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Related Concept Videos

Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Epigenetic Regulation01:37

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 Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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 DNA...
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...
Position-effect Variegation02:32

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

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Related Experiment Video

Updated: May 7, 2026

Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues
13:03

Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues

Published on: June 3, 2016

Generating different epigenotypes.

Maria-Elena Torres-Padilla1

  • 1Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM U964, U de S, F-67404 Illkirch, CU de Strasbourg, France.

Reproductive Biomedicine Online
|October 2, 2013
PubMed
Summary
This summary is machine-generated.

Early embryonic development in metazoans involves crucial chromatin remodeling and epigenetic reprogramming for cell totipotency. Distinctive chromatin features in early embryos likely underpin their transient plasticity and developmental potential.

Keywords:
chromatinembryoepigenesismethylationreprogramming

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Area of Science:

  • Developmental Biology
  • Epigenetics
  • Cellular Plasticity

Background:

  • Embryonic development, unique to metazoans, begins with fertilization and requires extensive chromatin remodeling and epigenetic reprogramming.
  • This reprogramming reverts gametes to a totipotent state, essential for initiating a new developmental program with high efficiency.
  • The early embryonic period is critical for genome reprogramming, enabling the plasticity needed to form all cell types.

Purpose of the Study:

  • To investigate the underlying mechanisms of cell plasticity during early embryogenesis.
  • To understand why the capacity for reprogramming somatic nuclei decreases as embryonic development progresses.
  • To explore the hypothesis that distinctive chromatin features in early embryos are responsible for their plasticity.

Main Methods:

  • Review of recent findings on chromatin remodeling and epigenetic reprogramming in early embryogenesis.
  • Analysis of the transient nature of cellular plasticity and reprogramming capacity in developing embryos.
  • Discussion of the role of specific chromatin features in supporting developmental plasticity.

Main Results:

  • Fertilization triggers intense chromatin remodeling and epigenetic reprogramming for totipotency.
  • The ability of early embryonic cells to reprogram somatic nuclei is transient and diminishes with development.
  • Distinctive chromatin features are proposed as the basis for early embryonic plasticity.

Conclusions:

  • Understanding the chromatin basis of early embryonic plasticity is key to unlocking secrets of cell plasticity, development, and reprogramming.
  • The transient nature of this plasticity highlights critical developmental windows.
  • Further research into these chromatin features could have significant implications for developmental biology and regenerative medicine.