Prevention of Dichloroacetate Toxicity
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|ClinicalTrials.gov Identifier: NCT00031161|
Recruitment Status : Completed
First Posted : February 27, 2002
Last Update Posted : March 25, 2015
|Condition or disease||Intervention/treatment||Phase|
|Acidosis, Lactic Chronic Disease||Drug: Nitisinone (NTBC) Drug: Dichloroacetate Behavioral: Low-tyrosin diet||Not Applicable|
DCA is being studied for the treatment of patients with CLA, which is a rare collection of mitochondrial metabolism errors causing cellular energy failure and early death. DCA causes reversible liver and peripheral nerve toxicity and it interrupts both tyrosine and heme metabolism. The inhibitory effect of DCA on mammalian tyrosine metabolism elicits biochemical changes similar to those observed in hereditary tyrosinemia type I (HT). However, some reports and studies indicate substantial reduction in the biochemical and clinical consequences of HT may occur when patients are treated concomitantly with a low-tyrosine diet (LTD) and the chemical NTBC, which inhibits an early step in tyrosine catabolism. Possibly, the same dietary and pharmacologic interventions may mitigate or prevent toxicity associated with chronic DCA exposure.
Patients visit the Center 5 times over a 1-year period, usually for 2 to 3 days per visit, for an extensive series of clinical and biochemical tests. Visit 1 is for baseline examinations and blood and urine chemistries and to educate the patient on an LTD. This visit lasts approximately 7 days to determine acceptable circulating tyrosine concentrations for LTD formula at discharge. Patients are provided with tubes to take to local laboratories every 2 weeks for blood work. Patients are readmitted in 1 month to determine adherence to diet and serum tyrosine levels. Patients who evidence dietary compliance, no adverse effects, and a willingness to continue are placed in 1 of 2 treatment arms: DCA plus an LTD plus placebo or DCA plus an LTD plus NTBC. Thereafter, patients return during Months 5, 9, and 13, which completes their 1-year treatment phase.
Completion date provided represents the completion date of the grant per OOPD records
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||30 participants|
|Official Title:||Prevention of Dichloroacetate Toxicity|
|Study Start Date :||September 2001|
|Study Completion Date :||September 2005|
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00031161
|United States, Florida|
|University of Florida|
|Gainesville, Florida, United States, 32610|