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Nuclear lncRNAs as epigenetic regulators-beyond skepticism.

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Pervasive transcription produces many noncoding RNAs. Long noncoding RNAs (lncRNAs) in the nucleus may regulate gene expression through epigenetic modifications like histone or DNA changes.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Epigenetics

Background:

  • Systematic transcriptome analysis reveals pervasive transcription across the mammalian genome.
  • Over half of transcribed RNAs are noncoding RNAs (ncRNAs), with unclear physiological roles.
  • Long noncoding RNAs (lncRNAs) are a major class of ncRNAs.

Purpose of the Study:

  • To review the recent advancements in understanding the molecular mechanisms of lncRNAs.
  • To highlight the proposed role of lncRNAs in gene expression regulation.
  • To discuss the involvement of lncRNAs in epigenetic regulation.

Main Methods:

  • This review summarizes existing literature and research findings.
  • Focuses on studies investigating lncRNA function in the nucleus.
  • Integrates findings related to chromatin and epigenetic regulation.

Main Results:

  • A significant portion of the genome is transcribed into various RNA molecules.
  • Long noncoding RNAs (lncRNAs) are increasingly recognized for their regulatory functions.
  • lncRNAs are proposed to regulate gene expression epigenetically via DNA or histone modification.

Conclusions:

  • Long noncoding RNAs play crucial roles in regulating gene expression at the transcriptional level.
  • Epigenetic modifications, including DNA and histone alterations, are key mechanisms mediated by lncRNAs.
  • Further research into lncRNA mechanisms is vital for understanding gene regulation and development.