1
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Jones G, Kaufmann M, St-Arnaud R. Infantile hypercalcemia type 1 (HCINF1): a rare disease resulting in nephrolithiasis and nephrocalcinosis caused by mutations in the vitamin D catabolic enzyme, CYP24A1. J Endocrinol Invest 2024:10.1007/s40618-024-02381-8. [PMID: 38780860 DOI: 10.1007/s40618-024-02381-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 04/21/2024] [Indexed: 05/25/2024]
Abstract
Infantile hypercalcemia type 1 (HCINF1), formerly known as Lightwood syndrome, is a subtype of hypercalcemia caused by loss-of-function biallelic mutations in the vitamin D catabolic enzyme, CYP24A1, which 24-hydroxylates the hormone 1,25-(OH)2D3. This short review focuses on the main features of the HCINF1 disease; emerging knowledge of the structure and function of the cytochrome P450, CYP24A1 and the location of inactivating mutations; the development of a rapid LC-MS/MS-based laboratory test for defective 24-hydroxylation; and future implications for bioanalytical assay and treatment of all types of vitamin D-related hypercalcemic conditions.
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Affiliation(s)
- G Jones
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada.
| | - M Kaufmann
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - R St-Arnaud
- Shriners Hospitals for Children-Canada and McGill University, Montreal, QC, Canada
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2
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Qu F, Zhang M, Weinstock-Guttman B, Zivadinov R, Qu J, Zhu X, Ramanathan M. An ultra-sensitive and high-throughput trapping-micro-LC-MS method for quantification of circulating vitamin D metabolites and application in multiple sclerosis patients. Sci Rep 2024; 14:5545. [PMID: 38448553 PMCID: PMC10918069 DOI: 10.1038/s41598-024-55939-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 02/29/2024] [Indexed: 03/08/2024] Open
Abstract
Quantitative analysis of the biologically-active metabolites of vitamin D (VitD), which are crucial in regulating various physiological and pathological processes, is important for clinical investigations. Liquid chromatography-tandem mass spectrometry (LC-MS) has been widely used for this purpose but existing LC-MS methods face challenges in achieving highly sensitive and accurate quantification of low-abundance VitD metabolites while maintaining high throughput and robustness. Here we developed a novel pipeline that combines a trapping-micro-LC-(T-µLC) with narrow-window-isolation selected-reaction monitoring MS(NWI-SRM) for ultra-sensitive, robust and high-throughput quantification of VitD metabolites in serum samples after derivatization. The selective-trapping and delivery approach efficiently removes matrix components, enabling high-capacity sample loading and enhancing sensitivity, throughput, and robustness. The NWI-SRM further improves the sensitivity by providing high selectivity. The lower limits of quantification (LOQs) achieved were markedly lower than any existing LC-MS methods: 1.0 pg/mL for 1,25(OH)2D3, 5.0 pg/mL for 24,25(OH)2D3, 30 pg/mL for both 25(OH)D2 and 25(OH)D3, all within a 9-min cycle. The method is applied to quantify VitD metabolites from 218 patients with multiple sclerosis. This study revealed negative correlations(r=- 0.44 to - 0.51) between the levels of 25(OH)D2 and all the three D3 metabolites in multiple sclerosis patients.
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Affiliation(s)
- Flora Qu
- Department of Biochemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Ming Zhang
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Bianca Weinstock-Guttman
- Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, Jacobs Comprehensive MS Treatment and Research Center, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Robert Zivadinov
- Buffalo Neuroimaging Analysis Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA
- Center for Biomedical Imaging at the Clinical Translational Science Institute, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Jun Qu
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA
- New York State Center of Excellence in Bioinformatics & Life Sciences, Buffalo, NY, USA
| | - Xiaoyu Zhu
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA.
| | - Murali Ramanathan
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY, USA.
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3
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Kelly E, Lindberg K, Jones-Isaac K, Yang J, Bain J, Wang L, MacDonald J, Bammler T, Calamia J, Thummel K, Yeung C, Countryman S, Koenig P, Himmelfarb J. Impact of microgravity on a three-dimensional microphysiologic culture of the human kidney proximal tubule epithelium: cell response to serum and vitamin D. RESEARCH SQUARE 2023:rs.3.rs-3778779. [PMID: 38196580 PMCID: PMC10775397 DOI: 10.21203/rs.3.rs-3778779/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
The microgravity environment aboard the International Space Station (ISS) provides a unique stressor that can help understand underlying cellular and molecular drivers of pathological changes observed in astronauts with the ultimate goals of developing strategies to enable long-term spaceflight and better treatment of diseases on Earth. We used this unique environment to evaluate the effects of microgravity on kidney proximal tubule epithelial cell (PTEC) response to serum exposure and vitamin D biotransformation capacity. To test if microgravity alters the pathologic response of the proximal tubule to serum exposure, we treated PTECs cultured in a microphysiological system (PT-MPS) with human serum and measured biomarkers of toxicity and inflammation (KIM-1 and IL-6) and conducted global transcriptomics via RNAseq on cells undergoing flight (microgravity) and respective controls (ground). We also treated 3D cultured PTECs with 25(OH)D3 (vitamin D) and monitored vitamin D metabolite formation, conducted global transcriptomics via RNAseq, and evaluated transcript expression of CYP27B1, CYP24A1, or CYP3A5 in PTECs undergoing flight (microgravity) and respective ground controls. We demonstrated that microgravity neither altered PTEC metabolism of vitamin D nor did it induce a unique response of PTECs to human serum, suggesting that these fundamental biochemical pathways in the kidney proximal tubule are not significantly altered by short-term exposure to microgravity. Given the prospect of extended spaceflight, more study is needed to determine if these responses are consistent with extended (> 6 month) exposure to microgravity.
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4
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Al-Ashwal A, Al Zahrani A, Dammas N, Aletani L, Alhuthil R. CYP3A4 Mutation Causes Vitamin D-Dependent Rickets Type 3: A Case Report in Saudi Arabia. Cureus 2023; 15:e49976. [PMID: 38179381 PMCID: PMC10765270 DOI: 10.7759/cureus.49976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2023] [Indexed: 01/06/2024] Open
Abstract
Rickets is a childhood disorder of vitamin D deficiency that is characterized by growth retardation and impairment in skeletal mineralization. Vitamin D deficiency is usually due to decreased dietary vitamin D intake, decreased sunlight exposure, or genetic defects. A recurrent gain-of-function missense mutation (p.I301T) in the gene encoding CYP3A4 has been identified as a cause of excessive inactivation of vitamin D metabolites that causes vitamin D-dependent rickets type 3 (VDDR3). We hereby report a case of a six-year-old girl with poor growth and bone deformities, such as genu valgum. In addition, the patient has a strong family history of short stature and bone deformities. She continues to receive multidisciplinary care, and the finding of a heterozygous missense variant in CYP3A4: c.902 T > C; p.Ile301Thr in the CYP3A4 gene confirms the diagnosis of VDDR3. To our knowledge, this is the first case to be reported in Saudi Arabia and the fourth case in the literature. Our findings highlight the importance of vitamin D in those with high activity in CYP3A4 to maintain vitamin D hemostasis, and we need to reach optimal doses to help them maintain their biochemical and radiological finding within the normal range.
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Affiliation(s)
- Abdullah Al-Ashwal
- Pediatric Endocrinology, King Faisal Specialist Hospital and Research Centre, Riyadh, SAU
| | - Asma Al Zahrani
- Pediatric Endocrinology, King Faisal Specialist Hospital and Research Centre, Riyadh, SAU
| | - Nada Dammas
- Pediatrics, King Faisal Specialist Hospital and Research Centre, Riyadh, SAU
| | - Lujain Aletani
- Pediatric Endocrinology, King Faisal Specialist Hospital and Research Centre, Riyadh, SAU
| | - Raghad Alhuthil
- Pediatrics, King Faisal Specialist Hospital and Research Centre, Riyadh, SAU
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5
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Jin Z, Bertholf RL, Yi X. Advances and challenges in the measurement of 1,25-dihydroxyvitamin D: a comprehensive review. Crit Rev Clin Lab Sci 2023; 60:535-548. [PMID: 37272827 DOI: 10.1080/10408363.2023.2212765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/16/2023] [Accepted: 05/08/2023] [Indexed: 06/06/2023]
Abstract
Vitamin D has received significant attention from clinical societies, researchers, and the general population in recent years. While 25-hydroxyvitamin D (25(OH)D) is the most commonly-used biomarker of vitamin D status, 1α,25-dihydroxyvitamin D (1,25(OH)2D), its bioactive form, plays a critical role in regulating calcium and phosphorus homeostasis and is also involved in the immune system and cellular differentiation. Consequently, accurate measurements of 1,25(OH)2D can aid in the differential diagnosis of calcium-related disorders such as hypocalcemia in vitamin D-dependent rickets and hypercalcemia due to inappropriate increase of serum 1,25(OH)2D in granulomatous diseases. However, due to its lipophilicity and very low circulating concentration, the measurement of 1,25(OH)2D is particularly challenging. Over the past several decades, numerous efforts have been made to develop sensitive, specific, and practical laboratory methods for measuring 1,25(OH)2D. Methods using radioreceptor assay, radioimmunoassay, enzyme immunoassay, enzyme-linked immunosorbent assay, automated chemiluminescent immunoassay, and liquid chromatography-tandem mass spectrometry have been described. Each of these methods has unique advantages and limitations, and some are no longer used. Despite the sophisticated methods in use today, substantial variations between methods still exist. A concerted effort toward standardization of 1,25(OH)2D measurement is needed to ensure accurate and reliable results across laboratories and methods.
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Affiliation(s)
- Zhicheng Jin
- Department of Pathology and Laboratory Medicine, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Roger L Bertholf
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, USA
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Xin Yi
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, USA
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, USA
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6
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Lenherr-Taube N, Furman M, Assor E, Thummel K, Levine MA, Sochett E. Rifampin monotherapy for children with idiopathic infantile hypercalcemia. J Steroid Biochem Mol Biol 2023; 231:106301. [PMID: 36990163 PMCID: PMC10441173 DOI: 10.1016/j.jsbmb.2023.106301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/09/2023] [Accepted: 03/26/2023] [Indexed: 03/29/2023]
Abstract
Idiopathic Infantile Hypercalcemia (IIH) is characterized by hypercalcemia and hypercalciuria owing to PTH-independent increases in circulating concentrations of 1,25(OH)2D. At least 3 forms of IHH can be distinguished genetically and mechanistically: infantile hypercalcemia-1 (Hypercalcemia, Infantile, 1; HCINF1) due to CYP24A1 mutations results in decreased inactivation of 1,25(OH)2D; HCINF2 due to SLC34A1 mutations results in excessive 1,25(OH)2D production; and HCINF3 in which a variety of gene variants of uncertain significance (VUS) have been identified and where the mechanism for increased 1,25 (OH)2D is unclear. Conventional management with dietary calcium and vitamin D restriction has only limited success. Induction of the P450 enzyme CYP3A4 by rifampin can provide an alternate pathway for inactivation of 1,25(OH)2D that is useful in HCINF1 and may be effective in other forms of IIH. We sought to assess the efficacy of rifampin to decrease levels of serum 1,25(OH)2D and calcium, and urinary calcium concentrations in subjects with HCINF3, and to compare the response to a control subject with HCINF1. Four subjects with HCINF3 and the control subject with HCINF1 completed the study using rifampin 5 mg/kg/day and 10 mg/kg/day each for 2 months separated by a 2-month washout period. Patients had age-appropriate intake of dietary calcium plus 200 IU vitamin D/day. Primary outcome was efficacy of rifampin to lower serum concentrations of 1,25(OH)2D. The secondary outcomes included the reduction of serum calcium, urinary calcium excretion (as random urine calcium: creatinine (ca:cr) ratio) and serum 1,25(OH)2D/PTH ratio. Rifampin was well tolerated and induced CYP3A4 at both doses in all subjects. The control subject with HCINF1 showed significant response to both rifampin doses with decreases in the serum concentration of 1,25(OH)2D and the 1,25(OH)2D/PTH ratio while the serum and urine ca:cr levels were unchanged. The four patients with HCINF3 showed reductions in 1,25(OH)2D and urinary ca:cr after 10 mg/kg/d, but hypercalcemia did not improve and there were variable responses in 1,25(OH)2D/PTH ratios. These results support further longer-term studies to clarify the usefulness of rifampin as a medical therapy for IIH.
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Affiliation(s)
- Nina Lenherr-Taube
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada; Department of Pediatrics, Division of Endocrinology, University Children's Hospital Zurich, Zurich, Switzerland.
| | - Michelle Furman
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Esther Assor
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Kenneth Thummel
- Department of Pharmaceutics, University of Washington, Seattle, WA, United States
| | - Michael A Levine
- Division of Endocrinology and Diabetes, The Children's Hospital of Philadelphia and Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, United States
| | - Etienne Sochett
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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7
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Asfour MH, Abd El-Alim SH, Kassem AA, Salama A, Gouda AS, Nazim WS, Nashaat NH, Hemimi M, Abdel Meguid N. Vitamin D 3-Loaded Nanoemulsions as a Potential Drug Delivery System for Autistic Children: Formulation Development, Safety, and Pharmacokinetic Studies. AAPS PharmSciTech 2023; 24:58. [PMID: 36759398 DOI: 10.1208/s12249-023-02501-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 12/27/2022] [Indexed: 02/11/2023] Open
Abstract
The aim of the current study is the development of a vitamin D3 (VD3)-loaded nanoemulsion (NE) formulation to improve VD3 oral bioavailability for management of vitamin D inadequacy in autistic children. Eight NE formulations were prepared by high-speed homogenization followed by ultrasonication. Four vegetable oils were employed along with two concentrations of Span 20 as the emulsifier. Glycerol, fructose, and mango flavor were included as viscosity modifier, sweetening, and flavoring agents, respectively. The prepared VD3-loaded NE formulations exhibited high drug content (> 98%), droplet size (DS) ranging from 61.15 to 129.8 nm with narrow size distribution, zeta potential values between - 9.83 and - 19.22 mV, and acceptable pH values (4.59-5.89). Storage stability showed that NE formulations underwent coalescence and phase separation during 6 months at room temperature, whereas at refrigerated conditions, formulations showed slight creaming. The optimum formulation (VD3-NE6) revealed a non-significant DS growth at refrigerated conditions and spherical morphology under transmission electron microscopy. VD3-NE6 did not produce any toxic effects to rats treated orally for 3 months, where normal blood picture and kidney and liver functions were observed compared to control rats. Also, serum calcium, oxidative stress, and apoptosis biomarkers remained within normal levels, indicating the safety of the optimum formulation. Furthermore, evaluation of VD3-NE6 oral bioavailability depicted a significant increase in AUC0-72 and Cmax with decreased Tmax compared to plain VD3. The optimum formulation demonstrated improved stability, safety, and oral bioavailability indicating the potential for successful management of vitamin D deficiency in autistic children.
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Affiliation(s)
- Marwa Hasanein Asfour
- Pharmaceutical Technology Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Sameh Hosam Abd El-Alim
- Pharmaceutical Technology Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt.
| | - Ahmed Alaa Kassem
- Pharmaceutical Technology Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Abeer Salama
- Pharmacology Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Amr Sobhi Gouda
- Biochemical Genetics Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Walaa Samy Nazim
- Biochemical Genetics Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Neveen Hassan Nashaat
- Research On Children With Special Needs Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Maha Hemimi
- Research On Children With Special Needs Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Nagwa Abdel Meguid
- Research On Children With Special Needs Department, National Research Centre, El-Buhouth St., Dokki, 12622, Cairo, Egypt
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8
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Naik M, Kamath U S, Uppangala S, Adiga SK, Patil A. Vitamin D metabolites and analytical challenges. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:399-410. [PMID: 36628933 DOI: 10.1039/d2ay01692c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Vitamin D is an essential micronutrient for bone health and the general cellular functions of the body. Its insufficiency/deficiency leads to the pathophysiology of disorders like diabetes, cancer, autoimmune, neurodegenerative, and cardiovascular diseases. Clinical interest in Vitamin D metabolites and their role in various medical disorders have contributed to an increase in laboratory demands for vitamin D measurements. For clinical and research laboratories worldwide, analysis of vitamin D and associated metabolites is a significant problem. The best way for determining vitamin D levels is constantly being debated. Various methods such as immunoassays and chromatographic techniques are available for determining vitamin D levels. Additionally, biosensors have recently been considered promising options for routine vitamin D analysis. The existing methods and other developments in the measurement of vitamin D metabolites and associated analytical challenges are discussed in this review.
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Affiliation(s)
- Megha Naik
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education (MAHE), India-576 104.
| | - Saritha Kamath U
- Department of Medical Laboratory Technology, Manipal College of Health Professions, Manipal Academy of Higher Education (MAHE), Manipal, India-576 104
| | - Shubhashree Uppangala
- Division of Reproductive Genetics, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education (MAHE), Manipal, India-576 104
| | - Satish Kumar Adiga
- Division of Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education (MAHE), Manipal, India-576 104
| | - Ajeetkumar Patil
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education (MAHE), India-576 104.
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9
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Reddy DVS, Shafi H, Bharti R, Roy T, Verma S, Raman SK, Verma K, Azmi L, Ray L, Singh J, Singh AK, Mugale MN, Misra A. Preparation and Evaluation of Low-Dose Calcitriol Dry Powder Inhalation as Host-Directed Adjunct Therapy for Tuberculosis. Pharm Res 2022; 39:2621-2633. [PMID: 35962268 PMCID: PMC9374297 DOI: 10.1007/s11095-022-03360-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 08/05/2022] [Indexed: 11/24/2022]
Abstract
Background It is unclear whether Vitamin D is efficacious as a host-directed therapy (HDT) for patients of tuberculosis (TB). We investigated pulmonary delivery of the active metabolite of Vitamin D3, i.e., 1, 25-dihydroxy vitamin D3 (calcitriol) in a mouse model of infection with Mycobacterium tuberculosis (Mtb). Methods We optimized a spray drying process to prepare a dry powder inhalation (DPI) of calcitriol using a Quality by Design (QbD) approach. We then compared outcomes when Mtb-infected mice were treated with inhaled calcitriol at 5 ng/kg as a stand-alone intervention versus DPI as adjunct to standard oral anti-tuberculosis therapy (ATT). Results The DPI with or without concomitant ATT markedly improved the morphology of the lungs and mitigated histopathology in both the lungs and the spleens. The number of nodular lesions on the lung surface decreased from 43.7 ± 3.1 to 22.5 ± 3.9 with the DPI alone and to 9.8 ± 2.5 with DPI + ATT. However, no statistically significant induction of host antimicrobial peptide cathelicidin or reduction in bacterial burden was seen with the DPI alone. DPI + ATT did not significantly reduce the bacterial burden in the lungs compared to ATT alone. Conclusions We concluded that HDT using the low dose calcitriol DPI contributed markedly to mitigation of pathology, but higher dose may be required to evoke significant induction of bactericidal host response and bactericidal activity in the lung.
Supplementary Information The online version contains supplementary material available at 10.1007/s11095-022-03360-5.
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Affiliation(s)
- D V Siva Reddy
- CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, U.P, India
| | - Hasham Shafi
- CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Reena Bharti
- CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Trisha Roy
- CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, U.P, India
| | - Sonia Verma
- CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, U.P, India
| | | | - Khushboo Verma
- CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, U.P, India
| | - Lubna Azmi
- CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Lipika Ray
- CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Jyotsna Singh
- CSIR-Indian Institute of Toxicology Research, Lucknow, 226001, India
| | - Amit Kumar Singh
- National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, 282004, India
| | - Madhav N Mugale
- CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Amit Misra
- CSIR-Central Drug Research Institute, Lucknow, 226031, India.
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10
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Haris A, Lam YPY, Wootton CA, Theisen A, Marzullo BP, Schorr P, Volmer DA, O’Connor PB. Differentiation of Dihydroxylated Vitamin D 3 Isomers Using Tandem Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:1022-1030. [PMID: 35561028 PMCID: PMC9164238 DOI: 10.1021/jasms.2c00085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 06/15/2023]
Abstract
Vitamin D compounds are a group of secosteroids derived from cholesterol that are vital for maintaining bone health in humans. Recent studies have shown extraskeletal effects of vitamin D, involving vitamin D metabolites such as the dihydroxylated vitamin D3 compounds 1,25-dihydroxyvitamin D3 and 24,25-dihydroxyvitamin D3. Differentiation and characterization of these isomers by mass spectrometry can be challenging due to the zero-mass difference and minor structural differences between them. The isomers usually require separation by liquid chromatography (LC) prior to mass spectrometry, which adds extra complexity to the analysis. Herein, we investigated and revisited the use of fragmentation methods such as collisional induced dissociation (CID), infrared multiphoton dissociation (IRMPD), electron induced dissociation (EID), and ultraviolet photodissociation (UVPD), available on a 12T Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) to generate characteristic fragments for the dihydroxylated vitamin D3 isomers that can be used to distinguish between them. Isomer-specific fragments were observed for the 1,25-dihydroxyvitamin D3, which were clearly absent in the 24,25-dihydroxyvitamin D3 MS/MS spectra using all fragmentation methods mentioned above. The fragments generated due to cleavage of the C-6/C-7 bond in the 1,25-dihydroxyvitamin D3 compound demonstrate that the fragile OH groups were retained during fragmentation, thus enabling differentiation between the two dihydroxylated vitamin D3 isomers without the need for prior chromatographic separation or derivatization.
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Affiliation(s)
- Anisha Haris
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Yuko P. Y. Lam
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | | | - Alina Theisen
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Bryan P. Marzullo
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Pascal Schorr
- Institut
für Chemie, Humboldt-Universität
zu Berlin, 12489 Berlin, Germany
| | - Dietrich A. Volmer
- Institut
für Chemie, Humboldt-Universität
zu Berlin, 12489 Berlin, Germany
| | - Peter B. O’Connor
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
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11
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An ultrasensitive UHPLC-ESI-MS/MS method augmented with a controlled microwave derivatization reaction for quantitation of vitamin D3 and its major metabolites in COVID-19 patients. Talanta 2022; 246:123497. [PMID: 35487016 PMCID: PMC9023092 DOI: 10.1016/j.talanta.2022.123497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/14/2022] [Accepted: 04/19/2022] [Indexed: 11/20/2022]
Abstract
It is established that vitamin D deficiency is correlated with the disease severity in COVID-19 patients. However, the reliable and sensitive quantitation of vitamin D3 (D3) and its metabolites remains a difficult challenge. Herein, a novel ultrasensitive and reliable UHPLC-ESI-MS/MS method was developed and validated for the quantitation of D3 and its major metabolites in COVID-19 patients. The mass spectral sensitivity was augmented via controlled microwave-assisted derivatization reaction (CMDR) with 2-nitrosopyridine (Pyr-NO) at 65 °C for 2 min. CMDR hyphenation with UHPLC-MS/MS improves detection sensitivity while shortening separation and derivatization reaction times. The precursor to product ion transitions for D3, 25-hydroxy D3 (25(OH)D3), 1,25-dihydroxy D3 (1,25-(OH)2D3) and calcipotriol (CPT) as an internal standard were m/z 493.4 → 231.3, m/z 509.4 → 231.3, m/z 525.4 → 247.3, and m/z 521.4 → 247.3; respectively. The separation of the formed derivatives was conducted using a gradient elution mode with mobile phase A: formic acid (0.1%) in water and mobile phase B: formic acid (0.1%) in acetonitrile. The elution started with 40% (v/v) of B for 0.3 min then increased linearly to 90% (v/v) at 2 min on an Agilent EclipsePlus C18 (50 × 2.1 mm, 1.8 μm) column at a flow rate of 0.3 mL min−1. The method was validated using FDA standards for bioanalytical method validation over a concentration range of 0.02–50 ng mL−1 with correlation coefficient ≥0.9987 and the lower limit of quantitation (LLOQ) were 0.02–0.05 ng mL−1 in human plasma. The developed method has demonstrated excellent comparability to a well-established chemiluminescent immunoassay (CLIA) method for the analysis of D3 metabolites in human samples. The developed UHPLC-ESI-MS/MS method was implemented for routine and reliable quantitation of D3 and its major metabolites in COVID-19 patients.
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12
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Wang D, Yu S, Zhang Q, Cheng Q, Xie S, Zhang Y, Guo X, Zou Y, Yin Y, Yu J, Li H, Xia L, Qiu L, Xia W. A robust method for simultaneous measurement of serum 25(OH)D, 1,25(OH) 2 D, and 24,25(OH) 2 D by liquid chromatography-tandem mass spectrometry with efficient separation of 3-epi analogs, 23R,25(OH) 2 D 3 , and 4β,25(OH) 2 D 3. JOURNAL OF MASS SPECTROMETRY : JMS 2022; 57:e4792. [PMID: 34913542 DOI: 10.1002/jms.4792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/18/2021] [Accepted: 10/31/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND This study aimed to establish a robust, simple method to detect 25-hydroxyvitamin D3 (25(OH)D3 ), 25-hydroxyvitamin D2 (25(OH)D2 ), 1,25-dihydroxyvitamin D3 (1,25(OH)2 D3 ), 1,25-dihydroxyvitamin D2 (1,25(OH)2 D2 ), 24,25-dihydroxyvitamin D3 (24,25(OH)2 D3 ), and 24,25-dihydroxyvitamin D2 (24,25(OH)2 D2 ) simultaneously with efficient separation of 3-epi 25(OH)D3 , 3-epi 24,25(OH)2 D3 , 23R,25(OH)2 D3 , and 4β,25-dihydroxyvitamin D3 (4β,25(OH)2 D3 ) by liquid chromatography-tandem mass spectrometry (LC-MS/MS). METHOD This method was validated according to procedures established by Clinical and Laboratory Standards Institute (CLSI) and then applied in healthy population to determine the distribution of the vitamin D metabolites by LC-MS/MS. RESULTS The total-run CV% of 25(OH)D3 , 25(OH)D2 , 24,25(OH)2 D3 , 24,25(OH)2 D2 , 1,25(OH)2 D3 , and 1,25(OH)2 D2 were 6.30%-8.40%, 5.00%-8.40%, 5.90%-9.00%, 5.60%-9.00%, 5.60%-8.00%, and 7.00%-9.70%, respectively. The linearity correlation coefficients r of these six vitamin D metabolites were >0.99. The matrix effects of 25(OH)D3 , 25(OH)D2 , 24,25(OH)2 D3 , 24,25(OH)2 D2 , 1,25(OH)2 D3 , and 1,25(OH)2 D2 were 90.6%-103.3%, 97.3%-106.3%, 90.7%-106.3%, 100.7%-114.5%, 97.9%-104.6%, and 97.0%-111.0%. The trueness values of 25(OH)D3 , 25(OH)D2 , and 24,25(OH)2 D3 were 93.8%-103.0%, 101.0%, and 96.3%-100%, respectively. CONCLUSION This study successfully established an efficient, accurate, robust method for simultaneous measurement of serum 25(OH)D, 1,25(OH)2 D, and 24,25(OH)2 D by LC-MS/MS with efficient separation of 3-epi analogs, 23R,25(OH)2 D3 , and 4β,25(OH)2 D3 .
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Affiliation(s)
- Danchen Wang
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Songlin Yu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
- Technology Innovation Center of Mass Spectrometry for State Market Regulation, Center for Advanced Measurement Science, National Institute of Metrology, Beijing, 100029, China
| | - Qi Zhang
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Qian Cheng
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Shaowei Xie
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yuanyuan Zhang
- Department of Application Support Center, Shanghai AB Sciex Analytical Instrument Trading Co., Ltd., Beijing, China
| | - Xiuzhi Guo
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yutong Zou
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yicong Yin
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Jialei Yu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Honglei Li
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Liangyu Xia
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Ling Qiu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Chinese Academy of Medical Sciences, Beijing, 100730, China
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Weibo Xia
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China
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Jin Z, Bertholf RL, Yi X. Overcome Isomer Interference in 1α,25-Dihydroxyvitamin D Quantitation by Liquid Chromatography-Tandem Mass Spectrometry. J Appl Lab Med 2021; 7:737-746. [PMID: 34632483 DOI: 10.1093/jalm/jfab112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/16/2021] [Indexed: 11/12/2022]
Abstract
BACKGROUND The circulating concentration of 1α,25-dihydroxyvitamin D [1α,25(OH)2D] is very low, and the presence of multiple isomers may lead to inaccurate quantitation if not separated prior to analysis. Antibody-based immunoextraction procedures are sometimes used to remove structurally related isomers of 1α,25(OH)2D prior to an LC-MS/MS analysis. However, immunoextraction increases sample preparation time and cost. In addition, some dihydroxyvitamin D metabolites are not completely removed by immunoextraction. METHOD We developed an HPLC method using a phenyl-hexyl column to investigate interfering isomers of 1α,25(OH)2D. RESULT Using this method, 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD) derivatization product of 1α,25(OH)2D was found to be present as 2 epimers, which were separated chromatographically with an area ratio of 2:1. PTAD derivatized metabolite of 25-hydroxyvitamin D3 [i.e., 4β,25-dihydroxyvitamin D3 (4β,25(OH)2D3)] eluted out between 6R and 6S epimers of derivatized 1α,25(OH)2D3. If not chromatographically resolved, 4β,25(OH)2D can affect 1α,25(OH)2D quantitation. In a method comparison study, it was found that the presence of 4β,25(OH)2D produced positive bias up to 127% on 1α,25(OH)2D3 quantitation. CONCLUSION The LC-MS/MS method we developed without an immunoextraction procedure was able to resolve the major interference peak from 1α,25(OH)2D and achieved reliable quantitation of 1α,25(OH)2D.
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Affiliation(s)
- Zhicheng Jin
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Roger L Bertholf
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, USA.,Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Xin Yi
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, USA.,Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, USA
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Lenherr-Taube N, Young EJ, Furman M, Elia Y, Assor E, Chitayat D, Uster T, Kirwin S, Robbins K, Vinette KMB, Daneman A, Marshall CR, Collins C, Thummel K, Sochett E, Levine MA. Mild Idiopathic Infantile Hypercalcemia-Part 1: Biochemical and Genetic Findings. J Clin Endocrinol Metab 2021; 106:2915-2937. [PMID: 34125233 PMCID: PMC8475208 DOI: 10.1210/clinem/dgab431] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Indexed: 11/19/2022]
Abstract
CONTEXT Idiopathic infantile hypercalcemia (IIH), an uncommon disorder characterized by elevated serum concentrations of 1,25 dihydroxyvitamin D (1,25(OH)2D) and low parathyroid hormone (PTH) levels, may present with mild to severe hypercalcemia during the first months of life. Biallelic variants in the CYP24A1 or SLC34A1 genes are associated with severe IIH. Little is known about milder forms. OBJECTIVE This work aims to characterize the genetic associations and biochemical profile of mild IIH. METHODS This is a cross-sectional study including children between age 6 months and 17 years with IIH who were followed in the Calcium Clinic at the Hospital for Sick Children (SickKids), Toronto, Canada. Twenty children with mild IIH on calcium-restricted diets were evaluated. We performed a dietary assessment and analyzed biochemical measures including vitamin D metabolites and performed a stepwise molecular genetic analysis. Complementary biochemical assessments and renal ultrasounds were offered to first-degree family members of positive probands. RESULTS The median age was 16 months. Median serum levels of calcium (2.69 mmol/L), urinary calcium:creatinine ratio (0.72 mmol/mmol), and 1,25(OH)2D (209 pmol/L) were elevated, whereas intact PTH was low normal (22.5 ng/L). Mean 1,25(OH)2D/PTH and 1,25(OH)2D/25(OH)D ratios were increased by comparison to healthy controls. Eleven individuals (55%) had renal calcification. Genetic variants were common (65%), with the majority being heterozygous variants in SLC34A1 and SLC34A3, while a minority showed variants of CYP24A1 and other genes related to hypercalciuria. CONCLUSION The milder form of IIH has a distinctive vitamin D metabolite profile and is primarily associated with heterozygous SLC34A1 and SLC34A3 variants.
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Affiliation(s)
- Nina Lenherr-Taube
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Edwin J Young
- Genome Diagnostics, Department of Paediatric Medicine, The Hospital for Sick Children, M5G 1X8 Toronto, Ontario, Canada
| | - Michelle Furman
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Yesmino Elia
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Esther Assor
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - David Chitayat
- Department of Obstetrics and Gynecology, The Prenatal Diagnosis and Medical Genetics Program, Mount Sinai Hospital, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
- Department of Pediatrics, Division of Clinical Genetics and Metabolism, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Tami Uster
- Department of Obstetrics and Gynecology, The Prenatal Diagnosis and Medical Genetics Program, Mount Sinai Hospital, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Susan Kirwin
- Nemours Molecular Diagnostics Laboratory, Nemours Children’s Health System, Wilmington, Delaware 19802, USA
| | - Katherine Robbins
- Nemours Molecular Diagnostics Laboratory, Nemours Children’s Health System, Wilmington, Delaware 19802, USA
| | - Kathleen M B Vinette
- Nemours Molecular Diagnostics Laboratory, Nemours Children’s Health System, Wilmington, Delaware 19802, USA
| | - Alan Daneman
- Department of Diagnostic Imaging, Division of General Radiology and Body Imaging, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Christian R Marshall
- Genome Diagnostics, Department of Paediatric Medicine, The Hospital for Sick Children, M5G 1X8 Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Ontario, Canada
| | - Carol Collins
- Department of Pharmaceutics, University of Washington, Seattle, Washington 98195, USA
| | - Kenneth Thummel
- Department of Pharmaceutics, University of Washington, Seattle, Washington 98195, USA
| | - Etienne Sochett
- Department of Pediatrics, Division of Endocrinology, The Hospital for Sick Children, University of Toronto, M5G 1X8 Toronto, Ontario, Canada
| | - Michael A Levine
- Division of Endocrinology and Diabetes and Center for Bone Health, Children’s Hospital of Philadelphia and Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania 19104, USA
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Ismail HM, Algrafi AS, Amoudi O, Ahmed S, Al-Thagfan SS, Shora H, Aljohani M, Almutairi M, Alharbi F, Alhejaili A, Alamri M, Muhawish A, Abdallah A. Vitamin D and Its Metabolites Deficiency in Acute Coronary Syndrome Patients Undergoing Coronary Angiography: A Case-Control Study. Vasc Health Risk Manag 2021; 17:471-480. [PMID: 34408425 PMCID: PMC8364363 DOI: 10.2147/vhrm.s312376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 07/15/2021] [Indexed: 12/26/2022] Open
Abstract
Background Vitamin D deficiency is considered an emerging health problem that affects at least one billion patients worldwide. Calcitriol 1,25(OH)2D3 has several systemic effects, including anti-inflammatory, anti-thrombotic and anti-atherosclerotic impacts that explain its cardioprotective effects. The precise association between vitamin D and its metabolites and the value of supplements in acute coronary syndrome (ACS) is still controversial. This study aims to search the association between vitamin D2, D3, and metabolites and ACS in patients undergoing coronary angiography. Materials and Methods This was a case–control study on 73 consecutive adult patients with ACS undergoing coronary angiography compared to 50 controls without coronary artery disease and matched for age and sex from June 2019 till July 2019. Echocardiography and coronary angiography were done for all cases. Plasma vitamin D and its metabolites were measured at admission for all participants along with chemistry profiles. Results Vitamin D and its metabolites were statistically significantly lower in ACS patients than the controls. Multivariate regression analysis revealed that low levels of 25-hydroxyvitamin D (25(OH)D) and 1,25-dihydroxyvitamin D (1,25(OH)2D) significantly predicted ACS occurrence; the other significant predictors were high systolic blood pressure (BP), high total cholesterol, and low high-density lipoprotein-cholesterol. Interestingly, vitamin D2 and D3 did not significantly predict ACS (p>0.05). We did not find a statistically significant association between the number of affected coronary vessels and vitamin D metabolites. Moreover, there was no statistically significant correlation between vitamin D and its metabolites and left ventricular ejection fraction measured by echocardiography. Conclusion There was a strong association between vitamin D and all its metabolites with ACS. Significantly, low 25(OH)D and 1,25(OH)2D predicted ACS, but vitamin D2 and D3 did not. Large randomized controlled trials are needed to verify the beneficial values of vitamin D supplementation in ACS patients.
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Affiliation(s)
- Hussein M Ismail
- Department of cardiology, College of Medicine, Suez Canal University, Ismailia, Egypt.,Department of medicine, College of Medicine, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | - Abeer S Algrafi
- Department of medicine, College of Medicine, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | - Osama Amoudi
- Madinah Cardiac Center, Adult cardiology, Al-Madinah Al-Munawara, Saudi Arabia
| | - Sameh Ahmed
- Department of Pharmacognosy and Pharmaceutical Chemistry, College of Pharmacy, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | - Sultan S Al-Thagfan
- Department of Clinical and Hospital Pharmacy, College of Pharmacy, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | - Hassan Shora
- Department of molecular biology/biochemistry, Port Said University, Port Said, Egypt
| | - Mohammed Aljohani
- Medical intern, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | | | - Fahad Alharbi
- Medical intern, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | | | - Majed Alamri
- Medical intern, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | - Abdullah Muhawish
- Medical intern, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
| | - Ayat Abdallah
- Epidemiology and Preventive Medicine Department, National Liver Institute, Shebin El-Kom, Egypt.,Department of Family and Community Medicine, Taibah University, Al-Madinah Al-Munawara, Saudi Arabia
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Fohner AE, Dalton R, Skagen K, Jackson K, Claw KG, Hopkins SE, Robinson R, Khan BA, Prasad B, Schuetz EG, Nickerson DA, Thornton TA, Dillard DA, Boyer BB, Thummel KE, Woodahl EL. Characterization of CYP3A pharmacogenetic variation in American Indian and Alaska Native communities, targeting CYP3A4*1G allele function. Clin Transl Sci 2021; 14:1292-1302. [PMID: 33503331 PMCID: PMC8301563 DOI: 10.1111/cts.12970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 12/13/2020] [Accepted: 12/13/2020] [Indexed: 01/08/2023] Open
Abstract
The frequencies of genetic variants in the CYP3A4 and CYP3A5 genes differ greatly across global populations, leading to profound differences in the metabolic activity of these enzymes and resulting drug metabolism rates, with important consequences for therapeutic safety and efficacy. Yet, the impact of genetic variants on enzyme activity are incompletely described, particularly in American Indian and Alaska Native (AIAN) populations. To characterize genetic variation in CYP3A4 and CYP3A5 and its effect on enzyme activity, we partnered with AIAN people living in two regions of Alaska: Yup'ik Alaska Native people living in the Yukon-Kuskokwim Delta region of rural southwest Alaska and AIAN people receiving care at the Southcentral Foundation in Anchorage, Alaska. We identified low frequencies of novel and known variation in CYP3A4 and CYP3A5, including low frequencies of the CYP3A4*1G and CYP3A5*1 variants, and linkage disequilibrium patterns that differed from those we previously identified in an American Indian population in western Montana. We also identified increased activity of the CYP3A4*1G allele in vitro and in vivo. We demonstrated that the CYP3A4*1G allele confers increased protein content in human lymphoblastoid cells and both increased protein content and increased activity in human liver microsomes. We confirmed enhanced CYP3A4-mediated 4β-vitamin D hydroxylation activity in Yup'ik people with the CYP3A4*1G allele. AIAN people in Alaska and Montana who carry the CYP3A4*1G allele-coupled with low frequency of the functional CYP3A5*1 variant-may metabolize CYP3A substrates more rapidly than people with the reference CYP3A4 allele.
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Affiliation(s)
- Alison E. Fohner
- Department of EpidemiologyUniversity of WashingtonSeattleWashingtonUSA
| | - Rachel Dalton
- Department of Biomedical and Pharmaceutical SciencesUniversity of MontanaMissoulaMontanaUSA
| | - Kasse Skagen
- Department of Biomedical and Pharmaceutical SciencesUniversity of MontanaMissoulaMontanaUSA
| | - Konner Jackson
- Department of Biomedical and Pharmaceutical SciencesUniversity of MontanaMissoulaMontanaUSA
| | - Katrina G. Claw
- Division of Biomedical Informatics and Personalized MedicineUniversity of ColoradoAuroraColoradoUSA
| | - Scarlett E. Hopkins
- Department of Obstetrics and GynecologyOregon Health & Science UniversityPortlandOregonUSA
| | | | | | - Bhagwat Prasad
- Department of PharmaceuticsUniversity of WashingtonSeattleWashingtonUSA
| | - Erin G. Schuetz
- Department of Pharmaceutical SciencesSt. Jude Children’s Research HospitalMemphisTennesseeUSA
| | | | | | | | - Bert B. Boyer
- Department of Obstetrics and GynecologyOregon Health & Science UniversityPortlandOregonUSA
| | | | - Erica L. Woodahl
- Department of Biomedical and Pharmaceutical SciencesUniversity of MontanaMissoulaMontanaUSA
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Wang Y, Jiang L. Role of vitamin D-vitamin D receptor signaling on hyperoxia-induced bronchopulmonary dysplasia in neonatal rats. Pediatr Pulmonol 2021; 56:2335-2344. [PMID: 33878208 DOI: 10.1002/ppul.25418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/25/2021] [Accepted: 04/03/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND Vitamin D exerts therapeutic effects on bronchopulmonary dysplasia (BPD), but its underlying mechanisms remain unclear. The present study was designed to investigate the effects of vitamin D on hyperoxia-induced BPD and elucidate the underlying mechanisms. METHODS Neonatal rats were exposed to either room air (control) or 75% O2 (hyperoxia) and intraperitoneally injected with vitamin D3. After 14 days, a histopathological examination was performed in the lungs of rats. Serum 25-hydroxyvitamin D (25OHD) was measured by liquid chromatography-tandom mass spectrometry (LC-MS)/MS. Interleukin 1 beta (IL-1β) and interferon gamma (IFN-γ) were measured by specific enzyme-linked immunosorbent assays. The messenger RNA and protein levels of vitamin D receptor (VDR), vascular endothelial growth factor (VEGF), VEGF receptor 2 (VEGFR2), and hypoxia-inducible factor 1α (HIF-1α) were determined by real-time quantitative reverse transcription polymerase chain reaction and immunoblot analysis, respectively. RESULTS Treatment with vitamin D3 increased serum 25OHD and upregulated VDR in lung tissues with or without hyperoxia. In addition, treatment with vitamin D3 attenuated alveolar simplification, increased VEGF and VEGFR2, and protected alveolar simplification induced by hyperoxia. Furthermore, treatment with vitamin D3 resulted in a decrease of IL-1β and IFN-γ and an increase of HIF-1α in lung tissues under hyperoxia conditions. CONCLUSION Vitamin D exerts protective effects on hyperoxia-induced BPD in neonatal rats by regulating vitamin D-VDR signaling pathways.
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Affiliation(s)
- Yuchun Wang
- Department of Pediatrics, Hebei Medical University, Shijiazhuang, Hebei, China.,Department of Neonatology, Cangzhou Central Hospital, Cangzhou, Hebei, China
| | - Lian Jiang
- Department of Pediatrics, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
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Vitamin D: Current Challenges between the Laboratory and Clinical Practice. Nutrients 2021; 13:nu13061758. [PMID: 34064098 PMCID: PMC8224373 DOI: 10.3390/nu13061758] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/11/2021] [Accepted: 05/17/2021] [Indexed: 12/21/2022] Open
Abstract
Vitamin D is a micronutrient with pleiotropic effects in humans. Due to sedentary lifestyles and increasing time spent indoors, a growing body of research is revealing that vitamin D deficiency is a global problem. Despite the routine measurement of vitamin D in clinical laboratories and many years of efforts, methods of vitamin D analysis have yet to be standardized and are burdened with significant difficulties. This review summarizes several key analytical and clinical challenges that accompany the current methods for measuring vitamin D. According to an external quality assessment, methods and laboratories still produce a high degree of variability. Structurally similar metabolites are a source of significant interference. Furthermore, there is still no consensus on the normal values of vitamin D in a healthy population. These and other problems discussed herein can be a source of inconsistency in the results of research studies.
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Evaluation of Vitamin D Metabolism in Patients with Type 1 Diabetes Mellitus in the Setting of Cholecalciferol Treatment. Nutrients 2020; 12:nu12123873. [PMID: 33352890 PMCID: PMC7767242 DOI: 10.3390/nu12123873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [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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Mihevc M, Petreski T, Maver U, Bevc S. Renal proximal tubular epithelial cells: review of isolation, characterization, and culturing techniques. Mol Biol Rep 2020; 47:9865-9882. [PMID: 33170426 DOI: 10.1007/s11033-020-05977-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/03/2020] [Indexed: 12/23/2022]
Abstract
The kidney is a complex organ, comprised primarily of glomerular, tubular, mesangial, and endothelial cells, and podocytes. The fact that renal cells are terminally differentiated at 34 weeks of gestation is the main obstacle in regeneration and treatment of acute kidney injury or chronic kidney disease. Furthermore, the number of chronic kidney disease patients is ever increasing and with it the medical community should aim to improve existing and develop new methods of renal replacement therapy. On the other hand, as polypharmacy is on the rise, thought should be given into developing new ways of testing drug safety. A possible way to tackle these issues is with isolation and culture of renal cells. Several protocols are currently described to isolate the desired cells, of which the most isolated are the proximal tubular epithelial cells. They play a major role in water homeostasis, acid-base control, reabsorption of compounds, and secretion of xenobiotics and endogenous metabolites. When exposed to ischemic, toxic, septic, or obstructive conditions their death results in what we clinically perceive as acute kidney injury. Additionally, due to renal cells' limited regenerative potential, the profibrotic environment inevitably leads to chronic kidney disease. In this review we will focus on human proximal tubular epithelial cells. We will cover human kidney culture models, cell sources, isolation, culture, immortalization, and characterization subdivided into morphological, phenotypical, and functional characterization.
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Affiliation(s)
- Matic Mihevc
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska ulica 5, 2000, Maribor, Slovenia
| | - Tadej Petreski
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska ulica 5, 2000, Maribor, Slovenia
- Faculty of Medicine, Institute of Biomedical Sciences, University of Maribor, Taborska ulica 8, 2000, Maribor, Slovenia
| | - Uroš Maver
- Faculty of Medicine, Institute of Biomedical Sciences, University of Maribor, Taborska ulica 8, 2000, Maribor, Slovenia.
- Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000, Maribor, Slovenia.
| | - Sebastjan Bevc
- Department of Nephrology, Clinic for Internal Medicine, University Medical Centre Maribor, Ljubljanska ulica 5, 2000, Maribor, Slovenia.
- Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000, Maribor, Slovenia.
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21
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Kowalówka M, Główka AK, Karaźniewicz-Łada M, Kosewski G. Clinical Significance of Analysis of Vitamin D Status in Various Diseases. Nutrients 2020; 12:E2788. [PMID: 32933052 PMCID: PMC7551674 DOI: 10.3390/nu12092788] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/03/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022] Open
Abstract
Vitamin D plays a role not only in the proper functioning of the skeletal system and the calcium-phosphate equilibrium, but also in the immune system, the cardiovascular system and the growth and division of cells. Although numerous studies have reported on the analysis of vitamin D status in various groups of patients, the clinical significance of measurements of vitamin D forms and metabolites remains ambiguous. This article reviews the reports analyzing the status of vitamin D in various chronic states. Particular attention is given to factors affecting measurement of vitamin D forms and metabolites. Relevant papers published during recent years were identified by an extensive PubMed search using appropriate keywords. Measurement of vitamin D status proved to be a useful tool in diagnosis and progression of metabolic syndrome, neurological disorders and cancer. High performance liquid chromatography coupled with tandem mass spectrometry has become the preferred method for analyzing the various forms and metabolites of vitamin D in biological fluids. Factors influencing vitamin D concentration, including socio-demographic and biochemical factors as well as the genetic polymorphism of the vitamin D receptor, along with vitamin D transporters and enzymes participating in vitamin D metabolism should be considered as potential confounders of the interpretation of plasma total 25(OH)D concentrations.
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Affiliation(s)
- Magdalena Kowalówka
- Department of Bromatology, Poznan University of Medical Sciences, 42 Marcelińska Street, 60-354 Poznań, Poland; (M.K.); (A.K.G.); (G.K.)
| | - Anna K. Główka
- Department of Bromatology, Poznan University of Medical Sciences, 42 Marcelińska Street, 60-354 Poznań, Poland; (M.K.); (A.K.G.); (G.K.)
| | - Marta Karaźniewicz-Łada
- Department of Physical Pharmacy and Pharmacokinetics, Poznan University of Medical Sciences, 6 Święcickiego Street, 60-781 Poznań, Poland
| | - Grzegorz Kosewski
- Department of Bromatology, Poznan University of Medical Sciences, 42 Marcelińska Street, 60-354 Poznań, Poland; (M.K.); (A.K.G.); (G.K.)
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22
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Quantification of fat-soluble vitamins and their metabolites in biological matrices: an updated review. Bioanalysis 2020; 12:625-640. [DOI: 10.4155/bio-2020-0069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Fat-soluble vitamins (FSVs) are micronutrients essential in maintaining normal physiological function, metabolism and human growth. Ongoing increased awareness regarding FSV concentrations and their impact on human growth along with disease progression warrant the need of developing selective and sensitive analytical methods. LC–MS/MS is currently the method of choice for accurate quantitation of FSVs. However, there are multiple approaches for extraction, separation and calibration of FSVs in biological matrices. This review discusses recent LC–MS/MS methods for the simultaneous quantification of FSVs in biological matrices and summarizes sample pretreatment procedures, chromatographic conditions and calibration approaches. Current challenges and clinical applications in various disease states are also highlighted.
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23
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Liu Y, Chen X, Yuan S, Liu W, He L, Zhang Q. Quantification of Alfacalcidol Tablets Dissolution Content by Chemical Derivatization and LC-MS. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2020; 2020:6201656. [PMID: 32089948 PMCID: PMC7029283 DOI: 10.1155/2020/6201656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 01/08/2020] [Indexed: 06/10/2023]
Abstract
Application of liquid chromatography-mass spectrometry (LC-MS) in analyzing the content of alfacalcidol tablets dissolution faces big challenges due to the low amount of alfacalcidol in each tablet and the low ionization efficacy of the compound with electrospray ionization (ESI) or atmospheric-pressure chemical ionization (APCI). Here, extraction, derivatization, and LC-MS quantitation method have been developed and validated for measuring alfacalcidol tablets dissolution content. After alfacalcidol dissolution solution was extracted with dichloromethane to remove surfactant and inorganic salts, alfacalcidol was then derivatized via a Cookson reagent, 4-phenyl-1, 2, 4-triazoline-3, 5-dione (PTAD), under ambient conditions. Alfacalcidol derivative was successfully analyzed by LC-MS. Limit of detection (LOD) of the derivatized alfacalcidol was improved 100 times (0.01 μg/mL) compared with the nontreated compound (1 μg/mL). The new method was then validated following International Conference on Harmonization (ICH) guidance. The method shows a good linearity with r 2 > 0.99. Interday and intraday reproducibility was 3.3% and 7.9%, respectively. This procedure can be used in quantification of alfacalcidol tablets dissolution content and corresponding pharmaceutical quality control.
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Affiliation(s)
- Yang Liu
- National Institutes for Food and Drug Control, Beijing 102629, China
| | - Xi Chen
- National Institutes for Food and Drug Control, Beijing 102629, China
- YanTai University, Shandong 264005, China
| | - Song Yuan
- National Institutes for Food and Drug Control, Beijing 102629, China
| | - Wanhui Liu
- YanTai University, Shandong 264005, China
| | - Lan He
- National Institutes for Food and Drug Control, Beijing 102629, China
| | - Qingsheng Zhang
- National Institutes for Food and Drug Control, Beijing 102629, China
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Aljuffali I, Almarri F, Rahman AFMM, Alanazi FK, Alkholief M, Kazi M. Simultaneous Determination of Cholecalciferol and 25- Hydroxycholecalceferol in Lipid-based Self-nanoemulsifying formulations and Marketed Product Vi-de 3® by UHPLC-UV. CURR PHARM ANAL 2019. [DOI: 10.2174/1573412915666190612141228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The purpose of the current study was to develop a selective, precise, fast economical
and advanced reverse phase ultra-high-performance liquid chromatography (UHPLC UV)
method and validate it for the simultaneous estimation of cholecalciferol and its analogue 25-
hydroxycholecalciferol in lipid-based self-nano emulsifying formulation (SNEDDS).
Methods:
The chromatographic separation was simply performed on a Dionex® UHPLC systems
(Ultimate 3000, Thermo scientific) by using HSS C18 (2.1x50 mm, 1.8 µm) analytical column. The
elution was carried out isocratically with the mobile phase consisting of acetonitrile and methanol in the
ratio of 50:50 %v/v with a flow rate of 0.4 ml/min, followed by the UV detection at 265 nm. The injection
volume was 1µl and the column temperature was maintained at 45°C. FDA regulatory guidelines
were used to develop and validate the method.
Results:
The current developed UHPLC-UV method was found to be rapid (run time 2 min), and selective
with the high resolution of cholecalciferol and 25-hydroxycholecalciferol (RT=0.530 min & 1.360
min) from different lipid matrices. The method was highly sensitive (Limit of Detection and Lower
Limit of Quantification were 0.13 ppm & 0.51ppm, and 0.15 ppm & 0.54 ppm, respectively). The linearity,
accuracy and precision were determined as suitable over the concentration range of 0.5-50.0 ppm
for both the analytes.
Conclusion:
The proposed UHPLC-UV method can be used for the determination of cholecalciferol
and 25-hydroxycholecalciferol in SNEDDS and marketed Vi-De 3® as pure forms (intact) with no interference
of excipients or drug-related substances.
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Affiliation(s)
- Ibrahim Aljuffali
- Kayyali Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fahad Almarri
- Kayyali Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - A. F. M. Motiur Rahman
- Department of Pharmaceutical chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fars Kaed Alanazi
- Kayyali Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Musaed Alkholief
- Kayyali Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohsin Kazi
- Kayyali Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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25
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Martineau AR, Thummel KE, Wang Z, Jolliffe DA, Boucher BJ, Griffin SJ, Forouhi NG, Hitman GA. Differential Effects of Oral Boluses of Vitamin D2 vs Vitamin D3 on Vitamin D Metabolism: A Randomized Controlled Trial. J Clin Endocrinol Metab 2019; 104:5831-5839. [PMID: 31199458 PMCID: PMC6797055 DOI: 10.1210/jc.2019-00207] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 06/07/2019] [Indexed: 01/02/2023]
Abstract
CONTEXT Vitamin D2 and vitamin D3 have been hypothesized to exert differential effects on vitamin D metabolism. OBJECTIVE To compare the influence of administering vitamin D2 vs vitamin D3 on metabolism of vitamin D3. METHODS We measured baseline and 4-month serum concentrations of vitamin D3, 25-hydroxyvitamin D3 [25(OH)D3], 25-hydroxyvitamin D2, 24R,25-dihydroxyvitamin D3 [24R,25(OH)2D3], 1α,25-dihydroxyvitamin D3 [1α,25(OH)2D3], and 4β,25-dihydroxyvitamin D3 [4β,25(OH)2D3] in 52 adults randomized to receive a total of four oral bolus doses of 2.5 mg vitamin D2 (n = 28) or vitamin D3 (n = 24) over four months. Metabolite-to-parent compound ratios were calculated to estimate hydroxylase activity. Pairwise before vs after comparisons were made to evaluate effects of vitamin D2 and vitamin D3 on metabolism of vitamin D. Mean postsupplementation metabolite-to-parent ratios were then compared between groups. RESULTS Vitamin D2 was less effective than vitamin D3 in elevating total serum 25(OH)D concentration. Vitamin D2 suppressed mean four-month serum concentrations of 25(OH)D3, 24R,25(OH)2D3, 1α,25(OH)2D3, and 4β,25(OH)2D3 and mean ratios of 25(OH)D3 to D3 and 1α,25(OH)2D3 to 25(OH)D3, while increasing the mean ratio of 24R,25(OH)2D3 to 25(OH)D3. Vitamin D3 increased mean four-month serum concentrations of 25(OH)D3, 24R,25(OH)2D3, 1α,25(OH)2D3, and 4β,25(OH)2D3 and the mean ratio of 24R,25(OH)2D3 to 25(OH)D3. Participants receiving vitamin D2 had lower mean postsupplementation ratios of 25(OH)D3 to vitamin D3 and 1α,25(OH)2D3 to 25(OH)D3 than those receiving vitamin D3. Mean postsupplementation ratios of 24R,25(OH)2D3 to 25(OH)D3 and 4β,25(OH)2D3 to 25(OH)D3 did not differ between groups. CONCLUSIONS Bolus-dose vitamin D2 is less effective than bolus-dose vitamin D3 in elevating total serum 25(OH)D concentration. Administration of vitamin D2 reduces 25-hydroxylation of vitamin D3 and 1-α hydroxylation of 25(OH)D3, while increasing 24R-hydroxylation of 25(OH)D3.
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Affiliation(s)
- Adrian R Martineau
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
- Correspondence and Reprint Requests: Adrian R. Martineau, PhD, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, 58 Turner Street, London E1 2AB, United Kingdom. E-mail:
| | - Kenneth E Thummel
- Department of Pharmaceutics, University of Washington, Seattle, Washington
| | - Zhican Wang
- Department of Pharmaceutics, University of Washington, Seattle, Washington
| | - David A Jolliffe
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Barbara J Boucher
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Simon J Griffin
- Medical Research Council Epidemiology Unit, University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom
- Primary Care Unit, Department of Public Health and Primary Care, University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom
| | - Nita G Forouhi
- Medical Research Council Epidemiology Unit, University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom
| | - Graham A Hitman
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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26
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Mathew EM, Moorkoth S, Rane PD, Lewis L, Rao P. Cost-Effective HPLC-UV Method for Quantification of Vitamin D 2 and D 3 in Dried Blood Spot: A Potential Adjunct to Newborn Screening for Prophylaxis of Intractable Paediatric Seizures. Chem Pharm Bull (Tokyo) 2019; 67:88-95. [PMID: 30713278 DOI: 10.1248/cpb.c18-00542] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
25-Hydroxyvitamin D (25-(OH)D) deficiency is recently been described as one of the multiple factors responsible for pediatric seizures. 25-Hydroxyvitamin D3 and 25-Hydroxyvitamin D2 are the well-known markers to determine Vitamin D status. In this work we report the development of a sensitive and cost effective HPLC technique for the quantification of the vitamin D metabolites from dried blood spot samples (DBS). The metabolites were extracted using acetonitrile-methanol-0.1% formic acid (60 : 20 : 20 (v/v)) and analyzed on an Acclaim C18 column (150 × 4.6 mm i.d., 3 µm) at a flow rate of 1 mL/min. The method was linear in the range of 10-80 ng/mL. Limit of detection and limit of quantification (LOQ) of the method were 5 and 10 ng/mL respectively. Extensive stability studies demonstrated the analytes to be stable in stock and matrix with a percent change within the acceptable range of ±15%. Comparison of the newly developed HPLC-DBS method with the reported LC-MS-DBS and electrochemiluminescence immunoassay (ECLIA) methods followed by Bland-Altman analysis demonstrated a bias of 0.08 and -0.14, respectively proving the methods are comparable. Application of the developed method to a pediatric seizure cohort depicted 46.6% of cases as deficient and 26.6% as insufficient for 25-(OH)D. Among deficient cases 8 samples were below 10 ng/mL and exact amount was not calculated since these were below the LOQ levels. The mean ± standard deviation (S.D.) in the remaining 6 deficient cases was 13.22 ± 2.80 ng/mL. The levels in healthy infants were 33.9 ± 6.11 ng/mL. The method can be used routinely for assessing 25-(OH)D deficiency in newborn.
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Affiliation(s)
- Elizabeth Mary Mathew
- Department of Pharmaceutical Quality Assurance, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education
| | - Sudheer Moorkoth
- Department of Pharmaceutical Quality Assurance, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education
| | - Pankaj D Rane
- Department of Pharmaceutical Quality Assurance, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education
| | - Leslie Lewis
- Department of Paediatrics, Kasturba Medical College, Manipal Academy of Higher Education
| | - Pragna Rao
- Department of Biochemistry, Kasturba Medical College, Manipal Academy of Higher Education
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27
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Simple Fast Quantification of Cholecalciferol, 25-Hydroxyvitamin D and 1,25-Dihydroxyvitamin D in Adipose Tissue Using LC-HRMS/MS. Nutrients 2019; 11:nu11091977. [PMID: 31443425 PMCID: PMC6770531 DOI: 10.3390/nu11091977] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/16/2019] [Accepted: 08/17/2019] [Indexed: 12/31/2022] Open
Abstract
Vitamin D metabolism is actively modulated in adipose tissue during obesity. To better investigate this process, we develop a specific LC-HRMS/MS method that can simultaneously quantify three vitamin D metabolites, i.e., cholecalciferol, 25-hydroxyvitamin D3 (25(OH)D3), and 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) in a complex matrix, such as mouse adipose tissue and plasma. The method uses pretreatment with liquid–liquid or solid–phase extraction followed by derivatization using Amplifex® reagents to improve metabolite stability and ionization efficiency. Here, the method is optimized by co-eluting stable isotope-labelled internal standards to calibrate each analogue and to spike biological samples. Intra-day and inter-day relative standard deviations were 0.8–6.0% and 2.0–14.4%, respectively for the three derivatized metabolites. The limits of quantification (LoQ) achieved with Amplifex® derivatization were 0.02 ng/mL, 0.19 ng/mL, and 0.78 ng/mL for 1,25(OH)2D3, 25(OH)D3 and cholecalciferol, respectively. Now, for the first time, 1,25(OH)2D3 can be co-quantified with cholecalciferol and 25(OH)D3 in mouse adipose tissue. This validated method is successfully applied to study the impact of obesity on vitamin D status in mice.
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28
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Jenkinson C. The vitamin D metabolome: An update on analysis and function. Cell Biochem Funct 2019; 37:408-423. [PMID: 31328813 DOI: 10.1002/cbf.3421] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/03/2019] [Accepted: 06/05/2019] [Indexed: 01/08/2023]
Abstract
Current understanding of vitamin D tends to be focussed on the measurement of the major circulating form 25-hydroxyvitamin D3 (25OHD3) and its conversion to the active hormonal form, 1α,25-dihydroxyvitamin D3 (1α,25(OH)2 D3) via the enzyme 25-hydroxyvitamin D-1α-hydroxylase (CYP27B1). However, whilst these metabolites form the endocrine backbone of vitamin D physiology, it is important to recognise that there are other metabolic and catabolic pathways that are now recognised as being crucially important to vitamin D function. These pathways include C3-epimerization, CYP24A1 hydroxylase, CYP11A1 alternative metabolism of vitamin D3, and phase II metabolism. Endogenous metabolites beyond 25OHD3 are usually present at low endogenous levels and may only be functional in specific target tissues rather than in the general circulation. However, the technologies available to measure these metabolites have also improved, so that measurement of alternative vitamin D metabolic pathways may become more routine in the near future. The aim of this review is to provide a comprehensive overview of the various pathways of vitamin D metabolism, as well as describe the analytical techniques currently available to measure these vitamin D metabolites.
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Affiliation(s)
- Carl Jenkinson
- Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
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29
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Bonnet L, Hachemi MA, Karkeni E, Couturier C, Astier J, Defoort C, Svilar L, Martin JC, Tourniaire F, Landrier JF. Diet induced obesity modifies vitamin D metabolism and adipose tissue storage in mice. J Steroid Biochem Mol Biol 2019; 185:39-46. [PMID: 29990544 DOI: 10.1016/j.jsbmb.2018.07.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 05/25/2018] [Accepted: 07/07/2018] [Indexed: 10/28/2022]
Abstract
Low circulating levels of total and free 25-hydroxyvitamin D (25(OH)D) indicative of vitamin D status have been associated with obesity in humans. Moreover, obesity is thought to play a causal role in the reduction of 25(OH)D levels, and several theories have been put forward to explain this relationship. Here we tested the hypothesis that obesity disrupts vitamin D homeostasis in key organs of vitamin D metabolism. Male C57BL6 mice were fed for 7 or 11 weeks on either a control diet (control, 10% energy from fat) or a high-fat diet (HF, 60% energy from fat) formulated to provide equivalent vitamin D3 intake in both groups. After 7 weeks, there was a transient increase of total 25(OH)D together with a significant decrease of plasma vitamin D3 that could be related to the induction of hepatic genes involved in 25-hydroxylation. After 11 weeks, there was no change in total 25(OH)D but a significant decrease of free 25(OH)D and plasma vitamin D3 levels. We also quantified an increase of 25(OH)D in adipose tissue that was inversely correlated to the free 25(OH)D. Interestingly, this accumulation of 25(OH)D in adipose tissue was highly correlated to the induction of Cyp2r1, which could actively participate in vitamin D3 trapping and subsequent conversion to 25(OH)D in adipose tissue. Taken together, our data strongly suggest that the enzymes involved in vitamin D metabolism, notably in adipose tissue, are transcriptionally modified under high-fat diet, thus contributing to the obesity-related reduction of free 25(OH)D.
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Affiliation(s)
| | | | - Esma Karkeni
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France
| | | | - Julien Astier
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France
| | - Catherine Defoort
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France; CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Ljubica Svilar
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France; CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Jean-Charles Martin
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France; CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Franck Tourniaire
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France; CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Jean-François Landrier
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France; CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France.
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30
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Sakolish C, Weber EJ, Kelly EJ, Himmelfarb J, Mouneimne R, Grimm FA, House JS, Wade T, Han A, Chiu WA, Rusyn I. Technology Transfer of the Microphysiological Systems: A Case Study of the Human Proximal Tubule Tissue Chip. Sci Rep 2018; 8:14882. [PMID: 30291268 PMCID: PMC6173737 DOI: 10.1038/s41598-018-33099-2] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/21/2018] [Indexed: 01/08/2023] Open
Abstract
The adoption of a new technology into basic research, and industrial and clinical settings requires rigorous testing to build confidence in the reproducibility, reliability, robustness, and relevance of these models. Tissue chips are promising new technology, they have the potential to serve as a valuable tool in biomedical research, as well as pharmaceutical development with regards to testing for efficacy and safety. The principal goals of this study were to validate a previously established proximal tubule tissue chip model in an independent laboratory and to extend its utility to testing of nephrotoxic compounds. Here, we evaluated critical endpoints from the tissue chip developer laboratory, focusing on biological relevance (long-term viability, baseline protein and gene expression, ammoniagenesis, and vitamin D metabolism), and toxicity biomarkers. Tissue chip experiments were conducted in parallel with traditional 2D culture conditions using two different renal proximal tubule epithelial cell sources. The results of these studies were then compared to the findings reported by the tissue chip developers. While the overall transferability of this advanced tissue chip platform was a success, the reproducibility with the original report was greatly dependent on the cell source. This study demonstrates critical importance of developing microphysiological platforms using renewable cell sources.
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Affiliation(s)
- Courtney Sakolish
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
| | - Elijah J Weber
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Edward J Kelly
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Jonathan Himmelfarb
- Division of Nephrology, University of Washington Kidney Research Institute, Seattle, WA, USA
| | - Roula Mouneimne
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
| | - Fabian A Grimm
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
| | - John S House
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC, USA
| | - Terry Wade
- Geochemical and Environmental Research Group, Texas A&M University, College Station, TX, USA
| | - Arum Han
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Weihsueh A Chiu
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
| | - Ivan Rusyn
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA.
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Margier M, Collet X, le May C, Desmarchelier C, André F, Lebrun C, Defoort C, Bluteau A, Borel P, Lespine A, Reboul E. ABCB1 (P-glycoprotein) regulates vitamin D absorption and contributes to its transintestinal efflux. FASEB J 2018; 33:2084-2094. [PMID: 30222077 DOI: 10.1096/fj.201800956r] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Efficient intestinal absorption of dietary vitamin D is required in most people to ensure an adequate status. Thus, we investigated the involvement of ATP binding cassette subfamily B member 1 (ABCB1) in vitamin D intestinal efflux. Both cholecalciferol (D3) and 25-hydroxycholecalciferol [25(OH)D3] apical effluxes were decreased by chemical inhibition of ABCB1 in Caco-2 cells and increased by ABCB1 overexpression in Griptites or Madin-Darby canine kidney type II cells. Mice deficient for the 2 murine ABCB1s encoded by Abcb1a and Abcb1b genes ( Abcb1-/-) displayed an accumulation of 25(OH)D3 in plasma, intestine, brain, liver, and kidneys, together with an increased D3 postprandial response after gavage compared with controls. 25(OH)D3 efflux through Abcb1-/- intestinal explants was markedly decreased compared with controls. This reduction of 25(OH)D3 transfer from plasma to lumen was further confirmed in vivo in intestine-perfused mice. Docking experiments established that both D3 and 25(OH)D3 could bind with high affinity to Caenorhabditis elegans P-glycoprotein, used as an ABCB1 model. Finally, in a group of 39 healthy male adults, a single-nucleotide polymorphism (SNP) in ABCB1 (rs17064) was significantly associated with the fasting plasma 25(OH)D3 concentration. Thus, we showed here for the first time that ABCB1 is involved in neo-absorbed vitamin D efflux by the enterocytes and that it also contributes to vitamin D transintestinal excretion and likely impacts vitamin D status.-Margier, M., Collet, X., le May, C., Desmarchelier, C., André, F., Lebrun, C., Defoort, C., Bluteau, A., Borel, P., Lespine, A., Reboul, E. ABCB1 (P-glycoprotein) regulates vitamin D absorption and contributes to its transintestinal efflux.
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Affiliation(s)
- Marielle Margier
- Aix Marseille Université, INSERM, Institut National de la Recherche Agronomique (INRA), Centre de Recherche on Cardiovasculaire et Nutrition (C2VN), Marseille, France
| | - Xavier Collet
- INSERM, Unité Mixte de Recherche (UMR) 1048, Institute of Metabolic and Cardiovascular Diseases (I2MC), Université de Toulouse III, Toulouse, France
| | - Cédric le May
- Institut du Thorax, INSERM, Centre National de la Recherche Scientifique (CNRS), Université de Nantes, Nantes, France
| | - Charles Desmarchelier
- Aix Marseille Université, INSERM, Institut National de la Recherche Agronomique (INRA), Centre de Recherche on Cardiovasculaire et Nutrition (C2VN), Marseille, France
| | - François André
- Institut de Biologie Intégrative de la Cellule (I2BC), Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 9198, Commissariat à l'Energie Atomique et aux Energies Alternatives/Institut de Biologie Frédéric Joliot, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Chantal Lebrun
- Innovations Thérapeutiques et Résistances (InTheRes), UMR 1436, Université de Toulouse, INRA, École Nationale Vétérinaire de Toulouse (ENVT), Toulouse, France
| | - Catherine Defoort
- Aix Marseille Université, INSERM, Institut National de la Recherche Agronomique (INRA), Centre de Recherche on Cardiovasculaire et Nutrition (C2VN), Marseille, France.,Criblage Biologique Marseille (CriBioM), Faculté de Médecine de la Timone, Marseille, France
| | - Alice Bluteau
- Innovations Thérapeutiques et Résistances (InTheRes), UMR 1436, Université de Toulouse, INRA, École Nationale Vétérinaire de Toulouse (ENVT), Toulouse, France
| | - Patrick Borel
- Aix Marseille Université, INSERM, Institut National de la Recherche Agronomique (INRA), Centre de Recherche on Cardiovasculaire et Nutrition (C2VN), Marseille, France
| | - Anne Lespine
- Innovations Thérapeutiques et Résistances (InTheRes), UMR 1436, Université de Toulouse, INRA, École Nationale Vétérinaire de Toulouse (ENVT), Toulouse, France
| | - Emmanuelle Reboul
- Aix Marseille Université, INSERM, Institut National de la Recherche Agronomique (INRA), Centre de Recherche on Cardiovasculaire et Nutrition (C2VN), Marseille, France
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Chapron BD, Chapron A, Phillips B, Okoli MC, Shen DD, Kelly EJ, Himmelfarb J, Thummel KE. Reevaluating the role of megalin in renal vitamin D homeostasis using a human cell-derived microphysiological system. ALTEX-ALTERNATIVES TO ANIMAL EXPERIMENTATION 2018; 35:504-515. [PMID: 29999169 PMCID: PMC6896899 DOI: 10.14573/altex.1803161] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/29/2018] [Indexed: 01/08/2023]
Abstract
The role of megalin in the regulation of renal vitamin D homeostasis has previously been evaluated in megalin-knockout mice and rat proximal tubule epithelial cells. We revisited these hypotheses that were previously tested solely in rodent models, this time using a 3-dimensional proximal tubule microphysiological system incorporating primary human proximal tubule epithelial cells. Using this human cell-derived model, we confirmed that 25OHD3 is transported into the human proximal tubule epithelium via megalin-mediated endocytosis while bound to vitamin D binding protein. Building upon these findings, we then evaluated the role of megalin in modulating the cellular uptake and biological activity of 1α,25(OH)2D3. Inhibition of megalin function decreased the 1α,25(OH)2D3-mediated induction of both cytochrome P450 24A1 protein levels and 24-hydroxylation activity following perfusion with vitamin D binding protein and 1α,25(OH)2D3. The potential for reciprocal effects from 1α,25(OH)2D3 on megalin expression were also tested. Contrary to previously published observations from rat proximal tubule epithelial cells, 1α,25(OH)2D3 did not induce megalin gene expression, thus highlighting the potential for meaningful interspecies differences in the homeostatic regulation of megalin in rodents and humans. These findings challenge a recently promoted hypothesis, predicated on the rodent cell data, that attempts to connect 1α,25(OH)2D3-mediated regulation of renal megalin expression and the pathology of chronic kidney disease in humans. In addition to providing specific insights related to the importance of renal megalin in vitamin D homeostasis, these results constitute a proof-of-concept that human-derived microphysiological systems are a suitable replacement for animal models for quantitative pharmacology and physiology research.
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Affiliation(s)
- Brian D Chapron
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Alenka Chapron
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Brian Phillips
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Miracle C Okoli
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Danny D Shen
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Edward J Kelly
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | | | - Kenneth E Thummel
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
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Roizen JD, Li D, O’Lear L, Javaid MK, Shaw NJ, Ebeling PR, Nguyen HH, Rodda CP, Thummel KE, Thacher TD, Hakonarson H, Levine MA. CYP3A4 mutation causes vitamin D-dependent rickets type 3. J Clin Invest 2018; 128:1913-1918. [PMID: 29461981 PMCID: PMC5919884 DOI: 10.1172/jci98680] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 02/13/2018] [Indexed: 01/08/2023] Open
Abstract
Genetic forms of vitamin D-dependent rickets (VDDRs) are due to mutations impairing activation of vitamin D or decreasing vitamin D receptor responsiveness. Here we describe two unrelated patients with early-onset rickets, reduced serum levels of the vitamin D metabolites 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D, and deficient responsiveness to parent and activated forms of vitamin D. Neither patient had a mutation in any genes known to cause VDDR; however, using whole exome sequencing analysis, we identified a recurrent de novo missense mutation, c.902T>C (p.I301T), in CYP3A4 in both subjects that alters the conformation of substrate recognition site 4 (SRS-4). In vitro, the mutant CYP3A4 oxidized 1,25-dihydroxyvitamin D with 10-fold greater activity than WT CYP3A4 and 2-fold greater activity than CYP24A1, the principal inactivator of vitamin D metabolites. As CYP3A4 mutations have not previously been linked to rickets, these findings provide insight into vitamin D metabolism and demonstrate that accelerated inactivation of vitamin D metabolites represents a mechanism for vitamin D deficiency.
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Affiliation(s)
| | - Dong Li
- Center for Applied Genomics, The Children’s Hospital of Philadelphia (CHOP), University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | | | - Muhammad K. Javaid
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Nicholas J. Shaw
- Department of Endocrinology and Diabetes, Birmingham Children’s Hospital and Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, United Kingdom
| | - Peter R. Ebeling
- Department of Medicine, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
| | - Hanh H. Nguyen
- Department of Medicine, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
| | - Christine P. Rodda
- Australian Institute for Musculoskeletal Science, Sunshine Hospital, and Department of Paediatrics, University of Melbourne,Parkville, Victoria, Australia
| | - Kenneth E. Thummel
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Tom D. Thacher
- Department of Family Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Hakon Hakonarson
- Center for Applied Genomics, The Children’s Hospital of Philadelphia (CHOP), University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
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The When, What & How of Measuring Vitamin D Metabolism in Clinical Medicine. Nutrients 2018; 10:nu10040482. [PMID: 29652819 PMCID: PMC5946267 DOI: 10.3390/nu10040482] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/03/2018] [Accepted: 04/11/2018] [Indexed: 12/18/2022] Open
Abstract
We now have the ability to measure a number of different vitamin D metabolites with very accurate methods. The most abundant vitamin D metabolite, 25-hydroxyvitamin D, is currently the best marker for overall vitamin D status and is therefore most commonly measured in clinical medicine. The added value of measuring metabolites beyond 25-hydroxyvitamin D, like 1,25-, and 24,25-dihydroxyvitamin D is not broadly appreciated. Yet, in some more complicated cases, these metabolites may provide just the information needed for a legitimate diagnosis. The problem at present, is knowing when to measure, what to measure and how to measure. For 25-hydroxyvitamin D, the most frequently used automated immunoassays do not meet the requirements of today’s standards for certain patient groups and liquid chromatography-tandem mass spectrometry is the desired method of choice in these individuals. The less frequently measured 1,25-dihydroxyvitamin D metabolite enables us to identify a number of conditions, including 1α-hydroxylase deficiency, hereditary vitamin D-resistant rickets and a number of granulomatous diseases or lymphoproliferative diseases accompanied by hypercalcaemia. Furthermore, it discriminates between the FGF23-mediated and non-FGF23-mediated hypophosphatemic syndromes. The 24,25-dihydroxyvitamin D metabolite has proven its value in the diagnosis of idiopathic infantile hypercalcaemia and has the potential of having value in identifying other diseases. For both metabolites, the understanding of the origin of differences between assays is limited and requires further attention. Nonetheless, in every way, appropriate measurement of vitamin D metabolism in the clinical laboratory hinges eminently on the comprehension of the value of the different metabolites, and the importance of the choice of method.
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Abstract
The number of requests for vitamin D metabolite measurements has increased dramatically over the past decade leading commercial laboratories to develop rapid high throughput assays. The measurement of 25-hydroxyvitamin D (25[OH]D) and to a lesser extent 1,25-dihydroxyvitamin D (1,25[OH]2D) dominates these requests, but requests for multiple metabolite measurements in the same sample are also increasing. The most commonly used methods include immunoassays and liquid chromatography/mass spectrometry (LC-MS). Each method has its advantages and disadvantages, but with improvements in technology, especially in LC-MS, this method is gaining ascendance due to its greater precision and flexibility. The use of standards from the National Institutes of Standards and Technology has substantially reduced the variability from laboratory to laboratory, thereby improving the reliability of these measurements. Although the current demand is for measurement of total vitamin D metabolite levels, these metabolites circulate in blood tightly bound to vitamin D binding protein (DBP) and albumin with less than 1% free. The free concentration may be a more accurate indicator of vitamin D status especially in individuals with DBP levels that deviate from the normal population. Thus, methods to measure the free concentration at least of 25(OH)D are becoming available and may supplement if not replace measurements of total levels.
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Bonnet L, Karkeni E, Couturier C, Astier J, Dalifard J, Defoort C, Svilar L, Martin JC, Tourniaire F, Landrier JF. Gene Expression Pattern in Response to Cholecalciferol Supplementation Highlights Cubilin as a Major Protein of 25(OH)D Uptake in Adipocytes and Male Mice White Adipose Tissue. Endocrinology 2018; 159:957-966. [PMID: 29186386 DOI: 10.1210/en.2017-00650] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 11/21/2017] [Indexed: 12/22/2022]
Abstract
It is well established that the active form of vitamin D (i.e., 1,25-dihydroxyvitamin D [1,25(OH)2D]) regulates the expression of genes involved in its own metabolism and transport in the kidney and possibly in the liver. However, little is known about the transcriptional impact of cholecalciferol supplementation on white adipose tissue (WAT) and adipocytes, which are a major site of vitamin D and 25-hydroxyvitamin D [25(OH)D] storage in the organism. To fill this gap, we investigated the impact of cholecalciferol supplementation in WAT via a panel of genes coding for enzymes and proteins involved in vitamin D metabolism and uptake. Mice supplemented with cholecalciferol (15,000 IU/kg of body weight per day) for 4 days showed decreased messenger RNA (mRNA) levels of proteins involved in cholecalciferol metabolism (Cyp24a1, Cyp27a1) and decreased cubilin mRNA levels in WAT. These data were partly confirmed in 3T3-L1 adipocytes incubated with 1,25(OH)2D. The downregulation of cubilin mRNA observed in WAT and in 3T3-L1 was confirmed at the protein level in WAT and at the mRNA level in human primary adipocytes. Vitamin D receptor (VDR) agonist (EB1089) and RNA interference approaches demonstrated that VDR was involved in this regulation. Furthermore, chemical inhibitor and RNA inference analysis demonstrated that cubilin was involved in 25(OH)D uptake by adipocytes. This study established an overall snapshot of the genes regulated by cholecalciferol in mouse WAT and cell-autonomously in adipocytes. We highlighted that the regulation of cubilin expression was mediated by a VDR-dependent mechanism, and we demonstrated that cubilin was involved in 25(OH)D uptake by adipocytes.
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Affiliation(s)
- Lauriane Bonnet
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
| | - Esma Karkeni
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
| | | | - Julien Astier
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
| | - Julie Dalifard
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
| | - Catherine Defoort
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
- CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Ljubica Svilar
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
- CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Jean-Charles Martin
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
- CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Franck Tourniaire
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
- CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
| | - Jean-François Landrier
- NORT, Aix-Marseille Université, INRA, INSERM, Marseille, France
- CriBioM, Criblage Biologique Marseille, Faculté de Médecine de la Timone, Marseille, France
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Weber EJ, Chapron A, Chapron BD, Voellinger JL, Lidberg KA, Yeung CK, Wang Z, Yamaura Y, Hailey DW, Neumann T, Shen DD, Thummel KE, Muczynski KA, Himmelfarb J, Kelly EJ. Development of a microphysiological model of human kidney proximal tubule function. Kidney Int 2017; 90:627-37. [PMID: 27521113 DOI: 10.1016/j.kint.2016.06.011] [Citation(s) in RCA: 158] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 05/31/2016] [Accepted: 06/02/2016] [Indexed: 12/20/2022]
Abstract
The kidney proximal tubule is the primary site in the nephron for excretion of waste products through a combination of active uptake and secretory processes and is also a primary target of drug-induced nephrotoxicity. Here, we describe the development and functional characterization of a 3-dimensional flow-directed human kidney proximal tubule microphysiological system. The system replicates the polarity of the proximal tubule, expresses appropriate marker proteins, exhibits biochemical and synthetic activities, as well as secretory and reabsorptive processes associated with proximal tubule function in vivo. This microphysiological system can serve as an ideal platform for ex vivo modeling of renal drug clearance and drug-induced nephrotoxicity. Additionally, this novel system can be used for preclinical screening of new chemical compounds prior to initiating human clinical trials.
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Affiliation(s)
- Elijah J Weber
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Alenka Chapron
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Brian D Chapron
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Jenna L Voellinger
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Kevin A Lidberg
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Catherine K Yeung
- Department of Pharmacy, University of Washington, Seattle, Washington, USA; Kidney Research Institute, University of Washington, Seattle, Washington, USA
| | - Zhican Wang
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Yoshiyuki Yamaura
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | - Dale W Hailey
- Department of Biological Structure, University of Washington, Seattle, Washington, USA
| | | | - Danny D Shen
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA; Department of Pharmacy, University of Washington, Seattle, Washington, USA
| | - Kenneth E Thummel
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA
| | | | - Jonathan Himmelfarb
- Department of Medicine, University of Washington, Seattle, Washington, USA; Kidney Research Institute, University of Washington, Seattle, Washington, USA.
| | - Edward J Kelly
- Department of Pharmaceutics, University of Washington, Seattle, Washington, USA.
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Pauwels S, Jans I, Billen J, Heijboer A, Verstuyf A, Carmeliet G, Mathieu C, Maestro M, Waelkens E, Evenepoel P, Bouillon R, Vanderschueren D, Vermeersch P. 1β,25-Dihydroxyvitamin D 3: A new vitamin D metabolite in human serum. J Steroid Biochem Mol Biol 2017; 173:341-348. [PMID: 28193495 DOI: 10.1016/j.jsbmb.2017.02.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 02/03/2017] [Accepted: 02/08/2017] [Indexed: 01/08/2023]
Abstract
BACKGROUND The measurement of 1α,25(OH)2D3 in human serum poses a true challenge as concentrations are very low and structurally similar metabolites can interfere. MATERIALS AND METHODS During optimization of our in-house LC-MSMS method for serum 1α,25(OH)2D3 a previously co-eluting isobaric interference was separated. The isobar was identified as 1β,25(OH)2D3 by comparing retention time and fragmentation spectra to standards (other isobaric dihydroxylated vitamin D3 analogs). 1β,25(OH)2D3 showed specific cluster formation (water), not present in 1α,25(OH)2D3. 1β,25(OH)2D3 was measured in serum of apparently healthy human volunteers (n=20), patients with high serum 25-hydroxyvitamin D [25(OH)D] concentrations (>50ng/mL) (n=33 among which 4 with very high levels (>150ng/mL)) and patients with kidney failure (n=68; 39 stage 1-3, 29 stage 4-5). Pearson's r was calculated for correlations and Mann-Whitney statistic to compare group medians. RESULTS Median serum 1β,25(OH)2D3 was 11pg/mL in apparently healthy volunteers and increased to 20pg/mL for serum 25(OH)D concentrations above 80ng/mL (n=22) (p<0.0001). 1β,25(OH)2D3 concentrations were significantly correlated to serum 25(OH)D concentrations (r=0.85) for the combined results from healthy volunteers and patient sera (n=53) (p<0.0001). For patients with kidney failure, median serum 1β,25(OH)2D3 was 7pg/mL and not different from the median level in healthy volunteers (p=0.06). The median concentration did not vary with different stages. CONCLUSIONS We present evidence for the widespread presence of 1β,25(OH)2D3, a new vitamin D metabolite, in human serum. The level increases with rising serum 25(OH)D concentrations and is particularly high in patients with very high 25(OH)D levels. We previously demonstrated that 1β,25(OH)2D3 is a poor genomic agonist but a potent non-genomic antagonist of 1α,25(OH)2D3. The clinical implications of the presence of this analog therefore require further exploration.
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Affiliation(s)
- Steven Pauwels
- Department of Laboratory Medicine, University Hospitals Leuven, 3000 Leuven, Belgium; Department of Cardiovascular Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Ivo Jans
- Department of Laboratory Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Jaak Billen
- Department of Laboratory Medicine, University Hospitals Leuven, 3000 Leuven, Belgium; Laboratory of Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Annemieke Heijboer
- Endocrine Laboratory, Department of Clinical Chemistry, VU University medical center, Amsterdam, the Netherlands
| | - Annemieke Verstuyf
- Laboratory of Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Geert Carmeliet
- Laboratory of Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Chantal Mathieu
- Laboratory of Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Miguel Maestro
- Department of Fundamental Chemistry, University of A Coruña, A Coruña, Spain
| | - Etienne Waelkens
- Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Pieter Evenepoel
- Department of Immunology and Microbiology, Laboratory of Nephrology, KU Leuven, 3000 Leuven, Belgium
| | - Roger Bouillon
- Laboratory of Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium.
| | - Dirk Vanderschueren
- Department of Laboratory Medicine, University Hospitals Leuven, 3000 Leuven, Belgium; Laboratory of Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Pieter Vermeersch
- Department of Laboratory Medicine, University Hospitals Leuven, 3000 Leuven, Belgium; Department of Cardiovascular Sciences, KU Leuven, 3000 Leuven, Belgium
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Gao C, Bergagnini-Kolev MC, Liao MZ, Wang Z, Wong T, Calamia JC, Lin YS, Mao Q, Thummel KE. Simultaneous quantification of 25-hydroxyvitamin D 3-3-sulfate and 25-hydroxyvitamin D 3-3-glucuronide in human serum and plasma using liquid chromatography-tandem mass spectrometry coupled with DAPTAD-derivatization. J Chromatogr B Analyt Technol Biomed Life Sci 2017. [PMID: 28622619 DOI: 10.1016/j.jchromb.2017.06.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
25-hydroxyvitamin D3-3-sulfate (25-OHD3-S) and 25-hydroxyvitamin D3-3-glucuronide (25-OHD3-G) are major conjugative metabolites of vitamin D3 found in the systemic circulation and potentially important reservoirs for 25-hydroxyvitamin D3. Simultaneous and accurate quantification of these metabolites could advance assessment of the impact of vitamin D3 on health and disease. In this study, a highly sensitive and accurate liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed and validated for simultaneous quantification of 25-OHD3-S and 25-OHD3-G in human serum or plasma. Following protein precipitation, the analytes of interest were partially purified by solid-phase extraction and subjected to derivatization with 4-(4'-dimethylaminophenyl)-1,2,4-triazoline-3,5-dione (DAPTAD). Quantification of the analytes was based on multiple reaction monitoring (MRM) operated in the positive ion mode, and deuterated internal standards were used for each conjugative metabolite. Applying this method to the analysis of 25-OHD3-S and 25-OHD3-G concentrations in human serum or plasma samples achieved satisfactory reproducibility, accuracy and sensitivity. We subsequently used this method to simultaneously determine serum concentrations of the two metabolites in archived samples from a rifampin treatment study. Drug treatment had no effect on metabolite concentrations, but significantly increased the 25-OHD3-S/25-OHD3 concentration ratio (p=0.01). The availability of this new method should improve sample throughput and our ability to quantify and monitor circulating 25-OHD3-S and 25-OHD3-G concentrations.
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Affiliation(s)
- Chunying Gao
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | | | - Michael Z Liao
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Zhican Wang
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Timothy Wong
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Justina C Calamia
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Yvonne S Lin
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Qingcheng Mao
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Kenneth E Thummel
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA.
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40
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Hawkes CP, Li D, Hakonarson H, Meyers KE, Thummel KE, Levine MA. CYP3A4 Induction by Rifampin: An Alternative Pathway for Vitamin D Inactivation in Patients With CYP24A1 Mutations. J Clin Endocrinol Metab 2017; 102:1440-1446. [PMID: 28324001 PMCID: PMC5443336 DOI: 10.1210/jc.2016-4048] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 02/28/2017] [Indexed: 11/19/2022]
Abstract
Context The P450 enzyme CYP24A1 is the principal inactivator of vitamin D metabolites. Biallelic loss-of-function mutations in CYP24A1 are associated with elevated serum levels of 1,25-dihydroxyvitamin D3 with consequent hypercalcemia and hypercalciuria and represent the most common form of idiopathic infantile hypercalcemia (IIH). Current management strategies for this condition include a low-calcium diet, reduced dietary vitamin D intake, and limited sunlight exposure. CYP3A4 is a P450 enzyme that inactivates many drugs and xenobiotics and may represent an alternative pathway for inactivation of vitamin D metabolites. Objective Our goal was to determine if rifampin, a potent inducer of CYP3A4, can normalize mineral metabolism in patients with IIH due to mutations in CYP24A1. Methods We treated two patients with IIH with daily rifampin (10 mg/kg/d, up to a maximum of 600 mg). Serum calcium, phosphorus, parathyroid hormone (PTH), liver, and adrenal function and vitamin D metabolites, as well as urinary calcium excretion, were monitored during treatment of up to 13 months. Results Prior to treatment, both patients had hypercalcemia, hypercalciuria, and nephrocalcinosis with elevated serum 1,25-dihydroxyvitamin D3 and suppressed serum PTH. Daily treatment with rifampin was well tolerated and led to normalization or improvement in all clinical and biochemical parameters. Conclusion These observations suggest that rifampin-induced overexpression of CYP3A4 provides an alternative pathway for inactivation of vitamin D metabolites in patients who lack CYP24A1 function.
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MESH Headings
- Adolescent
- Calcitriol/blood
- Calcium/blood
- Calcium/urine
- Child
- Cytochrome P-450 CYP3A Inducers/therapeutic use
- Female
- Humans
- Hypercalcemia/blood
- Hypercalcemia/complications
- Hypercalcemia/drug therapy
- Hypercalcemia/genetics
- Hypercalciuria/etiology
- Infant, Newborn, Diseases/blood
- Infant, Newborn, Diseases/drug therapy
- Infant, Newborn, Diseases/genetics
- Male
- Metabolism, Inborn Errors/blood
- Metabolism, Inborn Errors/complications
- Metabolism, Inborn Errors/drug therapy
- Metabolism, Inborn Errors/genetics
- Mutation
- Nephrocalcinosis/etiology
- Parathyroid Hormone/blood
- Phosphorus/blood
- Rifampin/therapeutic use
- Treatment Outcome
- Vitamin D/blood
- Vitamin D3 24-Hydroxylase/genetics
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Affiliation(s)
- Colin Patrick Hawkes
- Division of Endocrinology and Diabetes, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania 19104
- National Children’s Research Centre, Crumlin, Dublin, D12 V004, Ireland
| | - Dong Li
- Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania 19104
| | - Hakon Hakonarson
- Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania 19104
| | - Kevin E. Meyers
- Division of Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania 19104
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Kenneth E. Thummel
- Department of Pharmaceutics, University of Washington School of Pharmacy, Seattle, Washington 98155
| | - Michael A. Levine
- Division of Endocrinology and Diabetes, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania 19104
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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41
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Herrmann M, Farrell CJL, Pusceddu I, Fabregat-Cabello N, Cavalier E. Assessment of vitamin D status – a changing landscape. ACTA ACUST UNITED AC 2017; 55:3-26. [DOI: 10.1515/cclm-2016-0264] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 05/30/2016] [Indexed: 01/14/2023]
Abstract
Abstract
In recent years it has been shown that vitamin D deficiency is associated with an increased incidence as well as the progression of a broad range of diseases including osteoporosis, rickets, cardiovascular disease, autoimmune disease, multiple sclerosis and cancer. Consequently, requests for the assessment of vitamin D status have increased dramatically. Despite significant progress in the analysis of vitamin D metabolites and an expansion of our pathophysiological knowledge of vitamin D, the assessment of vitamin D status remains a challenging and partially unresolved issue. Current guidelines from scientific bodies recommend the measurement of 25-hydroxy vitamin D (25-OHD) in blood as the preferred test. However, growing evidence indicates significant limitations of this test, including analytical aspects and interpretation of results. In addition, the relationships between 25-OHD and various clinical indices, such as bone mineral density and fracture risk, are rather weak and not consistent across races. Recent studies have systematically investigated new markers of vitamin D status including the vitamin D metabolite ratio (VMR) (ratio between 25-OHD and 24,25-dihydroxy vitamin D), bioavailable 25-OHD [25-OHD not bound to vitamin D binding protein (DBP)], and free 25-OHD [circulating 25-OHD bound to neither DBP nor albumin (ALB)]. These parameters may potentially change how we will assess vitamin D status in the future. Although these new biomarkers have expanded our knowledge about vitamin D metabolism, a range of unresolved issues regarding their measurement and the interpretation of results prevent their use in daily practice. It can be expected that some of these issues will be overcome in the near future so that they may be considered for routine use (at least in specialized centers). In addition, genetic studies have revealed several polymorphisms in key proteins of vitamin D metabolism that affect the circulating concentrations of vitamin D metabolites. The affected proteins include DBP, 7-dehydrocholesterol synthase and the vitamin D receptor (VDR). Here we aim to review existing knowledge regarding the biochemistry, physiology and measurement of vitamin D. We will also provide an overview of current and emerging biomarkers for the assessment of vitamin D status, with particular attention methodological aspects and their usefulness in clinical practice.
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Higashi T, Ogawa S. Chemical derivatization for enhancing sensitivity during LC/ESI-MS/MS quantification of steroids in biological samples: a review. J Steroid Biochem Mol Biol 2016; 162:57-69. [PMID: 26454158 DOI: 10.1016/j.jsbmb.2015.10.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/29/2015] [Accepted: 10/02/2015] [Indexed: 01/22/2023]
Abstract
Sensitive and specific methods for the detection, characterization and quantification of endogenous steroids in body fluids or tissues are necessary for the diagnosis, pathological analysis and treatment of many diseases. Recently, liquid chromatography/electrospray ionization-tandem mass spectrometry (LC/ESI-MS/MS) has been widely used for these purposes due to its specificity and versatility. However, the ESI efficiency and fragmentation behavior of some steroids are poor, which lead to a low sensitivity. Chemical derivatization is one of the most effective methods to improve the detection characteristics of steroids in ESI-MS/MS. Based on this background, this article reviews the recent advances in chemical derivatization for the trace quantification of steroids in biological samples by LC/ESI-MS/MS. The derivatization in ESI-MS/MS is based on tagging a proton-affinitive or permanently charged moiety on the target steroid. Introduction/formation of a fragmentable moiety suitable for the selected reaction monitoring by the derivatization also enhances the sensitivity. The stable isotope-coded derivatization procedures for the steroid analysis are also described.
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Affiliation(s)
- Tatsuya Higashi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan.
| | - Shoujiro Ogawa
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
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Andersen LB, Golic M, Przybyl L, Sorensen GL, Jørgensen JS, Fruekilde P, von Versen-Höynck F, Herse F, Højskov CS, Dechend R, Christesen HT, Haase N. Vitamin D depletion does not affect key aspects of the preeclamptic phenotype in a transgenic rodent model for preeclampsia. ACTA ACUST UNITED AC 2016; 10:597-607.e1. [PMID: 27450577 DOI: 10.1016/j.jash.2016.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 05/19/2016] [Accepted: 05/24/2016] [Indexed: 02/02/2023]
Abstract
Maternal vitamin D deficiency is proposed as a risk factor for preeclampsia in humans. We tested the hypothesis that vitamin D depletion aggravates and high supplementation ameliorates the preeclampsia phenotype in an established transgenic rat model of human renin-angiotensin system-mediated preeclampsia. Adult rat dams, transgenic for human angiotensinogen (hAGT) and mated with male rats transgenic for human renin (hREN), were fed either vitamin D-depleted chow (VDd) or enriched chow (VDh) 2 weeks before mating and during pregnancy. Mean blood pressure was recorded by tail-cuff, and 24-hour urine samples were collected in metabolic cages at days 6 and 18 of gestation. Rats were sacrificed at day 21 of gestation. Depleted dams (VDd) had negligible serum 25-hydroxyvitamin D2+3 levels (mean ± SEM; 2.95 ± 0.45 nmol/l vs. VDh 26.20 ± 2.88 nmol/l, P = .01), but in both groups, levels of 1,25(OH)2D3 remained below detection level of 25 pmol/l. Dietary vitamin D depletion did not aggravate hypertension (mean ± SEM BP, day 20 of gestation: 151.38 ± 5.65 mmHg VDd vs. 152.00 ± 4.10 mmHg VDh) or proteinuria. Fetal anthropometrics were similar between the groups, whereas VDd displayed lower placental:fetal weight ratios (0.15 vs. 0.16 g/g, P = .01) and increased sFlt-1/PlGF ratio. Expression of hREN was lower in placenta of VDd dams (0.82 ± 0.44 AU vs. 1.52 ± 0.15 AU, P = .04). Expression of key vitamin D metabolizing enzymes was unchanged. Dietary vitamin D intervention did not alter key aspects of the preeclampsia phenotype using the transgenic rodent model of human renin-angiotensin system-mediated pre-eclampsia, plausibly due to altered vitamin D metabolism or excretion in the transgenic rats.
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Affiliation(s)
- Louise Bjørkholt Andersen
- HansChristian Andersen Children's Hospital, Odense University Hospital, Odense, Denmark; Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Michaela Golic
- Experimental and Clinical Research Center, a joint cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and the Charité-Universitäsmedizin Berlin, Berlin, Germany; Department of Obstetrics, Charité-Universitätsmedizin Berlin, Berlin, Germany; Department of Gynecology, Charité-Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - Lukasz Przybyl
- Experimental and Clinical Research Center, a joint cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and the Charité-Universitäsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany; Charité-Universitätsmedizin Berlin, Campus Berlin Buch, Berlin, Germany
| | - Grith Lykke Sorensen
- Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Jan Stener Jørgensen
- Institute of Clinical Research, University of Southern Denmark, Odense, Denmark; Department of Obstetrics and Gynecology, Odense University Hospital, Odense, Denmark
| | - Palle Fruekilde
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
| | | | - Florian Herse
- Experimental and Clinical Research Center, a joint cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and the Charité-Universitäsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany; Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | | | - Ralf Dechend
- Experimental and Clinical Research Center, a joint cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and the Charité-Universitäsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany; Charité-Universitätsmedizin Berlin, Campus Berlin Buch, Berlin, Germany; Department of Cardiology and Nephrology, HELIOS Klinikum Berlin, Berlin, Germany
| | - Henrik Thybo Christesen
- HansChristian Andersen Children's Hospital, Odense University Hospital, Odense, Denmark; Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Nadine Haase
- Experimental and Clinical Research Center, a joint cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and the Charité-Universitäsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Berlin, Germany; Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany.
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45
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Chemotyping the distribution of vitamin D metabolites in human serum. Sci Rep 2016; 6:21080. [PMID: 26864540 PMCID: PMC4750036 DOI: 10.1038/srep21080] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/18/2016] [Indexed: 12/03/2022] Open
Abstract
Most studies examining the relationships between vitamin D and disease or health focus on the main 25-hydroxyvitamin D3 (25(OH)D3) metabolite, thus potentially overlooking contributions and dynamic effects of other vitamin D metabolites, the crucial roles of several of which have been previously demonstrated. The ideal assay would determine all relevant high and low-abundant vitamin D species simultaneously. We describe a sensitive quantitative assay for determining the chemotypes of vitamin D metabolites from serum after derivatisation and ultra-high performance liquid chromatography-electrospray ionisation-tandem mass spectrometry (UHPLC-ESI-MS/MS). We performed a validation according to the ‘FDA Guidance for Industry Bioanalytical Method Validation’. The proof-of-concept of the method was then demonstrated by following the metabolite concentrations in patients with chronic liver diseases (CLD) during the course of a vitamin D supplementation study. The new quantitative profiling assay provided highly sensitive, precise and accurate chemotypes of the vitamin D metabolic process rather than the usually determined 25(OH)D3 concentrations.
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46
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Fohner AE, Wang Z, Yracheta J, O’Brien DM, Hopkins SE, Black J, Philip J, Wiener HW, Tiwari HK, Stapleton PL, Tsai JM, Thornton TA, Boyer BB, Thummel KE. Genetics, Diet, and Season Are Associated with Serum 25-Hydroxycholecalciferol Concentration in a Yup'ik Study Population from Southwestern Alaska. J Nutr 2016; 146:318-25. [PMID: 26661839 PMCID: PMC4725435 DOI: 10.3945/jn.115.223388] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 11/09/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Low blood vitamin D concentration is a concern for people living in circumpolar regions, where sunlight is insufficient for vitamin D synthesis in winter months and the consumption of traditional dietary sources of vitamin D is decreasing. OBJECTIVE The objective was to characterize the effects of diet, genetic variation, and season on serum 25-hydroxycholecalciferol [25(OH)D3] concentrations in Yup'ik Alaska Native people living in rural southwest Alaska. METHODS This study was a cross-sectional design that assessed the associations of traditional diet (via a biomarker, the RBC δ(15)N value), age, gender, body mass index (BMI), community location, and genotype of select single nucleotide polymorphisms (SNPs) in cytochrome P450 family 2, subfamily R, peptide 1 (CYP2R1), 7-dehydrocholesterol reductase (DHCR7), and vitamin D binding protein (GC) with serum 25(OH)D3 concentrations in 743 Yup'ik male and female participants, aged 14-93 y, recruited between September 2009 and December 2013. RESULTS Yup'ik participants, on average, had adequate concentrations of serum 25(OH)D3 (31.1 ± 1.0 ng/mL). Variations in diet, BMI, age, gender, season of sample collection, and inland or coastal community geography were all significantly associated with serum 25(OH)D3 concentration. In models not adjusting for other covariates, age, diet, and seasonal effects explained 33.7%, 20.7%, and 9.8%, respectively, of variability in serum 25(OH)D3 concentrations. Of the 8 SNPs interrogated in CYP2R1 and DHCR7, only rs11023374 in CYP2R1 was significantly associated with serum 25(OH)D3, explaining 1.5% of variability. The GC haplotype explained an additional 2.8% of variability. Together, age, diet, gender, season of sample collection, BMI, geography of the community, and genotype at rs11023374 explained 52.5% of the variability in serum 25(OH)D3 concentrations. CONCLUSIONS Lower consumption of the traditional diet was associated with lower serum concentrations of 25(OH)D3. Younger adults and youth in this community may be at increased risk of adverse outcomes associated with vitamin D insufficiency compared with older members of the community, especially during seasons of low sunlight exposure, because of lower consumption of dietary sources of vitamin D.
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Affiliation(s)
| | | | | | - Diane M O’Brien
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK; and
| | - Scarlett E Hopkins
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK; and
| | - Jynene Black
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK; and
| | - Jacques Philip
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK; and
| | - Howard W Wiener
- School of Public Health, University of Alabama at Birmingham, Birmingham, AL
| | - Hemant K Tiwari
- School of Public Health, University of Alabama at Birmingham, Birmingham, AL
| | | | | | | | - Bert B Boyer
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK; and
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47
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Abstract
Sensitive and reliable analysis of endogenous compounds is critically important for many physiological and pathological studies. Methods based on LC–MS have progressed to become the method of choice for analyzing endogenous compounds. However, the analysis can be challenging due to various factors, including inherent low concentrations in biological samples, low ionization efficiency, undesirable chromatographic behavior and interferences of complex biological. The integration of chemical derivatization with LC–MS could enhance its capabilities in sensitivity and selectivity, and extend its application to a wider range of analytes. In this article, we will review the derivatization strategies in the LC–MS analysis of various endogenous compounds, and provide applications highlighting the impact of these important techniques in the evaluation of pathological events.
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48
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Hawkes CP, Schnellbacher S, Singh R, Levine MA. Response to the Letter by Pauwels, et al. J Clin Endocrinol Metab 2015; 100:L84-5. [PMID: 26339746 DOI: 10.1210/jc.2015-3007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- C P Hawkes
- Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905
| | - S Schnellbacher
- Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905
| | - R Singh
- Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905
| | - M A Levine
- Division of Endocrinology and Diabetes (C.P.H., S.S., M.A.L.), The Children's Hospital of Philadelphia, and Department of Pediatrics (M.A.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104; National Children's Research Centre (C.P.H.), Dublin 12, Ireland; and Department of Laboratory Medicine and Pathology (R.S.), The Mayo Clinic, Rochester, Minnesota 55905
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Le Goff C, Cavalier E, Souberbielle JC, González-Antuña A, Delvin E. Measurement of circulating 25-hydroxyvitamin D: A historical review. Pract Lab Med 2015; 2:1-14. [PMID: 28932799 PMCID: PMC5597717 DOI: 10.1016/j.plabm.2015.04.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/24/2015] [Accepted: 04/16/2015] [Indexed: 11/26/2022] Open
Abstract
The constantly increasing requests for the measurement of serum 25-hydroxyvitamin D over the last years has led reagent manufacturers to market different automated and semi-automated methods, that being unfortunately not fully harmonized, yield different results. Liquid chromatography coupled to tandem mass spectrometry (LC/MS2) has more recently been introduced. This approach allows the distinction between the two forms of 25-hydroxyvitamin D and to measure other metabolites. This approach also requires harmonization to curtail the differences between the different analytical methods. To meet this requirement, the American National Institutes of Health (NIH), the Centre for Disease Control and Prevention (CDC) in Atlanta, the National Institute of Standards and Technology (NIST) and the vitamin D Reference laboratory of Ghent University have pooled their expertise to develop a standardization program. This article reviews the main elements and the difficulties of the automated and semi-automated methods for 25-hydroxyvitamin D, from sample preparation to the analytical phase, as well as those related to mass spectrometry. It also emphasizes the need for standardization to better define the clinical decision thresholds of vitamin D nutritional status.
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Affiliation(s)
- C. Le Goff
- Service de Chimie Clinique, CHU de Liège, Belgium
| | - E. Cavalier
- Service de Chimie Clinique, CHU de Liège, Belgium
| | - J.-C. Souberbielle
- Service des Explorations Fonctionnelles Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | | | - E. Delvin
- Centre de Recherche, CHU Sainte-Justine, 3175 Côte Sainte-Catherine, Montréal, Québec, Canada H3T 1C5
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50
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Tai SSC, Nelson MA. Candidate Reference Measurement Procedure for the Determination of (24R),25-Dihydroxyvitamin D3 in Human Serum Using Isotope-Dilution Liquid Chromatography-Tandem Mass Spectrometry. Anal Chem 2015; 87:7964-70. [PMID: 26171884 DOI: 10.1021/acs.analchem.5b01861] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The two major forms of vitamin D, vitamin D3 and vitamin D2, are metabolized in the liver through hydroxylation to 25-hydroxyvitamin D species, and then further hydroxylated in the kidney to various dihydroxyvitamin D species. (24R),25-Dihydroxyvitamin D3 ((24R),25(OH)2D3) is a major catabolite of 25-hydroxyvitamin D metabolism and is an important vitamin D metabolite used as a catabolism marker and indicator of kidney disease. The National Institute of Standards and Technology has recently developed a reference measurement procedure for the determination of (24R),25(OH)2D3 in human serum using isotope-dilution LC-MS/MS. The (24R),25(OH)2D3 and added deuterated labeled internal standard (24R),25(OH)2D3-d6 were extracted from serum matrix using liquid-liquid extraction prior to LC-MS/MS analysis. Chromatographic separation was performed using a fused-core C18 column. Atmospheric pressure chemical ionization in the positive ion mode and multiple reaction monitoring were used for LC-MS/MS. The accuracy of the measurement of (24R),25(OH)2D3 was evaluated by recovery studies of measuring (24R),25(OH)2D3 in gravimetrically prepared spiked samples of human serum with known (24R),25(OH)2D3 levels. The recoveries of the added (24R),25(OH)2D3 averaged 99.0% (0.8% SD), and the extraction efficiencies averaged 95% (2% SD). Excellent repeatability was demonstrated with CVs of ∼1%. The limit of quantitation at a signal-to-noise ratio of ∼10 was 0.2 ng/g. Potential isomeric interferences from other endogenous species and from impurity components of the reference standard were investigated. LC baseline resolution of (24R),25(OH)2D3 from these isomers was achieved within 35 min. This method was used for value assignment of (24R),25(OH)2D3 in Standard Reference Materials of Vitamin D Metabolites in Human Serum, which can serve as an accuracy base for routine methods used in clinical laboratories.
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Affiliation(s)
- Susan S-C Tai
- Chemical Sciences Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Michael A Nelson
- Chemical Sciences Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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