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Epigenetic Regulation01:37

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
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Sample Preparation to Bioinformatics Analysis of DNA Methylation: Association Strategy for Obesity and Related Trait Studies
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[DNA methylation in obesity].

Małgorzata Pokrywka1, Beata Kieć-Wilk2, Anna Polus3

  • 1Ośrodek Badań Genetycznych i Nutrigenomiki, Małopolskie Centrum Biotechnologii, Uniwersytet Jagielloński.

Postepy Higieny I Medycyny Doswiadczalnej (Online)
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Summary

Obesity rates are rising globally, increasing risks for chronic diseases. This review explores how epigenetic changes, like DNA methylation, influence obesity development and related health issues.

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Area of Science:

  • Metabolic health and disease
  • Genetics and epigenetics
  • Public health and epidemiology

Background:

  • Rising global rates of overweight and obesity pose significant public health challenges.
  • Obesity is a major risk factor for serious health conditions including diabetes, cardiovascular disease, and cancer, leading to premature mortality.
  • Obesity arises from complex interactions between genetic predispositions and environmental influences such as diet and physical activity levels.

Purpose of the Study:

  • To review the current understanding of epigenetic modifications in the context of obesity.
  • To specifically examine the role of DNA methylation alterations in obesity and its associated complications.
  • To highlight the impact of non-genetic factors on gene expression related to metabolic health.

Main Methods:

  • Literature review of scientific publications on obesity, epigenetics, and DNA methylation.
  • Analysis of studies investigating epigenetic mechanisms, including DNA methylation, histone modifications, and micro-RNA synthesis.
  • Synthesis of findings linking epigenetic changes to the development and progression of obesity.

Main Results:

  • Epigenetic changes, particularly DNA methylation, are increasingly recognized as crucial factors in obesity.
  • Alterations in DNA methylation patterns can affect gene expression related to appetite regulation, energy metabolism, and fat storage.
  • These epigenetic modifications are influenced by environmental factors and may contribute to the heritability of obesity across generations.

Conclusions:

  • Epigenetic mechanisms, especially DNA methylation, play a significant role in the pathogenesis of obesity.
  • Understanding these epigenetic factors offers potential new avenues for obesity prevention and treatment strategies.
  • Further research into the interplay of genetics, environment, and epigenetics is essential for combating the obesity epidemic.