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miR-24 Inhibits cell proliferation by targeting E2F2, MYC, and other cell-cycle genes via binding to "seedless" 3'UTR

Ashish Lal1, Francisco Navarro, Christopher A Maher

  • 1Immune Disease Institute, Children's Hospital Boston, Department of Pediatrics, Harvard Medical School, MA 02115, USA. alal@idi.harvard.edu

Molecular Cell
|September 15, 2009
PubMed

Insights

MicroRNA-24 (miR-24) controls cell division by regulating E2F2, a key gene in cell-cycle progression. Inhibiting miR-24 promotes cell proliferation, while its overexpression halts it.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • MicroRNA-24 (miR-24) is upregulated during terminal differentiation across various cell types.
  • miR-24 plays a role in regulating cell-cycle progression.

Purpose of the Study:

  • To investigate the role of miR-24 in controlling cell-cycle progression.
  • To identify the direct targets of miR-24 involved in cell-cycle regulation.

Main Methods:

  • Overexpression and antagonism of miR-24 in cell cultures.
  • mRNA sequencing to identify miR-24 downregulated genes.
  • Gene knockdown and rescue experiments to validate targets.

Main Results:

  • miR-24 overexpression increases G1 cell-cycle phase, inhibiting proliferation.
  • miR-24 directly targets and regulates cell-cycle genes, including MYC and E2F2.
  • E2F2 was identified as a critical miR-24 target, mediating its effects on cell proliferation.

Conclusions:

  • miR-24 functions as a key regulator of cell-cycle progression.
  • E2F2 is a critical downstream effector of miR-24 in controlling cell proliferation.
  • miR-24 utilizes non-canonical binding to regulate target gene expression.

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