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Volume: 9, Issue: 5, May, 2019
Injectable in situ gel of methotrexate for rheumatoid arthritis: Development, in vitro and in vivo evaluationAuthor Affiliations
The aim of the research study was to formulate a novel, biodegradable, injectable in situ gel system of Methotrexate (MTX) in the management of rheumatoid arthritis (RA). Varying concentration of Pluronic F-127 (20% and 22% w/v) and xanthan gum (0.2%–0.6% w/v) were used in the development of the formulations. In vitro and in vivo studies were carried out for the prepared MTX in situ gels. The results demonstrated that MTX was uniformly distributed and the in situ gels were sterile and syringeable. The gels showed thermosensitivity and thermoresponsivity dependent on concentration and composition of co-polymers. The optimized formulation exhibited drug release of 95.29% at 132 hours by non-fickian diffusion mechanism. Polymer concentration and composition influenced the release of the drug from the prepared in situ gels. In vivo studies carried on Freund’s adjuvant-induced monoarthritis in male Wistar rats; results showed a significant reduction in the inflammation at the test site. The gels were biocompatible since no inflammation was observed in the synovial membrane. MTX in situ gels could be proposed as an effective delivery system management of RA in near future.
Copyright: The Author(s). This is an open access article distributed under the Creative Commons Attribution Non-Commercial License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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