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Iannone F, Angotti E, Lucia F, Martino L, Antico GC, Galato F, Aversa I, Gallo R, Giordano C, Abatino A, Mancuso S, Carinci LG, Martucci M, Teti C, Costanzo F, Cuda G, Palmieri C. The biological variation of serum 1,25-dihydroxyvitamin D and parathyroid hormone, and plasma fibroblast growth factor 23 in healthy individuals. Clin Chim Acta 2024; 557:117863. [PMID: 38471629 DOI: 10.1016/j.cca.2024.117863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/14/2024]
Abstract
BACKGROUND AND AIMS Measuring 1,25-dihydroxyvitamin D (1,25(OH)2D), parathyroid hormone 1-84 (PTH 1-84) and intact FGF23 (iFGF23) is crucial for diagnosing a variety of diseases affecting bone and mineral homeostasis. Biological variability (BV) data are important for defining analytical quality specifications (APS), the usefulness of reference intervals, and the significance of variations in serial measurements in the same subject. The aim of this study was to pioneer the provision of BV estimates for 1,25(OH)2D and to improve existing BV estimates for iFGF23 and PTH 1-84. MATERIALS AND METHODS Serum and plasma-EDTA samples of sixteen healthy subjects have been collected for seven weeks and measured in duplicate by chemiluminescent immunoassay on the DiaSorin Liaison platform. After variance verification, within-subject (CVI) and between-subject (CVG) BV estimates were assessed by either standard ANOVA, or CV-ANOVA. The APSs were calculated according to the EFLM-BV-model. RESULTS We found the following CVI estimates with 95% confidence intervals:1,25(OH)2D, 22.2% (18.9-26.4); iFGF23, 16.1% (13.5-19.5); and PTH 1-84, 17.9% (14.8-21.8). The CVG were: 1,25(OH)2D, 21.2% (14.2-35.1); iFGF23, 21.1% (14.5-35.8); and PTH 1-84, 31.1% (22.1-50.8). CONCLUSIONS We report for the first time BV estimates for 1,25(OH)2D and enhance existing data about iFGF23-BV and PTH 1-84-BV through cutting-edge immunometric methods.
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Affiliation(s)
- Francesca Iannone
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy
| | - Elvira Angotti
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Fortunata Lucia
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Luisa Martino
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Giulio Cesare Antico
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Francesco Galato
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Ilenia Aversa
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy
| | - Raffaella Gallo
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy
| | - Caterina Giordano
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy
| | - Antonio Abatino
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy
| | - Serafina Mancuso
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | | | - Maria Martucci
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Consuelo Teti
- Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Francesco Costanzo
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy; Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Giovanni Cuda
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy; Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy
| | - Camillo Palmieri
- Department of Clinical and Experimental Medicine, University Magna Grecia of Catanzaro, viale Europa, 88100 Catanzaro, Italy; Laboratory of Clinical Biochemistry, AOU "Renato Dulbecco" Hospital, 88100 Catanzaro, Italy.
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Vitamin D supplementation and immune-related markers: an update from nutrigenetic and nutrigenomic studies. Br J Nutr 2022; 128. [PMCID: PMC9557210 DOI: 10.1017/s0007114522002392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Vitamin D is both a nutrient and a neurologic hormone that plays a critical role in modulating immune responses. While low levels of vitamin D are associated with increased susceptibility to infections and immune-related disorders, vitamin D supplementation has demonstrated immunomodulatory effects that can be protective against various diseases and infections. Vitamin D receptor is expressed in immune cells that have the ability to synthesise the active vitamin D metabolite. Thus, vitamin D acts in an autocrine manner in a local immunologic milieu in fighting against infections. Nutrigenetics and nutrigenomics are the new disciplines of nutritional science that explore the interaction between nutrients and genes using distinct approaches to decipher the mechanisms by which nutrients can influence disease development. Though molecular and observational studies have proved the immunomodulatory effects of vitamin D, only very few studies have documented the molecular insights of vitamin D supplementation. Until recently, researchers have investigated only a few selected genes involved in the vitamin D metabolic pathway that may influence the response to vitamin D supplementation and possibly disease risk. This review summarises the impact of vitamin D supplementation on immune markers from nutrigenetics and nutrigenomics perspective based on evidence collected through a structured search using PubMed, EMBASE, Science Direct and Web of Science. The research gaps and shortcomings from the existing data and future research direction of vitamin D supplementation on various immune-related disorders are discussed.
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Munar A, Clinton Frazee C, Garg U. Quantification of 25-Hydroxyvitamin D2 and D3 Using Liquid Chromatography-Tandem Mass Spectrometry. Methods Mol Biol 2022; 2546:539-544. [PMID: 36127620 DOI: 10.1007/978-1-0716-2565-1_48] [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: 11/29/2022]
Abstract
Vitamin D plays an important role not only in bone health but also in many other body functions. Vitamin D deficiency is very common in the general population. Measurement of blood 25-hydroxyvitamin D is a common practice to evaluate vitamin D deficiency. Immunoassays and liquid chromatography tandem mass spectrometry (LC-MS/MS) are the most commonly used methods for the measurement of 25-hydroxyvitamin D. Immunoassays suffer from specificity issues and do not distinguish between 25-hydroxyvitamin D2 and D3. Therefore, LC-MS/MS is a preferred method for quantification of 25-hydroxyvitamin. We describe an LC-MS/MS method, which involves protein precipitation and analysis of the extract using atmospheric pressure chemical ionization and multiple reaction monitoring. 25-hydroxyvitamin D3-d6 is used as an internal standard. The method is linear from 1-100 ng/mL for both 25-hydroxyvitamin D2 and D3 and has imprecision of <10%.
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Affiliation(s)
- Ada Munar
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO, USA.,University of Missouri School of Medicine, Kansas City, MO, USA
| | - C Clinton Frazee
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO, USA.,University of Missouri School of Medicine, Kansas City, MO, USA
| | - Uttam Garg
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO, USA. .,University of Missouri School of Medicine, Kansas City, MO, USA.
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Total 25(OH)D Concentration Moderates the Association between Caffeine Consumption and the Alkaline Phosphatase Level in Pregnant Women. Nutrients 2022; 14:nu14081616. [PMID: 35458179 PMCID: PMC9032703 DOI: 10.3390/nu14081616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/30/2022] [Accepted: 04/10/2022] [Indexed: 02/04/2023] Open
Abstract
The evidence as to whether caffeine consumption is beneficial or harmful to human health has been mixed. This study aimed to examine the effect of 25-hydroxyvitamin D (25(OH)D) concentration on the association between caffeine consumption and mineral metabolism in pregnant women. This is a cross-sectional study involving pregnant women at their 25th to 35th gestational week recruited at antenatal clinics in the period of July 2019 to December 2020. Peripheral blood samples were collected to determine their total 25(OH)D, albumin, alkaline phosphatase (ALP), calcium, phosphate, and ferritin level in serum. Questionnaires on demographics and dietary intake were also administered. Among 181 pregnant women recruited (Average age = 32.9 years), 50 (27.6%) of them were found to be vitamin D insufficient (25(OH)D concentration < 75 nmol/L), and 131 (72.4%) were vitamin D sufficient (25(OH)D concentration ≥ 75 nmol/L). Adjusted regression models identified an association between higher caffeine intake and lower ALP level only among vitamin D-sufficient pregnant women (β = −0.24, p = 0.006), but not in those with insufficient vitamin D (β = −0.02, p = 0.912). The findings provide new insights into 25(OH)D concentration as a potential modifier of the health effects of caffeine consumption during pregnancy.
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Papadopoulou A, Bountouvi E, Karachaliou FE. The Molecular Basis of Calcium and Phosphorus Inherited Metabolic Disorders. Genes (Basel) 2021; 12:genes12050734. [PMID: 34068220 PMCID: PMC8153134 DOI: 10.3390/genes12050734] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/30/2021] [Accepted: 05/05/2021] [Indexed: 02/07/2023] Open
Abstract
Calcium (Ca) and Phosphorus (P) hold a leading part in many skeletal and extra-skeletal biological processes. Their tight normal range in serum mirrors their critical role in human well-being. The signalling “voyage” starts at Calcium Sensing Receptor (CaSR) localized on the surface of the parathyroid glands, which captures the “oscillations” of extracellular ionized Ca and transfers the signal downstream. Parathyroid hormone (PTH), Vitamin D, Fibroblast Growth Factor (FGF23) and other receptors or ion-transporters, work synergistically and establish a highly regulated signalling circuit between the bone, kidneys, and intestine to ensure the maintenance of Ca and P homeostasis. Any deviation from this well-orchestrated scheme may result in mild or severe pathologies expressed by biochemical and/or clinical features. Inherited disorders of Ca and P metabolism are rare. However, delayed diagnosis or misdiagnosis may cost patient’s quality of life or even life expectancy. Unravelling the thread of the molecular pathways involving Ca and P signaling, we can better understand the link between genetic alterations and biochemical and/or clinical phenotypes and help in diagnosis and early therapeutic intervention.
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