High antibacterial performance of hydrophobic chitosan-based nanoparticles loaded with Carvacrol

Mariangel Luna, Osvaldo Beltran, David A. Encinas-Basurto, Manuel G. Ballesteros-Monrreal, Antonio Topete, Natalia Hassan, Marco A. López-Mata, Viviana Reyes-Márquez, Miguel A. Valdez, Josué Juarez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Bacterial infections have become one of the top ten public health concerns worldwide. These problems are aggravated with the emergence of multi-drug resistant bacterial strains. Thus, it is necessary to adopt novel technological strategies, such as development of bionanomaterials to prevent the infection, and treat this kind of bacteria. At this regard, the chemical modification of chitosan (Cs), by the covalent attachment of a hydrocarbon chain (octanoic acid), was developed to obtain hydrophobic chitosan (HCs). Then, HCs was used to synthetize nanoparticles using the well-known ionotropic gelation approach, optimizing the parameters, such as the TPP/HCs ratio and pH solution to get stable nanoparticles. Then, carvacrol (CAR) was loaded into NPs (HCs-CAR NPs) using different concentrations of 25%, 50% and 75% (%w/w CAR/HCs). The physicochemical properties for HCs-CAR NPs prepared at 50% of CAR stood out from the rest, showing a spherical morphology, with a size of 200 nm, Z potential of 10.4 mV and encapsulation efficiency of 56.28%. These formulations were chosen to evaluate the antibacterial activity, using Gram-negative (Escherichia coli) and Gram-positive bacterial model (Staphylococcus aureus). The HCs-CAR NPs showed great activity against both bacterial models, being more effective against Gram (+) strain (S. aureus), suggesting the potential application of these NPs as novel biomaterial to treat bacterial infection.

Original languageEnglish
Article number112191
JournalColloids and Surfaces B: Biointerfaces
Volume209
DOIs
StatePublished - Jan 2022

Bibliographical note

Funding Information:
We thank the Consejo Nacional de Ciencia y Tecnología (CONACyT; México) and the University of Sonora , Sonora, México, for financial support through project CB-2014-01 (236185) and USO315005964 , respectively. We also thank to Secretaría de Innovación Ciencia y Tecnología/Consejo Estatal de Ciencia y Tecnología de Jalisco (SICYT/COECYTJAL, México) 8182-19 and to Comisión Nacional de Investigación Científica y Tecnología (CONICYT, Chile) ( REDI170258 ). Mariangel Luna and Osvaldo Beltrán acknowledges CONACyT for its scholarship support on their PhD studies.

Funding Information:
The Consejo Nacional de Ciencia y Tecnología (CONACyT; México) and SICYT/COECYTJAL, Guadalajara, México, for their financial support through project CB-2014-01 (236185) and (8182-19), respectively.

Funding Information:
The Consejo Nacional de Ciencia y Tecnolog?a (CONACyT; M?xico) and SICYT/COECYTJAL, Guadalajara, M?xico, for their financial support through project CB-2014-01 (236185) and (8182-19), respectively.We thank the Consejo Nacional de Ciencia y Tecnolog?a (CONACyT; M?xico) and the University of Sonora, Sonora, M?xico, for financial support through project CB-2014-01 (236185) and USO315005964, respectively. We also thank to Secretar?a de Innovaci?n Ciencia y Tecnolog?a/Consejo Estatal de Ciencia y Tecnolog?a de Jalisco (SICYT/COECYTJAL, M?xico) 8182-19 and to Comisi?n Nacional de Investigaci?n Cient?fica y Tecnolog?a (CONICYT, Chile) (REDI170258). Mariangel Luna and Osvaldo Beltr?n acknowledges CONACyT for its scholarship support on their PhD studies.

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • antibacterial activity
  • carvacrol
  • emulsion
  • hydrophobic chitosan
  • nanoparticles

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