difficult to treat because of its resistance to commonly used antibiotic, and poses a significant threat to public health. To develop new anti-bacterial agents to combat MRSA-induced infections, we synthesized novel squaric amide derivatives and evaluated their anti-bacterial activity by determining the minimum inhibitory concentration (MIC). Additionally, inhibitory activity of squaric amide 2 (SA2) was
耐
甲氧西林金黄色葡萄球菌(MRSA) 引起的感染因其对常用抗生素的耐药性而难以治疗,并对公众健康构成重大威胁。为了开发新的抗菌剂来对抗 MRSA 引起的感染,我们合成了新的
方酸酰胺衍
生物,并通过确定最小抑菌浓度 (MIC) 来评估它们的抗菌活性。此外,使用生长曲线测定、时间杀灭测定和 MRSA 诱导的皮肤感染动物模型测量方酰胺 2 (
SA2) 的抑制活性。利用扫描电镜和透射电镜观察
SA2对MRSA形貌的影响。转录组分析和实时荧光定量PCR被用来检测
SA2可能的抗菌机制。结果表明,
SA2 对多种 MRSA 菌株具有杀菌活性,MIC 为 4–8 µg/mL。它还以剂量依赖性方式抑制MRSA菌株的细菌生长曲线,并在4-8小时内降低4×MIC的菌落形成单位。
SA2处理后7天内,小鼠MRSA感染组织的感染病灶大小和细菌数量显着减少。此外,
SA2 破坏了细菌膜和丙氨酸脱氢酶依赖性
NAD SA2处理后