A high sensitive method based on liquid chromatography tandem mass spectrometry（LC-MS/MS） was developed and validated for the study of permeability of danshensu（DS） and paeoniflorin（PF） in Caco-2 intestinal abso...A high sensitive method based on liquid chromatography tandem mass spectrometry（LC-MS/MS） was developed and validated for the study of permeability of danshensu（DS） and paeoniflorin（PF） in Caco-2 intestinal absorption model. The DS and PF were extracted from cell culture by vacuum-lyophilizing and then separated on a Zorbax Stable Bond C18 column with 0.1% acetic acid aqueous solution and methanol as mobile phase. Detection was carried out by negative electrospray ionization（ESI ） with selected reaction monitoring（SRM） mode. The apparent permeability coefficients（Papp） of DS and PF in Caco-2 cell medium were calculated and the effects of verapamil on the coefficients Papp of the two test compounds were also illustrated. The permeability of PF was much better than that of DS when the two compounds were administrated individually. Co-administration of DS and PF led to the decrease of the transport from apical side to basolateral side for both the compounds. However, the transport in the contrary direction were accelerated. It was also observed that verapamil could accelerate the transport of the test compounds from apical side to basolateral side. However, the absorption-enhanced effect of verapamil was attenuated when DS and PF were co-administrated. These observations suggest that both passive diffusion and active efflux involved in P-gp would effect the passage of DS and PF across Caco-2 cell monolayer. At the same time, the co-administration of DS and PF to an alteration of transport behavior, which suggests that the interaction must be taken into account when ‘n-in-one＇ samples were used in Caco-2 intestinal model.展开更多
目的:研究黄酮类化合物野黄芩苷(scutellarin)和野黄芩素(scutellarein)在Caco-2单层细胞模型中的吸收和转运特性。考察缓冲液、作用时间、P-糖蛋白(P-glycoprotein,P-gp)抑制剂、多药耐药蛋白2(multidrug resistance protein 2,MRP2)...目的:研究黄酮类化合物野黄芩苷(scutellarin)和野黄芩素(scutellarein)在Caco-2单层细胞模型中的吸收和转运特性。考察缓冲液、作用时间、P-糖蛋白(P-glycoprotein,P-gp)抑制剂、多药耐药蛋白2(multidrug resistance protein 2,MRP2)抑制剂、乳腺癌耐药蛋白(breast cancer drug resistance protein,BCRP)抑制剂对野黄芩苷和野黄芩素吸收转运的影响。方法:利用Caco-2单层模型研究从绒毛面(apical,AP)侧到基底面(basolateral,BL)侧以及从BL侧到AP侧两个方向的转运过程。应用高效液相色谱法定量分析,计算转运参数和表观渗透系数(apparent permeability coefficient,Papp)。结果:两化合物在磷酸盐缓冲液和Hanks缓冲液中的Papp有差异。在磷酸盐缓冲液中野黄芩苷AP→BL侧无转运,BL→AP侧的Papp为(0.74～1.58)×10-6cm/s;野黄芩素在AP→BL侧与BL→AP侧的Papp分别为(4.33～6.79)×10-6cm/s和(1.32～2.56)×10-6cm/s。随着时间延长,Papp逐渐下降,野黄芩素的吸收转运优于野黄芩苷。P-gp抑制剂维拉帕米、MRP2抑制剂MK-571钠盐及BCRP抑制剂利血平能够促进野黄芩苷的吸收转运,维拉帕米能促进野黄芩素的吸收转运,MK-571钠盐促进野黄芩素外排。结论:野黄芩苷属于难吸收的化合物,野黄芩素吸收优于野黄芩苷,野黄芩素可通过小肠上皮被动吸收进入体内。P-gp抑制剂能够促进野黄芩苷和野黄芩素的转运,MRP2抑制剂和BCRP抑制剂能够促进野黄芩苷的转运,MRP2抑制剂促进野黄芩素外排。野黄芩苷吸收不良和外排蛋白的作用是造成其生物利用度较低的原因。展开更多
基金the National Basic Research Priorities Program of China(No. 2005CB523402)the Natural Science Foundation of Zhejiang Province,China(No.Y204418)the Program for New Century Excellent Talents in University of China (No.NCET-06-0515)
文摘A high sensitive method based on liquid chromatography tandem mass spectrometry（LC-MS/MS） was developed and validated for the study of permeability of danshensu（DS） and paeoniflorin（PF） in Caco-2 intestinal absorption model. The DS and PF were extracted from cell culture by vacuum-lyophilizing and then separated on a Zorbax Stable Bond C18 column with 0.1% acetic acid aqueous solution and methanol as mobile phase. Detection was carried out by negative electrospray ionization（ESI ） with selected reaction monitoring（SRM） mode. The apparent permeability coefficients（Papp） of DS and PF in Caco-2 cell medium were calculated and the effects of verapamil on the coefficients Papp of the two test compounds were also illustrated. The permeability of PF was much better than that of DS when the two compounds were administrated individually. Co-administration of DS and PF led to the decrease of the transport from apical side to basolateral side for both the compounds. However, the transport in the contrary direction were accelerated. It was also observed that verapamil could accelerate the transport of the test compounds from apical side to basolateral side. However, the absorption-enhanced effect of verapamil was attenuated when DS and PF were co-administrated. These observations suggest that both passive diffusion and active efflux involved in P-gp would effect the passage of DS and PF across Caco-2 cell monolayer. At the same time, the co-administration of DS and PF to an alteration of transport behavior, which suggests that the interaction must be taken into account when ‘n-in-one＇ samples were used in Caco-2 intestinal model.
文摘目的:研究黄酮类化合物野黄芩苷(scutellarin)和野黄芩素(scutellarein)在Caco-2单层细胞模型中的吸收和转运特性。考察缓冲液、作用时间、P-糖蛋白(P-glycoprotein,P-gp)抑制剂、多药耐药蛋白2(multidrug resistance protein 2,MRP2)抑制剂、乳腺癌耐药蛋白(breast cancer drug resistance protein,BCRP)抑制剂对野黄芩苷和野黄芩素吸收转运的影响。方法:利用Caco-2单层模型研究从绒毛面(apical,AP)侧到基底面(basolateral,BL)侧以及从BL侧到AP侧两个方向的转运过程。应用高效液相色谱法定量分析,计算转运参数和表观渗透系数(apparent permeability coefficient,Papp)。结果:两化合物在磷酸盐缓冲液和Hanks缓冲液中的Papp有差异。在磷酸盐缓冲液中野黄芩苷AP→BL侧无转运,BL→AP侧的Papp为(0.74～1.58)×10-6cm/s;野黄芩素在AP→BL侧与BL→AP侧的Papp分别为(4.33～6.79)×10-6cm/s和(1.32～2.56)×10-6cm/s。随着时间延长,Papp逐渐下降,野黄芩素的吸收转运优于野黄芩苷。P-gp抑制剂维拉帕米、MRP2抑制剂MK-571钠盐及BCRP抑制剂利血平能够促进野黄芩苷的吸收转运,维拉帕米能促进野黄芩素的吸收转运,MK-571钠盐促进野黄芩素外排。结论:野黄芩苷属于难吸收的化合物,野黄芩素吸收优于野黄芩苷,野黄芩素可通过小肠上皮被动吸收进入体内。P-gp抑制剂能够促进野黄芩苷和野黄芩素的转运,MRP2抑制剂和BCRP抑制剂能够促进野黄芩苷的转运,MRP2抑制剂促进野黄芩素外排。野黄芩苷吸收不良和外排蛋白的作用是造成其生物利用度较低的原因。
