Biphenyl-indanone A, a Positive Allosteric Modulator of the Metabotropic Glutamate Receptor Subtype 2, Has Antipsychotic- and Anxiolytic-Like Effects in Mice
作者:Ruggero Galici、Carrie K. Jones、Kamondanai Hemstapat、Yi Nong、Nicholas G. Echemendia、Lilly C. Williams、Tomas de Paulis、P. Jeffrey Conn
DOI:10.1124/jpet.106.102046
日期:2006.7
Previous studies indicate that agonists of the group II metabotropic glutamate receptors (mGluRs), mGluR2 and mGluR3, may provide a novel approach for the treatment of anxiety disorders and schizophrenia. However, the relative contributions of the mGluR2 and mGluR3 subtypes to the effects of the group II mGluR agonists remain unclear. In the present study, we describe an alternate synthesis and further pharmacological characterization of a recently reported positive allosteric modulator of mGluR2 termed biphenyl-indanone A (BINA). In recombinant systems, BINA produced a robust and selective potentiation of the response of mGluR2 to glutamate with no effect on the glutamate response of other mGluR subtypes. In hippocampal brain slices, BINA (1 μM) significantly potentiated the mGluR2/3 agonist-induced inhibition of excitatory synaptic transmission at the medial perforant path-dentate gyrus synapse. BINA was also efficacious in several models predictive of antipsychotic- and anxiolytic-like activity in mice. The behavioral effects of BINA were blocked by the mGluR2/3 antagonist (2 S )-2-amino-2-[(1 S ,2 S )-2-carboxycycloprop-1-yl]-3-(xanth-9-yl) propanoic acid (LY341495), suggesting that the in vivo effects of BINA are mediated by increased activation of mGluR2. Collectively, these results indicate that BINA is a selective mGluR2 positive allosteric modulator and provide further support for the growing evidence that selective allosteric potentiators of mGluR2 mimic many of the in vivo actions of mGluR2/3 agonists that may predict therapeutic utility of these compounds.
先前的研究表明,II 类代谢型谷氨酸受体 (mGluR)、mGluR2 和 mGluR3 的激动剂可能为治疗焦虑症和精神分裂症提供一种新方法。然而,mGluR2 和 mGluR3 亚型对 II 组 mGluR 激动剂作用的相对贡献仍不清楚。在本研究中,我们描述了最近报道的 mGluR2 正变构调节剂联苯茚满酮 A (BINA) 的替代合成和进一步药理学表征。在重组系统中,BINA 对 mGluR2 对谷氨酸的反应产生强大且选择性的增强,而对其他 mGluR 亚型的谷氨酸反应没有影响。在海马脑切片中,BINA (1 μM) 显着增强 mGluR2/3 激动剂诱导的内侧穿通通路齿状回突触兴奋性突触传递的抑制。 BINA 在几种预测小鼠抗精神病和抗焦虑样活性的模型中也有效。 BINA 的行为效应被 mGluR2/3 拮抗剂 (2 S )-2-amino-2-[(1 S ,2 S )-2-carboxycycloprop-1-yl]-3-(xanth-9-yl) 阻断) 丙酸 (LY341495),表明 BINA 的体内作用是由 mGluR2 激活增加介导的。总的来说,这些结果表明 BINA 是一种选择性 mGluR2 正变构调节剂,并为越来越多的证据提供了进一步的支持,即 mGluR2 的选择性变构增强剂模拟 mGluR2/3 激动剂的许多体内作用,这些作用可能预测这些化合物的治疗效用。