A Pilot Study of Rapid Haplotyping Procedure for Personalized Dosing of Dichloroacetate (DCA) in Healthy Volunteers
This trial is enrolling by invitation only.
|Treatments||dichloroacetate (dca), gstz1 haplotyping|
|Sponsor||University of Florida|
|Collaborator||Medosome Biotec LLC|
|Start date||March 2016|
|End date||February 2017|
|Trial size||50 participants|
|Trial identifier||NCT02690285, IRB201500995|
The purpose of this study is to identify and analyze the frequency of GSTZ1 haplotypes in a healthy adult population and determine the pharmacokinetics of Dichloroacetate (DCA) metabolism based on haplotype analysis.
The DCA drug is the first targeted treatment for Pyruvate Dehydrogenase Complex Deficiency (PDCD).
This pilot study, focuses on developing a high throughput, sensitive and accurate screening test for determining glutathione transferase zeta 1 (GSTZ1) haplotype status in individuals who would be treated with DCA.
|Intervention model||single group assignment|
GSTZ1 haplotype frequency
time frame: Baseline Visit
Peak Plasma Concentration (Cmax) of Dichloroacetate (DCA)
time frame: -10, 0, 5, 10, 20, 30 minutes and at 1, 2, 4, 6, 8, 12, 24, 30 hours post dose
All participants from 18 years up to 70 years old.
- Healthy as outline in the physical exam and blood tests
- Non smoker
- Cannot comprehend or refuse to sign the informed consent form;
- Febrile or have other clinical signs of infection;
- Pregnant or are nursing;
- In females, cannot or refuse to use contraception or avoid unprotected intercourse during the study;
- Uncontrolled hypertension (BPs > 160 mmHg or BPd > 100 mmHg) on conventional medication;
- Anemic (hematocrit < 35% in males; < 35% in females;
- Serum creatinine ≥ 1.3 mg/dl, TSH > 4.5 mIU/ml; a transaminase (ALT or AST) > 2 x ULN, total bilirubin > 1.2 mg/dl or fasting glucose ≥ 110 mg/dl.
- History of psychosis, seizures or diabetes mellitus or be receiving anti-psychotic, anti-epileptic or blood glucose-lowering medication.
|Official title||A Pilot Study of Rapid Haplotyping Procedure for Personalized Dosing of Dichloroacetate (DCA) in Healthy Volunteers Part 1: Rapid Haplotyping Procedure for Determining the Response of Patients to DCA. Part 2: Personalized Dosing of Dichloroacetate for the Treatment of Rare and Common Diseases|
|Principal investigator||Peter W Stacpoole, PhD, MD|
|Description||Pyruvate dehydrogenase complex (PDC) deficiency (PDCD) is a rare disease of mitochondrial energy failure with the life of expectancy of affected children severely truncated. Treatment of PDCD remains a serious, unmet challenge. Dichloroacetate (DCA) represents the first targeted therapy for PDCD by stimulating residual PDC activity. Cumulative experience with DCA has revealed dose accumulation in a subset of the population. This can be abated through personalized dosing of DCA, assigned by haplotype variation in the gene encoding glutathione transferase zeta 1 (GSTZ1), which biotransforms DCA to glyoxylate. Haplotype variations in GSTZ1 influence the kinetics and dynamics of chronically administered DCA. A single dose of DCA has a bioavailability approaching unity and is widely distributed throughout the body. The plasma half-life (t ½) is ~1 hr in drug-naïve subjects. Gender does not influence DCA kinetics or metabolism. The major route of biotransformation is via dehalogenation to glyoxylate by glutathione transferase zeta 1 (GSTZ1). DCA is a mechanism-based inhibitor of GSTZ1, so repeated administration results in increased plasma t ½ and decreased clearance.|
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