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Related Concept Videos

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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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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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Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
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Related Experiment Video

Updated: Jun 25, 2025

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DNA methylation reprogramming in teleosts.

Sébastien Matlosz1, Sigríður R Franzdóttir1, Arnar Pálsson1

  • 1Institute of Life and Environmental Sciences, University of Iceland, Reykjavík, Iceland.

Evolution & Development
|May 24, 2024
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Summary
This summary is machine-generated.

DNA methylation reprogramming is essential for early development. This review examines DNA methylation patterns in teleost fish, comparing them to mammals to understand evolutionary conservation.

Keywords:
DNA methylationepigeneticsevolutionreprogrammingteleosts

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Area of Science:

  • Developmental Biology
  • Epigenetics
  • Comparative Genomics

Background:

  • Early embryonic development relies on precise gene expression control, involving epigenetic modifications like DNA methylation.
  • DNA methylation influences chromatin structure and gene transcription, playing a critical role in cellular state maintenance.
  • Mammals undergo significant DNA methylation reprogramming events during early development and in germ cells.

Purpose of the Study:

  • To review the current understanding of DNA methylation reprogramming in early fish development.
  • To compare DNA methylation reprogramming patterns in teleost fish with those in mammals.
  • To investigate the evolutionary conservation of DNA methylation reprogramming.

Main Methods:

  • Literature review of studies on DNA methylation reprogramming in teleost fish.
  • Analysis of findings considering methodological variations across studies.
  • Comparative analysis of teleost and mammalian DNA methylation reprogramming patterns.

Main Results:

  • Teleost fish exhibit diverse DNA methylation reprogramming patterns.
  • Methodological differences impact the interpretation of reprogramming patterns in fish.
  • Comparisons reveal both conserved and lineage-specific aspects of DNA methylation reprogramming.

Conclusions:

  • Understanding DNA methylation reprogramming in teleosts is crucial for evolutionary insights.
  • Further research is needed to fully elucidate the conservation of these epigenetic processes.
  • Teleost fish offer a valuable model for studying the evolution of developmental epigenetics.