Development of substituted pyrido[3,2-d]pyrimidines as potent and selective dihydrofolate reductase inhibitors for pneumocystis pneumonia infection
作者:Khushbu Shah、Sherry Queener、Vivian Cody、Jim Pace、Aleem Gangjee
DOI:10.1016/j.bmcl.2019.06.004
日期:2019.8
piritrexim and trimetrexate are potent but non-selective pjDHFR inhibitors. To meet the clinical needs for a potent and selective pjDHFR inhibitor for PCP treatment, fourteen 6-substituted pyrido[3,2-d]pyrimidines were developed. Comparison of the amino acid residues in the active site of pjDHFR and human DHFR (hDHFR) revealed prominent amino acid differences which could be exploited to structurally
由吉氏肺孢子虫(pj)引起的肺孢子虫肺炎(PCP)可能会导致免疫功能低下的患者对健康产生严重后果。甲氧苄氨嘧啶(TMP)与磺胺甲恶唑联用作为一线治疗药物,是一种选择性的但仅中度有效的pj二氢叶酸还原酶(pjDHFR)抑制剂,而非临床上的pjDHFR抑制剂(如匹立tre定和曲美曲塞)有效但非选择性pjDHFR抑制剂。为了满足用于PCP治疗的有效和选择性pjDHFR抑制剂的临床需求,开发了14种6位取代的吡啶并[3,2-d]嘧啶。比较pjDHFR和人DHFR(hDHFR)活性位点中的氨基酸残基,发现了显着的氨基酸差异,可用于结构设计有效和选择性的pjDHFR抑制剂。分子建模和随后的化合物酶测定表明,该化合物是15种最佳化合物,IC50为80 nM,对pjDHFR的抑制作用是hDHFR的28倍。化合物15用作进一步的结构变化的主要类似物,以提供更有效和选择性的pjDHFR抑制剂。