alexa Toll-like receptor, MHC II, B7 and cytokine expression by porcine monocytes and monocyte-derived dendritic cells in response to microbial pathogen-associated molecular patterns.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Raymond CR, Wilkie BN

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Abstract To evaluate effects of treatment with pathogen-associated molecular patterns (PAMPs) on toll-like receptor (TLR), MHC II, B7 and cytokine expression, pig monocytes and monocyte-derived DCs (moDCs) were treated with LPS, CpG, lipoteichoic acid (LTA), poly IC or peptidoglycan (Pep). Monocytes and moDCs treated with LPS, CpG, LTA, poly IC or Pep altered expression of at least one TLR (4, 5 and 9) and up-regulated MHC II and/or B7. The mRNA for IL-4 was not detected after any treatment. Treatment with LPS or LTA tended to up-regulate mRNA for TLR 4, Th-1 (IFN-gamma and IL-12p35) and Th-2 cytokines (IL-10 and IL-13). Poly IC or CpG tended to up-regulate TLR 9 and Th-1 cytokines. Porcine monocytes and moDCs like those of humans and mice responded to microbial PAMPs by altering TLR expression, up-regulating MHC II and B7 and altering cytokine expression toward Th-1 and/or Th-2, which may steer immune response. Hence, porcine moDCs and monocytes are likely able to discriminate between microorganisms using TLRs which determine cytokine expression and immune response bias. This article was published in Vet Immunol Immunopathol and referenced in Journal of Clinical & Cellular Immunology

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