期刊
MULTIPLE SCLEROSIS
卷 11, 期 3, 页码 286-295出版社
ARNOLD, HODDER HEADLINE PLC
DOI: 10.1191/1352458505ms1185oa
关键词
antiviral drugs; clinical trials; herpesvirus 6; human antivirals; multiple sclerosis (MS)
资金
- NCRR NIH HHS [M01-RR00102] Funding Source: Medline
Objective: The human Herpesvirus type-6 (HHV-6) has been implicated in multiple sclerosis (MS). Valacyclovir is an antiviral agent with an excellent safety profile. A two-year placebo-controlled, double-blind study was conducted to (1) ascertain if high-dose, prolonged treatment with valacyclovir would be safe and (2) observe if valacyclovir would delay the progression of MS clinically or by magnetic resonance imaging (MRI). Design/methods: Fifty-eight patients were stratified as to severity and randomly assigned to receive valacyclovir (3000 mg/day) or placebo for a period of two years. Patients were followed clinically over the two-year period by means of the Expanded Disability Status Scale (EDSS), the Ambulation Index (AI) and brain MRI scans. Patients underwent routine lab studies every three months. Patients continued on the medication for two years unless they had a sustained progression or repeated exacerbations. Results. No patient discontinued the study due to side effects or toxicity. In Relative Ranking of Progression, time to first attack, attack rate, and time to withdrawal there were trends (but not statistically significant) toward drug effect over placebo in the Severe clinical category. MRI evaluation showed no significant drug effect. Conclusions: Although not statistically significant, positive trends were detected for acyclovir by clinical measures, but not by MRI.
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