在大鼠中评估生物活性植物化学物Withanone的临床前药理动力学,绝对生物可用性和剂量比例
Sandeep K Singh1, Mamunur Rashid2, Swati Chaturvedi3
1Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA.
维他 (WN) 在老鼠中表现出较差的口服吸收和较低的生物可用性,表明可和的药理动力学. 这些发现对于优化WN剂量及其潜在的治疗开发至关重要.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药理动力学 药理动力学
- 自然产品 化学 化学
背景情况:
- 维他 (WN) 是来自Withania somnifera的植物化学物质,它对神经保护和抗癌作用有很大的希望.
- 缺乏纯WN的详细药理动力学 (PK) 数据,这阻碍了其治疗应用.
- 了解WN的PK概况对于剂量优化和临床转换至关重要.
研究的目的:
- 在老鼠中描述纯Withanone (WN) 的药理动力学特性.
- 为了确定WN的剂量比例性和绝对口服生物可用性.
- 建立一个可靠的LC-MS/MS方法来量化WN在生物矩阵.
主要方法:
- 开发并验证了一种敏感的LC-MS/MS试验,用于WN定量 (0.5-500 ng/mL线性,r2 ≥0.99).
- 用于口服WN (10,20,40毫克/公斤) 和静脉注射 (5毫克/公斤) 给斯普拉格-道利大鼠.
- 分析了血样本以确定PK参数,包括Cmax,AUC和生物可用性.
主要成果:
- 在老鼠中,WN显示系统暴露较差,口服生物利用率较低 (<15%).
- 药理学研究显示了可和的生物可用性和不成比例的全身暴露WN跨测试的口服剂量.
- LC-MS/MS方法对于WN分析是准确,可靠和高效的.
结论:
- 在老鼠中,WN表现出不良的口服药物动力学特征,包括吸收不良和和生物可用性.
- 这些发现需要仔细考虑WN的临床开发和剂量方案设计.
- 需要进一步的研究来提高WN的口服生物可用性和治疗疗效.
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