Prospecção química de carboidratos isolados dos basidiomas das linhagens branca e cinza do cogumelo medicinal Grifola frondosa (“Maitake”)
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Data
2015-03-31
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Universidade Federal de Goiás
Resumo
Mushrooms have been valued as a functional food and dietary supplement for
humanity, due to the presence of substances with high nutritional value and/or
therapeutic. Among the mushrooms recognized for its therapeutic properties we
have is the leafy Grifola, popularly known as “Maitake”, which has important
pharmacological actions such as anti-tumor, immunomodulatory, antiinflammatory,
antioxidant, and others, which have been mainly related to its
carbohydrates. Nevertheless, this study aimed to review the chemistry of the
polysaccharides from mushroom of the two lines ("white" and "gray",
represented as Gfb and Gfc, respectively) of G. frondosa leafy that have been
cultivated in Brazil. From these type it was obtained branched -glucans
containing links of type (13) (16) and heteropolysaccharides formed mainly
by galactose (heterogalactan) or mannose (heteromannan). The heterogalactan
composed mainly of fucose (15.7%), mannose (20.5%) and galactose (63.8%)
was denominated fucomannogalactan (FMG-Gfb). It contains a main chain
consisting of units of α-D-Galp and 3-Me-O-α-D-Galp connected (16), which
are present partially substituted by O-2 disaccharide 3-O- α-D-Manp-α-L-Fucp
to a lesser extent with terminal non-reducing α-L-Fucp and α-D-Manp. The
heteromannan composed of fucose (6.9%), xylose (33.1%) and mannose
(60.0%), a fucoxylomannan (FXM-Gfc) was found to be composed of a
backbone of units α-D-Manp (13) connected, and a part of them substituted
by O-3 side chains made of fucose and xylose. The results of this study suggest
that there are no significant differences between the carbohydrate of both
strains, showing that white strain it provide the therapeutic effects attributed to
carbohydrates of another strain.
Descrição
Palavras-chave
Cogumelos medicinais, Grifola frondosa, Polissacarídeos, Medicinal mushroom, Grifola frondosa, Polysaccharides
Citação
BITENCOURT, E. L. Prospecção química de carboidratos isolados dos basidiomas das linhagens branca e cinza do cogumelo medicinal Grifola frondosa (“Maitake”). 2015. 119 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Catalão, 2015.