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Yin X, Prendiville O, McNamara AE, Brennan L. Targeted Metabolomic Approach to Assess the Reproducibility of Plasma Metabolites over a Four Month Period in a Free-Living Population. J Proteome Res 2022; 21:683-690. [PMID: 34978446 PMCID: PMC8902803 DOI: 10.1021/acs.jproteome.1c00440] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Metabolomics
is increasingly applied to investigate diet–disease
associations in nutrition research. However, studies of metabolite
reproducibility are limited, which could hamper their use within epidemiologic
studies. The objective of this study was to evaluate the metabolite
reproducibility during 4 months in a free-living population. In the
A-DIET Confirm study, fasting plasma and dietary data were collected
once a month for 4 months. Metabolites were measured using liquid
chromatography tandem mass spectrometry, and their reproducibility
was estimated using the intraclass correlation coefficient (ICC).
Regularized canonical correlation analysis (rCCA) was employed to
examine the diet–metabolite associations. In total, 138 metabolites
were measured, and median ICC values of 0.49 and 0.65 were found for
amino acids and biogenic amines, respectively. Acylcarnitines, lysophosphatidylcholines,
phosphatidylcholines, and sphingomyelins had median ICC values of
0.69, 0.66, 0.63, and 0.63, respectively. The median ICC for all metabolites
was 0.62, and 54% of metabolites had ICC values ≥0.60. Additionally,
the rCCA heat map revealed positive correlations between dairy/meat
intake and specific lipids. In conclusion, more than half of the metabolites
demonstrated good to excellent reproducibility. A single measurement
per subject could appropriately reflect the metabolites’ long-term
concentration levels and may also be sufficient for assessing disease
risk in epidemiologic studies. The study data are deposited in MetaboLights
(MTBLS3428 (www.ebi.ac.uk/metabolights)).
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Affiliation(s)
- Xiaofei Yin
- UCD School of Agriculture and Food Science, Institute of Food and Health, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland
| | - Orla Prendiville
- UCD School of Agriculture and Food Science, Institute of Food and Health, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland
| | - Aoife E McNamara
- UCD School of Agriculture and Food Science, Institute of Food and Health, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland
| | - Lorraine Brennan
- UCD School of Agriculture and Food Science, Institute of Food and Health, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 D4 V1W8, Ireland
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Floegel A, Drogan D, Wang-Sattler R, Prehn C, Illig T, Adamski J, Joost HG, Boeing H, Pischon T. Reliability of serum metabolite concentrations over a 4-month period using a targeted metabolomic approach. PLoS One 2011; 6:e21103. [PMID: 21698256 PMCID: PMC3115978 DOI: 10.1371/journal.pone.0021103] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 05/19/2011] [Indexed: 11/18/2022] Open
Abstract
Metabolomics is a promising tool for discovery of novel biomarkers of chronic disease risk in prospective epidemiologic studies. We investigated the between- and within-person variation of the concentrations of 163 serum metabolites over a period of 4 months to evaluate the metabolite reliability expressed by the intraclass-correlation coefficient (ICC: the ratio of between-person variance and total variance). The analyses were performed with the BIOCRATES AbsoluteIDQ™ targeted metabolomics technology, including acylcarnitines, amino acids, glycerophospholipids, sphingolipids and hexose in 100 healthy individuals from the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam study who had provided two fasting blood samples 4 months apart. Overall, serum reliability of metabolites over a 4-month period was good. The median ICC of the 163 metabolites was 0.57. The highest ICC was observed for hydroxysphingomyelin C14:1 (ICC = 0.85) and the lowest was found for acylcarnitine C3:1 (ICC = 0). Reliability was high for hexose (ICC = 0.76), sphingolipids (median ICC = 0.66; range: 0.24-0.85), amino acids (median ICC = 0.58; range: 0.41-0.72) and glycerophospholipids (median ICC = 0.58; range: 0.03-0.81). Among acylcarnitines, reliability of short and medium chain saturated compounds was good to excellent (ICC range: 0.50-0.81). Serum reliability was lower for most hydroxyacylcarnitines and monounsaturated acylcarnitines (ICC range: 0.11-0.45 and 0.00-0.63, respectively). For most of the metabolites a single measurement may be sufficient for risk assessment in epidemiologic studies with healthy subjects.
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Affiliation(s)
- Anna Floegel
- Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany.
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Investigation of interaction of human platelet membrane components with anticoagulant drugs Abciximab and Eptifibatide. Folia Histochem Cytobiol 2011; 48:687-92. [PMID: 21478117 DOI: 10.2478/v10042-010-0090-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abciximab (Abci) and eptifibatide (Epti) are antiaggregate drugs which may reduce thrombotic complications in acute coronary syndromes. The aim of this work was the investigation of the interaction between the phospholipid-GPIIb/IIIa glycoprotein complex and Abci or Epti, and the influence of these drugs on the phospholipid ratio in the platelet membrane. The interaction between the phospholipid-GPIIb/IIIa glycoprotein complex and antiaggregate drugs were investigated using the Surface Plasmon Resonance Imaging technique (SPRI). Phospholipids phosphatidylinositol (PI), phosphatidylserine (PS), phosphatidylethanolamine (PE), phosphatidylcholine (PC) and sphingomyelin (SM) were first immobilized onto the gold chip surface. The phospholipid ratio in the platelet membrane was determined by the HPLC. Only PI, PS, PE and PC were determined. Human platelets treated 'in vitro' with Abci or Epti exhibit changes in the phospholipid ratio in the platelet membrane. The ratio of PS decreases and PC rises. The SPRI distinctly shows interactions between phospholipids and glycoprotein GPIIb/IIIa, and between the phospholipid-glycoprotein GPIIb/IIIa complex and Abci or Epti. The interaction between phospholipids and glycoprotein GPIIb/IIIa is growing in the sequence: PI<<SM<PE<PC<PS. The interaction between phospholipid-glycoprotein GPIIb/IIIa complex and Abci/Epti is growing in the sequence: PS<PI<PC<PE<SM. SPRI was proved to be excellent tool for observation of such interactions.
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Affiliation(s)
- Joseph Sherma
- Department of Chemistry, Lafayette, Collegte, Easton, Pennsylvania 18042, USA
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