T-box transcription factor 21 expression in breast cancer and its relationship with prognosis

Haiming Yu, Junlan Yang, Shunchang Jiao, Ying Li, Wei Zhang, Jiandong Wang
International Journal of Clinical and Experimental Pathology 2014, 7 (10): 6906-13

PURPOSE: T-box transcription factor 21 (T-bet) is a key lineage-defining transcription factor. The purpose of this study was to verify the relationship between expression in primary tumors and prognosis of breast cancer.

METHODS: T-protein expression was immunohistochemically detected on surgically-obtained tumor samples of 130 (stage I-III) invasive breast carcinomas from Chinese subjects, who were followed up for a mean time of 112 months.

RESULTS: T-bet was expressed in the nuclei and cytoplasm of both tumor cells and tumor-infiltrating lymphocytes. In LOG-RANK analysis, higher density of interstitial T-bet+ interstitial lymphocytes was related with longer distant disease-free survival (DDFS) (P = 0.047); higher tumor nuclei T-bet expression was related with shorter DFS (P = 0.021) and DDFS (P = 0.026). Cox multivariate analysis showed that density of interstitial T-bet+ interstitial lymphocytes was an independent positive prognostic factor for DFS (HR = 0.474, P = 0.051) and DDFS (HR = 0.414, P = 0.030); tumor nuclei CTLA-4 expression was an independent adverse prognostic factor for DFS (HR = 3.007, P = 0.003), DDFS (HR = 2.931, P = 0.005) and OS (HR = 2.352, P = 0.029).

CONCLUSIONS: This study found that, high tumor nuclei T-bet expression in primary tumors of breast cancer was correlated with poor prognosis and high density of T-bet+ interstitial lymphocytes in primary tumors of breast cancer were correlated with favorable prognosis.

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