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BCL6 Inhibitors Exhibit Therapeutic Effects on Breast Cancer Cells through the BCL6-STAT4 Pathway
Zai Wang1, Mengtian Tan2, Junqi Zhang2
1Science and Education Division, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei, 056000, China.
Objective:
This study aimed to explore the roles of BCL6 and STAT4 in breast cancer, their biological functions, and their relationships with the prognosis of patients with breast cancer.
Methods:
Online databases were used to analyze the expression characteristics of BCL6 and STAT4 in breast cancer, as well as the correlation between STAT4 and both the prognosis of breast cancer patients and the biological function of breast cancer cells. BC cell lines, such as MCF7 and MDA-436 cells, were treated with the BCL6 inhibitor TP-021, and STAT4 and BCL6 mRNA expression levels were detected. Sh-RNAs were used to downregulate STAT4 in MCF7 and MDA-436 cells, and their proliferation ability was measured via a CCK-8 assay.
Results:
BCL6 expression was detected in BC cell lines and tissues, but the expression of STAT4 was downregulated in BC, and the expression level of STAT4 was negatively correlated with patient prognosis. Inhibition of BCL6 can increase the STAT4 level in BC cells and inhibit their proliferation ability in vitro. Poor prognosis may be related to the expression of STAT4 and the characteristics of immune cell infiltration in tumor tissues.
Conclusion:
BCL6 inhibitors demonstrated therapeutic effects on breast cancer cells through the BCL6-STAT4 pathway.
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