Relative quantitative kinetics of interferon-gamma and interleukin-10 mRNA and protein production by activated ovine peripheral blood mononuclear cells
Interferon-gamma (IFN-γ) and interleukin (IL)-10 are cross-regulatory cytokines capable of driving and controlling the adaptive host immune response. The inter-relationship between IFN-γ and IL-10 expression has not been defined in sheep despite biological evidence suggesting that they perform simil...
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Published in | Veterinary immunology and immunopathology Vol. 136; no. 1; pp. 34 - 42 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Netherlands
Elsevier B.V
01.07.2010
Amsterdam: Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Interferon-gamma (IFN-γ) and interleukin (IL)-10 are cross-regulatory cytokines capable of driving and controlling the adaptive host immune response. The inter-relationship between IFN-γ and IL-10 expression has not been defined in sheep despite biological evidence suggesting that they perform similar functions to their orthologues described in other species. To address this, we have developed a quantitative (q)PCR method to assess relative levels of IFN-γ and IL-10 mRNA expression in activated ovine peripheral blood mononuclear cells (PBMC) and compared the kinetics of mRNA expression with amounts of cytokine secreted by the cells over a 96
h period. PBMC were collected from sheep immunised with the nominal antigen ovalbumin (Ova) and re-stimulated
in vitro with antigen and the T cell mitogen concanavalin A (ConA). The recall response to antigen was characterised by a single peak in IFN-γ mRNA expression at 48
h of culture (13-fold increase over unstimulated cells) and relatively lower expression of IL-10 mRNA (average 2–3-fold increase over the 96
h culture period). Antigen-driven IFN-γ protein concentration was greatest at the end of the culture period (96
h) whereas IL-10 protein level was not elevated above that observed in unstimulated cells. The typical response to ConA was greater for both cytokines, with IFN-γ mRNA expression peaking at 6
h of culture (133-fold increase) then declining rapidly whereas IL-10 mRNA expression peaked at 24
h (16-fold increase) and declined more gradually. Despite these differences in the relative kinetics of mRNA expression in mitogen-activated PBMC, the typical pattern of protein expression of the two cytokines was similar. Both showed a gradual rise in protein concentration starting from 12
h of culture which was still rising at the end of the culture period (96
h). These data demonstrate that the kinetics of mRNA expression for IFN-γ and IL-10 in activated ovine PBMC do not necessarily correlate with detectable protein in culture. |
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Bibliography: | http://dx.doi.org/10.1016/j.vetimm.2010.02.004 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0165-2427 1873-2534 |
DOI: | 10.1016/j.vetimm.2010.02.004 |