Abstract
“Nutrigenomics” refers to the ability of nutrients to alter gene expression. Insulin secreting β-cells exhibit genomic and molecular changes that enhance their function when acutely exposed to physiological concentrations of glucose and fatty acids. However, chronic exposure, such as occurs in the hyperlipidemic, hyperglycemic state of obesity/ prediabetes can exert deleterious effects on β-cell function through alteration of gene expression. The genomic underpinnings of so-called glucolipotoxicity on the β-cell and its relationship to development of type 2 diabetes will be discussed in this review article. For example, free fatty acids influence β-cell gene expression by direct interaction with transcription factors such as peroxisome proliferator-activated receptors. Glucose responsive genes include the insulin gene as well as genes involved in β-cell survival and other functions. In addition, obesity is now recognized as a condition of chronic, low-level inflammation. The adipose tissue secretes multiple circulating hormones termed adipokines, and the relationship between these and the β-cell has been termed adipotoxicity. The influence of adipokines on regulation of insulin secretion and β-cell survival will be reviewed.
Keywords: Insulin, β-cell, glucolipotoxicity, adipotoxicity, nutrigenomics
Current Genomics
Title: Nutrigenomics, β-Cell Function and Type 2 Diabetes
Volume: 8 Issue: 1
Author(s): R. Nino-Fong, T. M. Collins and C. B. Chan
Affiliation:
Keywords: Insulin, β-cell, glucolipotoxicity, adipotoxicity, nutrigenomics
Abstract: “Nutrigenomics” refers to the ability of nutrients to alter gene expression. Insulin secreting β-cells exhibit genomic and molecular changes that enhance their function when acutely exposed to physiological concentrations of glucose and fatty acids. However, chronic exposure, such as occurs in the hyperlipidemic, hyperglycemic state of obesity/ prediabetes can exert deleterious effects on β-cell function through alteration of gene expression. The genomic underpinnings of so-called glucolipotoxicity on the β-cell and its relationship to development of type 2 diabetes will be discussed in this review article. For example, free fatty acids influence β-cell gene expression by direct interaction with transcription factors such as peroxisome proliferator-activated receptors. Glucose responsive genes include the insulin gene as well as genes involved in β-cell survival and other functions. In addition, obesity is now recognized as a condition of chronic, low-level inflammation. The adipose tissue secretes multiple circulating hormones termed adipokines, and the relationship between these and the β-cell has been termed adipotoxicity. The influence of adipokines on regulation of insulin secretion and β-cell survival will be reviewed.
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Cite this article as:
Nino-Fong R., Collins M. T. and Chan B. C., Nutrigenomics, β-Cell Function and Type 2 Diabetes, Current Genomics 2007; 8 (1) . https://dx.doi.org/10.2174/138920207780076947
DOI https://dx.doi.org/10.2174/138920207780076947 |
Print ISSN 1389-2029 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5488 |
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