Antisense oligonucleotides to interleukin-4 regulate IgE and IgG2a production by spleen cells from Nippostrongylus brasiliensis-infected rats

European Journal of Immunology
N BenbernouM Guenounou

Abstract

Interleukin-4 (IL-4) plays a key role in the regulation of immunoglobulin production. In the present study, we examined the role of IL-4 in the production of IgE and IgG2a by spleen cells from Nippostrongylus brasiliensis-infected rats using the antisense oligonucleotide strategy. Three antisense oligonucleotides (15 and 20 nucleotides) were selected near the ATG initiation codon of the murine IL-4 gene. Significant and reproducible inhibitions of IgE and IgG2a production were observed with the addition of two different oligonucleotides, the most inhibitory being specific for 15 nucleotides corresponding to the downstream AUG sequence oligodeoxynucleotide (ODN-1), while the corresponding sense sequence had no effect. The inhibition was directly related to the ODN-1 concentration on IgE response, and IgG2a production was more sensitive to the inhibitory effect of ODN-1 than the IgE response. Our results suggest that the ODN-1 effect is rather specific for the IL-4 gene since the production of other cytokines was not modified and the exogenous addition of IL-4 reversed the ODN-1 effect. In contrast to IgE and IgG2a, ODN-1 induced a significant enhancement of IgM synthesis. The use of a phosphorothioate ODN of the same sequence as...Continue Reading

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Aug 23, 2003·Experimental Parasitology·Christine PierrotJamal Khalife
May 29, 2010·International Immunology·Svetlana V BaranovaGeorgy A Nevinsky
Aug 25, 2011·International Immunology·Elena S OdintsovaGeorgy A Nevinsky
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