Exercise Training in Barth Syndrome

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
W. Todd Cade, Washington University School of Medicine
ClinicalTrials.gov Identifier:
NCT01194141
First received: August 30, 2010
Last updated: December 18, 2013
Last verified: December 2013
  Purpose

Barth syndrome (BTHS) is a genetic disease that results in heart failure, muscle weakness and exercise intolerance. Several studies in non-BTHS heart failure suggest that endurance exercise training is beneficial in improving exercise intolerance, heart function and quality of life in young men with BTHS. This study will examine the effects of Endurance (i.e. aerobic) exercise training on exercise tolerance, heart function, and quality of life in adolescents and young adults with BTHS. We hypothesize that 3 months of endurance training will improve exercise tolerance, heart function and quality of life in adolescents and young men with BTHS.


Condition Intervention
Barth Syndrome
Behavioral: Exercise training

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Safety and Efficacy of Aerobic Exercise Training in Barth Syndrome

Resource links provided by NLM:


Further study details as provided by Washington University School of Medicine:

Primary Outcome Measures:
  • Peak oxygen consumption [ Time Frame: Enrollment and 3 months ] [ Designated as safety issue: No ]
    peak oxygen consumption measured by indirect calorimetry


Secondary Outcome Measures:
  • Cardiac output [ Time Frame: Enrollment and 3 months ] [ Designated as safety issue: No ]
    cardiac output measured by echocardiography

  • muscle oxygen extraction [ Time Frame: Enrollment and 3 months ] [ Designated as safety issue: No ]
    skeletal muscle oxygen extraction measured by near infrared spectroscopy


Enrollment: 4
Study Start Date: July 2010
Study Completion Date: December 2013
Primary Completion Date: December 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Exercise training
Aerobic exercise training 45-60 min/3x/week/12 weeks
Behavioral: Exercise training
aerobic exercise training, 45-60 minutes, 3x/week, 12 weeks (3-months)

Detailed Description:

Barth Syndrome (BTHS) is an X-linked disorder characterized by severe mitochondrial dysfunction, skeletal and cardiomyopathy and growth retardation. The investigators have recently found severe exercise intolerance in adolescents with BTHS that was mediated by impaired skeletal muscle oxygen extraction and utilization. Previous evidence from other mitochondrial pathologies demonstrated that chronic aerobic exercise training enhanced mitochondrial biogenesis, improved skeletal muscle oxygen extraction/utilization, exercise tolerance and quality of life in these individuals. Chronic aerobic exercise training also improved left ventricular and cardio-autonomic function and decreased the occurrence of arrhythmias in non-Barth heart failure and arrhythmia human and animal models. Currently it is unknown if chronic aerobic exercise training is effective in improving left ventricular function, skeletal muscle mitochondrial biogenesis and oxygen extraction/utilization, exercise tolerance, cardio-autonomic function and quality of life in those with BTHS; a condition containing characteristics consistent with both mitochondrial myopathy and heart failure. Establishing the safety and efficacy of aerobic exercise training in BTHS could lead to clinical recommendations of regular exercise training for the standard of care treatment of individuals with BTHS. It may also provide novel mechanistic information about the adaptability of muscle mitochondria in BTHS. Therefore, the overall objective of the pilot/feasibility/proof-of-concept proposal is to collect preliminary data on the following hypothesis: Supervised aerobic exercise training (3x/wk, 20-45 min, 12 wks) will improve skeletal muscle oxygen extraction/utilization, left ventricular function, peak exercise tolerance, cardio-autonomic function and quality of life, and will be found safe in adolescents and young adults with BTHS. The investigators aim to address these hypotheses through left ventricular function, skeletal muscle oxygen extraction/utilization, and whole body oxygen consumption measurements during a graded exercise test at baseline and following a 3 month supervised aerobic exercise training program in 5 BTHS patients (ages 15-30 yrs). Cardio-autonomic function will be examined using post-exercise heart rate recovery measurements obtained at baseline and after the 12 wk intervention. Supervised exercise training programs will be uniformly designed, but individualized and performed at a hospital based physical therapy or cardiac rehabilitation facility near the participant's home. Left ventricular function will be examined using 2-D, Doppler and Tissue Doppler echocardiography, skeletal muscle oxygen extraction/utilization will be measured using near infrared spectroscopy, whole body oxygen consumption will be measured using indirect calorimetry, cardio-autonomic function will be measured using electrocardiography and quality of life will be measured by the Minnesota Living with Heart Failure Questionnaire (MLWHFQ). The investigators expect to find that exercise training is safe in BTHS, and effectively improves cardiac and skeletal muscle function and quality of life. Preliminary data from this proposal will be used in larger federal or association grant applications examining the cardiovascular, musculo-skeletal and autonomic effects of chronic aerobic exercise training in BTHS.

  Eligibility

Ages Eligible for Study:   15 Years to 30 Years
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  1. Age 15-30 years
  2. Sedentary (exercises less than 2x/wk)
  3. Motivated to exercise
  4. Stable on medications for ≥ 3 months
  5. Lives in North America.
  6. Planning on attending the Barth Syndrome International Conference in July 2010.

Exclusion Criteria:

  1. Unstable heart disease
  2. Any concurrent disease that may contraindicate exercise testing and training.
  3. Cardiac transplantation
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT01194141

Sponsors and Collaborators
Washington University School of Medicine
Investigators
Principal Investigator: William T Cade, PT, PhD Washington University Early Recognition Center
  More Information

Additional Information:
No publications provided

Responsible Party: W. Todd Cade, Assisant Professor of Physical Therapy and Medicine, Washington University School of Medicine
ClinicalTrials.gov Identifier: NCT01194141     History of Changes
Other Study ID Numbers: 10-0652
Study First Received: August 30, 2010
Last Updated: December 18, 2013
Health Authority: United States: Institutional Review Board

Keywords provided by Washington University School of Medicine:
Barth syndrome
cardiomyopathy
mitochondria
cardiolipin

Additional relevant MeSH terms:
Barth Syndrome
Heart Defects, Congenital
Cardiovascular Abnormalities
Cardiovascular Diseases
Heart Diseases
Abnormalities, Multiple
Congenital Abnormalities
Genetic Diseases, X-Linked
Genetic Diseases, Inborn
Lipid Metabolism, Inborn Errors
Metabolism, Inborn Errors
Metabolic Diseases

ClinicalTrials.gov processed this record on July 23, 2014