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Cavalier E, Makris K, Heijboer AC, Herrmann M, Souberbielle JC. Vitamin D: Analytical Advances, Clinical Impact, and Ongoing Debates on Health Perspectives. Clin Chem 2024:hvae056. [PMID: 38712647 DOI: 10.1093/clinchem/hvae056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 03/19/2024] [Indexed: 05/08/2024]
Abstract
BACKGROUND Vitamin D, acknowledged since the 1930s for its role in preventing rickets, gained additional prominence in relation to fragility fracture prevention in the late 1980s. From the early 2000s, connections between vitamin D deficiency and extra-skeletal pathologies emerged, alongside increased awareness of widespread deficits. This prompted crucial debates on optimal serum concentrations, expected to conclude when the outcomes of high-dose supplementation randomized controlled trials were available. Skepticism arose with inconclusive results from these trials. CONTENT This review begins with an exploration of vitamin D metabolism, followed by a detailed description of the measurement of vitamin D metabolites and the crucial role of standardization. Subsequent sections focus on the association of vitamin D with bone health and explore the extra-skeletal effects. The review concludes with a comprehensive discussion on the definition of vitamin D status and its implications for supplementation. SUMMARY Despite standardization efforts, assay variations and challenges still exist, especially in specific patient groups. Vitamin D supplementation has a significant impact on bone metabolism and optimal vitamin D status improves the efficacy of antiresorptive drugs such as bisphosphonates. The extra-skeletal effects of vitamin D remain debated, but may include potential benefits in conditions such as respiratory infections and cancer mortality, particularly in deficient individuals. The definition of vitamin D sufficiency is nuanced, especially when variations in population groups and analytical methods are taken into account. Despite ongoing debates and recent mega-trials tempering enthusiasm, vitamin D remains a complex and essential element in human health. Further research is needed to clarify its role in various health outcomes and guide supplementation strategies.
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Affiliation(s)
- Etienne Cavalier
- Department of Clinical Chemistry, University of Liège, CIRM, CHU de Liège, Liège, Belgium
| | | | - Annemieke C Heijboer
- Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam Gastroenterology & Metabolism, Vrije Universiteit Amsterdam and University of Amsterdam, Amsterdam UMC, Amsterdam, the Netherlands
| | - Markus Herrmann
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
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Matejek T, Zapletalova B, Stranik J, Zaloudkova L, Palicka V. Reference values of parathyroid hormone in very low birth weight infants. Ann Clin Biochem 2024:45632241245942. [PMID: 38520177 DOI: 10.1177/00045632241245942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2024]
Abstract
PURPOSE The primary goal was to estimate reference values of parathyroid hormone (PTH) in very low birth weight infants without severe neonatal morbidity. A secondary objective was to assess the relationship between PTH serum levels and selected laboratory markers of bone metabolism. METHODS Ninety two infants with birth weight less than 1500 g met the inclusion criteria of the study. Serum levels of PTH, 25-hydroxyvitamin-D [25(OH)D], C3-epi-25(OH)D, total calcium, phosphorus, and alkaline phosphatase, and urinary levels of calcium, phosphorus, and creatinine were examined on day 14 and subsequently every 2 weeks until discharge. RESULTS Of the total 167 serum samples examined for PTH levels in infants without 25(OH)D deficiency the estimated range was 0.9-11.9 pmol/l (8.5-112.3 pg/mL). During the first month, no statistically significant correlation was observed between PTH level and that of 25(OH)D, C3-epimers of 25(OH)D, S-Ca, S-P, or ALP, nor with urinary excretion of calcium and phosphorus. From the second month of life, there was a moderately significant correlation between PTH and 25(OH)D (Rho = -0.40, P =< .001), between PTH and calcium/creatinine ratio (Rho = -0.56, P = < .001), and between PTH and phosphorus/creatinine ratio (Rho = 0.51, P = < .001). CONCLUSIONS The physiological range for PTH levels for preterm neonates without 25(OH)D deficiency was estimated as 0.9-11.9 pmol/l (8.5-112.3 pg/mL). It seems that elevation of serum PTH above this range can be considered as hyperparathyroidism in very low birth weight infants.
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Affiliation(s)
- Tomas Matejek
- Department of Paediatrics, Charles University in Prague, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Bara Zapletalova
- Department of Paediatrics, Charles University in Prague, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jaroslav Stranik
- Department of Obstetrics and Gynecology, Charles University in Prague, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Lenka Zaloudkova
- Institute of Clinical Biochemistry and Diagnostics, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Vladimir Palicka
- Institute of Clinical Biochemistry and Diagnostics, Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
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Cavalier E, Farré-Segura J, Lukas P, Gendebien AS, Peeters S, Massonnet P, Le Goff C, Bouquegneau A, Souberbielle JC, Delatour V, Delanaye P. Unveiling a new era with liquid chromatography coupled with mass spectrometry to enhance parathyroid hormone measurement in patients with chronic kidney disease. Kidney Int 2024; 105:338-346. [PMID: 37918791 DOI: 10.1016/j.kint.2023.09.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 11/04/2023]
Abstract
Precise determination of circulating parathyroid hormone (PTH) concentration is crucial to diagnose and manage various disease conditions, including the chronic kidney disease-mineral and bone disorder. However, the lack of standardization in PTH assays is challenging for clinicians, potentially leading to medical errors because the different assays do not provide equivalent results and use different reference ranges. Here, we aimed to evaluate the impact of recalibrating PTH immunoassays by means of a recently developed LC-MS/MS method as the reference. Utilizing a large panel of pooled plasma samples with PTH concentrations determined by the LC-MS/MS method calibrated with the World Health Organization (WHO) 95/646 International Standard, five PTH immunoassays were recalibrated. The robustness of this standardization was evaluated over time using different sets of samples. The recalibration successfully reduced inter-assay variability with harmonization of PTH measurements across different assays. By recalibrating the assays based on the WHO 95/646 International Standard, we demonstrated the feasibility for standardizing PTH measurement results and adopting common reference ranges for PTH assays, facilitating a more consistent interpretation of PTH values. The recalibration process aligns PTH results obtained from various immunoassays with the LC-MS/MS method, providing more consistent and reliable measurements. Thus, establishing true standardization across all PTH assays is crucial to ensure consistent interpretation and clinical decision-making.
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Affiliation(s)
- Etienne Cavalier
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium.
| | - Jordi Farré-Segura
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Pierre Lukas
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Anne-Sophie Gendebien
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Stéphanie Peeters
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Philippe Massonnet
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Caroline Le Goff
- Department of Clinical Chemistry, University of Liège, CIRM, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Antoine Bouquegneau
- Department of Nephrology, Dialysis and Transplantation, CHU de Liège, Liège, Belgium
| | | | - Vincent Delatour
- Department of Biomedical and Organic Chemistry, Laboratoire National de Métrologie et d'Essais (LNE), Paris, France
| | - Pierre Delanaye
- Department of Nephrology, Dialysis and Transplantation, CHU de Liège, Liège, Belgium; Department of Nephrology-Dialysis-Apheresis, Hôpital Universitaire Carémeau, Nîmes, France
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Kalaria T, Lawson AJ, Duffy J, Agravatt A, Harris S, Ford C, Gama R, Webster C, Geberhiwot T. Age-specific Reference Intervals of Abbott Intact PTH-Potential Impacts on Clinical Care. J Endocr Soc 2024; 8:bvae004. [PMID: 38292595 PMCID: PMC10825829 DOI: 10.1210/jendso/bvae004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Indexed: 02/01/2024] Open
Abstract
Background PTH assays are not standardized; therefore, method-specific PTH reference intervals are required for interpretation of results. PTH increases with age in adults but age-related reference intervals for the Abbott intact PTH (iPTH) assay are not available. Methods Deidentified serum PTH results from September 2015 to November 2022 were retrieved from the laboratory information system of a laboratory serving a cosmopolitan population in central-west England for individuals aged 18 years and older if the estimated glomerular filtration rate was ≥60 mL/min, serum 25-hydroxyvitamin D was >50 nmol/L, and serum albumin-adjusted calcium and serum phosphate were within reference intervals. Age-specific reference intervals for Abbott iPTH were derived by an indirect method using the refineR algorithm. Results PTH increased with age and correlated with age when controlled for 25-hydroxyvitamin D, estimated glomerular filtration rate, and adjusted calcium (r = 0.093, P < .001). The iPTH age-specific reference intervals for 4 age partitions of 18 to 45 years, 46 to 60 years, 61 to 80 years, and 81 to 95 years were 1.6 to 8.6 pmol/L, 1.8 to 9.5 pmol/L, 2.0 to 11.3 pmol/L, and 2.3 to 12.3 pmol/L, respectively. PTH was higher in women compared with men (P < .001). Sex-specific age-related reference intervals could not be derived because of the limited sample size. Conclusion Age-specific Abbott iPTH reference intervals were derived. Application of age-specific reference intervals will impact the diagnosis and management of normocalcemic hyperparathyroidism, based on current definitions, and secondary hyperparathyroidism. Additional studies are required to clarify the effect of sex and ethnicity on PTH.
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Affiliation(s)
- Tejas Kalaria
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Alexander J Lawson
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Joanne Duffy
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | | | - Steve Harris
- Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - Clare Ford
- Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - Rousseau Gama
- Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
- School of Medicine and Clinical Practice, University of Wolverhampton, Wolverhampton, WV1 1LY, UK
| | - Craig Webster
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Tarekegn Geberhiwot
- Centre for Endocrinology, Diabetes, and Metabolism, Queen Elizabeth Hospital, Birmingham, B15 2TH, UK
- Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, B15 2TT, UK
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Gong M, Wang K, Sun H, Wang K, Zhou Y, Cong Y, Deng X, Mao Y. Threshold of 25(OH)D and consequently adjusted parathyroid hormone reference intervals: data mining for relationship between vitamin D and parathyroid hormone. J Endocrinol Invest 2023; 46:2067-2077. [PMID: 36920734 PMCID: PMC10514164 DOI: 10.1007/s40618-023-02057-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 03/02/2023] [Indexed: 03/16/2023]
Abstract
PURPOSE By recruiting reference population, we aimed to (1): estimate the 25(OH)D threshold that maximally inhibits the PTH, which can be defined as the cutoff value for vitamin D sufficiency; (2) establish the PTH reference interval (RI) in population with sufficient vitamin D. METHODS Study data were retrieved from LIS (Laboratory Information Management System) under literature suggested criteria, and outliers were excluded using Tukey fence method. Locally weighted regression (LOESS) and segmented regression (SR) were conducted to estimate the threshold of 25(OH)D. Multivariate linear regression was performed to evaluate the associations between PTH concentration and variables including 25(OH)D, gender, age, estimated glomerular filtration rate (EGFR), body mass index (BMI), albumin-adjusted serum calcium (aCa), serum phosphate(P), serum magnesium(Mg), and blood collection season. Z test was adopted to evaluate whether the reference interval should be stratified by determinants such as age and gender. RESULTS A total of 64,979 apparently healthy subjects were recruited in this study, with median (Q1, Q3) 25(OH)D of 45.33 (36.15, 57.50) nmol/L and median (Q1, Q3) PTH of 42.19 (34.24, 52.20) ng/L. The segmented regression determined the 25(OH)D threshold of 55 nmol/L above which PTH would somewhat plateau and of 22 nmol/L below which PTH would rise steeply. Multivariate linear regression suggested that gender, EGFR, and BMI were independently associated with PTH concentrations. The PTH RI was calculated as 22.17-72.72 ng/L for subjects with 25(OH)D ≥ 55 nmol/L with no necessity of stratification according to gender, age, menopausal status nor season. CONCLUSION This study reported 25(OH)D thresholds of vitamin D sufficiency at 55 nmol/L and vitamin D deficiency at 22 nmol/L, and consequently established PTH RIs in subjects with sufficient vitamin D for northern China population for the first time.
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Affiliation(s)
- M Gong
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - K Wang
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - H Sun
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - K Wang
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Y Zhou
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Y Cong
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - X Deng
- Department of Laboratory Medicine, Second Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing, China.
| | - Y Mao
- Department of Laboratory Medicine, Fifth Medical Center, Chinese PLA General Hospital, Beijing, China.
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Kalaria T, Fenn J, Sanders A, Yates A, Duff C, Ashby H, Mohammed P, Ford C, Gama R. The Diagnosis of Normocalcaemic Hyperparathyroidism is Strikingly Dissimilar Using Different Commercial Laboratory Assays. Horm Metab Res 2022; 54:429-434. [PMID: 35835142 DOI: 10.1055/a-1856-4900] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We assessed the impact of intact parathyroid hormone (iPTH) and adjusted calcium analyses on Abbott, Roche and Siemens analytical platforms in the diagnosis of normocalcaemic primary hyperparathyroidism (NCPHPT). These assays are used by over 85% of clinical laboratories in the UK. Over five months, consecutive serum samples from outpatients with NCPHPT in the laboratory with Abbott assays were identified, aliquoted and stored at -80°C. Frozen aliquots were transported monthly to the other two laboratories. After thawing, samples were mixed and analysed immediately for calcium, albumin and iPTH in the laboratories with Abbott, Roche and Siemens analytical platforms. Adjusted calcium was calculated using the equation used in the respective laboratory. Diagnostic concordance of iPTH and adjusted calcium were assessed using manufacturer-provided assay-specific reference intervals and the pathology harmony reference interval respectively. Fifty-five patients with NCPHPT were identified using Abbott assays. Of these, 16 (29.1%) and 11 (20.0%) had NCPHPT, 9 (16.4%) and 13 (23.6%) had hypercalcaemic primary hyperparathyroidism, and 30 (54.6%) and 31 (56.4%) patients had normal results when analysed in laboratories with Roche and Siemens assays, respectively. The diagnosis of NCPHPT was strikingly different depending on the commercial assay used. There is a pressing need for iPTH assay harmonisation and robust reference intervals. Reference intervals may become invalid if an assay drifts, as exemplified by adjusted calcium in this study.
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Affiliation(s)
- Tejas Kalaria
- Clinical Biochemistry, New Cross Hospital, Black Country Pathology Services, Wolverhampton, United Kingdom of Great Britain and Northern Ireland
| | - Jonathan Fenn
- Clinical Biochemistry, New Cross Hospital, Black Country Pathology Services, Wolverhampton, United Kingdom of Great Britain and Northern Ireland
| | - Anna Sanders
- Clinical Biochemistry, Russells Hall Hospital, Black Country Pathology Services, Dudley, United Kingdom of Great Britain and Northern Ireland
| | - Alexandra Yates
- Clinical Biochemistry, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, United Kingdom of Great Britain and Northern Ireland
| | - Christopher Duff
- Clinical Biochemistry, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, United Kingdom of Great Britain and Northern Ireland
- School of Primary, Community & Social Care, Faculty of Medicine & Health Sciences, Keele University, Stoke-on-Trent, United Kingdom of Great Britain and Northern Ireland
| | - Helen Ashby
- Clinical Biochemistry, Russells Hall Hospital, Black Country Pathology Services, Dudley, United Kingdom of Great Britain and Northern Ireland
| | - Pervaz Mohammed
- Clinical Biochemistry, Russells Hall Hospital, Black Country Pathology Services, Dudley, United Kingdom of Great Britain and Northern Ireland
| | - Clare Ford
- Clinical Biochemistry, New Cross Hospital, Black Country Pathology Services, Wolverhampton, United Kingdom of Great Britain and Northern Ireland
| | - Rousseau Gama
- Clinical Biochemistry, New Cross Hospital, Black Country Pathology Services, Wolverhampton, United Kingdom of Great Britain and Northern Ireland
- School of Medicine and Clinical Practice, University of Wolverhampton, Wolverhampton, United Kingdom of Great Britain and Northern Ireland
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Ladang A, Rousselle O, Huyghebaert L, Bekaert AC, Kovacs S, Le Goff C, Cavalier E. Parathormone, bone alkaline phosphatase and 25-hydroxyvitamin D status in a large cohort of 1200 children and teenagers. Acta Clin Belg 2022; 77:4-9. [PMID: 32441564 DOI: 10.1080/17843286.2020.1769285] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Objectives: 25-Hydroxyvitamin D (25(OH)D), parathyroid hormone (PTH) and bone alkaline phosphatase (BALP) are biomarkers of calcium/phosphate metabolism and bone turnover. Although vitamin D deficiency is a well-known cause of secondary hyperparathyroidism, few studies have considered vitamin D status when establishing reference ranges. In this study, we report PTH levels according to the vitamin D status and BALP levels in a large cohort of 1200 children. Additionally, we provide PTH pediatric reference values according to 25(OH)D status as well as BALP pediatric reference ranges.Methods: Serum samples from 1200 children (equally distributed from 5 months to 20 years old) who underwent blood sampling for allergy exploration were used to quantify 25(OH)D, PTH and BALP.Results: The percentage of vitamin D deficient children (<20 ng/ml) progressively increased during childhood starting from 7% in the 0 to 2 year-old subgroup to a mean of at least 50% among teenagers. PTH levels inversely mirrored 25(OH)D concentrations for all age and gender subgroups, and 25(OH)D deficient subgroups presented higher PTH levels than their non-deficient counterparts. In the non-deficient 25(OH)D population, PTH levels were the highest at 11 years old for girls and 14 years old for boys. BALP results were slightly increased during childhood and showed a constant decrease during teenage years starting from 12 years old for girls and 14 years old for boys.Conclusion: Our results highlight the inverse relationship between PTH and 25(OH)D in children and the need for a well characterized 25(OH)D population to establish pediatric reference ranges for PTH.
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Affiliation(s)
- Aurélie Ladang
- Clinical Chemistry Department, CHU De Liège, Liège, Belgium
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Alabajos-Cea A, Herrero-Manley L, Suso-Martí L, Viosca-Herrero E, Cuenca-Martínez F, Varangot-Reille C, Blanco-Díaz M, Calatayud J, Casaña J. The Role of Vitamin D in Early Knee Osteoarthritis and Its Relationship with Their Physical and Psychological Status. Nutrients 2021; 13:nu13114035. [PMID: 34836290 PMCID: PMC8622912 DOI: 10.3390/nu13114035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/20/2021] [Accepted: 09/25/2021] [Indexed: 12/17/2022] Open
Abstract
Osteoarthritis (OA) is a common joint condition and one of the greatest causes of disability worldwide. The role of vitamin D in the origin and development of the disease is not clear, although it could have important implications for diagnosis and treatment. For this proposal, a cross-sectional study with a non-probabilistic sample was performed. In total, 48 with early osteoarthritis (EOA) and 48 matched controls were selected, and serum 25(OH)D and parathyroid hormone (PTH) levels were analyzed. In addition, physical and psychological variables were measured to establish their relationship with vitamin D levels. Patients with EOA showed lower levels (22.3 ± 7.3 ng/mL) in comparison to matched controls (29.31 ± 9.2 ng/mL). A statistically significant higher number (Chi-squared = 8.525; p = 0.004) of patients with EOA had deficiency levels (<20 ng/mL) compared to the control group. Patients with lower vitamin D levels showed higher levels of pain intensity, disability, and anxiety, as well as poorer values for sit-to-stand, walking speed, and social participation. Correlation analysis showed a relationship between serum 25(OH)D, PTH and pain intensity, and social participation. These results highlight the relevance of vitamin D in the early diagnosis and prevention of EOA.
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Affiliation(s)
- Ana Alabajos-Cea
- Servicio de Medicina Física y Rehabilitación, Hospital La Fe, 46026 Valencia, Spain; (A.A.-C.); (L.H.-M.); (E.V.-H.)
- Grupo de Investigación en Medicina Física y Rehabilitación, Instituto de Investigación Sanitaria La Fe (IISLAFE), 46026 Valencia, Spain
| | - Luz Herrero-Manley
- Servicio de Medicina Física y Rehabilitación, Hospital La Fe, 46026 Valencia, Spain; (A.A.-C.); (L.H.-M.); (E.V.-H.)
| | - Luis Suso-Martí
- Exercise Intervention for Health Research Group (EXINH-RG), Department of Physiotherapy, University of Valencia, 46026 Valencia, Spain; (F.C.-M.); (C.V.-R.); (J.C.); (J.C.)
- Correspondence:
| | - Enrique Viosca-Herrero
- Servicio de Medicina Física y Rehabilitación, Hospital La Fe, 46026 Valencia, Spain; (A.A.-C.); (L.H.-M.); (E.V.-H.)
- Grupo de Investigación en Medicina Física y Rehabilitación, Instituto de Investigación Sanitaria La Fe (IISLAFE), 46026 Valencia, Spain
| | - Ferran Cuenca-Martínez
- Exercise Intervention for Health Research Group (EXINH-RG), Department of Physiotherapy, University of Valencia, 46026 Valencia, Spain; (F.C.-M.); (C.V.-R.); (J.C.); (J.C.)
| | - Clovis Varangot-Reille
- Exercise Intervention for Health Research Group (EXINH-RG), Department of Physiotherapy, University of Valencia, 46026 Valencia, Spain; (F.C.-M.); (C.V.-R.); (J.C.); (J.C.)
| | - María Blanco-Díaz
- Surgery and Medical Surgical Specialities Department, Faculty of Medicine and Health Sciences, University of Oviedo, 33006 Oviedo, Spain;
| | - Joaquín Calatayud
- Exercise Intervention for Health Research Group (EXINH-RG), Department of Physiotherapy, University of Valencia, 46026 Valencia, Spain; (F.C.-M.); (C.V.-R.); (J.C.); (J.C.)
| | - José Casaña
- Exercise Intervention for Health Research Group (EXINH-RG), Department of Physiotherapy, University of Valencia, 46026 Valencia, Spain; (F.C.-M.); (C.V.-R.); (J.C.); (J.C.)
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Vissing Landgrebe A, Asp Vonsild Lund M, Lausten-Thomsen U, Frithioff-Bøjsøe C, Esmann Fonvig C, Lind Plesner J, Aas Holm L, Jespersen T, Hansen T, Christian Holm J. Population-based pediatric reference values for serum parathyroid hormone, vitamin D, calcium, and phosphate in Danish/North-European white children and adolescents. Clin Chim Acta 2021; 523:483-490. [PMID: 34695445 DOI: 10.1016/j.cca.2021.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 10/16/2021] [Accepted: 10/20/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Parathyroid hormone (PTH) and vitamin D are essential hormones in bone metabolism, especially during pediatric growth. Vitamin D insufficiency is often asymptomatic and is prevalent in high-latitude countries. METHODS In a Danish population-based cohort of 2211 6-18-year-olds, sex- and age-specific pediatric reference values for fasting concentrations of intact serum PTH, vitamin D (25-hydroxycholecalciferol, 25-OH-D), total calcium, and phosphate were generated in accordance with Clinical and Laboratory Standards Institute (CLSI) EP28-A3c guidelines. The effect of season on these biomarkers of bone metabolism was evaluated. RESULTS In boys, PTH concentrations increased with age, while the vitamin D and phosphate concentrations decreased (all p < .001). In girls, a peak in PTH concentrations and a nadir in vitamin D concentrations were observed in the 10-14-year-olds (both p < .001). Calcium and phosphate decreased with age for both sexes (girls: both p < .001; boys calcium: p < .05, boys phosphate: p < .001). Vitamin D was 20% lower in winter than summer for both sexes (both p < .001). Individuals with vitamin D sufficiency (25-OH-D > 50 nmol/L) exhibited a 5% lower level of PTH compared to the whole sample population (p < .001). CONCLUSION The concentrations of PTH, vitamin D, calcium, and phosphate vary during childhood and adolescence, and is dependent on sex and season. These factors should be considered when screening for and treating imbalances in bone metabolism.
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Affiliation(s)
- Ann Vissing Landgrebe
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark; Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Morten Asp Vonsild Lund
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark; Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ulrik Lausten-Thomsen
- Department of Neonatology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Christine Frithioff-Bøjsøe
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark; The Novo Nordisk Foundation Center for Basic Metabolic Research, Section for Metabolic Genetics, University of Copenhagen, Copenhagen, Denmark
| | - Cilius Esmann Fonvig
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark; The Novo Nordisk Foundation Center for Basic Metabolic Research, Section for Metabolic Genetics, University of Copenhagen, Copenhagen, Denmark; Department of Pediatrics, Kolding Hospital a part of Lillebælt Hospital, Kolding, Denmark
| | - Johanne Lind Plesner
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark
| | - Louise Aas Holm
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark; The Novo Nordisk Foundation Center for Basic Metabolic Research, Section for Metabolic Genetics, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Jespersen
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Torben Hansen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section for Metabolic Genetics, University of Copenhagen, Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
| | - Jens Christian Holm
- The Children's Obesity Clinic, Accredited European Centre for Obesity Management, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark; The Novo Nordisk Foundation Center for Basic Metabolic Research, Section for Metabolic Genetics, University of Copenhagen, Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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Papakitsou E, Paspati I, Rizou S, Lyritis GP. Bone metabolism subgroups identified as hip fracture patients via clustering. Hormones (Athens) 2021; 20:545-555. [PMID: 33619705 DOI: 10.1007/s42000-021-00276-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 01/27/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE The aim of the study was to describe the bone metabolism status that underlies a hip fracture. METHODS Estimated glomerular filtration rate (e-GFR), calcium (Ca), phosphorus (P), total (ALP) and bone specific alkaline phosphatase (b-ALP), intact parathyroid hormone (i-PTH), 25-hydroxy-vitamin D (25OHD), total procollagen type I amino-terminal propeptide (PINP), and N-terminal peptide of collagen I (NTx), measured at admission in 272 hip fracture patients, were ex post analyzed by K-means clustering and principal component analysis and were evaluated by a clinician. RESULTS Four components, mainly consisting of b-ALP, PINP, ALP, and NTx; e-GFR and P; i-PTH and 25OHD; and Ca explained about 70% of the variability. A total of 184 patients clustered around a centroid (A) with low 25OHD (13.2 ng/ml), well-preserved kidney function (e-GFR=67.19 ml/min/1.73m2), normal Ca, P, i-PTH and bone markers, with the exception of slightly increased NTx (24.82nMBCE). Cluster B (n=70) had increased i-PTH (93.38 pg/ml), moderately decreased e-GFR, very low 25OHD (8.68 ng/dl), and high bone turnover (b-ALP 28.46 U/L, PINP 69.87 ng/ml, NTx 31.3nMBCE). Cluster C (n=17) also had hyperparathyroidism (80.35 pg/ml) and hypovitaminosis D (9.15 ng/ml), low e-GFR(48.89 ml/min/1.73m2), and notably high ALP (173 U/L) and bone markers (b-ALP 44.64 U/L, PINP 186.98 ng/ml, NTx 38.28nMBCE). According to the clinician, 62 cases clearly had secondary hyperparathyroidism. CONCLUSIONS Based on serum measurements, the dominant patterns of bone metabolism were normal bone turnover with high normal NTx, and secondary hyperparathyroidism related to chronic kidney disease and hypovitaminosis D. The bone formation markers, e-GFR, NTx, and P composed the most important factors.
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11
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Minisola S, Pepe J, Cipriani C. Measuring serum calcium: Total, albumin-adjusted or ionized? Clin Endocrinol (Oxf) 2021; 95:267-268. [PMID: 33190303 DOI: 10.1111/cen.14362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/24/2020] [Accepted: 10/28/2020] [Indexed: 11/29/2022]
Affiliation(s)
- Salvatore Minisola
- Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences (SCIAC), Sapienza' Rome University, Rome, Italy
| | - Jessica Pepe
- Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences (SCIAC), Sapienza' Rome University, Rome, Italy
| | - Cristiana Cipriani
- Department of Clinical, Internal, Anesthesiological and Cardiovascular Sciences (SCIAC), Sapienza' Rome University, Rome, Italy
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12
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Malla P, Liao HP, Liu CH, Wu WC. Electrochemical immunoassay for serum parathyroid hormone using screen-printed carbon electrode and magnetic beads. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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13
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Minieri M, Leoni BD, Bellincampi L, Bajo D, Agnoli A, De Angelis AM, Pieri M, Equitani F, Rossi V, Valente F, Pignalosa S, Terrinoni A, Bernardini S. Serum iPTH range in a reference population: From an integrated approach to vitamin D prevalence impact evaluation. Clin Chim Acta 2021; 521:1-8. [PMID: 34111419 DOI: 10.1016/j.cca.2021.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 01/24/2023]
Abstract
BACKGROUND The iPTH upper reference limit (URL) reported by our laboratory provider (Abbott Laboratories) at Tor Vergata University Hospital was evaluated by internal verification procedures as not representative of our population and resulting as underestimated. In this study, a new reference interval has been investigated and established by comparing a direct and an indirect method based on a statistical reduction from results stored in the laboratory database. METHODS For reference interval calculation from the healthy population, we analyzed a cohort of 100 blood donors (84% males and 16% females) screened with no bone-related and malabsorption diseases. We analyzed a cohort of 495 patients retrieved from more than 800 iPTH results by excluding subjects with pathological measurement for calcium, phosphorus, and creatinine for the reference interval evaluation. Patients with vitamin D results were included in the analysis. Vitamin D sufficiency status during the period from January to September 2020 was also evaluated by investigating 3,050 patients. RESULTS The iPTH reference interval of a healthy blood donor population was measured as 25.2-109.1 pg/mL (2.7-11.6 pmol/L) at 2.5 and 97.5 distribution percentile. The iPTH reference interval from data stored in the laboratory database was 19.3-112.5 pg/mL (2.0-11.9 pmol/L). Furthermore, 60% of the whole population had prevalently insufficient vitamin D concentration (<30 ng/dL; <75 nmol/L). The impact of vitamin D concentration on the iPTH reference interval was measured for insufficient vitamin D (<30 ng/dL; <75 nmol/L) as 15.2-127.7 pg/mL (1.6-13.5 pmol/L), desirable vitamin D (30-40 ng/ml; 75-100 nmol/L) as 25.6-105 pg/mL (2.7-10.7 pmol/L) and optimal vitamin D (>40 ng/ml; >100 nmol/L) as 26.2-89.2 pg/mL (2.8-9.4 pmol/L), respectively. CONCLUSIONS The URL reported in manufacturer datasheets likely refers to a normal population with non-pathological vitamin D levels. On the contrary, the considered population was mostly vitamin D insufficient, resulting in a URL shift. On this basis, we suggest describing in medical reports the iPTH range for vitamin D deficiency for diagnosis of primary hyperparathyroidism even when a specific vitamin D request is lacking. On the other hand, reporting optimal vitamin D-based iPTH reference interval could be clinically relevant in supplemented patients as a marker of treatment efficacy.
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Affiliation(s)
- Marilena Minieri
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy; Unit of Laboratory Medicine, Tor Vergata University Hospital, Rome, Italy.
| | | | | | - Daniela Bajo
- Unit of Laboratory Medicine, Tor Vergata University Hospital, Rome, Italy
| | - Alessia Agnoli
- Unit of Laboratory Medicine, Tor Vergata University Hospital, Rome, Italy
| | | | - Massimo Pieri
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Francesco Equitani
- Department of Transfusion Medicine, Santa Maria Goretti Hospital, AUSL Latina, Italy
| | | | | | | | - Alessandro Terrinoni
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Sergio Bernardini
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy; Unit of Laboratory Medicine, Tor Vergata University Hospital, Rome, Italy
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Cavalier E, Vasikaran S, Bhattoa HP, Heijboer AC, Makris K, Ulmer CZ. The path to the standardization of PTH: Is this a realistic possibility? a position paper of the IFCC C-BM. Clin Chim Acta 2021; 515:44-51. [PMID: 33412144 PMCID: PMC7920929 DOI: 10.1016/j.cca.2020.12.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/07/2020] [Accepted: 12/18/2020] [Indexed: 11/18/2022]
Abstract
Parathyroid hormone (PTH) determination is of greatest importance for patients suffering from parathyroid gland disorders and for the follow-up of bone turnover in patients suffering from chronic kidney disease (CKD). Two generations of PTH assays are simultaneously present on the market for PTH quantification. As these assays are not yet standardized, this results in a significant level of confusion in the care of CKD patients. One key objective of the IFCC Committee for Bone Metabolism is to improve this situation. In this position paper, we will highlight the current state of PTH testing and propose a pathway to ultimately overcome issues resulting from PTH assay variability.
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Affiliation(s)
- Etienne Cavalier
- Department of Clinical Chemistry, University of Liège, CHU de Liège, Domaine du Sart-Tilman, B-4000 Liège, Belgium.
| | - Samuel Vasikaran
- PathWest Laboratory Medicine, Fiona Stanley Hospital, Murdoch, WA, Australia
| | - Harjit P Bhattoa
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen Hungary
| | - Annemieke C Heijboer
- Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam Gastroenterology & Metabolism, Vrije Universiteit Amsterdam and University of Amsterdam, Amsterdam UMC, Amsterdam, Netherlands
| | - Konstantinos Makris
- Clinical Biochemistry Department, KAT General Hospital, 14561 Athens, Greece; Laboratory for Research of the Musculoskeletal System "Th. Garofalidis", Medical School, University of Athens, Athens, Greece
| | - Candice Z Ulmer
- Clinical Chemistry Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Buford, Atlanta, GA, USA
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Bielach-Bazyluk A, Zbroch E, Czajkowska K, Koc-Zorawska E, Kakareko K, Rydzewska-Rosolowska A, Hryszko T. Serum sirtuin 1 is independently associated with intact PTH among patients with chronic kidney disease. Clin Interv Aging 2021; 16:525-536. [PMID: 33790547 PMCID: PMC8007476 DOI: 10.2147/cia.s293665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/26/2021] [Indexed: 11/23/2022] Open
Abstract
Background Sirtuin 1 is involved in the pathogenesis of age-related diseases. Purpose The aim of the study was to assess the clinical and diagnostic value of serum sirtuin 1 concentration in patients with CKD. Patients and Methods The serum sirtuin 1 level was evaluated using ELISA kit in 100 CKD patients stratified for five stages and in a control group of 24 healthy volunteers. Results Serum sirtuin 1 concentration was higher in the CKD group compared with the control group (p<0.05). Sirtuin 1 correlated with conventional CKD biomarkers and eGFR equations, intact parathyroid hormone (iPTH) and age (all p<0.05). Statins, AT1 receptor antagonists and β-blockers use were associated with decreased sirtuin concentration (p<0.05). Sirtuin 1 was able to distinguish CKD from control group with high sensitivity and specificity (93% and 87%, respectively; AUC=0.954). Surprisingly, after adjustment only iPTH concentration was an independent predictor of sirtuin 1 level. Conclusion The association between sirtuin 1, eGFR equations and iPTH indicates its possible usefulness as a kidney function marker. In terms of iPTH being the only independent predictor of circulating sirtuin 1 it can be considered as an indirect cardiovascular risk biomarker regardless of renal function and provide additional information for patient management. Alternatively, sirtuin 1 is recognized as protective against vascular disease, and we demonstrated a positive correlation with iPTH, which may be related to accumulation of (7-84)-PTH having opposite biological effects to full-length PTH. Further studies are needed to explore the interplay between sirtuin 1, PTH and CKD-related vascular calcification as well as to assess its prognostic value in observational studies.
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Affiliation(s)
- Angelika Bielach-Bazyluk
- 2nd Department of Nephrology and Hypertension with Dialysis Centre, Medical University, Bialystok, Poland
| | - Edyta Zbroch
- Department of Internal Medicine and Hypertension, Medical University, Bialystok, Poland
| | - Katarzyna Czajkowska
- 2nd Department of Nephrology and Hypertension with Dialysis Centre, Medical University, Bialystok, Poland
| | - Ewa Koc-Zorawska
- 2nd Department of Nephrology and Hypertension with Dialysis Centre, Medical University, Bialystok, Poland
| | - Katarzyna Kakareko
- 2nd Department of Nephrology and Hypertension with Dialysis Centre, Medical University, Bialystok, Poland
| | | | - Tomasz Hryszko
- 2nd Department of Nephrology and Hypertension with Dialysis Centre, Medical University, Bialystok, Poland
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Cormier C, Koumakis E. Bones and Primary Hyperparathyroidism. Joint Bone Spine 2021; 89:105129. [PMID: 33484857 DOI: 10.1016/j.jbspin.2021.105129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2020] [Indexed: 10/22/2022]
Abstract
Primary hyperparathyroidism (PHPT) is a disease caused by excessive and inappropriate secretion of parathyroid hormone resulting in hypercalcemia. It is usually diagnosed incidentally in the face of hypercalcemia, a complication such as osteoporosis or, more rarely, a renal complication with lithiasis. The clinical presentation reflects hypercalcemia and involves several organs, mainly the cardiovascular system, bones, and kidneys. However, most patients with PHPT are asymptomatic. The diagnosis is made based on laboratory tests. It is easy when serum calcium and parathyroid hormone levels are high, but difficult when one of these two values is normal. Normocalcemic PHPT can be diagnosed only after ruling out all causes of secondary hyperparathyroidism. Parathyroid imaging cannot diagnose it but guides the surgeon and rules out an associated thyroid abnormality. The reference treatment is surgery. The surgical indication is based on the presence or risk of complications, and it is the only treatment that prevents fractures. Pharmaceutical treatments have only limited effects on complications and are reserved for cases where surgery is contraindicated. After parathyroid surgery, the use of bisphosphonates must be avoided as they seem to interfere with the parathyroidectomy's fracture-preventing effects. If surgery is not indicated, a plan for monitoring laboratory values, bone density, and renal function will be established.
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Affiliation(s)
- Catherine Cormier
- Service de Rhumatologie Hôpital Cochin, APHP, Université Paris Descartes Centre de Référence des Maladies du Métabolisme du Calcium et du Phosphate 27 Rue du Faubourg St Jacques, 75679 PARIS Cedex 14, France.
| | - Eugénie Koumakis
- Service de Rhumatologie Hôpital Cochin, APHP, Université Paris Descartes Centre de Référence des Maladies du Métabolisme du Calcium et du Phosphate 27 Rue du Faubourg St Jacques, 75679 PARIS Cedex 14, France
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17
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Malla P, Chen GC, Liao HP, Liu CH, Wu WC. Label-free parathyroid hormone immunosensor using nanocomposite modified carbon electrode. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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Chen GC, Liu CH, Wu WC. Electrochemical immunosensor for serum parathyroid hormone using voltammetric techniques and a portable simulator. Anal Chim Acta 2021; 1143:84-92. [DOI: 10.1016/j.aca.2020.11.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/25/2020] [Accepted: 11/27/2020] [Indexed: 01/10/2023]
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Minisola S, Colangelo L, Pepe J, Occhiuto M, Piazzolla V, Renella M, Biamonte F, Sonato C, Cilli M, Cipriani C. Vitamin D screening. J Endocrinol Invest 2020; 43:1047-1051. [PMID: 32189163 DOI: 10.1007/s40618-020-01220-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 03/09/2020] [Indexed: 02/07/2023]
Abstract
At present, there is no need and no sufficient evidence to support universal screening for vitamin D status. There are four categories of subjects in whom there is no requirement for screening, since a number of studies indicate beneficial effects of vitamin D supplementation; these are represented by children and adolescents, pregnant women, patients taking bone active drugs and subjects with documented hypovitaminosis D. In the remaining subjects, the utilization of adequate questionnaires will target with sufficient sensitivity and specificity those with hypovitaminosis D. These must be first supplemented and, at a later time, serum 25(OH)D assay should be requested to confirm attainment of sufficiency, independently of the threshold chosen. This strategy will cut costs deriving from both widespread use of vitamin D assays and vitamin D supplementation.
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Affiliation(s)
- S Minisola
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy.
| | - L Colangelo
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - J Pepe
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - M Occhiuto
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - V Piazzolla
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - M Renella
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - F Biamonte
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - C Sonato
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - M Cilli
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
| | - C Cipriani
- Department of Clinical, Internal, Anaesthesiologic and Cardiovascular Sciences, "Sapienza", Rome University, Viale del Policlinico 155, 00161, Rome, Italy
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Groenendijk I, Chan R, Woo J, Ong S, Parikh P, Bragt MCE, de Groot LCPGM. A Combined Nutrition and Exercise Intervention Influences Serum Vitamin B-12 and 25-Hydroxyvitamin D and Bone Turnover of Healthy Chinese Middle-Aged and Older Adults. J Nutr 2020; 150:2112-2119. [PMID: 32588047 PMCID: PMC7398768 DOI: 10.1093/jn/nxaa149] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/09/2020] [Accepted: 05/04/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Hong Kong faces several public health problems including malnutrition and osteoporosis. Considering the typical Chinese diet and overall low physical activity levels of Chinese adults, timely interventions to improve nutritional status and bone health are needed. OBJECTIVES We examined the effects of a nutrition plus exercise intervention on serum vitamin B-12 and 25-hydroxyvitamin D [25(OH)D], bone turnover markers, and parathyroid hormone (PTH) concentrations in apparently healthy Chinese middle-aged and older adults. METHODS In this 24-wk randomized controlled trial, 180 Chinese adults (85 women, mean ± SD age: 61 ± 6 y) were randomly assigned to receive a fortified milk supplement (2 × 30 g/d) and an exercise program (2 × 1 h/wk including resistance, balance, and aerobic training) or no intervention. The primary outcome was physical performance. In this article we analyzed the secondary outcomes serum vitamin B-12 and 25(OH)D concentrations, assessed at baseline, 12 wk, and 24 wk. Also, bone turnover markers and PTH concentrations were studied. Linear mixed models evaluated group differences over time. RESULTS A significant time × group interaction (P < 0.001) was found for serum vitamin B-12 and 25(OH)D concentrations and the bone turnover markers, but not for serum PTH concentrations (P = 0.09). The intervention increased mean ± SD vitamin B-12 concentrations from baseline (345 ± 119 pmol/L) to 24 wk (484 ± 136 pmol/L), whereas concentrations remained stable within the control. For 25(OH)D concentrations, the intervention group had a greater increase from baseline (54.7 ± 14.2 nmol/L) to 24 wk (80.1 ± 19.2 nmol/L) than the control (60.6 ± 15.2 compared with 65.6 ± 14.6 nmol/L). The ratio of the net effect of bone formation and resorption was greater in the intervention group, suggesting less bone remodeling, irrespective of sex. CONCLUSIONS A fortified milk supplement and exercise intervention successfully improved vitamin B-12 and 25(OH)D concentrations as well as the balance of bone turnover markers of Chinese middle-aged and older adults.This trial was registered at trialregister.nl as NTR6214.
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Affiliation(s)
| | - Ruth Chan
- Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jean Woo
- Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | | | | | | | - Lisette C P G M de Groot
- Division of Human Nutrition and Health, Wageningen University & Research, Wageningen, Netherlands
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Bottani M, Banfi G, Guerra E, Locatelli M, Aarsand AK, Coşkun A, Díaz-Garzón J, Fernandez-Calle P, Sandberg S, Ceriotti F, González-Lao E, Simon M, Carobene A. European Biological Variation Study (EuBIVAS): within- and between-subject biological variation estimates for serum biointact parathyroid hormone based on weekly samplings from 91 healthy participants. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:855. [PMID: 32793699 DOI: 10.21037/atm-19-4498] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background The European Biological Variation Study (EuBIVAS) was created by the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) Working Group on Biological Variation to establish high-quality biological variation (BV) estimates for clinically important measurands. In this study, the aim was to deliver reliable BV estimates for the biointact parathyroid hormone (PTH 1-84). Methods Serum samples were obtained from a population of 91 healthy individuals (38 men, 43 pre-menopausal women, and 10 post-menopausal women; 21-69 years) from 5 European countries, with all samples stored at -80 °C prior to analysis. PTH 1-84 analysis was performed at the San Raffaele Hospital (Milan, Italy) on the Roche Cobas e801. All samples from each individual were analysed in duplicate within a single run. CV-ANOVA was applied, after analysis of variance homogeneity and outliers, to obtain BV estimates for PTH 1-84 with 95% CIs. Results The within-subject BV [CVI (95% CI)] estimates were significantly different between men and women [13.0% (12.1-14.2%) and 15.2% (14.3-16.3%), respectively], while the between-subject estimates [CVG (95% CI)] were similar (men: 26.8% (21.4-35.1%), pre-menopausal women: 27.8% (22.7-36.1%)], allowing for delivery of updated analytical performance specifications and reference change values. Conclusions Updated BV estimates for serum PTH 1-84 based on the large-scale EuBIVAS may be beneficial for the diagnosis and management of parathyroid glands and bone turnover pathologies.
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Affiliation(s)
- Michela Bottani
- IRCCS Istituto Ortopedico Galeazzi, Laboratory of Experimental Biochemistry and Molecular Biology, Milan, Italy
| | - Giuseppe Banfi
- IRCCS Istituto Ortopedico Galeazzi, Laboratory of Experimental Biochemistry and Molecular Biology, Milan, Italy.,Vita-Salute San Raffaele University, Milan, Italy
| | - Elena Guerra
- Laboratory Medicine, Ospedale San Raffaele, Milan, Italy
| | | | - Aasne K Aarsand
- Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway.,Norwegian Organization for Quality Improvement of Laboratory Examinations (Noklus), Haraldsplass Deaconess Hospital, Bergen, Norway
| | - Abdurrahman Coşkun
- Acibadem Mehmet Ali Aydınlar University, School of Medicine, Atasehir, Istanbul, Turkey
| | - Jorge Díaz-Garzón
- Hospital Universitario La Paz, Madrid, Spain, and Quality Analytical Commission of Spanish Society of Clinical Chemistry (SEQC), Barcelona, Spain
| | - Pilar Fernandez-Calle
- Hospital Universitario La Paz, Madrid, Spain, and Quality Analytical Commission of Spanish Society of Clinical Chemistry (SEQC), Barcelona, Spain
| | - Sverre Sandberg
- Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway.,Norwegian Organization for Quality Improvement of Laboratory Examinations (Noklus), Haraldsplass Deaconess Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Ferruccio Ceriotti
- Central Laboratory, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | | | - Margarita Simon
- Intercomarcal Laboratory Consortiums of Alt Penedès, Anoia and Garraf, Barcelona, Spain
| | - Anna Carobene
- Laboratory Medicine, Ospedale San Raffaele, Milan, Italy
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Biochemical Alterations in Patients with Oxalocalcic Lithiasis, the Influence of Sex, Age, and Body Mass Index. Nephrourol Mon 2020. [DOI: 10.5812/numonthly.103639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Urolithiasis is a disorder that has a high prevalence in the population. Also, lithiasic patients have biochemical alterations that predispose them to the formation of stones. The knowledge of these alterations may be useful for future preventive interventions. Objectives: The objectives were to describe the metabolic characteristics of patients with oxalocalcic lithiasis, identifying the most frequent biochemical alterations, and their variation with different demographic variables. In this way, we can prevent the formation of the lithiasis before it appears, instead of treating it once established. Methods: A descriptive cross-sectional study of serum and 24 hour-urine parameters in patients with oxalocalcic lithiasis was performed. The most frequent biochemical alterations were described, and their association with age, sex, and body mass index (BMI) were assessed. Results: In this study, 100% of the 151 patients had biochemical alterations, the most frequent being hypocitraturia (84.7%), hypercalciuria (51.7%), and urinary pH decrease (44.4%). There were differences according to sex, age, and BMI with regard to the biochemical alterations. Hypouricemia, hypouricosuria, hypophosphaturia and hypomagnesuria were more frequent in women. Men had a higher percentage of hyperzinquemia, hyperphosphaturia, and excess of urinary urea. Urine density in men was slightly higher than in women. A higher percentage of hyperphosphaturia, excess urinary urea, and excess of serum urea was found in overweight patients. Patients not overweight showed a higher percentage of hypouricemia and hypomagnesuria. Urinary density was slightly higher in overweight patients. Urinary volume was higher in middle-aged subjects. Conclusions: Patients with oxalocalcic lithiasis have biochemical alterations that may predispose to stone formation. These alterations vary with sex, age, and BMI.
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Delgado JA, Bauça JM, Pastor MI, Barceló A. Use of data mining in the establishment of age-adjusted reference intervals for parathyroid hormone. Clin Chim Acta 2020; 508:217-220. [PMID: 32417213 DOI: 10.1016/j.cca.2020.05.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/23/2020] [Accepted: 05/13/2020] [Indexed: 01/25/2023]
Abstract
BACKGROUND-AIM Appropriately defined reference values are of vital importance for the correct interpretation of laboratory results. However, the implementation of in-house reference intervals by traditional methods is rare due to difficulties in the selection of reference individuals, so indirect methods are often alternatively used. Parathyroid hormone (PTH) is a crucial hormone for the metabolism of calcium and phosphorus whose result can lead to erroneous diagnoses and medical actions if adequate reference intervals are not readily available. Our goal was to obtain reference values for adult population for PTH by using data mining. Based on possible new reference intervals, we also aimed to perform a retrospective evaluation of the individuals mistakenly classified. METHODS Retrospective observational study between 2014 and 2019. All requests from individuals aged ≥ 18 years were considered if PTH was requested together with serum creatinine, 25-hydroxyvitamin D, calcium, albumin and phosphate (within their respective reference intervals). PTH was measured on the Cobas e411 platform (Roche). Requests were grouped by age and sex. Differences among partitions were assessed by the Harris-Boyd's test and reference intervals were determined by the non-parametrical calculation of percentiles 2.5 and 97.5. RESULTS A total of 2279 laboratory requests were included. Reference intervals for PTH were seen to be sex-independent, but age-dependent reference intervals were needed: 18-39, 40-59 and >60 years. Based on the reference intervals obtained, up to 20.1% of individuals were misclassified. CONCLUSIONS Appropriateness of PTH reference intervals would lead to a reduction in the number of additional tests and avoid wrong medical actions, thus improving not only patient safety, but also the healthcare system as a whole.
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Affiliation(s)
- Jose Antonio Delgado
- Department of Laboratory Medicine, Hospital Universitari Son Espases, Palma, Spain.
| | - Josep Miquel Bauça
- Department of Laboratory Medicine, Hospital Universitari Son Espases, Palma, Spain; Institut d'Investigació Sanitària de les Illes Balears (IdISBa), Spain
| | - María I Pastor
- Department of Laboratory Medicine, Hospital Universitari Son Espases, Palma, Spain
| | - Antònia Barceló
- Department of Laboratory Medicine, Hospital Universitari Son Espases, Palma, Spain; Institut d'Investigació Sanitària de les Illes Balears (IdISBa), Spain
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24
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Marx SJ, Sinaii N. Neonatal Severe Hyperparathyroidism: Novel Insights From Calcium, PTH, and the CASR Gene. J Clin Endocrinol Metab 2020; 105:5645387. [PMID: 31778168 PMCID: PMC7111126 DOI: 10.1210/clinem/dgz233] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/26/2019] [Indexed: 12/24/2022]
Abstract
CONTEXT Neonatal severe hyperparathyroidism (NSHPT) is rare and potentially lethal. It is usually from homozygous or heterozygous germline-inactivating CASR variant(s). NSHPT shows a puzzling range of serum calcium and parathyroid hormone (PTH) levels. Optimal therapy is unclear. EVIDENCE ACQUISITION We categorized genotype/phenotype pairings related to CASRs. For the 2 pairings in NSHPT, each of 57 cases of neonatal severe hyperparathyroidism required calcium, PTH, upper normal PTH, and dosage of a germline pathogenic CASR variant. EVIDENCE SYNTHESIS Homozygous and heterozygous NSHPT are 2 among a spectrum of 9 genotype/phenotype pairings relating to CASRs and NSHPT. For the 2 NSHPT pairings, expressions differ in CASR allelic dosage, CASR variant severity, and sufficiency of maternofetal calcium fluxes. Homozygous dosage of CASR variants was generally more aggressive than heterozygous. Among heterozygotes, high-grade CASR variants in vitro were more pathogenic in vivo than low-grade variants. Fetal calcium insufficiency as from maternal hypoparathyroidism caused fetal secondary hyperparathyroidism, which persisted and was reversible in neonates. Among NSHPT pairings, calcium and PTH were higher in CASR homozygotes than in heterozygotes. Extreme hypercalcemia (above 4.5 mM; normal 2.2-2.6 mM) is a robust biomarker, occurring only in homozygotes (83% of that pairing). It could occur during the first week. CONCLUSIONS In NSHPT pairings, the homozygotes for pathogenic CASR variants show higher calcium and PTH levels than heterozygotes. Calcium levels above 4.5 mM among NSHPT are frequent and unique only to most homozygotes. This cutoff supports early and robust diagnosis of CASR dosage. Thereby, it promotes definitive total parathyroidectomy in most homozygotes.
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MESH Headings
- Biomarkers/analysis
- Calcium/blood
- Female
- Genotype
- Heterozygote
- Homozygote
- Humans
- Hyperparathyroidism, Primary/blood
- Hyperparathyroidism, Primary/diagnosis
- Hyperparathyroidism, Primary/genetics
- Infant, Newborn
- Infant, Newborn, Diseases/blood
- Infant, Newborn, Diseases/diagnosis
- Infant, Newborn, Diseases/genetics
- Male
- Mutation
- Parathyroid Hormone/blood
- Prognosis
- Receptors, Calcium-Sensing/genetics
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Affiliation(s)
- Stephen J Marx
- Office of the Scientific Director, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), Bethesda, MD
- Correspondence: Stephen Marx MD, N.I.H., Bld 6A, Room 2A-04A, MSC 0614, 6 Center Drive, Bethesda, MD 20892, USA. E-mail:
| | - Ninet Sinaii
- Biostatistics and Clinical Epidemiology Service, National Institutes of Health Clinical Center, Bethesda, MD
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25
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Geserick M, Vogel M, Eckelt F, Schlingmann M, Hiemisch A, Baber R, Thiery J, Körner A, Kiess W, Kratzsch J. Children and adolescents with obesity have reduced serum bone turnover markers and 25-hydroxyvitamin D but increased parathyroid hormone concentrations - Results derived from new pediatric reference ranges. Bone 2020; 132:115124. [PMID: 31830529 DOI: 10.1016/j.bone.2019.115124] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/22/2019] [Accepted: 10/26/2019] [Indexed: 01/28/2023]
Abstract
BACKGROUND We aimed to establish age- and gender-specific reference ranges for concentrations of the bone markers osteocalcin (OC), procollagen type 1 N-propeptides (PINP) and carboxy-terminal cross-linking telopeptide of type 1 collagen (CTX-I) as well as for the calciotropic hormones 25-hydroxyvitamin D [25(OH)D] and parathyroid hormone (PTH) in healthy infants, children and adolescents. In addition, the effect of age, gender, puberty and body mass index (BMI) on bone markers was investigated. METHODS 2416 healthy subjects (5714 blood withdrawals), aged 3 months to 17 years, were included to estimate the age- and gender-dependence of reference ranges. Subsequently, measured values of the biomarkers were transformed to standard deviation scores (SDS) and their associations with age, gender and puberty were analyzed. Bone marker-SDS values of the reference cohort were compared with an obese cohort (n = 317 and 489 blood withdrawals) to analyze the effect of BMI. RESULTS OC, PINP and CTX-I showed a distinct age- and gender-dependence with peak levels at 10 to 11 years (girls, Tanner 3) and 13 years (boys, Tanner 3-4). Children with obesity had significantly lower SDS levels for OC (-0.44), PINP (-0.27), CTX-I (-0.33), 25(OH)D (-0.43) and higher SDS levels for PTH (+0.44) than the reference cohort. CONCLUSIONS OC, PINP and CTX-I vary with age, gender and pubertal stage. The body weight status has to be considered in the interpretation of pediatric OC, PINP, CTX-I, 25(OH)D and PTH levels. Consequences of childhood obesity on bone health should be carefully investigated in long-term studies.
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Affiliation(s)
- M Geserick
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany
| | - M Vogel
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany
| | - F Eckelt
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Paul-List-Strasse 13-15, 04103 Leipzig, Germany
| | - M Schlingmann
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany; Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Liebigstrasse 20a, 04103 Leipzig, Germany
| | - A Hiemisch
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany; Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Liebigstrasse 20a, 04103 Leipzig, Germany
| | - R Baber
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany; Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Paul-List-Strasse 13-15, 04103 Leipzig, Germany
| | - J Thiery
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany; Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Paul-List-Strasse 13-15, 04103 Leipzig, Germany
| | - A Körner
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany; Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Liebigstrasse 20a, 04103 Leipzig, Germany; Integrated Research and Treatment Center (IFB) AdiposityDiseases, University of Leipzig, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany
| | - W Kiess
- LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Strasse 27, 04103 Leipzig, Germany; Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Liebigstrasse 20a, 04103 Leipzig, Germany
| | - J Kratzsch
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Paul-List-Strasse 13-15, 04103 Leipzig, Germany.
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26
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Gannagé-Yared MH, Kallas-Chémaly MN, Sleilaty G. Parathormone Levels in a Middle-Eastern Healthy Population Using 2 nd and 3 rd Generation PTH Assays. Int J Endocrinol 2020; 2020:6302861. [PMID: 32148490 PMCID: PMC7054794 DOI: 10.1155/2020/6302861] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/15/2019] [Accepted: 01/23/2020] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND The purpose of the current study is to determine PTH reference values in vitamin-D-replete Lebanese adults using 2nd and 3rd generation PTH assays and to look at the factors that affect PTH variations. METHODS Fasting PTH was measured using 2nd and 3rd generation Diasorin PTH assays in 339 vitamin-D-replete healthy subjects aged 18 to 63 years (230 men and 109 women) who have normal calcium levels and an eGFR ≥60 ml/mn. 25-OH vitamin D (25(OH)D) was measured using the Diasorin assay. RESULTS For the 2nd PTH generation, median (IQR) levels were 48.9 (34.9-66.0) pg/ml, and its 2.5th-97.5th percentile values were 19.7-110.5 pg/ml for 25(OH)D values between 20 and 30 ng/ml, and 19.7-110.7 pg/ml for 25(OH)D values ≥30 ng/ml. For the 3rd PTH generation, the median (IQR) values were 23.9 (17.7-30.5) pg/ml, and its 2.5th-97.5th percentile values were, respectively, 9.2 and 50.2 pg/ml for 25(OH)D values between 20 and 30 ng/ml, and 8.4 and 45.4 pg/ml for 25(OH)D values ≥30 ng/ml. The median (IQR) serum 25(OH)D levels were 27.5 (23.8-32.7) ng/ml. 2nd and 3rd generation PTH values are strongly correlated (r = 0.96, p < 0.0001), but poorly concordant (Lin's concordance coefficient 0.365, 95% CI: 0.328-0.401) with observations beyond the 95% Bland-Altman limits of agreement. 2nd and 3rd generation PTH levels did not differ according to gender and were significantly correlated with age but not with 25(OH)D and serum calcium levels. CONCLUSION Lebanese adult healthy subjects have higher 2nd and 3rd generation PTH levels compared with the reference range provided by the manufacturer. The reference range was not influenced by changing the 25(OH)D cutoff. The clinical significance of the higher PTH levels in our population should be investigated.
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Affiliation(s)
| | | | - Ghassan Sleilaty
- Department of Biostatistics, Faculty of Medicine, Saint-Joseph University, Beirut, Lebanon
- Clinical Research Center, Faculty of Medicine, Saint-Joseph University, Beirut, Lebanon
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27
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Smit MA, van Kinschot CMJ, van der Linden J, van Noord C, Kos S. Clinical Guidelines and PTH Measurement: Does Assay Generation Matter? Endocr Rev 2019; 40:1468-1480. [PMID: 31081903 DOI: 10.1210/er.2018-00220] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 03/08/2019] [Indexed: 11/19/2022]
Abstract
PTH is an important regulator of calcium and phosphate homeostasis and bone remodeling. It is metabolized into PTH fragments, which are measured to a different extent by PTH assays of different generations because of differences in fragments recognized and lack of assay standardization. PTH is measured in the workup of several conditions, and clinical guidelines provide recommendations concerning these measurements. This review provides an overview of the impact of differences between PTH assays, applying distinct clinical guidelines for primary and secondary hyperparathyroidism and perioperative use of PTH measurements. Guidelines deal with PTH measurement in different ways, recommending either trend monitoring, the use of a fold increase of the upper reference limit, or an absolute PTH cutoff value. For classic primary hyperparathyroidism (PHPT), the type of PTH assay used will not affect diagnosis or management because the precise concentration of PTH is less relevant. In chronic kidney disease, the guideline recommends treating secondary hyperparathyroidism above a twofold to ninefold PTH increase, which will result in different clinical decisions depending on the assay used. For patients after bariatric surgery, guidelines state absolute cutoff values for PTH, but the impact of different generation assays is unknown because direct comparison of PTH assays has never been performed. During parathyroid surgery, PTH measurements with a third-generation assay reflect treatment success more rapidly than second-generation assays. Increased awareness among clinicians regarding the complexity of PTH measurements is warranted because it can affect clinical decisions.
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Affiliation(s)
- Marjon A Smit
- Department of Clinical Chemistry, Maasstad Hospital, Rotterdam, Netherlands
| | | | | | | | - Snježana Kos
- Department of Clinical Chemistry, Maasstad Hospital, Rotterdam, Netherlands
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28
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Capelli I, Cianciolo G, Gasperoni L, Galassi A, Ciceri P, Cozzolino M. Nutritional vitamin D in CKD: Should we measure? Should we treat? Clin Chim Acta 2019; 501:186-197. [PMID: 31770508 DOI: 10.1016/j.cca.2019.11.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 11/04/2019] [Accepted: 11/06/2019] [Indexed: 02/08/2023]
Abstract
Vitamin Ddeficiency is frequently present in patients affected by chronic kidney disease (CKD). Experimental studies demonstrated that Vitamin D may play a role in the pathophysiology of diseases beyond mineral bone disorders in CKD (CKD-MBD). Unfortunately, the lack of large and interventional studies focused on the so called "non-classic" effects of 25(OH) Vitamin D supplementation in CKD patients, doesn't permit to conclude definitely about the beneficial effects of this supplementation in clinical practice. In conclusion, treatment of nutritional vitamin D deficiency in CKD may play a central role in both bone homeostasis and cardiovascular outcomes, but there is not clear evidence to support one formulation of nutritional vitamin D over another in CKD.
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Affiliation(s)
- Irene Capelli
- Department of Experimental Diagnostic and Specialty Medicine (DIMES), Nephrology, Dialysis and Renal Transplant Unit, S. Orsola Hospital, University of Bologna, Bologna, Italy
| | - Giuseppe Cianciolo
- Department of Experimental Diagnostic and Specialty Medicine (DIMES), Nephrology, Dialysis and Renal Transplant Unit, S. Orsola Hospital, University of Bologna, Bologna, Italy
| | - Lorenzo Gasperoni
- Department of Experimental Diagnostic and Specialty Medicine (DIMES), Nephrology, Dialysis and Renal Transplant Unit, S. Orsola Hospital, University of Bologna, Bologna, Italy
| | - Andrea Galassi
- Renal Division, ASST Santi Paolo e Carlo, Department of Health Sciences, University of Milan, Italy
| | - Paola Ciceri
- Renal Research Laboratory, Department of Nephrology, Dialysis and Renal Transplant, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Mario Cozzolino
- Renal Division, ASST Santi Paolo e Carlo, Department of Health Sciences, University of Milan, Italy.
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29
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Yalla N, Bobba G, Guo G, Stankiewicz A, Ostlund R. Parathyroid hormone reference ranges in healthy individuals classified by vitamin D status. J Endocrinol Invest 2019; 42:1353-1360. [PMID: 31273631 PMCID: PMC6790182 DOI: 10.1007/s40618-019-01075-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/11/2019] [Indexed: 12/19/2022]
Abstract
PURPOSE Parathyroid hormone (PTH) concentrations are routinely measured in the diagnosis and management of bone and kidney diseases, but reference ranges can be overestimated if determined in otherwise healthy individuals for whom vitamin D deficiency was not evaluated. We establish PTH reference ranges in apparently healthy, normocalcemic, normophosphatemic individuals categorized by 25-hydroxyvitamin D (25(OH)D) status using the Elecsys® PTH (cobas e 601) and Elecsys® Vitamin D total II electrochemiluminescence immunoassays (cobas e 411). METHODS This prospective, non-interventional study measured PTH in serum from 653 apparently healthy adults [56.7% female; 68.2% white/Caucasian; 28.6% African American; median age 44 years (range 21-83)] from three diverse geographic sites across the USA during summer and winter months. Subjects were classified by concomitant vitamin D sufficiency (≥ 30 ng/mL), insufficiency (> 20 to < 30 ng/mL) or deficiency (≤ 20 ng/mL). RESULTS In vitamin D sufficiency, median PTH was 31.9 pg/mL [range (2.5th-97.5th percentile) 17.9-58.6] compared with 35.5 pg/mL (17.0-60.4) for insufficiency, and 39.8 pg/mL (19.5-86.4) for deficiency. A significant inverse relationship was found between PTH and 25(OH)D (P < 0.001). After accounting for vitamin D, potential effects of race or season as covariates were relatively small or absent. CONCLUSIONS Upper reference limits (URL) for PTH in vitamin D sufficiency/insufficiency were similar and lower than current values. Clinically important PTH elevations were observed in vitamin D deficiency, where revised reference ranges with a higher URL may be appropriate. These data may help to distinguish vitamin D-related PTH elevations from other causes [e.g., primary (normocalcemic) or secondary hyperparathyroidism].
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Affiliation(s)
- N Yalla
- Washington University, St. Louis, MO, USA
| | - G Bobba
- Roche Diagnostics International Ltd, Rotkreuz, Switzerland
| | - G Guo
- Roche Diagnostics Inc., Indianapolis, IN, USA
| | | | - R Ostlund
- Washington University, St. Louis, MO, USA.
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30
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Ferrone F, Pepe J, Danese VC, Fassino V, Cecchetti V, De Lucia F, Biamonte F, Colangelo L, Ferrazza G, Panzini E, Scillitani A, Nieddu L, Blocki F, Rao SD, Minisola S, Cipriani C. The relative influence of serum ionized calcium and 25-hydroxyvitamin D in regulating PTH secretion in healthy subjects. Bone 2019; 125:200-206. [PMID: 31129357 DOI: 10.1016/j.bone.2019.05.029] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 05/22/2019] [Accepted: 05/22/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND While the inverse relationship between serum ionized calcium (Ca2+) and PTH is well-established, the relationship between 25(OH)D and PTH showed conflicting results. The study aimed to evaluate the relative contributions of age, sex, serum Ca2+, ionized magnesium (Mg2+), 25(OH)D and 1,25(OH)2D in regulating PTH secretion in healthy subjects. METHODS This is a secondary analysis of an observational study performed from March 2014 to July 2015 carried out in 2259 blood donors (1652 men and 607 women, age range 18-68 years). Subjects with parathyroid disorders and taking drugs that affect mineral metabolism were excluded. RESULTS Significant correlations [between Ca2+ and PTH (r = -0.223, p < 0.001), 25(OH)D and PTH (r = -0.178, p < 0.001) and between PTH and age (r = 0.322, p < 0.001)] were found. As a preliminary step to multivariate analysis, a regression tree analysis was performed using PTH as response variable and age, Ca2+, Mg2+, 25(OH)D, 1,25(OH)2D and sex as explanatory variables to determine the effect of each covariate on the response variable. For subjects <38 years, 25(OH)D was the most important parameter in regulating PTH. For subjects ≥38 both 25(OH)D and Ca2+ levels regulated PTH secretion. Subjects with 25(OH)D < 13 ng/mL had average higher PTH; in this group only, subjects with Ca2+ ≥ 1.30 mmol/L had average lower PTH compared to subjects with Ca2+ < 1.30. The multivariate analysis showed that all variables had a significant effect (p < 0.001) on PTH. Anova Type III errors c indicated that 25(OH)D accounted for 32.1% of the total variance in PTH, Ca2+ accounted for 18% of the total variance, BMI for 14.3%, and 1,25(OH)2D for 11.1%. The remaining percentage was attributable to age and sex. This was confirmed by the regression tree approach, where 25(OH)D and Ca2+ accounted for the largest variation in the average levels of PTH. DISCUSSION Under stable conditions 25(OH)D plays a significant role in regulating PTH secretion. Under conditions of relative vitamin D sufficiency, Ca2+ also plays an important role.
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Affiliation(s)
- Federica Ferrone
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Jessica Pepe
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Vittoria Carmela Danese
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Valeria Fassino
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Veronica Cecchetti
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Federica De Lucia
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Federica Biamonte
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Luciano Colangelo
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Giancarlo Ferrazza
- Department of Immunohematology and Transfusion Medicine, "Sapienza" Rome University, Rome, Italy
| | - Enrico Panzini
- Department of Immunohematology and Transfusion Medicine, "Sapienza" Rome University, Rome, Italy
| | - Alfredo Scillitani
- Unit of Endocrinology "Casa Sollievo della Sofferenza" Hospital, San Giovanni Rotondo, Foggia, Italy
| | | | - Frank Blocki
- DiaSorin Inc., 1951 Northwestern Avenue, Stillwater, MN, USA
| | - Sudhaker D Rao
- Bone and Mineral Research Laboratory, Division of Endocrinology, Diabetes, and Bone & Mineral Disorders, Henry Ford Hospital, Detroit, MI, USA
| | - Salvatore Minisola
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy.
| | - Cristiana Cipriani
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
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31
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Cavalier E, Sagou Yayo E, Attoungbre-Hauhouot ML, Konan JL, Yao-Yapo C, Monnet D, Gnionsahé A, Souberbielle JC, Delanaye P. Vitamin D, bone alkaline phosphatase and parathyroid hormone in healthy subjects and haemodialysed patients from West Africa: impact of reference ranges and parathyroid hormone generation assays on the KDIGO guidelines. Clin Kidney J 2019; 12:288-293. [PMID: 30976410 PMCID: PMC6452202 DOI: 10.1093/ckj/sfy074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The Kidney Disease: Improving Global Outcomes (KDIGO) guidelines recommend targets based on multiples of the upper limit of normal (ULN) of parathyroid hormone (PTH) concentration. However, the ULN has not always been correctly established by manufacturers. While it is known that the ULN is supposed to be higher in African Americans than in Caucasians, it is largely unknown in Africans. METHODS We established the ULN of PTH concentration in a population of 240 healthy Ivorians using second- and third-generation PTH assays before and after supplementation with 100 000 IU of cholecalferol. We measured the levels of PTH, bone alkaline phosphatase, 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D in 100 haemodialysed Ivorian patients. RESULTS The prevalence of vitamin D deficiency in Ivory Coast is low. The ULN obtained using the third-generation PTH assay was similar to that obtained in Caucasians but was higher when PTH was measured using the second-generation PTH assay. According to the KDIGO guidelines, ∼20% of the haemodialysed patients were below twice the ULN and 30% were above nine times the ULN. Approximately 25% of the patients were even >12 times the ULN. We observed a discrepancy in the results between the two PTH assays (14%) that was relatively more important than what we observed from previous studies in Caucasians using the same strategy. CONCLUSIONS We found a low prevalence of vitamin D deficiency in a tropical country like Ivory Coast. We also established the PTH reference range, which could prove useful for the follow-up of haemodialysed patients, particularly for the large number of patients suffering from secondary hyperparathyroidism who are at high risk of adverse bone events.
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Affiliation(s)
- Etienne Cavalier
- Department of Clinical Chemistry, University of Liège, CHU de Liège, Liège, Belgium
| | - Eric Sagou Yayo
- Département de Biochimie, UFR Sciences Pharmaceutiques et Biologiques, University Felix Houphouet Boigny, Abidjan, Côte d’Ivoire
- Service d’Hémodialyse Publique de Côte d’Ivoire, Abidjan, Côte d’Ivoire
| | - Marie-Laure Attoungbre-Hauhouot
- Département de Biochimie, UFR Sciences Pharmaceutiques et Biologiques, University Felix Houphouet Boigny, Abidjan, Côte d’Ivoire
- Service d’Hémodialyse Publique de Côte d’Ivoire, Abidjan, Côte d’Ivoire
- Institut de Cardiologie d’Abidjan, Abidjan, Côte d’Ivoire
| | - Jean-Louis Konan
- Département de Biochimie, UFR Sciences Pharmaceutiques et Biologiques, University Felix Houphouet Boigny, Abidjan, Côte d’Ivoire
- Service d’Hémodialyse Publique de Côte d’Ivoire, Abidjan, Côte d’Ivoire
- Institut de Cardiologie d’Abidjan, Abidjan, Côte d’Ivoire
| | - Carine Yao-Yapo
- Département de Biochimie, UFR Sciences Pharmaceutiques et Biologiques, University Felix Houphouet Boigny, Abidjan, Côte d’Ivoire
- Service d’Hémodialyse Publique de Côte d’Ivoire, Abidjan, Côte d’Ivoire
| | - Dagui Monnet
- Département de Biochimie, UFR Sciences Pharmaceutiques et Biologiques, University Felix Houphouet Boigny, Abidjan, Côte d’Ivoire
| | - Appolinaire Gnionsahé
- Service d’Hémodialyse Publique de Côte d’Ivoire, Abidjan, Côte d’Ivoire
- Institut de Cardiologie d’Abidjan, Abidjan, Côte d’Ivoire
- Département de Néphrologie, UFR Sciences Pharmaceutiques et Biologiques, University Felix Houphouet Boigny, Abidjan, Côte d’Ivoire
| | | | - Pierre Delanaye
- Department of Nephrology, Dialysis and Transplantation, University of Liège, CHU de Liège, Liège, Belgium
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Rosario PW, Calsolari MR. Serum PTH reference values in an adult Brazilian population: implications for the diagnosis of hyperparathyroidism. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2019; 63:182-185. [PMID: 30916167 PMCID: PMC10522136 DOI: 10.20945/2359-3997000000117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 01/16/2019] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To define serum parathyroid hormone (PTH) reference values in carefully selected subjects following the recommended pre-analytical guidelines. SUBJECTS AND METHODS First, 676 adults who would be submitted to thyroidectomy were evaluated. Patients using interfering medications or with malabsorption syndrome, hypomagnesemia, hyper- or hypophosphatemia, hypo- or hypercalcemia, 25-hydroxyvitamin D < 30 ng/dL, estimated glomerular filtration rate < 60 mL/min/1.73 m2, urinary calcium/creatinine ratio ≥ 0.25, thyroid dysfunction, parathyroid adenoma detected during surgery were excluded. The sample consisted of 312 subjects. RESULTS The median, minimum, maximum, and 2.5th and 97.5th percentiles of the PTH values obtained were 30, 7.2, 78, 10.1, and 52 pg/mL, respectively. Thus, the reference range was 10 to 52 pg/mL. PTH > 65 pg/mL, the upper limit of normal according to the manufacturer of the kit, was observed in only one subject (0.3%). Considering the upper limit proposed by the kit's manufacturer, 1/6 hypercalcemic patients and 4/8 normocalcemic patients with PHPT had normal PTH. Using the upper limit established in this study, only one normocalcemic patient had normal PTH. Thus, the sensitivity of PTH in detecting asymptomatic primary hyperparathyroidism (PHPT) using the values recommended by the kit and established in this study was 64% and 93%, respectively (50% versus 87.5% for normocalcemic PHPT). CONCLUSION The upper reference limit of PTH obtained for a rigorously selected sample was 20% lower than that provided by the assay, which increased its sensitivity in detecting PHPT.
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Affiliation(s)
- Pedro Weslley Rosario
- Santa Casa de Misericórdia de Belo HorizonteSanta Casa de Belo HorizonteBelo HorizonteMGBrasilSanta Casa de Belo Horizonte, Belo Horizonte, MG, Brasil
| | - Maria Regina Calsolari
- Santa Casa de Misericórdia de Belo HorizonteSanta Casa de Belo HorizonteBelo HorizonteMGBrasilSanta Casa de Belo Horizonte, Belo Horizonte, MG, Brasil
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Bassatne A, Chakhtoura M, Saad R, Fuleihan GEH. Vitamin D supplementation in obesity and during weight loss: A review of randomized controlled trials. Metabolism 2019; 92:193-205. [PMID: 30615949 DOI: 10.1016/j.metabol.2018.12.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 12/27/2018] [Accepted: 12/29/2018] [Indexed: 01/06/2023]
Abstract
Vitamin D deficiency is common in obese individuals and during weight loss. The recommended vitamin D doses in this specific population are higher than for healthy adults. We reviewed vitamin D supplementation trials in obesity, and during medical or surgical weight loss, and report the effects on 25-hydroxyvitamin D [25(OH)D] concentrations and other relevant outcomes. We conducted a systematic search in PubMed, Medline, Embase and the Cochrane library for relevant randomized controlled trials (RCTs) of oral vitamin D supplementation for at least 3 months in obese individuals without weight loss (OB), and those on medical weight loss (MWL) (2010-2018), and following bariatric surgery (Bar S) (without time restriction). Two reviewers screened the identified citations in duplicate and independently and performed full text screening. One reviewer completed data extraction. We identified 13 RCTs in OB, 6 in MWL and 7 in Bar S. Mean baseline 25(OH)D concentrations ranged between 7 and 27 ng/ml in OB, 15-29 ng/ml in MWL and 15-24 ng/ml in Bar S. In OB (Total N 2036 participants), vitamin D doses of 1600-4000 IU/d increased mean 25(OH)D concentrations to ≥30 ng/ml. Based on three trials during MWL (Total N 359 participants), vitamin D doses of 1200-4600 IU/d for 12 months increased 25(OH)D concentration to ≥30 ng/ml. In Bar S (Total N 615 participants), doses ≥2000 IU/d were needed to reach 30 ng/ml. The change in 25(OH)D concentration was inversely proportional to the administered dose, and to BMI and baseline level with doses of 600-3000 IU/day. With these doses, the change in 25(OH)D concentration [Δ25(OH)D] per 100 IU/d was 0.5-1.2 ng/ml. Three trials assessed bone mineral density as a primary outcome, but only one of them showed a protective effect of vitamin D against bone loss at all sites post-Bar S. There was no effect of vitamin D on weight loss. Data on extra-skeletal parameters, namely glycemic and vascular indices were mostly identified in OB, and findings were inconsistent. In conclusion, Vitamin D doses ≥1600-2000 IU/d may be needed to reach a 25(OH)D concentration of 30 ng/ml in obese individuals and following bariatric surgery. The optimal concentration in this population is unknown, and whether the above doses protect against weight loss induced bone loss and fractures still needs to be confirmed. There is no clear evidence for a beneficial effect of vitamin D supplementation on cardio-metabolic parameters in obese individuals, and data on such parameters with weight loss are very scarce. Well-designed long term RCTs assessing the effect of vitamin D supplementation during weight loss on patient important outcomes are needed.
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Affiliation(s)
- Aya Bassatne
- Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, Division of Endocrinology and Metabolism, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
| | - Marlene Chakhtoura
- Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, Division of Endocrinology and Metabolism, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
| | - Randa Saad
- Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, Division of Endocrinology and Metabolism, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
| | - Ghada El-Hajj Fuleihan
- Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, Division of Endocrinology and Metabolism, Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
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Minisola S, Pepe J, Donato P, Vigna E, Occhiuto M, Ferrone F, Biamonte F, Cecchetti V, Danese VC, Sonato C, BIondi P, Colangelo L, Cipriani C. Replenishment of vitamin D status: theoretical and practical considerations. Hormones (Athens) 2019; 18:3-5. [PMID: 29949127 DOI: 10.1007/s42000-018-0040-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/14/2018] [Indexed: 10/14/2022]
Affiliation(s)
- Salvatore Minisola
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy.
| | - Jessica Pepe
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Pietro Donato
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Evelina Vigna
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Marco Occhiuto
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Federica Ferrone
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Federica Biamonte
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Veronica Cecchetti
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Vittoria Carmela Danese
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Chiara Sonato
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Piergianni BIondi
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Luciano Colangelo
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
| | - Cristiana Cipriani
- Department of Internal Medicine and Medical Disciplines, "Sapienza", Rome University, Rome, Italy
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Chen H, Han X, Cui Y, Ye Y, Purrunsing Y, Wang N. Parathyroid Hormone Fragments: New Targets for the Diagnosis and Treatment of Chronic Kidney Disease-Mineral and Bone Disorder. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9619253. [PMID: 30627584 PMCID: PMC6304519 DOI: 10.1155/2018/9619253] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/22/2018] [Accepted: 10/28/2018] [Indexed: 12/28/2022]
Abstract
As a common disorder, chronic kidney disease (CKD) poses a great threat to human health. Chronic kidney disease-mineral and bone disorder (CKD-MBD) is a complication of CKD characterized by disturbances in the levels of calcium, phosphorus, parathyroid hormone (PTH), and vitamin D; abnormal bone formation affecting the mineralization and linear growth of bone; and vascular and soft tissue calcification. PTH reflects the function of the parathyroid gland and also takes part in the metabolism of minerals. The accurate measurement of PTH plays a vital role in the clinical diagnosis, treatment, and prognosis of patients with secondary hyperparathyroidism (SHPT). Previous studies have shown that there are different fragments of PTH in the body's circulation, causing antagonistic effects on bone and the kidney. Here we review the metabolism of PTH fragments; the progress being made in PTH measurement assays; the effects of PTH fragments on bone, kidney, and the cardiovascular system in CKD; and the predictive value of PTH measurement in assessing the effectiveness of parathyroidectomy (PTX). We hope that this review will help to clarify the value of accurate PTH measurements in CKD-MBD and promote the further development of multidisciplinary diagnosis and treatment.
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Affiliation(s)
- Huimin Chen
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu Province 210029, China
| | - Xiaxia Han
- Nanjing Medical University, Nanjing, Jiangsu Province 211166, China
| | - Ying Cui
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu Province 210029, China
| | - Yangfan Ye
- Nanjing Medical University, Nanjing, Jiangsu Province 211166, China
| | - Yogendranath Purrunsing
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu Province 210029, China
| | - Ningning Wang
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu Province 210029, China
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Hemmingway A, Kenny LC, Malvisi L, Kiely ME. Exploring the concept of functional vitamin D deficiency in pregnancy: impact of the interaction between 25-hydroxyvitamin D and parathyroid hormone on perinatal outcomes. Am J Clin Nutr 2018; 108:821-829. [PMID: 30169726 DOI: 10.1093/ajcn/nqy150] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/11/2018] [Indexed: 01/01/2023] Open
Abstract
Background Associations of vitamin D with perinatal outcomes are inconsistent and few studies have considered the wider calcium metabolic system. Objectives We aimed to explore functional vitamin D deficiency in pregnancy by investigating associations between vitamin D status, parathyroid hormone (PTH), and perinatal outcomes. Design SCOPE (Screening for Pregnancy Endpoints) Ireland is a prospective cohort study of low-risk, nulliparous pregnant women. We measured serum 25-hydroxyvitamin D [25(OH)D] and PTH at 15 wk of gestation in 1754 participants. Results Mean ± SD 25(OH)D was 56.6 ± 25.8 nmol/L (22.7 ± 10.3 ng/mL) and geometric mean (95% CI) PTH was 7.84 pg/mL (7.7, 8.0 pg/mL) [0.86 pmol/L (0.85, 0.88 pmol/L)]. PTH was elevated in 34.3% of women who had 25(OH)D <30 nmol/L and in 13.9% of those with 25(OH)D ≥75 nmol/L. Whereas 17% had 25(OH)D <30 nmol/L, 5.5% had functional vitamin D deficiency, defined as 25(OH)D <30 nmol/L with elevated PTH. Elevated mean arterial pressure (MAP), gestational hypertension, pre-eclampsia, and small-for-gestational-age (SGA) birth were confirmed in 9.2%, 11.9%, 3.8%, and 10.6% of participants, respectively. In fully adjusted regression models, neither low 25(OH)D nor elevated PTH alone increased the risk of any individual outcome. The prevalence of elevated MAP (19.1% compared with 9.7%) and SGA (16.0% compared with 6.7%) were highest (P < 0.05) in those with functional vitamin D deficiency compared with the reference group [25(OH)D ≥75 nmol/L and normal PTH]. The adjusted prevalence ratio (PR) and RR (95% CIs) for elevated MAP and SGA were 1.83 (1.02, 3.27) and 1.53 (0.80, 2.93), respectively. There was no effect of functional vitamin D deficiency on the risk of gestational hypertension (adjusted RR: 1.00; 95% CI: 0.60, 1.67) or pre-eclampsia (adjusted RR: 1.17; 95% CI: 0.32, 4.20). Conclusion The concept of functional vitamin D deficiency, reflecting calcium metabolic stress, should be considered in studies of vitamin D in pregnancy. The SCOPE pregnancy cohort is registered at http://www.anzctr.org.au as ACTRN12607000551493.
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Affiliation(s)
- Andrea Hemmingway
- Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland.,The Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland
| | - Louise C Kenny
- The Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland.,Department of Women's and Children's Health, University of Liverpool, Liverpool, United Kingdom
| | - Lucio Malvisi
- Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland.,The Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland
| | - Mairead E Kiely
- Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland.,The Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland
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Cavalier E, Salsé M, Dupuy AM, Bargnoux AS, Watar F, Souberbielle JC, Delanaye P, Cristol JP. Establishment of reference values in a healthy population and interpretation of serum PTH concentrations in hemodialyzed patients according to the KDIGO Guidelines using the Lumipulse® G whole PTH (3rd generation) assay. Clin Biochem 2018; 54:119-122. [PMID: 29501417 DOI: 10.1016/j.clinbiochem.2018.02.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 01/24/2023]
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Giannini S, Mazzaferro S, Minisola S, De Nicola L, Rossini M, Cozzolino M. Raising awareness on the therapeutic role of cholecalciferol in CKD: a multidisciplinary-based opinion. Endocrine 2018; 59:242-259. [PMID: 28726185 PMCID: PMC5846860 DOI: 10.1007/s12020-017-1369-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/27/2017] [Indexed: 12/19/2022]
Abstract
Vitamin D is recognized to play an essential role in health and disease. In kidney disease, vitamin D analogs have gained recognition for their involvement and potential therapeutic importance. Nephrologists are aware of the use of oral native vitamin D supplementation, however, uncertainty still exists with regard to the use of this treatment option in chronic kidney disease as well as clinical settings related to chronic kidney disease, where vitamin D supplementation may be an appropriate therapeutic choice. Two consecutive meetings were held in Florence in July and November 2016 comprising six experts in kidney disease (N = 3) and bone mineral metabolism (N = 3) to discuss a range of unresolved issues related to the use of cholecalciferol in chronic kidney disease. The panel focused on the following six key areas where issues relating to the use of oral vitamin D remain controversial: (1) vitamin D and parathyroid hormone levels in the general population, (2) cholecalciferol in chronic kidney disease, (3) vitamin D in cardiovascular disease, (4) vitamin D and renal bone disease, (5) vitamin D in rheumatological diseases affecting the kidney, (6) vitamin D and kidney transplantation.
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Affiliation(s)
- Sandro Giannini
- Department of Medicine, Clinica Medica 1, University of Padova, Padova, Italy
| | - Sandro Mazzaferro
- Department of Cardiovascular Respiratory Nephrologic Anesthetic and Geriatric Sciences, Sapienza University of Rome, Rome, Italy
| | - Salvatore Minisola
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy
| | - Luca De Nicola
- Division of Nephrology, Second University of Naples, Naples, Italy
| | - Maurizio Rossini
- Department of Medicine, Rheumatology Unit, University of Verona, Verona, Italy
| | - Mario Cozzolino
- Department of Health Sciences, Renal Division and Laboratory of Experimental Nephrology, San Paolo Hospital, University of Milan, Milan, Italy.
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Parnell KE, Oltmann SC. The surgical management of primary hyperparathyroidism: an updated review. INTERNATIONAL JOURNAL OF ENDOCRINE ONCOLOGY 2018. [DOI: 10.2217/ije-2017-0019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Patients with primary hyperparathyroidism often present clinically asymptomatic with various biochemical compositions of serum calcium, parathyroid hormone, vitamin D and urinary calcium. Understanding the subtle differences in clinical and biochemical presentations is key for timely diagnosis and referral to an experienced parathyroid surgeon. Surgery remains the only option for cure of primary hyperparathyroidism, which now favors a directed parathyroidectomy with intra-operative adjuncts. However it is important to understand and revise the surgical approach for patients with hereditary conditions or nonlocalizing studies. Revised guidelines from the Fourth International Workshop on the Management of Asymptomatic Primary Hyperparathyroidism in 2013 and the American Association of Endocrine Surgeons in 2016 are reviewed in this paper for an updated review of this condition.
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Affiliation(s)
- Kaela E Parnell
- Department of Surgery, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, E6.104B, Dallas, TX 75390–9092, USA
| | - Sarah C Oltmann
- Department of Surgery, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, E6.104B, Dallas, TX 75390–9092, USA
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Minisola S, Cianferotti L, Biondi P, Cipriani C, Fossi C, Franceschelli F, Giusti F, Leoncini G, Pepe J, Bischoff-Ferrari HA, Brandi ML. Correction of vitamin D status by calcidiol: pharmacokinetic profile, safety, and biochemical effects on bone and mineral metabolism of daily and weekly dosage regimens. Osteoporos Int 2017; 28:3239-3249. [PMID: 28815282 DOI: 10.1007/s00198-017-4180-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 07/27/2017] [Indexed: 01/28/2023]
Abstract
RATIONALE Calcidiol can be employed to correct vitamin D deficiency. MAIN RESULTS Calcidiol administered at daily and weekly regimens over a period of 3 months was able to successfully raise 25-hydroxyvitamin D levels without altering other markers related to bone and mineral metabolism. SIGNIFICANCE Calcidiol supplementation is effective and safe. INTRODUCTION The correction of vitamin D status is necessary to maintain an optimal mineral and skeletal homeostasis. Despite cholecalciferol (vitamin D3) is the most commonly used drug for vitamin D supplementation, the more hydrophilic compound calcidiol (25-hydroxyvitamin D3) can be employed at daily, weekly, and monthly regimens to reach in the short term the target levels of serum 25-hydroxyvitamin D [25(OH)D]. In the administration of different doses of calcidiol pharmacokinetic study (ADDI-D study), the efficacy and safety of daily and weekly dosages of calcidiol were tested. METHODS A total of 87 Caucasian, community-dwelling, postmenopausal women, aged 55 years or older, with vitamin D inadequacy (serum 25(OH)D levels <30 ng/ml, with mean 25(OH)D below 20 ng/ml, namely 16.5 ± 7.5 ng/ml) were randomized to receive three different dosages of calcidiol: 20 μg/day, 40 μg/day, and 125 μg/week for 3 months. The attained level of serum 25(OH)D was selected as primary endpoint to assess efficacy, while other parameters of mineral metabolism, (serum calcium, parathyroid hormone, phosphate, FGF23, urinary calcium, and markers of bone turnover) were assessed as secondary endpoints to establish safety. RESULTS In all the three groups, serum 25(OH)D values significantly and promptly rose and plateaued above the 30 ng/ml threshold remaining within safety interval after 14 days of treatment, with similar efficacy for the similar daily and weekly dose regimens. The different dosages were also equally effective in controlling secondary hyperparathyroidism. No significant changes in calcium and phosphate metabolism and in bone turnover markers were observed for any of the treatments, confirming the safety of this compound. CONCLUSIONS The results of this study demonstrate the short- and mid-term efficacy and safety on core parameters of mineral metabolism of different daily or weekly dosages of calcidiol when used to treat vitamin D inadequacy or deficiency in postmenopausal women. Further studies are needed to assess falls as primary outcome of calcidiol supplementation.
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Affiliation(s)
- S Minisola
- Department of Internal Medicine and Medical Disciplines, "Sapienza", University of Rome, Rome, Italy
| | - L Cianferotti
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - P Biondi
- Department of Internal Medicine and Medical Disciplines, "Sapienza", University of Rome, Rome, Italy
| | - C Cipriani
- Department of Internal Medicine and Medical Disciplines, "Sapienza", University of Rome, Rome, Italy
| | - C Fossi
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - F Franceschelli
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - F Giusti
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - G Leoncini
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - J Pepe
- Department of Internal Medicine and Medical Disciplines, "Sapienza", University of Rome, Rome, Italy
| | - H A Bischoff-Ferrari
- Department of Geriatrics and Aging Research, University Hospital and University of Zurich, Zürich, Switzerland
| | - M L Brandi
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy.
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Dionigi G, Tufano RP, Russell J, Kim HY, Piantanida E, Anuwong A. Transoral thyroidectomy: advantages and limitations. J Endocrinol Invest 2017; 40:1259-1263. [PMID: 28432675 DOI: 10.1007/s40618-017-0676-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 04/10/2017] [Indexed: 01/29/2023]
Abstract
In this opinion paper of the Journal of Endocrinological Investigation, leading experts in the field report on their current clinical experience with a novel approach for thyroid gland surgery, namely, "transoral thyroidectomy" (TOT). This feasible and novel surgical procedure does not require visible incisions and is, therefore, a truly scarless surgery. Patients meeting the following criteria can be considered as candidates for TOT: (a) an ultrasonographically (US) estimated thyroid diameter ≤10 cm; (b) US-estimated gland volume ≤45 mL; (c) nodule size ≤50 mm; (d) presence of a benign tumor such as a thyroid cyst or a single- or multi-nodular goiter; (e) Bethesda 3 and/or 4 category and (f) papillary microcarcinoma without the evidence of metastasis. The procedure is conducted via a three-port technique at the oral vestibule using a 10-mm port for the 30° endoscope and two additional 5-mm ports for the dissecting and coagulating instruments. TOT is performed using conventional endoscopic instruments and is probably the best scarless approach to the thyroid because of the short distance between the thyroid and the incisions placed intra-orally that do not result in any cutaneous scar and upon following the surgical planes. Experts in TOT organized a working group of general, endocrine, head and neck ENT surgeons and endocrinologist to develop the standards for practicing this emerging technique.
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Affiliation(s)
- G Dionigi
- 1st Division of General Surgery, Department of Surgical Sciences and Human Morphology, Research Center for Endocrine Surgery, University of Insubria (Varese-Como), via Guicciardini, 9, 21100, Varese, Italy
| | - R P Tufano
- Division of Head and Neck Endocrine Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - J Russell
- Division of Head and Neck Endocrine Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - H Y Kim
- Division of Breast and Endocrine Surgery, Department of Surgery, Minimally Invasive Surgery and Robotic Surgery Center, KUMC Thyroid Center Korea University, Anam Hospital, Seoul, 08308, Korea.
| | - E Piantanida
- Endocrine Unit, Department of Medicine and Surgery, University of Insubria, ASST dei Sette Laghi, Viale Borri, 57, 21100, Varese, Italy
| | - A Anuwong
- Minimally Invasive and Endocrine Division, Department of Surgery, Police General Hospital, Bangkok, Thailand
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42
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Association between Parathyroid Hormone, 25 (OH) Vitamin D, and Chronic Kidney Disease: A Population-Based Study. BIOMED RESEARCH INTERNATIONAL 2017; 2017:7435657. [PMID: 28367447 PMCID: PMC5359435 DOI: 10.1155/2017/7435657] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/25/2017] [Accepted: 02/14/2017] [Indexed: 12/20/2022]
Abstract
Identification of the accurate risk factor for CKD remains mandatory to combat the high prevalence of diseases. Growing evidence suggests the association of serum vitamin D with diverse health conditions. However, the relationship between vitamin D, intact parathyroid hormone (PTH), and calcium-phosphate metabolism and development of CKD remains controversial. We conduct this cross-sectional observational study to investigate the association between serum 25 (OH) vitamin D, intact PTH, and calcium and phosphate levels with eGFR and albuminuria, as a surrogate marker of CKD, in a community population. A total of 4080 participants were recruited. The mean age was 58.4 ± 13.3 years and 1480 (36.3%) were men. The mean eGFR was 94.1 ± 26.3 mL/min/1.73 m2. The prevalence of CKD was 19.8%. Serum 25 (OH) vitamin D and log intact PTH levels were inversely correlated with eGFR but positively correlated with log albuminuria. Logistic regression analysis identified the log intact PTH as an independent factor associated with eGFR ≤ 60 mL/min/1.73 m2 and proteinuria. This association was consistent when serum intact PTH was analyzed as continuous as well as categorical variables (as hyperparathyroidism). The relationship remains significant using resampling subset analysis with comparable baseline characteristics and adjustment for 25 (OH) vitamin D, calcium, and phosphate levels. This finding warranted further research to clarify the causal relationship of PTH/25 (OH) vitamin D with the risk of CKD in the general population.
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Sturgeon CM, Sprague S, Almond A, Cavalier E, Fraser WD, Algeciras-Schimnich A, Singh R, Souberbielle JC, Vesper HW. Perspective and priorities for improvement of parathyroid hormone (PTH) measurement - A view from the IFCC Working Group for PTH. Clin Chim Acta 2016; 467:42-47. [PMID: 27746210 DOI: 10.1016/j.cca.2016.10.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 11/15/2022]
Abstract
Parathyroid hormone (PTH) measurement in serum or plasma is a necessary tool for the exploration of calcium/phosphate disorders, and is widely used as a surrogate marker to assess skeletal and mineral disorders associated with chronic kidney disease (CKD), referred to as CKD-bone mineral disorders (CKD-MBD). CKD currently affects >10% of the adult population in the United States and represents a major health issue worldwide. Disturbances in mineral metabolism and fractures in CKD patients are associated with increased morbidity and mortality. Appropriate identification and management of CKD-MBD is therefore critical to improving clinical outcome. Recent increases in understanding of the complex pathophysiology of CKD, which involves calcium, phosphate and magnesium balance, and is also influenced by vitamin D status and fibroblast growth factor (FGF)-23 production, should facilitate such improvement. Development of evidence-based recommendations about how best to use PTH is limited by considerable method-related variation in results, of up to 5-fold, as well as by lack of clarity about which PTH metabolites these methods recognise. This makes it difficult to compare PTH results from different studies and to develop common reference intervals and/or decision levels for treatment. The implications of these method-related differences for current clinical practice are reviewed here. Work being undertaken by the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) to improve the comparability of PTH measurements worldwide is also described.
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Affiliation(s)
- Catharine M Sturgeon
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK.
| | - Stuart Sprague
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
| | - Alison Almond
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
| | - Etienne Cavalier
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
| | - William D Fraser
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
| | | | - Ravinder Singh
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
| | | | - Hubert W Vesper
- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
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- C/o Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
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