Effect of macrophage classical (M1) activation on implant-adherent macrophage interactions with Staphylococcus epidermidis: A murine in vitro model system.

Journal of Biomedical Materials Research. Part a
Kyung R Park, James D Bryers

Abstract

A model in vitro system was developed for eliciting classical (M1) activation of surface-adherent murine macrophages, which was then used to study the interaction of the M1 macrophages with Staphylococcus epidermidis. Glass substrata were first covalently grafted with a mixture of methoxy- and biotin-terminated silanated polyethylene glycol. Interferon (IFN)-γ and/or lipopolysaccharide (LPS), ligands known to induce the highly microbicidal M1 activation state in macrophages, were biotinylated and immobilized by way of a streptavidin intermediate to the biotin-PEG base substratum. Assessment of mouse bone marrow-derived macrophage (BMDM) interleukin (IL)-12(p40) and nitric oxide response to the fabricated surfaces confirmed that the model system achieved activation of adherent macrophage: IFN-γ-presenting surfaces primed cells for M1 activation, LPS-presenting surfaces elicited innate activation, and surface presenting a combination of IFN-γ and LPS induced M1 activation. The phagocytic and microbicidal capacity of activated, surface-adherent BMDM was evaluated using S. epidermidis, a bacterial species prevalent in implant-associated infections. Results indicate that M1 activation of implant-adherent macrophages trends towards d...Continue Reading

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Citations

Aug 27, 2014·Journal of Neuroimmunology·Yenis Gutierrez-Murgas, Jessica N Snowden
May 12, 2017·Cell Biology International·Liangying ZhuPing Dong

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