Characterization and scanning electron microscopic investigation of crosslinked freeze dried gelatin matrices for study of drug diffusivity and release kinetics

Goutam Thakur, Analava Mitra, Amit Basak, Debdoot Sheet

Research output: Contribution to journalArticle

21 Citations (Scopus)

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 (5°C, 15°C and 25°C) prior to freeze-drying (-80°C). The freeze dried matrices thus obtained at the said temperatures are characterized for crosslinking density, compression strength, swelling behaviors. The matrix crosslinked at 25°C 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 to 0.69 (p<0.05) (0.45<n<0.89) indicated non-Fickian release kinetics.

Original languageEnglish
Pages (from-to)311-320
Number of pages10
JournalMicron
Volume43
Issue number2-3
DOIs
Publication statusPublished - 01-02-2012

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Gelatin
Electrons
Pharmaceutical Preparations
Compressive Strength
Ferrets
Temperature
Freeze Drying
Indomethacin
Electron Scanning Microscopy
Anti-Inflammatory Agents
Drug Liberation
Water
Therapeutics

All Science Journal Classification (ASJC) codes

  • Cell Biology
  • Structural Biology

Cite this

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Characterization and scanning electron microscopic investigation of crosslinked freeze dried gelatin matrices for study of drug diffusivity and release kinetics. / Thakur, Goutam; Mitra, Analava; Basak, Amit; Sheet, Debdoot.

In: Micron, Vol. 43, No. 2-3, 01.02.2012, p. 311-320.

Research output: Contribution to journalArticle

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