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Wise SA, Camara JE, Burdette CQ, Hahm G, Nalin F, Kuszak AJ, Merkel J, Durazo-Arvizu RA, Williams EL, Hoofnagle AN, Ivison F, Fischer R, van den Ouweland JMW, Ho CS, Law EWK, Simard JN, Gonthier R, Holmquist B, Meadows S, Cox L, Robyak K, Creer MH, Fitzgerald R, Clarke MW, Breen N, Lukas P, Cavalier É, Sempos CT. Interlaboratory comparison of 25-hydroxyvitamin D assays: Vitamin D Standardization Program (VDSP) Intercomparison Study 2 - Part 1 liquid chromatography - tandem mass spectrometry (LC-MS/MS) assays - impact of 3-epi-25-hydroxyvitamin D 3 on assay performance. Anal Bioanal Chem 2021; 414:333-349. [PMID: 34432104 DOI: 10.1007/s00216-021-03576-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/15/2021] [Accepted: 07/23/2021] [Indexed: 12/19/2022]
Abstract
An interlaboratory comparison study was conducted by the Vitamin D Standardization Program (VDSP) to assess the performance of liquid chromatography - tandem mass spectrometry (LC-MS/MS) assays used for the determination of serum total 25-hydroxyvitamin D (25(OH)D), which is the sum of 25-hydroxyvitamin D2 (25(OH)D2) and 25-hydroxyvitamin D3 (25(OH)D3). A set of 50 single-donor samples was assigned target values for concentrations of 25(OH)D2, 25(OH)D3, 3-epi-25-hydroxyvitamin D3 (3-epi-25(OH)D3), and 24R,25-dihydroxyvitamin D3 (24R,25(OH)2D3) using isotope dilution liquid chromatography - tandem mass spectrometry (ID LC-MS/MS). VDSP Intercomparison Study 2 Part 1 includes results from 14 laboratories using 14 custom LC-MS/MS assays. Assay performance was evaluated using mean % bias compared to the assigned target values and using linear regression analysis of the test assay mean results and the target values. Only 53% of the LC-MS/MS assays met the VDSP criterion of mean % bias ≤ |±5%|. For the LC-MS/MS assays not meeting the ≤ |±5%| criterion, four assays had mean % bias of between 12 and 21%. Based on multivariable regression analysis using the concentrations of the four individual vitamin D metabolites in the 50 single-donor samples, the performance of several LC-MS/MS assays was found to be influenced by the presence of 3-epi-25(OH)D3. The results of this interlaboratory study represent the most comprehensive comparison of LC-MS/MS assay performance for serum total 25(OH)D and document the significant impact of the lack of separation of 3-epi-25(OH)D3 and 25(OH)D3 on assay performance, particularly with regard to mean % bias.
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Affiliation(s)
- Stephen A Wise
- Office of Dietary Supplements (ODS), National Institutes of Health (NIH), Bethesda, MD, 20892, USA. .,Scientist Emeritus, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA.
| | - Johanna E Camara
- Chemical Sciences Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA
| | - Carolyn Q Burdette
- Chemical Sciences Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA
| | - Grace Hahm
- Chemical Sciences Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA
| | - Federica Nalin
- Chemical Sciences Division, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA
| | - Adam J Kuszak
- Office of Dietary Supplements (ODS), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Joyce Merkel
- Office of Dietary Supplements (ODS), National Institutes of Health (NIH), Bethesda, MD, 20892, USA
| | - Ramón A Durazo-Arvizu
- Biostatistics Core, The Sabin Research Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90027, USA
| | | | - Andrew N Hoofnagle
- Department of Laboratory Medicine, University of Washington, Seattle, WA, 98185, USA
| | - Fiona Ivison
- Central Manchester Foundation Trust, Manchester, M13 9WL, UK
| | - Ralf Fischer
- Chromsystems Instruments & Chemicals GmbH, 82166, Gräfelfing, Germany
| | | | - Chung S Ho
- Biochemical Mass Spectrometry Unit, Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, 999077, Hong Kong
| | - Emmett W K Law
- Biochemical Mass Spectrometry Unit, Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, 999077, Hong Kong
| | | | | | - Brett Holmquist
- Endocrine Sciences, LabCorp Specialty Testing Group, Agoura Hills, CA, 91301, USA
| | - Sarah Meadows
- Medical Research Council (MRC) Elsie Widdowson Laboratory (closed Dec. 2018), Cambridge, UK.,NIHR BRC Nutritional Biomarker Laboratory, MRC Epidemiology Unit, University of Cambridge, Cambridge, CB2 0SL, UK
| | - Lorna Cox
- Medical Research Council (MRC) Elsie Widdowson Laboratory (closed Dec. 2018), Cambridge, UK.,NIHR BRC Nutritional Biomarker Laboratory, MRC Epidemiology Unit, University of Cambridge, Cambridge, CB2 0SL, UK
| | - Kimberly Robyak
- College of Medicine, Penn State University, Hershey, PA, 17033, USA
| | - Michael H Creer
- College of Medicine, Penn State University, Hershey, PA, 17033, USA
| | - Robert Fitzgerald
- Health Clinical Laboratories, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Michael W Clarke
- Metabolomics Australia, Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, WA, 6009, Australia
| | - Norma Breen
- Waters Technologies Ireland Ltd., Wexford, Y35 D431, Ireland
| | - Pierre Lukas
- Clinical Chemistry, University of Liège, CHU de Liège, B-4000, Liège, Belgium
| | - Étienne Cavalier
- Clinical Chemistry, University of Liège, CHU de Liège, B-4000, Liège, Belgium
| | - Christopher T Sempos
- Office of Dietary Supplements (ODS), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.,Vitamin D Standardization Program LLC, Havre de Grace, MD, 217078, USA
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