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Related Concept Videos

Epigenetic Regulation01:37

Epigenetic Regulation

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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.
X-chromosome...
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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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Parenteral Nutrition (PN) delivers essential nutrients directly into the bloodstream, bypassing the digestive system. It is commonly used for individuals with severe digestive disorders or conditions that prevent normal nutrient absorption.
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Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
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Epigenetics and neonatal nutrition.

Umberto Simeoni1, Catherine Yzydorczyk1, Benazir Siddeek1

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Early life environmental exposures can cause lasting epigenetic changes, influencing gene expression and adult non-communicable disease risk. This review covers epigenetics and developmental programming of human health.

Keywords:
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Area of Science:

  • Developmental biology
  • Genetics
  • Environmental health

Background:

  • Epigenetic modifications influence gene expression with long-lasting effects.
  • Early development (pre-conception to infancy) is a critical window for epigenetic DNA imprinting.
  • Epigenetic changes are linked to altered risk for adult non-communicable diseases.

Purpose of the Study:

  • To review the molecular basis of epigenetics.
  • To discuss environmental influences on epigenetic modifications during early development.
  • To explore the role of epigenetic changes in developmental programming of human health.

Main Methods:

  • Literature review of epigenetic mechanisms.
  • Analysis of studies linking early-life environment to epigenetic modifications.
  • Synthesis of research on epigenetics and non-communicable disease risk.

Main Results:

  • Epigenetic changes are dynamic and responsive to environmental factors during critical developmental periods.
  • These modifications can alter susceptibility to cardiovascular, metabolic, and reproductive diseases later in life.
  • Developmental programming via epigenetics impacts multiple facets of adult health.

Conclusions:

  • Understanding epigenetic mechanisms is crucial for preventing environmentally induced diseases.
  • Interventions during early development may mitigate long-term health risks.
  • Epigenetics plays a key role in mediating environmental influences on human health outcomes.