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Related Experiment Videos

Natural antisense transcripts: sound or silence?

Andreas Werner1, Ariane Berdal

  • 1Institute for Cell and Molecular Biosciences, University of Newcastle upon Tyne, Newcastle, United Kingdom. andreas.werner@ncl.ac.uk

Physiological Genomics
|October 19, 2005
PubMed
Summary
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Naturally occurring antisense RNAs, arising from overlapping genes, show regulatory potential beyond gene knockdown. While some are linked to specific gene expression patterns, many remain speculative.

Area of Science:

  • Molecular Biology
  • Genetics
  • Gene Regulation

Background:

  • Antisense RNA gained prominence with the advent of short interfering RNAs for gene knockdown.
  • The concept of RNA's regulatory potential is now widely accepted.
  • Computational studies reveal overlapping gene pairs producing sense and antisense RNAs in mammals.

Purpose of the Study:

  • To explore the regulatory role of endogenous antisense transcripts.
  • To investigate the physiological consequences of antisense transcription from bidirectionally transcribed genes.

Main Methods:

  • Analysis of computational studies on gene overlap and antisense transcription.
  • Review of recent reports on antisense transcript function.
  • Examination of known examples of antisense-mediated gene regulation.

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Main Results:

  • 15-25% of mammalian genes overlap, generating sense-antisense RNA pairs.
  • Antisense transcripts can interfere with RNA processing, suggesting gene regulation.
  • A subset of antisense transcripts is associated with monoallelic gene expression (imprinting, X inactivation, immune cell expression).

Conclusions:

  • Endogenous antisense RNAs represent a significant, naturally occurring gene regulatory mechanism.
  • While some antisense RNAs have defined roles, the function of many others remains largely speculative.
  • Further research is needed to elucidate the mechanisms and physiological impact of antisense transcription in bidirectionally transcribed genes.