Phosphorylated STAT3 (Tyr705) as a biomarker of response to pimozide treatment in triple-negative breast cancer

Cancer Biology & Therapy
Sundee DeesIsabelle Mercier

Abstract

Triple-negative breast cancer (TNBC) displays an aggressive clinical course, heightened metastatic potential, and is linked to poor survival rates. Through its lack of expression of the estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2), this subtype remains unresponsive to traditional targeted therapies. Undesirable and sometimes life-threatening side effects associated with current chemotherapeutic agents warrant the development of more targeted treatment options. Targeting signal transducer and activator of transcription 3 (STAT3), a transcription factor implicated in breast cancer (BCa) progression, has proven to be an efficient approach to halt cancer growth in vitro and in vivo. Currently, there are no FDA-approved STAT3 inhibitors for TNBC. Although pimozide, a FDA-approved antipsychotic drug, has been attributed a role as a STAT3 inhibitor in several cancers, its role on this pathway remains unexplored in TNBC. As a "one size fits all" approach cannot be applied to TNBC therapies due to the heterogeneous nature of this aggressive cancer, we hypothesized that STAT3 could be a novel biomarker of response to guide pimozide therapy. Using human cell lines representative o...Continue Reading

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Related Concepts

Antineoplastic Agents
Biological Markers
Malignant Neoplasm of Breast
Malignant Neoplasms
Down-Regulation
Medicine
Neoplasm Metastasis
Phosphorylation
Pimozide
Epidermal Growth Factor Receptor

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