Abstract
Three bioactive fractions isolated from Cerrena unicolor cultures-crude endopolysaccharide (c-EPS), laccase, and a subfraction of low-molecular weight secondary metabolites-were used to determine potential cytotoxic effects on the mouse melanoma B16-F10 cell line (American Type Culture Collection CRL-6475). The results obtained prove that all examined fractions exhibited activity against the investigated tumor cells. In addition, an evident immunomodulatory effect of the c-EPS fraction was observed. Our results show that the levels of 2 cytokines (tumor necrosis factor-a and chemokine ligand 2) in mouse inner medullary collecting duct mIMCD-3 cells (American Type Culture Collection CRL-2123) stimulated by c-EPS were significantly higher. A lipopolysaccharide model was used at the same concentration (10 μg/mL) as a positive control.
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