Assessment of Ocrelizumab (OCR) Treatment Effects on Functional Impairment of MS Patients Enrolled in the Phase III Orchestra Programme Using Multimodal Evoked Potentials (EP) and Highresolution Electroencephalography (EEG)

Study Overview
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Brief Summary
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Multiple Sclerosis (MS) is not only an 'inflammatory' demyelinating disease, but also includes axonal and neuronal injury in the grey matter . Neurodegenerative processes are partly independent of lesion formation and relapse activity , but represent the direct driver of clinical long-term disability and cognitive decline. Multimodal evoked potentials (EP), i.e. the combination of visual, somato-sensory and motor EP (VEP, SSEP, MEP) have been shown prospectively to provide objective, monovectorial, and numerical data which are closely correlated to the EDSS. As EP capture the functional integrity of the examined systems they represent a method unbiased for directional changes, while remaining specific for the neuronal function, and hence can measure deterioration, as well as improvement, a germane advantage to capture drug response. High-resolution electroencephalography (EEG) allow for explorative analysis of potential surrogate markers for cognitive decline. Ocrelizumab (OCR), a humanized anti-CD20 monoclonal antibody has shown strong treatment effects on number of T1Gd-enhancing lesions , on new T1Gd-enhancing and new T2-hyperintense lesions as well as on the annualized relapse rate in a recent phase II trial in relapsing-remitting MS. The present study will investigate the effects of OCR on multimodal evoked potentials (EP), Furthermore, quantitative EEG as a potential correlate of cognitive dysfunction and fatigue will be explored.

Official Title
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Assessment of Ocrelizumab (OCR) Treatment Effects on Functional Impairment of MS Patients Enrolled in the Phase III Orchestra Programme Using Multimodal Evoked Potentials (EP) and Highresolution Electroencephalography (EEG)

Conditions
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Multiple Sclerosis

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: definitive inclusion in one of the phase III trials on OCR: relapsing remitting multiple sclerosis (RRMS) patients in Opera I (WA21092B) or Opera II (WA21093), primary progressive multiple sclerosis (PPMS) patients in Oratorio (WA25046B) and fulfilling the respective inclusion criteria stable clinical state (at least 4 weeks after treatment with corticoids, when there was a relapse) Provision of written informed consent and ability to be compliant with the schedule of assessments of the present study Exclusion Criteria: exclusion criteria of both phase III trials on OCR also apply to the present study additionally patients with movable metal implants, e.g. pace-maker, stents, deep brain stimulators are excluded; (patients with jaw- or bone-fixed metal implants can be included)

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| dΣ-EP | The primary outcome measure is the change in the sum score of multimodal EP (dΣ-EP) after two years, which will be compared between treatment groups. | Baseline, 48 weeks, 96 weeks (RMS)/ Baseline, 48 weeks, 120 weeks (PPMS) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| d#-EP | Secondary outcome measures are the change in number of abnormal EP (d#-EP) as well as change in cognitive performance and fatigue at two years. | Baseline, 48 weeks, 96 weeks (RMS)/ Baseline, 48 weeks, 120 weeks (PPMS) |