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Genome-wide analysis of epigenetics in cancer
1Laboratory of Population Genetics, National Cancer Institute, 41 Library Drive D702C, Bethesda, Maryland 20892, USA. leemax@mail.nih.gov
Abstract:
Human cancers are caused by multiple mechanisms. Research in the last 30 years has firmly established the roles of a group of genes including oncogenes, tumor suppressor genes, and DNA repair genes in human cancers. The activation and inactivation of these cancer genes can be caused by genetic mutations or epigenetic alterations. The epigenetic changes in cancers include methylation of CpG islands, loss of imprinting, and chromatin modification. The completion of the genome sequences of many organisms including the human has transformed the traditional approach to molecular biology research into an era of functional genome research. Traditional research usually involves the study of one or a few genes (proteins) in a particular biological process in normal physiology or disease. Functional genome research takes advantage of newly available genome sequences and high-throughput genome technologies to study genes and/or proteins to inform the perspective of entire biological processes. I will focus on recent progress in the identification of imprinted genes and methylation of CpG islands through genome-wide analysis.
Insights
Human cancers arise from genetic and epigenetic alterations. Genome-wide analysis is advancing the identification of key cancer genes, including imprinted genes and CpG island methylation, crucial for understanding cancer development.
Area of Science:
- Genetics
- Epigenetics
- Cancer Biology
Background:
- Human cancers result from multiple genetic and epigenetic mechanisms.
- Key genes like oncogenes, tumor suppressor genes, and DNA repair genes play critical roles.
- Epigenetic alterations, including CpG island methylation and loss of imprinting, contribute to cancer gene dysregulation.
Purpose of the Study:
- To review recent advancements in identifying imprinted genes and CpG island methylation.
- To highlight the shift towards functional genome research using high-throughput technologies.
- To provide a genome-wide perspective on cancer gene alterations.
Main Methods:
- Genome-wide analysis for gene identification.
- High-throughput genome technologies.
- Functional genomics approaches.
Main Results:
- Progress in identifying imprinted genes across the human genome.
- Advancements in mapping CpG island methylation patterns in cancer.
- Demonstration of genome-wide approaches for biological process studies.
Conclusions:
- Genome-wide analysis is revolutionizing cancer gene research.
- Identification of imprinted genes and CpG methylation is crucial for understanding cancer.
- Functional genomics offers a comprehensive view of cancer mechanisms.