Radiosensitivity enhancement by Co-NMS-mediated mitochondrial impairment in glioblastoma.

Abstract:

:We investigated the radiosensitizing effects of Co-NMS, a derivative of nimesulide based on a cobalt carbonyl complex, on malignant glioma cells. In the zebrafish exposed to Co-NMS ranging from 5 to 20 μM, cell death and heat shock protein 70 expression in the brain and neurobehavioral performance were evaluated. Our data showed that Co-NMS at 5 μM did not cause the appreciable neurotoxicity, and thereby was given as a novel radiation sensitizer in further study. In the U251 cells, Co-NMS combined with irradiation treatment resulted in significant inhibition of cell growth and clonogenic capability as well as remarkable increases of G2/M arrest and apoptotic cell population compared to the irradiation alone treatment. This demonstrated that the Co-NMS administration exerted a strong potential of sensitizing effect on the irradiated cells. With regard to the tumor radiosensitization of Co-NMS, it could be primarily attributed to the Co-NMS-derived mitochondrial impairment, reflected by the loss of mitochondrial membrane potential, the disruption of mitochondrial fusion and fission balance as well as redox homeostasis. Furthermore, the energy metabolism of the U251 cells was obviously suppressed by cotreatment with Co-NMS and irradiation through repressing mitochondrial function. Taken together, our findings suggested that Co-NMS could be a desirable drug to enhance the radiotherapeutic effects in glioblastoma patients.

journal_name

J Cell Physiol

authors

Liu Y,Zhang T,Li G,Li S,Li J,Zhao Q,Wu Q,Xu D,Hu X,Zhang L,Li Q,Zhang H,Liu B

doi

10.1002/jcp.29774

subject

Has Abstract

pub_date

2020-12-01 00:00:00

pages

9623-9634

issue

12

eissn

0021-9541

issn

1097-4652

journal_volume

235

pub_type

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