Cytokine detection by multiplex technology useful for assessing antigen specific cytokine profiles and kinetics in whole blood cultured up to seven days

Cytokine
Maria LagreliusHans Gaines

Abstract

Cytokine profile assessment is important to characterize immune responses to pathogens. To identify optimal time points for determination of cytokine profiles, we diluted whole blood 1:10, to enable daily cytokine measurements during one week. Cultures for 10 blood donors were set up in the presence of phytohemagglutinin (PHA), cytomegalovirus (CMV) or Candida. Supernatant levels of interleukin-2 (IL-2), IL-4, IL-5, IL-6, IL-10, IL-12, IL-13, IL-17, interferon-gamma (IFN-gamma), granulocyte/macrophage colony-stimulating factor, and tumor necrosis factor-alpha (TNF-alpha), were determined by multiplex technique, and intracellular cytokine staining (ICS) was employed to detect IFN-gamma, IL-2, IL-4 and IL-13 in CD3+ cells. The multiplex analysis detected representative cytokine profiles for the majority of the cytokines on day 7 by identifying peak levels or good correlation with peak levels, with the exception of IL-2 and TNF-alpha in PHA and CMV cultures and IL-10 in PHA cultures. For these cytokines an extracellular measurement on day 2-3 would be appropriate. The intracellular cytokines showed distinct kinetics for IFN-gamma and IL-2, while IL-4 and IL-13 were not detected at all with ICS. In conclusion, the combination of wh...Continue Reading

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