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PLoS One. 2013 Dec 16;8(12):e82459. doi: 10.1371/journal.pone.0082459. eCollection 2013.

Serum levels of acylcarnitines are altered in prediabetic conditions.

Author information

1
Division of Endocrinology, Department for Internal Medicine, Neurology and Dermatology, University of Leipzig, Leipzig, Germany.
2
IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany.
3
Division of Endocrinology, Department for Internal Medicine, Neurology and Dermatology, University of Leipzig, Leipzig, Germany ; IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany.
4
Center of Laboratory Medicine, University Institute of Clinical Chemistry, Inselspital - Bern University Hospital, Bern, Switzerland.

Abstract

OBJECTIVE:

The role of mitochondrial function in the complex pathogenesis of type 2 diabetes is not yet completely understood. Therefore, the aim of this study was to investigate serum concentrations of short-, medium- and long-chain acylcarnitines as markers of mitochondrial function in volunteers with normal, impaired or diabetic glucose control.

METHODS:

Based on a 75 g oral glucose tolerance test, 1019 studied subjects were divided into a group with normal glucose tolerance (NGT; n = 636), isolated impaired fasting glycaemia (IFG; n = 184), impaired glucose tolerance (IGT; n = 87) or type 2 diabetes (T2D; n = 112). Serum concentrations of free carnitine and 24 acylcarnitines were measured by mass spectrometry.

RESULTS:

Serum levels of acetylcarnitine (C2), propionylcarnitine (C3), octanoylcarnitine (C8), malonylcarnitine/hydroxybutyrylcarnitine (C3DC+C4OH), hexanoylcarnitine (C6), octenoylcarnitine (C8:1), decanoylcarnitine (C10), decenoylcarnitine (C10:1), dodecanoylcarnitine (C12), tetradecenoylcarnitine (C14:1), tetradecadienylcarnitine (C14:2), hydroxytetradecanoylcarnitine (C14OH), hydroxyhexadecanoylcarnitine (C16OH) and octadecenoylcarnitine (C18:1) were significantly different among the groups (all p<0.05 adjusted for age, gender and BMI). Between the prediabetic states C14:1, C14:2 and C18:1 showed significantly higher serum concentrations in persons with IGT (p<0.05). Compared to T2D the IFG and the IGT subjects showed lower serum concentrations of malonylcarnitine/hydroxybutyrylcarnitine (C3DC+C4OH) (p<0.05).

CONCLUSION:

Alterations in serum concentrations of several acylcarnitines, in particular tetradecenoylcarnitine (C14:1), tetradecadienylcarnitine (C14:2), octadecenoylcarnitine (C18:1) and malonylcarnitine/hydroxybutyrylcarnitine (C3DC+C4OH) are associated not only with T2D but also with prediabetic states.

PMID:
24358186
PMCID:
PMC3865089
DOI:
10.1371/journal.pone.0082459
[Indexed for MEDLINE]
Free PMC Article

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