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Standardization of an ex vivo method for determination of intestinal permeability of drugs using everted rat intestine apparatus

机译:使用外翻大鼠肠装置测定药物肠道渗透率的前体内方法的标准化

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Introduction: Everted gut sac of rat intestine is a paradigm widely employed for determination of absorption kinetics of drugs along with evaluation of effects of absorption enhancers. Since its inception in 1954, it has been optimized to enhance tissue survival and use, but it still suffers the limitation of small serosal compartment size and lack of validity of single experiment. Methods: The aim of the present work was to standardize a new ex vivo model to study drug absorption using a specially designed glass apparatus, everted segment of rat intestine, and three absorption markers [paracellular (atenolol), transcellular (metoprolol and propranolol)]. To validate a single experiment phenol red was used as non-absorbable marker. Results: The mean apparent permeabilities (Papp) for the markers were found to be 0.054±0.024×10 -4cm/s (atenolol), 0.84±0.14×10 -4cm/s (metoprolol), and 1.64±0.16×10 -4cm/s (propranolol); wherein data from only those experiment was used, which showed negligible absorption of phenol red. Discussion: The model is simple to establish, gives excellent absorption kinetics, and most importantly provides a way to validate the experiment simultaneously. The proposed method can be used in all kinds of drug absorption studies, especially biopharmaceutical investigations studying absorption enhancement strategies.
机译:介绍:大鼠肠道的Everted肠道是一种广泛用于测定药物吸收动力学以及吸收增强剂的影响的范例。自1954年成立以来,它已被优化以增强组织存活率和使用,但仍然遭受小型血清池尺寸的限制和单一实验的缺乏有效性。方法:目前工作的目的是使用专门设计的玻璃设备,大鼠肠道和三个吸收标记物(肺膜(阿替洛尔),薄细胞(美容栓塞和丙醇),标准化新的离体模型来研究药物吸收。 。为了验证单一的实验酚醛,用作不可吸收的标记。结果:发现标记的平均明显渗透率(PAPP)为0.054±0.024×10 -4cm / s(atenolol),0.84±0.14×10 -4cm / s(美容栓塞),1.64±0.16×10 -4cm / s(propranolol);其中仅使用来自那些实验的数据,其显示出可忽略不计的酚红色吸收。讨论:该模型建立简单,提供出色的吸收动力学,最重要的是提供了一种方法来同时验证实验。该方法可用于各种药物吸收研究,尤其是生物制药研究,研究吸收增强策略。

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