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Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
Published on: September 18, 2020
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The Hypoxic Landscape Stratifies Gastric Cancer Into 3 Subtypes With Distinct M6a Methylation and Tumor
Zhi-Kun Ning1, Ce-Gui Hu2, Jiang Liu2
1Department of Day Ward, The First Affiliated Hospital of Nanchang University, Nanchang, China.
Frontiers in Immunology
|July 8, 2022
Summary
This study reveals how RNA N6-methyladenosine (m6A) modifications change with hypoxia in gastric cancer. It developed a new prognostic signature to predict patient outcomes and guide immunotherapy decisions.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- The interplay between hypoxia and RNA N6-methyladenosine (m6A) is gaining attention.
- m6A alterations under varying hypoxia levels are uncharacterized in gastric cancer (GC).
Purpose of the Study:
- To investigate m6A modification patterns at different hypoxia levels in GC.
- To develop a prognostic signature for GC patients based on m6A and hypoxia pathway genes.
- To evaluate the signature's predictive capability and clinical implications for immunotherapy.
Main Methods:
- Unsupervised hierarchical clustering to stratify GC samples.
- m6A score development using differential gene expression and Cox regression.
- LASSO regression and bootstrapping to identify predictive genes.
- Nomogram construction for prognostic evaluation.
Main Results:
- A novel m6A-related hypoxia pathway gene prognostic signature was established.
- The developed nomogram demonstrated high predictive accuracy (AUC=0.811).
- Significant differences in anti-PD-1/CTLA-4 immunotherapy response were observed between high- and low-risk groups.
Conclusions:
- The study introduces a new GC pathological classification based on hypoxia and m6A patterns.
- The prognostic signature offers a reliable tool for clinical decision-making in GC.
- This signature can guide personalized immunotherapeutic strategies for GC patients.
