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. 2022 Oct;21(5):1457-1481.
doi: 10.1007/s10237-022-01601-5. Epub 2022 Jul 19.

An agent-based model of vibration-induced intimal hyperplasia

Maha Reda  1   2 , Christophe Noël  3 , Nicla Settembre  4 , Jérôme Chambert  2 , Arnaud Lejeune  2 , Gwenae L Rolin  5   6 , Emmanuelle Jacquet  2
Affiliations
Free article

An agent-based model of vibration-induced intimal hyperplasia

Maha Reda et al. Biomech Model Mechanobiol. 2022 Oct.
Free article

Abstract

Acute exposure to hand-arm transmitted vibrations (HAVs) may decrease the wall shear stress (WSS) exerted by the blood flow on the arterial endothelium. In the case of chronic exposure to HAVs, these WSS changes can lead to arterial growth and remodeling potentially induced by an intimal hyperplasia phenomenon. Accordingly, we implemented an agent-based model (ABM) that captures the hemodynamics-driven and mechanoregulated cellular mechanisms involved in vibration-induced intimal hyperplasia. Our ABM was combined with flow loop experiments that investigated the WSS-modulated secretion of the platelet-derived growth factor BB (PDGF-BB) by the endothelial cells. The ABM rules parameters were then identified and calibrated using our experimental findings and literature data. The model was able to replicate the basal state (no vibration) as well as predict a 30% stenosis resulting from a chronic drop of WSS values mimicking exposure to vibration during a timeframe of 10 years. The study of the influence of different WSS-modulated phenomena on the model showed that the magnitude of stenosis largely depends on the migratory effects of PDGF-BB and the mitogenic effects of Transforming Growth Factor [Formula: see text] on the Smooth Muscle Cells. The results also proved that the fall in circumferential stress due to arterial layer thickening to a great extent accounts for the degradation of the Extracellular Matrix in the media.

Keywords: Agent-based model; Hand-arm vibration; Intimal hyperplasia; Wall shear stress.

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