Carnitin-Palmitoyl Transferase type 2 deficiency: a rare cause of acute renal failure due to rhabdomyolysis

Abstract

Fatty acid oxidation disorders are inborn errors of metabolism. One of the possible alterations involves the failure of the carnitin-based transport of long-chain fatty acids into the mitochondria, necessary for muscle metabolism in case of prolonged physical exertion. Three kinds of Carnitin-Palmitoyl Transferase type 2 (CPT2) deficiency have been described: a myopathic form, a severe infantile form and a neonatal form. The clinical picture is characterized by recurrent attacks of rhabdomyolysis, muscular pains and fatigue, secondary to a prolonged physical exercise and sometimes aggravated by intercurrent events. Rhabdomyolysis episodes are associated with a significant increase in creatine phosphokinase and myoglobinuria and may result in acute renal failure. Patients are usually asymptomatic during intercurrent periods. When acute renal failure from rhabdomyolysis arises after intense physical activity, it is therefore necessary to also investigate the presence of metabolic myopathies due to enzymatic deficiency.

Keywords: deficit CPT2, rhabdomyolysis, acute renal failure

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Background

La rabdomiolisi può determinare quadri clinici differenti: dalla dismissione subclinica degli enzimi muscolari fino all’Insufficienza Renale Acuta (IRA). Ciò può associarsi a Crush Syndrome, ma in più dell’80% dei casi è presente una causa farmacologica; non vanno dimenticate possibili alterazioni strutturali o disordini metabolici ereditari delle cellule muscolari. Uno di questi è il deficit di Carnitin-Palmitoil Transferasi di tipo 2 (CPT2), anomalia ereditaria autosomica recessiva dell’ossidazione mitocondriale degli acidi grassi a catena lunga (LCFA), necessari per il metabolismo muscolare in caso di sforzo fisico prolungato [1].  

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Abstract

Fatty acid oxidation disorders are inborn errors of metabolism. One of the possible alterations involves the failure of the carnitin-based transport of long-chain fatty acids into the mitochondria, necessary for muscle metabolism in case of prolonged physical exertion. Three kinds of Carnitin-Palmitoyl Transferase type 2 (CPT2) deficiency have been described: a myopathic form, a severe infantile form and a neonatal form. The clinical picture is characterized by recurrent attacks of rhabdomyolysis, muscular pains and fatigue, secondary to a prolonged physical exercise and sometimes aggravated by intercurrent events. Rhabdomyolysis episodes are associated with a significant increase in creatine phosphokinase and myoglobinuria and may result in acute renal failure. Patients are usually asymptomatic during intercurrent periods. When acute renal failure from rhabdomyolysis arises after intense physical activity, it is therefore necessary to also investigate the presence of metabolic myopathies due to enzymatic deficiency.

 

Keywords: deficit CPT2, rhabdomyolysis, acute renal failure

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Acute kidney injury and rhabdomyolysis after cocaine overdose: case report and literature review

Abstract

Cocaine, a natural alkaloid derived from the coca plant, is one of the most commonly used illicit drugs.
Cocaine abuse causes systemic adverse effects like stroke, myocardic infarction, arterial dissection, vascular thrombosis and rhabdomyolysis.
Cocaine use is, also, associated with renal complications such as acute kidney injury, vasculitis, acute interstitial nephritis, chronic kidney disease, malignant hypertension with thrombotic microangiopathy.
Acute kidney injury may or may be not associated to rhabdomyolysis.
Rhabdomyolysis caused by cocaine abuse is multifactorial, involving tissue ischemia secondary to vasoconstriction and cellular damage caused by the drug.
We report a 50-year-old man with history of chronic hepatitis C and substance abuse admitted to our unit with severe rhabdomyolysis and acute kidney failure after nasal insufflation of cocaine overdose. Renal function recovered after several treatments of dialysis.
We conclude that cocaine adversely impacts kidney function; in addition cocaine and rhabdomyolysis are the double danger for acute kidney injury. Medical management of cocaine toxicity requires a multisystem approach, with close monitoring cardiac, neurological and renal function.

Keywords: Acute kidney injury, rhabdomyolysis, cocaine

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Introduzione

La cocaina, un alcaloide del tropano presente nelle foglie della pianta di coca di eritroxilone, nota come il più potente stimolatore di origine naturale, esalta e prolunga gli effetti della stimolazione simpatica inibendo il reuptake delle catecolamine nelle terminazioni nervose (1, 2). 

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