Molecular modeling and antimycobacterial studies of Mannich bases: 5-hydroxy-2-methyl-4H-pyran-4-ones
作者:BARKIN BERK、DEMET US、SİNEM ÖKTEM、ZÜHTÜ TANIL KOCAGÖZ、BERRAK ÇAĞLAYAN、IŞIL AKSAN KURNAZ、DİLEK DEMİR EROL
DOI:10.3906/kim-1006-689
日期:——
The World Health Organization lists tuberculosis among the top 3 leading causes of death from a single infectious agent, and reported cases of multidrug-resistant tuberculosis (MDR-TB) are on the rise. In an attempt to improve MDR-TB drug-directed therapy, we synthesized 11 4-substituted piperazine derivatives of 3-hydroxy-6-methyl-4H-pyran-4-one pharmacophore by reacting 5-hydroxy-2-methyl-4H-pyran-4-one with suitable piperazine derivatives under Mannich reaction conditions. Inhibitory effects of the 11 compounds on Escherichia coli DNA gyrase were evaluated via DNA gyrase supercoiling assay. The minimum inhibitory concentrations (MIC) of the 11 compounds and 41 compounds from our previous studies against Mycobacterium tuberculosis H37RV were assessed, in vitro, by a broth dilution method. To determine the interaction pattern between active site amino acids and all 52 compounds, homology modeling for the construction of M. tuberculosis DNA gyrase B subunit was performed, followed by a docking study. The data presented here could prove useful in future studies on interaction field analysis and high throughput virtual screening of the derivatives of the 3-hydroxy-6-methyl-4H-pyran-4-one pharmacophore toward the development of more clinically applicable compounds.
世界卫生组织将结核病列为单一传染源导致死亡的三大主要原因之一,而报告的耐多药结核病(MDR-TB)病例也呈上升趋势。 为了改进 MDR-TB 药物导向疗法,我们在曼尼希反应条件下,通过 5-羟基-2-甲基-4H-吡喃-4-酮与合适的哌嗪衍生物反应,合成了 11 种 3-羟基-6-甲基-4H-吡喃-4-酮药代体的 4-取代哌嗪衍生物。 通过 DNA 回旋酶超螺旋试验评估了 11 种化合物对大肠杆菌 DNA 回旋酶的抑制作用。 体外肉汤稀释法评估了这 11 种化合物和我们之前研究中的 41 种化合物对结核分枝杆菌 H37RV 的最低抑制浓度(MIC)。 为了确定活性位点氨基酸与所有 52 种化合物之间的相互作用模式,我们对结核分枝杆菌 DNA 回旋酶 B 亚基的构建进行了同源建模,然后进行了对接研究。 本文所提供的数据将有助于今后对 3-羟基-6-甲基-4H-吡喃-4-酮药效团衍生物的相互作用场分析和高通量虚拟筛选研究,从而开发出更多适用于临床的化合物。