ミツモト　ヤスヒデ   Yasuhide Mitsumoto
  光本　泰秀
   所属   薬学部 薬学科
   職種   教授
言語種別 英語
発行・発表の年月 1988/06
形態種別 学術論文
査読 査読あり
標題 Possible participation of calmodulin in stimulation of leucine transport by concanavalin A in human lymphocytes
執筆形態 共著
掲載誌名 Biochem Biophys Res Commun
掲載区分国外
巻・号・頁 153,pp.570-575
著者・共著者 K Sato, Y Mitsumoto, T Mohri
概要 Stimulation of leucine uptake by addition of concanavalin A, mediated by increase of intracellular free Ca2+ concentration [( Ca2+]), in lymphocytes (Mitsumoto, Y., Sato, K. and Mohri, T. (1988) Biochim. Biophys. Acta 968, 353-358) was abolished by N-(6-aminohexyl)-5-chloro-1-naphthalenesulfonamide (W-7) and chlorpromazine, which inhibited membrane hyperpolarization induced by the mitogen. Quinine (0.5-1 mM) completely inhibited the concanavalin A-induced hyperpolarization and extensively inhibited the induced stimulation of leucine uptake. Based on these results, we suggest that the stimulation of leucine uptake by concanavalin A is largely due to activation of the Ca2+-dependent K+ channel which reinforces negative potential of the plasma membrane and is regulated by calmodulin.