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Homeobox and Polycomb target gene methylation in human solid tumors
Reid Blanchett1, Kin H Lau2, Gerd P Pfeifer3
1Department of Epigenetics, Van Andel Institute, 333 Bostwick Ave. NE, Grand Rapids, MI, 49503, USA.
Scientific Reports
|June 17, 2024
Summary
DNA methylation patterns in homeobox genes are altered in cancer. Two homeobox genes, HOXA3 and HOXD10, show hypermethylation across all 16 cancer types studied, offering potential diagnostic biomarkers.
Area of Science:
- Epigenetics and Genomics
- Cancer Biology
Background:
- DNA methylation is a key epigenetic regulator influencing cancer phenotypes.
- Aberrant DNA methylation, including global hypomethylation and focal hypermethylation, characterizes tumors.
- Homeobox genes and Polycomb Repressive Complex 2 targets are implicated in oncogenesis and hold potential as cancer biomarkers.
Purpose of the Study:
- To perform a pan-cancer DNA methylation analysis focusing on homeobox genes.
- To identify common and cancer-specific DNA methylation patterns.
- To explore the potential of homeobox genes as cancer biomarkers.
Main Methods:
- Utilized sixteen The Cancer Genome Atlas (TCGA) Illumina HM450k array datasets for pan-cancer analysis.
- Compared DNA methylation profiles between tumor and normal samples.
- Focused analysis on differentially methylated regions within homeobox genes.
Main Results:
- Homeobox genes frequently exhibit significant hypermethylated differentially methylated regions in tumors compared to normal tissues.
- HOXA3 and HOXD10 were identified as hypermethylated in all 16 analyzed cancer types.
- Several homeobox genes were found to be uniquely methylated in specific cancer types, suggesting potential as single-tumor biomarkers.
Conclusions:
- Demonstrates distinct DNA methylation patterns across multiple cancer types.
- Highlights the significant role of homeobox gene hypermethylation in oncogenesis.
- Identifies HOXA3 and HOXD10 as pan-cancer hypermethylated homeobox genes and suggests others as potential cancer-specific screening tools.
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