RT Journal Article
T1 Differential effects of graphene oxide nanosheets on Candida albicans phagocytosis by murine peritoneal macrophages
A1 Díez Orejas, Rosalía María
A1 Feito Castellano, María José
A1 Cicuéndez Maroto, Mónica
A1 Rojo, J.M.
A1 Portolés Pérez, María Teresa
AB 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 nanomate-rial. 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+ pop-ulation) 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.
PB Elsevier
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/96728
UL https://hdl.handle.net/20.500.14352/96728
LA eng
NO R. Diez-Orejas et al. / Journal of Colloid and Interface Science 512 (2018) 665–673
NO Ministerio de Economía y Competitividad(España)
NO Fundação para a Ciência e a Tecnologia(Portugal)
DS Docta Complutense
RD 22 jul 2024