Características químicas e citotoxicidade da pectina de camu-camu [Myrciaria dubia (H.B.K.) Mcvaugh]

Bruno Firmeza Viana; Arcelina Pacheco Cunha; Nágila Maria Pontes Silva  Ricardo; Lyara Barbosa Nogueira Freitas; Luzia Kalyne Almeida Moreira Leal; Ana Carolina Barbosa Ribeiro; Derlange Belizário Diniz

doi:10.59171/nutrivisa-2020v7e13741

Autores

Bruno Firmeza Viana Universidade Estadual do Ceará (UECE).
Arcelina Pacheco Cunha Universidade Federal do Ceará (UFC)
Nágila Maria Pontes Silva Ricardo Universidade Federal do Ceará (UFC)
Lyara Barbosa Nogueira Freitas Universidade Federal do Ceará (UFC)
Luzia Kalyne Almeida Moreira Leal Universidade Federal do Ceará (UFC)
Ana Carolina Barbosa Ribeiro Universidade Federal do Ceará (UFC)
Derlange Belizário Diniz Universidade Estadual do Ceará (UECE).

DOI:

https://doi.org/10.59171/nutrivisa-2020v7e13741

Palavras-chave:

Pectina. Myrciaria dubia. Espectroscopia de Ressonância Magnética. Espectrofotometria Infravermelho. Testes de toxicidade.

Resumo

O objetivo do presente trabalho foi caracterizar a estrutura química e toxicidade da pectina do camu-camu (Myrciaria dubia H. B. K. (McVough). Sua estrutura química foi analisada por espectroscopia de absorção na região do infravermelho (FT-IR), ressonância magnética nuclear de hidrogênio e de carbono (RMN ¹H e RMN ¹³C), análise elementar (AE), calorimetria exploratória de varredura (DSC) e análise termogravimétrica (TGA/DTG), assim como ensaio de toxicidade em neutrófilos humanos. Identificou-se grupos hidroxila, α-D-galacturônico, β-D-galactopiranosil, Arabinose, L-Ramnose metilada, grupos CH₂, grupos carboxílicos metil esterificados e livres, grupos acetila, grupos carboxilatos e anel piranosídico, assim como grau de metoxilação entre 40,8 e 44,7 %. AE indicou presença de sódio e nitrogênio a 1,88%, e a degradação ocorreu acima de 240ºC. Não houve toxicidade da pectina em neutrófilos. Concluiu-se que a pectina do camu-camu apresentou baixo grau de metoxilação e ausência de toxicidade aos neutrófilos, possibilitando o seu uso biotecnológico.

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