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Genes & Nutrition

, Volume 2, Issue 1, pp 67–70 | Cite as

Overview of genes, diet and cancer

  • J. C. MathersEmail author
Proceedings

Abstract

Quantitative epidemiological analysis suggests that about one third of the variation in cancer risk can be attributed to variation in dietary exposure but it has proved difficult, using conventional epidemiological approaches, to identify which dietary components, in what amounts and over what time-scales are protective or potentially hazardous. Work in this area has been hampered by the lack of robust surrogate endpoints. However, the rapidly accumulating knowledge of the biological basis of cancer and the application of post-genomic technologies are helping the development of novel biomarkers of cancer risk. Genomic damage resulting in aberrant gene expression is the fundamental cause of all cancers. Such damage includes mutations, aberrant epigenetic marking, chromosomal damage and telomere shortening. Since both external agents and normal cell functions, such as mitosis, subject the genome to frequent and diverse insults, the human cell has evolved a battery of defence mechanisms which (a) attempt to minimize such damage (including inhibition of oxidative reactions by free radical scavenging and the detoxification of potential mutagens), (b) repair the damage or (c) remove severely damaged cells by shunting them into apoptosis. When such defences fail and a tumour becomes established, further genomic damage and further alterations in gene expression enable the tumour to grow, to cope with anoxia, to develop a novel blood supply (angiogenesis), to escape from the confines of its initiation site and to establish colonies elsewhere in the body (metastasis). All of these processes are potentially modifiable by food components and by nutritional status. In addition, interactions between dietary (and other environmental and lifestyle) factors and genetic make-up [seen principally in the assembly of single nucleotide polymorphisms (SNPs) which is unique to each individual] contributes to interindividual differences in cancer risk.

Keywords

Cancer Gene expression Diet Biomarkers Epigenetics 

Notes

Acknowledgments

Research in my laboratory on prevention of cancer is funded by the Medical Research Council [G0100496], the Biotechnology and Biological Sciences Research Council [D20173] and the Food Standards Agency [N12009, N12015].

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Human Nutrition Research Centre, School of Clinical Medical Sciences, William Leech BuildingUniversity of NewcastleNewcastle upon TyneUK

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