Encapsulation of polyketide colorants in chitosan and maltodextrin microparticles

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Galvan, Karina Lizzeth Pedraza ; Verissismo, Nathalia Vieira Porhirio ; Santana, Jamille Santos ; Lemos, Paulo Vitor Franca ; de Souza, Carolina Oliveira ; Cardoso, Lucas Guimaraes ; Assis, Denilson de Jesus ; Marcelino, Henrique Rodrigues ; de Oliveira, Thamila Thalline Batista ; Biasoto, Aline Telles Camara ; Tavares Junior, Alberto Gomes ; Chorilli, Marlus ; Santos-Ebinuma, Valeria de Carvalho ; da Silva, Jania Betania Alves

• Document type: Journal article
• Source: International Journal of Biological Macromolecules; v. 269, p. 13-pg., 2024-05-10.

Abstract

This study aimed to encapsulate Talaromyces amestolkiae colorants in maltodextrin and chitosan microparticles using the spraydrying technique and to evaluate the biopolymers' capacities to protect the fungal colorant against temperature (65 degrees C) and extreme pH (2.0 and 13.0). The compact microparticles exhibited smooth or indented surfaces with internal diameters ranging between 2.58-4.69 mu m and zeta similar to -26 mV. The encapsulation efficiencies were 86 % and 56 % for chitosan and maltodextrin microparticles, respectively. The shifted endothermic peaks of the free colorants indicated their physical stabilization into microparticles. The encapsulated colorants retained most of their absorbance (compared to the 0 h) even after 25 days at 65 degrees C. Contrary, the free colorant presented almost no absorbance after 1 day under the same conditions. Colorants in chitosan and maltodextrin matrices also partially maintained their colorimetric and fluorometric properties at acidic pH. However, only maltodextrin improved the resistance of the red colorant to alkaline environments. For the first time, the potential of polysaccharide-based microparticles to preserve polyketide colorants was demonstrated using 3D fluorescence. Therefore, this study demonstrated an alternative in developing functional products with natural color additives. (AU)

• FAPESP's process: 21/06686-8 - Biotechnological process for the development of natural colorants from microbial sources for industrial application: phase II
• Grantee: Valéria de Carvalho Santos Ebinuma
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Young Investigators Grants - Phase 2
• FAPESP's process: 23/01368-3 - Stabilization and encapsulation of natural colorants and application in the development of packaging and cosmetics
• Grantee: Valéria de Carvalho Santos Ebinuma
• Support Opportunities: Regular Research Grants
• FAPESP's process: 23/10479-3 - Stabilization and encapsulation of natural colorants and application in the development of packaging and cosmetics
• Grantee: Nathalia Vieira Porphirio Veríssimo
• Support Opportunities: Scholarships in Brazil - Support Program for Fixating Young Doctors