在追求清洁和绿色介质的同时,近年来离子液体(ILs)的使用出现了前所未有的增长。然而,关于 ILs 对各种生物学途径的影响的研究很少。合成了一系列具有三类不同头基的十二烷基和十四烷基链的ILs,并研究了它们对神经元酶乙酰胆碱酯酶(AChE)和线粒体酶柠檬酸合酶(CS)的活性。为了验证所研究 ILs 的生物相容性,在大肠杆菌上检查了生态毒性行为E149 (EC) 和金黄色葡萄球菌 S244 (SA) 菌株及其对 HEK 和 HeLa 细胞的细胞毒性特性。发现基于吡啶鎓的 ILs 对 AChE 表现出最高的抑制作用;同时,基于吗啉的ILs没有显示出任何显着影响。在 CS 的情况下,与吗啉鎓和咪唑鎓 IL 相比,基于吡啶鎓的系统在体外显示出最大的抑制作用。此外,还发现所有 ILs 都表现出显着的抗氧化活性。结果与从 HeLa 细胞中提取的线粒体的独立估计完整性相当。计算机对接和原子分子动力学模拟
Role of cationic head-group in cytotoxicity of ionic liquids: Probing changes in bilayer architecture using solid-state NMR spectroscopy
作者:Navleen Kaur、Markus Fischer、Sandeep Kumar、Gagandeep Kaur Gahlay、Holger A. Scheidt、Venus Singh Mithu
DOI:10.1016/j.jcis.2020.08.115
日期:2021.1
piperidinium result in enhanced lipid chaindynamics as revealed by order parameter calculations of deuterated lipid chains. Relatively polar head-group of morpholinium cation neither impacts the phospholipid head-group nor chain packing. Our results suggest that there exists a direct correlation between ionic liquid head-group induced structural changes in bilayer and their ability to permeabilize/disrupt
The surface adsorption and micelle formation of N-alkyl-N-methylmorpholinium bromide ([Mor1,n]Br n = 12, 14, 16) in aqueoussolution is investigated in this work. Through surface tension measurements, the effectiveness of surface tension reduction (∏cmc), the maximum surface excess concentration (Γmax) and the minimum area (Amin) occupied per surfactant molecule at the air/water interface at 25 °C
本文研究了N-烷基-N-甲基吗啉溴化物([Mor 1,n ] Br n = 12、14、16)在水溶液中的表面吸附和胶束形成。通过表面张力的测量,表面张力降低的(Π有效性CMC),最大表面过量浓度(Γ最大)和最小面积(A分钟)每个表面活性剂分子所占据在空气/水界面,在25℃下可以推导出。此外,临界胶束浓度(CMC)和各种热力学参数(标准Gibbs能(ΔG米0),焓(Δħ米0),和熵(Δ小号米0))是在不同温度下通过电导率测量得出的。热力学参数的结果表明,胶束化过程是由熵驱动的。
Modulation of drug binding ability and augmented enzymatic activity of lysozyme stabilized in presence of surface-active ionic liquids
Binding of polyphenolic compounds like genistein (GTN) and ellagic acid (EGA) with lysozyme (LYZ) shows strong modulation in presence of surface-activeionicliquids (SAILs), N-dodecylpyridinium bromide (PYD), N-dodecyl-N-methylmorpholinium bromide (MOR), 1-dodecyl-3-methylimidazolium bromide (IMD). Fluorescence of both the native LYZ and LYZ-SAIL complex quenched in presence of the drugs. Both GTN