TRIM47 promotes head and neck squamous cell carcinoma malignant progression by degrading XAF1 through ubiquitination

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Tripartite motif-containing 47 (TRIM47) is an E3 ligase implicated in tumor development.
• TRIM47 is frequently overexpressed in various cancers, suggesting a role in tumorigenesis.

Purpose of the Study:

• To investigate the role of TRIM47 in head and neck squamous cell carcinoma (HNSCC).
• To elucidate the molecular mechanisms by which TRIM47 influences HNSCC progression.

Main Methods:

• Quantitative analysis of TRIM47 expression in HNSCC tissues.
• Cell proliferation, apoptosis, and autophagy assays in HNSCC cell lines with TRIM47 manipulation.
• Co-immunoprecipitation and Western blotting to study protein interactions and degradation.
• In vivo tumor xenograft models in animals.

Main Results:

• TRIM47 is highly expressed in HNSCC tissues and promotes HNSCC cell proliferation.
• TRIM47 downregulation inhibits proliferation, induces apoptosis, and promotes autophagy, effects partially reversible by autophagy inhibition.
• TRIM47 interacts with XIAP-associated factor 1 (XAF1), promoting its ubiquitination and degradation.
• XAF1 overexpression reverses TRIM47-induced proliferation and autophagy inhibition.
• TRIM47 knockdown inhibits tumor growth in vivo.

Conclusions:

• TRIM47 promotes HNSCC progression by mediating the ubiquitination and degradation of XAF1.
• This interaction suppresses apoptosis and autophagy, contributing to tumor development.
• TRIM47 represents a potential therapeutic target for HNSCC treatment.