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Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
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Activation of peroxisome proliferator-activated receptor γ inhibits vascular calcification by upregulating Klotho

Lijuan Cheng1, Lei Zhang1, Jun Yang2

  • 1Department of Nephrology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.

Experimental and Therapeutic Medicine
|March 30, 2017
PubMed

Insights

Peroxisome proliferator-activated receptor (PPAR) γ activation inhibits vascular smooth muscle cell calcification by increasing Klotho expression. This pathway is crucial for managing mineral metabolism in chronic kidney disease patients.

Area of Science:

  • Nephrology
  • Cardiovascular Biology
  • Molecular Biology

Background:

  • Cardiovascular diseases are prevalent in chronic kidney disease (CKD) patients.
  • Vascular smooth muscle cell (VSMC) calcification, driven by mineral imbalance, is a key complication.
  • Klotho, an aging suppressor, is linked to vascular calcification.

Purpose of the Study:

  • To investigate if peroxisome proliferator-activated receptor (PPAR) γ regulates VSMC calcification via Klotho modulation.
  • To explore the therapeutic potential of PPARγ agonists in managing VSMC calcification.

Main Methods:

  • Induction of VSMC calcification using inorganic phosphate (Pi).
  • Assessment of PPARγ and Klotho expression levels.
  • Treatment with PPARγ agonists and Klotho knockdown using RNA interference.
  • Measurement of Pi transporter 1/2 expression and Pi influx.

Main Results:

  • PPARγ expression decreased during Pi-induced VSMC calcification.
  • PPARγ agonists inhibited calcification and increased Klotho expression in a PPARγ-dependent manner.
  • Klotho knockdown abolished the inhibitory effect of PPARγ activation on VSMC calcification.
  • Both Klotho and PPARγ activation reduced Pi transporter expression and Pi influx.

Conclusions:

  • PPARγ activation inhibits VSMC calcification by upregulating Klotho expression.
  • This study establishes a novel mechanism linking PPARγ, Klotho, and mineral metabolism in vascular calcification.
  • Targeting the PPARγ-Klotho axis may offer a therapeutic strategy for cardiovascular complications in CKD.

Keywords:
Klothoinorganic phosphate transporter 1/2peroxisome proliferator-activated receptor γvascular smooth muscle cell calcification

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