Predictors of response to rituximab in patients with neuropathy and anti-myelin associated glycoprotein immunoglobulin M

Luana Benedetti, Chiara Briani, Marina Grandis, Tiziana Vigo, Marco Gobbi, Elisabetta Ghiglione, Marinella Carpo, Dario Cocito, Christina M. Caporale, Maria P. Sormani, Giovanni L. Mancardi, Eduardo Nobile-Orazio, Angelo Schenone

Research output: Contribution to journalArticle

Abstract

We evaluated the efficacy and safety of rituximab in an open-label, uncontrolled study of 13 patients with polyneuropathy associated with antibodies to myelin-associated glycoprotein (MAG) and correlated the response to therapy with clinical and laboratory features. One year after rituximab therapy, anti-MAG immunoglobulin M (IgM) titers were significantly reduced. At that time, eight patients (62%) had improved in both the inflammatory neuropathy cause and treatment (INCAT) sensory sumscore and the Medical Research Council sumscore for muscle strength and seven of them also in the INCAT disability score. The improvement in the mean INCAT sensory sumscore was significant at 12 months and correlated with lower anti-MAG antibody at entry and at follow-up. This study suggests that rituximab may be efficacious in patients with anti-MAG associated neuropathy and particularly on sensory impairment and in those with moderately elevated antibody titers. These findings suggest that antibody reduction below a critical level may be necessary to achieve clinical improvement.

Original languageEnglish
Pages (from-to)102-107
Number of pages6
JournalJournal of the Peripheral Nervous System
Volume12
Issue number2
DOIs
Publication statusPublished - Jun 2007

Keywords

  • Anti-MAG antibodies
  • Anti-MAG polyneuropathy
  • IgM
  • Monoclonal gammopathy
  • Rituximab

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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    Benedetti, L., Briani, C., Grandis, M., Vigo, T., Gobbi, M., Ghiglione, E., Carpo, M., Cocito, D., Caporale, C. M., Sormani, M. P., Mancardi, G. L., Nobile-Orazio, E., & Schenone, A. (2007). Predictors of response to rituximab in patients with neuropathy and anti-myelin associated glycoprotein immunoglobulin M. Journal of the Peripheral Nervous System, 12(2), 102-107. https://doi.org/10.1111/j.1529-8027.2007.00129.x