Exploration of TRPM8 Binding Sites by β-Carboline-Based Antagonists and Their In Vitro Characterization and In Vivo Analgesic Activities
作者:Alessia Bertamino、Carmine Ostacolo、Alicia Medina、Veronica Di Sarno、Gianluigi Lauro、Tania Ciaglia、Vincenzo Vestuto、Giacomo Pepe、Manuela Giovanna Basilicata、Simona Musella、Gerardina Smaldone、Claudia Cristiano、Sara Gonzalez-Rodriguez、Asia Fernandez-Carvajal、Giuseppe Bifulco、Pietro Campiglia、Isabel Gomez-Monterrey、Roberto Russo
DOI:10.1021/acs.jmedchem.0c00816
日期:2020.9.10
Transient receptor potential melastatin 8 (TRPM8) ion channel represents a valuable pharmacological option for several therapeutic areas. Here, a series of conformationally restricted derivatives of the previously described TRPM8 antagonist N,N′-dibenzyl tryptophan 4 were prepared and characterized in vitro by Ca2+-imaging and patch-clamp electrophysiology assays. Molecular modeling studies led to
瞬时受体电位褪黑素8(TRPM8)离子通道代表了几个治疗领域的宝贵药理学选择。在此,制备了先前描述的TRPM8拮抗剂N,N′-二苄基色氨酸4的一系列构象受限的衍生物,并通过Ca 2+成像和膜片钳电生理测定体外表征。分子建模研究导致在TRPM8结合位点内确定了这些衍生物的广泛且明确定义的相互作用网络,这是其拮抗剂活性的基础。(5 R,11a S)-5-(4-氯苯基)-2-(4-氟苄基)-5,6,11,11a-四氢-1 H-咪唑[1',5':1,6]吡啶[3,4-b ]吲哚-1,3(2 H)-二酮(31a)以有效的(IC 50 = 4.10±1.2 nM),选择性且代谢稳定的TRPM8拮抗剂出现。在体内,31a在icilin诱导的WDS(11.5 mg / kg ip),奥沙利铂诱导的冷异常性疼痛(10-30μgsc)和CCI诱导的热痛觉过敏(11.5 mg / kg)中显示出显着的靶标覆盖范围。