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Small, Thin Graphene Oxide Is Anti-inflammatory Activating Nuclear Factor Erythroid 2-Related Factor 2 via Metabolic Reprogramming

Citation

Hoyle, C and Rivers-Auty, J and Lemarchand, E and Vranic, S and Wang, E and Buggio, M and Rothwell, NJ and Allan, SM and Kostarelos, K and Brough, D, Small, Thin Graphene Oxide Is Anti-inflammatory Activating Nuclear Factor Erythroid 2-Related Factor 2 via Metabolic Reprogramming, ACS nano, 12, (12) pp. 11949-11962. ISSN 1936-0851 (2018) [Refereed Article]

Copyright Statement

Copyright 2019 American Chemical Society

DOI: doi:10.1021/acsnano.8b03642

Abstract

Graphene oxide (GO), an oxidized form of graphene, has potential applications in biomedical research. However, how GO interacts with biological systems, including the innate immune system, is poorly understood. Here, we elucidate the effects of GO sheets on macrophages, identifying distinctive effects of GO on the inflammatory phenotype. Small, thin (s)-GO dose-dependently inhibited release of interleukin (IL)-1β and IL-6 but not tumor necrosis factor α. NLRP3 inflammasome and caspase-1 activation was not affected. The effect of s-GO was pretranslational, as s-GO blocked Toll-like receptor 4-dependent expression of Il1b and Il6 but not Nlrp3 or Tnf mRNA transcripts. s-GO was internalized by immortalized bone-marrow-derived macrophages, suggesting a potential intracellular action. Uptake of polystyrene beads with similar lateral dimensions and surface charge did not phenocopy the effects of s-GO, suggesting that s-GO-mediated inhibition of interleukin expression was not simply due to particle phagocytosis. RNA-Seq analysis established that s-GO had profound effects on the immunometabolism of the cells, leading to activation of the transcription factor nuclear factor erythroid 2-related factor 2, which inhibited expression of cytokines such as IL-1β and IL-6. Thus, we have identified immunometabolic effects of GO that reveal another dimension to its effects on cells. These findings suggest that s-GO may be used as a valuable tool to generate further insights into inflammatory mechanisms and indicate its potential applications in biomedicine.

Item Details

Item Type:Refereed Article
Keywords:graphene oxide, macrophage, inflammation, inflammasome, NLRP3, IL-1β, immunometabolism
Research Division:Medical and Health Sciences
Research Group:Immunology
Research Field:Innate Immunity
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Immune System and Allergy
UTAS Author:Rivers-Auty, J (Dr Jack Auty)
ID Code:135832
Year Published:2018
Web of Science® Times Cited:2
Deposited By:Medicine
Deposited On:2019-11-15
Last Modified:2019-12-12
Downloads:0

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