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Multiple Sclerosis
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Real-time TaqMan assay for myxovirus resistance protein (MxA) mRNA: a robust marker of interferon beta bioactivity in patients with multiple sclerosis

A.R. Pachner

Department of Neurosciences, University of Medicine and Dentistry of New Jersey, Newark, NJ, USA, pachner{at}umdnj.edu

For many patients suffering from MS, interferon beta (IFNß) is an effective therapeutic option; however, some patients who receive long-term IFNß therapy for relapsing-remitting MS (RRMS) develop neutralizing antibodies (NAbs) that affect IFNß efficacy. It is therefore important to evaluate patients' therapeutic response to IFNß over time. Myxovirus resistance protein A (MxA), a surrogate marker of individual immunologic response to IFNß, may be a useful tool for assessing IFNß immunogenicity. The real-time TaqMan assay for MxA messenger RNA (mRNA) has several distinct advantages, including the ability to amplify and complete quantitative analyses in one step, a high degree of quality control and prior experience and confidence in the field of quantitative viral diagnostics. The real-time TaqMan assay for MxA mRNA can be incorporated as a component of IFNß therapy to evaluate patients during the course of treatment. Multiple Sclerosis 2007; 13: S49—S52. http://msj.sagepub.com

Key Words: gene expression • interferons • multiple sclerosis • myxovirus resistance proteins • neutralizing antibodies • relapsing-remitting • Taq polymerase

Multiple Sclerosis, Vol. 13, No. 1 suppl, 49-52 (2007)
DOI: 10.1177/1352458507076991
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