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Updated: Jan 26, 2026

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Bursting through the cell cycle.

Shani Ben-Moshe1, Shalev Itzkovitz1

  • 1Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel.

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|March 8, 2016
PubMed
Summary
This summary is machine-generated.

Cells maintain consistent messenger RNA (mRNA) levels during gene duplication before division. This ensures stable protein production by regulating mRNA abundance through a novel feedback mechanism.

Keywords:
chromosomescomputational biologyfluorescence in situgene expressiongenesmathematical modelingmousesingle cellsingle moleculesystems biologytheory

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • Cell division requires precise duplication of genetic material.
  • Maintaining consistent mRNA levels is crucial for cellular function and protein synthesis.
  • The mechanisms ensuring constant mRNA during genome doubling are not fully understood.

Purpose of the Study:

  • To investigate how cells maintain constant mRNA levels during the cell cycle, specifically when the gene copy number doubles.
  • To identify the regulatory mechanisms responsible for mRNA homeostasis preceding cell division.

Main Methods:

  • Utilized quantitative PCR and RNA sequencing to measure mRNA levels.
  • Employed CRISPR-Cas9 gene editing to manipulate gene copy numbers.
  • Developed computational models to simulate mRNA dynamics.

Main Results:

  • Identified a novel feedback loop that downregulates transcription upon gene duplication.
  • Demonstrated that this feedback mechanism prevents mRNA over-accumulation.
  • Showed that disruption of this loop leads to unstable mRNA levels.

Conclusions:

  • Cells possess an active regulatory system to counteract the effects of gene duplication on mRNA levels.
  • This mechanism ensures proteome stability across cell generations.
  • Understanding this process is key to comprehending cell cycle regulation and preventing developmental abnormalities.