A Study of the Safety, Tolerability & Efficacy of Long-term Administration of Drisapersen in US & Canadian Subjects

This study is currently recruiting participants. (see Contacts and Locations)
Verified October 2014 by Prosensa Therapeutics
Sponsor:
Information provided by (Responsible Party):
Prosensa Therapeutics
ClinicalTrials.gov Identifier:
NCT01803412
First received: February 28, 2013
Last updated: October 13, 2014
Last verified: October 2014
  Purpose

This is a phase III, multicenter, open-label, uncontrolled extension study in male subjects with DMD open to eligible US and Canadian subjects who previously participated in the following studies of drisapersen: DMD114876, DMD114044 and DMD114349. Subjects will receive 6mg/kg drisapersen on a weekly basis. For subjects who have previously experienced significant safety or tolerability issues or who experience these during the study, there is the potential of an alternate intermittent dosing arm that will be given as a regimen of 6 mg/kg weekly for 8 weeks followed by 4 weeks off treatment.


Condition Intervention Phase
Muscular Dystrophies
Drug: Drisapersen
Phase 3

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open-label Extension Study of the Long-term Safety, Tolerability and Efficacy of Drisapersen in US and Canadian Subjects With Duchenne Muscular Dystrophy.

Resource links provided by NLM:


Further study details as provided by Prosensa Therapeutics:

Primary Outcome Measures:
  • Incidence and severity of Adverse Events (AEs) [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    AEs will be assessed from Pre-baseline visit until 20 weeks after the subject has either completed the study or withdrawn from treatment early. AEs are any untoward medical occurrence in a patient or clinical investigation subject, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product

  • Systolic and diastolic blood pressure measurements to assess the safety and tolerability [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
  • Pulse rate and respiratory rate measurements to assess the safety and tolerability [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
  • Body temperature measurements to assess the safety and tolerability [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
  • 12-Lead Electrocardiogram (ECG) measurements to assess the safety and tolerability [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    The following parameters will be assessed: heart rate, intervals, corrected QT (QTc) interval (Bazett). In addition, an assessment of abnormal morphology will be made

  • Echocardiogram measurements to assess the safety and tolerability [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    The following parameters will be assessed: Left ventricular end-diastolic/end-systolic wall thickness (septum, posterior wall), fractional shortening (SF) and ejection fraction (LVEF) will be derived from M-mode (from the parasternal long-axis or short-axis view) for quantitative measurements

  • Laboratory tests to assess the safety and tolerability [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    Laboratory tests will include hematology, biochemistry and urinalysis parameters


Secondary Outcome Measures:
  • Muscle function assessment using 6-minute walking distance (6MWD) test [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    Subjects will be asked to walk, at their own preferred speed, up and down a fixed distance until they are told to stop after 6 minutes. The subjects are warned of the time and are told that they may stop earlier if they feel unable to continue. The total distance walked within 6 minutes (or until the subject stopped in case of early termination of the test) will be recorded in meters, as well as any falls. Subjects who became non-ambulant in the prior study or who become non-ambulant during this study will not be able to perform this

  • North Star Ambulatory Assessment (NSAA) [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    The NSAA is a functional scale devised from the Hammersmith Scale of Motor Ability specifically for use in ambulant children with DMD. It consists of 17 activities graded 0 (unable to perform), 1 (performs with modifications), 2 (normal movement). The scale assesses activities that are required for ambulatory activity and includes items that are rarely achieved in untreated DMD (jump, hop, raise head) as well as items that are known to progressively deteriorate over time (stand from a chair, walk)

  • Pulmonary function assessment [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    Non-invasive spirometry will be conducted to determine actual and percent values for Forced Vital Capacity (FVC) and Forced Expiratory Volume (FEV1)

  • Time to major disease milestones [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    Major disease milestones are defined as those events that occurred since the last time they were assessed and include the following muscular dystrophy-related milestones: Achilles tendon contracture, hamstring contracture, lumbar lordosis, limb skeletal deformity, loss of ambulation, respiratory support during the day, respiratory support during sleep, scoliosis, use of leg braces, use of orthoses, use of special shoes, using Gower's maneuver or other milestone (to be specified)

  • Functional Outcomes assessment [ Time Frame: Up to 48 weeks ] [ Designated as safety issue: No ]
    One assessments will be completed to observe the changes in the ability of the subject to perform usual day-to-day activities during the study: Functional Outcomes Survey - by the family/caregivers who attends the scheduled clinic visit.


Estimated Enrollment: 67
Study Start Date: May 2013
Estimated Study Completion Date: April 2016
Estimated Primary Completion Date: April 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Primary Continuous Dosing Arm
Subjects will receive drisapersen 6 mg/kg as SC injection(s) once a week, continuously throughout their duration of participation
Drug: Drisapersen
Drisapersen will be supplied as 3 mL (milliliter) vials containing 1 mL sterile solution of 200 mg/mL strength. Each subject will receive drisapersen 6 mg/kg administered SC once a week, either continuously or intermittently (for 8 weeks, followed by 4 weeks of no dosing) throughout their duration of participation
Experimental: Alternate Intermittent Dosing Arm
Subjects will receive drisapersen intermittently, as a regimen of 6 mg/kg as SC injection(s) once a week for 8 weeks followed by 4 weeks of no dosing, throughout their duration of participation
Drug: Drisapersen
Drisapersen will be supplied as 3 mL (milliliter) vials containing 1 mL sterile solution of 200 mg/mL strength. Each subject will receive drisapersen 6 mg/kg administered SC once a week, either continuously or intermittently (for 8 weeks, followed by 4 weeks of no dosing) throughout their duration of participation

Detailed Description:

In Part A of the study (DMD115501, original protocol), 21 subjects entered the study at 3 US sites and completed up to 14 weeks of treatment, and up to 22 weeks of follow-up. This protocol amendment, Part B of the study will include up to 13 more US and Canadian centers, and up to 51 more subjects. In total the study will enroll approximately 72 subjects. All subjects will commence Part B at screening and follow the study schedule.

The primary dosing arm is drisapersen 6 mg/kg as SC injection(s) once a week. For subjects who have previously experienced significant safety or tolerability issues or who experience these during the study, there is the potential of an alternate intermittent dosing arm that will be given as a regimen of 6 mg/kg/wk for 8 weeks followed by 4 weeks off treatment.

This study does not have a minimum duration of participation. Subjects will have varying times of study participation depending on when they enter from one of the eligible studies, and will be permitted to continue in this study until such a time that they withdraw based on protocol-defined criteria, or Prosensa stops the study.

  Eligibility

Ages Eligible for Study:   5 Years and older
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Participation in an eligible drisapersen study as follows:

(A) Prior DMD114876 subjects: Subjects who completed both the 24 week double-blind treatment and 24 week post-treatment phases in study DMD114876 OR Subjects who withdrew from the treatment portion of study DMD114876 due to meeting laboratory safety stopping criteria may be eligible to enrol in the extension study if: the laboratory parameters that led to stopping have resolved; the principal investigator (PI) considers the benefit of further treatment with drisapersen outweighs the risk to the individual subject; and following consultation with the Medical Monitor (B) Prior DMD114044 Subjects: US subjects who completed study DMD114044 in another country and who want to return to the US to participate in study DMD115501, upon agreement by a DMD115501 Investigator OR US citizens who participated in DMD114044 but who had to withdraw from the study due to meeting laboratory safety stopping criteria may be eligible to enrol in DMD115501 if: the laboratory parameters that led to stopping have resolved; the PI considers the benefit of further treatment with drisapersen outweighs the risk to the individual subject; and following consultation with the Medical Monitor and upon agreement by a DMD115501 investigator (C) Prior DMD114349 Subjects: US subjects who participated in and completed study DMD114044 in another country and who entered into the ongoing open-label extension study DMD114349 in a country outside the US who wish to withdraw from DMD114349 and return to the US to participate in study DMD115501, upon agreement by a DMD115501 investigator.

Canadian subjects who participated in the DMD114349 study OR Canadian subjects who withdrew from the treatment portion of the study DMD114349 due to meeting laboratory safety stopping criteria may be eligible to enroll in the extension study if the laboratory parameters that led to stopping have resolved; the PI considers the benefit of further treatment with drisapersen outweighs the risk to the individual subject; and following consultation with the Medical Monitor.

  • Continued use of glucocorticoids for a minimum of 60 days prior to study entry with a reasonable expectation that the subject will remain on steroids for the duration of the study. Changes to or cessation of glucocorticoids will be at the discretion of the PI in consultation with the subject/parent and the Medical Monitor. If subject is not on steroids, involvement in the study needs to be discussed with the medical monitor.
  • Willing and able to comply with all protocol requirements and procedures (with the exception of those assessments requiring a subject to be ambulant, for those subjects who have lost ambulation)
  • Able to give informed assent and/or consent in writing signed by the subject and/or parent(s)/legal guardian (according to local regulations)

Exclusion Criteria:

  • Subject had a serious adverse experience or who met safety stopping criteria that remains unresolved from studies DMD114876, DMD114044, or DMD114349, which in the opinion of the investigator could have been attributable to study medication, and which is ongoing. Once resolved, subject may be eligible to enrol following PI consultation with the Medical Monitor
  • Use of anticoagulants, antithrombotics or antiplatelet agents, or previous treatment with investigational drugs except for drisapersen, within 28 days of the first administration of study medication
  • Participation in any other investigational clinical trial within 3 months prior to the start of screening, or during this clinical study. If subject has participated in any other study within 6 months, this should be discussed with the medical monitor prior to study entry.
  • History of significant medical disorder which may confound the interpretation of either efficacy or safety data (e.g. current or history of renal or liver disease/impairment, history of inflammatory illness)
  • Symptomatic cardiomyopathy. If subject has a left ventricular ejection fraction <45% at Screening, the investigator should discuss inclusion of subject in the study with the medical monitor
  • A platelet count under the lower limit of normal at screening. A re-test within the screening period is permissible and if within normal range the subject may enter the study.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01803412

Contacts
Contact: Claire Leyten +31713322100 patientinfo@prosensa.nl

Locations
United States, California
UC Davis Medical Center Not yet recruiting
Sacramento, California, United States, 95817
Contact: Candace Aguilar    916-734-8898    candace.aguilar@ucdmc.ucdavis.edu   
Principal Investigator: Craig McDonald, MD         
United States, Florida
Northwest Florida Clinical Research Group Not yet recruiting
Gulf Breeze, Florida, United States, 32561
Contact: Genei Bougher    850-934-1299    genei.bougher@cneurology.com   
Principal Investigator: James B Renfroe, MD         
United States, Iowa
University of Iowa Not yet recruiting
Iowa City, Iowa, United States, 52242
Contact: Carrie Stephan    319-356-2673    carrie-stephan@uiowa.edu   
Principal Investigator: Katherine D Mathews, MD         
United States, Maryland
Kennedy Krieger Institute Not yet recruiting
Baltimore, Maryland, United States, 21205
Contact: Genila Bibat    443-923-2697    bibat@kennedykrieger.org   
Principal Investigator: Kathryn R Wagner, MD         
United States, Minnesota
University of Minnesota Not yet recruiting
Minneapolis, Minnesota, United States, 55455
Contact: Gina Chambers    612-625-4882    gchamber@umn.edu   
Principal Investigator: Peter I Karachunski, MD         
United States, New York
Columbia University Medical Center Not yet recruiting
New York, New York, United States, 10032
Contact: Jonathan Marra    212-305-2461    jdm2132@columbia.edu   
Principal Investigator: Jacinda Sampson, MD         
United States, North Carolina
Duke University Medical Center Not yet recruiting
Durham, North Carolina, United States, 27710
Contact: Karen Cornett       k.cornett@duke.edu   
Principal Investigator: Edward C Smith, MD         
United States, Ohio
Cincinnati Children's Hospital Medical Center Recruiting
Cincinnati, Ohio, United States, 45229
Contact: Paula Morehart    513-636-8967    Paula.Morehart@cchmc.org   
Principal Investigator: Brenda Wong, MD         
Nationwide Children's Hospital Recruiting
Columbus, Ohio, United States, 43205
Contact: Lauren Bird    614-722-2699    Lauren.Bird@nationwidechildrens.org   
Principal Investigator: Kevin Flanigan, MD         
United States, Oregon
Shriners Hospitals For Children Not yet recruiting
Portland, Oregon, United States, 97239
Contact: Cathleen Buckon    503-221-3471    cbuckon@shrinenet.org   
Principal Investigator: Finanger Erika, MD         
United States, Texas
Children's Medical Center Dallas Not yet recruiting
Dallas, Texas, United States, 75207
Contact: Margaret Cowie    214-456-1865    MARGARET.COWIE@childrens.com   
Principal Investigator: Susan T Iannaccone, MD         
Canada, British Columbia
Children's & Women's Health Centre of BC Not yet recruiting
Vancouver, British Columbia, Canada, V6H 3V4
Contact: Nela Matric    (604) 875-2345 ext 6549    nmartic3@cw.bc.ca   
Principal Investigator: Kathryn Selby, MD         
Canada, Quebec
CHU Ste-Justine Not yet recruiting
Montreal, Quebec, Canada, H3T 1C5
Contact: Christine Massicotte    (514) 345-4931 ext 3209    christine.massicotte@recherche-ste-justine.qc.ca   
Principal Investigator: Guy D'Anjou, MD         
Canada
Children's Hospital London Health Sciences Centre Not yet recruiting
Ontario, Canada, N6A 4G5
Contact: Sharan Goobie, MD    (519) 685-8500 ext 58140    sharan.goobie@lhsc.on.ca   
Principal Investigator: Craig Campbell, MD         
Sponsors and Collaborators
Prosensa Therapeutics
Investigators
Study Director: Prosensa Clinical Trials Prosensa Therapeutics
  More Information

No publications provided

Responsible Party: Prosensa Therapeutics
ClinicalTrials.gov Identifier: NCT01803412     History of Changes
Other Study ID Numbers: DMD115501
Study First Received: February 28, 2013
Last Updated: October 13, 2014
Health Authority: United States: Food and Drug Administration

Keywords provided by Prosensa Therapeutics:
GSK2402968
open-label extension
safety
drisapersen
Duchenne Muscular Dystrophy
tolerability
Quality of Life

Additional relevant MeSH terms:
Muscular Dystrophies
Muscular Dystrophy, Duchenne
Muscular Disorders, Atrophic
Muscular Diseases
Musculoskeletal Diseases
Neuromuscular Diseases
Nervous System Diseases
Genetic Diseases, Inborn
Genetic Diseases, X-Linked

ClinicalTrials.gov processed this record on October 19, 2014