however, is still lacking. Here, we report a "turn-on" fluorescent probe (A1CA) for visualizing TRPA1 channels in the plasma membrane of live cells based on a photochromic ligand derived from 4-(phenylazo)benzenamine. Evaluating the specificity and sensitivity of A1CA by electrophysiology and confocal imaging showed that the A1CA probe displays higher affinity and selectivity to TRPA1 channel versus
荧光探针因其高选择性,灵敏度和时空分辨率而被用作在
生物系统中分析蛋白质的有效方法。然而,仍然缺乏用于理解瞬时受体电位锚蛋白1(TRPA1)通道功能的特异性荧光探针,该通道与各种疾病如持续性疼痛,呼吸道疾病和慢性瘙痒综合征密切相关。在这里,我们报告一个“打开”荧光探针(A1CA)可视化的活细胞的质膜中的TRPA1通道的基础上,派生自4-(phenylazo)benzenamine的光致变色
配体。通过电生理学和共聚焦成像评估A1CA的特异性和敏感性表明,与所有其他离子通道(包括TRPV1,TRPV3,Nav1.4,Nav1.5和hERG)相比,A1CA探针对TRPA1通道的亲和力和选择性更高。基于支持性证据,A1CA作为分子成像探针在高通量筛选新型TRPA1激动剂方面具有巨大潜力。