循环抗菌C-LR18与原始相比增强了抗菌活性,改善了稳定性和更长的半衰期
Zhihua Pei1,2, Qiaoxi Song1, Jingqi Xu1
1College of Veterinary Medicine, Jilin Agricultural University, Xincheng Street No. 2888, Changchun 130118, China.
Antibiotics (Basel, Switzerland)
|March 28, 2025
概括
与其线性形式LR18相比,一种新的循环,C-LR18,表现出增强的抗菌特性和稳定性. 这种改进的显示了治疗细菌感染的治疗潜力,为现有治疗方法提供了一个有希望的替代方案.
科学领域:
- 生物化学 生物化学
- 药用化学 医学化学
- 药理学 药理学是指药理学的学科.
背景情况:
- LR18是一种具有强大的抗微生物活性的α-螺旋抗微生物 (AMP),但由于易受酶降解和半衰期短,其治疗应用有限.
- 提高LR18的稳定性和延长半衰期对于其发展成为可行的治疗药物来治疗传染病至关重要.
研究的目的:
- 通过在LR18中形成二硫化键来设计和合成一种新型循环,C-LR18.
- 评估C-LR18对*大肠杆菌*感染的生物活性,稳定性,药理动力学概况和治疗疗效.
主要方法:
- 通过使用二硫化物键对LR18进行端到端循环合成C-LR18.
- 对*大肠杆菌*的抗微生物活性 (MIC) 的评估,经过酶 (素,碳氧酸酶,帕帕因) 和血清/肠道溶液的暴露.
- 在血和体内 (大鼠) 中确定半衰期.
- 对小鼠的急性毒性 (LD50) 和感染大肠杆菌的小鼠的治疗效果的评估.
主要成果:
- 与LR18相比,C-LR18保持了较低的细胞毒性和血液溶解活性,同时表现出优越的抗菌功效和稳定性.
- 与LR18相比,C-LR18对酶降解和生理流体的耐药性明显高于LR18.
- 与LR18相比,C-LR18的体内半衰期大幅延长 (3.37倍在血中,4.46倍在老鼠中)
- 在感染大肠杆菌的小鼠中,C-LR18显示出良好的安全性 (LD50 = 37.8 mg/kg) 和显著的治疗疗效.
结论:
- 与LR18相比,循环C-LR18在体外和体内都具有增强的抗菌活性,稳定性和延长的半衰期.
- 在人类和兽医中,C-LR18证明了对细菌疾病的治疗潜力,这需要进一步的临床研究.
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