Jad. Cooper et al., Attenuation of interleukin-8 production by inhibiting nuclear factor-kappaB translocation using decoy oligonucleotides, BIOCH PHARM, 59(6), 2000, pp. 605-613
Interleukin-8 (IL-8), a monocyte-derived neutrophil chemoattractant factor,
is a polymorphonuclear neutrophil chemotaxin that is involved in a number
of inflammatory disorders. Transcription of the IL-8 gene is controlled by
regulatory proteins, including nuclear factor-kappa B (NF kappa B), a famil
y of proteins that is important in the transcriptional control of a number
of genes. When cells are activated, NF-kappa B translocates from the cytopl
asm to the nucleus, where it activates transcription by binding to a specif
ic sequence within the 5' untranslated region of the gene. During transloca
tion, NF-kappa B is potentially susceptible to diversion by oligonucleotide
s that contain the binding sequence for this protein. In the current study,
we produced phosphorothioate-modified oligonucleotides containing the spec
ific DNA sequence that NF-kappa B binds within the IL-8 gene. We then inves
tigated the effects of transfection of monocytes with these oligonucleotide
s on interleukin-1 beta (IL-1 beta)-stimulated IL-8 production IL-8 mRNA ex
pression, and NF-kappa B binding activity. We found that transfection with
these oligonucleotides significantly inhibited monocyte IL-8 production. A
single-stranded oligonucleotide with two copies of the NF-kappa B-binding s
equence was the most potent of those tested. This single-stranded oligonucl
eotide also inhibited IL-1 beta-induced translocation of NF-kappa B to the
nucleus and reduced IL-8 mRNA expression. These studies demonstrated that m
onocyte production of IL-8 can be attenuated using a single-stranded oligon
ucleotide that binds a transcriptional activating protein before it translo
cates to the cell nucleus. This approach ultimately may be useful in the co
ntrol of inflammation involved in a number of diseases. (C) 2000 Elsevier S
cience Inc.