Bioluminescence imaging of G protein-coupled receptor activation in living mice.

Bioluminescence imaging of G protein-coupled receptor activation in living mice.
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DOI:
10.1038/s41467-017-01340-7
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发表时间:
2017-10-27
影响因子:
16.6
通讯作者:
Proia RL
Proia RL
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kono M;Conlon EG;Lux SY;Yanagida K;Hla T;Proia RL

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G蛋白偶联受体(GPCR),一个细胞表面受体的超家族,参与几乎所有的生理过程,是批准药物的主要目标类别。在活体动物中真实的成像GPCR激活将为研究它们在生物学和疾病中的作用提供一种强有力的方法。在这里,我们描述了一个小鼠模型,使生物发光检测GPCR激活的真实的时间,利用临床上重要的GPCR,鞘氨醇-1-磷酸受体1(S1 P1)。合成的S1 P1信号通路,旨在报告S1 P1和β-arrestin 2之间的相互作用,通过萤火虫分裂荧光素酶片段互补系统,在这些小鼠中进行遗传编码。在受体活化和随后的β-抑制蛋白2募集后,产生活性荧光素酶复合物,其可通过体内生物发光成像检测。这种成像策略揭示了体内正常和病理生理背景下S1 P1激活的动力学和空间特异性,并可应用于其他GPCR。G蛋白偶联受体参与多种生理功能,因此,它们是潜在的药物靶点。Kono等人描述了一种新的小鼠模型,通过利用萤火虫分裂荧光素酶片段互补(可通过生物发光成像检测)实时成像GPCR激活。
G protein-coupled receptors (GPCRs), a superfamily of cell-surface receptors involved in virtually all physiological processes, are the major target class for approved drugs. Imaging GPCR activation in real time in living animals would provide a powerful way to study their role in biology and disease. Here, we describe a mouse model that enables the bioluminescent detection of GPCR activation in real time by utilizing the clinically important GPCR, sphingosine-1-phosphate receptor 1 (S1P1). A synthetic S1P1 signaling pathway, designed to report the interaction between S1P1 and β-arrestin2 via the firefly split luciferase fragment complementation system, is genetically encoded in these mice. Upon receptor activation and subsequent β-arrestin2 recruitment, an active luciferase enzyme complex is produced, which can be detected by in vivo bioluminescence imaging. This imaging strategy reveals the dynamics and spatial specificity of S1P1 activation in normal and pathophysiologic contexts in vivo and can be applied to other GPCRs. G protein-coupled receptors are involved in numerous physiological functions, thus, they represent potential pharmaceutical targets. Here Kono et al. describe a new mouse model to image GPCR activation in real-time by exploiting firefly split luciferase fragment complementation that can be detected by bioluminescence imaging.
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