Prolonged IL-4 Treatment Decreases the Tnp-Specific Memory Formation for IgG1
IL-4 is a pleiotropic lymphokine, produced mainly by activated T-cells, which has a number of activities on B cells1. It is obligatory for IgE synthesis, and has an enhancing effect on the IgG1 production2. Whereas it is impossible to detect IgE in nematode infected mice which are made IL-4 deficient by gene targetting, IgG1 can be detected, but the level is only one-sixth that of control mice3. The aim of this study was to investigate the effect of prolonged IL-4 treatment on the total and antigen-specific serum IgG1 levels. Furthermore, we investigated the effect of such treatment on the memory formation for IgG1 To that end, BALB/c mice were treated for a period of three months with IL-4 after primary TNP-RIgG immunization. We used a method for cytokine administration that allowed persistent IL-4 levels for a prolonged period of time4.
KeywordsTreated Mouse Control Treated Mouse Cytokine Administration CDC35 Cell Trinitrobenzenesulphonic Acid
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