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Cellulose-Based Matrix Microspheres of Prednisolone Inclusion Complex: Preparation and Characterization

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Abstract

The purpose of the present investigation was to encapsulate pure prednisolone (PRD) and PRD–hydroxypropyl-β-cyclodextrin (HPβCD) complex in cellulose-based matrix microspheres. The system simultaneously exploits complexation technique to enhance the solubility of low-solubility drug (pure PRD) and subsequent modulation of drug release from microspheres (MIC) at a predetermined time. The microspheres of various compositions were prepared by an oil-in-oil emulsion–solvent evaporation method. The effect of complexation and presence of cellulose polymers on entrapment efficiency, particle size, and drug release had been investigated. The solid-state characterization was performed by Fourier transform infrared spectroscopy, thermogravimetry, differential scanning calorimetry, and powder X-ray diffractometry. The morphology of MIC was examined by scanning electron microscopy. The in vitro drug release profiles from these microspheres showed the desired biphasic release behavior. After enhancing the solubility of prednisolone by inclusion into HPβCD, the drug release was easily modified in the microsphere formulation. It was also demonstrated that the CDs in these microspheres were able to modulate several properties such as morphology, drug loading, and release properties. The release kinetics of prednisolone from microspheres followed quasi-Fickian and first-order release mechanisms. In addition to this, the f 2-metric technique was used to check the equivalency of dissolution profiles of the optimized formulation before and after stability studies, and it was found to be similar. A good outcome, matrix microspheres (coded as MIC5) containing PRD–HPβCD complex, showed sustained release of drug (95.81%) over a period of 24 h.

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ACKNOWLEDGMENT

We express gratitude to Medopharm, Karnataka, India, for providing prednisolone as gift sample. We wish to thank Signet Chemical Corporation Pvt. Ltd, (Mumbai, India) and Colorcon Asia Pvt. Ltd (Gao, India) for providing polymers free of cost.

Declaration of interest

The authors are thankful to University Grants Commission (UGC), New Delhi, India, for financial support through grant project no. 34–132\2008 (SR).

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  1. Department of Pharmaceutical Technology, Jadavpur University, Kolkata, 700032, West Bengal, India

    Mohanraj Palanisamy & Jasmina Khanam

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  1. Mohanraj Palanisamy
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Correspondence to Mohanraj Palanisamy.

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Palanisamy, M., Khanam, J. Cellulose-Based Matrix Microspheres of Prednisolone Inclusion Complex: Preparation and Characterization. AAPS PharmSciTech 12, 388–400 (2011). https://doi.org/10.1208/s12249-011-9602-5

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