生物活性 | |||
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描述 | GR 103691 is a potent, selective dopamine D3 receptor antagonist with a Ki value of 0.4 nM. GR 103691 shows more than 100-fold selectivity for human dopamine human (h)D3 over hD4 and hD1 sites. GR 103691 shows marked affinity for serotonin1A (5-HT1A) receptors (Ki of 5.8 nM) and α-1 adrenoceptors (Ki of 12.6 nM)[1]. The D(3) antagonist GR 103691 (10 nM) significantly decreased dopamine uptake. D(3) receptor activation increases dopamine uptake in the nucleus accumbens and suggest that this receptor subtype can regulate extracellular dopamine by modulating the DA transporter activity[2]. Low dopamine levels (1 mM) decreased the monosynaptic "stretch" reflex (MSR) amplitude in WT animals and increased it in D3KO animals. Higher dopamine concentrations (10-100 mM) decreased MSR amplitudes in both groups, but always more strongly in WT. GR 103691 and nafadotride increased the MSR (monosynaptic "stretch" reflex) in WT but not in D3KO (D3-receptor knock-out) mice[3]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.06mL 0.41mL 0.21mL |
10.30mL 2.06mL 1.03mL |
20.59mL 4.12mL 2.06mL |
参考文献 |
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