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Updated: Feb 21, 2026
05:47
Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
Published on: May 10, 2021
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Autophagy negatively regulates pro-osteogenic activity in human aortic valve interstitial cells
Xin-Sheng Deng1, Xianzhong Meng1, Neil Venardos1
1Department of Cardiothoracic Surgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
The Journal of Surgical Research
|October 8, 2017
Summary
Autophagy, a cellular process, negatively regulates bone formation in aortic valve cells. Enhancing autophagy may prevent calcific aortic valve disease progression.
Area of Science:
- Cell Biology
- Physiology
- Biochemistry
Background:
- Autophagy is crucial for cellular homeostasis.
- Aortic valve interstitial cells (AVICs) exhibit pro-osteogenic activity under stress.
- The role of autophagy in regulating AVIC pro-osteogenesis is investigated.
Purpose of the Study:
- To determine if autophagy prevents or regulates pro-osteogenic activity in AVICs.
- To elucidate the molecular mechanisms linking autophagy and osteogenesis in the aortic valve.
Main Methods:
- AVICs isolated from human aortic valves.
- Autophagy activity assessed using chemical inhibitors and genetic manipulation (Atg7 gene).
- Pro-osteogenic markers (BMP-2, ALP) and calcium deposition quantified.
Main Results:
- Normal AVICs show higher autophagy (lower LC3-II) than calcified AVICs.
- Autophagy suppression induced BMP-2/ALP expression and calcium deposition in normal AVICs.
- Autophagy upregulation reduced BMP-2/ALP in diseased AVICs.
Conclusions:
- Autophagy negatively regulates pro-osteogenic activity in human AVICs.
- Upregulating autophagy may offer a therapeutic strategy against calcific aortic valve disease.
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