Study to Evaluate the Safety of AT2220 (Duvoglustat) in Pompe Disease

• ClinicalTrials.gov Identifier: NCT00688597
• Recruitment Status: Terminated
• First Posted: June 3, 2008
• Results First Posted: August 17, 2018
• Last Update Posted: August 17, 2018
• Sponsor: Amicus Therapeutics
• Information provided by (Responsible Party): Amicus Therapeutics

Study Description

Brief Summary:

The main purpose of this study was to determine the safety and tolerability of 3 different doses of duvoglustat (AT2220) in participants affected by Pompe disease. The study also evaluated the effects of duvoglustat on functional parameters in Pompe disease.

Condition or disease	Intervention/treatment	Phase
Pompe Disease	Drug: Duvoglustat	Phase 2

Detailed Description:

This was a Phase 2, open-label study in participants with Pompe disease, a lysosomal storage disorder. Duvoglustat is designed to act as a pharmacological chaperone of alpha-glucosidase, in order to restore enzyme activity. This study consisted of a 28-day screening period, an 11-week treatment period, and a 1-week follow-up period. Three dosing regimens of oral duvoglustat were to be evaluated (Cohort 1: 2.5 g daily for 3 days, followed by no study drug for 4 days; Cohort 2: 5 g daily for 3 days, followed by no study drug for 4 days; Cohort 3: 5 g daily for 7 days, followed by no study drug for 7 days).

Participants meeting all eligibility criteria underwent physical examination, electrocardiogram, spirometry, muscular strength test, functional muscle test, 6-minute walk test (when appropriate), laboratory tests, magnetic resonance imaging, and muscle (needle) biopsy. Quality of life was assessed via the 36-Item Short Form Health Survey questionnaire. Functional ability and level of handicap was assessed by Rotterdam handicap scale.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 3 participants
• Allocation: Non-Randomized
• Intervention Model: Parallel Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: An Open-Label, Multicenter Study to Evaluate the Safety, Tolerability, Pharmacodynamics, and Pharmacokinetics of Three Dosing Regimens of Oral AT2220 in Patients With Pompe Disease
• Actual Study Start Date: December 8, 2008
• Actual Primary Completion Date: December 14, 2009
• Actual Study Completion Date: December 14, 2009

Arms and Interventions

Arm	Intervention/treatment
Experimental: Cohort 1; Regimen 1: Low-dose duvoglustat (2.5 grams [g]) once a day (QD) for 3 days, followed by no drug for 4 days, for 11 weeks.	Drug: Duvoglustat; Powder in a bottle for dissolution in water for oral administration; Other Names: Duvoglustat hydrochloride; 1-Deoxynojirimycin hydrochloride; AT2220
Experimental: Cohort 2; Regimen 1: High-dose duvoglustat (5.0 g) QD for 3 days, followed by no drug for 4 days, for 11 weeks.	Drug: Duvoglustat; Powder in a bottle for dissolution in water for oral administration; Other Names: Duvoglustat hydrochloride; 1-Deoxynojirimycin hydrochloride; AT2220
Experimental: Cohort 3; Regimen 2: High-dose duvoglustat (5.0 g) QD for 7 days, followed by no drug for 7 days, for 11 weeks.	Drug: Duvoglustat; Powder in a bottle for dissolution in water for oral administration; Other Names: Duvoglustat hydrochloride; 1-Deoxynojirimycin hydrochloride; AT2220

Outcome Measures

Primary Outcome Measures :

1. Proportion Of Participants Experiencing Severe Treatment-emergent Adverse Events (TEAEs) [ Time Frame: Baseline, Week 11 ]
   The number of participants experiencing severe TEAEs is presented for participants who received duvoglustat treatment in this open-label study. The duration of duvoglustat exposure for Cohort 1 ranged from 2 to 24 days, and their exposure ranged from a total of 7,500 to 32,500 milligrams of duvoglustat. An adverse event (AE) refers to any unfavorable and unintended sign, symptom, syndrome, or illness that develops or worsens during the period of observation in the clinical study. The following guideline was used to grade the intensity of an AE: mild, the AE is easily tolerated and does not interfere with daily activity; moderate, the AE interferes with the daily activity but the participant is still able to function; severe, the AE is incapacitating and requires medical intervention. A summary of serious and all other non-serious AEs regardless of causality is located in the Reported Adverse Events module.

Secondary Outcome Measures :

1. Change In 6-minute Walk Test (6MWT) From Baseline To End Of Study [ Time Frame: Baseline, Week 11 ]
   The 6MWT (American Thoracic Society standards) was evaluated in ambulatory participants at screening, baseline, and to the end of the study. It was a standardized test that measured the distance in meters (m) covered over a 6-minute walk. Reference equations used (for 6MWT distance in healthy adults) included: (height in centimeters [cm], weight in kilograms [kg]) 6MWT distance for men = [7.57 × height (cm)] - [5.02 × age] - [1.76 × weight (kg)] - 309 m; 6MWT distance for women = [2.11 × height (cm)] - [5.78 × age] - [2.29 × weight (kg)] + 667 m

Eligibility Criteria

• Ages Eligible for Study: 18 Years to 74 Years (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Male or female, 18 to 74 years of age inclusive
• Diagnosis of Pompe disease based on clinical assessment, enzyme assay, and/or genotyping. Confirmatory genotyping will be performed on all participants who are screened for the study
• Naïve to enzyme replacement therapy (ERT) or has not received ERT in the 3 months prior to screening
• Willing not to initiate ERT or other prohibited treatment during study participation
• Functional grade for arms and/or legs ≥2 OR sitting forced vital capacity ≥30% and <80% of predicted value, reproducible between screening and baseline (±15%)
• Participants of reproductive potential agree to use reliable methods of contraception during the study
• Participant or legal representative is willing and able to provide written informed consent

Exclusion Criteria:

• Any intercurrent condition that may preclude accurate interpretation of study data
• Obstructive pulmonary disease
• Invasive ventilatory support
• Use of noninvasive ventilatory support >8 hours/day while awake
• History of QTc prolongation >450 milliseconds (msec) for males and >470 msec for females
• History of allergy or sensitivity to the study drug, including any prior serious adverse reaction to iminosugars (such as miglustat or miglitol)
• Pregnancy or breast-feeding
• Current or recent drug or alcohol abuse
• Treatment with another investigational drug within 30 days of study start
• Use of prohibited medications ≤3 months prior to screening
• Otherwise unsuitable for the study in the opinion of the Investigator

Contacts and Locations

Locations

United States, Georgia

Decatur, Georgia, United States, 30033

Sponsors and Collaborators

Amicus Therapeutics

Investigators

• Study Director: Medical Monitor Clinical Research; Amicus Therapeutics

More Information

• Responsible Party: Amicus Therapeutics
• ClinicalTrials.gov Identifier: NCT00688597
• Other Study ID Numbers: POM-CL-201
• First Posted: June 3, 2008
• Results First Posted: August 17, 2018
• Last Update Posted: August 17, 2018
• Last Verified: July 2018

Keywords provided by Amicus Therapeutics:

Amicus Therapeutics; Duvoglustat; AT2220

Additional relevant MeSH terms:

Glycogen Storage Disease Type II; Lysosomal Storage Diseases, Nervous System; Brain Diseases, Metabolic, Inborn; Brain Diseases, Metabolic; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Metabolism, Inborn Errors; Genetic Diseases, Inborn; Glycogen Storage Disease; Carbohydrate Metabolism, Inborn Errors; Lysosomal Storage Diseases; Metabolic Diseases; 1-Deoxynojirimycin; Antiviral Agents; Anti-Infective Agents; Enzyme Inhibitors; Molecular Mechanisms of Pharmacological Action