Relative quantitative kinetics of interferon-gamma and interleukin-10 mRNA and protein production by activated ovine peripheral blood mononuclear cells

被引:9
作者
Wattegedera, S. R. [1 ]
Watson, D. M. [1 ]
Hope, J. C. [2 ]
Kaiser, P. [2 ]
Sales, J. [3 ]
McInnes, C. J. [1 ]
Entrican, G. [1 ]
机构
[1] Moredun Res Inst, Int Res Ctr, Penicuik EH26 0PZ, Midlothian, Scotland
[2] Inst Anim Hlth, Newbury RG20 7NN, Berks, England
[3] Biomath & Stat Scotland, Edinburgh EH9 3JZ, Midlothian, Scotland
基金
英国生物技术与生命科学研究理事会;
关键词
Ovine immunology; Immune regulation; Quantitative PCR; Cytokine biology; CYTOKINE PRODUCTION; T-CELLS; RT-PCR; EXPRESSION; SHEEP; QUANTIFICATION; INFECTION; IMMUNITY; GROWTH; IL-10;
D O I
10.1016/j.vetimm.2010.02.004
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Interferon-gamma (IFN-gamma) and interleukin (IL)-10 are cross-regulatory cytokines capable of driving and controlling the adaptive host immune response. The inter-relationship between IFN-gamma 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-gamma 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-gamma 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-gamma 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-gamma 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-gamma and IL-10 in activated ovine PBMC do not necessarily correlate with detectable protein in culture. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:34 / 42
页数:9
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