Multiomic Characterization and Molecular Profiling of Nuclear Protein in Testis Carcinoma

Area of Science:

• Oncology
• Genomics
• Cancer Research

Background:

• Nuclear protein in testis carcinoma (NC) is an aggressive, underdiagnosed cancer.
• NC is characterized by NUTM1 gene rearrangements on chromosome 15q14.
• Co-occurring genetic alterations in NC are not fully understood.

Purpose of the Study:

• To comprehensively analyze the genomic and immune landscape of NC.
• To identify co-occurring mutations and characterize the tumor microenvironment.
• To compare NC with other squamous cell carcinomas.

Main Methods:

• Genomic and immune profiling of 54 NC cases using DNA and RNA next-generation sequencing (NGS).
• Analysis included Caris molecular data.
• Comparison of NC with head and neck squamous cell carcinoma (HNSCC) and lung squamous cell carcinoma (LUSC).

Main Results:

• NC is driven by NUTM1 fusion oncoproteins.
• 26% of NC cases had co-occurring DNA mutations in epigenetic or cell cycle pathways.
• NC exhibits increased MYC pathway activity and significantly lower immune cell infiltration compared to HNSCC and LUSC.
• NC incidence is higher in HNSCC/LUSC patients younger than 50 years.

Conclusions:

• This is the first broad DNA and RNA profiling of NC.
• Reduced immune cell infiltration in NC may explain limited immunotherapy response.
• High MYC pathway activity supports ongoing MYC-targeted therapies.
• Testing for NC in younger HNSCC/LUSC patients is recommended.
• Improved immunotherapy and MYC targeting are crucial for dismal NC prognosis.