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The Role of Autophagy as a Mechanism of Toxicity Induced by Multi-Walled Carbon Nanotubes in Human Lung Cells
Tsukahara, Tamotsu
Matsuda, Yoshikazu
Haniu, Hisao
© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access articledistributed under the terms and conditions of the Creative Commons Attribution license(http://creativecommons.org/licenses/by/4.0/).
autophagy
carbon nanotube
lung cell
cell death
Carbon nanotubes (CNTs) are promising nanomaterials having unique physical and chemical properties, with applications in a variety of fields. In this review, we briefly summarize the intrinsic properties of highly purified multi-walled CNTs (MWCNTs, HTT2800) and their potential hazardous effects on intracellular and extracellular pathways, which alter cellular signaling and impact major cell functions such as differentiation, reactive oxygen species (ROS) production, apoptosis, and autophagy. A recent study suggested that the induction of autophagy by CNTs causes nanotoxicity. Autophagy was recently recognized as a critical cell death pathway, and autophagosome accumulation has been found to be associated with exposure to CNTs. Although autophagy is considered as a cytoprotective process, it is often observed in association with cell death, and the relationship between autophagy and cell death remains unclear. Our recent study suggests that the levels of autophagy-related genes (LC3B) and autophagosome formation are clearly up-regulated, along with an increase in numbers of autophagosome vacuoles. This review highlights the importance of autophagy as an emerging mechanism of CNT toxicity.
Article
INT J MOL SCI. 16(1):40-48 (2015)
MDPI AG
2015-01
eng
journal article
VoR
http://hdl.handle.net/10091/18036
https://soar-ir.repo.nii.ac.jp/records/3669
https://pubmed.ncbi.nlm.nih.gov/25546386
25546386
https://doi.org/10.3390/ijms16010040
10.3390/ijms16010040
1422-0067
AA12038549
INT J MOL SCI
16
1
40
48
https://soar-ir.repo.nii.ac.jp/record/3669/files/The_Role_of_Autophagy_as_a_Mechanism.pdf
application/pdf
897.9 kB
2015-09-24