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Federica Saponaro Department of Surgical, Medical, Molecular and Critical Area Pathology, Laboratory of Biochemistry, University of Pisa, Pisa, Italy
Endocrinology Unit 2, University of Pisa, Pisa, Italy

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Alessandro Saba Department of Surgical, Medical, Molecular and Critical Area Pathology, Laboratory of Biochemistry, University of Pisa, Pisa, Italy
Laboratory of Clinical Pathology, University Hospital of Pisa, Pisa, Italy

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Sabina Frascarelli Department of Surgical, Medical, Molecular and Critical Area Pathology, Laboratory of Biochemistry, University of Pisa, Pisa, Italy

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Concetta Prontera Fondazione Toscana Gabriele Monasterio, Pisa, Italy

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Aldo Clerico Fondazione Toscana Gabriele Monasterio, Pisa, Italy

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Marco Scalese Institute of Clinical Physiology, National Council of Research, Pisa, Italy

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Maria Rita Sessa Laboratory of Endocrinology, University Hospital of Pisa, Pisa, Italy

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Filomena Cetani Endocrinology Unit 2, University of Pisa, Pisa, Italy

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Simona Borsari Endocrinology Unit 2, University of Pisa, Pisa, Italy

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Elena Pardi Endocrinology Unit 2, University of Pisa, Pisa, Italy

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Antonella Marvelli Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa, Italy

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Claudio Marcocci Endocrinology Unit 2, University of Pisa, Pisa, Italy

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Claudio Passino Fondazione Toscana Gabriele Monasterio, Pisa, Italy

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Riccardo Zucchi Department of Surgical, Medical, Molecular and Critical Area Pathology, Laboratory of Biochemistry, University of Pisa, Pisa, Italy

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and the majority of routine analyses are performed all over the world by immunoassay techniques, which allow non-chromatographic quantification of total 25 Hydroxyvitamin D (25OHD). In recent years, liquid chromatography-tandem mass spectrometry (LC

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-18-0207
Volume/Issue:
Volume 7: Issue 9
Open access
Paal Methlie Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway
Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Steinar Hustad Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Ralf Kellman Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Bjørg Almås Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Martina M Erichsen Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Eystein S Husebye Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway
Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Kristian Løvås Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway
Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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factors likely to slow its adoption. The development of simple, reliable, and cost- and labour-efficient methods is, therefore, important. Liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS) is a highly selective mode of detection. It

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-13-0023
Volume/Issue:
Volume 2: Issue 3
Open access
Magdalena Zgliczyńska Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Magdalena Ostrowska Department of Endocrinology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Kinga Żebrowska Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Iwona Szymusik Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Konrad Kowalski Masdiag Sp. z o.o., Stefana Żeromskiego, Warsaw, Poland

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Dorota Leszczyńska Department of Endocrinology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Katarzyna Kosińska-Kaczyńska Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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, interquartile range; LC-MS/MS, liquid chromatography with tandem mass spectrometry. Considering the CLIA method, patients with TP had statistically higher concentrations of 25(OH)D than patients with SP. However, regarding the results of LC

Article Type:
Research Article
Collections:
Reproduction
DOI:
https://doi.org/10.1530/EC-23-0201
Volume/Issue:
Volume 12: Issue 11
Open access
M P Schuijt Department of Laboratory Medicine, Slingeland Hospital, Doetinchem, The Netherlands
Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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C G J Sweep Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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R van der Steen Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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A J Olthaar Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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N M M L Stikkelbroeck Division of Endocrinology, Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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H A Ross Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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A E van Herwaarden Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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chromatography tandem mass spectrometry (ED-LC-MS/MS). LC-MS/MS enables the accurate, specific and matrix-independent measurement of testosterone with direct calibration. Equilibrium dialysis enables to separate the free- from protein-bound testosterone with

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-19-0110
Volume/Issue:
Volume 8: Issue 6
Open access
Run-Qing Xiong Department of Ultrasonic Imaging, Xiamen Medical College Affiliated Second Hospital, Fujian, China

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Yan-Ping Li Key Laboratory of Functional and Clinical Translational Medicine, Fujian Province University, Xiamen Medical College, Fujian, China

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Lu-Ping Lin Department of Endocrinology, Xiamen Medical College Affiliated Second Hospital, Fujian, China

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Jeng-Yuan Yao Key Laboratory of Functional and Clinical Translational Medicine, Fujian Province University, Xiamen Medical College, Fujian, China

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-segment changes in some leads, T-wave changes in some leads, and low voltage in the left chest lead. The purpose of this study was to examine the distinct metabolite profiles of plasma among these groups using liquid chromatography–mass spectrometry (LC-MS) to

Article Type:
Research Article
Collections:
Cardiovascular
DOI:
https://doi.org/10.1530/EC-23-0384
Volume/Issue:
Volume 13: Issue 3
Open access
Fidéline Bonnet-Serrano Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Hormonology Department, Cochin Hospital, Paris, France

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Maxime Barat Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Radiology Department, Cochin Hospital, Paris, France

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Anna Vaczlavik Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Anne Jouinot Inserm U1016-CNRS UMR8104, Paris, France

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Lucas Bouys Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Christelle Laguillier-Morizot Université Paris Cité, Paris, France
Hormonology Department, Cochin Hospital, Paris, France
INSERM, Physiopathologie et Pharmacotoxicologie Placentaire Humaine : Microbiote Pré & Post natal, Paris, France

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Corinne Zientek Hormonology Department, Cochin Hospital, Paris, France

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Catherine Simonneau Hormonology Department, Cochin Hospital, Paris, France

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Etienne Larger Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Diabetology Department, Cochin Hospital, Paris, France

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Laurence Guignat Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Lionel Groussin Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Guillaume Assié Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Jean Guibourdenche Université Paris Cité, Paris, France
Hormonology Department, Cochin Hospital, Paris, France
INSERM, Physiopathologie et Pharmacotoxicologie Placentaire Humaine : Microbiote Pré & Post natal, Paris, France

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Ioannis Nicolis Université Paris Cité, Paris, France
UR 7537 BioSTM, Paris, France

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Marie-Claude Menet Institut de Chimie Physique, Université Paris-Saclay-CNRS, UMR8000, Orsay, France

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Jérôme Bertherat Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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nitrogen. Dried extracts were further reconstituted in 100 µL of MeOH/water (50/50). Conditions and instrumentation for ultra-high-performance liquid chromatography-mass spectrometry Steroid profiles were characterized using LC-MS/MS. Ten

Article Type:
Research Article
Collections:
Adrenal
DOI:
https://doi.org/10.1530/EC-22-0063
Volume/Issue:
Volume 11: Issue 8
Open access
J A Tamblyn Institute of Metabolism and Systems Research (IMSR), College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
Birmingham Women’s Foundation Hospital, Edgbaston, Birmingham, UK
Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK

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C Jenkinson Birmingham Women’s Foundation Hospital, Edgbaston, Birmingham, UK

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D P Larner Birmingham Women’s Foundation Hospital, Edgbaston, Birmingham, UK

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M Hewison Institute of Metabolism and Systems Research (IMSR), College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK

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M D Kilby Institute of Metabolism and Systems Research (IMSR), College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
Birmingham Women’s Foundation Hospital, Edgbaston, Birmingham, UK
Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK

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stored at −80°C until use. Quantitative analysis of urinary de-conjugated vitamin D metabolites in spot urine samples was performed using a novel liquid chromatography tandem-mass spectrometry (LC–MS/MS) methodology. This was optimised from a method

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-17-0308
Volume/Issue:
Volume 7: Issue 1
Open access
Marcus Imamovic Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Nils Bäcklund Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Staffan Lundstedt Department of Medical Biosciences, Umeå University, Umeå, Sweden

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Göran Brattsand Department of Medical Biosciences, Umeå University, Umeå, Sweden

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Elisabeth Aardal Department of Clinical Chemistry and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden

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Tommy Olsson Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Per Dahlqvist Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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specificity ( 4 , 5 , 6 ). Cortisol analyses using liquid chromatography tandem mass spectrometry (LC-MS/MS) have eliminated the problems of cross-reactivity with exogenous steroids and cortisol metabolites often found with immunoassays ( 7 , 8 , 9 , 10

Article Type:
Research Article
Collections:
Adrenal
DOI:
https://doi.org/10.1530/EC-22-0324
Volume/Issue:
Volume 12: Issue 1
Open access
Thomas Reinehr Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany

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Alberto Sánchez-Guijo Steroid Research & Mass Spectrometry Unit, Division of Pediatric Endocrinology and Diabetology, Center of Child and Adolescent Medicine, Justus-Liebig-University Giessen, Giessen, Germany

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Nina Lass Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Witten, Germany

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Stefan A Wudy Steroid Research & Mass Spectrometry Unit, Division of Pediatric Endocrinology and Diabetology, Center of Child and Adolescent Medicine, Justus-Liebig-University Giessen, Giessen, Germany

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-of-the-art liquid chromatography–tandem mass spectrometry (LC–MS/MS) ( 20 ). This method can quantify 11 sulfated steroids simultaneously, providing a powerful tool to understand the sulfated steroidome in human blood ( 21 ). We hypothesized that sulfated steroids

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-18-0233
Volume/Issue:
Volume 7: Issue 10
Open access
Anela Blažević Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Anand M Iyer Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Marie-Louise F van Velthuysen Department of Pathology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Johannes Hofland Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Peter M van Koestveld Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Gaston J H Franssen Department of Surgery, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Richard A Feelders Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Marina Zajec Laboratory of Neuro-Oncology/Clinical & Cancer Proteomics, Department of Neurology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Theo M Luider Laboratory of Neuro-Oncology/Clinical & Cancer Proteomics, Department of Neurology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Wouter W de Herder Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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Leo J Hofland Department of Internal Medicine, Section Endocrinology, Erasmus University Medical Center and Erasmus MC Cancer Institute, Rotterdam, Netherlands

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involved in the tryptophan metabolism by liquid chromatography−mass spectrometry (LC-MS). Methods Sample selection Patients were included from the Erasmus Medical Center NET database. The study was performed retrospectively, and, according to

Article Type:
Research Article
Collections:
Hormones and Cancer
DOI:
https://doi.org/10.1530/EC-22-0020
Volume/Issue:
Volume 11: Issue 4
Open access