Specific and nonspecific binding of drug eluted from a half-embedded stent in presence of atherosclerotic plaque

Mandal Akash Pradip; Mandal Prashanta Kumar

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Specific and nonspecific binding of drug eluted from a half-embedded stent in presence of atherosclerotic plaque

机译：Specific and nonspecific binding of drug eluted from a half-embedded stent in presence of atherosclerotic plaque

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This study is dealt with the two-phase binding (specific and nonspecific) of drug eluted from a half- embedded drug-eluting stent in presence of atherosclerotic plaque. The specific binding due to the interaction of drug molecules with specific receptors and nonspecific binding caused by the trapping of drug in the extra-cellular matrix have been paid due attention. An idealised wall consisting of a plaque and a healthy tissue region has been considered. Moreover, a Dirichlet release condition is imposed on the strut surface. In this investigation, a two-dimensional model governing drug transport and its two-phase binding in cylindrical polar coordinate system has been solved numerically by a finite-difference method. Our simulation predicts that plaque behaves like a physical barrier in two types of the binding process and there is an inverse relationship between bound drug concentration and plaque thickness. Simulations show that a single peak profile of drug is noted when the struts are situated one-strut radius apart and as the inter-strut distance increases, the peak concentration falls and distinct peak profiles over each strut are visualised. The model also reveals that in the region downstream of a strut, the concentration of both bound drug forms in the plaque and healthy regions increases, and eventually, the saturation length of binding sites increases. Predicted results show for smaller Damkohler number, the rapid saturation of binding sites takes place and the stent having thinner strut may perform well in terms of effectiveness as well as efficacy in the stent-based delivery.

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《Computer methods in biomechanics and biomedical engineering》 |2022年第8期|922-935|共14页
作者
Mandal Akash Pradip; Mandal Prashanta Kumar;
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作者单位

North Bengal Univ;

Visva Bharati Univ;

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原文格式 PDF
正文语种英语
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关键词
Half-embedded DES; specific binding; nonspecific binding; nonlinear saturable reversible chemical reaction; atherosclerotic plaque;

Specific and nonspecific binding of drug eluted from a half-embedded stent in presence of atherosclerotic plaque

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