Rhythmic expression of miR‐27b‐3p targets the clock gene Bmal1 at the posttranscriptional level in the mouse liver

Feb 28, 2016FASEB journal : official publication of the Federation of American Societies for Experimental Biology

Daily changes of miR-27b-3p control the clock gene Bmal1 after RNA is made in mouse liver

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Abstract

MiR-27b-3p exhibits rhythmic expression in the metabolic tissues of mice subjected to constant darkness.

  • MiR-27b-3p's expression is induced in the livers of unfed and ob/ob mice.
  • The oscillation phases of miR-27b-3p can be reversed by restricted feeding.
  • Bioinformatics analysis indicates that Bmal1 may be a direct target of miR-27b-3p.
  • Luciferase reporter assays demonstrate that miR-27b-3p suppresses Bmal1 activity in a dose-dependent manner.
  • Overexpression of miR-27b-3p reduces the protein levels of BMAL1 and disrupts its rhythmicity.

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