应用优化高胆红素HepaRG细胞模型筛选茵栀黄含药血清中的潜在药效物质

Screening for potential bioactive components of Yin-zhi-huang using high bilirubin HepaRG cells incubating with serum from animals

本研究建立了一种优化的高胆红素细胞模型,以模拟人体黄疸病理状态,并进行细胞水平的茵栀黄药效物质筛选。用胆红素及丙磺舒共同孵育HepaRG细胞建立细胞模型;收集给予茵栀黄注射液后大鼠含药血清,测定经此含药血清干预后细胞内总胆红素、间接胆红素及细胞外直接胆红素含量;应用LC-MS/MS的动态多反应监测技术测定茵栀黄注射液中的复杂药物成分,并检测含药血清孵育后与HepaRG细胞结合(或进入细胞内)的药物组分。本研究动物实验遵守兰州大学第一医院伦理委员会规程。结果显示,经40μg·mL^(-1)胆红素及50μg·mL^(-1)丙磺舒共同孵育可建立48 h内稳定的高胆红素HepaRG细胞模型;本研究证实,茵栀黄注射液孵育高胆红素细胞模型后,细胞内总胆红素及间接胆红素含量可分别降低52.4%及60.1%,而细胞外直接胆红素含量可升高52.5%。DMRM模式可对53种药物成分进行测定,经含药血清孵育HepaRG细胞系后可从中筛选出8种潜在药效物质。本研究发现茵栀黄注射液在高胆红素细胞模型中具有显著退黄作用,应用本方法可成功筛选出茵栀黄注射液进入靶细胞内发挥作用的潜在药效物质。该方法简单、高效、灵敏、特异,可为中药药效物质的高通量筛选提供一种新的研究思路。

A hyper-bilirubin cell model was established for its relevance to the pathological state of jaundice in human. This model was used to screen for the pharmacological components of Yin-Zhi-huang (YZH). Total bilirubin, indirect bilirubin in cells, and direct bilirubin in extracellular fluid were quantified after HepaRG cells were incubated with serum from rats injected with multiple components of YZH. Cellular uptake was determined by dynamic multiple reaction monitoring (DMRM) using LC-MS/MS. We found that the stable hyper-bilirubin HepaRG cell model could be established by incubating cells with 40 μg·mL-1 bilirubin and 50 μg·mL-1 probenecid. When the hyper-bilirubin cell model was incubated with serum from rats of YZH injection, there were 52.4% and 60.1% decrease in intercellular total bilirubin and indirect bilirubin, respectively, and 52.5% increase in extracellular direct bilirubin. Using DMRM mode, 53 components could be determined, and 8 potential bioactive candidates were identified from the serum. This method could be used to screen for bioactive metabolites of YZH. This strategy is simple, highly active, sensitive and specific, providing a new method for high throughput screening of therapeutic or toxic metabolites from traditional Chinese medicine. The regulations of Ethics Committee in the First Hospital of Lanzhou University were abided in the rat experiment of this study.