Yeast cell wall polysaccharides enhanced expression of T helper type 1 and 2 cytokines profile in chicken B lymphocytes exposed to LPS challenge and enzyme treatment. Issue 1 (2nd January 2021)

• Record Type: Journal Article
• Authors: Echeverry, H.; Alizadeh, M.; Yitbarek, A.; Slominski, B.; Rodriguez-Lecompte, J. C.
• Is Part Of: British poultry science. Volume 62:Issue 1(2021)
• Page Start: 125
• Page End: 130
• Publication Date: 2021-01-02
• Subjects: Endotoxin -- B lymphocytes -- lytic -- immunomodulation -- lymphokine; Poultry -- Periodicals; Poultry industry -- Periodicals; 636.500941
• DOI: 10.1080/00071668.2020.1817328
• Languages: English
• ISSNs: 0007-1668

Abstract

ABSTRACT: 1. The objective of this study was to investigate the potential immunomodulatory effects of yeast ( Saccharomyces cerevisiae) and yeast-derived products treated with a cell wall lytic enzyme mixture on the gene expression of toll-like receptors and cytokines of chicken B cell line (DT 40) stimulated with lipopolysaccharide. 2. The effect of brewer's yeast (Y), yeast cell wall (YCW), distilled dried grains with solubles (DDGS) and a processed yeast + nucleotide-rich product (PY/N) treated with a yeast cell wall lytic enzyme (E) was assessed using a chicken B cells and LPS challenge model. 3. Relative gene expression of toll-like receptors (TLRs) and cytokines was investigated. Treatment of cells with Y, YCW, YCW + E and PY/N upregulated the expression of TLR2b following LPS challenge. Gene expression of TLR4 was downregulated in E, YCW and YCW + E treatments compared to control, while adding DDGS and PY/N upregulated the expression of TLR4 either before or after enzyme treatment. Following LPS challenge, expression of IL-4 and IL-10 was upregulated in cells treated with YCW and PY/N, both pre and post enzyme incubation. Adding YCW and PY/N to the cells challenged with LPS upregulated the expression of IFN-γ and IL-12 before and after enzyme treatment. Treatment of cells with YCW, DDGS and PY/N increased the expression of IL-6 prior to LPS challenge. 4. In conclusion, the results suggested that yeast-derived products affected immunomodulatory activities by changing the expression of cytokines involved in the innate immune response.