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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.

Epigenetic Regulation

Epigenetic Regulation

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

Human Genetics

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...

Genomic Imprinting and Inheritance

Genomic Imprinting and Inheritance

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.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...

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...

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Epigenetics in disease: leader or follower?

David I K Martin¹, Jennifer E Cropley, Catherine M Suter

¹Childrens Hospital Oakland Research Institute, Oakland, CA, USA.

|June 2, 2011

Summary

Epigenetic errors, or epimutations, can cause disease by altering gene activity. These epigenetic diseases often show variable symptoms and complex inheritance, unlike typical genetic disorders.

Area of Science:

Genetics
Molecular Biology
Developmental Biology

Background:

Epigenetic silencing is crucial for cell differentiation in eukaryotes.
Errors in epigenetic maintenance (epimutations) can lead to disease.
Epimutations may explain phenotypic variation and common diseases.

Purpose of the Study:

To explore the role of epimutations in causing human diseases.
To understand the complex inheritance patterns of epigenetic diseases.
To highlight the challenges in distinguishing causal epigenetic aberrations from disease consequences.

Main Methods:

Review of existing literature on epigenetic regulation and disease.
Analysis of molecular mechanisms underlying epimutations.

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Discussion of challenges in epigenetic research.

Main Results:

Epimutations can phenocopy genetic diseases when occurring early in development.
Epigenetic diseases are predicted to be mosaic and non-Mendelian.
Current examples of epigenetic diseases are limited due to diagnostic challenges.

Conclusions:

Epigenetic variation and aberration likely contribute significantly to human disease.
Distinguishing causal epigenetic factors from disease effects is challenging.
Advances in epigenome characterization may revolutionize understanding of epigenetic diseases.