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Wang J, Kural MH, Wu J, Leiby KL, Mishra V, Lysyy T, Li G, Luo J, Greaney A, Tellides G, Qyang Y, Huang N, Niklason LE. An ex vivo physiologic and hyperplastic vessel culture model to study intra-arterial stent therapies. Biomaterials 2021; 275:120911. [PMID: 34087584 DOI: 10.1016/j.biomaterials.2021.120911] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 11/19/2022]
Abstract
Conventional in vitro methods for biological evaluation of intra-arterial devices such as stents fail to accurately predict cytotoxicity and remodeling events. An ex vivo flow-tunable vascular bioreactor system (VesselBRx), comprising intra- and extra-luminal monitoring capabilities, addresses these limitations. VesselBRx mimics the in vivo physiological, hyperplastic, and cytocompatibility events of absorbable magnesium (Mg)-based stents in ex vivo stent-treated porcine and human coronary arteries, with in-situ and real-time monitoring of local stent degradation effects. Unlike conventional, static cell culture, the VesselBRx perfusion system eliminates unphysiologically high intracellular Mg2+ concentrations and localized O2 consumption resulting from stent degradation. Whereas static stented arteries exhibited only 20.1% cell viability and upregulated apoptosis, necrosis, metallic ion, and hypoxia-related gene signatures, stented arteries in VesselBRx showed almost identical cell viability to in vivo rabbit models (~94.0%). Hyperplastic intimal remodeling developed in unstented arteries subjected to low shear stress, but was inhibited by Mg-based stents in VesselBRx, similarly to in vivo. VesselBRx represents a critical advance from the current static culture standard of testing absorbable vascular implants.
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Affiliation(s)
- Juan Wang
- Department of Anesthesiology, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Mehmet H Kural
- Department of Anesthesiology, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Jonathan Wu
- Department of Biomedical Engineering, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Katherine L Leiby
- Department of Biomedical Engineering, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Vinayak Mishra
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT, 06269, USA
| | - Taras Lysyy
- Department of Surgery, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Guangxin Li
- Department of Surgery, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Jiesi Luo
- Yale Cardiovascular Research Center, Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT06519, USA
| | - Allison Greaney
- Department of Biomedical Engineering, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - George Tellides
- Department of Surgery, School of Medicine, Yale University, New Haven, CT, 06519, USA
| | - Yibing Qyang
- Yale Cardiovascular Research Center, Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT06519, USA
| | - Nan Huang
- School of Material Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Laura E Niklason
- Department of Anesthesiology, School of Medicine, Yale University, New Haven, CT, 06519, USA; Department of Biomedical Engineering, School of Medicine, Yale University, New Haven, CT, 06519, USA.
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