In Vitro Evaluation of Mucoadhesive Vaginal Tablets of Antifungal Drugs Prepared with Thiolated Polymer and Development of a New Dissolution Technique for Vaginal Formulations

被引:36
作者
Baloglu, Esra [1 ]
Senyigit, Zeynep Ay [1 ]
Karavana, Sinem Yaprak [1 ]
Vetter, Anja [3 ]
Metin, Dilek Yesim [2 ]
Polat, Suleyha Hilmioglu [2 ]
Guneri, Tamer [1 ]
Bernkop-Schnurch, Andreas [3 ]
机构
[1] Ege Univ, Fac Pharm, Dept Pharmaceut Technol, TR-35100 Bornova, Turkey
[2] Ege Univ, Fac Med, Dept Microbiol & Clin Microbiol, TR-35100 Bornova, Turkey
[3] Univ Innsbruck, Inst Pharm, Dept Pharmaceut Technol, A-6020 Innsbruck, Austria
关键词
thiomer; mucoadhesion; tablet; candidiosis; econazole nitrate; miconazole nitrate; POLY(ACRYLIC ACID); DICLOFENAC SODIUM; DELIVERY-SYSTEM; RELEASE; MECHANISMS; DESIGN;
D O I
10.1248/cpb.59.952
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
The main objective of this work was to develop antifungal matrix tablet for vaginal applications using mucoadhesive thiolated polymer. Econazole nitrate (EN) and miconazole nitrate (MN) were used as antifungal drugs to prepare the vaginal tablet formulations. Thiolated poly(acrylic acid) cysteine (PAA-Cys) conjugate was synthesized by the covalent attachment of L-cysteine to PAA with the formation of amide bonds between the primary amino group of L-cysteine and the carboxylic acid group of the polymer. Vaginal mucoadhesive matrix tablets were prepared by direct compression technique. The investigation focused on the influence of modified polymer on water uptake behavior, mucoadhesive property and release rate of drug. Thiolated polymer increased the water uptake ratio and mucoadhesive property of the formulations. A new simple dissolution technique was developed to simulate the vaginal environment for the evaluation of release behavior of vaginal tablets. In this technique, daily production amount and rate of the vaginal fluid was used without any rotational movement. The drug release was found to be slower from PAA-Cys compared to that from PAA formulations. The similarity study results confirmed that the difference in particle size of EN and MN did not affect their release profile. The release process was described by plotting the fraction released drug versus time and n fitting data to the simple exponential model: M-t/M-infinity = kt(n). The release kinetics were determined as Super Case II for all the formulations prepared with PAA or PAA-Cys. According to these results the mucoadhesive vaginal tablet formulations prepared with PAA-Cys represent good example for delivery systems which prolong the residence time of drugs at the vaginal mucosal surface.
引用
收藏
页码:952 / 958
页数:7
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