7-Hydroxy-(E)-3-phenylmethylene-chroman-4-one analogues as efflux pump inhibitors against Mycobacterium smegmatis mc2 155
作者:Somendu K. Roy、Neela Kumari、Shiv Gupta、Sonika Pahwa、Hemraj Nandanwar、Sanjay M. Jachak
DOI:10.1016/j.ejmech.2013.06.024
日期:2013.8
Efflux pump (EP) induces resistance in mycobacteria and hence could be explored as a new target for the discovery of anti-TB agents. In search for efflux pump inhibitors from natural products, bonducellin, a homoisoflavonoid was isolated from Caesalpinia digyna roots and evaluated for modulation and EP inhibitory activity. Bonducellin showed modulation in the MIC of EtBr by eight fold at a concentration
外排泵(EP)在分枝杆菌中诱导耐药性,因此可以作为发现抗结核病药物的新靶标进行探索。为了从天然产物邦杜菌素中寻找外排泵抑制剂,从洋地黄(Caesalpinia digyna)根中分离了同异黄酮,并对其调制和EP抑制活性进行了评估。Bonducellin在62.5 mg / L的浓度下对EtBr的MIC表现出八倍的调节,并且还表现出显着的EP抑制活性。设计合成方案以通过在苯基亚甲基环上进行修饰来制备7-羟基-(E)-3-苯基亚甲基-苯并二氢吡喃-4-酮的类似物,并在累积和流出试验中评估合成的化合物。类似物1,7 - 11,13 - 15,17和19被认为是良好的调制器和由≥4倍在亚抑制浓度降低的EtBr的MIC。化合物8,13和17是最有效的抑制剂溴化乙锭流出在耻垢分枝杆菌MC 2 155。