The incidence and significance of anti-natalizumab antibodies: results from AFFIRM and SENTINEL.

Abstract:

OBJECTIVE:To determine the incidence and clinical effects of antibodies that develop during treatment with natalizumab. METHODS:In two randomized, double-blind, placebo-controlled studies (natalizumab safety and efficacy in relapsing remitting multiple sclerosis [MS, AFFIRM] and safety and efficacy of natalizumab in combination with interferon beta-1a [INF beta]1a] in patients with relapsing remitting MS [SENTINEL]) of patients with relapsing multiple sclerosis, blood samples were obtained at baseline and every 12 weeks to determine the presence of antibodies against natalizumab. Antibodies to natalizumab were measured using an ELISA. Patients were categorized as "transiently positive" if they had detectable antibodies (>or=0.5 microg/mL) at a single time point or "persistently positive" if they had antibodies at two or more time points >or=6 weeks apart. RESULTS:In the AFFIRM study, antibodies were detected in 57 of 625 (9%) of natalizumab-treated patients: Twenty (3%) were transiently positive and 37 (6%) were persistently positive. Persistently positive patients showed a loss of clinical efficacy as measured by disability progression (p

journal_name

Neurology

journal_title

Neurology

authors

Calabresi PA,Giovannoni G,Confavreux C,Galetta SL,Havrdova E,Hutchinson M,Kappos L,Miller DH,O'Connor PW,Phillips JT,Polman CH,Radue EW,Rudick RA,Stuart WH,Lublin FD,Wajgt A,Weinstock-Guttman B,Wynn DR,Lynn F,Panzar

doi

10.1212/01.wnl.0000277457.17420.b5

subject

Has Abstract

pub_date

2007-10-02 00:00:00

pages

1391-403

issue

14

eissn

0028-3878

issn

1526-632X

pii

01.wnl.0000277457.17420.b5

journal_volume

69

pub_type

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