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Plasma acylcarnitines are associated with pulmonary hypertension.

Abstract：

:Quantifying metabolic derangements in pulmonary hypertension (PH) by plasma metabolomics could identify biomarkers useful for diagnosis and treatment. The objective of this paper is to test the hypotheses that circulating metabolites are differentially expressed in PH patients compared with controls and among different hemodynamic subtypes of PH associated with left heart disease. We studied patients enrolled in the CATHGEN biorepository with PH (right heart catheterization mPAP ≥ 25 mmHg; n = 280). Of these, 133 met criteria for postcapillary PH, 82 for combined precapillary and postcapillary PH (CpcPH), and 65 for precapillary PH. Targeted profiling of 63 metabolites (acylcarnitines, amino acids, and ketones) was performed using tandem flow injection mass spectrometry. Multivariable linear regression was used to determine differences in metabolite factors derived from a principal components analysis between PH cases, PH subtypes, and non-PH controls. In adjusted models, the metabolite factor loaded with long-chain acylcarnitines was higher in all PH cases versus non-PH controls (P = 0.00008), but did not discriminate between CpcPH and postcapillary PH (P = 0.56). In analyses of subtypes, CpcPH patients had lower levels of factors loaded with urea cycle amino acids and short chain acylcarnitines as compared to controls (P = 0.002 and P = 0.01, respectively) and as compared to postcapillary PH (P = 0.04 and P = 0.02, respectively). Compared to controls, PH was strongly associated with greater concentrations of long-chain acylcarnitines. Postcapillary PH and CpcPH were weakly associated with distinct metabolomic profiles. These findings suggest the presence of unique metabolic abnormalities in subtypes of PH and may reflect underlying pathophysiology.

journal_name

Pulm Circ

journal_title

Pulmonary circulation

authors

Luo N,Craig D,Ilkayeva O,Muehlbauer M,Kraus WE,Newgard CB,Shah SH,Rajagopal S

doi

10.1086/690554

subject

Has Abstract

pub_date

2017-02-01 00:00:00

pages

211-218

issue

1

eissn

2045-8932

issn

2045-8940

pii

10.1086_690554

journal_volume

7

pub_type

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