Mitochondrial trifunctional protein deficiency

Definition:

Mitochondrial trifunctional protein (TFP) deficiency is a rare autosomal recessive disorder that is caused by mutations in HADHA and HADHB. TFP is a multienzyme complex of the fatty acid beta-oxidation cycle. Human TFP is an octamer composed of four alpha-subunits harboring long-chain enoyl-CoA hydratase and long-chain L-3-hydroxyacyl-CoA dehydrogenase (LCHAD) and four beta-subunits encoding long-chain 3-ketoacyl-CoA thiolase (LCKAT). This disease includes a lethal neonatal phenotype with cardiomyopathy and Reye-like syndrome, an infantile hepatic phenotype with recurrent hypoketotic hypoglycemia, and a childhood or adolescent-onset neuromyopathic phenotype with peripheral neuropathy and recurrent rhabdomyolysis.

References:

[1]. J A Ibdah, et al. Mild trifunctional protein deficiency is associated with progressive neuropathy and myopathy and suggests a novel genotype-phenotype correlation. J Clin Invest. 1998 Sep 15;102(6):1193-9. [Content Brief]

[2]. Patricia M Jones, et al. Accumulation of 3-hydroxy-fatty acids in the culture medium of long-chain L-3-hydroxyacyl CoA dehydrogenase (LCHAD) and mitochondrial trifunctional protein-deficient skin fibroblasts: implications for medium chain triglyceride dietary treatment of LCHAD deficiency. Pediatr Res. 2003 May;53(5):783-7. [Content Brief]

[3]. Teerin Liewluck, et al. Mitochondrial trifunctional protein deficiency: a rare cause of adult-onset rhabdomyolysis. Muscle Nerve. 2013 Dec;48(6):989-91. [Content Brief]

[4]. Ute Spiekerkoetter, et al. General mitochondrial trifunctional protein (TFP) deficiency as a result of either alpha- or beta-subunit mutations exhibits similar phenotypes because mutations in either subunit alter TFP complex expression and subunit turnover. Pediatr Res. 2004 Feb;55(2):190-6. [Content Brief]

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