4.7 Article

Immunostimulant effects and potential application of β-glucans derived from marine yeast Debaryomyces hansenii in goat peripheral blood leucocytes

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ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.05.061

关键词

beta-glucans; Immune response; Goats

资金

  1. CONACYT [INFR-2014-01/225924, PDCPN2014-01/248033]

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Debaryomyces hansenii has been described to be effective probiotic and immunostimulatory marine yeast in fish. Nonetheless, to the best of our knowledge, it has been not assayed in ruminants. This study attempts to describe the immunostimulatory effects of its beta-glucan content through in vitro assays using goat peripheral blood leukocytes at 24 h of stimulation. The structural characterization of yeast glucans by proton nuclear magnetic resonance indicated structures containing (1-6)-branched (1-3)-beta-D-glucan. In vitro assays using peripheral blood leukocytes stimulated with beta-glucans derived from three D. hansenii strains and zymosan revealed that beta-glucans significantly increased cell immune parameters, such as phagocytic ability, reactive oxygen species production (respiratory burst), peroxidase activity and nitric oxide production. Antioxidant enzymes revealed an increase in superoxide dismutase and catalase activities in leukocytes stimulated with yeast beta-glucans. This study revealed that yeast beta-glucans were able to activate dectin-1 mRNA gene expression in leukocytes. The TLR4 gene expression was up-regulated in leukocytes after stimulation with yeast beta-glucans. In conclusion, beta-glucans were able to modulate the immune system by promoting cell viability, phagocytic activity, antioxidant immune response and immune-related gene expression in leukocytes. Therefore, beta-glucans derived from Debaryomyces hansenii should be considered a potential immunostimulant for goat production systems. (C) 2018 Elsevier B.V. All rights reserved.

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