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Journal of colloid and interface science v.512, 2018년, pp.665 - 673   SCI SCIE
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Differential effects of graphene oxide nanosheets on Candida albicans phagocytosis by murine peritoneal macrophages

Diez-Orejas, R.    (Department of Microbiology, Faculty of Pharmacy, Universidad Complutense de Madrid, 28040 Madrid, Spain   ); Feito, M.J.    (Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain   ); Cicuéndez, M.    (CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal   ); Rojo, J.M.    (Department of Cellular and Molecular Medicine, Centro de Investigaciones Biológicas, CSIC, 28040 Madrid, Spain   ); Portolés, M.T.    (Department of Biochemistry and Molecular Biology I, Faculty of Chemistry, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain  );
  • 초록  

    Abstract Macrophages, as effector cells involved in the innate and adaptive immunity, play a key role in the response to nanomaterials as graphene oxide (GO) and in their cellular uptake. The interactions at the interface of GO nanosheets, macrophages and microbial pathogens need to be assessed to determine the possible impairment of the immune system induced by biomedical treatments with this nanomaterial. Here, we have evaluated by flow cytometry and confocal microscopy the ability of murine peritoneal macrophages to phagocytose the fungal pathogen Candida albicans , alive or heat-killed, after treatment with poly(ethylene glycol-amine)-derivatized GO nanosheets (PEG-GO). After GO treatment, differences in fungal phagocytosis were observed between macrophages that had taken up GO nanosheets (GO + population) and those that had not (GO − population). GO treatment increased the ingested alive yeasts in GO − macrophages, whereas phagocytosis diminished in the GO + population. Ingestion of heat-killed yeasts was slightly higher in both GO − and GO + populations when comparing with control macrophages. For the first time, we show that GO uptake by macrophages modulates its phagocytic capability, affecting differentially the subsequent ingestion of either alive or heat-killed yeasts. Enhanced ingestion of heat-killed yeast by GO-treated macrophages suggests a beneficial role of this nanomaterial for the clearance of dead microorganisms during infection. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Graphene oxide .   Macrophage .   Candida albicans .   Phagocytosis .   Nanomaterial .   Immune response.  

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