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Interleukin-1 receptor antagonist, soluble tumor necrosis factor-alpha receptor type I and II, and soluble E-selectin serum levels in multiple sclerosis patients receiving weekly intramuscular injections of interferon-beta1a.
European Cytokine Network 2000 March
BACKGROUND: interferon beta (IFN-beta) reduces relapse rate and disease progression in patients with the relapsing-remitting form of multiple sclerosis (RRMS). IFN-beta may act by upregulating the expression of anti-inflammatory components of the immune system.
OBJECTIVES: To determine whether weekly intramuscular (i.m.) injection of IFN-beta1a had a short- or long-term effect on the expression of naturally occurring soluble factors that play an immunosuppressive role within the cytokine network.
MATERIALS AND METHODS: serum levels of interleukin-1 receptor antagonist (IL-1Ra), soluble tumor necrosis factor alpha receptor type I and type II (sTNF-alphaRI and sTNF-alphaRII), and soluble E-selectin (sE-Sel) were followed over time in ten patients with RRMS who were treated with weekly i.m. injections of 30 mg (= 6 MU) of IFN-beta1a. Patient sera were sampled before, and 24, 48, 72, 96, and 168 hours after the first IFN-beta1a injection (short-term), and then at 1, 3, 6, 9 and 12 months after therapy initiation (long-term); highly sensitive, commercially available ELISA tests were used.
RESULTS: serum levels of IL-1Ra, sTNF-alphaRI and sTNF-alphaRII, but not sE-Sel were significantly increased in both short- and long-term follow-up. Interestingly, IL-1Ra, sTNF-alphaRI and sTNF-alphaRII behaviors were completely different, suggesting that these naturally occurring immunoregulatory factors were differentially affected by IFN-beta1a.
CONCLUSION: our study demonstrates that weekly i.m. injection of 30 mg of IFN-beta1a induces the expression of soluble mediators that may suppress the activities of pro-inflammatory cytokines such as IL-1 and TNF-alpha.
OBJECTIVES: To determine whether weekly intramuscular (i.m.) injection of IFN-beta1a had a short- or long-term effect on the expression of naturally occurring soluble factors that play an immunosuppressive role within the cytokine network.
MATERIALS AND METHODS: serum levels of interleukin-1 receptor antagonist (IL-1Ra), soluble tumor necrosis factor alpha receptor type I and type II (sTNF-alphaRI and sTNF-alphaRII), and soluble E-selectin (sE-Sel) were followed over time in ten patients with RRMS who were treated with weekly i.m. injections of 30 mg (= 6 MU) of IFN-beta1a. Patient sera were sampled before, and 24, 48, 72, 96, and 168 hours after the first IFN-beta1a injection (short-term), and then at 1, 3, 6, 9 and 12 months after therapy initiation (long-term); highly sensitive, commercially available ELISA tests were used.
RESULTS: serum levels of IL-1Ra, sTNF-alphaRI and sTNF-alphaRII, but not sE-Sel were significantly increased in both short- and long-term follow-up. Interestingly, IL-1Ra, sTNF-alphaRI and sTNF-alphaRII behaviors were completely different, suggesting that these naturally occurring immunoregulatory factors were differentially affected by IFN-beta1a.
CONCLUSION: our study demonstrates that weekly i.m. injection of 30 mg of IFN-beta1a induces the expression of soluble mediators that may suppress the activities of pro-inflammatory cytokines such as IL-1 and TNF-alpha.
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