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De Souza Silverio C, Bonilla C. Vitamin D-associated genetic variants in the Brazilian population: Investigating potential instruments for Mendelian randomization. Biomedica 2024; 44:45-53. [PMID: 38648345 DOI: 10.7705/biomedica.6972] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 01/30/2024] [Indexed: 04/25/2024]
Abstract
INTRODUCTION Vitamin D is required for bone and mineral metabolism and participates in the regulation of the immune response. It is also linked to several chronic diseases and conditions, usually in populations of European descent. Brazil presents a high prevalence of vitamin D deficiency and insufficiency despite the widespread availability of sunlight in the country. Thus, it is important to investigate the role of vitamin D as a risk factor for disease and to establish causal relationships between vitamin D levels and health-related outcomes in the Brazilian population. OBJECTIVE To examine genetic variants identified as determinants of serum vitamin D in genome-wide association studies of European populations and check whether the same associations are present in Brazil. If so, these single nucleotide polymorphisms (SNPs) could be developed locally as proxies to use in genetically informed causal inference methods, such as Mendelian randomization. MATERIALS AND METHODS We extracted SNPs associated with vitamin D from the genomewide association studies catalog. We did a literature search to select papers ascertaining these variants and vitamin D concentrations in Brazil. RESULTS GC was the gene with the strongest association with vitamin D levels, in agreement with existing findings in European populations. However, VDR was the most investigated gene, regardless of its non-existing association with vitamin D in the genomewide association studies. CONCLUSIONS More research is needed to validate sound proxies for vitamin D levels in Brazil, for example, prioritizing GC rather than VDR.
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Affiliation(s)
- Caroline De Souza Silverio
- Departamento de Medicina Preventiva, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil; Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, Brasil
| | - Carolina Bonilla
- Departamento de Medicina Preventiva, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
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2
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Koretz RL. JPEN Journal Club 78. Response-adaptive randomization. JPEN J Parenter Enteral Nutr 2024; 48:128-130. [PMID: 37376916 DOI: 10.1002/jpen.2541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 06/27/2023] [Indexed: 06/29/2023]
Affiliation(s)
- Ronald L Koretz
- UCLA Medical Center Olive View, Sylmar, California, USA
- University of California David Geffen School of Medicine, Los Angeles, California, USA
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3
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Borkowski J, Stefaniak T, Cych P. Changes in Skeletal Muscle Troponin T and Vitamin D Binding Protein (DBP) Concentrations in the Blood of Male Amateur Athletes Participating in a Marathon and 100 km Adventure Race. Int J Environ Res Public Health 2023; 20:ijerph20095692. [PMID: 37174210 PMCID: PMC10178111 DOI: 10.3390/ijerph20095692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/07/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023]
Abstract
This study assessed changes in creatine kinase (CK) activity and skeletal muscle troponin T (sTnT) concentrations in the blood, to estimate the degree of muscle degradation after exercise. In addition, the concentration of vitamin D binding protein (DBP) in the blood was assessed. DBP concentrations were measured in blood as a marker for plasma load by monomeric actin. The study included marathon (MR) participants and 100 km adventure race (AR) participants, who were examined before and after the race. There was a significant (16-fold) increase in CK activity among AR participants, and a significant increase in sTnT concentration-127% in the MR group and 113% in the AR group, while there was a statistically significant decrease in DBP concentration by 14% in the AR group. In addition, it was observed that the initial concentration of DBP in both groups was in a normal range, but was lower than the average population, and the DBP concentration in the AR group was lower than in the MR group. It was concluded that exhausting physical effort such as a marathon or adventure races causes muscle damage with a far stronger influence on sarcoplasm than on filaments. The short-term and slight reduction in the concentration of DBP in blood after such efforts may be due to the appearance of monomeric actin in plasma.
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Affiliation(s)
- Jacek Borkowski
- Department of Physiology and Biochemistry, Wroclaw University of Health and Sport Sciences, 35 J.I. Paderewski Avenue, 51-612 Wroclaw, Poland
| | - Tadeusz Stefaniak
- Department of Immunology, Pathophysiology and Veterinary Preventive Medicine, Wrocław University of Environmental and Life Sciences, C.K. Norwida 31 Str, 50-375 Wrocław, Poland
| | - Piotr Cych
- Department of Sport Didactics, Wroclaw University of Health and Sport Sciences, 35 J.I. Paderewski Avenue, 51-612 Wroclaw, Poland
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Lisowska-Myjak B, Skarżyńska E, Wróbel M, Mańka G, Kiecka M, Lipa M, Warzecha D, Spaczyński R, Piekarski P, Banaszewska B, Jakimiuk A, Issat T, Rokita W, Młodawski J, Szubert M, Sieroszewski P, Raba G, Szczupak K, Kluz T, Kluza M, Wielgoś M, Laudański P. Investigation of the Changes in Concentrations of Vitamin D-Binding Protein and Lactoferin in Plasma and Peritoneal Fluid of Patients with Endometriosis. Int J Mol Sci 2023; 24:ijms24097828. [PMID: 37175534 PMCID: PMC10178223 DOI: 10.3390/ijms24097828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 05/15/2023] Open
Abstract
An evaluation of the association between the concentrations of vitamin D-binding protein and lactoferrin in the plasma and peritoneal fluid may facilitate the elucidation of molecular mechanisms in endometriosis. Vitamin D-binding protein and lactoferrin concentrations were measured by ELISA in plasma and peritoneal fluid samples from 95 women with suspected endometriosis as classified by laparoscopy into groups with (n = 59) and without endometriosis (n = 36). There were no differences (p > 0.05) in the plasma and peritoneal fluid concentrations of vitamin D-binding protein and lactoferrin between women with and without endometriosis. In women with endometriosis, there was a significant correlation between plasma and peritoneal fluid vitamin D-binding protein concentrations (r = 0.821; p = 0.000), but there was no correlation between lactoferrin concentrations in those compartments (r = 0.049; p > 0.05). Furthermore, in endometriosis, lactoferrin was found to correlate poorly with vitamin D-binding protein (r= -0.236; p > 0.05) in plasma, while in the peritoneal fluid, the correlation between those proteins was significant (r = 0.399; p = 0.002). The characteristic properties of vitamin D-binding protein and lactoferrin and the associations between their plasma and peritoneal fluid concentrations found in women with endometriosis may provide a novel panel of markers to identify high-risk patients in need of further diagnostic measures.
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Affiliation(s)
- Barbara Lisowska-Myjak
- Department of Biochemistry and Phatmacogenomics, Medical University of Warsaw, 02-097 Warsaw, Poland
| | - Ewa Skarżyńska
- Department of Laboratory Medicine, Medical University of Warsaw, 02-097 Warsaw, Poland
| | - Monika Wróbel
- 1st Department of Obstetrics and Gynecology, Medical University of Warsaw, 02-015 Warsaw, Poland
| | | | | | - Michał Lipa
- City South Hospital Warsaw, 02-781 Warsaw, Poland
| | - Damian Warzecha
- City South Hospital Warsaw, 02-781 Warsaw, Poland
- OVIklinika Infertility Center, 01-377 Warsaw, Poland
| | - Robert Spaczyński
- Center for Gynecology, Obstetrics and Infertility Treatment Pastelova, 60-198 Poznan, Poland
| | - Piotr Piekarski
- Division of Infertility and Reproductive Endocrinology, Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, 61-701 Poznan, Poland
| | - Beata Banaszewska
- Chair and Department of Laboratory Diagnostics, Poznan University of Medical Sciences, 61-701 Poznan, Poland
| | - Artur Jakimiuk
- Department of Reproductive Health, Insitute of Mother and Child in Warsaw, 01-211 Warsaw, Poland
- Department of Obstetrics and Gynecology, Central Clinical Hospital of the Ministry of Interior, 02-507 Warsaw, Poland
| | - Tadeusz Issat
- Department of Obstetrics and Gynecology, Insitute of Mother and Child in Warsaw, 01-211 Warsaw, Poland
| | - Wojciech Rokita
- Collegium Medicum, Jan Kochanowski University in Kielce, 25-369 Kielce, Poland
- Clinic of Obstetrics and Gynecology, Provincial Combined Hospital in Kielce, 25-736 Kielce, Poland
| | - Jakub Młodawski
- Collegium Medicum, Jan Kochanowski University in Kielce, 25-369 Kielce, Poland
- Clinic of Obstetrics and Gynecology, Provincial Combined Hospital in Kielce, 25-736 Kielce, Poland
| | - Maria Szubert
- Department of Gynecology and Obstetrics, Medical University of Lodz, 90-419 Lodz, Poland
- Department of Surgical Gynecology and Oncology, Medical University of Lodz, 90-419 Lodz, Poland
| | - Piotr Sieroszewski
- Department of Gynecology and Obstetrics, Medical University of Lodz, 90-419 Lodz, Poland
- Department of Fetal Medicine and Gynecology, Medical University of Lodz, 90-419 Lodz, Poland
| | - Grzegorz Raba
- Clinic of Obstetric and Gynecology in Przemysl, 37-700 Przemysl, Poland
- Department of Obstetrics and Gynecology, University of Rzeszow, 35-310 Rzeszow, Poland
| | - Kamil Szczupak
- Clinic of Obstetric and Gynecology in Przemysl, 37-700 Przemysl, Poland
- Department of Obstetrics and Gynecology, University of Rzeszow, 35-310 Rzeszow, Poland
| | - Tomasz Kluz
- Department of Gynecology, Gynecology Oncology and Obstetrics, Institute of Medical Sciences, Medical College of Rzeszow University, 35-310 Rzeszow, Poland
| | - Marek Kluza
- Department of Gynecology, Gynecology Oncology and Obstetrics, Institute of Medical Sciences, Medical College of Rzeszow University, 35-310 Rzeszow, Poland
| | - Mirosław Wielgoś
- Premium Medical Clinic, 04-359 Warsaw, Poland
- Lazarski University, 02-662 Warsaw, Poland
| | - Piotr Laudański
- OVIklinika Infertility Center, 01-377 Warsaw, Poland
- Department of Obstetrics, Gynecology and Gynecological Oncology, Medical University of Warsaw, 02-091 Warsaw, Poland
- Women's Health Research Institute, Calisia University, 62-800 Kalisz, Poland
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5
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Marañón-Vásquez G, Küchler EC, Hermann S, Paddenberg E, Schröder A, Baratto-Filho F, Flores-Mir C, Proff P, Kirschneck C. Association between genetic variants in key vitamin-D-pathway genes and external apical root resorption linked to orthodontic treatment. Eur J Oral Sci 2023; 131:e12916. [PMID: 36683003 DOI: 10.1111/eos.12916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 12/31/2022] [Indexed: 01/24/2023]
Abstract
This study evaluated the association between single-nucleotide polymorphisms (SNPs) in vitamin-D-related genes and the amount of external apical root resorption linked to orthodontic treatment. One hundred and forty-three individuals were assessed. The amount of external apical root resorption of upper central incisors (EARRinc ) and lower first molars (EARRmol ) were evaluated in radiographs. Seven SNPs were genotyped across four genes including the vitamin D receptor [VDR], group-specific component [GC], cytochrome P450 family 27 subfamily B member 1 [CYP27B1], and cytochrome P450 family 24 subfamily A member 1 [CYP24A1]. Linear regressions were implemented to determine allele-effects on external apical root resorption. Individuals carrying the AA genotype in VDR rs2228570 had a 21% higher EARRmol than those having AG and GG genotypes (95% CI: 1.03,1.40). EARRmol in heterozygous rs2228570, was 12% lower than for homozygotes (95%CI: 0.78,0.99). Participants with the CCG haplotype (rs1544410-rs7975232-rs731236) in VDR had an EARRmol 16% lower than those who did not carry this haplotype. Regarding CYP27B1 rs4646536, EARRinc in participants who had at least one G allele was 42% lower than for homozygotes AA (95%CI: 0.37,0.93). Although these results did not remain significant after multiple testing adjustment, potential associations may still be suggested. Further replication studies are needed to confirm or refute these findings.
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Affiliation(s)
- G Marañón-Vásquez
- Department of Pediatric Dentistry, and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - E C Küchler
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - S Hermann
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - E Paddenberg
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - A Schröder
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - F Baratto-Filho
- Department of Dentistry, School of Dentistry, Univille - University of the Joinville Region, Joinville, Santa Catarina, Brazil
| | - C Flores-Mir
- Division of Orthodontics, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - P Proff
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - C Kirschneck
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
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Dos Santos LM, Ohe MN, Pallone SG, Nacaguma IO, Kunii IS, da Silva REC, Maeda SS, Vieira JGH, Lazaretti-Castro M. Levels of bioavailable, and free forms of 25(OH)D after supplementation with vitamin D 3 in primary hyperparathyroidism. Endocrine 2023; 80:183-190. [PMID: 36574149 DOI: 10.1007/s12020-022-03265-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 11/16/2022] [Indexed: 12/29/2022]
Abstract
The 25 hydroxyvitamin D [25(OH)D] is the major metabolite for ascertaining vitamin D status, which circulates bound to a specific carrier (vitamin D-binding protein - VDBP). A portion that circulates unbound vary according to the VDBP genotype. This study evaluates the behavior of different forms of 25(OH)D, before and after supplementation with 14,000 IU of vitamin D3, weekly for 12 weeks, in individuals with primary hyperparathyroidism and controls. Fifty-six patients with active primary hyperparathyroidism (PHPT) and 64 paired controls (CTRL), not taking vitamin D3 for the last three months, were enrolled. The genetic isotypes of VDBP were determined to calculate bioavailable and free 25(OH)D. A p < 0.05 was considered significant. There were no statistical differences in free, bioavailable, and total 25(OH)D levels between PHPT and CTRL groups at baseline. The distribution of VDBP haplotypes 1s/1s, 1f/1f, 1s/1f, 2/2, 1s/2, and 1f/2 was similar between groups. After supplementation, all three forms of 25(OH)D proportionally increased within each group, although the percentage increment was lower in the PHPT group (p < 0.05). Total 25(OH)D is better correlated with PTH in the PHPT group than bioavailable and free 25(OH)D (r = -0.41; p < 0.05). The concentrations of total, free, and bioavailable 25(OH)D were similar in both PHPT and CTRL groups, and all forms increased proportionally after supplementation, although this increment percentage was higher in the CTRL group, with a subsequent reduction of PTH and AP. Total 25(OH)D correlated better with PTH than other forms, suggesting no advantages in measuring free or bioavailable 25(OH)D in these situations.
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Affiliation(s)
- Lívia Marcela Dos Santos
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil.
| | - Monique Nakayama Ohe
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Sthefanie Giovanna Pallone
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Isabela Ohki Nacaguma
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Ilda Sizue Kunii
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Renata Elen Costa da Silva
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Sergio Setsuo Maeda
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | | | - Marise Lazaretti-Castro
- Department of Medicine, Endocrinology Unit, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
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7
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Charoenngam N, Jaroenlapnopparat A, Mettler SK, Grover A. Genetic Variations of the Vitamin D Metabolic Pathway and COVID-19 Susceptibility and Severity: Current Understanding and Existing Evidence. Biomedicines 2023; 11:biomedicines11020400. [PMID: 36830936 PMCID: PMC9953304 DOI: 10.3390/biomedicines11020400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/20/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023] Open
Abstract
The immunomodulatory and metabolic effects of vitamin D receptor (VDR) activation have been considered beneficial in mitigating the susceptibility and severity of COVID-19 infection. Furthermore, vitamin D-binding protein (DBP) has pleiotropic effects on the immune system that may influence inflammation associated with COVID-19. Multiple observational studies have demonstrated an association between low levels of serum 25-hydroxyvitamin D and risk and the severity of COVID-19 infection. However, the impact of vitamin D supplementation as an adjunctive treatment for COVID-19 based on evidence from randomized clinical trials is unclear. Equally important is that certain variations of the genes involved in the vitamin D metabolic pathway have been shown to affect immune function and linked with various clinical outcomes, including cardio-metabolic disorders, autoimmune diseases, infections, and cancers. This indicates inter-individual difference in body response to vitamin D. There is also emerging evidence that common polymorphisms of these genes may influence the susceptibility and severity of COVID-19, although the confidence of these findings is limited by a small number of studies and participants. Further studies are needed to address the potential role of VDR activation and DBP in the pathophysiology of COVID-19 which take into account the genetic variations of vitamin D metabolic pathway.
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Affiliation(s)
- Nipith Charoenngam
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, MA 02138, USA
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 73170, Thailand
- Correspondence: ; Tel.: +1-617-492-3500
| | | | - Sofia K. Mettler
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, MA 02138, USA
| | - Ashna Grover
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, MA 02138, USA
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Kilpatrick LE, Bouillon R, Davis WC, Henderson CM, Hoofnagle AN, Pauwels S, Vanderschueren D, Waelkens E, Wildiers H, Yen JH, Phinney KW. The influence of proteoforms: assessing the accuracy of total vitamin D-binding protein quantification by proteolysis and LC-MS/MS. Clin Chem Lab Med 2023; 61:78-85. [PMID: 36279170 DOI: 10.1515/cclm-2022-0642] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 09/26/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Vitamin D-binding protein (VDBP), a serum transport protein for 25-hydroxyvitamin D [25(OH)D], has three common proteoforms which have co-localized amino acid variations and glycosylation. A monoclonal immunoassay was found to differentially detect VDBP proteoforms and methods using liquid chromatography-tandem mass spectrometry (LC-MS/MS) might be able to overcome this limitation. Previously developed multiple reaction monitoring LC-MS/MS methods for total VDBP quantification represent an opportunity to probe the potential effects of proteoforms on proteolysis, instrument response and quantification accuracy. METHODS VDBP was purified from homozygous human donors and quantified using proteolysis or acid hydrolysis and LC-MS/MS. An interlaboratory comparison was performed using pooled human plasma [Standard Reference Material® 1950 (SRM 1950) Metabolites in Frozen Human Plasma] and analyses with different LC-MS/MS methods in two laboratories. RESULTS Several shared peptides from purified proteoforms were found to give reproducible concentrations [≤2.7% coefficient of variation (CV)] and linear instrument responses (R2≥0.9971) when added to human serum. Total VDBP concentrations from proteolysis or amino acid analysis (AAA) of purified proteoforms had ≤1.92% CV. SRM 1950, containing multiple proteoforms, quantified in two laboratories resulted in total VDBP concentrations with 7.05% CV. CONCLUSIONS VDBP proteoforms were not found to cause bias during quantification by LC-MS/MS, thus demonstrating that a family of proteins can be accurately quantified using shared peptides. A reference value was assigned for total VDBP in SRM 1950, which may be used to standardize methods and improve the accuracy of VDBP quantification in research and clinical samples.
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Affiliation(s)
- Lisa E Kilpatrick
- Material Measurement Laboratory, Biomolecular Measurement Division, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Roger Bouillon
- Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism and Ageing, KU Leuven, Leuven, Belgium
| | - W Clay Davis
- Hollings Marine Laboratory, National Institute of Standards and Technology, Charleston, SC, USA
| | - Clark M Henderson
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA.,Seagen, Inc., Bothell, WA, USA
| | - Andrew N Hoofnagle
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Steven Pauwels
- Department of Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Dirk Vanderschueren
- Department of Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Etienne Waelkens
- Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Hans Wildiers
- Department of General Medical Oncology, University Hospitals Leuven, Leuven, Belgium
| | - James H Yen
- Statistical Engineering Division, Information Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Karen W Phinney
- Material Measurement Laboratory, Biomolecular Measurement Division, National Institute of Standards and Technology, Gaithersburg, MD, USA
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Zhu A, Kuznia S, Niedermaier T, Holleczek B, Schöttker B, Brenner H. Vitamin D-binding protein, total, "nonbioavailable," bioavailable, and free 25-hydroxyvitamin D, and mortality in a large population-based cohort of older adults. J Intern Med 2022; 292:463-476. [PMID: 35373871 DOI: 10.1111/joim.13494] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Epidemiological studies consistently find low concentrations of 25-hydroxyvitamin D (25(OH)D) in blood to be associated with increased mortality, and a recent large-scale Mendelian randomization study strongly supports a causal relationship among individuals with low vitamin D status. Evolving evidence suggested that bioavailable or free 25(OH)D may better predict mortality. We aimed to compare the prognostic values of vitamin D-binding protein (VDBP), total, bioavailable, complementary "nonbioavailable", and free 25(OH)D for total and cause-specific mortality in a large population-based cohort study of older adults from Germany. METHODS Bioavailable, complementary "nonbioavailable", and free 25(OH)D concentrations were calculated among 5899 participants aged 50-75 years, based on serum concentrations of total 25(OH)D, VDBP, and albumin. The cohort was followed with respect to total and cause-specific mortality from recruitment in 2001-2002 up to the end of 2018. Multivariable Cox proportional hazards regression models were used to assess the associations between various vitamin D biomarkers and mortality, and further stratified by vitamin D status. RESULTS During a median follow-up of 17.1 years, 1739 participants died, of whom 575, 584, and 94 died of cardiovascular diseases, cancer, and respiratory diseases, respectively. Very similar inverse associations with total mortality (hazard ratio (HR) per standard deviation decrease: 1.17, 95% confidence interval (CI): 1.11, 1.24 for total 25(OH)D; HR: 1.14, 95% CI: 1.08, 1.21 for bioavailable 25(OH)D; HR: 1.12, 95% CI: 1.06, 1.18 for free 25(OH)D) and cause-specific mortalities were seen for all biomarkers of vitamin D status. The strongest associations were consistently seen for respiratory mortality. These inverse associations were strongest among participants with low vitamin D levels (<50 nmol/L). No significant associations were seen between VDBP and mortality. CONCLUSIONS Total, nonbioavailable, bioavailable, and free 25(OH)D showed very similar inverse associations with total and cause-specific mortality, which were strongest among those with low vitamin D status in this large population-based cohort.
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Affiliation(s)
- Anna Zhu
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Sabine Kuznia
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Tobias Niedermaier
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | - Ben Schöttker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Network Aging Research, Heidelberg University, Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Network Aging Research, Heidelberg University, Heidelberg, Germany.,Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany.,German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
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10
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Povaliaeva A, Bogdanov V, Pigarova E, Dzeranova L, Katamadze N, Malysheva N, Ioutsi V, Nikankina L, Rozhinskaya L, Mokrysheva N. Impaired Vitamin D Metabolism in Hospitalized COVID-19 Patients. Pharmaceuticals (Basel) 2022; 15:ph15080906. [PMID: 35893730 PMCID: PMC9330123 DOI: 10.3390/ph15080906] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/13/2022] [Accepted: 07/16/2022] [Indexed: 12/12/2022] Open
Abstract
There is increasing data regarding the association between vitamin D and COVID-19. This study aimed to reveal the alterations of vitamin D metabolism in the setting of COVID-19. We examined 119 adult COVID-19 inpatients and 44 apparently healthy adult individuals with similar serum 25OH-D3 levels as a reference group. The assessment included serum biochemical parameters (total calcium, albumin, phosphorus, creatinine), parathyroid hormone (PTH), vitamin D-binding protein (DBP), vitamin D metabolites (25OH-D3, 25OH-D2, 1,25(OH)2D3, 3-epi-25OH-D3, 24,25(OH)2D3 and D3) and free 25OH-D. COVID-19 patients had in general very low vitamin D levels (median 25OH-D3 equals 10.8 ng/mL), accompanied by an increased production of the active vitamin D metabolite (1,25(OH)2D3), estimated as higher 1,25(OH)2D3 serum levels (61 [44; 81] vs. 40 [35; 50] pg/mL, p < 0.001) and lower 25OH-D3/1,25(OH)2D3 ratio (175 [112; 260] vs. 272 [200; 433], p < 0.001) which is presumably aimed at preventing hypocalcemia. Patients with COVID-19 also had elevated DBP (450 [386; 515] vs. 392 [311; 433] mg/L, p < 0.001) and low free 25OH-D levels (<LoB vs. 3.9 [3.2; 4.4] pg/mL, p < 0.001). Follow-up assessment of the COVID-19 inpatients showed recovery of the observed changes. Overall, hospitalized patients with an acute course of COVID-19 have not only very low levels of 25OH-D but also profound abnormalities in the metabolism of vitamin D regardless of the clinical course of the disease. These alterations might exacerbate existing vitamin D deficiency and its negative impact.
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Cho MC, Cho IA, Seo HK, Kang MJ, Jo JY, Shin JK, Lee SA, Kim SC, Kim RB, Choi WJ. Serum vitamin D-binding protein (VDBP) concentration and rs7041 genotype may be associated with preterm labor. J Matern Fetal Neonatal Med 2022; 35:9422-9429. [PMID: 35188037 DOI: 10.1080/14767058.2022.2040475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE Vitamin D deficiency is common during pregnancy and may cause complications such as preterm labor (PTL). This study was aimed to investigate the effect of the vitamin D-binding protein (VDBP) rs7041 genotype, which has a significant effect on vitamin D metabolism and PTL. METHODS This cross-sectional study was conducted with 32 pregnant women who had spontaneous PTL and 54 pregnant women who had no specific findings as a control group. Serum total vitamin D 25-hydroxy vitamin D (25(OH)D) levels were measured using the Elecsys Vitamin D Total Kit. VDBP was measured using a VDBP Quantikine ELISA Kit. The levels of bioavailable 25(OH)D were calculated based on the total 25(OH)D and VDBP concentrations. DNA was extracted using the DNeasy Blood and Tissue Kit. Single nucleotide polymorphisms (rs7041) in GC were analyzed using a TaqMan SNP Genotyping Assay Kit. The unpaired t-test, Chi-squared, and ANCOVA tests were performed. Firth's penalized logistic regression was applied. The area under the curve (AUC) was calculated and the cutoff value was determined. All statistical analyses were performed using R version 4.0.3 (R Foundation for Statistical Computing, Vienna, Austria). RESULTS Total 25(OH)D levels were not significantly different between the two groups. Bioavailable 25(OH)D was significantly decreased in PTL women (p= .011), and VDBP was significantly increased in PTL women (p= .004) compared to the controls. Bioavailable 25(OH)D was lower in women with GT/TG and TT rs7041 genotypes than in those with GG, with statistical significance in women with the TT allele (p= .048). VDBP was higher in women with GT/TG and TT than those with GG, but there was no statistical significance. In PTL prevalence, bioavailable 25(OH)D and VDBP, the odds ratio increased by 1.463 times in GT/TG (p= .728) and increased by 1.675 times in TT compared to the GG allele (p= .640). In receiver operating characteristic (ROC) analysis for bioavailable 25(OH)D and VDBP, the AUC was 0.665 and 0685, respectively. The optimum cutoff of bioavailable 25(OH)D and VDBP levels for the diagnosis of PTL was calculated as 0.6 ng/mL and 523 µg/mL, respectively. CONCLUSIONS Pregnant women with the VDBP rs7041(c.1296 T > G) T allele genotype had reduced serum levels of bioavailable 25(OH)D and were more likely to develop PTL. Therefore, if the T allele is found in the VDBP rs7041 SNP genotyping test before or during pregnancy, more careful prenatal care may be required because of the increased risk of PTL.
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Affiliation(s)
- Min-Chul Cho
- Department of Laboratory Medicine, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea.,Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - In Ae Cho
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea.,Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Hyun Kyoung Seo
- Department of Obstetrics and Gynecology, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Min Ji Kang
- Department of Obstetrics and Gynecology, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Jae Yoon Jo
- Department of Obstetrics and Gynecology, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Jeong Kyu Shin
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea.,Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Soon Ae Lee
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea.,Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Seung Chan Kim
- Biostatistics Cooperation Center, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Rock-Bum Kim
- Biostatistics Cooperation Center, Gyeongsang National University Hospital, Jinju, Republic of Korea.,Department of Preventive Medicine, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Won Jun Choi
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea.,Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
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12
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Vandikas MS, Landin-Wilhelmsen K, Gillstedt M, Osmancevic A. Vitamin D-Binding Protein and the Free Hormone Hypothesis for Vitamin D in Bio-Naïve Patients with Psoriasis. Int J Mol Sci 2022; 23:1302. [PMID: 35163226 DOI: 10.3390/ijms23031302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/18/2022] [Accepted: 01/21/2022] [Indexed: 01/04/2023] Open
Abstract
High levels of vitamin D-binding protein (DBP) have been reported in patients with psoriasis and the possibility of DBP as a marker of inflammation has been discussed. Furthermore, high DBP levels might negatively affect free 25(OH)D concentrations. According to the free hormone hypothesis, only the free fraction of a steroid hormone is capable of exerting biological action. Thus, free 25(OH)D level could be a better biomarker of vitamin D status than total 25(OH)D level. The objectives of this study were to identify the strongest determinants for DBP levels and to test the free hormone hypothesis for vitamin D in psoriasis. Additionally, we also aimed to investigate correlations between directly measured free 25(OH)D levels in serum and psoriasis disease severity compared to total 25(OH)D levels. This was a retrospective cross-sectional study including 40 bio-naïve patients with mild to severe plaque psoriasis. Psoriasis disease severity was evaluated using high sensitivity C-reactive protein (hsCRP), Psoriasis Area Severity Index (PASI) and visual analogue scale (VAS). Vitamin D metabolites including directly measured free 25(OH)D and serum DBP levels were measured. DBP levels were higher in patients with self-reported arthropathy than those without irrespective of confounding factors like sex, age and body weight. Total and free 25(OH)D levels correlated well (ρ = 0.77, p < 0.0001) and both were inversely correlated to intact parathyroid hormone (iPTH) (ρ = −0.33, p = 0.038 for total 25(OH)D and ρ = −0.40, p = 0.010 for free 25(OH)D). Only total 25(OH)D correlated to serum calcium levels (ρ = 0.32, p = 0.047). No correlations between any of the vitamin D metabolites and psoriasis disease severity were observed. In conclusion, DBP might be a new inflammatory biomarker in psoriasis, especially in psoriatic arthritis. Total 25(OH)D was a reliable measure for vitamin D status in this psoriasis cohort. However, evaluation of free 25(OH)D in patients with psoriatic disease and multiple co-morbidities and/or ongoing biologic treatment should be considered.
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13
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Choe Y, Lee YJ, Kim JH, Lee K, Shin CH, Lee YA, Song J. Free, bioavailable 25-hydroxyvitamin D levels and their association with diabetic ketoacidosis in children with type 1 diabetes at diagnosis. Front Endocrinol (Lausanne) 2022; 13:997631. [PMID: 36339444 PMCID: PMC9631212 DOI: 10.3389/fendo.2022.997631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 10/03/2022] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Considering the roles of 25-hydroxyvitamin D (25OHD) in glucose homeostasis and immune modulation, vitamin D deficiency may be related to the development of type 1 diabetes (T1DM) and diabetic ketoacidosis (DKA). We evaluated the total, free, bioavailable 25OHD levels and vitamin D binding protein (VDBP) levels and genotypes between T1DM patients and controls. METHODS This retrospective, cross-sectional study included 84 children with T1DM (38 boys and 46 girls, 8.0 ± 3.6 years) and 1:1 age- and sex-matched healthy controls. A multiplex liquid chromatography-tandem mass spectrometry-based assay was used to simultaneously measure vitamin D metabolites. RESULTS Patients with T1DM had lower levels of total 25OHD (16.3 ± 5.1 vs. 19.9 ± 6.5 ng/mL, P< 0.001) and VDBP (146.0 ± 27.8 vs. 224.9 ± 36.1 µg/mL, P = 0.001), but higher free 25OHD (8.0 ± 2.5 vs. 6.5 ± 2.3 pg/mL, P< 0.001) than controls. Patients who presented with DKA had lower levels of 25OHD in the total (15.0 ± 4.6 vs. 17.6 ± 5.2 ng/mL, P = 0.020), free (7.5 ± 2.6 vs. 8.4 ± 2.4 pg/mL, P = 0.059), and bioavailable (2.3 ± 0.9 vs. 2.8 ± 0.8 ng/mL, P = 0.014) forms than those without DKA at the T1DM diagnosis. The lower the total, free, and bioavailable 25OHD levels at diagnosis, the lower the pH and HCO3-. The proportions of the VDBP genotypes did not differ between the patients and controls. CONCLUSION Patients with T1DM had higher levels of free 25OHD than healthy children, despite lower levels of total 25OHD. However, patients with DKA exhibited lower levels of bioavailable 25OHD than those without DKA at the T1DM diagnosis. The lower the concentrations of free and bioavailable 25OHD, the more severe the acidosis at the initial T1DM presentation.
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Affiliation(s)
- Yunsoo Choe
- Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Yun Jeong Lee
- Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Jae Hyun Kim
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Kyunghoon Lee
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Choong Ho Shin
- Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul, South Korea
- *Correspondence: Young Ah Lee, ; Junghan Song,
| | - Junghan Song
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
- *Correspondence: Young Ah Lee, ; Junghan Song,
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14
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Povaliaeva A, Bogdanov V, Pigarova E, Zhukov A, Dzeranova L, Belaya Z, Rozhinskaya L, Mel’nichenko G, Mokrysheva N. Assessment of Vitamin D Metabolism in Patients with Cushing's Disease in Response to 150,000 IU Cholecalciferol Treatment. Nutrients 2021; 13:nu13124329. [PMID: 34959880 PMCID: PMC8704048 DOI: 10.3390/nu13124329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/26/2021] [Accepted: 11/27/2021] [Indexed: 12/12/2022] Open
Abstract
In this study we aimed to assess vitamin D metabolism in patients with Cushing’s disease (CD) compared to healthy individuals in the setting of bolus cholecalciferol treatment. The study group included 30 adults with active CD and the control group included 30 apparently healthy adults with similar age, sex and BMI. All participants received a single dose (150,000 IU) of cholecalciferol aqueous solution orally. Laboratory assessments including serum vitamin D metabolites (25(OH)D3, 25(OH)D2, 1,25(OH)2D3, 3-epi-25(OH)D3 and 24,25(OH)2D3), free 25(OH)D, vitamin D-binding protein (DBP) and parathyroid hormone (PTH) as well as serum and urine biochemical parameters were performed before the intake and on Days 1, 3 and 7 after the administration. All data were analyzed with non-parametric statistics. Patients with CD had similar to healthy controls 25(OH)D3 levels (p > 0.05) and higher 25(OH)D3/24,25(OH)2D3 ratios (p < 0.05) throughout the study. They also had lower baseline free 25(OH)D levels (p < 0.05) despite similar DBP levels (p > 0.05) and lower albumin levels (p < 0.05); 24-h urinary free cortisol showed significant correlation with baseline 25(OH)D3/24,25(OH)2D3 ratio (r = 0.36, p < 0.05). The increase in 25(OH)D3 after cholecalciferol intake was similar in obese and non-obese states and lacked correlation with BMI (p > 0.05) among patients with CD, as opposed to the control group. Overall, patients with CD have a consistently higher 25(OH)D3/24,25(OH)2D3 ratio, which is indicative of a decrease in 24-hydroxylase activity. This altered activity of the principal vitamin D catabolism might influence the effectiveness of cholecalciferol treatment. The observed difference in baseline free 25(OH)D levels is not entirely clear and requires further study.
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15
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Zhu A, Kuznia S, Niedermaier T, Holleczek B, Schöttker B, Brenner H. Distribution and Determinants of Vitamin D-Binding Protein, Total, "Non-Bioavailable", Bioavailable, and Free 25-Hydroxyvitamin D Concentrations among Older Adults. Nutrients 2021; 13:nu13113982. [PMID: 34836237 PMCID: PMC8624653 DOI: 10.3390/nu13113982] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 01/25/2023] Open
Abstract
Background: serum 25-hydroxyvitamin D (25(OH)D) (“total 25 OH(D)”) is the most commonly used indicator of vitamin D status. However, 25(OH)D is mostly bound to the vitamin D binding protein (VDBP) or albumin in blood, and it has been suggested that the remaining bioavailable or free 25(OH)D may be more relevant for vitamin D associated health outcomes. We aimed to explore distributions and determinants of VDBP, total, bioavailable, complementary “non-bioavailable”, and free 25(OH)D in a large cohort of older adults in Germany. Methods: total 25(OH)D, VDBP, and albumin concentrations were measured in blood samples of 5899 men and women aged 50–75 years and used to calculate bioavailable (and complementary “non-bioavailable”) and free 25(OH)D concentrations. Linear regression models were used to evaluate associations of potential determinants of the various vitamin D biomarkers. Results: mean concentrations of VDBP, total, non-bioavailable, bioavailable, and free 25(OH)D were 323.6 µg/mL, 49.8 nmol/L, 43.4 nmol/L, 2.5 ng/mL, and 5.7 pg/mL, respectively. Seasonal variations were observed for all markers, with peak values in spring for VDBP and in summer for total, non-bioavailable, bioavailable, and free 25(OH)D. Consistent inverse associations were seen with age and body mass index for all markers, but divergent associations were seen with C-reactive protein. Strong variations by VDBP genotypes were seen for bioavailable and free 25(OH)D, and, in opposite direction for non-bioavailable 25(OH)D. Conclusion: commonalities and differences in determinants of various markers of vitamin D status were observed, which may help to enable a better understanding of their potential role for various vitamin D related health outcomes.
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Affiliation(s)
- Anna Zhu
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (A.Z.); (S.K.); (T.N.); (B.S.)
- Medical Faculty Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Sabine Kuznia
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (A.Z.); (S.K.); (T.N.); (B.S.)
- Medical Faculty Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Tobias Niedermaier
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (A.Z.); (S.K.); (T.N.); (B.S.)
| | | | - Ben Schöttker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (A.Z.); (S.K.); (T.N.); (B.S.)
- Network Aging Research, Heidelberg University, 69115 Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (A.Z.); (S.K.); (T.N.); (B.S.)
- Network Aging Research, Heidelberg University, 69115 Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), 69120 Heidelberg, Germany
- German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Correspondence: ; Tel.: +49-622-142-1300
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16
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Aristarco V, Johansson H, Gandini S, Macis D, Zanzottera C, Tolva G, Feroce I, Accornero C, Bonanni B, Guerrieri-Gonzaga A, Serrano D. Association of Vitamin D Receptor and Vitamin D-Binding Protein Polymorphisms with Familial Breast Cancer Prognosis in a Mono-Institutional Cohort. Nutrients 2021; 13:nu13041208. [PMID: 33917614 PMCID: PMC8067530 DOI: 10.3390/nu13041208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 12/14/2022] Open
Abstract
Low 25-hydroxyvitamin D (25OHD) has been associated with an increased cancer incidence and poorer prognosis. Single nucleotide polymorphisms (SNPs) of vitamin D receptor (VDR) and vitamin D binding protein (GC gene) may interfere with vitamin D activity. This study assesses the role of VDR and GC SNPs on breast cancer (BC) recurrence and survival in a cohort of patients with a family history of breast cancer, without the pathogenic variant for BRCA1 and BRCA2. A consecutive series of patients who underwent genetic testing were genotyped for VDR and GC genes. Specifically, ApaI, FokI, TaqI, BsmI and rs2282679, rs4588, rs7041 SNPs were determined. A total of 368 wild type (WT) patients with BC were analyzed for VDR and GC SNPs. The GC rs2282679 minor allele was significantly associated with luminal subtype of the primary tumor compared to Her2+/TN breast cancer (p = 0.007). Multivariate Cox models showed that BmsI and TaqI are significantly associated with BC outcome. Patients with the major alleles showed more than 30% lower hazard of relapse (BsmI p = 0.02 and TaqI p = 0.03). Our study supports the evidence for a pivotal role of 25OHD metabolism in BC. GC SNPs may influence the hormone tumor responsiveness and VDR may affect tumor prognosis.
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Affiliation(s)
- Valentina Aristarco
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
- Correspondence: ; Tel.: +39-02-9437-2010; Fax: +39-02-9437-9225
| | - Harriet Johansson
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Sara Gandini
- Department of Experimental Oncology, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy;
| | - Debora Macis
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Cristina Zanzottera
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Gianluca Tolva
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Irene Feroce
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Chiara Accornero
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Bernardo Bonanni
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Aliana Guerrieri-Gonzaga
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
| | - Davide Serrano
- Division of Cancer Prevention and Genetics, European Institute of Oncology (IEO) IRCCS, 20141 Milan, Italy; (H.J.); (D.M.); (C.Z.); (G.T.); (I.F.); (C.A.); (B.B.); (A.G.-G.); (D.S.)
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Viloria K, Hewison M, Hodson DJ. Vitamin D binding protein/GC-globulin: a novel regulator of alpha cell function and glucagon secretion. J Physiol 2021; 600:1119-1133. [PMID: 33719063 DOI: 10.1113/jp280890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/05/2021] [Indexed: 12/24/2022] Open
Abstract
The contribution of glucagon to type 1 and type 2 diabetes has long been known, but the underlying defects in alpha cell function are not well-described. During both disease states, alpha cells respond inappropriately to stimuli, leading to dysregulated glucagon secretion, impaired glucose tolerance and hypoglycaemia. The mechanisms involved in this dysfunction are complex, but possibly include changes in alpha cell glucose-sensing, alpha cell de-differentiation, paracrine feedback, as well as alpha cell mass. However, the molecular underpinnings of alpha cell failure are still poorly understood. Recent transcriptomic analyses have identified vitamin D binding protein (DBP), encoded by GC/Gc, as an alpha cell signature gene. DBP is highly localized to the liver and alpha cells and is virtually absent from other tissues and cell types under non-pathological conditions. While the vitamin D transportation role of DBP is well characterized in the liver and circulation, its function in alpha cells remains more enigmatic. Recent work reveals that loss of DBP leads to smaller and hyperplastic alpha cells, which secrete less glucagon in response to low glucose concentration, despite vitamin D sufficiency. Alpha cells lacking DBP display impaired Ca2+ fluxes and Na+ conductance, as well as changes in glucagon granule distribution. Underlying these defects is an increase in the ratio of cytoskeletal F-actin to G-actin, highlighting a novel intracellular actin scavenging role for DBP in islets.
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Affiliation(s)
- Katrina Viloria
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Birmingham, B15 2TT, UK.,Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, B15 2TT, UK.,Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham, Birmingham, UK
| | - Martin Hewison
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Birmingham, B15 2TT, UK.,Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, B15 2TT, UK
| | - David J Hodson
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Birmingham, B15 2TT, UK.,Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, B15 2TT, UK.,Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham, Birmingham, UK
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Wu J, Lin S, Liu S, Wan B, Lin Y, Wang M, Zhu Y. The association between vitamin D-related gene polymorphisms and hepatitis B virus-related liver cirrhosis. J Int Med Res 2021; 48:300060520910906. [PMID: 32264749 PMCID: PMC7144674 DOI: 10.1177/0300060520910906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Objectives To investigate the relationship between vitamin D-related gene single nucleotide polymorphisms (SNPs) and hepatitis B-related liver cirrhosis. Methods This study included patients with chronic hepatitis B who were admitted to the Liver Research Center of the First Affiliated Hospital of Fujian Medical University from July 2012 to August 2016. SNPs rs1544410 and rs2228570 in the vitamin D receptor gene and rs2282679 in the vitamin D-binding protein gene were detected using the imLDR™ multiple SNP typing kit. Genotype and allele frequencies were compared between groups using the chi-square test or Fisher’s exact test. Results A total of 226 patients with hepatitis B virus (HBV) infection were enrolled, including 116 with HBV-related cirrhosis and 110 patients without. The distributions of vitamin D-related gene SNPs in both groups were in accordance with the Hardy–Weinberg equilibrium. There was no significant difference in the frequency or allelic distributions of rs1544410, rs2228570, and rs2282679 between the two groups. Additionally, the SNPs were not associated with the severity of cirrhosis. Conclusion No significant connection was identified between vitamin D-related SNPs and HBV-related liver cirrhosis.
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Affiliation(s)
- Jiali Wu
- Liver Research Center of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Su Lin
- Liver Research Center of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Shiying Liu
- Liver Research Center of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Bo Wan
- Faculty of Life Science and Medicine, King's College, London, UK
| | - Yehong Lin
- Liver Research Center of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Mingfang Wang
- Liver Research Center of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Yueyong Zhu
- Liver Research Center of the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
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Handy A, Lord J, Green R, Xu J, Aarsland D, Velayudhan L, Hye A, Dobson R, Proitsi P. Assessing Genetic Overlap and Causality Between Blood Plasma Proteins and Alzheimer's Disease. J Alzheimers Dis 2021; 83:1825-1839. [PMID: 34459398 PMCID: PMC8609677 DOI: 10.3233/jad-210462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND Blood plasma proteins have been associated with Alzheimer's disease (AD), but understanding which proteins are on the causal pathway remains challenging. OBJECTIVE Investigate the genetic overlap between candidate proteins and AD using polygenic risk scores (PRS) and interrogate their causal relationship using bi-directional Mendelian randomization (MR). METHODS Following a literature review, 31 proteins were selected for PRS analysis. PRS were constructed for prioritized proteins with and without the apolipoprotein E region (APOE+/-PRS) and tested for association with AD status across three cohorts (n = 6,244). An AD PRS was also tested for association with protein levels in one cohort (n = 410). Proteins showing association with AD were taken forward for MR. RESULTS For APOE ɛ3, apolipoprotein B-100, and C-reactive protein (CRP), protein APOE+ PRS were associated with AD below Bonferroni significance (pBonf, p < 0.00017). No protein APOE- PRS or AD PRS (APOE+/-) passed pBonf. However, vitamin D-binding protein (protein PRS APOE-, p = 0.009) and insulin-like growth factor-binding protein 2 (AD APOE- PRS p = 0.025, protein APOE- PRS p = 0.045) displayed suggestive signals and were selected for MR. In bi-directional MR, none of the five proteins demonstrated a causal association (p < 0.05) in either direction. CONCLUSION Apolipoproteins and CRP PRS are associated with AD and provide a genetic signal linked to a specific, accessible risk factor. While evidence of causality was limited, this study was conducted in a moderate sample size and provides a framework for larger samples with greater statistical power.
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Affiliation(s)
- Alex Handy
- University College London, Institute of Health Informatics, London, UK
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
| | - Jodie Lord
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
| | - Rebecca Green
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
- NIHR Maudsley Biomedical Research Centre, South London and Maudsley NHS Trust, London, UK
| | - Jin Xu
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
- Institute of Pharmaceutical Science, King’s College London, UK
| | - Dag Aarsland
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
- Center for Age-Related Medicine, Stavanger University Hospital, Norway
| | - Latha Velayudhan
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
| | - Abdul Hye
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
| | - Richard Dobson
- University College London, Institute of Health Informatics, London, UK
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
- NIHR Maudsley Biomedical Research Centre, South London and Maudsley NHS Trust, London, UK
- Health Data Research UK London, University College London, London, UK
- NIHR Biomedical Research Centre at University College London Hospitals NHS Foundation Trust, London, UK
| | - Petroula Proitsi
- King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
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Povaliaeva A, Pigarova E, Zhukov A, Bogdanov V, Dzeranova L, Mel'nikova O, Pekareva E, Malysheva N, Ioutsi V, Nikankina L, Rozhinskaya L. Evaluation of Vitamin D Metabolism in Patients with Type 1 Diabetes Mellitus in the Setting of Cholecalciferol Treatment. Nutrients 2020; 12:E3873. [PMID: 33352890 DOI: 10.3390/nu12123873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 11/16/2022] Open
Abstract
In this prospective controlled study, we examined 25 adults with adequately controlled (HbA1c level < 8.0%) type 1 diabetes mellitus (T1DM) and 49 conditionally healthy adults, intending to reveal the diversity of vitamin D metabolism in the setting of cholecalciferol intake at a therapeutic dose. All patients received a single dose (150,000 IU) of cholecalciferol aqueous solution orally. Laboratory assessments including serum vitamin D metabolites (25(OH)D3, 25(OH)D2, 1,25(OH)2D3, 3-epi-25(OH)D3 and 24,25(OH)2D3), free 25(OH)D, vitamin D-binding protein (DBP) and parathyroid hormone (PTH) as well as serum and urine biochemical parameters were performed before the intake and on Days 1, 3 and 7 after the administration. The studied groups had no significant differences in baseline parameters except that the patients with diabetes showed higher baseline levels of free 25(OH)D (p < 0.05). They also lacked a correlation between the measured and calculated free 25(OH)D in contrast to the patients from the control group (r = 0.41, p > 0.05 vs. r = 0.88, p < 0.05), possibly due to the glycosylation of binding proteins, which affects the affinity constant for 25(OH)D. The elevation of vitamin D levels after the administration of cholecalciferol was comparable in both groups, with slightly higher 25(OH)D3 levels observed in the diabetes group throughout the study since Day 1 (p < 0.05). Overall, our data indicate that in patients with adequately controlled T1DM 25(OH)D3 levels and the therapeutic response to cholecalciferol is similar to that in healthy individuals.
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Blakeley M, Sobczyńska-Malefora A, Carpenter G. The Origins of Salivary Vitamin A, Vitamin B 12 and Vitamin D-Binding Proteins. Nutrients 2020; 12:E3838. [PMID: 33339130 DOI: 10.3390/nu12123838] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 11/16/2022] Open
Abstract
Vitamin A- (retinol), vitamin B12- (haptocorrin) and vitamin D-binding proteins are the major circulatory transporters of their respective ligands; they are also constituents of the salivary proteome, the origins of which, remain unclear. The aim of this study was to explore how these proteins enter saliva and their relationship (if any) with vitamin status. Firstly, the three vitamin-binding proteins were quantified in resting whole mouth saliva and chewing-stimulated saliva from healthy donors (n = 10) to determine if they enter the mouth by salivary secretion or from the circulation. Secondly paired whole mouth saliva and serum samples were analysed from healthy donors (n = 14) to determine the relationships between the vitamin-binding proteins and vitamin status. Salivary output of all three vitamin-binding proteins studied increased when secretion was stimulated, suggesting they are secreted by the salivary glands. Whilst retinol-binding protein and haptocorrin were secreted by all major salivary glands, vitamin D-binding protein was restricted to the mucus glands. Salivary vitamin-binding protein concentrations were not found to be indicative of systemic vitamin status.
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Rybchyn MS, Abboud M, Puglisi DA, Gordon-Thomson C, Brennan-Speranza TC, Mason RS, Fraser DR. Skeletal Muscle and the Maintenance of Vitamin D Status. Nutrients 2020; 12:nu12113270. [PMID: 33114526 PMCID: PMC7692087 DOI: 10.3390/nu12113270] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/13/2020] [Accepted: 10/21/2020] [Indexed: 12/13/2022] Open
Abstract
Vitamin D, unlike the micronutrients, vitamins A, E, and K, is largely obtained not from food, but by the action of solar ultraviolet (UV) light on its precursor, 7-dehydrocholesterol, in skin. With the decline in UV light intensity in winter, most skin production of vitamin D occurs in summer. Since no defined storage organ or tissue has been found for vitamin D, it has been assumed that an adequate vitamin D status in winter can only be maintained by oral supplementation. Skeletal muscle cells have now been shown to incorporate the vitamin D-binding protein (DBP) from blood into the cell cytoplasm where it binds to cytoplasmic actin. This intracellular DBP provides an array of specific binding sites for 25-hydroxyvitamin D (25(OH)D), which diffuses into the cell from the extracellular fluid. When intracellular DBP undergoes proteolytic breakdown, the bound 25(OH)D is then released and diffuses back into the blood. This uptake and release of 25(OH)D by muscle accounts for the very long half-life of this metabolite in the circulation. Since 25(OH)D concentration in the blood declines in winter, its cycling in and out of muscle cells appears to be upregulated. Parathyroid hormone is the most likely factor enhancing the repeated cycling of 25(OH)D between skeletal muscle and blood. This mechanism appears to have evolved to maintain an adequate vitamin D status in winter.
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Affiliation(s)
- Mark S. Rybchyn
- Department of Physiology, School of Medical Sciences and Bosch Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (M.S.R.); (M.A.); (D.A.P.); (C.G.-T.); (T.C.B.-S.); (R.S.M.)
| | - Myriam Abboud
- Department of Physiology, School of Medical Sciences and Bosch Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (M.S.R.); (M.A.); (D.A.P.); (C.G.-T.); (T.C.B.-S.); (R.S.M.)
- Department of Health Sciences, College of Natural and Health Sciences, Zayed University, Dubai, Abu Dhabi P.O. Box 144534, UAE
| | - David A. Puglisi
- Department of Physiology, School of Medical Sciences and Bosch Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (M.S.R.); (M.A.); (D.A.P.); (C.G.-T.); (T.C.B.-S.); (R.S.M.)
| | - Clare Gordon-Thomson
- Department of Physiology, School of Medical Sciences and Bosch Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (M.S.R.); (M.A.); (D.A.P.); (C.G.-T.); (T.C.B.-S.); (R.S.M.)
| | - Tara C. Brennan-Speranza
- Department of Physiology, School of Medical Sciences and Bosch Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (M.S.R.); (M.A.); (D.A.P.); (C.G.-T.); (T.C.B.-S.); (R.S.M.)
- School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Rebecca S. Mason
- Department of Physiology, School of Medical Sciences and Bosch Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; (M.S.R.); (M.A.); (D.A.P.); (C.G.-T.); (T.C.B.-S.); (R.S.M.)
| | - David R. Fraser
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia
- Correspondence: ; Tel.: +61-2-93512139
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Fernando M, Ellery SJ, Marquina C, Lim S, Naderpoor N, Mousa A. Vitamin D-Binding Protein in Pregnancy and Reproductive Health. Nutrients 2020; 12:nu12051489. [PMID: 32443760 PMCID: PMC7285222 DOI: 10.3390/nu12051489] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 04/23/2020] [Accepted: 05/18/2020] [Indexed: 02/06/2023] Open
Abstract
Vitamin D-binding protein (VDBP), the main carrier of vitamin D, has recently been implicated in reproductive health and pregnancy outcomes including endometriosis, polycystic ovary syndrome (PCOS), pre-eclampsia, and gestational diabetes mellitus (GDM). Improved methods for measuring VDBP and an increased understanding of its role in biological processes have led to a number of newly published studies exploring VDBP in the context of pregnancy. Here, we synthesize the available evidence regarding the role of VDBP in reproductive health and pregnancy, and we highlight areas requiring further study. Overall, low levels of maternal serum VDBP concentrations have been associated with infertility, endometriosis, PCOS and spontaneous miscarriage, as well as adverse pregnancy outcomes including GDM, pre-eclampsia, preterm birth and fetal growth restriction. However, increased VDBP concentration in cervicovaginal fluid has been linked to unexplained recurrent pregnancy loss and premature rupture of membranes. Some genetic variants of VDBP have also been associated with these adverse outcomes. Further studies using more accurate VDBP assays and accounting for ethnic variation and potential confounders are needed to clarify whether VDBP is associated with reproductive health and pregnancy outcomes, and the mechanisms underlying these relationships.
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Affiliation(s)
- Melinda Fernando
- Monash Centre for Health Research and Implementation (MCHRI) and Centre of Cardiovascular Research and Education in Therapeutics (CCRET), School of Public Health and Preventive Medicine, Monash University, Melbourne 3168 VIC, Australia; (M.F.); (C.M.); (S.L.); (N.N.)
| | - Stacey J. Ellery
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Obstetrics and Gynaecology, Monash University, Melbourne 3168 VIC, Australia;
| | - Clara Marquina
- Monash Centre for Health Research and Implementation (MCHRI) and Centre of Cardiovascular Research and Education in Therapeutics (CCRET), School of Public Health and Preventive Medicine, Monash University, Melbourne 3168 VIC, Australia; (M.F.); (C.M.); (S.L.); (N.N.)
| | - Siew Lim
- Monash Centre for Health Research and Implementation (MCHRI) and Centre of Cardiovascular Research and Education in Therapeutics (CCRET), School of Public Health and Preventive Medicine, Monash University, Melbourne 3168 VIC, Australia; (M.F.); (C.M.); (S.L.); (N.N.)
| | - Negar Naderpoor
- Monash Centre for Health Research and Implementation (MCHRI) and Centre of Cardiovascular Research and Education in Therapeutics (CCRET), School of Public Health and Preventive Medicine, Monash University, Melbourne 3168 VIC, Australia; (M.F.); (C.M.); (S.L.); (N.N.)
| | - Aya Mousa
- Monash Centre for Health Research and Implementation (MCHRI) and Centre of Cardiovascular Research and Education in Therapeutics (CCRET), School of Public Health and Preventive Medicine, Monash University, Melbourne 3168 VIC, Australia; (M.F.); (C.M.); (S.L.); (N.N.)
- Correspondence: ; Tel.: +61-3857-22854
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Mesinovic J, Teede HJ, Shorakae S, Lambert GW, Lambert EA, Naderpoor N, de Courten B. The Relationship between Vitamin D Metabolites and Androgens in Women with Polycystic Ovary Syndrome. Nutrients 2020; 12:E1219. [PMID: 32357490 DOI: 10.3390/nu12051219] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/16/2020] [Accepted: 04/24/2020] [Indexed: 01/15/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder among women of reproductive age, with hyperandrogenism present in up to 90% of affected women. Some evidence suggests a link between vitamin D deficiency and PCOS features via insulin resistance and inflammation. Our aim was to explore the relationship between biochemical markers of vitamin D status and androgens in women with PCOS. This cross-sectional study used bio-banked samples from 46 pre-menopausal women with PCOS (mean ± SD: age 30 ± 6 years; BMI 29 ± 6 kg/m2). We measured 25-hydroxyvitamin D (25[OH]D), vitamin D-binding protein (DBP), total testosterone, sex hormone-binding globulin (SHBG), and calculated the free androgen index (FAI) and bioavailable and free 25(OH)D. Fasting glucose and insulin were used to calculate the homeostatic model assessment of insulin resistance (HOMA-IR) and body fat percentage was determined via dual energy x-ray absorptiometry. High-sensitivity C-reactive protein (hs-CRP) was measured as a marker of inflammation. DBP was positively associated with total 25(OH)D and expectedly, negatively associated with free 25(OH)D. There were no associations between vitamin D metabolites and total testosterone, SHBG or FAI, even after adjusting for age, body fat percentage, HOMA-IR and hs-CRP. We found no associations between vitamin D metabolites and androgens in women with PCOS. Studies that have identified a vitamin D-androgen link have largely relied on methodology with numerous pitfalls; future studies should exclusively use gold-standard measures to confirm these findings in this population.
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Zhang H, Wang T, Han Z, Wang L, Zhang Y, Wang L, Liu G. Impact of Vitamin D Binding Protein Levels on Alzheimer's Disease: A Mendelian Randomization Study. J Alzheimers Dis 2020; 74:991-998. [PMID: 32116251 DOI: 10.3233/jad-191051] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Until now, observational studies, randomized controlled trials (RCTs), and Mendelian randomization (MR) studies have explored the impact of vitamin D on Alzheimer's disease (AD), and reported inconsistent findings. In MR studies, the sensitivity analysis by removing GC rs2282679 variant highlighted no association of 25OHD levels with AD risk, which indicates that vitamin D-binding protein (DBP) encoded by GC may have distinct effects on AD risk. Here, we aim to clarify this assumption. We selected the GC rs2282679 variant associated with DBP levels (p = 3.30E-76) as the instrumental variable, and extracted the summary statistics of rs2282679 variant in multiple AD GWAS datasets from IGAP, Complex Trait Genetics (CTG) lab, and UK Biobank. We then performed a MR study to investigate the causal association between DBP levels and AD. In IGAP, MR analysis showed that the genetically DBP levels (per 1 standard deviation (SD) increase 50 mg/L) were significantly associated with reduced AD risk (OR = 0.63, 95% CI: 0.45-0.89, p = 0.009). Importantly, the estimates from two sensitivity analyses were consistent with the main estimate in terms of direction and magnitude. Meanwhile, we found no causal association between DBP levels and other four AD phenotypes in CTG lab and UK Biobank. In summary, we highlight the role of DBP levels in AD risk, and provide strong support evidence that DBP may be the therapeutic agent for the treatment of AD. Meanwhile, our findings clarify the assumption that DBP may drive the observed relationship between 25OHD levels and AD.
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Affiliation(s)
- Haihua Zhang
- National Engineering Laboratory of Internet Medical Diagnosis and Treatment Technology, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Tao Wang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
- Chinese Institute for Brain Research, Beijing, China
| | - Zhifa Han
- School of Medicine, School of Pharmaceutical Sciences, THU-PKU Center for Life Sciences, Tsinghua University, Beijing, China
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing, China
- Department of Pathophysiology, Peking Union Medical College, Beijing, China
| | - Longcai Wang
- Department of Anesthesiology, The Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Yan Zhang
- Department of Pathology, The Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Lijun Wang
- Department of Encephalopathy, Shenzhen Hospital of Guangzhou University of Chinese Medicine (Futian), Shenzhen, China
| | - Guiyou Liu
- National Engineering Laboratory of Internet Medical Diagnosis and Treatment Technology, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
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Zhang Y, Li S, Zhuo F, Wang H, Geng X, Xu B, Yin L, Sun H, Yan X. Additive Effects of VDBP and 1,25(OH)2D3 on the Viability and Apoptosis of Rheumatoid Arthritis Synovial Fibroblasts. Front Endocrinol (Lausanne) 2020; 11:583229. [PMID: 33584536 PMCID: PMC7876401 DOI: 10.3389/fendo.2020.583229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/09/2020] [Indexed: 11/13/2022] Open
Abstract
AIM This study is to investigate the additive effect of Vitamin D-binding protein (VDBP) and 1,25(OH)2D3 on the viability and apoptosis of synovial cells from patients with rheumatoid arthritis (RA). METHODS Synovial tissues and synovial fluid of patients with RA and osteoarthritis (OA) were collected. The expression of VDBP was analyzed with immunohistochemistry and ELISA. CCK-8 assay was applied to detect cell viability. Flow cytometry was used to analyze cell cycle and apoptosis. RESULTS Immunohistochemical results showed that the expression of VDBP in the synovium of RA patients was significantly lower than that of OA (P<0.05). Similarly, ELISA results presented a lower expression of VDBP in the synovial fluid of RA patients. The results of CCK-8 assay showed that both 1,25(OH)2D3 and VDBP significantly inhibited the viability of rheumatoid arthritis synovial fibroblasts (RASF) (P<0.05). The treatment with 1,25(OH)2D3+VDBP led to more significantly inhibited viability of RASF, compared with 1,25(OH)2D3 alone (P<0.05). The results of flow cytometry showed that 1,25(OH)2D3 and VDBP both promoted the apoptosis of RASF (P<0.05) and 1,25(OH)2D3+VDBP led to a higher proportion of RASF apoptosis, compared with 1,25(OH)2D3 alone (P<0.05). However, 1,25(OH)2D3 and VDBP had no significant effect on the cell cycle of RASF. Additionally, 1,25(OH)2D3 promoted the expression of VDBP in RASF, but not concentration-dependently. CONCLUSION VDBP is reduced in the synovial tissue and synovial fluid of RA patients and can inhibit viability of RASF and promote the apoptosis of RASF. The 1,25(OH)2D3 can upregulate the expression of VDBP in RASF. Additionally, VDBP can enhance the effects of 1,25(OH)2D3 on viability and apoptosis of RASF.
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Affiliation(s)
- Yeyong Zhang
- Department of Orthopedic Surgery, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory for Rheumatic Disease and Translational Medicine, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Shufeng Li
- Department of Orthopedic Surgery, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory for Rheumatic Disease and Translational Medicine, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Feng Zhuo
- Department of Orthopedic Surgery, Tai’an Central Hospital, Tai’an, China
| | - Hongxing Wang
- Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiubin Geng
- Department of Orthopedic Surgery, Jinan Municipal Third Hospital, Jinan, China
| | - Bing Xu
- Department of Orthopedic Surgery, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Luxu Yin
- Department of Orthopedic Surgery, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Huaqiang Sun
- Department of Orthopedic Surgery, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xinfeng Yan
- Department of Orthopedic Surgery, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory for Rheumatic Disease and Translational Medicine, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- *Correspondence: Xinfeng Yan,
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Nasiri‐Kalmarzi R, Abdi M, Hosseini J, Tavana S, Mokarizadeh A, Rahbari R. Association of vitamin D genetic pathway with asthma susceptibility in the Kurdish population. J Clin Lab Anal 2020; 34:e23039. [PMID: 31541492 PMCID: PMC6977155 DOI: 10.1002/jcla.23039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 08/28/2019] [Accepted: 08/30/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Vitamin D (Vit D) function in asthma progression has been studied well. The effects of genetic variations in Vit D pathway molecules have been also studied, although the results are contradicted. In the present study, for the first time we examined the Vit D pathway molecules included serum Vit D and vitamin D-binding protein (VDBP) and also genetic variations in the vitamin D receptor (VDR) and VDBP in a Kurdish population with asthma. METHODS An enzyme-linked immunosorbent assay (ELISA) method was used to measure the serum Vit D and VDBP. VDR rs1544410 and rs2228570 and VDBP rs7041 were assessed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). RESULTS The serum level of Vit D significantly decreased in asthmatic patients versus controls (16.26 ± 6.76 vs 23.05 ± 10.57 ng/mL, P value = .001). We observed an indirect correlation between Vit D and clinical findings. We also found an increased level of serum VDBP in patients as compared to the controls (1044.6 ± 310.82 vs 545.95 ± 121.73 µg/mL, P value < .0001). Besides, the risk of asthma progression was increased in patients with the VDR rs2228570 CC and VDBP rs7041 GG genotypes (OR = 3.56, P = .0382 and OR = 2.58, P = .01, respectively). CONCLUSION In summary, our results explain the influence of the genetic variations in VDR and VDBP in addition to Vit D and VDBP serum concentrations on asthma susceptibility in the Kurdish population.
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Affiliation(s)
- Rasoul Nasiri‐Kalmarzi
- Lung Diseases and Allergy Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
- Department of PediatricsFaculty of MedicineKurdistan University of Medical SciencesSanandajIran
| | - Mohammad Abdi
- Cellular and Molecular Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
- Department of Clinical BiochemistryFaculty of MedicineKurdistan University of Medical SciencesSanandajIran
| | - Javad Hosseini
- Cellular and Molecular Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
| | - Somayeh Tavana
- Cellular and Molecular Research CenterResearch Institute for Health DevelopmentKurdistan University of Medical SciencesSanandajIran
| | - Aram Mokarizadeh
- Department of Research and DevelopmentAsia Jivan Teb Science‐based CompanySanandajIran
| | - Rezgar Rahbari
- Department of Clinical BiochemistryFaculty of MedicineKurdistan University of Medical SciencesSanandajIran
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Liang Y, Jiang L, Chi X, Hochwald S, Qiu F, Luo Y, Lu Q, Yang X, Huang H, Xu J. The association of serum vitamin D-binding protein and 25-hydroxyvitamin D in pre-operative and post-operative colorectal cancer. J Clin Lab Anal 2019; 34:e23154. [PMID: 31837045 PMCID: PMC7246372 DOI: 10.1002/jcla.23154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/15/2019] [Accepted: 11/21/2019] [Indexed: 12/12/2022] Open
Abstract
Background The association between vitamin D–binding protein (VDBP) and 25‐hydroxyvitamin D (25 (OH)D) with colorectal cancer (CRC) is still ambiguous. This study was to further investigate the relationship between serum VDBP, 25 (OH)D levels and the clinical and pathological features of patients with CRC. Methods Enzyme‐linked immunosorbent assay (ELISA) and chemiluminescence immunoassay were used to analyze the VDBP and 25(OH)D concentrations in serum. Pearson's correlation analysis was applied to evaluate the association between serum VDBP and 25(OH)D levels in CRC. Conditional logistic regression was performed to analyze the prediction value of serum VDBP or 25(OH)D as a risk factor for CRC. Results The serological levels of 25(OH)D in patients were significantly lower than in healthy individuals, while VDBP levels were significantly higher than in healthy controls. The serum VDBP in pre‐operative was significantly lower than in post‐operative samples, while the serum 25(OH)D from pre‐operative patients was significantly higher than post‐operative patients. Patients with tumors with higher stage and increased lymph node involvement had lower serum post‐operative VDBP levels. In addition, our results showed that the pre‐operative VDBP level is a risk factor of CRC. Conclusions The levels of serum 25(OH)D and VDBP were both associated with CRC. Thus, serum 25(OH)D and VDBP levels might be of value in evaluating the pathogenesis and risk of CRC in the future. Moreover, serum VDBP or 25(OH)D levels were associated with patient's clinical and pathological features providing data for risk and prognostic prediction.
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Affiliation(s)
- Yuanzi Liang
- Department of Laboratory Medicine, Nanhai Hospital, Southern Medical University, Foshan, Guangdong, China
| | - Liejun Jiang
- Department of Laboratory Medicine, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Xiaowei Chi
- Department of Laboratory Medicine, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shangdong, China
| | - Steven Hochwald
- Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, NY, USA
| | - Feng Qiu
- Department of Laboratory Medicine, Nanhai Hospital, Southern Medical University, Foshan, Guangdong, China
| | - Yanfang Luo
- Department of Laboratory Medicine, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Qiuwei Lu
- Department of Laboratory Medicine, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Xiafang Yang
- Department of Laboratory Medicine, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Huayi Huang
- Department of Laboratory Medicine, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China.,Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, NY, USA
| | - Junfa Xu
- Department of Clinical Immunology, Institute of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, Guangdong, China
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Peršić V, Raljević D, Markova-Car E, Cindrić L, Miškulin R, Žuvić M, Kraljević Pavelić S. Vitamin D-binding protein (rs4588) T/T genotype is associated with anteroseptal myocardial infarction in coronary artery disease patients. Ann Transl Med 2019; 7:374. [PMID: 31555688 DOI: 10.21037/atm.2019.07.49] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background Cardiovascular diseases (CVD) are among leading causes of death worldwide and amongst CVD, coronary artery disease (CAD) accounts for almost half of all cardiovascular deaths as the most common cause of death in the developed world. Vitamin D and the vitamin D-binding protein (VDBP) have been studied as possible CAD pathogenesis factors but literature data provide opposing evidence on their role in CAD. Herein we aimed to present novel evidence on the association of two VDBP polymorphisms (rs4588) and (rs7041) with CAD in patients after acute myocardial infarction and study possible correlations of these polymorphisms with 25-hydroxyvitamin D [25(OH)D] serum levels. Methods The cross-section genotyping study included 155 subjects with CAD upon acute myocardial infarct and 104 control subjects. All patients and control group were Caucasians of European descent. VDBP polymorphisms (rs4588) and (rs7041) were studied by use of RT-PCR. Liquid chromatography, tandem mass spectrometry (LC-MS/MS) method was used for measurement of vitamin D in the serum. Results Association of the VDBP (rs4588) T/T genotype with CAD patients after acute MI and correlation of VDBP (rs4588) genotype G/G with higher levels of total vitamin D were found. No correlation of 25(OH)D serum levels with CAD were established but the multivariate logistic regression modelling enabled association of total vitamin D level and VDBP (rs4588) T/T genotype with CAD and anteroseptal myocardial infarction (ASMI) CAD occurrence. Conclusions Obtained data speak in favor to the VDBP (rs4588) T/T genotype as a susceptibility factor for anteroseptal myocardial infarction where the same genotype showed to be generally more prevalent in smokers.
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Affiliation(s)
- Viktor Peršić
- Department of Medical Rehabilitation, Medical Faculty, University of Rijeka, Rijeka, Croatia.,Division of Cardiology, Hospital for Medical Rehabilitation of the Heart and Lung Diseases and Rheumatism "Thalassotherapia-Opatija", Opatija, Croatia
| | - Damir Raljević
- Department of Medical Rehabilitation, Medical Faculty, University of Rijeka, Rijeka, Croatia.,Division of Cardiology, Hospital for Medical Rehabilitation of the Heart and Lung Diseases and Rheumatism "Thalassotherapia-Opatija", Opatija, Croatia
| | - Elitza Markova-Car
- Department of Biotechnology, Centre for High-throughput Technologies, University of Rijeka, Rijeka, Croatia
| | - Leon Cindrić
- Department of Biotechnology, Centre for High-throughput Technologies, University of Rijeka, Rijeka, Croatia
| | - Rajko Miškulin
- Department of Medical Rehabilitation, Medical Faculty, University of Rijeka, Rijeka, Croatia.,Division of Cardiology, Hospital for Medical Rehabilitation of the Heart and Lung Diseases and Rheumatism "Thalassotherapia-Opatija", Opatija, Croatia
| | - Marta Žuvić
- Department of Biotechnology, Centre for High-throughput Technologies, University of Rijeka, Rijeka, Croatia
| | - Sandra Kraljević Pavelić
- Department of Biotechnology, Centre for High-throughput Technologies, University of Rijeka, Rijeka, Croatia
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Khanna R, Nandy D, Senapati S. Systematic Review and Meta-Analysis to Establish the Association of Common Genetic Variations in Vitamin D Binding Protein With Chronic Obstructive Pulmonary Disease. Front Genet 2019; 10:413. [PMID: 31156695 PMCID: PMC6532414 DOI: 10.3389/fgene.2019.00413] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 04/16/2019] [Indexed: 12/18/2022] Open
Abstract
Background: Vitamin-D binding protein (DBP) also known as GC protein, is a major determinant for vitamin- D metabolism and transport. GC1F, GC1S, and GC2 are the three allelic variants (denoted as rs4588 and rs7041) of GC, and known to be associated with chronic obstructive pulmonary disease (COPD). However, contradictory reports and population specific risk attributed by these alleles warranted detailed genetic epidemiology study to establish the association between GC variants and COPD. In this study we performed a meta-analysis and investigated the genetic architecture of GC locus to establish the association and uncover the plausible reason for allelic heterogeneity. Methods: Published cross-sectional case control studies were screened and meta-analysis was performed between GC variants and COPD outcome. RevMan-v5.3 software was used to perform random and/or fixed models to calculate pooled odds ratio (Meta-OR). Linkage disequilibrium (LD) and haplotypes at GC locus were evaluated using 1000 Genomes genotype data. In silico functional implications of rs4588 and rs7041 was tested using publicly available tools. Results: GC1F allele and GC1F/1F genotype were found to confer COPD risk in overall meta-analysis. GC1S/1S was found to confer risk only among Europeans. In silico investigation of rs4588 and rs7041 identified strong eQTL effects and potential role in regulation of GC expression. Large differences in allele frequencies, linkage disequilibrium (LD) and haplotypes were identified at GC locus across different populations (Japanese, African, Europeans, and Indians), which may explain the variable association of different GC alleles in different populations. Conclusion: GC1F and GC1F/1F impose significant genetic risk for COPD, among Asians. Considerable differences in allele frequencies and LD structure in GC locus may impose population specific risk.
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Affiliation(s)
- Ritesh Khanna
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Bathinda, India
| | - Debparna Nandy
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Bathinda, India
| | - Sabyasachi Senapati
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Bathinda, India
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Peng J, Zhan YL, Liu YJ, Zong Y, Xu JG. Plasma VDBP, 25(OH)D, and GSH levels predict surgical outcome in patients with cervical spondylotic myelopathy. Kaohsiung J Med Sci 2019; 35:102-110. [PMID: 30848027 DOI: 10.1002/kjm2.12015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 11/22/2018] [Indexed: 11/07/2022] Open
Abstract
This study intends to investigate the predictive values of plasma Vitamin D-binding protein (VDBP), 25-hydroxyvitamin D [25(OH)D], and glutathione (GSH) levels in the outcome of cervical spondylotic myelopathy (CSM) surgery. Surgery outcomes of 236 CSM patients were determined. Recovery rate was calculated according to Japanese Orthopaedic Association (JOA) scores during follow-up. CSM patients with a recovery rate >50% were assigned with good prognosis and the rest were with fair prognosis. Preoperative and postoperative neurologic function scores were compared among groups. Plasma VDBP and 25(OH)D levels, as well as GSH levels were measured by ELISA and glutathione reductase recycling assay, respectively. Pearson's correlation coefficient was performed to analyze the correlation among plasma VDBP, 25(OH)D, and GSH levels. Receiver operating characteristic (ROC) curve was applied to evaluate the predictive value of plasma VDBP, 25(OH)D, and GSH levels for surgical outcome. Logistic regression model was used to analyze risk factors for surgical outcome. Compared with those with fair prognosis, CSM patients with good prognosis group exhibited higher postoperative neurologic function scores, plasma VDBP, 25(OH)D, and GSH levels, and better improvements in spinal cord compression and motions of the cervical vertebra. Plasma VDBP, 25(OH)D, and GSH levels were favorable prognostic factors for CSM surgical outcome. The sensitivity and specificity of plasma VDBP, plasma 25(OH)D, and plasma GSH were 89.8% and 91.7%, 85.8% and 84.4%, and 79.5% and 91.7%, respectively. Our study provides evidence that higher plasma VDBP, 25(OH)D, and GSH levels may predict better surgical outcome in CSM patients.
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Affiliation(s)
- Jun Peng
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yu-Lin Zhan
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Ying-Jie Liu
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yang Zong
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jian-Guang Xu
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Rivera-Paredez B, Macías N, Martínez-Aguilar MM, Hidalgo-Bravo A, Flores M, Quezada-Sánchez AD, Denova-Gutiérrez E, Cid M, Martínez-Hernández A, Orozco L, Quiterio M, Flores YN, Salmerón J, Velázquez-Cruz R. Association between Vitamin D Deficiency and Single Nucleotide Polymorphisms in the Vitamin D Receptor and GC Genes and Analysis of Their Distribution in Mexican Postmenopausal Women. Nutrients 2018; 10:E1175. [PMID: 30150596 PMCID: PMC6164456 DOI: 10.3390/nu10091175] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/18/2018] [Accepted: 08/23/2018] [Indexed: 12/12/2022] Open
Abstract
Genome-wide association studies in people with European ancestry suggest that polymorphisms in genes involved in vitamin D (VD) metabolism have an effect on serum concentrations of 25-hydroxyvitamin D. However, nothing is known about these polymorphisms in populations with Amerindian ancestry. Our aim was to evaluate the association between genetic variants on the vitamin D receptor (VDR) and the vitamin D binding protein (GC) genes, involved in the VD pathway, and VD deficiency in 689 unrelated Mexican postmenopausal women. We also described the frequencies of these variants in 355 postmenopausal women from different ethnic groups. Based on our preliminary results of 400 unrelated Mexican postmenopausal women, three single nucleotide polymorphisms (SNPs) were selected for genotyping. The SNPs rs4516035 in VDR and rs2282679 in GC were associated with VD deficiency. Additionally, women who carried three risk alleles had a 3.67 times higher risk of suffering VD deficiency, compared to women with no risk alleles (p = 0.002). The rs4516035-C allele frequency in the Amerindian population was enriched in the South East region of Mexico. In contrast, the highest frequency of the rs2298850-C allele, a proxy for the tag SNP rs2282679, was observed in the South region. Our results indicate that genetic variants in VDR and GC genes are associated with VD deficiency in Mexican postmenopausal women. Moreover, an association was observed for the variants rs3794060 and rs4944957 of the DHCR7/NADSYN1 gene with osteopenia/osteoporosis.
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Affiliation(s)
- Berenice Rivera-Paredez
- Academic Unit in Epidemiological Research, Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico, Mexico City 04510, Mexico.
| | - Nayeli Macías
- Nutrition and Health Research Center, National Institute of Public Health (INSP), Cuernavaca, Morelos 62100, Mexico.
| | - Mayeli M Martínez-Aguilar
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico.
| | - Alberto Hidalgo-Bravo
- Department of Genetics, National Institute of Rehabilitation (INR), Mexico City 14389, Mexico.
| | - Mario Flores
- Nutrition and Health Research Center, National Institute of Public Health (INSP), Cuernavaca, Morelos 62100, Mexico.
| | - Amado D Quezada-Sánchez
- Center for Evaluation and Surveys Research, National Institute of Public Health (INSP), Cuernavaca, Morelos 62100, Mexico.
| | - Edgar Denova-Gutiérrez
- Nutrition and Health Research Center, National Institute of Public Health (INSP), Cuernavaca, Morelos 62100, Mexico.
| | - Miguel Cid
- Inmunogenomics and Metabolic Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico.
| | - Angelica Martínez-Hernández
- Inmunogenomics and Metabolic Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico.
| | - Lorena Orozco
- Inmunogenomics and Metabolic Diseases Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico.
| | - Manuel Quiterio
- Center for Population Health Research, National Institute of Public Health (INSP), Cuernavaca, Morelos 62100, Mexico.
| | - Yvonne N Flores
- Epidemiology and Health Services Research Unit, Mexican Institute of Social Security, Cuernavaca, Morelos 62000, Mexico.
- UCLA Department of Health Policy and Management, UCLA Kaiser Permanente Center for Health Equity, Fielding School of Public Health and Jonsson Comprehensive Cancer Center, Los Angeles, CA 90001, USA.
| | - Jorge Salmerón
- Academic Unit in Epidemiological Research, Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico, Mexico City 04510, Mexico.
- Center for Population Health Research, National Institute of Public Health (INSP), Cuernavaca, Morelos 62100, Mexico.
| | - Rafael Velázquez-Cruz
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico.
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Abstract
The vitamin D-binding protein (DBP) occupies a key node in the regulation of the vitamin D system. Being the main plasma carrier of vitamin D metabolites, it regulates their stability and bioavailability. However, DBP is also a multifunctional protein with roles in the organism's actin scavenging system and immunomodulation. All these activities may affect multiple sclerosis (MS) pathophysiology. DBP can be measured in blood and cerebrospinal fluid, body fluids that have been investigated as sources of accessible biomarkers of MS. Yet, available data on DBP expression and function in MS are scattered and somewhat controversial. Aims of this review are to summarize current evidence from studies on DBP in MS patients, to discuss possible shortcomings and to highlight key points that need to be addressed to gain deeper insight into the role of DBP in MS.
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Palframan KM, Robinson SL, Mora-Plazas M, Marin C, Villamor E. Vitamin D-binding protein is inversely associated with the incidence of gastrointestinal and ear infections in school-age children. Epidemiol Infect 2018; 146:1996-2002. [PMID: 30056817 DOI: 10.1017/S0950268818002066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Circulating 25-hydroxy vitamin D (25(OH)D) is related to decreased rates of gastrointestinal and ear infections in school-age children. Vitamin D-binding protein (DBP) transports 25(OH)D and exerts immunological functions; however, it is unknown whether DBP is associated with infectious morbidity in children. We quantified plasma DBP concentrations in 540 school-age children at the time of recruitment into a cohort study in Bogotá, Colombia and obtained daily information on infectious morbidity symptoms and doctor visits during the school year. We compared the incidence rates of gastrointestinal and respiratory symptoms across quartiles of DBP concentration by estimating adjusted incidence rate ratios (IRRs) with 95% confidence interval (CI). We also estimated the per cent of the associations between DBP and morbidity that were mediated through 25(OH)D using a counterfactual frame. Mean ± s.d. DBP concentration was 2650 ± 1145 nmol/l. DBP was inversely associated with the rates of diarrhoea with vomiting (IRR for quartiles 2-4 vs. 1 = 0.48; 95% CI 0.25-0.92; P = 0.03) and earache/ear discharge with fever (IRR for quartiles 2-4 vs. 1 = 0.29; 95% CI 0.12-0.71; P = 0.006). The DBP-morbidity associations were not mediated through 25(OH)D. We conclude that plasma DBP predicts lower incidence of gastrointestinal and ear infections in school-age children independent of 25(OH)D.
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Go DJ, Lee JY, Kang MJ, Lee EY, Lee EB, Yi EC, Song YW. Urinary vitamin D-binding protein, a novel biomarker for lupus nephritis, predicts the development of proteinuric flare. Lupus 2018; 27:1600-1615. [PMID: 29958502 DOI: 10.1177/0961203318778774] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Lupus nephritis (LN) is a major complication of systemic lupus erythematosus (SLE). Conventional biomarkers for assessing renal disease activity are imperfect in predicting clinical outcomes associated with LN. The aim of this study is to identify urinary protein biomarkers that reliably reflect the disease activity or predict clinical outcomes. A quantitative proteomic analysis was performed to identify protein biomarker candidates that can differentiate between SLE patients with and without LN. Selected biomarker candidates were further verified by enzyme-linked immunosorbent assay using urine samples from a larger cohort of SLE patients ( n = 121) to investigate their predictive values for LN activity measure. Furthermore, the association between urinary levels of a selected panel of potential biomarkers and prognosis of LN was assessed with a four-year follow-up study of renal outcomes. Urinary vitamin D-binding protein (VDBP), transthyretin (TTR), retinol binding protein 4 (RBP4), and prostaglandin D synthase (PTGDS) were significantly elevated in SLE patients with LN, especially in patients with active LN ( n = 21). Among them, VDBP well correlated with severity of proteinuria (rho = 0.661, p < 0.001) and renal SLE Disease Activity Index (renal SLEDAI) (rho = 0.520, p < 0.001). In the four-year follow-up, VDBP was a significant risk factor (hazard ratio 9.627, 95% confidence interval 1.698 to 54.571, p = 0.011) for the development of proteinuric flare in SLE patients without proteinuria ( n = 100) after adjustments for multiple confounders. Urinary VDBP correlated with proteinuria and renal SLEDAI, and predicted the development of proteinuria.
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Affiliation(s)
- D J Go
- 1 Division of Rheumatology, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.,2 Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine, Medical Research Institute, Seoul National University, Seoul, Korea
| | - J Y Lee
- 2 Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine, Medical Research Institute, Seoul National University, Seoul, Korea
| | - M J Kang
- 2 Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine, Medical Research Institute, Seoul National University, Seoul, Korea
| | - E Y Lee
- 3 Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - E B Lee
- 3 Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - E C Yi
- 2 Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine, Medical Research Institute, Seoul National University, Seoul, Korea
| | - Y W Song
- 2 Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine, Medical Research Institute, Seoul National University, Seoul, Korea.,3 Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
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Karuwanarint P, Phonrat B, Tungtrongchitr A, Suriyaprom K, Chuengsamarn S, Schweigert FJ, Tungtrongchitr R. Vitamin D-binding protein and its polymorphisms as a predictor for metabolic syndrome. Biomark Med 2018; 12:465-473. [PMID: 29504805 DOI: 10.2217/bmm-2018-0029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
AIM To investigate the relationship of vitamin D-binding protein (GC) and genetic variation of GC (rs4588, rs7041 and rs2282679) with metabolic syndrome (MetS) in the Thai population. MATERIALS & METHODS GC-globulin concentrations were measured by quantitative western blot analysis in 401 adults. All participants were genotyped using TaqMan allelic discrimination assays. RESULTS GC-globulin levels were significatly lower in MetS subjects than in control subjects, in which significant negative correlations of GC-globulin levels with systolic blood pressure, glucose and age were found. Male participants who carried the GT genotype for rs4588 showed an increased risk of MetS compared with the GG wild-type (odds ratio: 3.25; p = 0.004). CONCLUSION GC-globulin concentrations and variation in GC rs4588 were supported as a risk factor for MetS in Thais.
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Affiliation(s)
- Piyaporn Karuwanarint
- Department of Tropical Nutrition & Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Benjaluck Phonrat
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Anchalee Tungtrongchitr
- Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kanjana Suriyaprom
- Faculty of Medical Technology, Rangsit University, Pathumthani, Thailand
| | - Somlak Chuengsamarn
- Division of Endocrinology & Metabolism, Faculty of Medicine, HRH Princess Maha Chakri Sirindhorn Medical Center Srinakharinwirot University, Nakornnayok, Thailand
| | - Florian J Schweigert
- Institute of Nutrition Science, Department of Physiology & Pathophysiology of Nutrition, University of Potsdam, Germany
| | - Rungsunn Tungtrongchitr
- Department of Tropical Nutrition & Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Karras SN, Koufakis T, Fakhoury H, Kotsa K. Deconvoluting the Biological Roles of Vitamin D-Binding Protein During Pregnancy: A Both Clinical and Theoretical Challenge. Front Endocrinol (Lausanne) 2018; 9:259. [PMID: 29875736 PMCID: PMC5974103 DOI: 10.3389/fendo.2018.00259] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 05/07/2018] [Indexed: 12/04/2022] Open
Abstract
The teleological purpose of an ongoing pregnancy is to fulfill its fundamental role of a successful, uncomplicated delivery, in conjunction with an optimal intrauterine environment for the developing fetus. Vitamin D metabolism is adapted to meet both these demands during pregnancy; first by stimulation of calcium absorption for adequate intrauterine bone mineral accrual of the fetus, and second, by enhancing systemic and local maternal tolerance to paternal and fetal alloantigens. Vitamin D-binding protein (VDBP) is one of the key biomolecules that optimize vitamin D homeostasis and also contributes as an immune regulator for a healthy, ongoing pregnancy. In this regard, recent results indicate that dysregulation of VDBP equilibrium could be a risk factor for adverse fetal, maternal, and neonatal outcomes, including preeclampsia, preterm birth, and gestational diabetes. Moreover, it has been hypothesized to be also implicated in the interpretation of vitamin D status in the pregnant state. The aim of this review is to assess available literature regarding the association of VDBP with clinical outcomes during pregnancy, as a potential biomarker for future clinical practice, with a discourse on current knowledge gaps and future research agenda.
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Affiliation(s)
- Spyridon N. Karras
- Division of Endocrinology and Metabolism, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
- *Correspondence: Spyridon N. Karras,
| | - Theocharis Koufakis
- Division of Endocrinology and Metabolism, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
| | - Hana Fakhoury
- Department of Biochemistry and Molecular Biology, College of Medicine, AlFaisal University, Riyadh, Saudi Arabia
| | - Kalliopi Kotsa
- Division of Endocrinology and Metabolism, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
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Tarighi S, Najafi M, Hossein-Nezhad A, Ghaedi H, Meshkani R, Moradi N, Fadaei R, Kazerouni F, Shanaki M. Association Between Two Common Polymorphisms of Vitamin D Binding Protein and the Risk of Coronary Artery Disease: A Case-control Study. J Med Biochem 2017; 36:349-357. [PMID: 30581332 PMCID: PMC6294082 DOI: 10.1515/jomb-2017-0015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 03/07/2017] [Indexed: 12/15/2022] Open
Abstract
Background Coronary Artery Disease (CAD) is one of the most widespread non-communicable diseases. Vitamin Dbinding protein (VDBP) and its genetic poly morphisms have been highlighted as the susceptible components for CAD. The aim of the present study was to examine the association of VDBP single nucleotide poly morphisms (SNPs) - rs7041 and rs4588 - with CAD susceptibility among the Iranian population. Methods A total of 143 men with CAD and 145 healthy age-sex matched controls underwent genotyping for the - rs7041 and rs4588 polymorphisms using the polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) method. Serum level of 25(OH)D was assayed using microplate colorimetric enzyme immunoassay. Results We found a significant association between GG genotype (rs7041) and CAD (p=0.02, OR=0.537 95% CI =0.306-0.944). Regarding rs4588 polymorphism, a significant difference was observed in which the CA genotype (p=0.00032, OR=2.578, 95% CI=1.579-4.208) and allele A (P=0.028, OR=1.491, 95% CI=1.043-2.132) were significantly higher in CAD patients compared to controls. In spite of lower serum levels of 25(OH)D in CAD patients, we found no significant association between these SNPs and Vitamin D serum concentrations. Conclusion We concluded that VDBP polymorphisms affect the susceptibility to CAD in Iranian men. Therefore, further studies are required to clarify the association of VDBP phenotypes and its serum levels with CAD.
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Affiliation(s)
- Shahriar Tarighi
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdi Najafi
- Department of Research, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran, Cardiac Outcome Research and Education (CORE), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Arash Hossein-Nezhad
- Osteoporosis Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Ghaedi
- Department of Medical Genetics, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Meshkani
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nariman Moradi
- Department of Clinical Biochemistry, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Fadaei
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Faranak Kazerouni
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehrnoosh Shanaki
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- E-mail:
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Li W, Zhu W, Hou J, Meng H. Vitamin D-binding protein expression in healthy tooth and periodontium: an experimental study both in monkeys in vivo and in humans in vitro. J Periodontal Res 2017; 52:755-760. [PMID: 28256004 DOI: 10.1111/jre.12445] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND OBJECTIVE Vitamin D-binding protein (DBP) is a highly expressed plasma protein with many important functions, including transport of vitamin D metabolites, sequestration of actin, control of bone metabolism and modulation of immune and inflammatory responses. Previous results of our study indicated an association between DBP and periodontitis. We hypothesized that periodontium might be another source of DBP in gingival crevicular fluid other than serum. MATERIAL AND METHODS DBP expression was examined in dental and periodontal tissues of monkeys by immunohistochemistry, and in primary cells isolated from human dental and periodontal tissues by reverse transcription plus the polymerase chain reaction and immunocytochemistry. RESULTS DBP was constitutively expressed and widely distributed in dental and periodontal tissues of primates. Their immunoreaction was evident in gingival epithelium, particularly in junctional epithelium, and in mineralizing areas of the dental pulp, periodontal ligament and bone marrow. Correspondingly, mRNA and protein expression were detected in primary human gingival epithelial cells, dental pulp cells and periodontal ligament cells. CONCLUSION DBP is highly expressed and widely distributed in dental and periodontal tissues, which may take an active part in local host defense and hard tissue metabolism.
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Affiliation(s)
- W Li
- Department of Periodontology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China.,Department of Periodontology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, China.,Key Laboratory of Oral Clinical Medicine, College of Stomatology, Qingdao University, Shinan District, Qingdao, Shandong Province, China
| | - W Zhu
- Department of Periodontology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - J Hou
- Department of Periodontology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - H Meng
- Department of Periodontology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
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Oleröd G, Hultén LM, Hammarsten O, Klingberg E. The variation in free 25-hydroxy vitamin D and vitamin D-binding protein with season and vitamin D status. Endocr Connect 2017; 6:111-120. [PMID: 28179376 PMCID: PMC5428908 DOI: 10.1530/ec-16-0078] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 02/08/2017] [Indexed: 12/20/2022]
Abstract
PURPOSE Serum 25-hydroxy vitamin D [25(OH)D] varies greatly with season at northern latitudes. The purpose of this study was to determine if the seasonal variations in serum total 25(OH)D are followed by a concomitant variation in free 25(OH)D or if the variation is damped by alterations in the binding capacity of DBP. METHODS Serum was collected from 540 healthy blood donors (60% men; mean age 41 ± 13 years) during 12 months and analyzed for total 25(OH)D, directly measured free 25(OH)D, vitamin D-binding protein (DBP) and albumin. Calculated free 25(OH)D was estimated. RESULTS The UV-B radiation during the sampling month was positively correlated with the serum levels of total 25(OH)D (r = 0.355, P < 0.001), directly measured free (r = 0.336, P < 0.001) and calculated free 25(OH)D (r = 0.275, P < 0.001), but not with DBP and albumin. The percentage of free 25(OH)D was higher during the winter months than that during the summer months (0.020 ± 0.005% vs 0.019 ± 0.004%; P = 0.007) and higher in participants with a serum 25(OH)D below 25 nmol/L than that in participants with a serum 25(OH)D above 75 nmol/L (0.031 ± 0.007% vs 0.017 ± 0.003%; P < 0.001). iPTH was correlated with directly measured free 25(OH)D (r = -0.226; P < 0.001), but only weakly with calculated free 25(OH)D (r = -0.095; P = 0.027). CONCLUSIONS Directly measured free serum 25(OH)D was highly correlated with total serum 25(OH)D and followed the same seasonal variation, whereas the serum concentrations of DBP and albumin were stable. The fluctuation in free 25(OH)D was only marginally damped with an increase in the percentage of free 25(OH)D during the winter months and in participants with vitamin D deficiency.
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Affiliation(s)
- Göran Oleröd
- Department of Clinical Chemistry and Transfusion MedicineSahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | | | - Ola Hammarsten
- Department of Clinical Chemistry and Transfusion MedicineSahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Eva Klingberg
- Department of Rheumatology and Inflammation ResearchSahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
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Davey RX. Vitamin D-binding protein as it is understood in 2016: is it a critical key with which to help to solve the calcitriol conundrum? Ann Clin Biochem 2016; 54:199-208. [PMID: 27742848 DOI: 10.1177/0004563216677100] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Background The misnamed 'vitamin' D is actually the hormone calcitriol (1,25 dihydroxyhydroxyvitamin D). It has a central regulatory role in calcium metabolism, and more widely in the immune system. The prohormone calcifediol (25 hydroxyvitamin D) is more easily measured in the laboratory and is the analyte used in reference interval formulation. Being highly lipid soluble, both calcifediol and calcitriol travel in the bloodstream on carriage proteins, principally on vitamin D-binding protein. Summary This review reports our current understanding of vitamin D-binding protein. Its genetic determinants and their effect on it and secondarily on calcifediol concentrations and assays are described. Its complex interplay with parathyroid hormone is considered. The analytical state of the art is translated into the challenge it imposes clinically, in the formulation of reference intervals and in their use in advising and managing patients. Several recent challenges thrown up to laboratories by percipient clinicians highlight the dilemma vitamin D-binding protein poses. A way forward is suggested.
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Sørensen IM, Joner G, Jenum PA, Eskild A, Brunborg C, Torjesen PA, Stene LC. Vitamin D-binding protein and 25-hydroxyvitamin D during pregnancy in mothers whose children later developed type 1 diabetes. Diabetes Metab Res Rev 2016; 32:883-890. [PMID: 27103201 DOI: 10.1002/dmrr.2812] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/07/2016] [Accepted: 04/06/2016] [Indexed: 01/10/2023]
Abstract
BACKGROUND Levels of 25-hydroxyvitamin D (25-OH D) during late pregnancy have been linked to type 1 diabetes risk in the offspring. Vitamin D-binding protein increases in concentration during pregnancy. We aimed to test whether concentrations of vitamin D-binding protein and 25-OH D throughout pregnancy differed between women whose offspring later developed type 1 diabetes (cases) and controls. METHODS A nested case-control study was conducted within a cohort of pregnant women from all over Norway in 1992-1994. Offspring registered in The Norwegian Childhood Diabetes Registry, diagnosed with type 1 diabetes before age 15, defined the case women, giving 113 cases in the study. Two hundred twenty controls were randomly selected within the same cohort. One to four serum samples from each participant drawn at different time points during pregnancy were analysed for vitamin D-binding protein and 25-OH D by radioimmunoassay. RESULTS Vitamin D-binding protein and 25-OH D significantly increased by gestational week (p < 0.001) and tended to be lower in cases than in controls, -0.27 µmol/L (95% CI -0.57, 0.03) and -5.01 nmol/L (95% CI -8.03, -0.73), respectively. While first and second trimester concentrations of vitamin D-binding protein and 25-OH D alone were not significantly different, lower third trimester concentrations tended to be associated with higher risk of type 1 diabetes in the offspring, albeit at borderline significance after mutual adjustment. CONCLUSIONS In this first study of maternal vitamin D-binding protein measured throughout pregnancy and risk of type 1 diabetes in offspring, lower concentration, particularly in the third trimester, tended to be associated with type 1 diabetes. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
| | - Geir Joner
- Department of Paediatrics, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Pål A Jenum
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Medical Microbiology, Vestre Viken Hospital Trust, Drammen, Norway
| | - Anne Eskild
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Obstetrics and Gynaecology, Akershus University Hospital (AE), Oslo, Norway
| | - Cathrine Brunborg
- Department for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
| | | | - Lars C Stene
- Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway
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Alzaman NS, Dawson-Hughes B, Nelson J, D'Alessio D, Pittas AG. Vitamin D status of black and white Americans and changes in vitamin D metabolites after varied doses of vitamin D supplementation. Am J Clin Nutr 2016; 104:205-14. [PMID: 27194308 PMCID: PMC4919528 DOI: 10.3945/ajcn.115.129478] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/13/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Controversy exists over the disparate circulating 25-hydroxyvitamin D [25(OH)D] concentrations between black and white Americans. OBJECTIVE We sought to determine whether there are differences in total and directly measured free 25(OH)D concentrations between black and white American adults and how daily supplementation with cholecalciferol changes these concentrations. DESIGN Cross-sectional and longitudinal analyses were conducted with the use of data from 2 placebo-controlled, randomized trials at 2 academic medical centers in the United States: CaDDM (Calcium and Vitamin D in Type 2 Diabetes) and DDM2 (Vitamin D for Established Type 2 Diabetes). A total of 208 subjects with pre- or well-controlled diabetes with a mean age of 59.1 y and mean body mass index (BMI; in kg/m(2)) of 31.6 were randomly assigned to receive daily cholecalciferol supplementation at 1 of 2 doses (2000 or 4000 IU) or a matching placebo for 16 wk. We measured serum total 25(OH)D, vitamin D-binding protein (DBP) by 2 different immunoassays (with the use of monoclonal or polyclonal antibodies), parathyroid hormone, and albumin. Free 25(OH)D concentration was directly measured and calculated. RESULTS Blacks had lower total 25(OH)D concentrations than whites [adjusted median: 20.3 ng/mL (95% CI: 16.2, 24.5 ng/mL) compared with 26.7 ng/mL (95% CI: 25.2, 28.1 ng/mL), respectively; P = 0.026)], and a higher proportion of blacks had total 25(OH)D concentrations <20 ng/mL (46% compared with 19%, respectively; P < 0.001). Directly measured free 25(OH)D concentrations were lower in blacks than in whites [adjusted median: 4.5 ng/mL (95% CI: 3.7, 5.4 ng/mL) compared with 5.7 ng/mL (95% CI: 5.4, 5.9 ng/mL), respectively; P = 0.044] and were strongly correlated with total 25(OH)D without an effect of race. DBP was lower in blacks when measured by the monoclonal but not the polyclonal antibody immunoassay. Cholecalciferol supplementation increased total and measured free 25(OH)D concentrations proportionally to the dose and without a difference between races. CONCLUSIONS The relation between free and total 25(OH)D did not vary systematically by race in this multiracial population with pre- or well-controlled diabetes. The results need to be replicated in additional cohorts before concluding that the clinical assessment of vitamin D status in blacks and whites should follow a single standard. The CaDDM and DDM2 trials were registered at clinicaltrials.gov as NCT00436475 and NCT01736865, respectively.
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Affiliation(s)
- Naweed S Alzaman
- Division of Endocrinology, Diabetes and Metabolism, and College of Medicine, Department of Internal Medicine, Taibah University, Medina, Saudi Arabia
| | - Bess Dawson-Hughes
- Division of Endocrinology, Diabetes and Metabolism, and Bone Metabolism Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA; and
| | - Jason Nelson
- Predictive Analytics and Comparative Effectiveness Center, Tufts Medical Center, Boston, MA
| | - David D'Alessio
- Division of Endocrinology, Duke University Medical Center, Durham, NC
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Park Y, Kim YS, Kang YA, Shin JH, Oh YM, Seo JB, Jung JY, Lee SD. Relationship between vitamin D-binding protein polymorphisms and blood vitamin D level in Korean patients with COPD. Int J Chron Obstruct Pulmon Dis 2016; 11:731-8. [PMID: 27103796 PMCID: PMC4827885 DOI: 10.2147/copd.s96985] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background In chronic obstructive pulmonary disease (COPD), the blood vitamin D3 level is generally low, and genetic polymorphisms of vitamin D-binding protein encoded by the GC gene are associated with COPD development. In this study, we examined the relationship between GC polymorphisms and plasma vitamin D3 level in Korean patients with COPD. Methods The study included 175 COPD patients from the Korean Obstructive Lung Disease Cohort. Multivariate analysis was conducted with adjustment for age, body mass index (BMI), lung function, smoking status, smoking amount, and seasonal variation in blood vitamin D level. Vitamin D deficiency was defined as a plasma 25-hydroxyvitamin D3 level lower than 20 ng/mL. Results The mean plasma vitamin D3 level was 17.5 ng/mL. The GC1F variant (44.3%) and genotype 1F-2 (27.4%) were the most common. The plasma vitamin D3 level was lower in patients with the GC2 variant (estimated =−3.73 ng/mL) and higher in those with genotype 1F-1S (estimated =4.08 ng/mL). The GC2 variant was a significant risk factor for vitamin D deficiency (odds ratio =2.41). Among COPD clinical parameters, vitamin D deficiency was associated with a lower ratio of forced expiratory volume in 1 second to forced vital capacity (FEV1/FVC) regardless of GC polymorphisms. FEV1/FVC was higher in patients with genotype 1F-1F (estimated =3.61%) and lower in those with genotype 1F-2 (estimated =−3.31%). The 6-minute walking distance was shorter for patients with the GC1F variant (estimated =−38.91 m) and longer for those with the GC2 variant (estimated =26.98 m). The emphysema index was higher for patients with the GC1S variant (estimated =6.56%) and genotype 1F-1S (estimated =9.86%), regardless of the vitamin D level. Conclusion The GC2 variant is a risk factor for vitamin D deficiency, and genotype 1F-1S is a protective factor against vitamin D deficiency. GC polymorphisms and vitamin D deficiency correlate with clinical outcomes for Korean patients with COPD.
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Affiliation(s)
- Youngmok Park
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Young Sam Kim
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Young Ae Kang
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ju Hye Shin
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yeon Mok Oh
- Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Joon Beom Seo
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Ji Ye Jung
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sang Do Lee
- Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Mostowska A, Sajdak S, Pawlik P, Lianeri M, Jagodzinski PP. Polymorphic variants in the vitamin D pathway genes and the risk of ovarian cancer among non-carriers of BRCA1/BRCA2 mutations. Oncol Lett 2015; 11:1181-1188. [PMID: 26893716 DOI: 10.3892/ol.2015.4033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 10/26/2015] [Indexed: 12/26/2022] Open
Abstract
Previous studies have produced inconsistent results regarding the contribution of single-nucleotide polymorphisms (SNPs) in the vitamin D receptor (VDR) gene to ovarian cancer (OC) in various ethnicities. Additionally, little has been established with regard to the role of SNPs located in the retinoid X receptor α (RXRA), vitamin D-binding protein [also know as group-specific component (GC)] and VDR genes in non-carriers of the breast cancer 1/2 early onset (BRCA1/BRCA2) gene mutations. All participating individuals in the present study were evaluated for BRCA1 mutations (5382incC, C61G and 4153delA) with HybProbe assays, and for BRCA2 mutation (5946delT) using high-resolution melting (HRM) analysis. The associations of 8 SNPs located in RXRA, GC and VDR were investigated in OC patients without the BRCA1/BRCA2 mutations (n=245) and healthy controls (n=465). Genotyping of RXRA rs10881578 and rs10776909, and GC rs1155563 and rs2298849 SNPs was conducted by HRM analysis, while RXRA rs749759, GC rs7041, VDR BsmI rs1544410 and FokI rs2228570 genotyping was performed by polymerase chain reaction-restriction fragment length polymorphism analysis. In addition, the gene-gene interactions among all tested SNPs were studied using the epistasis option in PLINK software. The lowest P-values of the trend test were identified for VDR rs1544410 and GC rs2298849 as Ptrend=0.012 and Ptrend=0.029, respectively. It was also found that, in the dominant inheritance model, VDR BsmI contributed to an increased risk of OC [odds ratio (OR), 1.570; 95% confidence interval (CI), 1.136-2.171; P=0.006; Pcorr=0.048]. The gene-gene interaction analysis indicated a significant interaction between RXRA rs749759 and VDR FokI rs2228570 (OR for interaction, 1.687; χ2=8.278; asymptotic P-value=0.004; Pcorr=0.032). In conclusion, this study demonstrated that certain VDR and RXRA SNPs may be risk factors for OC in non-carriers of BRCA1/BRCA2 mutations in the Polish population.
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Affiliation(s)
- Adrianna Mostowska
- Department of Biochemistry and Molecular Biology, Poznań University of Medical Sciences, Poznań 60-781, Poland
| | - Stefan Sajdak
- Clinic of Gynecological Surgery, Poznań University of Medical Sciences, Poznań 60-781, Poland
| | - Piotr Pawlik
- Clinic of Gynecological Surgery, Poznań University of Medical Sciences, Poznań 60-781, Poland
| | - Margarita Lianeri
- Department of Biochemistry and Molecular Biology, Poznań University of Medical Sciences, Poznań 60-781, Poland
| | - Paweł P Jagodzinski
- Department of Biochemistry and Molecular Biology, Poznań University of Medical Sciences, Poznań 60-781, Poland
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Rebholz CM, Grams ME, Lutsey PL, Hoofnagle AN, Misialek JR, Inker LA, Levey AS, Selvin E, Hsu CY, Kimmel PL, Vasan RS, Eckfeldt JH, Coresh J. Biomarkers of Vitamin D Status and Risk of ESRD. Am J Kidney Dis 2015; 67:235-42. [PMID: 26475393 DOI: 10.1053/j.ajkd.2015.08.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 08/16/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Disordered mineral metabolism is characteristic of decreased kidney function. However, the prospective associations between circulating levels of vitamin D binding protein, vitamin D, and end-stage renal disease (ESRD) have not been extensively evaluated in epidemiologic studies. STUDY DESIGN Nested case-control study. SETTING & PARTICIPANTS Middle-aged black and white men and women from 4 US communities. PREDICTORS Baseline levels of vitamin D binding protein, 25-hydroxyvitamin D (25[OH]D), and 1,25-dihydroxyvitamin D (1,25[OH]2D) were measured in blood samples collected at study visit 4 (1996-1998) of the ARIC (Atherosclerosis Risk in Communities) Study. OUTCOME ESRD cases (n=184) were identified through hospitalization diagnostic codes from 1996 to 2008 and were frequency matched to controls (n=251) on categories of estimated glomerular filtration rate, albuminuria, diabetes mellitus, sex, and race. MEASUREMENTS Logistic regression was used to estimate the association between mineral metabolism biomarkers (vitamin D binding protein, 25(OH)D, and 1,25(OH)2D) and incident ESRD, adjusting for age, sex, race, estimated glomerular filtration rate, albuminuria, diabetes mellitus, hypertension, education, specimen type, and serum levels of calcium, phosphate, and parathyroid hormone. RESULTS Higher vitamin D binding protein levels were associated with elevated risk for incident ESRD (OR, 1.76; 95% CI, 1.22-2.54; P=0.003). Higher free and bioavailable 25(OH)D levels were associated with reduced risk for incident ESRD (ORs of 0.65 [95% CI, 0.46-0.92; P=0.02] and 0.63 [95% CI, 0.43-0.91; P=0.02] for free and bioavailable 25[OH]D, respectively). There was no association between ESRD and overall levels of 25(OH)D (OR, 0.83; 95% CI, 0.58-1.19; P=0.3) or 1,25(OH)2D (OR, 0.73; 95% CI, 0.48-1.13; P=0.2). LIMITATIONS Lack of direct measurement of free and bioavailable vitamin D. CONCLUSIONS In the general population, blood levels of vitamin D binding protein were positively associated and blood levels of free and bioavailable 25(OH)D were inversely associated with new-onset ESRD during follow-up.
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Affiliation(s)
- Casey M Rebholz
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.
| | - Morgan E Grams
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; Division of Nephrology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD
| | - Pamela L Lutsey
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN
| | - Andrew N Hoofnagle
- Department of Laboratory Medicine, University of Washington, Seattle, WA
| | - Jeffrey R Misialek
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN
| | - Lesley A Inker
- William B. Schwartz Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, MA
| | - Andrew S Levey
- William B. Schwartz Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, MA
| | - Elizabeth Selvin
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; Division of General Internal Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD
| | - Chi-Yuan Hsu
- Division of Nephrology, Department of Medicine, University of California, San Francisco School of Medicine, San Francisco, CA
| | - Paul L Kimmel
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Ramachandran S Vasan
- Section of Preventive Medicine and Epidemiology, Department of Medicine, Boston University School of Medicine, Boston, MA; Section of Cardiology, Department of Medicine, Boston University School of Medicine, Boston, MA
| | - John H Eckfeldt
- Department of Laboratory Medicine and Pathology, University of Minnesota School of Medicine, Minneapolis, MN
| | - Josef Coresh
- Department of Epidemiology and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; Division of General Internal Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD
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Lai JC, Bikle DD, Lizaola B, Hayssen H, Terrault NA, Schwartz JB. Total 25(OH) vitamin D, free 25(OH) vitamin D and markers of bone turnover in cirrhotics with and without synthetic dysfunction. Liver Int 2015; 35:2294-300. [PMID: 25757956 PMCID: PMC4567539 DOI: 10.1111/liv.12819] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 03/03/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND & AIMS Current clinical assays for total 25-hydroxy (OH) vitamin D measure vitamin D bound to vitamin D-binding protein (DBP) and albumin plus unbound ('free') D. We investigated the relationship between total and free 25(OH)D with bone metabolism markers in normal (>3.5 g/dl) vs. low (≤3.5 g/dl) albumin cirrhotics. METHODS Eighty-two cirrhotics underwent measurement of free and total 25(OH)D by immunoassay, DBP and markers of bone metabolism [intact parathyroid hormone (iPTH), C-telopeptide (CTX), bone-specific alkaline phosphatase (BSAP), osteocalcin, amino-terminal pro-peptide of type 1-collagen (P1NP)]. Pearson's coefficients assessed relevant associations. RESULTS Cirrhotics with low (n = 54) vs. normal (n = 28) albumin had lower total 25(OH)D (12.1 vs. 21.7 ng/ml), free 25(OH)D (6.2vs.8.6 pg/ml) and DBP(91.4 vs. 140.3 μg/ml) [P < 0.01 for each]. iPTH was similar in low and normal albumin groups (33 vs. 28 pg/ml; P = 0.38), although serum CTX(0.46vs.0.28 ng/ml) and BSAP(31.7 vs. 24.8 μg/L) were increased (P < 0.01). An inverse relationship was observed between total 25(OH)D and iPTH in normal (r = -0.47, P = 0.01) but not low albumin cirrhotics (r = 0.07, P = 0.62). Similar associations were seen between free 25(OH)D and iPTH(Normal: r = -0.46, P = 0.01; Low: r = -0.03, P = 0.84). BSAP, osteocalcin and P1NP were elevated above the normal range in all cirrhotics but not consistently associated with total or free 25(OH)D. CONCLUSIONS Cirrhotics with low vs. normal albumin have lower levels of DBP, total and free 25(OH)D. The expected relationship between total or free 25(OH)D with iPTH was observed in normal but not in low albumin cirrhotics, demonstrating that total 25(OH)D is not an accurate marker of bioactive vitamin D status in cirrhotics with synthetic dysfunction. Additional investigation into the role of vitamin D supplementation and its impact on bone mineral homoeostasis in this population is needed.
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Affiliation(s)
- Jennifer C. Lai
- Department of Medicine, University of California-San Francisco, San Francisco, CA
| | - Daniel D. Bikle
- Department of Medicine, University of California-San Francisco, San Francisco, CA,Department of Dermatology, University of California, San Francisco, San Francisco, CA
| | - Blanca Lizaola
- Department of Medicine, St. Elizabeth’s Medical Center, Boston, MA
| | - Hilary Hayssen
- Department of Medicine, University of California-San Francisco, San Francisco, CA
| | - Norah A. Terrault
- Department of Medicine, University of California-San Francisco, San Francisco, CA
| | - Janice B. Schwartz
- Department of Medicine, University of California-San Francisco, San Francisco, CA,Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA
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Muenchhoff J, Poljak A, Song F, Raftery M, Brodaty H, Duncan M, McEvoy M, Attia J, Schofield PW, Sachdev PS. Plasma protein profiling of mild cognitive impairment and Alzheimer's disease across two independent cohorts. J Alzheimers Dis 2015; 43:1355-73. [PMID: 25159666 DOI: 10.3233/jad-141266] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
To unlock the full potential of disease modifying treatments, it is essential to develop early biomarkers for Alzheimer's disease (AD). For practical reasons, blood-based markers that could provide a signal at the stage of mild cognitive impairment (MCI) or even earlier would be ideal. Using the proteomic approach of isobaric tagging for relative and absolute quantitation (iTRAQ), we compared the plasma protein profiles of MCI, AD, and cognitively normal control subjects from two independent cohorts: the Sydney Memory and Ageing Study (261 MCI subjects, 24 AD subjects, 411 controls) and the Hunter Community Study (180 MCI subjects, 153 controls). The objective was to identify any proteins that are differentially abundant in MCI and AD plasma in both cohorts, since they might be of interest as potential biomarkers, or could help direct future mechanistic studies. Proteins representative of biological processes relevant to AD pathology, such as the complement system, the coagulation cascade, lipid metabolism, and metal and vitamin D and E transport, were found to differ in abundance in MCI. In particular, levels of complement regulators C1 inhibitor and factor H, fibronectin, ceruloplasmin, and vitamin D-binding protein were significantly decreased in MCI participants from both cohorts. Several apolipoproteins, including apolipoprotein AIV, B-100, and H were also significantly decreased in MCI. Most of these proteins have previously been reported as potential biomarkers for AD; however, we show for the first time that a significant decrease in plasma levels of two potential biomarkers (fibronectin and C1 inhibitor) is evident at the MCI stage.
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Affiliation(s)
- Julia Muenchhoff
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, Australia
| | - Anne Poljak
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, Australia Bioanalytical Mass Spectrometry Facility, University of New South Wales, Sydney, Australia School of Medical Sciences, University of New South Wales, Sydney, Australia
| | - Fei Song
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, Australia
| | - Mark Raftery
- Bioanalytical Mass Spectrometry Facility, University of New South Wales, Sydney, Australia
| | - Henry Brodaty
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, Australia
| | - Mark Duncan
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Denver-School of Medicine, Aurora, Colorado, USA Biodesix Inc., Boulder, Colorado, USA Obesity Research Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Mark McEvoy
- School of Medicine and Public Health, University of Newcastle, Newcastle, Australia
| | - John Attia
- School of Medicine and Public Health, University of Newcastle, Newcastle, Australia
| | - Peter W Schofield
- School of Medicine and Public Health, University of Newcastle, Newcastle, Australia School of Psychology, University of Newcastle, Newcastle, Australia
| | - Perminder S Sachdev
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, Australia Neuropsychiatric Institute, Prince of Wales Hospital, Sydney, Australia
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Piper MR, Freedman DM, Robien K, Kopp W, Rager H, Horst RL, Stolzenberg-Solomon RZ. Vitamin D-binding protein and pancreatic cancer: a nested case-control study. Am J Clin Nutr 2015; 101:1206-15. [PMID: 25904602 PMCID: PMC4441803 DOI: 10.3945/ajcn.114.096016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 03/16/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Vitamin D-binding protein (DBP) is the primary carrier of 25-hydroxyvitamin D [25(OH)D] in the circulation. One prospective study in male smokers found a protective association between DBP and pancreatic cancer, particularly among men with higher 25(OH)D concentrations. OBJECTIVE The objective was to examine the association between DBP and pancreatic cancer risk in an American population. DESIGN We conducted a nested case-control study in the Prostate, Lung, Colorectal, and Ovarian Cancer screening trial cohort of men and women aged 55-74 y at baseline. Between 1993 and 2010, 295 incident pancreatic adenocarcinoma cases were reported (follow-up to 15.1 y). Two controls (n = 590) were matched to each case by age, race, sex, and month of blood draw. We calculated smoking- and diabetes-adjusted ORs and 95% CIs with the use of conditional logistic regression. RESULTS DBP concentration was not significantly associated with pancreatic cancer overall [highest (≥7149.4 nmol/L) vs. lowest (<3670.4 nmol/L) quintile; OR: 1.75; 95% CI: 0.91, 3.37; P-trend = 0.25]. For serum 25(OH)D compared with the referent (50 to <75 nmol/L), individuals in the highest group had a significantly higher risk (≥100 nmol/L; OR: 3.23; 95% CI: 1.24, 8.44), whereas those in the lowest group had no significant association (<25 nmol/L; OR: 2.50; 95% CI: 0.92, 6.81). Further adjustment for DBP did not alter this association. CONCLUSION Our results do not support the hypothesis that serum DBP or 25(OH)D plays a protective role in pancreatic cancer. This trial was registered at clinicaltrials.gov as NCT00339495.
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Affiliation(s)
- Marina R Piper
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH)
| | - D Michal Freedman
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH)
| | - Kim Robien
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH)
| | - William Kopp
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH)
| | - Helen Rager
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH)
| | - Ronald L Horst
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH)
| | - Rachael Z Stolzenberg-Solomon
- From the Nutritional Epidemiology Branch (MRP and RZS-S) and the Radiation Epidemiology Branch (DMF), Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD; the Departments of Epidemiology and Biostatistics and Exercise Science, Milken Institute School of Public Health, George Washington University, Washington, DC (KR); the Clinical Support Laboratory, Leidos Biomedical Research Inc./Frederick National Laboratory for Cancer Research, Frederick, MD (WK and HR); and Heartland Assays Inc., Iowa State University, Ames, IA (RLH).
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50
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Xie X, Zhang Y, Ke R, Wang G, Wang S, Hussain T, Li S, Li M. Vitamin D-binding protein gene polymorphisms and chronic obstructive pulmonary disease susceptibility: A meta-analysis. Biomed Rep 2014; 3:183-188. [PMID: 25798246 DOI: 10.3892/br.2014.392] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 11/10/2014] [Indexed: 11/05/2022] Open
Abstract
The vitamin D-binding protein (VDBP) genetic polymorphisms have been associated with chronic obstructive pulmonary disease (COPD). A number of studies have been conducted to investigate the combined effects of the VDBP gene (GC) rs7041 and rs4588 polymorphisms on the COPD risk. However, the results obtained are inconclusive. The present meta-analysis aimed to investigate whether GC polymorphisms may be a potential risk factor for COPD. The Web of Science, PubMed, Google Scholar, Embase, Cochrane Library, China National Knowledge Infrastructure and Wanfang Database were searched from inception until June 1, 2014. The meta-analysis was performed using the STATA 12.0 software. Twelve case-control studies, including 2,937 subjects, met the inclusion criteria. Overall, a significantly increased risk was detected in populations of GC*1F homozygotes, whereas no associations between other GC polymorphisms and COPD risk were detected. According to ethnicity, the results demonstrated that the GC*1F homozygotes may be a risk factor for COPD and the GC*2 homozygotes may be a protective factor against COPD in the Asian population. However, similar associations were not observed among the Caucasian population. In conclusion, the current meta-analysis indicates that the GC*1F homozygotes may be a risk factor for COPD and the GC*2 homozygotes may be a protective factors against COPD in the Asian population.
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Affiliation(s)
- Xinming Xie
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Yonghong Zhang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Rui Ke
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Guizuo Wang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Shengyu Wang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Tafseel Hussain
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Shaojun Li
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Manxiang Li
- Department of Respiratory Medicine, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
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