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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.
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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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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
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Epigenetic Control of Gene Function in Enamel Development.

Yi Fan, Yachuan Zhou, Xuedong Zhou

  • 1State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Sichuan, China. zhenglw399@hotmail.com.

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Epigenetic regulations, including microRNA and DNA methylation, are crucial for tooth enamel formation. Understanding these mechanisms offers new avenues for diagnosing and treating enamel defects.

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Area of Science:

  • Developmental Biology
  • Epigenetics
  • Dental Research

Background:

  • Amelogenesis involves complex epithelial-mesenchymal interactions.
  • Enamel defects can arise from subtle disruptions during tooth development.
  • Epigenetic modifications like microRNA, DNA methylation, and chromatin remodeling are key regulators.

Purpose of the Study:

  • To review current research on epigenetic regulation in tooth development.
  • To highlight the role of epigenetics in enamel formation.
  • To explore potential applications in disease marker identification and therapeutics.

Main Methods:

  • Literature review of epigenetic mechanisms in amelogenesis.
  • Analysis of studies on microRNA, DNA methylation, and chromatin modifications.
  • Focus on enamel development and related defects.

Main Results:

  • Epigenetic factors significantly influence the sequential and reciprocal interactions in tooth development.
  • Alterations in epigenetic regulation are linked to enamel defects in shape, color, and structure.
  • Emerging evidence points to epigenetics as a critical layer of control in amelogenesis.

Conclusions:

  • Epigenetic regulation is vital for normal enamel formation.
  • The study of epigenetics in tooth development offers promising diagnostic and therapeutic strategies.
  • Further research into epigenetic mechanisms can lead to novel treatments for enamel-related disorders.