Chalcones possess Michael acceptor property due to the presence of α,β-unsaturated enone moiety in their structure. In the present study, molecular docking was performed to predict binding affinity of ring substituted chalcones with Monoacylglycerol lipase (MAGL), a serine hydrolase enzyme which can inhibited by Michael acceptors such as maleimide derivatives. 3, 4-Dimethoxy derivative, 3h, with -44.45 kJmol-1 of interaction energy, exhibited highest binding affinity and formed Pi-Sulphur interactions with methionine-123 residue of MAGL enzyme. As MAGL is an emerging target for antinociceptive drug development, ring substituted chalcones were synthesized and evaluated for their central antinociceptive activity using tail immersion and hot plate methods. The results revealed that compound 3h, chalcone bearing methoxy groups at 3rd and 4th positions of phenyl ring exhibited good antinociceptive activity in both the models. Good correlation was observed between antinociceptive activity and binding affinity toward MAGL in case of compound 3h.
茚酮具有Michael受体性质,因为它们的结构中存在α,β-不饱和烯酮基团。在本研究中,进行了分子对接实验,以预测环取代茚酮与单酰基甘油酶(MAGL)的结合亲和力,MAGL是一种丝氨酸水解酶酶,可以被Maleimide衍生物等Michael受体抑制。其中,具有交互作用能量-44.45 kJmol-1的3,4-二甲氧基衍生物3h表现出最高的结合亲和力,并与MAGL酶的甲硫氨酸-123残基形成Pi-硫相互作用。由于MAGL是抗疼痛药物开发的新兴靶点,因此合成了环取代茚酮,并利用尾部浸渍和热板法评估了它们的中枢抗疼痛活性。结果显示,具有在苯环的第3和第4位置带有甲氧基团的化合物3h在两种模型中均表现出良好的抗疼痛活性。在化合物3h的情况下,抗疼痛活性与其对MAGL的结合亲和力之间存在良好的相关性。