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Updated: Feb 11, 2026
08:55
Isolation and Characterization of Primary Rat Valve Interstitial Cells: A New Model to Study Aortic Valve Calcification
Published on: November 20, 2017
10.3K
Coupled OPG-Fc on Decellularized Aortic Valves by EDC/NHS Attenuates Rat MSCs Calcification In Vitro
Qiao Zhang1, Si Chen1, Jiawei Shi1
1From the Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|April 21, 2018
Summary
Osteoprotegerin-Fc (OPG-Fc) fusion protein, whether free or immobilized on decellularized aortic valves, effectively reduces calcification in mesenchymal stromal cells (MSCs). This suggests OPG-Fc as a potential therapeutic for heart valve calcification.
Area of Science:
- Biomaterials Science
- Cardiovascular Research
- Regenerative Medicine
Background:
- Valve calcification is a major cause of natural and tissue-engineered heart valve failure.
- Current interventions for valve calcification lack ideal efficacy.
- Osteoprotegerin (OPG) shows promise in inhibiting vascular calcification.
Purpose of the Study:
- To investigate the efficacy of free OPG-Fc and OPG-Fc immobilized on decellularized aortic valves in attenuating calcification.
- To assess the impact of OPG-Fc on cellular markers of osteogenic differentiation.
Main Methods:
- Mesenchymal stromal cells (MSCs) were induced to calcify using osteogenic media.
- OPG-Fc was applied either as a free protein or coupled to decellularized porcine aortic valve scaffolds using EDC/NHS chemistry.
- Calcification was assessed by measuring matrix calcium content, alkaline phosphatase (ALP) activity, and osteoblastic gene expression (BMP-2, OPN, OC).
Main Results:
- Both free OPG-Fc and OPG-Fc-coupled scaffolds significantly reduced matrix calcium content and ALP activity in MSCs.
- mRNA expression of osteoblastic markers (BMP-2, OPN, OC) was decreased in MSCs treated with OPG-Fc.
- Immobilization of OPG-Fc on scaffolds was achieved using EDC/NHS coupling agents.
Conclusions:
- Free and immobilized OPG-Fc effectively attenuate calcification in MSCs induced by osteogenic differentiation.
- OPG-Fc holds potential as a novel therapeutic or preventive strategy for both natural and tissue-engineered heart valve calcification.
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