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Related Concept Videos

Gene-Environment Interactions01:20

Gene-Environment Interactions

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...
Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
Genetic Screens02:46

Genetic Screens

Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
Human Genetics01:28

Human Genetics

Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...

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Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
08:09

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Published on: January 7, 2014

Systems genetics: a powerful approach for gene-environment interactions.

Brynn H Voy1

  • 1Department of Animal Science, Institute of Agriculture, University of Tennessee, Knoxville, TN 37996, USA. bhvoy@utk.edu

The Journal of Nutrition
|January 29, 2011
PubMed
Summary

Systems genetics bridges the gap between genetic variation and phenotypic diversity. This approach reveals how genetic differences influence traits, especially in response to diet and environmental changes.

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Area of Science:

  • Genetics
  • Systems Biology
  • Nutritional Science

Background:

  • Genetic variation drives phenotypic diversity, especially under changing environmental or dietary conditions.
  • Genome-wide association studies link genetic variants to phenotypes but lack mechanistic insights.
  • Systems genetics offers a framework to understand the gene-to-phenotype hierarchy.

Purpose of the Study:

  • To elucidate the mechanisms by which genetic variation influences phenotypic diversity.
  • To apply systems genetics to nutrition to understand nutrient-health interactions.
  • To identify individual differences in dietary response mechanisms.

Main Methods:

  • Utilizing systems genetics approaches to analyze complex biological systems.
  • Integrating multi-omics data to map gene-environment-phenotype interactions.
  • Developing models of genetic and molecular networks.

Main Results:

  • Identified key genetic variants contributing to phenotypic variation.
  • Mapped pathways linking nutrients to health outcomes.
  • Characterized molecular mechanisms underlying differential responses to diet.

Conclusions:

  • Systems genetics is crucial for understanding the mechanistic basis of phenotypic diversity.
  • This approach enhances our understanding of nutritional impacts on health.
  • It provides a foundation for personalized nutrition strategies.