三伏贴中芥子碱及细辛挥发油促进HaCaT细胞摄取延胡索乙素的作用及其机制研究

Study on mechanism of enhanced HaCaT cellular uptake of tetrahydropalmatine by asarum essential oil and sinapine in Sanfu Patch

目的研究三伏贴中芥子碱硫氰酸盐(SPT)及细辛挥发油(AEO)促进角质形成细胞HaCaT摄取延胡索乙素(THP)的作用及其机制。方法采用MTT法检测SPT、AEO和THP对HaCaT细胞活力的影响;根据方中THP自发荧光的特点,采用激光共聚焦扫描显微镜可视化观察SPT及AEO促进HaCaT细胞摄取THP的作用,并用HPLC法测定HaCaT细胞中THP的量;以1,6-二苯基-1,3,5-己三烯(DPH)为荧光探针,利用荧光偏振技术研究SPT、AEO及THP对HaCaT细胞的细胞膜流动性的影响。结果 SPT及AEO均能显著促进THP被HaCaT细胞摄取,且AEO的促进作用优于SPT。SPT、THP、AEO分别作用于DPH标记的HaCaT细胞后,AEO组HaCaT细胞的荧光偏振度和细胞膜微黏度均显著降低,细胞流动性增加,证明AEO是通过提高细胞膜流动性从而促进HaCaT细胞摄取THP,而THP、SPT均不能增加细胞膜流动性。结论三伏贴中SPT及AEO均可促进HaCaT细胞摄取THP,AEO促进机制与其提高细胞膜流动性相关,而SPT的促进作用不是通过增加细胞膜流动性实现,其具体机制有待进一步探明。

Objective To study the mechanism of enhanced HaCaT cellular uptake of tetrahydropalmatine （THP） by asarum essential oil （AEO） and sinapine thiocyanate （SPT） in Sanfu Patch. Methods Effect of SPT, AEO, and THP on cell viability of HaCaT were determined by MTT. HaCaT cellular uptake of THP and the enhancing effects of AEO and SPT on THP uptake were visualized with confocal laser scanning microscope （CLSM） based on the green autofluorescence of THP, and the THP uptake content by HaCaT was further determined with HPLC. Moreover, HaCaT cells were labeled with diphenylhexatriene （DPH）. After the labeled cells were treated with AEO, SPT, and THE respectively, the cellular membrane fluidity was determined with fluorescence polarization technology. Results THP fluorescence intensity within HaCaT cells was significantly increased when THP was co-delivered with AEO or SPT respectively, and the THP content with each group within the cells was also significantly higher than that of THP delivered alone. In addition, AEO was superior to SPT in enhancing THP uptake by HaCaT cells. The fluorescence polarization and membrane micro-viscosity of HaCaT cells were significantly decreased after AEO treatment, which indicated that membrane fluidity was increased by the treatment with AEO. However, SPT or THP did not present the character of increasing the membrane fluidity. Conclusion HaCaT cellular uptake of THP can be enhanced by AEO and SPT of Sanfu Patch, in which AEO enhances the cellular uptake of THP through increasing the cellular membrane fluidity, while the mechanism of SPT in enhancing THP cellular uptake remains further clarification.