Multi-omics analysis reveals RNA splicing alterations and their biological and clinical implications in lung...

Area of Science:

• Molecular Biology
• Genomics
• Cancer Research

Background:

• Alternative RNA splicing is a key mechanism for posttranscriptional gene regulation and protein diversity.
• Dysregulation of RNA splicing is implicated in cancer development, driving the need for splice-switching therapeutics.
• While other molecular aspects of lung adenocarcinoma (LUAD) are well-studied, its alternative splicing profiles remain largely unexplored.

Purpose of the Study:

• To systematically investigate RNA splicing alterations in LUAD using multi-omics data.
• To reveal the biological and clinical implications of aberrant alternative splicing events (AASEs) in LUAD.
• To explore the potential of targeting splicing alterations for LUAD treatment.

Main Methods:

• Analysis of multi-omics data from over 1000 LUAD samples.
• Identification and characterization of aberrant alternative splicing events (AASEs).
• Interrogation of regulatory roles of RNA binding proteins, somatic mutations, and DNA methylation on AASEs.

Main Results:

• Identified 3688 AASEs in LUAD, predominantly alternative promoter and exon skipping events.
• Demonstrated that AASEs significantly affect biological processes crucial for tumor proliferation and metastasis.
• Discovered a LUAD subtype with a distinct AASEs pattern that exhibits immunogenicity, improved prognosis, and enhanced response to immunotherapy.

Conclusions:

• Aberrant alternative splicing plays a significant role in LUAD tumorigenesis and the tumor immune microenvironment.
• AASEs represent potential therapeutic targets for developing novel splice-switching strategies in LUAD.
• Findings provide a foundation for personalized medicine approaches in LUAD based on splicing profiles.