An opioid narcotics used for the treatment of moderate-to-severe pain that primarily exert their analgesic effects through μ receptors. Although, traditional μ agonists can cause undesired side effects, including tolerance, addition of δ antagonists can attenuate said side effects. The present invention includes 4a,9-dihydroxy-7a-(hydroxymethyl)-3 -methyl-2,3,4,4a,5,6-hexahydro-1 H-4, 12-methanobenzofuro[3,2-e]isoquinolin-7(7aH)-one (UMB 425) a 5,14-bridged morphinan-based orvinol precursor, along with analogs of morphine, dihydromorphine, hydromorphone, codeine, dihydrocodeine, hydrocodone and ethylmorphine. Although UMB 425 lacks δ-specific motifs, conformationally sampled pharmacophore models for μ and δ receptors predict it to have efficacy similar to morphine at μ receptors and similar to naltrexone at δ receptors, due to the compound sampling conformations in which the hydroxyl moiety interacts with the receptors similar to orvinols. UMB 425 exhibits a mixed μ agonist/δ antagonist profile as determined in receptor binding. UMB 425 has mixed μ agonist/δ antagonist properties in vitro that translate to reduced tolerance liabilities in vivo.
一种用于治疗中至重度疼痛的阿片类
镇痛药物,主要通过μ受体发挥其镇痛作用。尽管传统的μ激动剂可能引起不良副作用,包括耐受性,但添加δ
拮抗剂可以减轻这些副作用。本发明包括4a,9-二羟基-7a-(
羟甲基)-3-
甲基-2,
3,4,4a,5,6-六
氢-1 H-4,1
2-甲基苯并呋喃[3,2-e]
异喹啉-7(7aH)-
酮(UMB 425),一种基于5,14-桥联
吗啡酮的奥维诺前体,以及
吗啡、二
氢吗啡、羟
吗啡、
可待因、二
氢可待因、
羟考酮和
乙基吗啡的类似物。尽管UMB 425缺乏δ特异性基序,但μ和δ受体的构象采样药效模型预测其在μ受体上具有类似
吗啡的功效,在δ受体上类似于
纳曲酮,因为该化合物在构象采样中与受体相互作用的羟基部分类似于奥维诺
酮。UMB 425在受体结合中表现出混合的μ激动剂/δ
拮抗剂特性。UMB 425在体外表现出混合的μ激动剂/δ
拮抗剂特性,这在体内转化为降低的耐受性风险。