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Updated: Jan 8, 2026

Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
08:43

Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation

Published on: May 31, 2016

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TIMP3 attenuates vascular calcification by restoring autophagy in vascular smooth muscle cells through the

Yu Liu1, Beidi Sun2, Jie Yang1

  • 1Department of Cardiology, Guangxi Hospital Division of the First Affiliated Hospital, Sun Yat-sen University, Nanning, 530022, Guangxi, China.

Biochemical and Biophysical Research Communications
|December 18, 2025
PubMed
Abstract

Insights

Tissue inhibitor of metalloproteinases-3 (TIMP3) reduces vascular calcification by enhancing autophagy and inhibiting the STAT1/FOXO1 pathway. This finding suggests TIMP3 as a potential therapeutic target for chronic kidney disease (CKD) complications.

Area of Science:

  • Cardiovascular Biology
  • Cellular Biology
  • Molecular Medicine

Background:

  • Vascular calcification, a hallmark of cardiovascular disease, involves abnormal mineral deposition in blood vessels, particularly in chronic kidney disease (CKD).
  • Autophagy, a cellular self-degradation process, plays a role in preventing vascular smooth muscle cell (VSMC) calcification.
  • The specific role and molecular mechanisms of Tissue Inhibitor of Metalloproteinases-3 (TIMP3) in vascular calcification are not well understood.

Purpose of the Study:

  • To investigate the role of TIMP3 in vascular calcification.
  • To elucidate the molecular mechanisms by which TIMP3 influences VSMC calcification and autophagy.
  • To assess the therapeutic potential of TIMP3 in a CKD-induced vascular calcification model.

Main Methods:

  • Utilized a chronic kidney disease (CKD) mouse model and beta-glycerophosphate (β-GP)-induced VSMCs.
  • Assessed vascular calcification using von Kossa and Alizarin Red S staining, and quantified calcium levels.
  • Evaluated autophagy flux via LC3 immunofluorescence and Western blotting; investigated the STAT1/FOXO1 signaling pathway.

Main Results:

  • TIMP3 expression was decreased in calcified arteries and VSMCs.
  • TIMP3 overexpression attenuated calcification, reduced Runx2, and enhanced autophagy flux.
  • TIMP3 suppressed STAT1 activation and restored FOXO1, indicating the STAT1/FOXO1 pathway mediates its protective effects.
  • In vivo, TIMP3 overexpression reduced aortic calcification and enhanced autophagy in CKD mice.

Conclusions:

  • TIMP3 attenuates vascular calcification by restoring autophagy and inhibiting VSMC osteogenic transformation via the STAT1/FOXO1 pathway.
  • These findings identify TIMP3 as a potential therapeutic target for vascular calcification in CKD.
  • TIMP3's role in regulating autophagy and VSMC phenotype offers new insights into cardiovascular pathophysiology.
Keywords:
AutophagyCalcificationFOXO1STAT1TIMP3

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