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Antisense blockade of inducible nitric oxide synthase in glial cells derived from adult SJL mice

Antisense blockade of inducible nitric oxide synthase in glial cells derived from adult SJL mice

Neuroscience Letters 220(2): 89-92

Increasing evidence suggests a correlation between cytokine-induced nitric oxide synthase (iNOS) and demyelination in Multiple sclerosis (MS). Inhibition of iNOS may therefore be a novel therapeutic approach in MS. To test an antisense oligodeoxynucleotide (ODN) knockdown strategy for inhibiting iNOS, we used lipopolysaccharide (LPS) together with gamma-interferon (IFN-gamma) to induce iNOS in adult mouse mixed glial cell cultures. We administered an iNOS-derived antisense phosphorothiorate oligodeoxynucleotide (S-ODN) to block the induction. The antisense ODN treatment resulted in significant inhibition of LPS and IFN-gamma induced iNOS mRNA and protein expression. It also inhibited nitric oxide (NO) and cyclic GMP (cGMP) production in a dose dependent fashion. Sense and random S-oligo had no effect in any of these studies. These data indicate the efficacy and specificity of the antisense oligodeoxynucleotide approach in inhibiting iNOS in glial cells.

Accession: 009770868

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PMID: 8981480

DOI: 10.1016/s0304-3940(96)13229-8

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