Research
Print page Print page
Switch language
The Capital Region of Denmark - a part of Copenhagen University Hospital
Published

Hydroxylated Long-Chain Acylcarnitines are Biomarkers of Mitochondrial Myopathy

Research output: Contribution to journalJournal articleResearchpeer-review

DOI

  1. Longitudinal Increases in Serum Insulin-like Factor 3 and Testosterone Determined by LC-MS/MS in Pubertal Danish Boys

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Marked Increase in Incident Gynecomastia: A 20-Year National Registry Study, 1998 to 2017

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Oral D/L-3-Hydroxybutyrate stimulates cholecystokinin and insulin secretion and slows gastric emptying in healthy males

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Apolipoprotein M and risk of type 2 diabetes

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Disease Control and Gender Predict the Socioeconomic Effects of Acromegaly: A Nationwide Cohort Study

    Research output: Contribution to journalJournal articleResearchpeer-review

  1. Characteristics of patients with familial Mediterranean fever in Denmark: a retrospective nationwide register-based cohort study

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. upd(20)mat is a rare cause of the Silver-Russell-syndrome-like phenotype: Two unrelated cases and screening of large cohorts

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Impaired lipolysis in propionic acidemia: A new metabolic myopathy?

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Increased risk of sudden death in untreated Primary Carnitine Deficiency

    Research output: Contribution to journalJournal articleResearchpeer-review

View graph of relations

CONTEXT: Plasma acylcarnitines are biomarkers of β-oxidation and are useful in diagnosing several inborn errors of metabolism but have never been investigated systematically in patients with mitochondrial myopathy.

OBJECTIVE: We hypothesized that acylcarnitines can also be biomarkers of mitochondrial myopathy and sought to investigate the prevalence and pattern of elevated acylcarnitines.

DESIGN: This was a prospective cohort study of patients with confirmed mitochondrial myopathy followed at Copenhagen Neuromuscular Center, Rigshospitalet, Copenhagen, Denmark.

PATIENTS: We included 35 patients (44 ± 15 years, 15 women) with mitochondrial myopathy caused by single, large-scale deletions of mitochondrial DNA (n = 17), pathogenic variants in mitochondrial transfer RNA (n = 13), or in proteins of the respiratory chain complexes (n = 5).Concentrations of 35 acylcarnitines were measured using ultra-HPLC and tandem mass-spectrometry. Findings were compared with muscle mutation load in all patients and to respiratory chain activity in 26 patients.

MAIN OUTCOME MEASURES: Prevalence of elevated concentrations of acylcarnitines related to acyl-coenzyme A (CoA) dehydrogenases in patients with mitochondrial myopathy and relation to genotypes/phenotypes.

RESULTS: In total, 27 (77%) patients had elevated concentrations of acylcarnitines related to acyl-CoA dehydrogenases. Elevated concentrations of seven acylcarnitine species were more common in patients compared with a control cohort of >900 individuals, and a specific pattern involving hydroxylated long-chain acylcarnitines occurred in 22 (63%) patients. Severity of derangements was correlated with muscle mutation load and genotypes/phenotypes.

CONCLUSION: In conclusion, elevated concentrations of acylcarnitines is common in patients with mitochondrial myopathy and shows a specific pattern affecting hydroxylated long-chain acylcarnitines, which can have implications for future diagnostic workup of patients.

Original languageEnglish
JournalThe Journal of clinical endocrinology and metabolism
Volume104
Issue number12
Pages (from-to)5968-5976
Number of pages9
ISSN0021-972X
DOIs
Publication statusPublished - 1 Dec 2019

ID: 58279387