Phenolic-rich extracts from acerola, cashew apple and mango by-products cause diverse inhibitory effects and cell damages on enterotoxigenic Escherichia coli

Autor(es)

da Costa Lima, M. ^[1] ; Magnani, M. ^[2] ; dos Santos Lima, M. ^[3] ; de Sousa, C. P. ^[4] ; Dubreuil, J. D. ^[5] ; de Souza, E. L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Paraiba, Food Microbiol Lab, Dept Nutr, Hlth Sci Ctr, Joao Pessoa, Paraiba - Brazil

^[2] Univ Fed Paraiba, Dept Food Engn, Ctr Technol, Lab Microbial Processes Foods, Joao Pessoa, Paraiba - Brazil

^[3] Fed Inst Sertao Pernambuco, Dept Food Technol, Petrolina, PE - Brazil

^[4] Univ Fed Sao Carlos, Ctr Biol Sci & Hlth, Dept Morphol & Pathol, Sao Carlos, SP - Brazil

^[5] Univ Montreal, Fac Med Vet, St Hyacinthe, PQ - Canada

• Tipo de documento: Artigo Científico
• Fonte: Letters in Applied Microbiology; NOV 2021.
• Citações Web of Science: 0

Resumo

This study aimed to evaluate the inhibitory effects of phenolic-rich extracts from acerola (Malpighia emarginata D.C., PEA), cashew apple (Anacardium occidentale L., PEC) and mango (Mangifera indica L., PEM) by-products on distinct enterotoxigenic Escherichia coli (ETEC) strains. The capability of PEA and PEC of impairing various physiological functions of ETEC strains was investigated with multiparametric flow cytometry. Procyanidin B-2, myricetin and p-coumaric acid were the major phenolic compounds in PEA, PEC and PEM, respectively. PEA and PEC had lower minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) (MIC: 31 center dot 25 mg ml(-1); MBC: 62 center dot 5 mg ml(-1)) on ETEC strains than PEM (MIC and MIC: >1000 mg ml(-1)). PEA and PEC (15 center dot 6, 31 center dot 2, 62 center dot 5 mg ml(-1)) caused viable count reductions (P < 0 center dot 05) on ETEC strains after 24 h of exposure, notably the >= 3 log reductions caused by 62 center dot 5 mg ml(-1). The 24 h exposure of ETEC strains to PEA and PEC (31 center dot 2, 62 center dot 5 mg ml(-1)) led to high sizes of cell subpopulations with concomitant impairments in cell membrane polarization and permeability, as well as in enzymatic, respiratory and efflux activities. PEA and PEC are effective in inhibiting ETEC through a multi-target action mode with disturbance in different physiological functions. (AU)

• Processo FAPESP: 16/13423-5 - Compostos produzidos por microrganismos endofíticos isolados de plantas do cerrado: bioatividade, associação com a-Ag2WO4 e aplicações biotecnológicas
• Beneficiário: Cristina Paiva de Sousa
• Modalidade de apoio: Auxílio à Pesquisa - Regular