期刊
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
卷 45, 期 -, 页码 212-221出版社
ELSEVIER
DOI: 10.1016/j.etap.2016.06.006
关键词
Proliferation; Mitophagy; Cyclooxygenase-2; Arsenic trioxide; HepG2
资金
- National Natural Science Foundations of China [31300437, 31300941]
Mitochondrial damage can trigger mitophagy and eventually suppress proliferation. However, the effect of mitophagy on proliferation remains unclear. In this study, HepG2 cells were used to assess mitophagy and proliferation arrest in response to As2O3 exposure. The stimulatory effect of As2O3 on mitophagy was investigated by assessing morphology (mitophagosome and mitolysosome) and relevant proteins (PINK1, LC3 II/I, and COX IV). Additionally, the relationship of mitophagy and proliferation was explored through the use of mitophagy inhibitors (CsA, Mdivi-1). Interestingly, the inhibition of mitophagy rescued proliferation arrest by restoring COX-2 protein level and countered the elimination of mitochondria-located COX-2 and up-regulated the COX-2 mRNA level. Taken together, our findings indicated that mitophagy can be induced and can inhibit proliferation by reducing COX-2 in HepG2 cells during As2O3 treatment. (C) 2016 Elsevier B.V. All rights reserved.
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