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Shazly T, Eberth JF, Kostelnik CJ, Uline MJ, Chitalia VC, Spinale FG, Alshareef A, Kolachalama VB. Hydrophilic Coating Microstructure Mediates Acute Drug Transfer in Drug-Coated Balloon Therapy. ACS APPLIED BIO MATERIALS 2024; 7:3041-3049. [PMID: 38661721 PMCID: PMC11366439 DOI: 10.1021/acsabm.4c00080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Drug-coated balloon (DCB) therapy is a promising endovascular treatment for obstructive arterial disease. The goal of DCB therapy is restoration of lumen patency in a stenotic vessel, whereby balloon deployment both mechanically compresses the offending lesion and locally delivers an antiproliferative drug, most commonly paclitaxel (PTX) or derivative compounds, to the arterial wall. Favorable long-term outcomes of DCB therapy thus require predictable and adequate PTX delivery, a process facilitated by coating excipients that promotes rapid drug transfer during the inflation period. While a variety of excipients have been considered in DCB design, there is a lack of understanding about the coating-specific biophysical determinants of essential device function, namely, acute drug transfer. We consider two hydrophilic excipients for PTX delivery, urea (UR) and poly(ethylene glycol) (PEG), and examine how compositional and preparational variables in the balloon surface spray-coating process impact resultant coating microstructure and in turn acute PTX transfer to the arterial wall. Specifically, we use scanning electron image analyses to quantify how coating microstructure is altered by excipient solid content and balloon-to-nozzle spray distance during the coating procedure and correlate obtained microstructural descriptors of coating aggregation to the efficiency of acute PTX transfer in a one-dimensional ex vivo model of DCB deployment. Experimental results suggest that despite the qualitatively different coating surface microstructures and apparent PTX transfer mechanisms exhibited with these excipients, the drug delivery efficiency is generally enhanced by coating aggregation on the balloon surface. We illustrate this microstructure-function relation with a finite element-based computational model of DCB deployment, which along with our experimental findings suggests a general design principle to increase drug delivery efficiency across a broad range of DCB designs.
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Affiliation(s)
- Tarek Shazly
- Department of Biomedical Engineering Program, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Mechanical Engineering, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
- Cardiovascular Translational Research Center, University of South Carolina, Columbia, South Carolina 29208, United States
| | - John F Eberth
- Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Colton J Kostelnik
- Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania 19104, United States
- Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Mark J Uline
- Department of Biomedical Engineering Program, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
- Cardiovascular Translational Research Center, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Chemical Engineering, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Vipul C Chitalia
- Department of Medicine, Boston University School of Medicine, Boston, Massachusetts 02118, United States
- VA Coston Healthcare System, Boston, Massachusetts 02115, United States
| | - Francis G Spinale
- Department of Biomedical Engineering Program, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
- Cardiovascular Translational Research Center, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ahmed Alshareef
- Department of Biomedical Engineering Program, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Mechanical Engineering, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina 29208, United States
- Cardiovascular Translational Research Center, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Vijaya B Kolachalama
- Department of Medicine, Boston University School of Medicine, Boston, Massachusetts 02118, United States
- Department of Computer Science and Faculty of Computing & Data Sciences, Boston University, Boston, Massachusetts 02115, United States
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Sarifuddin, Mandal PK. Plaque heterogeneity and the spatial distributions of its components dictate drug-coated balloon therapy. Sci Rep 2024; 14:4412. [PMID: 38388639 PMCID: PMC11053051 DOI: 10.1038/s41598-024-54756-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 02/16/2024] [Indexed: 02/24/2024] Open
Abstract
Drug-coated balloon (DCB) angioplasty is one of the potential approaches to alleviating in-stent restenosis and treating peripheral artery disease. An in-silico model has been developed for sirolimus drug eluted from an inflated balloon in a patient-specific arterial cross-section consisting of fibrous tissue, fibrofatty tissue, dense calcium, necrotic core, and healthy tissue. The convection-diffusion-reaction equation represents the transport of drug, while drug binding, both specific and non-specific, can be modelled as a reaction process. The Brinkman equations describe the interstitial flow in porous tissue. An image processing technique is leveraged for reconstructing the computational domain. The Marker and Cell, and Immersed Boundary Methods are used to solve the set of governing equations. The no-flux interface condition and convection do amplify the tissue content, and the regions of dense calcium and necrotic core limited to or extremely close to the interface pose a clinical threat to DCB therapy. Simulations predict the effects of the positioning and clustering of plaque components in the domain. This study demands extensive intravascular ultrasound-derived virtual histology (VH-IVUS) imaging to understand the plaque morphology and determine the relative positions of different plaque compositions about the lumen-tissue interface, which have a significant impact on arterial pharmacokinetics.
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Affiliation(s)
- Sarifuddin
- Department of Mathematics, Berhampore College, Berhampore, Murshidabad, W.B., 742 101, India
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