在肌肉内给予阿莫西西林后的药理动力学研究和建模
Morgane Moustaghfir1, Bernadette Espana2, Karine Hauray3
1ANSES-Université de Lyon, Unité Antibiorésistance et Virulence Bactériennes, Lyon, France.
Journal of veterinary pharmacology and therapeutics
|August 20, 2025
概括
乳头炎的小牛体内阿莫西西林 (AMX) 度非常可变,通常低于治疗水平. 经过多次施用的模拟试验也未能达到敏感细菌的断点.
科学领域:
- 兽医药物学
- 药物动力学
- 动物健康
背景情况:
- 乳头炎是一种常见的小牛感染,需要有效的抗生素治疗.
- 阿莫西西林和克拉夫兰酸 (AMC) 是兽医中经常使用的抗菌剂.
- 了解患病小牛的阿莫西林药理学对于优化治疗疗效至关重要.
研究的目的:
- 估计乳头炎的小牛中阿莫西西林 (AMX) 的血药理学参数.
- 评估各个小牛的AMX药理动力学.
- 根据已确定的断点评估AMX的潜在疗效.
主要方法:
- 单次肌肉注射阿莫西林和克拉夫兰酸 (AMC) 给小牛 (n=7).
- 在服用后6小时内采集血样本.
- 使用液态染色法/质谱法 (LC-MS/MS) 量化AMX度.
- 包括蒙特卡洛模拟在内的非分组和群体药动力学分析.
主要成果:
- 观察到药物动力学参数 (Cl,Vd) 的高个体差异.
- 最大血度 (Cmax) 在1. 22至5. 99μg/ ml之间,Tmax在0. 75至2小时之间.
- 血AMX度始终低于易受 E. coli 和 Pasteurella spp. 的 4 mg/ l 断点,即使在重复剂量模拟中也是如此.
结论:
- 单次和模拟的IM多次注射AMX/AMC可能无法在患有腹炎的小牛中达到治疗度.
- 由于药物动力学的高变化,需要进一步研究以优化剂量方案.
- 在这种临床情景下,当前的剂量可能不足以有效治疗敏感的细菌感染.
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