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A context-specific circadian clock in adipocyte precursor cells modulates adipogenesis.

Yunshin Jung1, Brian J Feldman1,2

  • 1a Department of Pediatrics/Endocrinology , Stanford University School of Medicine , Stanford , CA , USA.

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Summary

The circadian clock in fat cells is crucial for metabolism. Researchers discovered the Period 3 (Per3) gene regulates adipogenesis via the Klf15 gene in adipocyte precursor cells.

Keywords:
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Area of Science:

  • * Molecular biology
  • * Chronobiology
  • * Adipose tissue biology

Background:

  • * The body possesses a central circadian clock in the brain and peripheral clocks in most cells.
  • * Peripheral clocks integrate central signals with tissue-specific cues, influencing metabolism.
  • * While liver circadian clocks are well-studied, the role of circadian clocks in adipose tissue remains unclear.

Purpose of the Study:

  • * To investigate the components and function of the circadian clock in mouse adipocyte precursor cells (APCs).
  • * To identify key circadian genes and their regulatory pathways in APCs.
  • * To understand the impact of the APC circadian clock on adipogenesis and metabolism.

Main Methods:

  • * Isolation and culture of primary mouse APCs.
  • * Molecular analysis of circadian clock gene expression.
  • * Investigation of gene regulatory networks using techniques like gene silencing and reporter assays.
  • * Assessment of adipogenesis in APCs under different conditions.

Main Results:

  • * Identified key components of the circadian clock within primary mouse APCs.
  • * Discovered a significant role for the circadian gene Period 3 (Per3) in APCs.
  • * Elucidated that Per3 directly regulates Kruppel-like factor 15 (Klf15) expression.
  • * Demonstrated that the Per3-Klf15 pathway controls adipogenesis in APCs.

Conclusions:

  • * The circadian clock in APCs plays a vital role in regulating adipogenesis.
  • * The Per3-Klf15 pathway is a novel clock-output mechanism in adipose tissue.
  • * Findings offer insights into adipose tissue biology and metabolism, potentially leading to new therapeutic strategies.