1. Effect of Octadecadienoic Acid on Proliferation and Apoptosis of Glioma Cells and Its Mechanism.
- Author
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Mingren XIE, Xia YUAN, Shan QI, Lei YU, and Farong YU
- Subjects
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POISONS , *GLIOMAS , *DIMETHYL sulfoxide , *ENZYME-linked immunosorbent assay , *HUMAN cell culture , *APOPTOSIS - Abstract
[Objectives] To explore the inhibitory effect of octadecadienoic acid (ODA) on proliferation and apoptosis of glioma cells and its mechanism. [Methods] Cultured human glioma cells (cell density 2 xlO6 cells/L) were divided into three groups: solvent control group (DMSO, 30 p,L/L), 5-FU group (10 mg/L) and octadecadienoic acid group (0.3, 0.6, 1.2 mg/L). The toxic effects of ODA on glioma cells were detected by trypan blue and thiazolium blue (MTT). The expression of P53, PI3 K, P21, PKB/Akt and caspase-9 protein in glioma cells were detected by enzyme-linked immunosorbent assay (ELISA). [ Results] The cell count under optical microscope showed that the inhibition rate of cell proliferation in low, medium and high dose ODA groups and 5-FU group was significantly higher than that in solvent control group (P <0.01), but there was no significant difference compared with 5-FU group (P >0.05). The results of MTT showed that compared with the solvent control group, the inhibition rate of cell proliferation in low, medium and high dose ODA groups and 5-FU group significantly increased (P<0.01); compared with 5-FU group, the inhibition rate of cell proliferation in high dose ODA group significantly increased (P <0.01). The results of flow cytometry showed that compared with the solvent control group, the number of cells in G0/Gj phase increased significantly (P <0.05, P<0.01), the number of cells in G2/M phase decreased significantly (P <0.01) and the apoptosis rate increased significantly (P <0.01) in the low, medium and high dose ODA groups and 5-FU group; compared with 5-FU group, the number of cells in G2/M phase decreased significantly (P < 0.01) and the apoptosis rate increased significantly (P < 0.01) in ODA group. ELISA testing results showed that the expression levels of P53, P13K and PKB/Akt in low, medium and high dose ODA groups and 5-FU group were significantly lower than those in solvent control group (P <0.01), and only the expression level of protein in high dose ODA group was significantly lower than that in 5-FU group (P <0.01); the expression levels of P21 and caspase-9 in low, medium and high dose ODA groups and 5-FU group were significantly higher than those in solvent control group (P <0. 05, P <0. 01), but the expression level of protein in high dose ODA group was significantly higher than that in 5-FU group (P<0.01). [Conclusions] ODA can obviously inhibit the proliferation of glioma cells and induce apoptosis. The mechanism is related to up-regulation of P21, caspase-9, down-regulation of P53, P13K, PKB/Akt, inhibition of cell division cycle and decrease of P13K-Akt signal transduction pathway. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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