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Merging Absolute and Relative Quantitative PCR Data to Quantify STAT3 Splice Variant Transcripts
Published on: October 9, 2016
Intron retention regulates STAT2 function and predicts immunotherapy response in lung cancer.
Ryan P Englander1,2, Mattia Brugiolo1, Te-Chia Wu1
1The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA.
Alternative RNA splicing impacts tumor immunity and immunotherapy response in lung cancer. Specific STAT2 intron retention predicts patient response to checkpoint inhibitors, offering potential biomarkers.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Immunotherapy response varies significantly among lung cancer patients.
- The molecular factors driving these differential outcomes are not fully understood.
Purpose of the Study:
- To investigate the role of alternative RNA splicing in human lung adenocarcinomas.
- To identify novel mRNA isoforms and their potential as biomarkers for immunotherapy response.
Main Methods:
- Long-read RNA-sequencing was employed to profile mRNA isoforms in primary lung adenocarcinomas.
- Analysis focused on identifying full-length mRNA isoforms, particularly in immune-related genes.
Main Results:
- Over 180,000 full-length mRNA isoforms were identified, with >50% being novel.
- Many novel isoforms were found in immune genes, especially within the type I interferon pathway.
- Retained introns in STAT2 generated altered protein isoforms regulating immune signaling; STAT2 intron retention levels predicted patient response to checkpoint inhibitors.
Conclusions:
- Alternative splicing is a critical regulator of tumor immune responses in lung cancer.
- mRNA splicing alterations, like STAT2 intron retention, are promising biomarkers for predicting immunotherapy efficacy.
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