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Published on: April 23, 2018
用不同的方法对塔罗霍尔酸与胰岛素结合的表征,用于潜在的口服配方
Chang Sun1, Shuanghao Wang1,2, Huihui Li1,3
1State Key Laboratory of Analytical Chemistry for Life Science, National and Local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Changzhou Institute of Innovation and Development, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, People's Republic of China.
陶罗胆酸 (TCA) 与口服胰岛素 (INS) 形成复合体,增强其结构稳定性和尺寸. 这种结合机制有望改善糖尿病管理中的口服胰岛素吸收和生物可用性.
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.
- 材料科学 材料科学 材料科学
背景情况:
- 口服胰岛素 (INS) 在糖尿病管理中比皮下注射具有优势,但其生物可用性较低.
- 陶罗胆酸 (TCA) 已成为口服INS输送的潜在吸收增强剂.
研究的目的:
- 为了研究胰岛素和taurocholic酸之间的分子相互作用.
- 阐明结合机制及其对胰岛素结构性质和大小的影响.
- 评估TCA作为增强口服胰岛素生物可用性的潜力.
主要方法:
- 电喷离子质谱 (ESI-MS) 和MS/MS用于复杂形成和气相稳定性.
- 循环二重化 (CD) 光谱用于构造分析.
- 泰勒分散分析 (TDA) 用于扩散系数和水力动力半径的确定.
- 压力辅助毛细管电泳,对结合常数进行正面分析.
- 分子对接模拟用于结合部位的识别.
主要成果:
- ESI-MS证实了1:1-1:4的胰岛素-TCA复合物的形成.
- 结合TCA增加了胰岛素的结构稳定性,而没有显著的形状变化.
- 在TCA结合 (1:1和1:2复合物) 后,TDA显示胰岛素的水力动力半径增加.
- 结合分析得出结合常数为1.3 × 10^3 L/mol,约有五个结合位点.
- 分子对接表明TCA与胰岛素B链上的外部部位结合.
结论:
- 陶罗胆酸与胰岛素形成稳定的复合物,增强其结构稳定性和尺寸.
- 这些相互作用表明改善口服胰岛素吸收的机制.
- 作为口服胰岛素配方的有效吸收增强剂,TCA具有潜力,改善糖尿病治疗的生物可用性.
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