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

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Reduced PRC2 function alters male germline epigenetic programming and paternal inheritance.

Jessica M Stringer1,2, Samuel C Forster3,4,5, Zhipeng Qu6

  • 1Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Victoria, 3168, Australia.

BMC Biology
|September 22, 2018
PubMed
Summary

Polycomb Repressive Complex 2 (PRC2) is crucial for transmitting epigenetic information from fathers to offspring. Impaired PRC2 function in male mice affects fertility and offspring development, impacting disease heredity.

Keywords:
Epigenetic reprogrammingFertilityGermlineH3K27me3PRC2Paternal inheritance

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Area of Science:

  • Epigenetics and Developmental Biology
  • Reproductive Biology
  • Genetics and Genomics

Background:

  • Understanding epigenetic inheritance is key to deciphering disease heredity.
  • Molecular mechanisms governing germline epigenetic regulation and transmission are not well understood.

Purpose of the Study:

  • To investigate the role of Polycomb Repressive Complex 2 (PRC2) in paternal epigenetic inheritance.
  • To elucidate the molecular pathways involved in germline epigenetic transmission.

Main Methods:

  • Utilized mouse models with reduced PRC2 function.
  • Analyzed epigenetic and transcriptional control in male germ cells.
  • Assessed offspring development, including retrotransposed element expression, cleavage rates, and cell cycle control.

Main Results:

  • Reduced PRC2 function in male mice led to sub-fertility.
  • Altered epigenetic and transcriptional control of retrotransposed elements was observed in foetal germ cells.
  • Offspring exhibited over-expression of retrotransposed pseudogenes and abnormal preimplantation development.

Conclusions:

  • Polycomb Repressive Complex 2 (PRC2) plays a significant role in paternal intergenerational epigenetic transmission.
  • PRC2 influences the epigenetic control of retrotransposed elements during germline transmission.
  • Findings have implications for understanding the inheritance of diseases influenced by epigenetic factors.