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Application of enzyme-mediated cellulose nanofibers from lemongrass waste for the controlled release of anticancer drugs

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Abstract

In the present study, an application of cellulose nanofibers has been established for the controlled release of an anticancer drug, i.e., camptothecin. The camptothecin is known for its antitumor activity. However, it has certain limitations like instability, low solubility in aqueous solution, and biological fluids. Firstly, the camptothecin was encapsulated into the cellulose nanofiber complex by adjusting the composition ratio of cellulose nanofibers—camptothecin, i.e., 10:3, 10:5, and 10:7. In the 10:3 composition ratio of cellulose nanofibers, camptothecin showed the highest encapsulation efficiency, i.e., 65.28%. The binding of camptothecin with cellulose nanofibers was confirmed by FT-IR analysis. Also, the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm studies demonstrate physical adsorption of camptothecin onto the homogeneous as well as the heterogeneous surface of cellulose nanofibers. Further, the controlled and extended-release profile was observed at different physiological pH, and different kinetics models were used to understand the drug release mechanism. The highest correlation in all pH conditions was obtained in Korsmeyer-Peppas with R2 value = 0.93 (pH 1.2), 0.89 (pH 6.8), and 0.97 (pH 7.4), whereas in Higuchi model, R2 value = 0.89 (pH 1.2), 0.91 (pH 6.8), and 0.98 (pH 7.4), suggesting the release of a drug via a diffusion mechanism. Hence, the results established that enzyme-mediated cellulose nanofibers may also be an optimal carrier for the controlled drug release formulation without any chemical excipients.

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Acknowledgments

The authors are thankful to the Director, CSIR-CIMAP, Lucknow, for the necessary facilities required to complete the experimental work. The authors acknowledge Dr. P.V. Ajayakumar, Chief Scientist, and Dr. Pooja Singh, Technical Assistant CSIR-CIMAP for SEM analysis and Dr. Aparna Chaudhary for the drug release data analysis support. The authors also acknowledge Prof. B.C. Yadav (In-charge), USIC facility, Babasaheb Bhimrao Ambedkar University, for FT-IR analysis.

Funding

This work was financially supported by CSIR-Aroma Mission Project (HCP 007). PK acknowledges University Grants Commission, New Delhi, for financial assistance.

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Correspondence to Abha Meena.

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The authors declare that they have no conflicts of interest.

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Responsible Editor: Tito Roberto Cadaval Jr

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Kumari, P., Meena, A. Application of enzyme-mediated cellulose nanofibers from lemongrass waste for the controlled release of anticancer drugs. Environ Sci Pollut Res 28, 46343–46355 (2021). https://doi.org/10.1007/s11356-020-08358-3

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  • DOI: https://doi.org/10.1007/s11356-020-08358-3

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