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Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
Published on: September 18, 2020
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Molecular Network Profiling in Intestinal- and Diffuse-Type Gastric Cancer.
Shihori Tanabe1, Sabina Quader2, Ryuichi Ono3
1Division of Risk Assessment, Center for Biological Safety and Research, National Institute of Health Sciences, Kawasaki 210-9501, Japan.
Cancers
|December 23, 2020
Summary
This study reveals key gene expression differences between intestinal and diffuse gastric cancer, uncovering 10 genes and 463 molecular relationships. These findings offer new insights into cancer stem cell features and drug resistance mechanisms in gastric cancer subtypes.
Area of Science:
- Oncology
- Molecular Biology
- Bioinformatics
Background:
- Epithelial-mesenchymal transition (EMT) drives cancer stem cell (CSC) traits and drug resistance, crucial for malignancy.
- Signaling pathways are implicated in cancer progression, but their precise roles in EMT and CSCs remain unclear.
Purpose of the Study:
- To analyze gene expression and molecular pathways in intestinal and diffuse-type gastric cancer (GC).
- To identify differences in gene expression and signaling networks between GC subtypes.
- To elucidate mechanisms of drug resistance in CSCs.
Main Methods:
- Analysis of public RNAseq data for intestinal and diffuse-type GC.
- Utilized Ingenuity Pathway Analysis (IPA) for network pathway analysis.
- Identified differentially expressed genes and molecular relationships using bioinformatics.
Main Results:
- Found 2815 differentially expressed probe set IDs between intestinal and diffuse GC.
- Identified 10 key genes (e.g., MSL3P1, CKS1B, DDX27) with distinct expression patterns.
- Uncovered 463 direct relationships involving MYC, NTRK1, and UBE2M in a biomarker-filtered network.
Conclusions:
- Significant differences in gene expression and signaling pathways exist between intestinal and diffuse GC subtypes.
- The identified genes and networks provide novel insights into gastric cancer progression.
- This research sheds light on the mechanisms of drug resistance in CSCs, potentially guiding future therapeutic strategies.
