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Influence of molecular interactions on structure, controlled release and cytotoxicity of curcumin encapsulated chitosan - Silica nanostructured microspheres.

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Title: Influence of molecular interactions on structure, controlled release and cytotoxicity of curcumin encapsulated chitosan - Silica nanostructured microspheres.
Authors: Bhatt, Himal1,2 (AUTHOR) hbhatt@barc.gov.in, Bahadur, J.1,2,3 (AUTHOR), Checker, R.1,2,4 (AUTHOR), Ajgaonkar, P.1 (AUTHOR), Vishwakarma, S.R.1 (AUTHOR), Sen, Debasis2,3 (AUTHOR)
Source: Colloids & Surfaces B: Biointerfaces. Dec2021, Vol. 208, pN.PAG-N.PAG. 1p.
Subjects: Curcumin, Molecular structure, Molecular interactions, Microspheres, Pharmacokinetics, Chitosan
Abstract: [Display omitted] • Curcumin encapsulated chitosan-silica nanostructured microspheres were prepared. • DMSO/Tween 20 were used as modifiers to Polymer matrix to tune drug release. • FTIR showed tuning of conformations, interactions and H-bonding in the complex. • 1st order drug release kinetics (24 h) and good anti-cancer efficacy was shown. • SAXS showed release rate constant follows the ordering of packing fraction of NPs. Curcumin possesses numerous medicinal benefits including anti-cancer and anti-viral properties. However, its wide scale use as a drug is often hindered owing to the dearth of suitable drug-delivery systems which can solubilise it for long-term sustained-release and safeguard its beneficial properties. In this work, a fast, one-step method, employing evaporation induced assembly of colloids, has been employed for the synthesis of curcumin encapsulated organic-inorganic hybrid micron-sized spheres. Detailed physical properties of the microspheres, with scaffolds of silica nanoparticles (∼8.5 nm) cross linked by chitosan, are studied to trace the underlying mechanism of structural assembly in such systems, by tuning the polymer matrix with solubilizing agents, DMSO and Tween 20. A systematic modification in the hydrogen bonding network, conformations and interactions between macromolecules is revealed upon tuning the organic matrix. This in turn is found to control the assembly vis-à-vis the granular morphology, drug entrapment and packing fraction of nanoparticles in the microspheres, which have direct influence on the biological properties. Consequently, the microspheres are found to follow a first order drug release kinetics with a tunable rate constant which follows the ordering of packing fraction of silica nanoparticles in the micro-granules. A sustained curcumin release for a period extending up to 24 h has been achieved. Further studies using human lung and cervical cancer cell lines assert good anti-cancer properties of these nanostructured microspheres in cancer cells, while showing no toxicity towards normal cells. Thus, such hybrid organic-inorganic formulations achieved using multi-component colloidal assembly approach, with enhanced stability against degradation, are promising candidates for future clinical applications of water-insoluble drugs. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:[Display omitted] • Curcumin encapsulated chitosan-silica nanostructured microspheres were prepared. • DMSO/Tween 20 were used as modifiers to Polymer matrix to tune drug release. • FTIR showed tuning of conformations, interactions and H-bonding in the complex. • 1st order drug release kinetics (24 h) and good anti-cancer efficacy was shown. • SAXS showed release rate constant follows the ordering of packing fraction of NPs. Curcumin possesses numerous medicinal benefits including anti-cancer and anti-viral properties. However, its wide scale use as a drug is often hindered owing to the dearth of suitable drug-delivery systems which can solubilise it for long-term sustained-release and safeguard its beneficial properties. In this work, a fast, one-step method, employing evaporation induced assembly of colloids, has been employed for the synthesis of curcumin encapsulated organic-inorganic hybrid micron-sized spheres. Detailed physical properties of the microspheres, with scaffolds of silica nanoparticles (∼8.5 nm) cross linked by chitosan, are studied to trace the underlying mechanism of structural assembly in such systems, by tuning the polymer matrix with solubilizing agents, DMSO and Tween 20. A systematic modification in the hydrogen bonding network, conformations and interactions between macromolecules is revealed upon tuning the organic matrix. This in turn is found to control the assembly vis-à-vis the granular morphology, drug entrapment and packing fraction of nanoparticles in the microspheres, which have direct influence on the biological properties. Consequently, the microspheres are found to follow a first order drug release kinetics with a tunable rate constant which follows the ordering of packing fraction of silica nanoparticles in the micro-granules. A sustained curcumin release for a period extending up to 24 h has been achieved. Further studies using human lung and cervical cancer cell lines assert good anti-cancer properties of these nanostructured microspheres in cancer cells, while showing no toxicity towards normal cells. Thus, such hybrid organic-inorganic formulations achieved using multi-component colloidal assembly approach, with enhanced stability against degradation, are promising candidates for future clinical applications of water-insoluble drugs. [ABSTRACT FROM AUTHOR]
ISSN:09277765
DOI:10.1016/j.colsurfb.2021.112067