Trial Outcomes & Findings for Raltegravir (Isentress) Pilot Study in Relapsing Multiple Sclerosis (NCT NCT01767701)

Patients 18-55 years of age with RRMS, as per McDonald Criteria 2010, EDSS up to 6.0, relapse within the past 12 months or at least one active Gd enhanced lesion on brain MRI within the 3 months prior to consent. All participants were recruited at the Clinical Research Centre of the Royal London Hospital and drawn from greater London.

31 subjects screened. 8 had no evidence of Gd enhancing lesions in their baseline MRI and were screen failed. Of the 23 participants who were recruited into the study 3 were withdrawn prior to starting the treatment phase; one at the request of the participant and the remaining two due to MS relapse.

Raltegravir (Isentress) Pilot Study in Relapsing Multiple Sclerosis

Demonstrate in subjects with relapsing remitting multiple sclerosis a reduction in the number of new or recurrent Gd-enhancing lesions that appear on brain T1-weighted MRI over the period of treatment with raltegravir, compared to baseline. Within patient change in number of lesions was calculated by subtracting the after treatment period (3 months) minus before treatment period (3 months).

Demonstrate a reduction in the cumulative number of new or enlarging T2 weighted lesions on brain MRI over the period of treatment with Raltegravir compared with baseline. Within-patient changes in lesion count calculated after-before.

Explore preliminary clinical responses in relapsing-remitting multiple sclerosis subjects treated with Raltegravir, compared with baseline as measured by Patient Reported Outcomes (Questionnaires). The MSFC is a composite score consisting of the standardly derived composite score from 9-hole peg test (9HPT), timed walk and PASAT scores. 9HPT is measured as timed speed to complete the task; higher scores indicate less disability. The 25-foot walk is measured as timed speed; higher scores indicate less disability. The Paced Auditory Serial Addition Test (PASAT) The PASAT is a measure of cognitive function that assesses auditory information processing speed and flexibility, as well as calculation ability. It is a timed speed test measured in seconds. In the PASAT a lower score indicates less disability.

The Kurtzke Expanded Disability Status Scale (EDSS) is a method of quantifying disability in multiple sclerosis. The scale has been developed by John F. Kurtzke. The EDSS quantifies disability in eight Functional Systems (FS) and allows neurologists to assign a Functional System Score (FSS) in each of these. 0 = Normal 1-1.5 = No disability, but some abnormal neurological signs 2-2.5 = Minimal disability 3-4.5 = Moderate disability, affecting daily activities, but you can still walk. A lower score indicates less disability. 5-8 = More severe disability, impairing your daily activities and requiring assistance with walking 8.5-9.5 = Very severe disability, restricting you to bed 10 = Death EDSS scores were measured monthly over 6 months and the mean of the measurements for the first three months (baseline) was recorded to use calculate the change from baseline compared with the mean of measurements taken monthly during the second three months (treatment).

This measure is the number of gadolinium-enhancing T1 lesions as determined by MRI taken on the monthly basis during the six months of the study.

This measure is the cumulative percentage of subjects who had scans free from Gd enhancing lesions during the first three months (baseline) compared with the second three months (treatment). These percentages are expressed as a total percentage for the baseline and for the treatment periods.

This outcome will be assessed by blood and urine sampling; collection of patient reported symptoms and neurological and physical exams. This measure is the total number of adverse events recorded for each type of event during the study period. The number of participants is 31 which is the number screened and enrolled in the study. Eleven participants did not meet the criterion for baseline i.e. having a gadolinium enhancing lesion on MRI at the baseline visit and therefore did not continue to the baseline observation period. The adverse events for the 11 participants who did not begin the study observation period were recorded during the screening period and added to the 20 participants who were studied during the 6 months of the study. Adverse events are recorded as total number during the study period. Each patient may have had more than one adverse event.

Measured by Human C-Reactive Protein (HCRP) which is a measure of general inflammation. The higher the value the more inflammatory response is present. The HCRP was measured monthly for six months. The mean value for the baseline three months was compared with the mean value taken for the second (treatment) three months.