分子动力学 洞察伊布洛芬纳米晶溶解的洞察力 置于古典核化理论的背景下
Peter J Skrdla1,2, Benjamin J Coscia1, Casey Brock1
1Materials Science, Schrödinger, Inc., 1540 Broadway, 24th Floor, New York, New York 10036, United States.
Molecular pharmaceutics
|January 8, 2026
概括
分子动力学模拟表明,小的布洛芬纳米晶体以非经典的方式溶解,而较大的呈现出经典动力学,但保留内部水. 由于水的入侵,结晶性很快就会消失.
科学领域:
- 计算化学和材料科学计算化学和材料科学
- 纳米技术和药物输送
背景情况:
- 了解纳米晶体溶解对于水溶性较差的药物至关重要.
- 经典核化理论 (CNT) 预测了稳定性和溶解行为.
- 布洛芬纳米晶体作为难溶性药物系统的模型.
研究的目的:
- 为了研究在水中溶解布洛芬纳米晶的分子动力学 (MD).
- 为了比较转移稳定和稳定的布洛芬纳米晶体的溶解动力学.
- 阐明粒子大小和水相互作用在纳米晶体溶解中的作用.
主要方法:
- 分子动力学 (MD) 模拟在不同尺寸 (r = 20 Å 和 r = 60 Å) 的布洛芬纳米晶体上进行.
- 在模拟的水槽条件下,在10 ns内评估了溶解动力学.
- 布洛芬和水之间的键被用作溶解程度的度量.
主要成果:
- 转移稳定的 (小) 布洛芬纳米晶体通过非经典机制与振荡溶解配置进行解离.
- 稳定的 (大) 布洛芬纳米晶体表现出经典的诺耶斯-惠特尼 (N-W) 动力学,但形成了内部水口袋.
- 由于水的入,所有颗粒大小都发生了快速的结晶性损失 (在~20 psi范围内).
结论:
- 纳米晶体的溶解行为取决于大小,并可能偏离经典模型.
- 在较大的纳米晶体中形成内部水口袋会影响明显的溶解动力学.
- 这些发现对水溶性较差的药物的生物相关溶解和输送有意义.
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