1-(Fluoroalkylidene)-1,1-bisphosphonic acids are potent and selective inhibitors of the enzymatic activity of Toxoplasma gondii farnesyl pyrophosphate synthase
作者:Sergio H. Szajnman、Valeria S. Rosso、Leena Malayil、Alyssa Smith、Silvia N. J. Moreno、Roberto Docampo、Juan B. Rodriguez
DOI:10.1039/c1ob06602a
日期:——
α-Fluorinated-1,1-bisphosphonic acids derived from fatty acids were designed, synthesized and biologically evaluated against Trypanosoma cruzi, the etiologic agent of Chagas disease, and against Toxoplasma gondii, the agent responsible for toxoplasmosis, and also towards the target parasitic enzymes farnesyl pyrophosphate synthase of T. cruzi (TcFPPS) and T. gondii (TgFPPS). Interestingly, 1-fluorononylidene-1,1-bisphosphonic acid (compound 43) proved to be an extremely potent inhibitor of the enzymatic activity of TgFPPS at the low nanomolar range, exhibiting an IC50 of 30 nM. This compound was two-fold more potent than risedronate (IC50 = 74 nM) that was taken as a positive control. This enzymatic activity was associated with a strong cell growth inhibition against tachyzoites of T. gondii, with an IC50 value of 2.7 μM.
研究人员设计、合成了源自脂肪酸的α-氟化-1,1-二膦酸,并针对南美锥虫病病原体克鲁氏锥虫和弓形虫(弓形虫是弓形虫病的病原体)以及克鲁氏锥虫(TcFPPS)和弓形虫(TgFPPS)的目标寄生酶焦磷酸法尼基合成酶进行了生物评估。有趣的是,1-氟壬亚基-1,1-二膦酸(化合物 43)在低纳摩尔范围内对 TgFPPS 的酶活性具有极强的抑制作用,IC50 为 30 nM。与作为阳性对照的利塞膦酸(IC50 = 74 nM)相比,该化合物的效力高出两倍。这种酶活性对淋病双球菌的细胞生长有很强的抑制作用,IC50 值为 2.7 μM。