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Xanomeline新型衍生物SBG-PK-014促进APPsw的α-剪切

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Keywords: xanomeline,SBG-PK-014,M1受体激动剂,阿尔茨海默病,衰老

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Abstract:

研究了xanomeline新型衍生物SBG-PK-014对毒蕈碱型M1乙酰胆碱受体的激活能力以及对APP基因瑞典型突变体(APPsw)的α-剪切的作用.利用M1激动剂筛选细胞模型检测了SBG-PK-014的EC50和最大响应倍数(FAmax),并在小鼠神经母细胞瘤N2a细胞中同时过表达APPsw和M1受体,分析了该化合物和xanomeline对sAPPα分泌的影响.结果显示,SBG-PK-014的EC50(40.2nmol/L)与xanomeline(28.4nmol/L)接近,但FAmax是xanomeline的3.5倍.SBG-PK-014通过激活M1受体促进APPsw的α-剪切,且在0.1μmol/L和1μmol/L的浓度下,其效果显著强于同剂量的xanomeline.可见,SBG-PK-014比xanomeline更能有效地激活M1受体,还能促进APPsw的α-剪切和神经保护性sAPPα的生成,在调节阿尔茨海默病的Aβ病理途径上可能有一定潜力,值得进一步研究.

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