Type 2 Diabetes Mellitus Clinical Trial
Official title:
Impact of Metabolic Health on Sperm Epigenetic Marks in Humans
This study is designed to evaluate whether epigenetic markers in overweight men with type 1 diabetes (T1D) or type 2 diabetes (T2D) can be improved with a 3 month lifestyle intervention or program focused in glycemic intervention.
Parental history of diabetes confers substantial individual risk for development of obesity and diabetes. Obesity risk can be transmitted across generations, from parents or grandparents to children. Genomic variation explains only a portion of this risk. Epigenetic modulation through DNA methylation, histone modification, or by noncoding RNAs, provide mechanisms to regulate gene activity independent of DNA sequence by determining which genes are turned on or off in response to environment or disease. Epigenetic changes can be stable over the lifespan providing a mechanism through which environmental exposures may impart long-term effects on gene expression and phenotypic outcome. The maternal intrauterine environment is now well recognized to modify obesity and T2D disease risk of offspring. Fetuses carried by women who are obese, have diabetes, or suffer from suboptimal nutrition are at increased risk of insulin resistance, obesity, T2D, and cardiovascular disease risk as adults. Studies in rodents also show that the health, metabolism, and prior environmental exposures of the male can also influence health of his offspring. Existing data provide powerful support for the hypothesis that current glucose levels and overall metabolic health of males can alter epigenetic marks in sperm and suggest a novel modifiable mechanism of transmission. However, much less is known about how human sperm epigenetic patterns change with nutritional and metabolic health, and whether these may ultimately impart differences in health of future generations. Thus, we are studying the impact of both type 1 and type 2 diabetes, and elevations in glucose common to both conditions, on human reproductive health and the sperm epigenome. ;
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