Chitosan hydrogel loaded with Chamaecyparis pisifera essential oil exhibits antifungal activity against clinically relevant Candida spp.

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ID: 333630
2026
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Abstract
Abstract Aims New therapeutic approaches are needed to control infections caused by Candida, and encapsulating bioactive substances has attracted increasing interest as a promising strategy. In this study, a chitosan-based hydrogel containing Chamaecyparis pisifera essential oil (HCP) was formulated and evaluated for antifungal activity, physicochemical characterisation and toxicity assessment. Methods and Results The chemical composition of the essential oil was analysed by gas chromatography coupled to a flame ionization detector (GC-FID) and mass spectrometry (GC-MS), identifying α-pinene (30.21%) and bornyl acetate (24.42%) as the major constituents. The formulation showed particle sizes ranging from 252 to 839 nm and remained physically stable for up to 150 days. The antifungal activity of HCP was evaluated against clinical isolates of Candida spp., with minimum inhibitory concentration (MIC) values ranging from 150 to 0.01 μg mL⁻¹ for Nakaseomyces glabratus (formerly C. glabrata) and Meyerozyma guilliermondii (formerly C. guilliermondii), respectively. Thermal analyses demonstrated favorable thermal properties of the hydrogel, and electron microscopy confirmed a porous structure and incorporation of the essential oil into the chitosan matrix. Rheological analysis indicated non-Newtonian pseudoplastic behaviour. Furthermore, the hydrogel showed an acceptable safety profile, being non-irritant and presenting no toxicity towards blood cells or Galleria mellonella. Conclusions Taken together, these findings demonstrate that the HCP hydrogel exhibits antifungal activity against clinically relevant Candida spp. and represents a potential antifungal biomaterial for future therapeutic applications.
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Authors Ana Cláudia Alcântara Lemos, Wellington Santos da Silva, Luana Farias de Aguiar, Jaciana dos Santos Aguiar, Norma Buarque de Gusmão, Petrus d'Amorim Santa Cruz Oliveira, Cláudio Augusto Gomes da Câmara, Marcílio Martins de Moraes, Guilherme M. Gelfuso, Breno N. Matos, José Geraldo A. Pacheco, Juan Felipe González Alba, Georon Ferreira de Sousa, Cristiane Moutinho Lagos de Melo, Isabella Macário Ferro Cavalcanti, Luís André de Almeida Campos, Raudiney Frankilin Vasconcelos Mendes, Rafael Matos Ximenes, Matheus Fernandes Pedrosa, Bruno Amorim-Carmo, Andrelina Maria Pinheiro Santos, Gláucia Manoella de Souza Lima
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Journal Journal of applied microbiology
Year 2026
DOI
10.1093/jambio/lxag264
URL
https://doi.org/10.1093/jambio/lxag264
Keywords Keywords not found

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