Carnitine and/or Acetylcarnitine Deficiency as a Cause of Higher Levels of Ammonia

Blood carnitine and/or acetylcarnitine deficiencies are postulated in the literature as possible causes of higher ammonia levels. The aim of this study was to investigate if the use of valproic acid, the age of the patients, or certain central nervous system pathologies can cause carnitine and/or ac...

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Veröffentlicht in:BioMed research international 2016-01, Vol.2016 (2016), p.1-8
Hauptverfasser: Fagiolino, Pietro, González, Raquel, Queijo, Cecilia, Guevara, Natalia, Maldonado, Cecilia, Vázquez, Marta
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container_title BioMed research international
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creator Fagiolino, Pietro
González, Raquel
Queijo, Cecilia
Guevara, Natalia
Maldonado, Cecilia
Vázquez, Marta
description Blood carnitine and/or acetylcarnitine deficiencies are postulated in the literature as possible causes of higher ammonia levels. The aim of this study was to investigate if the use of valproic acid, the age of the patients, or certain central nervous system pathologies can cause carnitine and/or acetylcarnitine deficiency leading to increased ammonia levels. Three groups of patients were studied: (A) epileptic under phenytoin monotherapy (n=31); (B) with bipolar disorder under valproic acid treatment (n=28); (C) elderly (n=41). Plasma valproic acid and blood carnitine and acyl carnitine profiles were determined using a validated HPLC and LC-MS/MS method, respectively. Blood ammonia concentration was determined using an enzymatic automated assay. Higher ammonia levels were encountered in patients under valproic acid treatment and in the elderly. This may be due to the lower carnitine and/or acetylcarnitine found in these patients. Patients with controlled seizures had normal carnitine and acetylcarnitine levels. Further studies are necessary in order to conclude if the uncontrolled bipolar disorder could be the cause of higher carnitine and/or acetylcarnitine levels.
doi_str_mv 10.1155/2016/2920108
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The aim of this study was to investigate if the use of valproic acid, the age of the patients, or certain central nervous system pathologies can cause carnitine and/or acetylcarnitine deficiency leading to increased ammonia levels. Three groups of patients were studied: (A) epileptic under phenytoin monotherapy (n=31); (B) with bipolar disorder under valproic acid treatment (n=28); (C) elderly (n=41). Plasma valproic acid and blood carnitine and acyl carnitine profiles were determined using a validated HPLC and LC-MS/MS method, respectively. Blood ammonia concentration was determined using an enzymatic automated assay. Higher ammonia levels were encountered in patients under valproic acid treatment and in the elderly. This may be due to the lower carnitine and/or acetylcarnitine found in these patients. Patients with controlled seizures had normal carnitine and acetylcarnitine levels. 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The aim of this study was to investigate if the use of valproic acid, the age of the patients, or certain central nervous system pathologies can cause carnitine and/or acetylcarnitine deficiency leading to increased ammonia levels. Three groups of patients were studied: (A) epileptic under phenytoin monotherapy (n=31); (B) with bipolar disorder under valproic acid treatment (n=28); (C) elderly (n=41). Plasma valproic acid and blood carnitine and acyl carnitine profiles were determined using a validated HPLC and LC-MS/MS method, respectively. Blood ammonia concentration was determined using an enzymatic automated assay. Higher ammonia levels were encountered in patients under valproic acid treatment and in the elderly. This may be due to the lower carnitine and/or acetylcarnitine found in these patients. Patients with controlled seizures had normal carnitine and acetylcarnitine levels. Further studies are necessary in order to conclude if the uncontrolled bipolar disorder could be the cause of higher carnitine and/or acetylcarnitine levels.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><pmid>26998483</pmid><doi>10.1155/2016/2920108</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Acetylcarnitine - blood
Acetylcarnitine - deficiency
Adolescent
Adult
Age
Aged
Aged, 80 and over
Ammonia
Ammonia - blood
Biosynthesis
Bipolar disorder
Bipolar Disorder - blood
Bipolar Disorder - drug therapy
Carnitine
Carnitine - blood
Carnitine - deficiency
Divalproex
Enzymes
Epilepsy - blood
Epilepsy - drug therapy
Female
High performance liquid chromatography
Humans
Male
Medical research
Medicine, Experimental
Metabolism
Metabolites
Middle Aged
Older people
Phenytoin - administration & dosage
Valproic acid
Valproic Acid - administration & dosage
title Carnitine and/or Acetylcarnitine Deficiency as a Cause of Higher Levels of Ammonia
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