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D-Serine破坏了Cbln1和GluD1的相互作用,并影响了Cbln1依赖的突触效应和中枢杏仁体中的有害反应

Siddhesh S Sabnis¹, Kishore Kumar S Narasimhan¹, Poojashree B Chettiar¹

¹Department of Psychiatry and Behavioral Sciences, Health Sciences Center, School of Medicine, Texas A&M University, 206, Olsen Blvd, Reynolds Medical Sciences Bldg, College Station, TX, 77845, USA.

Cellular and molecular life sciences : CMLS

|January 31, 2025

概括

D-氨酸与谷氨酸三元1受体 (GluD1) 的结合抑制了它们与Cbln1.1的相互作用. 这种调制影响了突触可塑性和疼痛感知,揭示了D-素在中枢神经系统中的新角色.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
突触性可塑性突触性可塑性

背景情况:

离子型谷氨酸受体 (iGluRs) 对于刺激性神经传递至关重要.
氨酸作为NMDA受体的联合激动剂和谷氨酸三角体受体 (GluDs) 的低亲和性联体作用.
虽然D-素影响GluD2介导的突触可塑性,但其与GluD1和Cbln1的作用尚不清楚.

研究的目的:

为了研究D-氨酸对Cbln1和GluD1.1之间的相互作用的影响.
确定这种相互作用对突触传输和行为的功能后果.
探索D-氨酸在调节Cbln1诱导的突触生成和疼痛中的作用.

主要方法:

在体外细胞结合测试以评估Cbln1-GluD1相互作用.
中枢桃体 (CeA) 切片中的ex vivo电生理学.
在动物模型中进行了涉及CeA内注射的行为研究.

主要成果:

D-氨酸以度依赖的方式 (IC50 ~ 300μM) 抑制了Cbln1-GluD1相互作用.
重组Cbln1在CeA切片中增加了刺激性神经传递和GluD1表达,D-素部分阻断了这种效应.
在行为疼痛模型中,D-氨酸抑制了Cbln1的前感觉和反感觉效应.

结论:

D-氨酸与GluD1的结合减少了它与合成性联体Cbln1.1的相互作用.
这种D-氨酸的相互作用调制与突触可塑性有关.
D-氨酸影响Cbln1介导的突触功能和疼痛行为,这表明一种新的调节机制.

关键词:

在Cbln1中.中央杏仁体中的桃体慢性疼痛是一种慢性疼痛.D - 氨酸是什么?在 GluD1 中,GluD1 是没有防御性的行为.

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