Dihydroartemisinin inhibits EMT of glioma via gene BASP1 in extrachromosomal DNA
Que, Z.; Zhou, Z.; Liu, S.; Lei, B.; Zheng, W.
Show abstract
The mechanism of dihydroartemisinin (DHA) inhibiting the migration and invasion of glioma in an ROS-DSB-dependent manner has been revealed. Extrachromosomal DNAs (ecDNAs) which are generated by DNA damage have great potential in glioma treatment. However, the role of ecDNAs in DHAs pharmacological mechanisms in glioma is still unknown. In this study, DHA was found to inhibit proliferative activity, increase ROS levels and promote apoptosis in U87 and U251 cells. Migration and invasion have also been suppressed. ecDNA expression profiles were found in gliomas. EcDNA-BASP1 was found, by means of bioinformatics analysis, to be present in GBM tissues and positively correlated with patient prognosis. Proliferation, migration and invasion were upregulated after knockdown of ecDNA-BASP1. The expression of vimentin and N-cadherin also had the same tendency. Finally, we found that the ecDNA-BASP1 content in nude mouse transplant tumors was significantly increased after DHA treatment, which might exert a better suppressive effect on glioma. The upregulation of tumor suppressor ecDNA-BASP1 played an important role in the suppression of glioma progression induced by DHA. EcDNA-BASP1 may inhibit glioma migration and invasion through repressing epithelial-mesenchymal transition (EMT).
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