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Niek F Dirks Atalmedial Diagnostics Centre, Spaarne Gasthuis, Haarlem, The Netherlands
Department of Clinical Chemistry, Hematology and Immunology, Noordwest Ziekenhuis, Alkmaar, The Netherlands

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Etienne Cavalier Department of Clinical Chemistry, University of Liège, CHU de Liège, Liège, Belgium

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Annemieke C Heijboer Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Clinical Chemistry, Endocrine Laboratory, Boelelaan, Amsterdam, The Netherlands
Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam, The Netherlands
Amsterdam UMC location University of Amsterdam, Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands

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always the same for every method designed to measure vitamin D. Second, knowing the pitfalls of the used assay, most often an automated immunoassay or a liquid-chromatography coupled to tandem mass-spectrometry, is important for the interpretation of the

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-22-0269
Volume/Issue:
Volume 12: Issue 4
Open access
Josef Köhrle Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institut für Experimentelle Endokrinologie, Berlin, Germany

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Martina Rauner Department of Medicine III, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany
Center for Healthy Aging, Universitätsklinikum Dresden, Technische Universität Dresden, Dresden, Germany

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Susan A Lanham-New Department of Nutritional Sciences, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK

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decorated by the Nobel committee for his research on the composition of sterols and their connection to vitamins in 1928. The formal mass spectrometry confirmation of this UV-dependent non-enzymatic activation reaction in the skin was not, however, provided

Article Type:
Editorial
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-21-0609
Volume/Issue:
Volume 11: Issue 1
Open access
Behnaz Abiri Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Majid Valizadeh Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Amirhossein Ramezani Ahmadi Isfahan Endocrine and Metabolism Research Center, Isfahan University of Medical Sciences, Isfahan, Iran

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Shirin Amini Department of Nutrition, Shoushtar Faculty of Medical Sciences, Shoushtar, Iran

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Mohammad Nikoohemmat Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Faeze Abbaspour Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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Farhad Hosseinpanah Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

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) Küçükali ( 19 ), 2021 Turkey; NM Cross sectional 162 (84/78) F/M 12–18 84 obese children and 78 healthy children 25(OH)D: Liquid chromatography–tandem mass spectrometry with a commercial kit. PTH: colorimetric method using ready-made kits

Article Type:
Research Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-23-0394
Volume/Issue:
Volume 13: Issue 2
Open access
Maria Luisa Brandi Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
Fondazione Italiana Ricerca sulle Malattie dell’Osso (FIRMO Onlus), Florence, Italy

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Stefania Bandinelli Geriatric Unit, Azienda Sanitaria Toscana Centro, Florence, Italy

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Teresa Iantomasi Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Francesca Giusti Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Eleonora Talluri Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Giovanna Sini Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Fabrizio Nannipieri Clinical Research, Abiogen Pharma, Pisa, Italy

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Santina Battaglia Clinical Research, Abiogen Pharma, Pisa, Italy

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Riccardo Giusti Clinical Research, Abiogen Pharma, Pisa, Italy

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Colin Gerard Egan CE Medical Writing SRLS, Pisa, Italy

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Luigi Ferrucci Longitudinal Study Section, Translation Gerontology Branch, National Institute on Aging, Baltimore, Maryland, USA

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to a reference procedure (isotope dilution mass spectrometry) and automatized on a Cobas 8000. Serum VDBP was measured by enzyme-linked immuno assay method (R&D Systems). BPA analysis was performed on urine samples using the HPLC/mass spectrometry by

Article Type:
Research Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-21-0571
Volume/Issue:
Volume 11: Issue 3
Open access
Barbara J Boucher The Blizard Institute, Queen Mary University of London, London, UK

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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

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-22-0234
Volume/Issue:
Volume 11: Issue 12
Open access
Shu-Meng Hu Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Yang-Juan Bai Department of Laboratory Medicine/Research Centre of Clinical Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Ya-Mei Li Department of Laboratory Medicine/Research Centre of Clinical Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Ye Tao Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Xian-Ding Wang Department of Urology/Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Tao Lin Department of Urology/Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Lan-Lan Wang Department of Laboratory Medicine/Research Centre of Clinical Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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Yun-Ying Shi Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan, China

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commercial kits. The serum concentration of 25 hydroxyvitamin D (25(OH)D) was measured by HPLC/mass spectrometry. Cardiovascular events were obtained by phone calls to patients’ homes and by reviewing the hospital records. In the study, we defined

Article Type:
Research Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-22-0123
Volume/Issue:
Volume 11: Issue 8
Open access
Glenville Jones Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario, Canada

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identification of the metabolite as 1α,25-(OH) 2 D 3 with mass spectrometry. Chemically synthesized 1,25-(OH) 2 D 3 was first produced by Semmler et al. ( 43 ) and made commercially by a group headed by Dr Milan Uskokovic at Hoffmann-La Roche in the early

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-21-0594
Volume/Issue:
Volume 11: Issue 4
Open access
Marcela Moraes Mendes Department of Nutrition, Faculty of Health Sciences, University of Brasília, Distrito Federal, Brazil
Department of Nutrition, Institute of Life Sciences, Federal University of Juiz de Fora, Governador Valadares, Minas Gerais, Brazil
Department of Nutrition, Faculty of Health and Medical Sciences, University of Surrey, University of Surrey, Guildford, UK

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Patricia Borges Botelho Department of Nutrition, Faculty of Health Sciences, University of Brasília, Distrito Federal, Brazil

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Helena Ribeiro Department of Environmental Health, Faculty of Public Health, University of São Paulo, São Paulo, Brazil

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, protein binding assays, high-performance liquid chromatography (HPLC), and liquid chromatography-tandem mass spectrometry (LC-MS/MS) ( 15 , 52 , 53 ). This variety of methods may partially explain the variability of results. However, there is a consensus

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-21-0596
Volume/Issue:
Volume 11: Issue 10
Open access
Kevin D Cashman Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland

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-off representing an increased risk of vitamin D deficiency ( 1 ). The US survey used a standardised liquid chromatography with tandem mass spectrometry (LC-MS/MS) methodology for measurement of 25(OH)D, whereas the Canadian survey used an immunoassay-based method

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-21-0282
Volume/Issue:
Volume 11: Issue 1
Open access
Jane Fletcher Nutrition Nurses, University Hospitals Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Edgbaston, Birmingham, UK
School of Nursing, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, UK

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Emma L Bishop Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK

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Stephanie R Harrison Leeds Institute of Rheumatic and Musculoskeletal Medicine, Chapel Allerton Hospital, Leeds, UK

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Amelia Swift School of Nursing, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, UK

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Sheldon C Cooper Gastroenterology Department, University Hospitals Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Edgbaston, Birmingham, UK

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Sarah K Dimeloe Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK

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Karim Raza Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK

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Martin Hewison Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK

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DJ . Circulating conjugated and unconjugated vitamin D metabolite measurements by liquid chromatography mass spectrometry . Journal of Clinical Endocrinology and Metabolism 2022 107 435 – 449 . ( https://doi.org/10.1210/clinem/dgab708 ) 3

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-21-0554
Volume/Issue:
Volume 11: Issue 3
Open access