哌拉西林
氨苄西林
微生物学
头孢他啶
抗生素
头孢西丁
抗菌剂
化学
多重耐药
最小抑制浓度
细菌
壳聚糖
抗菌活性
革兰氏阴性菌
生物
大肠杆菌
生物化学
基因
金黄色葡萄球菌
铜绿假单胞菌
遗传学
作者
Manpreet Kaur,Yael Cohen,Elena Poverenov,Evgeni Eltzov
标识
DOI:10.1016/j.ijbiomac.2022.11.132
摘要
Dissemination of multidrug-resistant (MDR) bacteria with CTX-M-type extended-spectrum β-lactamases (bla CTX-M ) has become the greatest challenge in public health care. This study aimed to investigate the synergistic antibacterial potential of N-alkylaminated chitosan nanoparticles (CNPs) combined with conventional β-lactam antibiotics (BLAs) against multidrug-resistant pathogen with bla CTX-M gene. The results of this study showed that the developed nano-formulation resensitized the studied E. coli MDR strain (E001) to ampicillin (AMP) and piperacillin (PIP) by causing a 1000–10,000-fold decrease in their MIC values (5000–50,000 mg/L to 5 mg/L). The conjugation of CNPs with cefoxitin (FOX) and ceftazidime (CAZ) showed a comparatively lower synergistic inhibitory effect owing to the higher susceptibility (MIC value = 0.5 mg/L–5 mg/L) of E001 to these antibiotics. The results indicate that CNPs could be effectively employed as an additive to augment the antibacterial effect of the BLAs for which MDR strains exhibit higher MIC values. • β-Lactams added with chitosan derivative (CNP) inhibited drug-resistant bacteria. • Combinatorial treatment reduced the MIC of tested β-lactams by 100–10,000 fold. • Ampicillin/piperacillin combined with CNP exhibited a stronger synergetic effect. • Combined therapy is less effective for β-lactams to which bacteria is susceptible.
科研通智能强力驱动
Strongly Powered by AbleSci AI