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A transcriptome-wide analysis in mice found that a protein-restricted (PR) diet during gestation resulted in differential gene expression in approximately 1% of the fetal genes analyzed (235/22,690). Specifically, increased expression was seen in genes involved in the p53 pathway, apoptosis , negative regulators of cell metabolism, and genes ...
Methylation generally switches genes “off.” By closely examining the methylation in specific cells or tissues, epigenetic clocks can estimate biological age. Investigating the impact of diet ...
All life on Earth is influenced by the different flows of its environment, yet in humans, different environmental conditions such as poverty, alcohol, stress, malnutrition, exposure to pollutants, man-made chemicals, and synthetic drugs can lead to epigenetic-related illnesses/diseases with certain disease-specific genes typically being activated or deactivated. [12]
Nutritional genomics, also known as nutrigenomics, is a science studying the relationship between human genome, human nutrition and health. People in the field work toward developing an understanding of how the whole body responds to a food via systems biology, as well as single gene/single food compound relationships.
The group has now developed a custom methylation array to allow targeted investigation of the ICRs of the human imprintome [15]]. The availability of this research tool will be useful in determining the contribution of imprinted genes to human health, and to diseases and disorders such as Alzheimer’s disease. [16]
Humans have displayed evidence of epigenetic changes such as DNA methylation, differentiation in expression, and histone modification due to environmental exposures. Carcinogen development in humans has been studied in correlation to environmental inducements such as chemical and physical exposures and their transformative abilities on epigenetics.
Of the 43 genes, 3 of the genes experiencing reduced methylation levels were directly correlated with increased survival of breast cancer. The gene L3MBTL1, a known tumor suppressor, had methylation levels decreased by 1.48% in the exercise group while the limited exercise control group experienced a 2.15% increase in methylation. [28]
Accordingly, transcriptional repression of DNMT1 in response to long-term stress-mimicking exposure causes decreased DNA methylation, which is a marker of gene activation. In particular, there is decreased methylation of a gene called fkbp5, which plays a role in stress response as a glucocorticoid-responsive gene. Thus, chronic stress may ...