Chain branching approach in structure modification of TRPV1 receptor antagonist MK056 and its analogs
作者:Mijung Jang、Chong Hyun Ryu、Young-Ho Park、Hee-Doo Kim
DOI:10.1007/s12272-012-0212-x
日期:2012.2
A series of chain branched 1,3-dibenzylthiourea derivatives were designed, synthesized, and evaluated for their antagonist activity against TRPV1. The synthesized chain branched 1,3-dibenzylthioureas 9a-g were tested for their antagonist activities against TRPV1 by 45Ca2+-influx assay using neonatal rat cultured spinal sensory neurons. Fluorinated ethyl-branched analog 9g showed the most potent antagonist activity with an IC50 value of 0.41 μM, but all of the chain branched analogs were less potent than the parent compounds MK-056 and SC-0030, indicating that chain branching on the benzylic position of B-ring is detrimental to potency. Optimized receptor binding seems to be interfered by chain branching, and resulted in decrease in potency.
一系列链支化的1,3-二苄基硫脲衍生物被设计、合成,并评估其对TRPV1的拮抗活性。合成的链支化1,3-二苄基硫脲9a-g通过使用新生大鼠培养脊髓感觉神经元的45Ca2+流入实验进行了拮抗活性测试。氟化乙基支化类似物9g表现出最强的拮抗活性,其IC50值为0.41 μM,但所有链支化类似物的活性均低于母体化合物MK-056和SC-0030,这表明B环苄基位置的链支化对活性有不利影响。优化的受体结合似乎受到链支化的干扰,导致活性降低。