Open-label Extension to Protocol 1042-0500

Phase 2TerminatedNCT00442104

Marinus Pharmaceuticals54 enrolled

Overview

To allow open-label extension to patients who have completed Protocol 1042-0500

Patient should have completed all scheduled clinical study visits in the double blind, controlled trial (Protocol 1042-0500) and have been deemed eligible (had a response to treatment) by the Investigator. Male or female, with a diagnosis of IS with a video EEG (vEEG) recording confirming the diagnosis. There will be a total of 14 visits over 99(+or-1)week. A 24-hr vEEG is only required if the subject has been spasm-free for more than 24-hrs.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Infantile Spasms

Interventions

GanaxoloneDRUG

Eligibility

Sex: ALLMin age: 4 MonthsMax age: 24 Months

Medical Language ↔ Plain English

Inclusion Criteria: * Have completed all scheduled clinical study visits in the previous Protocol 1042 0500 and have been deemed eligible (no SAEs thought to be drug related and had a response to treatment) by the Investigator. * Be diagnosed with IS regardless of etiology. Diagnostic Criteria: Seizures consisting of single or repetitive short muscular contractions leading to flexion or extension. Spasms may be characterized as tonic or myoclonic contractions, may occur singly or in clusters, and typically occur bilaterally and symmetrically. The EEG pattern must be consistent with the diagnosis of IS (hypsarrhythmia, modified hypsarrhythmia, multifocal spike wave discharges, etc). * Have a 24 hour vEEG recording confirming the diagnosis of IS. * Have had a magnetic resonance imaging (MRI) performed to determine any possible causes of IS. * Have been previously treated with 3 AEDs or fewer. * Have a parent/guardian who is properly informed of the nature and potential risks and benefits of the clinical study, is willing and capable of complying with all clinical study procedures, and has given informed consent in writing prior to entering the clinical study. Exclusion Criteria: * Current treatment with more than 2 concomitant AEDs. * Have an active CNS infection, demyelinating disease, degenerative neurological disease, or CNS disease deemed progressive (with the exception of tuberous sclerosis) as evaluated by brain MRI. * Have any disease or condition (medical or surgical) at Screening that might compromise the hematologic, cardiovascular, pulmonary, renal, GI, or hepatic systems; or other conditions that might interfere with the absorption, distribution, metabolism, or excretion of the investigational product, or would place the subject at increased risk. * Aspartate transaminase (AST), alanine transaminase (ALT), or total bilirubin greater than 4 times the upper limit of laboratory normal or any clinical laboratory value deemed clinically significant by the Investigator. * History of recurrent status epilepticus. * Have been exposed to any other investigational drug within 30 days prior to enrollment.

Locations (14)

Children's Hospital of Los Angeles

Los Angeles, California, United States

Mattel Children's Hospital at UCLA

Los Angeles, California, United States

Outcomes

Primary Outcomes

Percentage of Participants Who Were Free of Spasms

Clinical spasms were determined by video-electroencephalography (VEEG). The number of participants with spasm-free duration have been presented.

Time frame: Weeks 4 through Week 96

Secondary Outcomes

Change From Baseline in Frequency of Spasm Clusters

Infantile spasms that come one after another in a cluster and lasts several minutes are called Spasm Clusters. Spasm clusters were determined by a 24-hour video-electroencephalography (vEEG). Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Baseline was defined as the Day 0 assessment prior to ganaxolone dosing in Protocol 1042-0500.

Time frame: Baseline and Week 4 through Week 32

Change From Baseline in Frequency of Individual Spasm

Individual Spasm are seizures that may last only a second or two and were determined by a 24-hour video-electroencephalography (vEEG). Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Baseline was defined as the Day 0 assessment prior to ganaxolone dosing in Protocol 1042-0500.

Time frame: Baseline and Week 4 through Week 32

Number of Participants With Change in Clinical Status on Caregiver's Global Assessment

Caregiver global assessment of seizure severity and response to treatment rated the participants' based on 7 clinical factors: seizure frequency, duration, and intensity; adverse experiences; social, intellectual, and motor functioning. Using a 7-point scale (\[1\] marked improvement, \[2\] moderate improvement, \[3\] slight improvement, \[4\] no change from baseline, \[5\] slight worsening, \[6\] moderate worsening, or \[7\] marked worsening). Higher score indicated worse symptoms. The assessment compared the participants' current status to their condition prior to initiating study medication.

Time frame: Week 4 through Week 32

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.

Children's National Medical Center

Washington D.C., District of Columbia, United States

Miami Children's Hospital, The Brain Institute

Miami, Florida, United States

Child Neurology Center of Nrothwest Florida, P.A.

Pensacola, Florida, United States

University of Chicago Comer Children's Hospital

Chicago, Illinois, United States

Minnesota Epilepsy Group, P.A.

Saint Paul, Minnesota, United States

Montefiore Medical Center- Albert Einstein College of Medicine

The Bronx, New York, United States

Le Bonheur Children's Medical Center

Memphis, Tennessee, United States

Dallas Pediatric Neurology Associates

Dallas, Texas, United States

...and 4 more locations

Number of Participants With Change in Clinical Status on the Investigator's Global Assessment

The investigators rated the participants' overall clinical status based on 7 clinical factors: seizure frequency, duration, and intensity; adverse experiences; social, intellectual, and motor functioning. Using a 7-point scale (\[1\] marked improvement, \[2\] moderate improvement, \[3\] slight improvement, \[4\] no change from baseline, \[5\] slight worsening, \[6\] moderate worsening, or \[7\] marked worsening). Higher score indicated worse symptoms. The investigators assessed the participants' status compared to their condition prior to initiating study medication.

Time frame: Week 4 through Week 32

Number of Participants With Spasm-free Durations

Spasm-free duration is defined as total number of spasm-free days recorded in the spasm/seizure diary. Parents/Guardians or nursing staff maintained a spasm/seizure diary to record the number and type of seizures each day, including spasms, throughout the entire study. The number of participants with spasm-free duration of at least 24 hours have been presented.

Time frame: Week 4 through Week 32

Number of Participants With Absence of Spasms

Absence of spasms is defined as percentage of total spasm-free days during a visit period=100%. Parents/Guardians or nursing staff maintained a spasm/seizure diary to record the number and type of seizures each day, including spasms, throughout the entire study. The participants achieving absence of spasms have been presented.

Time frame: Week 4 through Week 32

Developmental Assessment Using Denver-II Developmental Test

Denver-II Developmental Test measures a child's development in several areas:Personal-Social,Fine Motor-Adaptive,Language,and Gross Motor,from birth to 6 years old.It consists of 125 items that are organized into subscales and scored as pass,fail,or refused.To evaluate a child's progress,test compares their performance to a normative sample of children of same age.For each item,age at which 90% of children in normative sample pass it is determined.Derived score for each subscale is sum of item scores and represents difference between child's chronological age and age at which 90% of children in normative sample pass the items in that subscale.A higher derived score on a subscale indicates better performance on items in that subscale relative to other children of same age who have taken the test.Among subscales,Personal-Social subscale ranges from -16 months to 24 months;others range from - 12 months to 24 months.All subscales have a population mean of 0 and a standard deviation of 3.

Time frame: Week 8 through Week 32

Percentage of Total Spasm-free Days and Cumulative Spasm-free Days as Determined From the Seizure Diary.

Percentage of total spasm-free days during a visit period is defined as total number of spasm free days as recorded in the Seizure Diary/ total number of days during that period, multiplied by 100. Percentage of cumulative total spasm-free days during a visit period is defined as sum of total number of spasm-free days during this period as recorded in the Seizure Diary/ total number of days in the treatment period, multiplied by 100.

Time frame: Weeks 4 through Week 32