The kinetics and stimulant dependence of cytokine production by blood and bronchoalveolar lavage T cells evaluated at the single cell level.
We have previously shown that bronchoalveolar lavage (BAL) T cells from human airways predominantly produce interferon gamma (IFN-gamma) and interleukin 2 (IL-2) when stimulated ex vivo. The kinetics of TH1 and TH2 cell cytokine production by T cells from both blood and BAL were studied to establish the optimal time after stimulation either with pharbol myristate (PMA) and ionomycin or with the more physiological stimulus of anti-CD3 for intracellular cytokine detection of IFN-gamma, IL-2, IL-4 and IL-5 in both blood and BAL T cells. The optimal time for positive identification of IL-2 in both blood and BAL was 5 h after PMA/ionomycin stimulation, whereas the first peak for IFN-gamma was found after 5 h in blood but after only 3 h in BAL. T cells from different biological compartments responded differently to each of the stimuli. Whilst anti-CD3 stimulation did not induce TH1 cytokine production in blood T cells, it readily induced both IFN-gamma and IL-2 production in BAL T cells. The kinetics of cytokine production were found to be stimulus dependent. Whilst IL-2 production showed similar kinetics with both stimuli, the kinetics of IFN-gamma production differed between stimuli. We have also examined the effect of five different stimuli on cytokine production by T cells to determine whether different forms of stimulation may selectively stimulate or inhibit different cytokines. Not surprisingly, PMA/ionomycin induced a greater percentage of BAL T cells to produce TH1 cytokines. However, other than modest amounts of the TH2 cytokines IL-4 and IL-5 were not induced by any of the five stimuli.
Madden
J
J
University Medicine, Southampton General Hospital, Tremona Road, Southampton, UK.
Howarth
P P
PP
Godfrey
R R
RR
Frew
A A
AA
D000328:Adult; D000368:Aged; D000906:Antibodies / Q000494:pharmacology; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology*; D017252:CD3 Complex / Q000276:immunology; D016207:Cytokines / Q000097:blood* / Q000493:pharmacokinetics; D005260:Female; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D015759:Ionomycin / Q000494:pharmacology; D007476:Ionophores / Q000494:pharmacology; D007700:Kinetics; D008297:Male; D008875:Middle Aged; D013601:T-Lymphocytes / Q000378:metabolism; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
D000906:Antibodies; D017252:CD3 Complex; D016207:Cytokines; D007376:Interleukin-2; D007476:Ionophores; D015847:Interleukin-4; D015759:Ionomycin; D013755:Tetradecanoylphorbol Acetate