采用液质联用技术优化并考察卡维地洛固体自微乳制剂的相对生物利用度。

Improvement of oral bioavailability of carvedilol by liquisolid compact: optimization and pharmacokinetic study.

机构信息

Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, 382481, India.

Piramal Enterprises Limited, Pharmaceutical Special Economic Zone, Sarkhej-Bawla NH #8A, Ahmedabad, Gujarat, 382213, India.

出版信息

Drug Deliv Transl Res. 2020 Aug;10(4):975-985. doi: 10.1007/s13346-020-00734-3.

Abstract

Low aqueous solubility is one of the major reasons for the poor clinical efficacy of carvedilol in oral therapy. The aim of the present investigation was to evaluate the potential of liquisolid compact technique to enhance the dissolution rates of carvedilol and thereby the bioavailability. Liquisolid compacts were prepared using polyethylene glycol 400, Neusilin US2 and Aerosil 200. Experimental design and optimization was carried out by applying a 3 factorial design (batches D1-D9) to examine the effects of independent variables (amount of load factor and the excipient ratio) on dependent variables (angle of repose and % drug release). Differential scanning calorimetry and X-ray diffraction studies suggested transformation of carvedilol to amorphous in D6, a key factor responsible for dissolution rate improvement. This effect was evidenced in the dissolution data of D6 (>95% drug dissolved in 30 min) where the drug release kinetics followed Weibull model. It was observed that the amount of load factor influenced angle of repose and excipient ratio affected drug dissolution of liquisolid compacts. Pharmacokinetic profile of D6 was prominent, demonstrating greater carvedilol absorption than the control in rats. The observed increase in systemic bioavailability of carvedilol AUC (p < 0.005) by liquisolid compact is likely due to the improvement in drug solubility. The data observed in the current study demonstrated that the liquisolid compact technique could be a promising strategy to enhance the bioavailability of carvedilol and could be used in oral therapy. Graphical abstract.

摘要

水溶解度低是卡维地洛口服治疗效果不佳的主要原因之一。本研究旨在评估液固技术提高卡维地洛溶出速率,从而提高生物利用度的潜力。液固压缩物采用聚乙二醇 400、Neusilin US2 和 Aerosil 200 制备。通过应用 3 因素设计(批次 D1-D9)来考察独立变量(负荷因子和赋形剂比例)对依赖变量(休止角和%药物释放)的影响,对液固压缩物进行了实验设计和优化。差示扫描量热法和 X 射线衍射研究表明,D6 中卡维地洛转化为无定形,这是提高溶出速率的关键因素。D6 的溶出数据(30 分钟内超过 95%的药物溶解)证实了这一效果,药物释放动力学符合 Weibull 模型。观察到负荷因子的量影响休止角,赋形剂比例影响液固压缩物的药物溶出。D6 的药代动力学特征明显,在大鼠中比对照药物显示出更大的卡维地洛吸收。通过液固压缩物观察到的卡维地洛 AUC 系统生物利用度增加(p<0.005)可能是由于药物溶解度的提高。本研究观察到的数据表明,液固压缩技术可能是提高卡维地洛生物利用度的一种有前途的策略,并可用于口服治疗。

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