Abstract
Lactarius volemus Fr. has been regarded as a great edible medicinal fungal resource in China. In this study, L. volemus Fr. polysaccharide (LVP) with an average molecular weight of 16.842 kDa was obtained by water extraction. The structure of LVP was characterized to be mannan, and the linkages in the mannan were found to comprise the Manp, (1→4)-α-Man and (1→4,6)-α-Man. Furthermore, intraperitoneal administration of LVP increased the thymus, spleen and liver indices, dose-dependently. Additionally, LVP enhanced the immune response and the phagocytic activities. Pathological evaluations showed that LVP in mice increased the proliferation of red medullary lymphocytes (60–70%). Collectively, these results indicated that LVP might be a potential resource of raw material for further investigations of functional foods.
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