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Development of mucoadhesive sprayable gellan gum fluid gels

Mahdi, Mohammed H., Conway, Barbara R. and Smith, Alan M. (2015) Development of mucoadhesive sprayable gellan gum fluid gels. International Journal of Pharmaceutics, 488 (1-2). pp. 12-19. ISSN 0378-5173

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The nasal mucosa provides a potentially good route for local and systemic drug delivery. However, the protective feature of the nasal cavity make intranasal delivery challenging. The application of mucoadhesive polymers in nasal drug delivery systems enhances the retention of the dosage form in the nasal cavity. Several groups have investigated using low acyl gellan as a drug delivery vehicle but only limited research however, has been performed on high acyl gellan for this purpose, despite its properties being more conducive to mucoadhesion. High acyl gellan produces highly elastic gels below 60 °C which make it difficult to spray using a mechanical spray device. Therefore, in this study we have tried to address this problem by making fluid gels by introducing a shear force during gelation of the gellan polymer. These fluid gel systems contain gelled micro-particles suspended in a solution of un-gelled polymer. These systems can therefore behave as pourable viscoelastic fluids. In this study we have investigated the rheological behavior and mucoadhesion of fluid gels of two different types of gellan (high and low acyl) and fluid gels prepared from blends of high and low acyl gellan at a 50:50 ratio. The results demonstrated that by preparing fluid gels of high acyl gellan, the rheological properties were sufficient to spray through a standard nasal spray device. Moreover fluid gels also significantly enhance both high acyl and low acyl gellan mucoadhesion properties.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
R Medicine > RS Pharmacy and materia medica
Schools: School of Applied Sciences
School of Human and Health Sciences > Institute for Skin Integrity and Infection Prevention
Related URLs:
Depositing User: Alan Smith
Date Deposited: 29 Apr 2015 08:31
Last Modified: 30 Mar 2016 00:07


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