Please use this identifier to cite or link to this item: http://www.arca.fiocruz.br/handle/icict/17840
Title: Biomarkers of genome instability and cancer epigenetics
Authors: Reis, Adriana H. O.
Vargas, Fernando R.
Lemos, Bernardo
Affilliation: Instituto Nacional de Câncer. Programa de Genética. Rio de Janeiro, RJ, Brasil.
Instituto Nacional de Câncer. Programa de Genética. Rio de Janeiro, RJ, Brasil / Universidade Federal do Estado do Rio de Janeiro. Departamento de Biologia molecular e Genética. Rio de Janeiro, RJ, Brasil / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Epidemiologia de Malformações Congênitas. Rio de Janeiro, RJ, Brasil.
Harvard T. H. Chan School of Public Health. Department of Environmental Health. Program in Molecular and Integrative Physiological Sciences. Boston, MA, USA.
Abstract: Tumorigenesis is a multistep process involving genetic and epigenetic alterations that drive somatic evolution from normal human cells to malignant derivatives. Collectively, genetic and epigenetic alterations might be combined into biomarkers for the assessment of risk, the detection of early stage tumors, and accurate tumor characterization before and after treatment. Recent efforts have provided systematic approaches to cancer genomics through the application of massive sequencing of specific tumor types. Here, we review biomarkers of genome instability and epigenetics. Cancer evolvability and adaptation emerge through genetic and epigenetic lesions of a variety of sizes and qualities-from point mutations and small insertions/deletions to large-scale chromosomal rearrangements, alterations in whole chromosome copy number, preferential allelic expression of cancer risk alleles, and mechanisms that increase tumor mutation rates. We also review specific epigenetic mechanisms that facilitate or hinder tumor adaptation, including DNA methylation, histone modification, nucleosome remodeling, transcription factor activity, and small non-coding RNAs. Given the complexity of the carcinogenic process, the challenge ahead will be to interpret disparate signals across hundreds of genes and summarize these signals into a single actionable diagnosis that translates into specific treatments. Another challenge is to refine preventive efforts through the identification of epigenetic processes that mediate increased cancer rates in individuals exposed to sources of toxic environmental stress and pollution, specially through development and early childhood.
Keywords: Epigenetics
Genome instability
Tumorigenesis
Biomarkers
keywords: Epigenética
Biomarcadores
Insuficiência do genoma
Carcinogênese
Issue Date: 2016
Publisher: Springer Verlag (Germany)
Citation: REIS, Adriana H. O.; VARGAS, Fernando R.; LEMOS, Bernardo. Biomarkers of genome instability and cancer epigenetics. Tumor Biol., v.37, n.10, p.13029–13038, Oct. 2016.
DOI: 10.1007/s13277-016-5278-5
ISSN: 1010-4283
Copyright: restricted access
Appears in Collections:IOC - Artigos de Periódicos

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