Characterization of Nucleobase Transport by Mouse Sertoli Cell Line TM4(Biopharmacy)
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概要
- 論文の詳細を見る
In the spermatogenesis, many nucleosides and nucleobases are needed for the salvage nucleotide biosynthesis. One of the roles of Sertoli cells is to provide such nutrients to spermatogenic cells located within the blood-testis barrier (BTB). We have already shown that nucleoside transporters are expressed and are functional in primary-cultured rat Sertoli cells and TM4 cells derived from mouse testis. Here, we examined the uptakes of purine ([^3H]guanine) and pyrimidine ([^3H]uracil) nucleobases using TM4 cells. Uptakes of both nucleobases were time- and concentration-dependent, and kinetic analysis indicated the involvement of high-affinity transport systems. Uptake of uracil was significantly reduced in the absence of Na^+, although guanine uptake was mainly mediated by a sodium-independent transport system in TM4 cells. Guanine uptake was inhibited by other purine nucleobases, but not by pyrimidine nucleobases. Only pyrimidine nucleobases reduced uracil uptake. In addition, mycophenolic acid, an inosine monophosphate dehydrogenase inhibitor, up-regulated guanine uptake. These results suggested that there are distinct transport systems for purine and pyrimidine nucleobases in cells of mouse Sertoli cell line TM4.
- 公益社団法人日本薬学会の論文
- 2009-03-01
著者
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Kato Ryo
Department Of Chemistry Graduate School Of Science Tohoku University
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Tamai Ikumi
Department Of Membrane Transport And Pharmacokinetics Faculty Of Pharmacy Institute Of Medical Pharm
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Tamai Ikumi
Department Of Membrane Transport And Pharmacokinetics Faculty Of Pharmaceutical Sciences Tokyo Unive
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Tamai Ikumi
Department Of Molecular Biopharmaceutics Faculty Of Pharmaceutical Sciences Tokyo University Of Scie
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MAEDA Tomoji
Department of Membrane Transport and Pharmacokinetics, Faculty of Pharmaceutical Sciences, Tokyo Uni
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AKAIKE Toshihiro
Department of Biomolecular Engineering, Faculty of Bioscience and Biotechnology, Tokyo Institute of
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Kato Ryo
Department Of Biomolecular Engineering Graduate School Of Bioscience And Biotechnology Tokyo Institu
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Kato Ryo
Department Of Molecular Biopharmaceutics Faculty Of Pharmaceutical Sciences Tokyo University Of Scie
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Maeda Tomoji
Department Of Membrane Transport And Pharmacokinetics Faculty Of Pharmaceutical Sciences Tokyo Unive
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Maeda Tomoji
Department Of Molecular Biopharmaceutics Faculty Of Pharmaceutical Sciences Tokyo University Of Scie
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Akaike Toshihiro
Department Of Biomolecular Engineering Faculty Of Bioscience And Biotechnology Tokyo Institute Of Te
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Akaike Toshihiro
Department Of Biomolecular Engineering Graduate School Of Bioscience And Biotechnology Tokyo Institu
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