We used flow cytometry to identify the presence of intracellular cytokines (cytoflow) and analyse the production of IL-4 in peripheral blood from AIDS patients who have practically no CD4+ T cells. We found that IL-4 was produced by CD3-CD4-CD8-CD56-CD19-CD14- cells and CD3+CD8 dull-positive cells in AIDS patients. Moreover, CD3-CD4-CD8-CD56-CD19-CD14- cells had helper activity for immunoglobulin synthesis. These findings indicate that instead of CD4+ T helper cells, C3-CD4-CD8-CD56-CD19-CD14- cells and CD3+CD8 dull-positive cells may be an important source of IL-4 in a variety of immune responses for AIDS patients.
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| http://dx.doi.org/10.1046/j.1365-2141.1998.00647.x | DOI Listing |
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