Synthesis, Receptor Binding, and CNS Pharmacological Studies of New Thyrotropin‐Releasing Hormone (TRH) Analogues
作者:Vikramdeep Monga、Chhuttan L. Meena、Satyendra Rajput、Chandrashekhar Pawar、Shyam S. Sharma、Xinping Lu、Marvin C. Gershengorn、Rahul Jain
DOI:10.1002/cmdc.201000481
日期:2011.3.7
our search for selective and CNS‐active thyrotropin‐releasing hormone (TRH) analogues, we synthesized a set of 44 new analogues in which His and pGlu residues were modified or replaced. The analogues were evaluated as agonists at TRH‐R1 and TRH‐R2 in cells in vitro, and in vivo in mice for analeptic and anticonvulsant activities. Several analogues bound to TRH‐R1 and TRH‐R2 with good to moderate affinities
作为我们寻找选择性和 CNS 活性促甲状腺激素释放激素 (TRH) 类似物的一部分,我们合成了一组 44 种新类似物,其中 His 和 pGlu 残基被修饰或替换。这些类似物在体外细胞中作为 TRH-R1 和 TRH-R2 激动剂进行评估,在小鼠体内评估其兴奋剂和抗惊厥活性。几种与 TRH-R1 和 TRH-R2 结合的类似物具有良好到中等的亲和力,并且是两种受体亚型的完全激动剂。具体而言,类似物21a (R=CH 3 )对 TRH-R1 的结合亲和力(K i值)为 0.17 μ M和 0.016 μ M对于 TRH-R2;它与 TRH-R1 的结合力比 TRH 低 10 倍,而与 TRH-R2 的结合力与 TRH 相当。化合物21a 是最具选择性的激动剂,以 0.0021 μM的效力(EC 50值)激活 TRH-R2 ,但在 EC 50 =0.05 μM 时激活 TRH-R1 ,并且对 TRH-R2