TPMPA
関連概念 : 化学

[(1,2,5,6-tetrahydropyridine-4-yl)methylphosphinic acid]

C6H12NO2P.0.4H2O(168.35)。

   

GABAC受容体の選択的競合的阻害剤(Murata,1996)。

【特徴】

   

 ◆GABAC受容体の阻害剤(Murata,1996)
     解離定数Kb 2.1uM(Ragozzino,1996)
     高濃度GABAでは阻害できない(Short-Term Depression at the Reciprocal Synapses between a Retinal Bipolar Cell Terminal and Amacrine Cells
       (Ragozzino,1996)
       ρ1よりρ2に効く傾向(Pan,Qian,2005)
        ヒトρ1受容体ではρ2受容体の8倍の感度(Chebib,1998)
       ρ1,2問わずA-よりB-typeへの効果弱い(Pan,Qian,2005)
   ・GABAA受容体の阻害剤(Kb 320uM)
     τoffは0.46ms(Microscopic kinetics and energetics distinguish GABAA receptor agonists from antagonists)
   ・GABAB受容体の作動剤(EC50 500uM)
 ◆水溶性<100mM
 ◆非特異的効果(GABA responses of rod bipolar cells in rabbit retinal slices; GABAA and GABAC receptors in adult porcine cones: evidence from a photoreceptor-glia co-culture model

【濃度】

  50uM(Switching between transient and sustained signaling at the rod bipolar-AII amacrine cell synapse of the mouse retina; Fast neurotransmitter release triggered by Ca2+ influx through AMPA-type glutamate receptors)
  150uM(Activation of the Tonic GABAC Receptor Current in Retinal Bipolar Cell Terminals by Non-Vesicular GABA Release

2011/06/02 masashi tanaka

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