Expression and regulatory network of E3 ubiquitin ligase NEDD4 family in cancers

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• The NEDD4 family of E3 ligases regulates critical cellular processes like proliferation, inflammation, and cell junctions.
• Emerging evidence implicates NEDD4 family members in tumor initiation and progression.

Purpose of the Study:

• To systematically investigate molecular alterations and clinical relevance of NEDD4 family genes across 33 cancer types.
• To elucidate the role of NEDD4 E3 ligases in cancer development and patient outcomes.

Main Methods:

• Bioinformatic analysis of molecular alterations (expression, mutation, copy number) in NEDD4 family genes across 33 cancer types.
• Protein-protein interaction network analysis to identify enriched pathways.
• Experimental validation using Western blot and flow cytometry in lung cancer cell lines (A549, H1299).

Main Results:

• NEDD4 gene expression is elevated in pancreatic cancer and reduced in thyroid cancer.
• NEDD4 family genes exhibit mutation frequencies up to 32.1%, with HECW1 and HECW2 showing high rates.
• Breast cancer shows significant NEDD4 copy number amplification.
• Interacting proteins are enriched in cancer-related pathways (p53, Akt, apoptosis, autophagy).
• NEDD4 gene expression is associated with cancer patient survival.

Conclusions:

• NEDD4 E3 ligase genes exhibit significant molecular alterations across various cancers.
• These alterations and associated pathways impact cancer progression and patient survival.
• Findings offer insights into the potential of NEDD4 family genes as future therapeutic targets in cancer treatment.