揭开拉罗特雷克提尼布与小牛胸腺DNA的分子相互作用:使用多光谱,热力学和计算技术的综合研究
Manal A Alossaimi1, Taibah Aldakhil1, Heba Elmansi2
1Pharmaceutical Chemistry Department, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.
Biophysical chemistry
|August 15, 2025
概括
拉罗特雷克提尼布强烈地与小牛胸腺DNA (ctDNA) 结合,主要是在小槽中,这表明它具有很高的亲和力和潜在的抗癌机制. 这种相互作用是由疏水力和键驱动的.
科学领域:
- 生物化学和分子生物学
- 药理学和药物发现
背景情况:
- 了解小分子 - 大分子相互作用在各种科学领域至关重要.
- 拉罗特雷克提尼布是一种用于治疗NTRK基因融合的固体瘤的热氨酸激酶抑制剂.
研究的目的:
- 为了研究larotrectinib和小牛胸腺DNA (ctDNA) 之间的相互作用机制.
- 阐明拉托雷克提尼布-DNA相互作用的结合方式,亲和力和驱动力.
主要方法:
- 使用了UV-Vis光谱光度,光谱度和粘度测量.
- 采用了竞争性结合测定,离子强度变化和热力学分析.
- 进行了分子动力学模拟和对接研究.
主要成果:
- 在larotrectinib和ctDNA之间证明强有力的结合,结合常数 (Kb) 为4.4 × 10^5 M-1在298 K.
- 确定ctDNA的小槽是主要的结合部位,特别是在富含AT的区域.
- 热力学分析表明,疏水力和结合是关键的相互作用驱动因素.
结论:
- 拉罗特雷克提尼布对ctDNA的小沟具有很高的亲和力和特异性结合.
- 这些发现提供了对larotrectinib抗癌活性分子相互作用和药理学的基础的见解.
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