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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: TODA, Noboru;

    This research group was organized by the aim of (1) analyzing mechanisms of action of new neurotransmitters on receptors and regulations of receptor function in the brain and peripheral organs and tissues by the use of advanced experimental technique and (2) introducing new concepts of interaction between agonists, receptors, signal-transduction processes and cellular responses. The members of this group carried out their study with the brain, heart, blood vessel, extravascular smooth muscle and cultured cells in vitro and in vivo in various animal species, including rhdents, dogs and monkeys. we discussed with great interests on (1) problems of contrasting of different signal transduction and cellular responses mediated by the same receptor subtypes in the brain and peripheral tissues, (2) physiological roles and pathophysiological implications of recently-determined new nerves in which NO acts as neurotransmitter, (3) some of the so-called selective antagonists of receptor subtypes that are effective only in certain animals species, (4) new mechanisms of agonist action through classic receptor activation that are proposed from findings obtained by advanced technique of analysis, and (5) newly-found receptor-G-protein-second messenger systems. I believe that through the discussion, exchange of ideas and presentation of new findings in this group activity, each of the members greatly contributed to the progress of receptor research and in addition obtained valuable fruits from presentations by others for the future study and broadened the knowledge of receptor characteristics. 中枢神経系:脳内GABA作動性神経からのGABA放出機構の調節には、NOより生成されるONOOが関与する。エタノールによる脳内GABA_A受容体ベンゾジアゼピン受容体複合体機能の修飾には多様性がある(栗山)。エタノールによる大脳皮質細胞のGABA電流の増大にはGABA_A受容体が関与する。側座核のD_2及びD_3レセプターは抑制性、線状体大型細胞のそれは興奮性機能を持つ(笹)。脳のセロトニン作動性神経とアドレナリン作動性神経の間の双方向性の調節機構が存在する(斉藤)。エンドセリン(ET)-1はアストロサイトに対して増殖因子として作用するが、ET-1応答性増殖シグナルの増強は細胞内情報伝達経路の増強による(後藤)。タキキニンNK-3受容体が視床下部の室傍核に存在する。海馬のバゾプレッシン受容体は圧受容器反射を介する血圧調節に関与する(神谷)。心血管系ほか:脳動脈のニコチン及びアセチルコリンによる弛緩反応は、神経終末のニコチン受容体を刺激しNOを伝達物質として遊離することによるが、この神経の働きはコリン作動性神経によってpresynapticに抑制される(戸田)。血管平滑筋のα_受容体サブタイプの識別にG蛋白が関与する。また、α_受容体サブタイプを介した収縮におけるCa^感受性増加機構にプロテインキナーゼC及びボツリヌス毒素感受性G蛋白が関与する(高柳)。血管平滑筋のサイトカイン受容体が、増殖抑制作用を有するNOの生成酵素を誘導する。血管平滑筋への圧力負荷は内皮よりETを遊離して平滑筋増殖を促進する(中木)。虚血・再灌流による心筋障害に細胞のCa-overloadが関与するが、抗虚血薬は抗リゾホスファチジルコリン作用によって、同障害における悪循環を断ち切る(安孫子)。G_q蛋白共役型の血管作動性収縮物質受容体及びG_蛋白共役型のニューロペプチドY受容体はともに異種脱感作を示し、Gs蛋白共役型の甲状腺刺激ホルモン受容体は受容体キナーゼによって同種脱感作をひきおこす(谷山)。 研究代表者: 戸田 昇(滋賀医科大学・医学部・教授) 科学研究費補助金研究成果報告書 研究期間: 1993~1995 課題番号: 05304026 研究種目: 総合研究(A)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ IRDBarrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ IRDBarrow_drop_down
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: TODA, Noboru;

    This research group was organized by the aim of (1) analyzing mechanisms of action of new neurotransmitters on receptors and regulations of receptor function in the brain and peripheral organs and tissues by the use of advanced experimental technique and (2) introducing new concepts of interaction between agonists, receptors, signal-transduction processes and cellular responses. The members of this group carried out their study with the brain, heart, blood vessel, extravascular smooth muscle and cultured cells in vitro and in vivo in various animal species, including rhdents, dogs and monkeys. we discussed with great interests on (1) problems of contrasting of different signal transduction and cellular responses mediated by the same receptor subtypes in the brain and peripheral tissues, (2) physiological roles and pathophysiological implications of recently-determined new nerves in which NO acts as neurotransmitter, (3) some of the so-called selective antagonists of receptor subtypes that are effective only in certain animals species, (4) new mechanisms of agonist action through classic receptor activation that are proposed from findings obtained by advanced technique of analysis, and (5) newly-found receptor-G-protein-second messenger systems. I believe that through the discussion, exchange of ideas and presentation of new findings in this group activity, each of the members greatly contributed to the progress of receptor research and in addition obtained valuable fruits from presentations by others for the future study and broadened the knowledge of receptor characteristics. 中枢神経系:脳内GABA作動性神経からのGABA放出機構の調節には、NOより生成されるONOOが関与する。エタノールによる脳内GABA_A受容体ベンゾジアゼピン受容体複合体機能の修飾には多様性がある(栗山)。エタノールによる大脳皮質細胞のGABA電流の増大にはGABA_A受容体が関与する。側座核のD_2及びD_3レセプターは抑制性、線状体大型細胞のそれは興奮性機能を持つ(笹)。脳のセロトニン作動性神経とアドレナリン作動性神経の間の双方向性の調節機構が存在する(斉藤)。エンドセリン(ET)-1はアストロサイトに対して増殖因子として作用するが、ET-1応答性増殖シグナルの増強は細胞内情報伝達経路の増強による(後藤)。タキキニンNK-3受容体が視床下部の室傍核に存在する。海馬のバゾプレッシン受容体は圧受容器反射を介する血圧調節に関与する(神谷)。心血管系ほか:脳動脈のニコチン及びアセチルコリンによる弛緩反応は、神経終末のニコチン受容体を刺激しNOを伝達物質として遊離することによるが、この神経の働きはコリン作動性神経によってpresynapticに抑制される(戸田)。血管平滑筋のα_受容体サブタイプの識別にG蛋白が関与する。また、α_受容体サブタイプを介した収縮におけるCa^感受性増加機構にプロテインキナーゼC及びボツリヌス毒素感受性G蛋白が関与する(高柳)。血管平滑筋のサイトカイン受容体が、増殖抑制作用を有するNOの生成酵素を誘導する。血管平滑筋への圧力負荷は内皮よりETを遊離して平滑筋増殖を促進する(中木)。虚血・再灌流による心筋障害に細胞のCa-overloadが関与するが、抗虚血薬は抗リゾホスファチジルコリン作用によって、同障害における悪循環を断ち切る(安孫子)。G_q蛋白共役型の血管作動性収縮物質受容体及びG_蛋白共役型のニューロペプチドY受容体はともに異種脱感作を示し、Gs蛋白共役型の甲状腺刺激ホルモン受容体は受容体キナーゼによって同種脱感作をひきおこす(谷山)。 研究代表者: 戸田 昇(滋賀医科大学・医学部・教授) 科学研究費補助金研究成果報告書 研究期間: 1993~1995 課題番号: 05304026 研究種目: 総合研究(A)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ IRDBarrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ IRDBarrow_drop_down
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