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Related Experiment Video

Updated: Mar 13, 2026

Techniques to Induce and Quantify Cellular Senescence

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

RNA interference is essential for cellular quiescence.

B Roche¹, B Arcangioli², R A Martienssen³

¹Howard Hughes Medical Institute-Gordon and Betty Moore Foundation, Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.

Science (New York, N.Y.)

|October 15, 2016

Summary

This summary is machine-generated.

RNA interference (RNAi) is essential for cell cycle quiescence (G0 phase) in fission yeast. RNAi mutants exhibit G0 entry defects and reduced viability, highlighting RNAi

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Area of Science:

Cell Biology
Molecular Biology
Genetics

Background:

Quiescent cells (G0 phase) are crucial for organismal development and survival.
The role of RNA interference (RNAi) in regulating cell cycle quiescence remains largely unexplored.
Understanding cell cycle regulation is fundamental to developmental biology and disease research.

Purpose of the Study:

To investigate the requirement of RNA interference (RNAi) for cell quiescence in Schizosaccharomyces pombe.
To identify genetic suppressors of RNAi-related G0 phase defects.
To elucidate the molecular mechanisms by which RNAi influences cell cycle progression and quiescence.

Main Methods:

Genetic screening to identify suppressors of G0 defects in Dicer (dcr1Δ) mutants.
Analysis of cell viability and cell cycle progression in RNAi-deficient fission yeast.
Investigation of gene expression patterns and chromatin modifications related to RNA polymerase activity.

Main Results:

RNA interference (RNAi) is essential for maintaining cell viability during G0 entry and long-term quiescence.
Mutants lacking Dicer (dcr1Δ) show significant defects in G0 entry and maintenance.
Suppression analysis identified genes involved in chromosome segregation, RNA polymerase regulation, and heterochromatin formation.

Conclusions:

RNAi promotes cell cycle quiescence by regulating RNA polymerase release.
RNA polymerase II release facilitates heterochromatin formation at centromeres for proper chromosome segregation.
RNA polymerase I release prevents heterochromatin formation at ribosomal DNA, crucial for quiescence maintenance.