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Decoding Lamarck-transgenerational control of metabolism by noncoding RNAs.

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Summary

Epigenetic transgenerational inheritance (ETI) shows parental experiences can influence offspring traits beyond genetics. Small and long non-coding RNAs in sperm may mediate this non-genetic heredity.

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Area of Science:

  • Epigenetics
  • Genetics
  • Developmental Biology

Background:

  • Epigenetic transgenerational inheritance (ETI) proposes that parental experiences can alter offspring phenotypes independently of DNA sequence changes.
  • Once dismissed as Lamarckian inheritance, ETI has gained attention due to population and animal studies.
  • This concept challenges traditional Mendelian genetics by suggesting non-genetic information transfer across generations.

Purpose of the Study:

  • To review current knowledge on ETI across diverse organisms, including humans.
  • To explore the epigenetic mechanisms potentially responsible for this nongenetic inheritance.
  • To highlight the role of non-coding RNAs in transmitting environmental information across the germline.

Main Methods:

  • Literature review of population studies and controlled experiments in syngenic animals.
  • Analysis of epigenetic principles potentially underlying ETI.
  • Focus on the role of small and long non-coding RNAs in male gametes.

Main Results:

  • ETI is supported by evidence from various organisms and human cohorts.
  • Epigenetic mechanisms, particularly non-coding RNAs, are implicated in mediating ETI.
  • Male gametes' non-coding RNAs act as sensors of metabolic states, relaying environmental cues.

Conclusions:

  • Parental experiences can induce heritable epigenetic changes affecting progeny phenotypes.
  • Non-coding RNAs in sperm are key mediators, translating environmental signals into heritable epigenetic modifications.
  • ETI offers a new perspective on heredity, complementing Mendelian genetics.