Phase 3 Study of Dexpramipexole in ALS (EMPOWER)

This study has been completed.
Information provided by (Responsible Party):
Knopp Biosciences Identifier:
First received: January 20, 2011
Last updated: November 24, 2014
Last verified: November 2014
The purpose of this study is to determine whether dexpramipexole (150 mg twice daily) is safe and effective in the treatment of Amyotrophic Lateral Sclerosis (ALS).

Condition Intervention Phase
Amyotrophic Lateral Sclerosis
Drug: Dexpramipexole
Drug: Placebo
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Randomized, Double-Blind, Placebo-Controlled, Multi-Center Study of the Safety and Efficacy of Dexpramipexole in Subjects With Amyotrophic Lateral Sclerosis

Resource links provided by NLM:

Further study details as provided by Knopp Biosciences:

Primary Outcome Measures:
  • A joint rank of functional outcomes adjusted for mortality. [ Time Frame: 12 months ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Time to death or respiratory insufficiency [ Time Frame: 18 months ] [ Designated as safety issue: No ]
  • Time to death [ Time Frame: 18 months ] [ Designated as safety issue: No ]
  • Respiratory decline: time to reach less than or equal to 50% of predicted upright slow vital capacity (SVC) or death [ Time Frame: 18 months ] [ Designated as safety issue: No ]
  • Change in muscle strength measurements (MSM), as determined by the overall megascore for hand-held dynamometry (HHD) [ Time Frame: 12 months ] [ Designated as safety issue: No ]
  • Change in ALS-related health quality, as measured by change in the total score on the Amyotrophic Lateral Sclerosis Assessment Questionnaire-5-Item Form (ALSAQ-5) [ Time Frame: 12 months ] [ Designated as safety issue: No ]
  • Population pharmacokinetics. [ Time Frame: 18 months ] [ Designated as safety issue: No ]
  • Incidence of adverse events, serious adverse events. [ Time Frame: 18 Months ] [ Designated as safety issue: Yes ]

Enrollment: 943
Study Start Date: March 2011
Study Completion Date: November 2012
Primary Completion Date: November 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Dexpramipexole Drug: Dexpramipexole
Oral tablet 150mg twice daily for up to 18 months.
Other Name: BIIB050
Placebo Comparator: Placebo Drug: Placebo
Oral tablet twice daily for up to 18 months.

Detailed Description:
Amyotrophic Lateral Sclerosis (ALS) is a rapidly progressive, degenerative disease of motor neurons in the brain and spinal cord that leads to muscle atrophy and spasticity in limb and bulbar muscles resulting in weakness and loss of ambulation, oropharyngeal dysfunction, weight loss, and ultimately respiratory failure. The purpose of this study is to determine whether dexpramipexole (150 mg twice daily) is safe and effective in the treatment of ALS.

Ages Eligible for Study:   18 Years to 80 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Aged 18 to 80 years old, inclusive, on Day 1.
  • Diagnosis of sporadic or familial ALS.
  • Onset of first ALS symptoms within 24 months prior to Day 1.
  • World Federation of Neurology El Escorial criteria are met for a possible, laboratory-supported probable, probable, or definite ALS diagnosis.
  • Upright slow vital capacity (SVC) of 65% or more at screening.
  • Patients taking or not taking Riluzole are eligible for this study: if a patient has never taken Riluzole, he or she is eligible; if a patient is currently taking Riluzole, he or she must have been on a stable dose for at least 60 days; if a patient has discontinued Riluzole, he or she must have stopped taking it for at least 30 days.
  • Must be able to swallow tablets at the time of study entry.

Exclusion Criteria:

  • Other medically significant illness.
  • Clinically significant abnormal laboratory values.
  • Pregnant women or women breastfeeding.
  • Prior exposure to dexpramipexole.
  • Currently taking pramipexole or other dopamine agonists.

Other protocol-defined inclusion/exclusion criteria may apply.

  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 identifier: NCT01281189

  Show 82 Study Locations
Sponsors and Collaborators
Knopp Biosciences
  More Information

Responsible Party: Knopp Biosciences Identifier: NCT01281189     History of Changes
Other Study ID Numbers: 223AS302  EUDRA CT NO: 2010-022818-19 
Study First Received: January 20, 2011
Last Updated: November 24, 2014
Health Authority: United States: Food and Drug Administration
Belgium: Federal Agency for Medicinal Products and Health Products
France: Agency for the Safety of drug and health products
Australia: Therapeutic Goods Administration (TGA)
Spain: Spanish Agency for Medicines and Health Products
Netherlands: The Central Committee on Research Involving Human Subjects (CCMO)
Ireland: Irish Medicines Board
Sweden: Medical Products Agency
Germany: Federal Institute for Drugs and Medical Devices
Canada: Health Canada
United Kingdom: Medicines and Healthcare Products Regulatory Agency

Keywords provided by Knopp Biosciences:
Amyotrophic Lateral Sclerosis
Motor Neurone Disease

Additional relevant MeSH terms:
Amyotrophic Lateral Sclerosis
Motor Neuron Disease
Central Nervous System Diseases
Metabolic Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neuromuscular Diseases
Pathologic Processes
Proteostasis Deficiencies
Spinal Cord Diseases
TDP-43 Proteinopathies
Anti-Dyskinesia Agents
Antiparkinson Agents
Dopamine Agents
Dopamine Agonists
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Physiological Effects of Drugs
Protective Agents processed this record on May 23, 2016