Zealand Pharma A/S, Søborg, Denmark
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Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Department of Clinical Biochemistry, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
Steno Diabetes Center Copenhagen, Herlev, Denmark
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) ( 23 ) with an intra-assay and inter-assay coefficient of variation (CV) of <10% ( 24 ). Individual amino acids were measured from lithium-heparinized plasma using liquid chromatography–tandem mass spectrometry (LS-MS/MS) (TSQ Quantiva, Thermo Fisher
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.4 nmol/L (vitamin D n = 50, placebo n = 50) 37 (27–50) years <75 nmol/L; 52 (42–66) nmol/L 18.0 (15.8–21.5) nmol/L TT measured using mass spectrometry 12 weeks 20,000 IU/week (~2,857 IU/day) vs placebo No significant effect 107 (89
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Department of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Central Manchester Foundation Hospitals NHS Trust, Manchester, UK
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Department of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Central Manchester Foundation Hospitals NHS Trust, Manchester, UK
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D (serum 25(OH)D) assay Blood samples were centrifuged at 3000 g for 10 min at 17°C, and aliquots of sera were stored at −80°C. 25(OH)D was assayed using a 25-hydroxy vitamin D mass spectrometry method (Chromsystems) on an AB Sciex 5500 instrument
Endocrinology & Metabolism Unit, CTO A. Alesini Hospital ASL Roma 2, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
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.1258/0004563001899780 ) 13 Miller AG Brown H Degg T Allen K Keevil BG . Measurement of plasma 5-hydroxyindoleacetic acid by liquid chromatography tandem mass spectrometry–comparison with HPLC methodology . Journal of Chromatography: B, Analytical Technologies in
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Department of Obstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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, 23 , 24 ). Of note, the number of subjects varied between analyses owing to a lack of measurements in some cases. Serum concentrations of testosterone and sex hormone-binding globulin (SHBG) were analysed by means of liquid chromatography-mass
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Winterer JC Loriaux DL . Daily cortisol production rate in man determuned by stable isotope dilution/mass spectrometry . Journal of Clinical Endocrinology and Metabolism 1991 72 39 – 45 . ( https://doi.org/10.1210/jcem-72-1-39 ) 10.1210/jcem-72
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Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
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with extreme caution. Ideally, future clinical studies should include measures of total chemerin or specific chemerin isoforms (using isoform-specific antibodies or mass spectrometry) combined with bioassay measures of CMKLR1 and/or GPR1 activation
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Alexandridou A Schorr P Stokes CS Volmer DA . Analysis of vitamin D metabolic markers by mass spectrometry: recent progress regarding the ‘gold standard’ method and integration into clinical practice . Mass Spectrometry Reviews 2021 [epub]. ( https
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, immunoassays, and mass spectrometry ( 102 ), and currently, immunoassays are used most frequently. However, diagnostic errors may still be introduced by the large inter-assay variability of commercial and ‘in-house’ GH assays. A study comparing 96 laboratories
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Department of Obstetrics and Gynecology, Helsinki University Hospital and University of Helsinki, Helsinki, Uusimaa, Finland
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Department of Gynecology and Obstetrics, St. Olav’s Hospital, Trondheim, Norway
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measured by liquid chromatography–mass spectrometry (LC/MS), and SHBG was measured by chemiluminometric immunoassays as reported earlier ( 11 , 17 ). In Danish women, serum testosterone was analyzed using a specific radio-immunoassay after ether extraction