目的：探讨高良姜素（Gal）是否通过调节cGAS/STING信号通路影响骨肉瘤MG63细胞增殖、迁移、侵袭和凋亡。方 法：体外培养人骨肉瘤MG63细胞，分别使用0、5、15、25、50、100、200 μmol/L的Gal培养48 h后，CCK-8法检测Gal对细胞活力的 影响。将MG63细胞分为对照组（未处理细胞）、Gal低浓度组（Gal-L组，50 μmol/L Gal处理）、Gal高浓度组（Gal-H组，100 μmol/L Gal处理）和Gal-H+STING抑制剂组（Gal-H+H-151组，100 μmol/L Gal+8 μmol/L H-151处理）。采用EdU染色法、划痕愈合实验、 Transwell小室法、流式细胞术检测各组细胞增殖活力、迁移、侵袭和凋亡能力，WB法检测各组细胞中cGAS、STING蛋白的表达 水平。结果：与对照组比较，Gal-L 组、Gal-H 组细胞增殖活力、迁移、侵袭能力均显著降低（均 P<0.05），细胞凋亡率和 cGAS、 STING蛋白表达水平均显著升高（均P<0.05）；与 Gal-H 组比较，Gal-H+H-151组细胞增殖活力、迁移和侵袭能力均显著升高（均 P<0.05），细胞凋亡率和cGAS、STING蛋白表达水平均显著降低（均P<0.05）。结论：Gal可能通过激活cGAS/STING信号通路抑 制骨肉瘤MG63细胞增殖、迁移、侵袭并促进细胞凋亡。

Objective: To investigate whether galangin (Gal) affects the proliferation, migration, invasion and apoptosis of osteosarcoma MG63 cells by regulating the cGAS/STING signaling pathway. Methods: Human osteosarcoma MG63 cells were cultured in vitro and treated with Gal at concentrations of 0, 5, 15, 25, 50, 100 and 200 μmol/L for 48 hours, and the effect of Gal on cell viability was detected by CCK-8 method. MG63 cells were divided into the control group (untreated cells), the Gal low concentration group (Gal-L group, treated with 50 μmol/L Gal), the Gal high concentration group (Gal-H group, treated with 100 μmol/L Gal), and the Gal-H+STING inhibitor group (Gal-H+H-151 group, treated with 100 μmol/L Gal+8 μmol/L H-151). EdU staining method, scratch healing test, Transwell chamber method and flow cytometry were used to detect cell proliferation, migration, invasion and apoptosis of cells in each group. Western blot was applied to detect the expression levels of cGAS and STING proteins in cells of each group. Results: Compared with the control group, the proliferation activity, migration, and invasion abilities of the cells in the Gal-L and Gal-H groups were significantly decreased (all PPPPConclusion: Gal may inhibit the proliferation, migration and invasion and promote the apoptosis of osteosarcoma cells by activating the cGAS/STING signaling pathway.

湖北省自然科学基金（No. 2020HBA216）