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Chapter category: DNA

DNA Methyltransferase Inhibitors: Paving the Way for Epigenetic Cancer Therapeutics

This chapter appears in the following book:

DNA Methylation and Cancer Therapy

Edited by: Moshe Szyf
ISBN: 0-306-47848-X
» Get more information about this book at landesbioscience.com «

Chapter authors:
Gregory K. Reid and A. Robert MacLeod


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Our increased understanding of the molecular pathophysiology of cancer is beginning to impact our ability to effectively treat this disease. The recent success of the tyrosine kinase inhibitor Gleevec™ is a prime example of this. In this case, the molecular etiology of the disease (chronic myelogenous leukemia (CML) and gastrointestinal stromal tumors (GIST)) was understood and targeted with a highly selective pharmaceutical agent, the result being dramatic clinical benefit and amazingly few side effects.1 While only the beginning, this success story provides renewed hope that the ultimate goal of conquering cancer is attainable. However, CML and GIST are quite rare, and in genetic terms, very simple forms of cancer. The BCR-ABL translocation is the principal, if not the sole genetic alteration leading to this disease. This is in contrast to the situation that exists for more prevalent tumors such as those of the lung, breast, colon and others, where dozens of genetic abnormalities (translocations, chromosome duplication, and deletions) are seen. Understandably, these have proven more difficult to treat; however, further insights into the molecular events at work in these more complex tumors will certainly yield improved therapeutic strategies.

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Additional chapters from this book:

Anticancer Gene Therapy by in Vivo DNA Electrotransfer of MBD2 Antisense

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Preclinical and Clinical Studies on 5-Aza-2'-Deoxycytidine, a Potent Inhibitor of DNA Methylation, in Cancer Therapy

Richard L. Momparler

The preclinical and clinical investigations by the author on the antineoplastic activity of 5-Aza-2'-deoxycytidine (5AZA), a potent inhibitor of DNA methylation are reviewed. These include studies o...

DNA Methyltransferase Inhibitors: Paving the Way for Epigenetic Cancer Therapeutics

Gregory K. Reid and A. Robert MacLeod

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The Role of Active Demethylation in Cancer and Its Therapeutic Potential

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This chapter emphasizes that along the chain of events that induce DNA methylation-dependent chromatin condensation, a post-synthetic modification other than histone acetylation, poly(ADP-ribosyl)at...

Regulation of DNA Methyltransferases in Cancer

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The DNA methyltransferases (DNMTs) are critical proteins involved in establishing proper control of epigenetic information. They are responsible for maintaining the cell’s methylation pattern, as we...

Methylation Analysis in Cancer: (Epi)Genomic Fast Track from Discovery to Clinical Routine

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Aberrant DNA methylation is an early and common event in human cancers. Methylation acts as an epigenetic regulator of gene expression and is involved in cancer development as well as resistance to ...

Identifying Clinicopathological Association of DNA Hypermethylation in Cancers Using CpG Island Microarrays

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Hypermethylation of promoter CpG islands has been associated with gene silencing in cancer. Increasingly, these CpG islands have potential clinical utility as molecular markers for cancer diagnosis....

The Loss of Methyl Groups in DNA of Tumor Cells and Tissues: The Immunochemical Approach

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The existence of 5-methyldeoxycytidine (5-MeCyd) has been first demonstrated in 1958.1 For several years the presence of this naturally modified base in DNA remained unexplained and its role was ign...

CpG Island Hypermethylation of Tumor Suppressor Genes in Human Cancer: Concepts, Methodologies and Uses

Michel Herranz and Manel Esteller

Aberrations in the DNA methylation patterns are nowadays recognized as a hallmark of human cancer. One of the most characteristic changes is the hypermethylation of CpG islands of tumor suppressor g...

DNA Methylation in Colorectal Cancer

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DNA Methylation in Urological Cancers

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Urological cancers are a diverse group with different alterations of DNA methylation. In all urological cancers, DNA hypermethylation of specific genes has been described. In contrast, methylation o...

DNA Hypo- vs. Hypermethylation in Cancer: Tumor Specificity, Tumor Progression, and Therapeutic Implications

Melanie Ehrlich and Guanchao Jiang

DNA hypomethylation associated with cancer is probably as frequent as cancer-linked DNA hypermethylation. The hypomethylation of genomic sequences often exceeds hypermethylation so that cancers freq...

Epigenetic Mechanisms of Gene Regulation: Relationships between DNA Methylation, Histone Modification, and Chromatin Structure

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DNA methylation is a post-replicative, or epigenetic, modification of the genome that is critical for proper mammalian embryonic development, gene silencing, X chromosome inactivation, and imprintin...

DNA Methylation: Three Decades in Search of Function

Aharon Razin

DNA methylation is an epigenetic mark that is involved in control mechanisms of a variety of biological processes. Being symmetrically positioned on the two complementary DNA strands the methyl grou...


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