基于组效关系的壮药岩黄连抑制HSC-T6细胞增殖活性成分辨识研究

目的建立岩黄连提取物的化学成分与其抑制大鼠肝星状细胞(HSC-T6)作用的组效关系模型,寻找与药效显著相关的活性成分。方法采用正交设计法提取得到9个岩黄连提取物,通过HPLC法对岩黄连提取物进行成分表征,以共有峰的相对峰面积来表征其相对质量分数;MTT法测定岩黄连提取物抑制HSC-T6细胞增殖活性,以抑制率为评价指标;利用SIMCA-P11.5软件的正交投影偏最小二乘法(OPLS)分析,研究共有峰与药效的相关性,根据S-载荷图与变异权重参数(VIP)值辨识显著活性成分;通过MTT法及流式细胞仪验证所筛选成分的活性。采用细胞乳酸脱氢酶(LDH)试剂盒观察所筛选成分对人正常肝细胞(HL-7702)LDH活性的影响。结果 HPLC法对9个岩黄连提取物进行表征分析结果确定了21个共有峰,其中19、18、13、20、14和16号共有峰(VIP1)与岩黄连抑制HSC-T6细胞增殖活性显著相关,并鉴定18、19和20号共有峰代表的化合物分别为脱氢卡维丁、巴马汀和小檗碱。MTT结果显示不同质量浓度脱氢卡维丁、巴马汀及小檗碱对HSC-T6细胞增殖具有明显抑制作用;流式细胞术检测结果也与MTT结果一致,脱氢卡维丁、巴马汀及小檗碱(0.10 mg/m L)处理HSC-T6细胞后的凋亡率分别为42.12%、42.22%、36.73%,明显高于对照组的1.69%(P0.01)。细胞毒性实验发现当脱氢卡维丁终质量浓度低于0.15 mg/m L,巴马汀与小檗碱终质量浓度低于0.10 mg/m L时,对HL-7702细胞不具有明显的细胞毒作用。结论通过组效关系研究首次发现岩黄连提取物中脱氢卡维丁、巴马汀与小檗碱在体外能显著抑制HSC-T6细胞增殖并诱导其凋亡,且在有效质量浓度下不具有明显的细胞毒作用,表明这3种化学成分极有可能是岩黄连抗肝纤维化作用的潜在活性成分且在应用中具备一定的安全性;同时也提示基于组效关系的研究思路可为天然植物药活性成分的辨识提供行之有效的方法。

Discrimination of proliferation inhibiting ingredients in Corydalis soxicola on rat hepatic stellate cell-T6 based on composition-activity relationship

Objective To establish the composition-activity relationship (CAR) model based on study of chemical composition and relating proliferation inhibitory rate of Corydalis soxicola and recognize the anti-hepatic fibrosis active compounds of C. soxicola. Methods Nine orthogonal C. soxicola extract were analyzed by HPLC, and 21 characteristic peaks were profiled. Anti-hepatic fibrosis activity was investigated by MTT assays on HSC-T6, and the potential active components were identified by scores plot and variable importance in projection (VIP) values by means of orthogonal partial least squares (OPLS) analysis, and the activities of identified components were verified by MTT and flow cytometry. LDH kit was used to detect the effect of dehydrocavidine, palmatine, and berberine on LDH activity. Results The results showed that six peaks including peaks 13, 14, 16, 18, 19, and 20 were significantly related to anti-hepatic fibrosis activity among nine orthogonal extract from C. soxicola. Peaks 18, 19, and 20 were characterized as dehydrocavidine, palmatine, and berberine, respectively. MTT assay showed that dehydrocavidine, palmatine, and berberine with various concentration significantly inhibited the proliferation of HSC-T6 cells. It was also found in flow cytometry that the apoptotic rates of dehydrocavidine, palmatine, and berberine (0.10 mg/mL) on HSC-T6 were 42.12%, 42.22%, and 36.73%, respectively, which were obviously higher than that of control (1.69%, P<0.01). No obvious cytotoxic effect was found when the final concentration of dehydrocavidine, palmatine, and berberine were less than 0.15, 0.10, and 0.10 mg/mL, respectively. Conclusion In this study, it was for the first time found that dehydrocavidine, palmatine, and berberine in C. soxicola extract can effectively inhibit the proliferation and induce apoptosis of HSC-T6 based on composition-activity relationship, and there was no obvious cytotoxic effect of the effective concentration, which showed that they may be the active components with potential anti-hepatic fibrosis effect and have a certain security in the application in C. soxicola. At the same time, it also suggests that the research ideas based on CAR can provide an effective method for the identification of active components in natural plants.