目的观察中华眼镜蛇毒活性组分(China cobra venom active factor,CCVAF)对新生牛肺主动脉血管内皮细胞增殖的抑制作用,并探讨其抑制细胞增殖的胞内机制。方法采用胰酶消化法体外培养新生牛肺主动脉血管内皮细胞,将不同浓度的CCVAF与细胞在高血清、VEGF条件下共孵育,应用MTT法检测细胞增殖,免疫组化方法检测各组c-myc,c-fos,PCNA表达。结果CCVAF终浓度为1.25,2.5,5.0μg/ml,对常规培养的细胞增殖抑制率分别为22%,54%,83%,对VEGF诱导的体外培养的细胞增殖抑制率分别为18%,39%,72%,对高血清诱导的细胞增殖抑制率分别为20%,44%,79%;CCVAF终浓度为2.5μg/ml,c-myc,c-fos及PCNA阳性细胞标记指数比对照组分别降低89.7%,47.1%及88.0%。结论CCVAF可抑制常规培养的、VEGF及高血清诱导的新生牛肺主动脉血管内皮细胞增殖,这种抑制作用呈剂量依赖性;抑制胞内c-myc,c-fos,PCNA的表达可能是其抑制细胞增殖的机制之一。CCVAF抑制血管内皮细胞增殖作用可能在抗血管生成方面具有重要意义。
We developed a chiral HPLC method for the separation and analysis ofnaftopidil enantiomers. The two enantiomers of naflopidil were separated using a Chiralpak AD-H （250 mm×4.6 mm, 5 μm） column and monitored at the wavelength of 283 nm. The isocratic mobile phase consisting of hexane-isopropanol-diethylamine （85：15：0.1, v/v/v） was pumped at a flow rate of 1.0 mL/min. Under these chromatographic conditions, R-naflopidil and S-naftopidil were well separated and had good linearity in the ranges of 0.78-50 μg/mL （r = 0.9999） and 0.84-54 μg/mL （r = 0.9998）, respectively. The relative standard deviations （RSD） of intra- and inter-day assays were no more than 0.5% and 0.7%, respectively. This improved method for the separation and quantitative determination of naflopidil enantiomers can be used for the quality control of synthesized naflopidil product.
