作者:Martin Krátký、Jarmila Vinšová、Eva Novotná、Jana Mandíková、František Trejtnar、Jiřina Stolaříková
DOI:10.3390/molecules18043674
日期:——
The development of novel antimicrobial agents represents a timely research topic. Eighteen salicylanilide 4-(trifluoromethyl)benzoates were evaluated against Mycobacterium tuberculosis, M. avium and M. kansasii, eight bacterial strains including methicillin-resistant Staphylococcus aureus (MRSA) and for the inhibition of mycobacterial isocitrate lyase. Some compounds were further screened against drug-resistant M. tuberculosis and for their cytotoxicity. Minimum inhibitory concentrations (MICs) for all mycobacterial strains were within 0.5–32 μmol/L, with 4-chloro-2-[4-(trifluoromethyl)phenylcarbamoyl]phenyl 4-(trifluoromethyl)benzoate superiority. Gram-positive bacteria including MRSA were inhibited with MICs ³ 0.49 μmol/L, while Gram-negative ones were much less susceptible. Salicylanilide 4-(trifluoromethyl)benzoates showed significant antibacterial properties, for many strains being comparable to standard drugs (isoniazid, benzylpenicillin) with no cross-resistance. All esters showed mild inhibition of mycobacterial isocitrate lyase and four compounds were comparable to 3-nitropropionic acid without a direct correlation between in vitro MICs and enzyme inhibition.
新型抗菌剂的开发是一个及时的科研课题。评估了18种水杨酰苯胺4-(三氟甲基)苯甲酸酯对结核分枝杆菌、鸟分枝杆菌和堪萨斯分枝杆菌的抗菌活性,包括8种细菌株如耐甲氧西林金黄色葡萄球菌(MRSA)以及对分枝杆菌异柠檬酸裂解酶的抑制作用。对一些化合物进一步筛选其对耐药性结核分枝杆菌的抗菌活性和细胞毒性。所有分枝杆菌株的最小抑菌浓度(MICs)在0.5–32 μmol/L之间,其中4-氯-2-[4-(三氟甲基)苯基氨基甲酰]苯基 4-(三氟甲基)苯甲酸酯表现最优。包括MRSA在内的革兰氏阳性菌的MICs ≥ 0.49 μmol/L,而革兰氏阴性菌的敏感性较低。水杨酰苯胺4-(三氟甲基)苯甲酸酯显示出显著的抗菌特性,对于许多菌株与标准药物(异烟肼、青霉素)相当,没有交叉耐药性。所有酯类对分枝杆菌异柠檬酸裂解酶显示出轻微抑制作用,其中四种化合物与3-硝基丙酸相当,体外MICs与酶抑制之间没有直接相关性。