Characterization and Scanning Electron microscopic Investigation of Crosslinked freeze dried gelatin matrices for study of Drug diffusivity and Release kinetics

Thakur, Goutam and Mitra, Analava and Basak, Amit and Sheet, Debdoot (2010) Characterization and Scanning Electron microscopic Investigation of Crosslinked freeze dried gelatin matrices for study of Drug diffusivity and Release kinetics. Micron. ISSN 0968-4328

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Abstract

Drug delivery is a promising technique to enhance the therapeutic efficacy of the drug. However, properties of carrier materials require intense improvement for effective transport of drug molecules. In the current study, attempts have been made to develop freeze dried gelatin matrices cross linked with genipin at various temperatures (5ºC, 15ºC and 25ºC) prior to freeze-drying (-80ºC). The freeze dried matrices thus obtained at the said temperatures are characterized for crosslinking density, compression strength, swelling behaviors. The matrix crosslinked at 25ºC showed highest Flory Rehner crosslinking density (467±46) (p<0.05), highest compressive strength (12.36±0.12) (p<0.05) and lowest equilibrium water content. In this context, scanning electron microscopy (SEM) was performed to study the surface morphology (size and shape of pores) of the crosslinked matrices. These images were further processed for quantitative analysis of morphological features viz., areas, radius, ferret diameter, length of major and minor axis and eccentricity using MATLAB toolboxes. These quantitative analyses correlate transport and the release kinetics of model anti-inflammatory drug (indomethacin) from crosslinked matrices in vitro to tune as a controllable delivery system. The diffusional exponent (n) for all constructs ranging from 0.61-0.69 (p<0.05) (0.45<n<0.89) indicated non-Fickian release kinetics.

Item Type: Article
Uncontrolled Keywords: Freeze dried matrix, gelatin, cross linking, image analysis, drug release
Subjects: Engineering > MIT Manipal > Biomedical
Depositing User: MIT Library
Date Deposited: 25 Nov 2011 09:22
Last Modified: 25 Nov 2011 09:22
URI: http://eprints.manipal.edu/id/eprint/1650

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