UR-DEBa242: A Py-5-Labeled Fluorescent Multipurpose Probe for Investigations on the Histamine H<sub>3</sub> and H<sub>4</sub> Receptors
作者:Edith Bartole、Lukas Grätz、Timo Littmann、David Wifling、Ulla Seibel、Armin Buschauer、Günther Bernhardt
DOI:10.1021/acs.jmedchem.0c00160
日期:2020.5.28
fluorescent probes for the histamine H3 receptor (H3R) and especially for the H4R orthologs [e.g., human (h) and mouse (m)] are highly needed as versatile complementary tools to radioligands. In view of fluorescent probes for BRET-based binding studies and for localizing the H4R in live cells, we synthesized and biologically characterized Py-5-labeled histamine derivatives. The most notable compound
非常需要用于组胺H3受体(H3R)尤其是H4R直系同源物[例如人(h)和小鼠(m)]的具有全面特征的荧光探针,作为放射性配体的通用补充工具。鉴于荧光探针用于基于BRET的结合研究和在活细胞中定位H4R,我们合成了Py-5标记的组胺衍生物并对其进行了生物学表征。最著名的化合物是UR-DEBa242(26,1- [4-(1H-咪唑-4-基)丁基] -4-(1E,3E)-4- [4-(二甲基氨基)苯基] buta-1 ,3-二烯基} -2,6-二甲基吡啶氢三氟乙酸盐三氟乙酸盐),在hH3R [pEC50(报告基因)8.77]上起部分激动剂的作用,在h / mH4Rs [pIC50(报告基因)8.76]上起反向激动剂/拮抗剂的作用。 /7.08; pIC50 / pKb(β-arrestin2)7.81 / 7.30]。在共聚焦显微镜下 26个被证明适合在活细胞中进行hH4R定位和运输研究。在NLuc-hH3