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Caco-2细胞模型及其P-gp转运功能研究 被引量:3

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摘要 Caco-2细胞单层模型是研究药物吸收特性的重要工具,而P-糖蛋白(P-gp)对许多药物的药代动力学和药效学具有调控作用。对Caco-2细胞单层模型及P-gp功能进行研究,以便研究药物的体外转运机制。常规培养下,Caco-2细胞以2×105个/m L的密度接种400μL于Millicell培养皿中,通过观察细胞形态,绘制生长曲线,测定跨膜电阻值,检测细胞极性和罗丹明转运效率等对构建的细胞模型进行验证。结果:培养21 d后,细胞间形成紧密连接;跨膜电阻值达到恒定值,为(849±17)Ω·cm2;肠腔侧碱性磷酸酶活性显著高于基底侧酶活性,细胞形成极性分化,P-gp底物罗丹明在Caco-2单层细胞的表观通透系数(Papp)比值大于1.5(P(B→A)/P(A→B)>1.5),加入P-gp抑制剂后P(B→A)/P(A→B)小于1.5。研究表明,构建的Caco-2细胞模型结构和生化作用与小肠上皮细胞相似,细胞模型具有完整性、紧密性,细胞发生极性分化形成肠绒毛结构,且P-gp功能良好,可作为研究药物体外转运的模型。
出处 《畜牧与兽医》 北大核心 2015年第4期86-90,共5页 Animal Husbandry & Veterinary Medicine
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参考文献27

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