Lymphoid hyperplasia in transgenic mice over‐expressing a secreted form of the human interleukin‐1β gene product
- 1 January 1999
- journal article
- research article
- Published by Wiley in Immunology
- Vol. 96 (1) , 128-137
- https://doi.org/10.1046/j.1365-2567.1999.00655.x
Abstract
To evaluate the biological effects of over-expression of interleukin-1β (IL-1β) on the immune system we have generated transgenic mice, expressing the IL-1β gene fused to a heterologous signal sequence under the control of the mouse immunoglobulin enhancer (Eμ). A prominent hyperplasia and a disturbed microarchitecture of lymphoid tissues were observed in the transgenic mice. The CD4+ T cells in the hyperplastic lymphoid organs seemed to invade the majority of the lymphoid organs including B-cell restricted areas. Analysis of lymph node cells revealed an increased frequency of CD4+ CD44high CD62L− T cells and local secretion of IL-2 and IL-4, compatible with an elevated number of activated T cells. Furthermore, significant levels of human IL-1β in sera and high concentrations of serum immunoglobulin G (IgG) were observed in the transgenic mice. The data suggest a role for IL-1β in controlling lymphoid microarchitecture and, when over-expressed, breaking the threshold in T-helper–B-cell interaction.Keywords
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