A short-term randomized MRI study of high-dose oral vs intravenous methylprednisolone in MS. A sham-controlled trial of a 5-day course of repetitive transcranial magnetic stimulation of the unaffected hemisphere in stroke patients. Effects of IV methylprednisolone on brain atrophy in relapsing-remitting MS.
To compare the efficacy, tolerability, and safety of IV methylprednisolone (IV MP) vs oral methylprednisolone (oMP) at equivalent high doses in patients with multiple sclerosis (MS) experiencing a recent relapse.
                Patients with a clinical relapse within the previous 2 weeks and at least 1 gadolinium (Gd)-enhancing lesion on a screening brain MRI scan were included. Forty patients with MS were randomized to receive either 1 g/day for 5 days of oMP (20 patients) or 1 g/day for 5 days of IV MP (20 patients). Expanded Disability Status Scale (EDSS) and brain MRI (dual-echo and postcontrast T1-weighted scans) were assessed at baseline and at weeks 1 and 4. The study primary research question (endpoint) was to compare the efficacy of the 2 treatment routes in reducing the number of Gd-enhancing lesions after 1 week from treatment initiation. Secondary outcomes were safety, tolerability, and clinical efficacy profiles of the 2 routes of administration.
                The 2 groups showed a reduction of Gd-enhancing lesions over time (p = 0.002 for oMP and p = 0.001 for IV MP) with a "non-inferiority effect" between the 2 routes of administration at week 1. Both groups showed an improvement of EDSS over time (p < 0.001) without between-group difference at week 4. Both treatments were well-tolerated and adverse events were minimal and occurred similarly in the 2 treatment arms.
                Oral methylprednisolone (oMP) is as effective as IV methylprednisolone in reducing gadolinium-enhancing lesions in patients with MS soon after an acute relapse with similar clinical, safety, and tolerability profiles. This study provides class III evidence that 1 g oMP x 5 days is not inferior to 1 g IV MP x 5 days in reducing the number of gadolinium-enhancing lesions over a period of 1 week (mean difference in lesion reduction comparing IV MP to oMP is -20%, 95% confidence interval -48% to + 5%). It has been recently shown that a single session of repetitive transcranial magnetic stimulation (rTMS) of the unaffected hemisphere can improve motor function in stroke patients; however, this improvement is short-lasting. We therefore conducted a randomized, sham-controlled, phase II trial to evaluate whether five sessions of low-frequency rTMS can increase the magnitude and duration of these effects and whether this approach is safe.
                Fifteen patients with chronic stroke were randomized to receive active or sham rTMS of the unaffected hemisphere. A blinded rater assessed motor function and corticospinal excitability at baseline, during and after 2 weeks of treatment. Safety was assessed using a neuropsychologic battery and electroencephalogram.
                Active rTMS resulted in a significant improvement of the motor function performance in the affected hand that lasted for 2 weeks. These effects were not observed in the sham rTMS group (affected and unaffected hand) and in the unaffected hand in the active rTMS group. Corticospinal excitability decreased in the stimulated, unaffected hemisphere and increased in the affected hemisphere. There was a significant correlation between motor function improvement and corticospinal excitability change in the affected hemisphere. Cognitive performance and electroencephalogram were not changed significantly throughout the trial in both groups of treatment.
                These results support and extend the findings of previous studies on rTMS in stroke patients because five consecutive sessions of rTMS increased the magnitude and duration of the motor effects. Furthermore, this increased dose of rTMS is not associated with cognitive adverse effects and/or epileptogenic activity. IV methylprednisolone (IVMP) has been used to treat relapses in patients with relapsing-remitting (RR) MS, but its effect on disease progression is not known. Furthermore, there are no data on the impact of IVMP on T1 black holes or whole-brain atrophy.
                To determine the effect of IVMP on MRI measures of the destructive pathology in patients with RR-MS and secondarily to determine the effect of IVMP on disability progression in patients with RR-MS.
                The authors conducted a randomized, controlled, single-blind, phase II clinical trial of IVMP in patients with RR-MS. Eighty-eight patients with RR-MS with baseline Expanded Disability Status Scale (EDSS) scores of < or =5.5 were randomly assigned to regular pulses of IVMP (1 g/day for 5 days with an oral prednisone taper) or IVMP at the same dose schedule only for relapses (IVMP for relapses) and followed without other disease-modifying drug therapy for 5 years. Pulsed IVMP was given every 4 months for 3 years and then every 6 months for the subsequent 2 years. Patients had quantitative cranial MRI scans at study entry and after 5 years and standardized clinical assessments every 4 to 6 months.
                Eighty-one of 88 patients completed the trial as planned, and treatment was well tolerated. Baseline demographic, clinical, and MRI measures were well matched in the two study arms. Patients on the pulsed IVMP arm received more MP than patients on the control arm of the study (p < 0.0001). Mean change in T1 black hole volume favored pulsed IVMP therapy (+1.3 vs +5.2 mL; p < 0.0001), as did mean change in brain parenchymal volume (+2.6 vs -74.5 mL; p = 0.003). There was no significant difference between treatment arms in the change in T2 volume or annual relapse rate during the study. However, there was significantly more EDSS score worsening in the control group, receiving IVMP only for relapses. There was a 32.2% reduction (p </= 0.0001) in the probability of sustained EDSS score worsening in the pulsed MP arm compared with the relapse treatment arm. At the end of the study, EDSS was better in the pulsed MP group (1.7 vs 3.4; p < 0.0001). Prolonged treatment with pulsed IVMP was safe and well tolerated; only two patients dropped out for toxic side effects over 5 years.
                In patients with RR-MS, treatment with pulses of IVMP slows development of T1 black holes, prevents or delays whole-brain atrophy, and prevents or delays disability progression. A phase III study of IVMP pulses is warranted.
Although one trial did not contribute to efficacy results due to its duration, we found robust evidence in favour of a reduction in relapses and disability at 2 years in RRMS patients treated with NTZ. The drug was well tolerated. There are current significant safety concerns due to reporting of an increasing number of PML cases in patients treated with NTZ. This review was unable to provide an up-to-date systematic assessment of the risk due to the maximum 2 year-duration of the trials included. An independent systematic review of the safety profile of NTZ is warranted. NTZ should be used only by skilled neurologists in MS centres under surveillance programs.
All the data in this review came from trials supported by the Pharmaceutical Industry. In agreement with the Cochrane Collaboration policy, this may be considered a potential source of bias.