Conditionally Immortalized Cell Lines as a New In Vitro Model for the Study of Barrier Functions
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概要
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Conditionally immortalized brain and retinal capillary endothelial and choroid plexus epithelial cell lines were established from a transgenic rat (Tg rat) and mouse (Tg mouse) harboring the temperature-sensitive simian virus 40 (ts SV 40) large T-antigen. These cell lines exhibit temperature-sensitive cell growth due to the expression of ts SV 40 large T-antigen. Mouse brain (TM-BBB) and rat brain (TR-BBB) and rat retinal (TR-iBRB) capillary endothelial cell lines appear to have a spindle-fiber shaped morphology and exhibit the typical endothelial markers, such as von Willebrand factor and acetylated low-density lipoprotein uptake. These cell lines express in vivo influx and efflux transporters, such as P-glycoprotein (P-gp) and GLUT1, which is capable of 3-O-methly-D-glucose transport. TM-BBB cells are able to undergo effulux transport of cyclosporin A, which is a substrate for P-gp transport activity. They may also express oatp2 and exhibit dehydroepiandrosterone sulfate and digoxin uptake activity. TR-BBB cells express the mRNA of multidrug resistance associated protein 1 (MRP1) and a large neutral amino acid transporter, which consists of LAT1 and 4F2hc. TR-iBRB cells exhibit pH-dependent L-lactic acid transport activity and express the mRNA of monocarboxylate transporter (MCT) 1 and 2. The choroid plexus epithelial cell line (TR-CSFB) has polygonal cell morphology, expresses the typical choroid plexus epithelial cell marker, transthyretin, and has Na^+, K^+-ATPase located on the apical side. TR-CSFB cells also exhibit amino acid transport activity which has been observed in vivo. These barrier cell lines established from the Tg rat and Tg mouse have in vivo transport functions and are good in vitro models for drug transport to the brain and retina and as a screen for durgs which might be capable of delivery to the brain and retina.
- 公益社団法人日本薬学会の論文
- 2001-02-01
著者
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Terasaki Tetsuya
Department Of Molecular Biopharmacy And Genetics Graduate School Of Pharmaceutical Sciences Tohoku U
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Terasaki Tetsuya
Department Of Molecular Biopharmacy And Genetics Graduate School Of Pharmaceutical Sciences:new Indu
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Hosoya K
Toyama Medical And Pharmaceutical Univ. Toyama Jpn
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Hosoya Ken-ichi
Department Of Molecular Biopharmacy And Genetics Graduate School Of Pharmaceutical Sciences Tohoku U
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