Discovery of Selective <i>Toxoplasma gondii</i> Dihydrofolate Reductase Inhibitors for the Treatment of Toxoplasmosis
作者:Allen T. Hopper、Adam Brockman、Andy Wise、Julie Gould、Jennifer Barks、Joshua B. Radke、L. David Sibley、Yongmao Zou、Stephen Thomas
DOI:10.1021/acs.jmedchem.8b01754
日期:2019.2.14
A safer treatment for toxoplasmosis would be achieved by improving the selectivity and potency of dihydrofolate reductase (DHFR) inhibitors, such as pyrimethamine (1), for Toxoplasma gondii DHFR ( TgDHFR) relative to human DHFR ( hDHFR). We previously reported on the identification of meta-biphenyl analog 2, designed by in silico modeling of key differences in the binding pocket between TgDHFR and
通过相对于人DHFR(hDHFR)改善弓形虫DHFR(TgDHFR)的二氢叶酸还原酶(DHFR)抑制剂(如乙胺嘧啶(1))的选择性和效力,可以实现弓形虫病的更安全治疗。我们先前曾报道过对间联苯类似物2的鉴定,该鉴定是通过计算机模拟TgDHFR和hDHFR之间结合口袋中的关键差异而设计的。相对于1,化合物2将TgDHFR的选择性提高了6.6倍,将效力提高了16倍。在这里,我们报道了这种芳基哌嗪系列的优化和构效关系,从而发现了5-(4-(3-(2-甲氧基嘧啶) -5-基)苯基)哌嗪-1-基)嘧啶-2,4-二胺3。化合物3的TgDHFR IC50为1.57±0.11 nM,hDHFR与TgDHFR的选择性比为196,