Author(s):
Albuquerque, Bianca R. ; Finimundy, Tiane ; Pinela, José ; Pires, Tânia C.S.P. ; Calhelha, Ricardo C. ; Vaz, Josiana A. ; Corrêa, Rúbia C.G. ; Oliveira, Beatriz ; Barros, Lillian
Date: 2024
Persistent ID: http://hdl.handle.net/10198/29748
Origin: Biblioteca Digital do IPB
Project/scholarship:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00690%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0007%2F2020/PT;
info:eu-repo/grantAgreement/FCT/CEEC IND 2018/CEECIND%2F01011%2F2018%2FCP1578%2FCT0002/PT;
info:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F136370%2F2018/PT;
info:eu-repo/grantAgreement/FCT/POR_NORTE/COVID%2FBD%2F152908%2F2022/PT;
Subject(s): Myrtaceae; Food waste valorization; Phenolic compounds; Bioactive properties
Description
Aiming at valorising the Eugenia involucrata residue, the present work aimed in investigating the chemical profile and in vitro bioactivities of the residue (EIR) and its individual parts, i.e., seeds (EIS) and peels (EIP). Chromatographic analyses showed that EIP had the highest content of organic acids, tocopherols, and anthocyanins, whereas EIS was the richest in hydrolysable tannins. bis-HHDP-glucoside isomers and cyanidin-3-O-galactoside were the main detected phenolic compounds. By the cellular antioxidant activity (CAA) assay, the samples showed similar. antioxidant potential with 71%, 77%, and 80% inhibition for EIP, EIR, and EIS, respectively, while EIS demonstrated the best antioxidant activity by thiobarbituric acid reactive substances (TBARS, IC50 = 4.96 mu g/mL) and oxidative inhibition assay (OxHLIA, IC50 = 40 mu g/mL). The samples were able to inhibit the growth of seven bacteria and two fungi. Between the microorganisms tested, all samples showed a strong antibacterial activity (MIC = 0.156 mg/mL) against Yersinia enterocolitica and Pseudomonas aeruginosa (MIC = 0.156-0.625 mg/mL). Moreover, they also display a high antifungal activity against Arpergillus brasiliensis (MIC = 0.625 mg/mL). Furthermore, only EIR and EIS had anti-inflammatory effect via NO production inhibition (IC50 = 168-259 mu g/mL, respectively) and anti-proliferative activity towards four tumour and one non-tumour cell lines. These findings suggest that the biowaste generated during the processing of E. involucrata fruit has potential as a source of bioactive compounds.
The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds FCT/MCTES (PIDDAC) to CIMO (UIDB/00690/2020 and UIDP/00690/2020) and SusTEC (LA/P/0007/2020) . To the "La Caixa" Foundation and to FCT for the financial support through the mobilizing Project "Aquae Vitae - Thermal water as a source of life and health", "PROMOVE - O futuro do Interior" call 2020. To FCT for the contracts of J. Pinela (CEECIND/01011/2018) , R.C. Calhelha and L. Barros (CEEC Institutional) , and the PhD grants of B.R. Albuquerque (SFRH/BD/136370/2018 and COVID/BD/152908/2022) . To the MICINN for the Juan de la Cierva Formacion contract for T.C.S.P. Pires (FJC20120- 045405-I) . R.C.G. Correa is a research grant recipient of Cesumar Institute of Science, Technology, and Innovation (ICETI) .
