Abstract:
OBJECTIVE:To evaluate the effects of mitoxantrone (Mx) in progressive multiple sclerosis (MS) on MRI. METHODS:A total of 194 patients with worsening relapsing-remitting or secondary progressive MS were treated with Mx 12 mg/m2 (n = 34), Mx 5 mg/m2 (n = 40), or placebo (n = 36) at 3-month intervals IV over a 2-year period. In preselected MRI centers unenhanced and Gd-enhanced MRI scans were performed at month (M) 0, 12, and 24 in a non-randomized subset of 110 patients and non-selected for MRI criteria. The primary MRI outcome measure was the total number of MRI scans with positive Gd enhancement per group. RESULTS:Twelve mg/m2 Mx failed to reach a significant difference from placebo as measured by the primary MRI outcome at month 12 (p = 0.431) and 24 (p = 0.065). Secondary MRI outcome measures: 5 mg/m2 Mx influenced favorably the number of Gd-enhancing lesions only at month 24 (p = 0.004), but not at month 12 (p = 0.095). Twelve mg/m2 Mx reduced the number of T2-weighted lesions at month 24 (p = 0.027) and showed a positive trend at month 12 (p = 0.069), but not 5 mg/m2 Mx. The number of active MR lesions showed a strong trend toward reduction in the 12 mg/m2 Mx group only at month 24 (p = 0.054). All comparisons are vs placebo, and unadjusted for baseline incidence. CONCLUSIONS:In the MIMS trial 12 mg/m2 Mx does not reduce the number of MRI scans with positive Gd enhancement at month 12 and 24 vs placebo. Results of secondary MRI outcome measures are suggestive of a positive impact of 12 and 5 mg/m2 Mx on some of the Gd enhanced and unenhanced MRI measures as expected from other Mx MRI studies in the past.
journal_name
Neurologyjournal_title
Neurologyauthors
Krapf H,Morrissey SP,Zenker O,Zwingers T,Gonsette R,Hartung HP,MIMS Study Group.doi
10.1212/01.wnl.0000174439.70369.7asubject
Has Abstractpub_date
2005-09-13 00:00:00pages
690-5issue
5eissn
0028-3878issn
1526-632Xpii
65/5/690journal_volume
65pub_type
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