Wear particles induce a new macrophage phenotype with the potential to accelerate material corrosion within total hip replacement interfaces.

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ID: 64594
2019
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Abstract
Evidence that macrophages can play a role in accelerating corrosion in CoCrMo alloy in total hip replacement (THR) interfaces leads to questions regarding the underlying cellular mechanisms and immunological responses. Hence, we evaluated the role of macrophages in corrosion processes using the cell culture supernatant from different conditions and the effect of wear particles on macrophage dynamics. Monocytes were exposed to CoCrMo wear particles and their effect on macrophage differentiation was investigated by comparisons with M1 and M2 macrophage differentiation. Corrosion associated macrophages (M macrophages) exhibited upregulation of TNF-α, iNOS, STAT-6, and PPARG and down-regulation of CD86 and ARG, when compared to M1 and M2 macrophages. M cells also secreted higher levels of IL-8, IL-1β, IL-6, IL-10, TNF-α, and IL-12p70 than M1 macrophages and/or M2 macrophages. Our findings revealed variation in macrophage phenotype (M) induced by CoCrMo wear particles in generating a chemical environment that induces cell-accelerated corrosion of CoCrMo alloy at THR modular interfaces.
Reference Key
bijukumar2019wearacta Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bijukumar, Divya Rani;Salunkhe, Shruti;Zheng, Guoxing;Barba, Mark;Hall, Deborah J;Pourzal, Robin;Mathew, Mathew T;
Journal Acta biomaterialia
Year 2019
DOI
S1742-7061(19)30718-4
URL
Keywords
gene expression monocytes corrosion cocrmo electrochemical impedance spectroscopy (eis) macrophage polarization modular junction thr

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