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Related Experiment Videos

Spreading silence with Sid.

Peter van Roessel1, Andrea H Brand

  • 1The Wellcome Trust/Cancer Research UK Gurdon Institute and Department of Genetics, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK.

Genome Biology
|February 5, 2004
PubMed
Summary
This summary is machine-generated.

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RNA interference (RNAi) spreads between cells in some organisms but not others. A newly identified membrane channel, encoded by the sid-1 gene, is responsible for this cell-to-cell RNAi spreading.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • RNA interference (RNAi) is a gene silencing mechanism.
  • Cell-to-cell spreading of RNAi is observed in plants and C. elegans, but not in Drosophila.
  • The mechanism for RNAi spreading has remained unclear.

Purpose of the Study:

  • To investigate the molecular basis of RNAi cell-to-cell spreading.
  • To identify genes involved in the systemic movement of RNAi.

Main Methods:

  • Utilizing genetic screens in Caenorhabditis elegans.
  • Analyzing gene knockouts and their effect on RNAi systemic movement.
  • Investigating the function of candidate genes in RNAi transport.

Main Results:

Related Experiment Videos

  • A specific gene, sid-1, was identified as crucial for RNAi spreading.
  • The sid-1 gene encodes a transmembrane channel protein.
  • Loss of sid-1 function abolished systemic RNAi in C. elegans.

Conclusions:

  • The sid-1 gene product is essential for the cell-to-cell movement of RNAi.
  • This finding provides a molecular explanation for the organism-specific differences in RNAi spreading.
  • sid-1 represents a potential target for manipulating RNAi efficacy.