白头翁汤正丁醇提取物主要组分对中性粒细胞趋化抑制作用的比较研究

Main components in butyl alcohol extract of Baitouweng Decoction inhibited neutrophil chemotaxis

比较白头翁汤正丁醇提取物主要组分秦皮甲素、盐酸小檗碱、白头翁皂苷B4对中性粒细胞趋化抑制作用的影响。将HL60细胞培养于配制好的1640完全培养基中培养,按2×105个/mL细胞密度置于6孔板中,每孔4 mL,按体积分数1.3%加入DMSO培养5 d,于倒置显微镜检查细胞形态变化;流式细胞术分析DMSO诱导后细胞CD11b的表达;采用CCK8法检测秦皮甲素、盐酸小檗碱、白头翁皂苷B4对DMSO诱导后细胞增殖的影响;采用Transwell法检测秦皮甲素、盐酸小檗碱、白头翁皂苷B4对DMSO诱导后细胞迁移的影响;采用流式细胞术和激光共聚焦显微镜检测秦皮甲素,盐酸小檗碱,白头翁皂苷B4对DMSO诱导后细胞F-actin的产生及其极化的调节;Western blot检测PI3K/Akt的表达。结果表明,HL60细胞经DMSO诱导后,细胞呈典型的中性粒细胞形态。流式细胞术分析表明诱导后细胞CD11b的表达水平明显增加。100μg·mL^(-1)秦皮甲素,8μg·mL^(-1)盐酸小檗碱,80μg·mL^(-1)白头翁皂苷B4可有效地抑制中性粒细胞的迁移,明显降低F-actin的表达;其中盐酸小檗碱可显著地降低磷酸化PI3K/Akt蛋白水平。上述结果表明,BAEB 3种主要组分对中性粒细胞趋化均有抑制作用,其中盐酸小檗碱的作用最明显,该作用可能与抑制F-actin及PI3K/Akt通路相关。

The present study aims to investigate the effects of the main components(aesculin, berberine hydrochloride, and anemoside B4) in the butyl alcohol extract of Baitouweng Decoction(BAEB) on the chemotaxis of neutrophils induced by dimethyl sulfoxide(DMSO). HL60 cells were cultivated in RPMI-1640 complete medium, and transferred into a 6-well plate(2 × 105 per mL) with 4 mL in each well, followed by incubation with DMSO at 1.3% for five days. The morphologic changes of cells were observed under an inverted microscope. The CD11 b expression after DMSO induction was analyzed by flow cytometry. The effects of aesculin, berberine hydrochloride, and anemoside B4 on the cell proliferation and migration were detected by CCK8 assay and Transwell assay, respectively. The effects of the main components on the production and polarization of F-actin protein were also examined by flow cytometry and laser confocal microscopy. PI3 K/Akt signaling pathway was checked by Western blot. As revealed by the results, neutrophil-like HL60 cells were observed after DMSO induction. The CD11 b expression in these cells increased significantly as indicated by the flow cytometry. Additionally, 100 μg·mL^(-1) aesculin, 8 μg·mL^(-1) berberine hydrochloride, and 80 μg·mL^(-1) anemoside B4 were potent in inhibiting the migration of neutrophils and reducing F-actin expression. Berberine hydrochloride was verified to be capable of diminishing phosphorylated PI3 K/Akt protein expression. The findings indicate that aesculin, anemoside B4, and especially berberine hydrochloride in the BAEB can inhibit the chemotaxis of neutrophils, which is possibly achieved by the inhibition of F-actin and PI3 K/Akt signaling pathway.