A new VGLUT-specific potent inhibitor: pharmacophore of Brilliant Yellow.

A new VGLUT-specific potent inhibitor: pharmacophore of Brilliant Yellow.
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DOI:
10.1007/s11064-013-1196-8
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发表时间:
2014-01
影响因子:
4.4
通讯作者:
Ueda, Tetsufumi
Ueda, Tetsufumi
中科院分区:
医学3区
文献类型:
--
作者:
Tamura, Yutaka;Ogita, Kiyokazu;Ueda, Tetsufumi

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由囊泡谷氨酸转运蛋白 (VGLUT) 介导的突触囊泡中谷氨酸浓度的增加是谷氨酸突触传递的最初重要步骤。有证据表明,VGLUT 的异常过度表达与中枢神经系统的某些病理生理学有关。 VGLUT 会受到多种药物的抑制。目前已知最有效的 VGLUT 特异性抑制剂是台盼蓝,它带有高电荷,因此具有膜不可渗透性。我们已经找到了一种有效的、VGLUT 特异性的试剂,易于对膜渗透性类似物进行修饰。我们提供的证据表明,Brilliant Yellow 具有有效的 VGLUT 特异性抑制作用,Ki 值为 12 nM。基于构效关系研究和分子模型,我们定义了 VGLUT 亮黄的有效抑制药效团。这项研究为开发一种膜渗透剂提供了新的见解,这种膜渗透剂可以高效地特异性阻断谷氨酸在神经元突触小泡中的积累。
The increased concentration of glutamate in synaptic vesicles, mediated by the vesicular glutamate transporter (VGLUT), is an initial vital step in glutamate synaptic transmission. Evidence indicates that aberrant overexpression of VGLUT is involved in certain pathophysiologies of the central nervous system. VGLUT is subject to inhibition by various types of agents. The most potent VGLUT-specific inhibitor currently known is Trypan Blue, which is highly charged, hence membrane-impermeable. We have sought a potent, VGLUT-specific agent amenable to easy modification to a membrane-permeable analog. We provide evidence that Brilliant Yellow exhibits potent, VGLUT-specific inhibition, with a Ki value of 12 nM. Based upon structure-activity relationship studies and molecular modeling, we have defined the potent inhibitory pharmacophore of VGLUT Brilliant Yellow. This study provides new insight into development of a membrane-permeable agent to lead to specific blockade, with high potency, of accumulation of glutamate into synaptic vesicles in neurons.
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