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- Title
Inhibition of IL-4 receptor up-regulation on B cells by antisense oligodeoxynucleotide suppresses IL-4-induced human IgE production.
- Authors
Ikizawa, K.; Kajiwara, K.; Koshio, T.; Matsuura, N.; Yanagihara, Y.
- Abstract
IL-4 is shown to up-regulate its own receptor (IL-4R) on human lymphocytes, but the functional significance of up-regulated IL-4R is not clear regarding IgE production. This study investigated the possible role of IL-4-induced up-regulation of IL-4R on B cells in the induction of human IgE synthesis by means of antisense strategy. Among three antisense oligodeoxynucleotides designed against the downstream of translation initiation site of IL-4R cDNA. S-oligo 1. complementary to nucleotide 1-24, showed the strongest inhibition of the constitutive expression of IL-4R on Daudi cells. Addition of S-oligo 1 together with IL-4 also decreased the up-regulated but not constitutive levels of IL-4R on peripheral blood B cells without affecting the concomitant enhancement of CD23, CD40, HLA-DR and surface IgM expression, indicating that its effect is specific for IL-4R up-regulation. When S-oligo 1 was added to B cells costimulated with IL-4 and anti-CD40 MoAb, it induced a dose-dependent inhibition of IgE production. This inhibition was accompanied by a decrease in the expression of mature O transcripts, whereas the accumulation of germ-line O transcripts was not affected by S-oligo 1. These data suggest that the signal transduction mediated by the up-regulated IL-4R on B cells may be intimately associated with the induction of isotype switching to IgE that leads to mature Cϵ transcription and IgE production.
- Subjects
B cells; INTERLEUKINS; LYMPHOCYTES; NUCLEOTIDES; CELLULAR signal transduction; RESPONSE inhibition
- Publication
Clinical & Experimental Immunology, 1995, Vol 100, Issue 3, p383
- ISSN
0009-9104
- Publication type
Article