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- W2068040591 abstract "Glucuronoxylomannan (GXM) is the major Cryptococcus neoformans capsular polysaccharide and represents the main virulence factor of this fungus. In in vitro studies we have demonstrated previously that this acidic and high-molecular-weight polysaccharide suppresses lymphoproliferation, modulates cytokine production and promotes apoptosis in spleen mononuclear (Spm) cells from rats. In this study we demonstrate that these phenomena also occur in vivo after the intracardiac inoculation of GXM into normal Wistar rats. The results of this study show suppression of the proliferative response Spm cells to concanavalin A (Con A) or heat-killed C. neoformans (HKCn) in the first 2 weeks after polysaccharide administration. In addition, increased levels of interleukin (IL)-10 were produced by Con A-stimulated Spm cells, coinciding with immunohistochemical GXM detection in the white pulp of spleen. In particular, high production of IL-10 with diminution of IL-2, interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha synthesis were detected 14 days after GXM administration. In situ cell death detection by TdT-mediated biotin-dUTP nick-end labelling (TUNEL) reaction in sections of spleen, lung and liver demonstrates apoptosis in tissues with deposits of GXM. These data demonstrate the in vivo ability of GXM to modify cytokine synthesis by Spm cells and to promote host cell apoptosis." @default.
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- W2068040591 date "2004-11-01" @default.
- W2068040591 modified "2023-10-17" @default.
- W2068040591 title "Immunosuppression, interleukin-10 synthesis and apoptosis are induced in rats inoculated with Cryptococcus neoformans glucuronoxylomannan" @default.
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- W2068040591 doi "https://doi.org/10.1111/j.1365-2567.2004.01970.x" @default.
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