Table 5

Production of TNF-α and IFN-γ by CD4+CD25 T lymphocytes (Teffs) alone and in the presence of CD4+CD25+ regulatory T cells (Tregs) at a 1:1 ratio

TNF-αIFN-γ
Teffs <5.0 <2.0 
Teffs + PHA 542.5 ± 130.5* 671.1 ± 18.4* 
Teffs + Tregs < 5.0 < 2.0 
Teffs + Tregs + PHA 272.9 ± 93.3 301.6 ± 65.5 
Teffs + Tregs + PHA + reserpine 304.3 ± 112.5 255.3 ± 101.8 
Tregs < 5.0 < 2.0 
Tregs + PHA 26.9 ± 46.6 40.4 ± 68.62 
TNF-αIFN-γ
Teffs <5.0 <2.0 
Teffs + PHA 542.5 ± 130.5* 671.1 ± 18.4* 
Teffs + Tregs < 5.0 < 2.0 
Teffs + Tregs + PHA 272.9 ± 93.3 301.6 ± 65.5 
Teffs + Tregs + PHA + reserpine 304.3 ± 112.5 255.3 ± 101.8 
Tregs < 5.0 < 2.0 
Tregs + PHA 26.9 ± 46.6 40.4 ± 68.62 

Cells were cultured for 48 hours under standard conditions in the absence or in the presence of 1 μ reserpine. Data are mean α SD of n = 3 separate observations and are expressed as pg/mL.

*

P < .001 versus Teffs alone.

P < .01 versus Teffs + PHA.

P < .05 versus Teffs + PHA.

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