TRPS1 Confers Multidrug Resistance of Breast Cancer Cells by Regulating BCRP Expression

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• Multidrug resistance (MDR) significantly hinders effective breast cancer (BCa) treatment.
• Understanding the molecular mechanisms of chemoresistance is crucial for therapeutic advancement.
• Previous studies suggest a link between TRPS1 and breast cancer progression.

Purpose of the Study:

• To investigate the specific role of TRPS1 in the development of chemoresistance in breast cancer.
• To elucidate the molecular pathway through which TRPS1 influences drug resistance.
• To identify TRPS1 as a potential therapeutic target for overcoming MDR in BCa.

Main Methods:

• Bioinformatic analysis of publicly available breast cancer datasets.
• In vitro experiments involving manipulation of TRPS1 expression in BCa cells.
• Assessment of BCRP expression and function.
• Immunohistochemical analysis of TRPS1 and BCRP correlation in patient samples.
• MTT assays to evaluate chemosensitivity.

Main Results:

• TRPS1 overexpression was correlated with chemoresistance in breast cancer data.
• TRPS1 directly regulates the expression of BCRP, a drug efflux transporter.
• Upregulation of TRPS1 increased BCRP levels, while TRPS1 inhibition decreased BCRP.
• A significant correlation between TRPS1 and BCRP was observed in 180 BCa patient samples.
• Modulating TRPS1 expression altered the chemosensitivity of breast cancer cells.

Conclusions:

• High TRPS1 expression confers multidrug resistance in breast cancer.
• This MDR is mediated through the regulation of BCRP expression and function.
• TRPS1 represents a novel mechanism contributing to BCa chemoresistance.
• Targeting TRPS1 could offer a new strategy to overcome chemoresistance in breast cancer treatment.