Effects and Mechanism of Luteolin on Proliferation and Apoptosis of Glioma

To explore and analyze the efficacy of luteolin on the proliferation and apoptosis of cerebral glioma and its possible mechanism, providing a theoretical basis for luteolin in glioma treatment.

The cell line of Human cerebral glioma U87 was utilized for our current research. The study group were added with 0, 20, 40, and 80 μmol/L luteolin, respectively. Luteolin's Inhibitory function in the proliferation of U87 cells was detected by CCK-8, the Transwell chamber test was used to measure cell migration and invasion, while flow cytometry was used to assess apoptosis and Western Blot to gauge the expression of JNK/STAT3 pathway proteins.

In comparison with the control group, the intervention of various doses of luteolin could effectively inhibit glioma cell proliferation, the inhibitory rate uplifted remarkably with an increase of dose as well as intervention time (95% CI. 92.160-107.494, P < .05), which presented a significant time and dose dependence. The apoptosis rate of the low-dose, medium-dose, and high-dose categories was higher than that of the comparison group after 2 days of luteolin intervention (P < .05), and the apoptosis rate appeared to increase with the increase in intervention dose (P < .05). After 2 days of luteolin intervention, there were significantly more migratory and invasive cells in 3 categories than that in the control group (P < .05), and the number increased as the luteolin intervention dose was raised (P < .05). Bax and Cyt-c expressions dropped after 2 days of luteolin treatment when compared with the control set (P < .05), and the expression of Bax and Cyt-c fell considerably with increasing luteolin dose. Bcl-2, Caspase-3 and PARP expressions were significantly elevated in comparison to the control group (P < .05), and the increase was more obvious with the rise of the luteolin dose.

Luteolin has a good inhibiting function on the proliferation of glioma cells, inhibiting cellular invasion and migration and promoting the apoptosis of glioma cells and the expression of apoptosis-related proteins, which has laid a good foundation for the application of luteolin to treat glioma cells.