Autophagic Cell Death in Glioma Cell Induced by Ceramide through JNK/c-Jun Pathway
ZHANG Lu-yong
ZHANG Miao
LIU Shi-bu
LI Rui
Abstract：Objective To observe the autophagy of 87-MG and U251 glioma cells induced by ceramide and explore the possible mecha-nism. Methods The viability and apoptosis of 87-MG and U251 cells were detected by MTT assay and flow cytometry, respectively. Autoph-agic-related protein expressions of LC3B/LC3A and Beclin-1 were determined by Western blotting. The activation of JNK/c-Jun signaling pathway induced by ceramide with or without the treatment of JNK specific inhibitor SP600125 was also measured. Results 24 hours after treatment of ceramide, the growth of 87-MG and U251 cells was significantly inhibited time-dependently (P<0.05);and the number of au-tophagic cells increased dose-dependently (P<0.05). The levels of LC3B/LC3A and Beclin-1 significantly increased after ceramide treat-ment (P<0.05). JNK signaling pathway was activated in the 87-MG and U251 cells and the phosphorylation of c-Jun also increased after ce-ramide treatment. This activation of autophagy could be reversed by the pre-treatment of SP600125. Conclusion Ceramide may induce au-tophagy in 87-MG and U251 glioma cells and the mechanism may be related to the activation of JNK/c-Jun signaling pathway.
Keywords：glioma cellceramideautophagic cell deathJNK signaling pathway
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 905-912 )