Synthesis and biology of ring-modified l-Histidine containing thyrotropin-releasing hormone (TRH) analogues
作者:Chhuttan L. Meena、Avinash Thakur、Prajwal P. Nandekar、Shyam S. Sharma、Abhay T. Sangamwar、Rahul Jain
DOI:10.1016/j.ejmech.2016.01.038
日期:2016.3
Thyrotropin-releasing hormone (TRH) analogues bearing halogen groups (Cl, Br and I) at the C-2 and/or C-5 position, and the alkyl group (CH3, C2H5, C3H7, CH2C6H5) at the N-1 position of the imidazole ring of the central histidine residue were synthesized and evaluated for the receptor binding, calcium mobilization (FLIPR), and IP-1 assay at the HEK mTRHR1 and HEK mTRHR2 expressing cell lines. The most
促甲状腺激素释放激素(TRH)类似物,在C-2和/或C-5位置带有卤素基团(Cl,Br和I),以及烷基(CH 3,C 2 H 5,C 3 H 7,CH合成中央组氨酸残基咪唑环N-1位置的2 C 6 H 5)并评估在HEK mTRHR1和HEK mTRHR2表达细胞上的受体结合,钙动员(FLIPR)和IP-1分析线。最有前途的模拟7k在IP-1分析中显示对HEK mTRH-R2受体亚型具有925倍的选择性,在FLIPR分析中显示对HEK mTRH-R2受体亚型具有272倍的选择性,对HEK TRH-R2受体亚型具有21倍的受体结合特异性。在脑膜竞争结合试验中体外评估了肽7k,并在体内存在TRH-DE的情况下进行了稳定性分析。在戊巴比妥诱导的睡眠试验中,类似物7k的睡眠时间减少了76%以上,并且体内血液中的TSH水平升高幅度相对较小。TRH-R1和TRH-R2的计算同源性建模以及与最有效的7k