the expression of proliferating cell nuclear antigen (PCNA) in the same specimens. The TK1-labelling index (TK1-LI) and PCNA-labeling index (PCNA-LI) were significantly higher in malignant lesions than in nonmalignant lesions (p < 0.0001 and p < 0.0013, respectively). The TK1-LI (78.9%) in malignant lesions was higher compared to PCNA-LI (64.5%). No significant difference was found for TK1-LI and PCNA-LI between benign lesions and normal tissues. Concerning the tumor stages and the tumor grades, TK1-LI showed a significant correlation with the increased tumor stages (p = 0.023) and tumor grades (p = 0.009). However, PCNA-LI was neither significantly different in tumor stages (p = 0.062) nor in tumor grades (p = 0.073). We conclude that TK1 might be a more accurate marker than PCNA for estimation of cell proliferation and malignant potentials in breast carcinomas.
authors.affiliation: Department of Pathology, Hubei Cancer Hospital, Wuhan, China.
authors.forename: Yongrong
authors.initials: Y
authors.lastname: Mao
authors.forename: Jianping
authors.initials: J
authors.lastname: Wu
authors.forename: Naining
authors.initials: N
authors.lastname: Wang
authors.forename: Lanxiang
authors.initials: L
authors.lastname: He
authors.forename: Chuanjing
authors.initials: C
authors.lastname: Wu
authors.forename: Qimin
authors.initials: Q
authors.lastname: He
authors.forename: Sven
authors.initials: S
authors.lastname: Skog
mesh_terms: D000230:Adenocarcinoma / Q000737:chemistry* / Q000473:pathology; D000328:Adult; D015415:Biomarkers / Q000032:analysis; D001943:Breast Neoplasms / Q000737:chemistry* / Q000473:pathology / Q000556:secondary; D016022:Case-Control Studies; D003600:Cytosol / Q000737:chemistry; D005260:Female; D018226:Fibroadenoma / Q000737:chemistry* / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D008875:Middle Aged; D009367:Neoplasm Staging; D018300:Papilloma, Intraductal / Q000737:chemistry* / Q000473:pathology; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis*; D012016:Reference Values; D013937:Thymidine Kinase / Q000032:analysis*
chemical_list: D015415:Biomarkers; D018809:Proliferating Cell Nuclear Antigen; D013937:Thymidine Kinase