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    • 61. 发明申请
    • MRI probes of membrane potential
    • 膜电位的MRI探针
    • US20040230044A1
    • 2004-11-18
    • US10700712
    • 2003-11-03
    • The Regents of the University of California
    • Angelique LouieJames Ross
    • C07F005/00
    • G01R33/5601A61K49/085A61K49/10A61K49/106A61K51/0446A61K51/0482A61K51/0497C07D491/10C07D491/107Y10T436/24
    • The invention provides methods and compositions for molecular resonance imaging of membrane potential. The compositions comprise an indicator moiety attached through an optional linker to a macrocycle component that binds a lanthanide. The indicator moiety changes conformation in response to alterations in membrane potential and alters the interaction of the bound lanthanide with water. This alteration produces a detectable change in MRI signal , notably the T1 value. A preferred indicator moiety is spiropyran as it exhibits membrane-potential driven interconversions between the closed-ring spiropyran conformer and the extended merocyanine conformer. A preferred macrocycle is DO3A, known to bind gadolinium and an established MRI contrast agent. The methods of the invention comprise in vivo and in vitro uses of compositions of the invention to obtain MRI images that provide information about membrane potential.
    • 本发明提供膜电位分子共振成像的方法和组合物。 组合物包含通过任选的接头连接到结合镧系元素的大环组分的指示剂部分。 指示剂部分响应于膜电位的变化而改变构象,并改变结合的镧系元素与水的相互作用。 这种改变产生了可检测的MRI信号变化,特别是T1值。 优选的指示剂部分是螺吡喃,因为它表现出闭环螺吡喃构象异构体与延伸的部花青同系异构体之间的膜电位驱动的相互转换。 已知的优选的大环是DO3A,已知结合钆和已建立的MRI造影剂。 本发明的方法包括体内和体外使用本发明的组合物以获得提供关于膜电位的信息的MRI图像。