Compassionate Use of Triheptanoin (C7) for Inherited Disorders of Energy Metabolism

Dietary Therapy for Inherited Disorders of Energy Metabolism

This is a compassionate use study to allow patients already taking triheptanoin (C7) through previous studies to continue to receive the supplement. It will also allow triheptanoin supplementation in patients with qualifying disorders if they are failing conventional therapy.

Study Overview

• Status: No longer available
• Conditions: Barth Syndrome; Mitochondrial Trifunctional Protein Deficiency; Very Long-chain acylCoA Dehydrogenase (VLCAD) Deficiency; Carnitine Palmitoyltransferase Deficiencies (CPT1, CPT2); Long-chain Hydroxyacyl-CoA Dehydrogenase Deficiency; Glycogen Storage Disorders; Pyruvate Carboxylase Deficiency Disease; ACYL-CoA DEHYDROGENASE FAMILY, MEMBER 9, DEFICIENCY of
• Intervention / Treatment: Drug: triheptanoin

Detailed Description

This study will treat children and adults who have documented deficiencies of mitochondrial fatty acid oxidation including disorders of the following enzymes: Carnitine-Acylcarnitine Translocase (CATR), Carnitine Palmitoyltransferase I and II (CPT I, CPT II), Very-Long Chain Acyl-CoA dehydrogenase (VLCAD), L-3-Hydroxy-Acyl-CoA Dehydrogenase (LCHAD), Acyl-CoA Dehydrogenase type 9 (ACAD9) and Mitochondrial Trifunctional Protein (TFP) with triheptanoin oil. This study is also open to patients with any type of glycogen storage disease, pyruvate carboxylase deficiency, or Barth Syndrome.

Symptoms often persist with standard diet including supplementation with medium chain triglyceride oil. Preliminary data shows triheptanoin to reverse many of the clinical symptoms not well controlled by standard diet.

On study entry, clinical and laboratory assessments will be carried out with the subject on their usual home diet. A complete history and physical exam will be performed. An echocardiogram must be obtained within the past year or it will be performed on the day of study entry. Following analysis of their diet and a negative pregnancy test, subjects will receive a modified diet containing triheptanoin (up to 2 grams/kg/24 hours for most subjects; subjects who experience cardiomyopathy may receive doses up to 4 grams/kg/24 hours), or continued on their previously established triheptanoin dose; not to exceed RDA for fat, substituted for their MCT oil and/or natural fat. This will be given by g-tube or orally divided into 2 or more doses. The dose will be adjusted on the basis of safety laboratory monitoring at specific time points and for adverse symptoms. The remainder of their diet will be modified to maintain appropriate caloric intake and balance. Total calories appropriate for RDA will be prescribed.

Study subjects will continue the triheptanoin-supplemented diet for a period of 12 months and then be able to continue into an indefinite extension phase in this compassionate use study. Laboratory evaluations will take place at two, six, and twelve months, as well as every 12 months in the extension phase. Laboratory tests may be completed at a local lab and the results forwarded to the PI for review between visits in Pittsburgh. Patients will monitor their weight at home on a monthly basis. Interim metabolic evaluations will be arranged as needed on a clinical basis with the study PI or the subject's home metabolic physician. Following the initial 12 months of the protocol, subjects will be placed on a continuing schedule for maintenance of triheptanoin therapy with a yearly follow up visit for an undeterminable period of time. Echocardiograms must be completed on an annual basis and sent to the study PI to review.

Travel to Pittsburgh, PA at the start of the study and annually is the responsibility of the subjects. Additionally, there may be study costs that insurance will not cover and subjects will be responsible for covering them. Examples of out-of-pocket study costs subjects may incur in addition to travel expenses including the following: necessary laboratory testing and echocardiograms. The study medication will be provided free of charge.

• Study Type: Expanded Access

Contacts and Locations

Study Locations

• United States
  • Pennsylvania
    • Pittsburgh, Pennsylvania, United States, 15224
      • University of Pittsburgh Division of Medical Genetics, Children's Hospital of Pittsburgh

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 1 month and older (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Ages 1 month and up
• Diagnosis of disorder in long chain fatty acid oxidation, glycogen storage disease, pyruvate carboxylase deficiency, or Barth Syndrome
• Currently receiving triheptanoin as result of participation in previous study will be eligible if they have one of the included diagnoses
• Prefer 2 of following 3: acylcarnitine profile, fibroblast acylcarnitine profile or positive medical genetic test

Exclusion Criteria:

• Pregnant females
• MCAD deficiency
• disorder of short and medium chain fatty acid oxidation or ketone body metabolism

Study Plan

How is the study designed?

Collaborators and Investigators

• Sponsor: Jerry Vockley, MD, PhD
• Collaborators: Ultragenyx Pharmaceutical Inc
• Investigators: Principal Investigator: Jerry Vockley, MD, PhD, Children's Hospital of Pittsburgh, University of Pittsburgh

Study record dates

Study Registration Dates

• First Submitted: October 25, 2011
• First Submitted That Met QC Criteria: October 27, 2011
• First Posted (Estimate): October 28, 2011

Study Record Updates

• Last Update Posted (Actual): December 10, 2021
• Last Update Submitted That Met QC Criteria: December 8, 2021
• Last Verified: December 1, 2021

More Information

Terms related to this study

• Keywords: PC; CPT1; CPT2; TFP; fatty acid oxidation; triheptanoin; long-chain fatty acid oxidation disorders; LCHADD; VLCADD; Glycogen Storage Disorders; GSD; Pyruvate Carboxylase; ACAD9; Barth
• Additional Relevant MeSH Terms: Pathologic Processes; Heart Diseases; Cardiovascular Diseases; Metabolic Diseases; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Congenital Abnormalities; Nutrition Disorders; Genetic Diseases, Inborn; Genetic Diseases, X-Linked; Malnutrition; Carbohydrate Metabolism, Inborn Errors; Metabolism, Inborn Errors; Brain Diseases, Metabolic; Mitochondrial Diseases; Brain Diseases, Metabolic, Inborn; Heart Defects, Congenital; Cardiovascular Abnormalities; Abnormalities, Multiple; Lipid Metabolism, Inborn Errors; Pyruvate Metabolism, Inborn Errors; Disease; Deficiency Diseases; Glycogen Storage Disease; Protein Deficiency; Pyruvate Carboxylase Deficiency Disease; Barth Syndrome
• Other Study ID Numbers: PRO08020019