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Exposure of single-walled carbon nanotubes impairs the functions of primarily cultured murine peritoneal macrophages.
- Source :
-
Nanotoxicology . Aug2013, Vol. 7 Issue 5, p1028-1042. 15p. - Publication Year :
- 2013
-
Abstract
- It is increasingly important to understand the single-walled carbon nanotubes' (SWCNTs) immune response as their increasingly biomedical researches and applications. Macrophages and T cells play important roles in scavenging foreign materials and pathogens and regulating immune response. In this work, primarily cultured murine peritoneal macrophages and purified splenic T cells were utilised to determine the toxic effects of SWCNTs and acid-functionalised SWCNTs (AF-SWCNTs) on the immune system, especially on macrophage functions. Macrophages were exposed to 0-50 μg/ml of CNTs for 24 h and no significant cytotoxicity was found by live/dead and annexin-V-FITC/PI analyses. The TEM images revealed that AF-SWCNTs were engulfed mostly through phagocytosis and located in lysosomes of macrophages. Measurement of mitochondrial membrane potential and proteasome subunit gene expression demonstrated that 10 and 50 μg/ml AF-SWCNTs could damage mitochondrial function and proteasome formation in a concentration-dependent manner. Functional analyses revealed that the percentage of phagocytic cells were affected significantly by 20 μg/ml CNTs, and 5 μg/ml AF-SWCNTs inhibited the phagocytic efficiency of latex beads in macrophages. The accessory cell function was affected by both AF-SWCNTs and SWCNTs at concentrations of 10 and 50 μg/ml, respectively. Furthermore, AF-SWCNT biased naïve T-cell differentiation to Th1 type by inducing the production of IFN-γ and TNF, implying the potential risk of Th1-associated diseases (e.g. autoimmune diseases and inflammation) on AF-SWCNT exposure. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17435390
- Volume :
- 7
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Nanotoxicology
- Publication Type :
- Academic Journal
- Accession number :
- 88937345
- Full Text :
- https://doi.org/10.3109/17435390.2012.694487