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2017 ; 12
(ä): 6633-6646
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The mechanisms of graphene-based materials-induced programmed cell death: a
review of apoptosis, autophagy, and programmed necrosis
#MMPMID28924347
Ou L
; Lin S
; Song B
; Liu J
; Lai R
; Shao L
Int J Nanomedicine
2017[]; 12
(ä): 6633-6646
PMID28924347
show ga
Graphene-based materials (GBMs) are widely used in many fields, including
biomedicine. To date, much attention had been paid to the potential unexpected
toxic effects of GBMs. Here, we review the recent literature regarding the impact
of GBMs on programmed cell death (PCD). Apoptosis, autophagy, and programmed
necrosis are three major PCDs. Mechanistic studies demonstrated that the
mitochondrial pathways and MAPKs (JNK, ERK, and p38)- and TGF-?-related signaling
pathways are implicated in GBMs-induced apoptosis. Autophagy, unlike apoptosis
and necroptosis which are already clear cell death types, plays a vital
pro-survival role in cell homeostasis, so its role in cell death should be
carefully considered. However, GBMs always induce unrestrained autophagy
accelerating cell death. GBMs trigger autophagy through inducing autophagosome
accumulation and lysosome impairment. Mitochondrial dysfunction, ER stress, TLRs
signaling pathways, and p38 MAPK and NF-?B pathways participate in GBMs-induced
autophagy. Programmed necrosis can be activated by RIP kinases, PARP, and TLR-4
signaling in macrophages after GBMs exposure. Though apoptosis, autophagy, and
necroptosis are distinguished by some characteristics, their numerous signaling
pathways comprise an interconnected network and correlate with each other, such
as the TLRs, p53 signaling pathways, and the Beclin-1 and Bcl-2 interaction. A
better understanding of the mechanisms of PCD induced by GBMs may allow for a
thorough study of the toxicology of GBMs and a more precise determination of the
consequences of human exposure to GBMs. These determinations will also benefit
safety assessments of the biomedical and therapeutic applications of GBMs.