کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5810177 1556216 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of layers of the rat airway epithelial cell line RL-65 for permeability screening of inhaled drug candidates
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی اکتشاف دارویی
پیش نمایش صفحه اول مقاله
Evaluation of layers of the rat airway epithelial cell line RL-65 for permeability screening of inhaled drug candidates
چکیده انگلیسی

A rat respiratory epithelial cell culture system for in vitro prediction of drug pulmonary absorption is currently lacking. Such a model may however enhance the understanding of interspecies differences in inhaled drug pharmacokinetics by filling the gap between human in vitro and rat in/ex vivo drug permeability screens. The rat airway epithelial cell line RL-65 was cultured on Transwell® inserts for up to 21 days at an air-liquid (AL) interface and cell layers were evaluated for their suitability as a drug permeability measurement tool. These layers were found to be morphologically representative of the bronchial/bronchiolar epithelium when cultured for 8 days in a defined serum-free medium. In addition, RL-65 layers developed epithelial barrier properties with a transepithelial electrical resistance (TEER) >300 Ω cm2 and apparent 14C-mannitol permeability (Papp) values between 0.5-3.0 × 10−6 cm/s; i.e., in the same range as established in vitro human bronchial epithelial absorption models. Expression of P-glycoprotein was confirmed by gene analysis and immunohistochemistry. Nevertheless, no vectorial transport of the established substrates 3H-digoxin and Rhodamine123 was observed across the layers. Although preliminary, this study shows RL-65 cell layers have the potential to become a useful in vitro screening tool in the pre-clinical development of inhaled drug candidates.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Pharmaceutical Sciences - Volume 47, Issue 2, 29 September 2012, Pages 481-489
نویسندگان
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