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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/24439

Title: Peripheral blood mitochondrial DNA content in relation to circulating metabolites and inflammatory markers: A population study
Authors: Knez, Judita
Marrachelli, Vannina G.
Cauwenberghs, Nicholas
Winckelmans, Ellen
Zhang, Zhenyu
Thijs, Lutgarde
Brguljan-Hitij, Jana
Plusquin, Michelle
Delles, Christian
Monleon, Daniel
Redon, Josep
Staessen, Jan A.
Nawrot, Tim S.
Kuznetsova, Tatiana
Issue Date: 2017
Citation: PLOS ONE, 12(7), p. 1-13
Abstract: Mitochondrial DNA (mtDNA) content might undergo significant changes caused by metabolic derangements, oxidative stress and inflammation that lead to development and progression of cardiovascular diseases. We, therefore, investigated in a general population the association of peripheral blood mtDNA content with circulating metabolites and inflammatory markers. We examined 310 subjects (50.6% women; mean age, 53.3 years) randomly selected from a Flemish population. Relative mtDNA content was measured by quantitative real-time PCR in peripheral blood cells. Peak circulating metabolites were quantified using nuclear magnetic resonance spectroscopy. The level of inflammation was assessed via established inflammatory markers. Using Partial Least Squares analysis, we constructed 3 latent factors from the 44 measured metabolites that explained 62.5% and 8.5% of the variance in the contributing metabolites and the mtDNA content, respectively. With adjustments applied, mtDNA content was positively associated with the first latent factor (P = 0.002). We identified 6 metabolites with a major impact on the construction of this latent factor including HDL3 apolipoproteins, tyrosine, fatty acid with alpha CH2, creatinine, beta-glucose and valine. We summarized them into a single composite metabolite score. We observed a negative association between the composite metabolic score and mtDNA content (P = 0.001). We also found that mtDNA content was inversely associated with inflammatory markers including hs-CRP, hs-IL6, white blood cell and neutrophil counts as well as neutrophil-to-lymphocyte ratio (P <= 0.0024). We demonstrated that in a general population relative peripheral blood mtDNA content was associated with circulating metabolites indicative of perturbed lipid metabolism and with inflammatory biomarkers.
Notes: [Knez, Judita; Cauwenberghs, Nicholas; Zhang, Zhenyu; Thijs, Lutgarde; Staessen, Jan A.; Kuznetsova, Tatiana] Univ Leuven, KU Leuven, Dept Cardiovasc Sci, Res Unit Hypertens & Cardiovasc Epidemiol, Leuven, Belgium. [Knez, Judita; Brguljan-Hitij, Jana] Univ Med Ctr Ljubljana, Div Internal Med, Dept Hypertens, Ljubljana, Slovenia. [Marrachelli, Vannina G.; Monleon, Daniel; Redon, Josep] Fdn Invest Clin Valencia INCLIVA, Metabol & Mol Image Lab, Valencia, Spain. [Winckelmans, Ellen; Plusquin, Michelle; Nawrot, Tim S.] Hasselt Univ, Ctr Environm Sci, Diepenbeek, Belgium. [Delles, Christian] Univ Glasgow, Inst Cardiovasc & Med Sci, Glasgow, Lanark, Scotland. [Nawrot, Tim S.] Univ Leuven, KU Leuven, Dept Publ Hlth Occupat & Environm Med, Leuven, Belgium.
URI: http://hdl.handle.net/1942/24439
DOI: 10.1371/journal.pone.0181036
ISI #: 000405649700078
ISSN: 1932-6203
Category: A1
Type: Journal Contribution
Validation: ecoom, 2018
Appears in Collections: Research publications

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