Loss of TRAIP Could Attenuate the Breast Cancer Cells Development by Regulating PLSCR4 Stabilization

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Tumor necrosis factor receptor-associated factor interacting protein (TRAIP) is implicated in various cancers.
• The precise role and mechanisms of TRAIP in breast cancer pathogenesis require further investigation.

Purpose of the Study:

• To elucidate the functional role of TRAIP in breast cancer.
• To investigate the underlying molecular mechanisms of TRAIP in breast cancer progression.
• To identify TRAIP as a potential therapeutic target for breast cancer.

Main Methods:

• Bioinformatics analysis of TCGA and GTEx datasets for TRAIP expression.
• Experimental validation using immunohistochemistry, qRT-PCR, and western blot.
• In vitro functional assays (proliferation, migration, invasion, apoptosis) and mechanistic studies (co-IP, ubiquitination assays).

Main Results:

• TRAIP is significantly overexpressed in breast cancer tissues.
• TRAIP knockdown suppresses breast cancer cell proliferation, colony formation, migration, and invasion, while increasing apoptosis.
• TRAIP acts as an E3 ubiquitin ligase, targeting PLSCR4 for proteasomal degradation via K48-linked polyubiquitination.

Conclusions:

• A novel TRAIP/PLSCR4 regulatory axis is identified in breast cancer.
• TRAIP promotes oncogenesis by degrading the tumor-suppressive protein PLSCR4.
• TRAIP represents a promising therapeutic target for precision breast cancer interventions.