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Gene-Environment Interactions

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...

Epigenetic Regulation

Epigenetic Regulation

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...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

Background and Environment Affect Phenotype

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.
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Types of Toxins

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Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
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Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance

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Published on: August 18, 2023

Environmental epigenetics in metal exposure.

Ricardo Martinez-Zamudio¹, Hyo Chol Ha

¹Department of Biochemistry and Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC, USA.

|May 26, 2011

Summary

Chronic exposure to carcinogenic metals like arsenite, nickel, chromium, and cadmium may cause cancer through epigenetic changes, not just genetic mutations. These environmental exposures can lead to heritable gene expression alterations, influencing disease development.

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A Rat Methyl-Seq Platform to Identify Epigenetic Changes Associated with Stress Exposure

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Published on: October 24, 2018

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Last Updated: Jun 1, 2026

Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance

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Published on: August 18, 2023

A Rat Methyl-Seq Platform to Identify Epigenetic Changes Associated with Stress Exposure

A Rat Methyl-Seq Platform to Identify Epigenetic Changes Associated with Stress Exposure

Published on: October 24, 2018

Area of Science:

Environmental toxicology
Molecular biology
Cancer research

Background:

Chronic exposure to metals such as arsenite, nickel, chromium, and cadmium is linked to increased cancer incidence.
The precise molecular mechanisms of metal-induced cell transformation are not fully understood.
Carcinogenic metals are generally weak mutagens, suggesting non-genetic pathways are involved.

Purpose of the Study:

To review recent advances in understanding how metal exposure affects epigenetic marks.
To discuss the establishment of heritable gene expression in metal-induced carcinogenesis.

Main Methods:

Literature review of recent scientific advances.
Analysis of studies on environmental metal exposure and epigenetic modifications.
Discussion of molecular mechanisms linking epigenetics to carcinogenesis.

Main Results:

Environmental metal exposure significantly alters epigenetic marks.
These epigenetic changes can lead to heritable alterations in gene expression.
Epigenetic modifications represent a potential key mechanism in metal-induced carcinogenesis.

Conclusions:

Epigenetic dysregulation is a critical factor in metal-induced cancer development.
Understanding these mechanisms can inform strategies for cancer prevention and treatment.
Further research into heritable epigenetic changes is crucial for understanding long-term health effects of metal exposure.