通过多光谱方法和分子对接模拟的组合,阐明了塞夫多克西姆-BSA相互作用的机制
Reem N El Gammal1, Heba Elmansi2, Ali A El-Emam1
1Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, 35516, Mansoura, Egypt.
Scientific reports
|March 1, 2026
概括
这项研究揭示了 cefpodoxime (CFP) 如何与牛血清白蛋白 (BSA) 结合,主要是通过IIA.亚域的疏水相互作用. 了解这种药物蛋白相互作用是预测CFP的关键.
科学领域:
- 生物化学 生化学
- 药理学 药理学是指药理学的学科.
- 分子生物物理学 分子生物物理学
背景情况:
- 塞夫多克西姆 (Cefpodoxime,简称CFP) 是一种广泛使用的抗生素.
- 牛血清白蛋白 (BSA) 是用于药物结合研究的常见模型蛋白.
- 了解药物蛋白相互作用对于药理动力学至关重要.
研究的目的:
- 为了阐明 cefpodoxime (CFP) 和牛血清白蛋白 (BSA) 之间的分子相互作用机制.
- 为了确定CFP在BSA上的结合亲和力,力量和特定结合位点.
- 为了解CFP的药理动力学概况提供见解.
主要方法:
- 紫外线-Vis吸收光谱检测复杂的形成.
- 光火研究以确定结合机制和亲和力.
- 使用范特霍夫方程进行热力学分析.
- 竞争性站点标志物位移测试.
- 计算分子对接模拟.
主要成果:
- 在CFP和BSA之间形成地面状态复杂的证据.
- 确定了一种静态火机制,表明中等的结合亲和力 (Kb = 3.99 × 104 L·mol−1 在 298 K).
- 结合过程是自发的和内热的,主要由疏水性相互作用 (正 ΔS°) 驱动.
- CFP与BSA的IIA子域 (Site I) 结合,通过多种方法确认.
结论:
- CFP与BSA的结合具有中度亲和力,并由IIA亚域的疏水力驱动.
- 这些发现提高了对CFP的药理动力学行为的理解,包括分布和消除.
- 这些知识支持CFP的安全临床应用,并有助于减轻不良影响.
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