Abstract
The anti-leishmanial effect of the 'carbohydrate-fraction', isolated from an edible mushroom Astraeus hygrometricus,was evaluated against Leishmania donovani infection both in vitro and in vivo. Ahf-Car induced the expression of inducible nitric oxide synthase 2 (iNOS2) and pro-inflammatory cytokines like TNF-α and IL-12, with subsequent downregulation of the anti-inflammatory cytokines as TGF-βand IL-10, in vitroandin vivoalong with a remarkable increase in the expressions of IL-6, IL-1β, IFN-γ and IRFs, IRF-7 and IRF-8in vivo. Ahf-Car also reduced the parasite burden in the spleen and liver dose-dependently with a simultaneous proliferation of Ly6C+ cells in the bone marrow of Leishmania-infected experimental animals. It also increased the monocyte population dose-dependently and the expression of the myeloid transcription factor PU.1,invivo, which presumably signifies the expansion of protective macrophages. Thus, Ahf-Car might be a potent anti-leishmanial lead with unique and effective adjuvant capacity.
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