A Study of the Effects of JNJ-26489112 on the Photic Induced Paroxysmal Electroencephalogram (EEG) Response in Patients With Photosensitive Epilepsy
The purpose of this study is to check the Effects of JNJ-26489112 on the Photic Induced Paroxysmal electroencephalogram (EEG) Response in Patients with Photosensitive Epilepsy.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Single Blind (Subject)
Primary Purpose: Treatment
|Official Title:||A Study of the Effects of JNJ-26489112 on the Photic Induced Paroxysmal Electroencephalogram Response in Patients With Photosensitive Epilepsy|
- The photosensitivity range in each eye condition (during closure, closed, open) based upon the photoparoxysmal electroencepholgram (EEG) response to intermittent photic stimulation (IPS). [ Time Frame: Hours 1 to 8 (Day 2) and 25 to 33 postdose (Day 3) with optional assessments at 48, 52, and 56 hours postdose ] [ Designated as safety issue: No ]
- The safety, tolerability, pharmacokinetics and pharmacokinetic/pharmacodynamic relationship of JNJ-26489112. [ Time Frame: Day 1 to Day 3 and an optional Day 4 ] [ Designated as safety issue: No ]
|Study Start Date:||October 2007|
|Study Completion Date:||July 2008|
|Primary Completion Date:||July 2008 (Final data collection date for primary outcome measure)|
Single oral dose of JNJ-26489112 up to 3000 mg on Day 2.Drug: Placebo
Single dose of placebo on Day 1, and a second single dose of placebo on Day 3.
This is a multicenter, non-randomized (participants are assigned deliberately), single-blind (patients do not know which treatment they are receiving), within patient placebo-controlled study. Up to 32 male or female patients will participate in this study. The duration of subject participation is approximately 6 weeks.
Patients will receive the oral doses of study drug in the mornings of Days 1, 2, and 3. All patients will receive a single dose of placebo on Day 1, a single dose of JNJ-26489112 on Day 2, and a second single dose of placebo on Day 3. Blood samples will be taken for evaluation of JNJ-26489112 drug concentrations in plasma and blood. Blood samples will also be collected for laboratory safety assessments and measurement of antiepileptic drug concentrations. Further safety will be assessed by the reporting of adverse events, vital signs, 12-lead ECG, physical and neurological examinations. Patients will be discharged on the evening of Day 3 after the pharmacokinetic samples have been collected, and after assessment by the investigator, unless there are any ongoing adverse events which require in-house monitoring. EEG tracings, recorded during intermittent photic stimulation sessions, will be digitally recorded on a CD-ROM, coded and evaluated independently by one blinded clinical expert to determine the effects on the photosensitivity range. If complete suppression of photosensitivity or reduction of the photosensitivity range by at least 3 points on the photosensitivity scale in at least one eye condition (during closure, closed, open) is not observed in at least 3 of the 4 patients and a maximum tolerated dose has been reached, the study will be stopped. If reduction of the photosensitivity range by at least 3 points on the photosensitivity scale in at least one eye condition (during closure, closed, open) is observed in at least 3 of the 4 patients (with complete suppression in at least 2 patients) in the first cohort, the dose level of JNJ-26489112 may be reduced in subsequent cohorts until the reduction or suppression of photosensitivity is seen in fewer than 2 out of 4 patients in one cohort. Once an effective dose has been reached an additional open-label cohort may be enrolled in which no study drug (JNJ-26489112 or placebo) will be administered to patients. Study drug (i.e., JNJ-26489112 or placebo) will be administered orally as single doses on Days 1 to 3. Placebo will be administered on Days 1 and 3, and a single dose of JNJ-26489112 will be administered on Day 2.
|Study Director:||Johnson & Johnson Pharmaceutical Research & Development, L.L.C. Clinical Trial||Johnson & Johnson Pharmaceutical Research & Development, L.L.C.|