Abstract：
:Compound C, a well-known inhibitor of AMP-activated protein kinase (AMPK), has been reported to exert antitumor activities in some types of cells. Whether compound C can exert antitumor effects in human cholangiocarcinoma (CCA) remains unknown. Here, we demonstrated that compound C is a potent inducer of cell death and autophagy in human CCA cells. Autophagy inhibitors increased the cytotoxicity of compound C towards human CCA cells, as confirmed by increased LDH release, and PARP cleavage. It is notable that compound C treatment increased phosphorylated Akt, sustained high levels of phosphorylated p70S6K, and decreased mTOR regulated p-ULK1 (ser757). Based on the data that blocking PI3K/Akt or mTOR had no apparent influence on autophagic response, we suggest that compound C induces autophagy independent of Akt/mTOR signaling in human CCA cells. Further study demonstrated that compound C inhibited the phosphorylation of JNK and its target c-Jun. Blocking JNK by SP600125 or siRNA suppressed autophagy induction upon compound C treatment. Moreover, compound C induced p38 MAPK activation, and its inhibition promoted autophagy induction via JNK activation. In addition, compound C induced p53 expression, and its inhibition attenuated compound C-induced autophagic response. Thus, compound C triggers autophagy, at least in part, via the JNK and p53 pathways in human CCA cells. In conclusion, suppresses autophagy could increase compound C sensitivity in human CCA.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Zhao X,Luo G,Cheng Y,Yu W,Chen R,Xiao B,Xiang Y,Feng C,Fu W,Duan C,Yao F,Xia X,Tao Q,Wei M,Dai Rdoi
10.1002/jcb.26723subject
Has Abstractpub_date
2018-07-01 00:00:00pages
5538-5550issue
7eissn
0730-2312issn
1097-4644journal_volume
119pub_type
杂志文章abstract：:To find the key factors that were involved in the survival and vascular endothelial differentiation of chick blatodisc induced by fibroblast growth factor 2 (FGF-2), we built a chick vasculogenesis model in vitro. Subsequently, the activities of phosphatidylcholine-specific phospholipase C (PC-PLC), including Ca(2+)-d...
journal_title：Journal of cellular biochemistry
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