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Tan RSG, Lee CHL, Pan W, Wohlgemuth S, Doschak MR, Alexander RT. Disruption of the c-terminal serine protease domain of Fam111a does not alter calcium homeostasis in mice. Physiol Rep 2024; 12:e15977. [PMID: 38697929 PMCID: PMC11065693 DOI: 10.14814/phy2.15977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/28/2024] [Accepted: 03/01/2024] [Indexed: 05/05/2024] Open
Abstract
FAM111A gene mutations cause Kenney-Caffey syndrome (KCS) and Osteocraniostenosis (OCS), conditions characterized by short stature, low serum ionized calcium (Ca2+), low parathyroid hormone (PTH), and bony abnormalities. The molecular mechanism mediating this phenotype is unknown. The c-terminal domain of FAM111A harbors all the known disease-causing variations and encodes a domain with high homology to serine proteases. However, whether this serine protease domain contributes to the maintenance of Ca2+ homeostasis is not known. We hypothesized the disruption of the serine protease domain of FAM111A would disrupt Ca2+ homeostasis. To test this hypothesis, we generated with CRISPR/Cas9, mice with a frameshift insertion (c.1450insA) or large deletion (c.1253-1464del) mutation in the Fam111a serine protease domain. Serum-ionized Ca2+ and PTH levels were not significantly different between wild type, heterozygous, or homozygous Fam111a mutant mice. Additionally, there were no significant differences in fecal or urine Ca2+ excretion, intestinal Ca2+ absorption or overall Ca2+ balance. Only female homozygous (c.1450insA), but not heterozygous mice displayed differences in bone microarchitecture and mineral density compared to wild-type animals. We conclude that frameshift mutations that disrupt the c-terminal serine protease domain do not induce a KCS or OCS phenotype in mice nor alter Ca2+ homeostasis.
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Affiliation(s)
- Rebecca Siu Ga Tan
- Department of PhysiologyUniversity of AlbertaEdmontonAlbertaCanada
- Membrane Protein Disease Research GroupUniversity of AlbertaEdmontonAlbertaCanada
- The Women and Children's Health Research InstituteEdmontonAlbertaCanada
| | - Christy Hui Lin Lee
- Department of PhysiologyUniversity of AlbertaEdmontonAlbertaCanada
- Membrane Protein Disease Research GroupUniversity of AlbertaEdmontonAlbertaCanada
- The Women and Children's Health Research InstituteEdmontonAlbertaCanada
| | - Wanling Pan
- Department of PhysiologyUniversity of AlbertaEdmontonAlbertaCanada
- Membrane Protein Disease Research GroupUniversity of AlbertaEdmontonAlbertaCanada
| | | | - Michael R. Doschak
- Faculty of Pharmacy & Pharmaceutical SciencesUniversity of AlbertaEdmontonAlbertaCanada
| | - R. Todd Alexander
- Department of PhysiologyUniversity of AlbertaEdmontonAlbertaCanada
- Membrane Protein Disease Research GroupUniversity of AlbertaEdmontonAlbertaCanada
- The Women and Children's Health Research InstituteEdmontonAlbertaCanada
- Department of PediatricsUniversity of AlbertaEdmontonAlbertaCanada
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Holt R, Jorsal MJ, Yahyavi SK, Qin S, Juul A, Jørgensen N, Blomberg Jensen M. High-dose cholecalciferol supplementation to obese infertile men is sufficient to reach adequate vitamin D status. Br J Nutr 2024; 131:642-647. [PMID: 37811573 DOI: 10.1017/s0007114523002222] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Obesity is associated with low vitamin D status, and the optimal supplement and dosage of cholecalciferol (vitamin D3) or calcidiol (25OHD) for individuals with obesity have been debated. We aimed to determine the effect of high-dose vitamin D3 supplementation on achieving adequate vitamin D levels among infertile men with normal weight v. obesity. Here, we present secondary end points from a single-centre, double-blinded, randomised clinical trial, comprising 307 infertile men randomised to active or placebo treatment for 150 days. Men in the active group initially received an oral bolus of 300 000 mg of vitamin D3, followed by daily supplementation with 1400 mg of vitamin D3 and 500 mg of calcium. Baseline BMI was listed as a predefined subgroup. At baseline, serum 25OHD was significantly higher in men with normal weight (BMI < 25 kg/m2) compared with men with overweight (BMI 25-30 kg/m2) and obesity (BMI > 30 kg/m2) (48 nmol/l v. 45 nmol/l and 39 nmol/l, respectively; P = 0·024). After the intervention, men with normal weight, overweight and obesity treated with vitamin D3 had a significantly higher serum 25OHD compared with corresponding placebo-treated men (BMI < 25 kg/m2: 92 nmol/l v. 53 nmol/l, BMI = 25-30 kg/m2: 87 nmol/l v. 49 nmol/l and BMI > 30 kg/m2: 85 nmol/l v. 48 nmol/l; P < 0·001 for all, respectively). In conclusion, we show that high-dose vitamin D3 supplementation to infertile men with obesity and low vitamin D status is sufficient to achieve adequate serum 25OHD levels.
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Affiliation(s)
- Rune Holt
- Group of Skeletal, Mineral and Gonadal Endocrinology, Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
| | - Mads Joon Jorsal
- Group of Skeletal, Mineral and Gonadal Endocrinology, Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
| | - Sam Kafai Yahyavi
- Group of Skeletal, Mineral and Gonadal Endocrinology, Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
| | - Simeng Qin
- Group of Skeletal, Mineral and Gonadal Endocrinology, Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
| | - Anders Juul
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Niels Jørgensen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Martin Blomberg Jensen
- Group of Skeletal, Mineral and Gonadal Endocrinology, Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
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Tetens I, Hare MH, Petersen CF, Stanstrup J, Hitz MF. The Postprandial Calcium Absorption of a Milk-Derived Calcium Permeate - The Acute RENEW Double-Blinded Randomized Controlled Cross-Over Study. J Nutr 2023; 153:3430-3438. [PMID: 37844839 DOI: 10.1016/j.tjnut.2023.10.005] [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: 05/15/2023] [Revised: 09/29/2023] [Accepted: 10/02/2023] [Indexed: 10/18/2023] Open
Abstract
BACKGROUND Studies suggest that dairy-derived calcium supplements have additional beneficial properties compared with other calcium supplements in relation to bone health. OBJECTIVES We investigated the postprandial calcium absorption from a milk-derived calcium permeate (CP) compared with calcium carbonate (CC). METHODS In this randomized double-blinded cross-over study, 10 healthy postmenopausal females (age 50-65 y) received maltodextrin (placebo), 800 mg calcium from CP or from CC provided in 6 capsules on separate days. A fasting blood sample was collected at baseline, 60, 120, 240, and 360 min after ingestion. At baseline and 360 min, spot-urine samples were collected. Serum-ionized calcium, intact parathyroid hormone, phosphorus, and magnesium were analyzed, as were urinary calcium, phosphorus, and magnesium. A linear mixed model was applied. RESULTS Serum-ionized calcium concentration after the CC supplement was higher at 240 min compared with the CP supplement [between-group difference; 95% confidence interval (CI): 0.039 mmol/L; 95% CI: 0.017-0.061; P = 0.00078]. Serum-ionized calcium concentration after the CC supplement was significantly higher than placebo at all postprandial time points except at 60 min. Urinary calcium concentration in 360 min spot urine was higher after intake of CC compared with CP [between-group difference; 95% CI: 2.47 mmol/L; 95% CI: 1.90-3.03; P = 0.0042]. CONCLUSIONS Postprandial calcium absorption from CP was lower than that of CC, and concurrently, urinary concentration reflected increased serum appearance by CC compared with CP, highlighting different metabolic responses. The long-term and clinical implications should be studied further.
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Affiliation(s)
- Inge Tetens
- Department of Nutrition, Exercise, and Sports, University of Copenhagen, Frederiksberg C, Denmark.
| | - Majbritt Hybholt Hare
- Department of Nutrition, Exercise, and Sports, University of Copenhagen, Frederiksberg C, Denmark; National Research Center for Bone Health, Zealand University Hospital, Køge, Denmark
| | | | - Jan Stanstrup
- Department of Nutrition, Exercise, and Sports, University of Copenhagen, Frederiksberg C, Denmark
| | - Mette Friberg Hitz
- National Research Center for Bone Health, Zealand University Hospital, Køge, Denmark
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Tostivint IN, Castiglione V, Alkouri R, Bertocchio JP, Inaoui R, Daudon M, Dousseaux MP, Cavalier E, Pieroni L, Izzedine H. How useful is an oral calcium load test for diagnosing recurrent calcium stone formers? Urolithiasis 2022; 50:577-587. [PMID: 35994082 DOI: 10.1007/s00240-022-01355-w] [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: 02/12/2022] [Accepted: 08/10/2022] [Indexed: 10/15/2022]
Abstract
Hypercalciuria is the main risk factor for recurrent calcium urolithiasis. The goal of our study is to determinate how useful an oral calcium load test is for stone formers to classify different forms of hypercalciuria in pathogenetic categories defined as renal or absorptive according to the current knowledge. Between June 2013 and February 2016, a prospective study was carried out on 117 documented recurrent hypercalciuric stone formers undergoing an oral calcium load test modified from the original description by Pak. After 2 days of calcium-restricted diet, urine and blood were analyzed at baseline and 120 min after receiving orally 1 g of calcium. Total and ionized calcium, parathyroid hormone from serum and urine calcium and creatinine were assessed in order to divide patients in three groups as previously described: resorptive, absorptive, and renal hypercalciuria. This allowed the identification of 19, 39, 34 and 33 patients with normocalcemic primary hyperparathyroidism (NPHPT), renal hypercalciuria aka renal calcium leak (RCL), absorptive hypercalciuria (AH) and unidentified cause, respectively. Patients with NPHPT (who required parathyroidectomy) experienced a lower PTH decrease (41.41 ± 12.82 vs. 54.06 ± 13.84% p < 0.01), higher beta-crosslaps, as well as lower TmP/GFR and distal third radius bone mineral density. RCL resulted in increased fasting urine calcium-to-creatinine ratio (Uca/Cr), i.e., > 0.37 mmol/mmol), without hyperparathyroidism. AH was diagnosed by the presence of ΔUCa/Cr > 0.60 mmol/mmol between baseline and 120 min without any other anomaly. For all remaining patients, results were inconclusive due to the lack of sufficient increase in serum calcium or because the cause of lithogenesis could not be clearly identified. The oral calcium load test is useful in nearly 80% of patients by identifying the different forms of hypercalciuria causing urolithiasis and by guiding treatment, including parathyroid surgery.
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Affiliation(s)
- Isabelle N Tostivint
- Department of Nephrology, AP-HP, Pitie Salpetriere Hospital, 48 Boulevard de l'Hôpital, 75013, Paris, France.
- GRC 20 SORBONNE UNIVERSITY Clinical multidisciplinary Research Group on Kidney Stones, Sorbonne University Tenon Hospital, Paris, France.
| | - Vincent Castiglione
- Department of Clinical Chemistry, University Hospital of Liege, Liege, Belgium
| | - Rana Alkouri
- Department of Metabolic Biochemistry, AP-HP, Pitie Salpetriere Hospital, Paris, France
| | - Jean Philippe Bertocchio
- Department of Nephrology, AP-HP, Pitie Salpetriere Hospital, 48 Boulevard de l'Hôpital, 75013, Paris, France
- Rare Diseases Network OSCAR, Center for Excellence in Rare Calcium and Phosphate Disorders, Paris, France
| | - Rachida Inaoui
- Department of Rheumatology, AP-HP, Pitie Salpetriere Hospital, Paris, France
| | - Michel Daudon
- Department of Biochemistry, Cristal Laboratory, AP-HP, Tenon Hospital, Paris, France
| | - Marie-Paule Dousseaux
- Department of Nutrition and Dietetics, AP-HP, Pitie Salpetriere Hospital, Paris, France
| | - Etienne Cavalier
- Department of Clinical Chemistry, University Hospital of Liege, Liege, Belgium
| | - Laurence Pieroni
- Department of Metabolic Biochemistry, AP-HP, Pitie Salpetriere Hospital, Paris, France
- Department of Biochemistry, Cristal Laboratory, AP-HP, Tenon Hospital, Paris, France
| | - Hassan Izzedine
- Department of Nephrology, Peupliers Private Hospital, Paris, France
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Shlisky J, Mandlik R, Askari S, Abrams S, Belizan JM, Bourassa MW, Cormick G, Driller‐Colangelo A, Gomes F, Khadilkar A, Owino V, Pettifor JM, Rana ZH, Roth DE, Weaver C. Calcium deficiency worldwide: prevalence of inadequate intakes and associated health outcomes. Ann N Y Acad Sci 2022; 1512:10-28. [PMID: 35247225 PMCID: PMC9311836 DOI: 10.1111/nyas.14758] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/26/2022] [Indexed: 12/18/2022]
Abstract
Dietary calcium deficiency is considered to be widespread globally, with published estimates suggesting that approximately half of the world's population has inadequate access to dietary calcium. Calcium is essential for bone health, but inadequate intakes have also been linked to other health outcomes, including pregnancy complications, cancers, and cardiovascular disease. Populations in low- and middle-income countries (LMICs) are at greatest risk of low calcium intakes, although many individuals in high-income countries (HICs) also do not meet recommendations. Paradoxically, many LMICs with lower calcium intakes show lower rates of osteoporotic fracture as compared with HICs, though data are sparse. Calcium intake recommendations vary across agencies and may need to be customized based on other dietary factors, health-related behaviors, or the risk of calcium-related health outcomes. The lack of standard methods to assess the calcium status of an individual or population has challenged efforts to estimate the prevalence of calcium deficiency and the global burden of related adverse health consequences. This paper aims to consolidate available evidence related to the global prevalence of inadequate calcium intakes and associated health outcomes, with the goal of providing a foundation for developing policies and population-level interventions to safely improve calcium intake and status where necessary.
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Affiliation(s)
| | - Rubina Mandlik
- Hirabai Cowasji Jehangir Medical Research InstitutePuneIndia
| | - Sufia Askari
- Children's Investment Fund FoundationLondonUnited Kingdom
| | | | - Jose M. Belizan
- Centro de Investigaciones en Epidemiología y Salud Pública (CIESP)Instituto de Efectividad Clínica y Sanitaria (IECS‐CONICET)Buenos AiresArgentina
| | | | - Gabriela Cormick
- Centro de Investigaciones en Epidemiología y Salud Pública (CIESP)Instituto de Efectividad Clínica y Sanitaria (IECS‐CONICET)Buenos AiresArgentina
| | | | - Filomena Gomes
- The New York Academy of SciencesNew YorkNew York
- NOVA Medical SchoolUniversidade NOVA de LisboaLisboaPortugal
| | | | - Victor Owino
- Division of Human HealthInternational Atomic Energy AgencyViennaAustria
| | - John M. Pettifor
- Faculty of Health SciencesUniversity of WitwatersrandJohannesburgSouth Africa
| | | | - Daniel E. Roth
- The Hospital for Sick Children/University of TorontoTorontoOntarioCanada
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6
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Tan RSG, Lee CHL, Dimke H, Todd Alexander R. The role of calcium-sensing receptor signaling in regulating transepithelial calcium transport. Exp Biol Med (Maywood) 2021; 246:2407-2419. [PMID: 33926258 DOI: 10.1177/15353702211010415] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The calcium-sensing receptor (CaSR) plays a critical role in sensing extracellular calcium (Ca2+) and signaling to maintain Ca2+ homeostasis. In the parathyroid, the CaSR regulates secretion of parathyroid hormone, which functions to increase extracellular Ca2+ levels. The CaSR is also located in other organs imperative to Ca2+ homeostasis including the kidney and intestine, where it modulates Ca2+ reabsorption and absorption, respectively. In this review, we describe CaSR expression and its function in transepithelial Ca2+ transport in the kidney and intestine. Activation of the CaSR leads to G protein dependent and independent signaling cascades. The known CaSR signal transduction pathways involved in modulating paracellular and transcellular epithelial Ca2+ transport are discussed. Mutations in the CaSR cause a range of diseases that manifest in altered serum Ca2+ levels. Gain-of-function mutations in the CaSR result in autosomal dominant hypocalcemia type 1, while loss-of-function mutations cause familial hypocalciuric hypercalcemia. Additionally, the putative serine protease, FAM111A, is discussed as a potential regulator of the CaSR because mutations in FAM111A cause Kenny Caffey syndrome type 2, gracile bone dysplasia, and osteocraniostenosis, diseases that are characterized by hypocalcemia, hypoparathyroidism, and bony abnormalities, i.e. share phenotypic features of autosomal dominant hypocalcemia. Recent work has helped to elucidate the effect of CaSR signaling cascades on downstream proteins involved in Ca2+ transport across renal and intestinal epithelia; however, much remains to be discovered.
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Affiliation(s)
- Rebecca Siu Ga Tan
- Department of Physiology, University of Alberta, Edmonton T6G 1C9, Canada.,Membrane Protein Disease Research Group, University of Alberta, Edmonton T6G 1C9, Canada
| | | | - Henrik Dimke
- Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, Odense 5000, Denmark.,Department of Nephrology, Odense University Hospital, Odense 5000, Denmark
| | - R Todd Alexander
- Department of Physiology, University of Alberta, Edmonton T6G 1C9, Canada.,Membrane Protein Disease Research Group, University of Alberta, Edmonton T6G 1C9, Canada.,Department of Pediatrics, University of Alberta, Edmonton T6G 1C9, Canada
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El Bilbeisi AH, El Afifi A, Farag HAM, Djafarian K. Effects of vitamin D supplementation along with and without endurance physical activity on calcium and parathyroid hormone levels in metabolic syndrome patients: A randomized controlled trial. CLINICAL NUTRITION OPEN SCIENCE 2021. [DOI: 10.1016/j.nutos.2020.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Villa-Etchegoyen C, Lombarte M, Matamoros N, Belizán JM, Cormick G. Mechanisms Involved in the Relationship between Low Calcium Intake and High Blood Pressure. Nutrients 2019; 11:E1112. [PMID: 31109099 PMCID: PMC6566648 DOI: 10.3390/nu11051112] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/01/2019] [Accepted: 05/16/2019] [Indexed: 01/21/2023] Open
Abstract
There is increasing epidemiologic and animal evidence that a low calcium diet increases blood pressure. The aim of this review is to compile the information on the link between low calcium intake and blood pressure. Calcium intake may regulate blood pressure by modifying intracellular calcium in vascular smooth muscle cells and by varying vascular volume through the renin-angiotensin-aldosterone system. Low calcium intake produces a rise of parathyroid gland activity. The parathyroid hormone increases intracellular calcium in vascular smooth muscles resulting in vasoconstriction. Parathyroidectomized animals did not show an increase in blood pressure when fed a low calcium diet as did sham-operated animals. Low calcium intake also increases the synthesis of calcitriol in a direct manner or mediated by parathyroid hormone (PTH). Calcitriol increases intracellular calcium in vascular smooth muscle cells. Both low calcium intake and PTH may stimulate renin release and consequently angiotensin II and aldosterone synthesis. We are willing with this review to promote discussions and contributions to achieve a better understanding of these mechanisms, and if required, the design of future studies.
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Affiliation(s)
- Cecilia Villa-Etchegoyen
- Laboratory of Cardiovascular Surveillance of Drugs, Department of Toxicology and Pharmacology, School of Medicine, Universidad de Buenos Aires, Ciudad Autonoma de Buenos Aires, Buenos Aires 1121, Argentina.
| | - Mercedes Lombarte
- Bone Biology Laboratory, School of Medicine, Rosario National University, Rosario, Santa Fe 3100, Argentina.
| | - Natalia Matamoros
- Instituto de Desarrollo e Investigaciones Pediátricas "Prof. Dr. Fernando E. Viteri" Hospital de Niños "Sor María Ludovica de La Plata (IDIP), Ministerio de Salud/Comisión de Investigacines Científicas de la Provincia de Buenos Aires, La Plata, Buenos Aires 1900, Argentina.
| | - José M Belizán
- Department of Mother and Child Health Research, Institute for Clinical Effectiveness and Health Policy (IECS-CONICET), Ciudad Autonoma de Buenos Aires, Buenos Aires 1414, Argentina.
| | - Gabriela Cormick
- Department of Mother and Child Health Research, Institute for Clinical Effectiveness and Health Policy (IECS-CONICET), Ciudad Autonoma de Buenos Aires, Buenos Aires 1414, Argentina.
- Departamento de Salud, Universidad Nacional de La Matanza, Florencio Varela, San Justo 1903, Argentina.
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SAKAI S, HIEN VTT, TUYEN LD, DUC HA, MASUDA Y, YAMAMOTO S. Effects of Eggshell Calcium Supplementation on Bone Mass in Postmenopausal Vietnamese Women. J Nutr Sci Vitaminol (Tokyo) 2017; 63:120-124. [DOI: 10.3177/jnsv.63.120] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Seigo SAKAI
- Institute of Technology, R&D Division, Kewpie Corporation
| | | | | | | | | | - Shigeru YAMAMOTO
- Asian Nutrition and Food Culture Research Center, Jumonji University
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10
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Postprandial metabolic responses of serum calcium, parathyroid hormone and C-telopeptide of type I collagen to three doses of calcium delivered in milk. J Nutr Sci 2014; 3:e6. [PMID: 25191614 PMCID: PMC4153072 DOI: 10.1017/jns.2014.2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 12/23/2013] [Accepted: 01/14/2014] [Indexed: 01/07/2023] Open
Abstract
Acute doses of Ca rapidly increase serum Ca and reduce bone resorption concomitant with a
reduction in serum parathyroid hormone (PTH) levels. The physiological response to a dose
of Ca in milk and to a Ca salt may be different. The present study investigated Ca
absorption patterns with increasing levels of fortification in milk, and the response to
one dose of a Ca salt. A group of twenty-eight Asian women aged 20–45 years volunteered to
attend the laboratory over several weeks. The fasted volunteers were randomised to one of
three experimental drinks: 200 ml skimmed milk containing 250, 500 or 1000 mg Ca. A
subgroup of seven volunteers also received a calcium gluconate/carbonate salt containing
1000 mg Ca in 200 ml water. Serial blood samples and urine were collected for 5 h from
baseline. Different doses of Ca in milk resulted in a graded response in serum corrected
Ca, PTH and C-telopeptide of type I collagen (CTx) but not ionised Ca. Serum Ca increased
in response to all milk drinks and from 2 to 5 h the blood Ca levels were significantly
different for the 250 and 1000 mg doses, as was the integrated response between the loads.
The PTH response to the two higher doses was significantly more than following the 250 mg
dose. The integrated response for CTx and urinary Ca between all three doses of Ca in milk
was significantly different. A dose of Ca salt elicited a more immediate response reaching
a plateau faster, and declining faster to baseline. Fortified milk is a safe matrix for
delivering larger doses of Ca.
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11
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Abstract
Vitamin D deficiency is associated with osteoporosis and is thought to increase the risk of cancer and CVD. Despite these numerous potential health effects, data on vitamin D status at the population level and within key subgroups are limited. The aims of the present study were to examine patterns of 25-hydroxyvitamin D (25(OH)D) levels worldwide and to assess differences by age, sex and region. In a systematic literature review using the Medline and EMBASE databases, we identified 195 studies conducted in forty-four countries involving more than 168 000 participants. Mean population-level 25(OH)D values varied considerably across the studies (range 4·9-136·2 nmol/l), with 37·3 % of the studies reporting mean values below 50 nmol/l. The highest 25(OH)D values were observed in North America. Although age-related differences were observed in the Asia/Pacific and Middle East/Africa regions, they were not observed elsewhere and sex-related differences were not observed in any region. Substantial heterogeneity between the studies precluded drawing conclusions on overall vitamin D status at the population level. Exploratory analyses, however, suggested that newborns and institutionalised elderly from several regions worldwide appeared to be at a generally higher risk of exhibiting lower 25(OH)D values. Substantial details on worldwide patterns of vitamin D status at the population level and within key subgroups are needed to inform public health policy development to reduce risk for potential health consequences of an inadequate vitamin D status.
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12
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Wahl DA, Cooper C, Ebeling PR, Eggersdorfer M, Hilger J, Hoffmann K, Josse R, Kanis JA, Mithal A, Pierroz DD, Stenmark J, Stöcklin E, Dawson-Hughes B. A global representation of vitamin D status in healthy populations. Arch Osteoporos 2012; 7:155-72. [PMID: 23225293 DOI: 10.1007/s11657-012-0093-0] [Citation(s) in RCA: 220] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 08/06/2012] [Indexed: 02/06/2023]
Abstract
PURPOSE This paper visualizes the available data on vitamin D status on a global map, examines the existing heterogeneities in vitamin D status and identifies research gaps. METHODS A graphical illustration of global vitamin D status was developed based on a systematic review of the worldwide literature published between 1990 and 2011. Studies were eligible if they included samples of randomly selected males and females from the general population and assessed circulating 25-hydroxyvitamin D [25(OH)D] levels. Two different age categories were selected: children and adolescents (1-18 years) and adults (>18 years). Studies were chosen to represent a country based on a hierarchical set of criteria. RESULTS In total, 200 studies from 46 countries met the inclusion criteria, most coming from Europe. Forty-two of these studies (21 %) were classified as representative. In children, gaps in data were identified in large parts of Africa, Central and South America, Europe, and most of the Asia/Pacific region. In adults, there was lack of information in Central America, much of South America and Africa. Large regions were identified for which the mean 25(OH)D levels were below 50 nmol/L. CONCLUSIONS This study provides an overview of 25(OH)D levels around the globe. It reveals large gaps in information in children and adolescents and smaller but important gaps in adults. In view of the importance of vitamin D to musculoskeletal growth, development, and preservation, and of its potential importance in other tissues, we strongly encourage new research to clearly define 25(OH)D status around the world.
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Affiliation(s)
- D A Wahl
- International Osteoporosis Foundation, Nyon, Switzerland
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13
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Mueller EA, Seiberling M, Kirch W, Frentzel A, Trapp S. Pharmacokinetics and pharmacodynamics of calcium-vitamin D3chewable tablets: a single-blind, multiple-dose study in postmenopausal women. Expert Opin Drug Metab Toxicol 2011; 7:785-91. [DOI: 10.1517/17425255.2011.591378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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The metabolic syndrome and carotid intima-media thickness in relation to the parathyroid hormone to 25-OH-D(3) ratio in a general population. Am J Hypertens 2011; 24:102-9. [PMID: 20596035 DOI: 10.1038/ajh.2010.124] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Parathyroid hormone (PTH) and vitamin D interactively regulate calcium fluxes across membranes, and thereby modulate insulin sensitivity, blood pressure, and arterial calcification. We hypothesized that lower calcium intake as reflected by circulating PTH and 25-OH-D₃ might be associated with the metabolic syndrome (MS) and arterial calcification. METHODS In a random population sample (n = 542; 50.5% women; mean age, 49.8 ± 13.1 years), we measured MS prevalence (International Diabetes Federation (IDF) and American Heart Association (AHA) criteria), PTH and 25-OH-D₃, serum and 24-h urinary calcium, MS components, carotid intima-media thickness (CIMT), and calcium intake from dairy products. We assessed associations in multivariable-adjusted analyses, using linear and logistic regressions. RESULTS The prevalence of MS was 21.0% (IDF criteria) and 23.6% (AHA criteria). MS prevalence, blood pressure, waist circumference, body mass index, fasting blood glucose, insulin and triglycerides, and CIMT increased (P ≤ 0.042) across quartiles of the PTH/25-OH-D₃ ratio, whereas serum and 24-h urinary calcium decreased (P ≤ 0.029). Waist circumference and fasting blood glucose decreased across quartiles of habitual calcium intake (P ≤ 0.04). In models that included MS (IDF) and PTH/25-OH-D₃, the regression coefficients relating CIMT to PTH/25-OH-D₃ ratio and MS were +51 µm (P = 0.013) and +19 µm (P = 0.45), respectively. Multivariable-adjusted analyses were confirmatory. CONCLUSIONS MS prevalence and CIMT were positively associated with PTH/25-OH-D₃. CIMT was not associated with MS. Prospective studies and intervention trials should address the causality of these associations.
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Pearce MS, Relton CL, Groom A, Peaston RT, Francis RM. A lifecourse study of bone resorption in men ages 49-51years: the Newcastle Thousand Families cohort study. Bone 2010; 46:952-6. [PMID: 20080222 DOI: 10.1016/j.bone.2010.01.369] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 09/23/2009] [Accepted: 01/11/2010] [Indexed: 01/21/2023]
Abstract
It has been suggested that bone health in adulthood is programmed by development in utero. Most previous investigations addressing this topic have focussed on bone mineral density or content, rather than other indicators of bone health, such as biochemical markers of bone turnover. This study investigated whether potential predictors, from different stages of life, influence bone resorption in men aged 49-51years in the Newcastle Thousand Families birth cohort. The cohort originally consisted of all 1142 births in the city of Newcastle upon Tyne, UK in May and June 1947. Detailed information was collected prospectively during childhood, including birth weight and socio-economic circumstances. At 49-51years of age, 574 study members completed a detailed 'Health and Lifestyle' questionnaire, including the European Prospective Investigation of Cancer (EPIC) food frequency questionnaire and 412 study members attended for clinical examination, including 172 men in whom bone resorption was assessed by measurement of serum beta C-telopeptide of type 1 collagen (CTX). A significant trend was seen between increasingly disadvantaged socio-economic status at birth and increased bone resorption (p=0.04, r-squared 2.6%). However, birth weight, standardised for sex and gestational age, was not associated with serum CTX (p=0.77, r-squared 0.05%). Significant trends were also seen between increasing total energy intake (p=0.03, r-squared 2.9%), dietary intake of saturated fat (p=0.02, r-squared 2.6%), protein (p=0.04, r-squared 2.5%) and carbohydrates (p=0.04, r-squared 2.6%) and higher serum CTX. However, on adjustment for total energy intake, none of the other dietary variables was significant at the univariate level maintained significance. Our findings suggest that early socio-economic disadvantage and later dietary factors may be associated with increased bone resorption in middle aged men. However, as little of the variance in serum CTX was explained by the variables included within this investigation, further longitudinal studies, with sufficient statistical power, are required to assess predictors of bone resorption in adulthood and their relative importance.
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Affiliation(s)
- M S Pearce
- Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK.
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Low calcium:phosphorus ratio in habitual diets affects serum parathyroid hormone concentration and calcium metabolism in healthy women with adequate calcium intake. Br J Nutr 2009; 103:561-8. [DOI: 10.1017/s0007114509992121] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Excessive dietary P intake alone can be deleterious to bone through increased parathyroid hormone (PTH) secretion, but adverse effects on bone increase when dietary Ca intake is low. In many countries, P intake is abundant, whereas Ca intake fails to meet recommendations; an optimal dietary Ca:P ratio is therefore difficult to achieve. Our objective was to investigate how habitual dietary Ca:P ratio affects serum PTH (S-PTH) concentration and other Ca metabolism markers in a population with generally adequate Ca intake. In this cross-sectional analysis of 147 healthy women aged 31–43 years, fasting blood samples and three separate 24-h urinary samples were collected. Participants kept a 4-d food record and were divided into quartiles according to their dietary Ca:P ratios. The 1st quartile with Ca:P molar ratio ≤ 0·50 differed significantly from the 2nd (Ca:P molar ratio 0·51–0·57), 3rd (Ca:P molar ratio 0·58–0·64) and 4th (Ca:P molar ratio ≥ 0·65) quartiles by interfering with Ca metabolism. In the 1st quartile, mean S-PTH concentration (P = 0·021) and mean urinary Ca (U-Ca) excretion were higher (P = 0·051) than in all other quartiles. These findings suggest that in habitual diets low Ca:P ratios may interfere with homoeostasis of Ca metabolism and increase bone resorption, as indicated by higher S-PTH and U-Ca levels. Because low habitual dietary Ca:P ratios are common in Western diets, more attention should be focused on decreasing excessively high dietary P intake and increasing Ca intake to the recommended level.
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Kemi VE, Kärkkäinen MUM, Karp HJ, Laitinen KAE, Lamberg-Allardt CJE. Increased calcium intake does not completely counteract the effects of increased phosphorus intake on bone: an acute dose–response study in healthy females. Br J Nutr 2007; 99:832-9. [PMID: 17903344 DOI: 10.1017/s0007114507831783] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A high dietary P intake is suggested to have negative effects on bone through increased parathyroid hormone secretion, as high serum parathyroid hormone (S-PTH) concentration increases bone resorption. In many countries the P intake is 2- to 3-fold above dietary guidelines, whereas Ca intake is too low. This combination may not be optimal for bone health. In a previous controlled study, we found that dietary P dose-dependently increased S-PTH and bone resorption and decreased bone formation. The aim of the present study was to investigate the dose–response effects of Ca intake on Ca and bone metabolism with a dietary P intake higher than recommended. Each of the twelve healthy female subjects aged 21–40 years attended three 24-h study sessions, which were randomized with regard to a Ca dose of 0 (control day), 600 or 1200 mg, and each subject served as her own control. The meals on each study day provided 1850 mg P and 480 mg Ca. S-PTH concentration decreased (P < 0·001) and serum ionized Ca concentration increased (P < 0·001) with increasing Ca doses. The bone formation marker, serum bone-specific alkaline phosphatase, did not differ significantly (P = 0·4). By contrast, the bone resorption marker, urinary N-terminal telopeptide of collagen type I, decreased significantly with both Ca doses (P = 0·008). When P intake was above current recommendations, increased Ca intake was beneficial for bone, as indicated by decreased S-PTH concentration and bone resorption. However, not even a high Ca intake could affect bone formation when P intake was excessive.
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Affiliation(s)
- Virpi E Kemi
- Calcium Research Unit, Department of Applied Chemistry and Microbiology, University of Helsinki, Helsinki, Finland
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Viljakainen HT, Natri AM, Kärkkäinen M, Huttunen MM, Palssa A, Jakobsen J, Cashman KD, Mølgaard C, Lamberg-Allardt C. A positive dose-response effect of vitamin D supplementation on site-specific bone mineral augmentation in adolescent girls: a double-blinded randomized placebo-controlled 1-year intervention. J Bone Miner Res 2006; 21:836-44. [PMID: 16753014 DOI: 10.1359/jbmr.060302] [Citation(s) in RCA: 176] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
UNLABELLED The effect of vitamin D supplementation on bone mineral augmentation in 212 adolescent girls with adequate calcium intake was studied in a randomized placebo-controlled setting. Bone mineral augmentation determined by DXA increased with supplementation both in the femur and the lumbar vertebrae in a dose-responsive manner. Supplementation decreased the urinary excretion of resorption markers, but had no impact on formation markers. INTRODUCTION Adequate vitamin D intake protects the elderly against osteoporosis, but there exists no indisputable evidence that vitamin D supplementation would benefit bone mineral augmentation. The aim of this 1-year study was to determine in a randomized double-blinded trial the effect of 5 and 10 microg vitamin D3 supplementation on bone mineral augmentation in adolescent girls with adequate dietary calcium intake. MATERIALS AND METHODS Altogether, 228 girls (mean age, 11.4 +/- 0.4 years) participated. Their BMC was measured by DXA from the femur and lumbar spine. Serum 25-hydroxyvitamin D [S-25(OH)D], intact PTH (S-iPTH), osteocalcin (S-OC), and urinary pyridinoline (U-Pyr) and deoxypyridinoline (U-Dpyr) were measured. Statistical analysis was performed both with the intention-to-treat (IT) and compliance-based (CB) method. RESULTS In the CB analysis, vitamin D supplementation increased femoral BMC augmentation by 14.3% with 5 microg and by 17.2% with 10 microg compared with the placebo group (ANCOVA, p = 0.012). A dose-response effect was observed in the vertebrae (ANCOVA, p = 0.039), although only with the highest dose. The mean concentration of S-25(OH)D increased (p < 0.001) in the 5-microg group by 5.7 +/- 15.7 nM and in the 10-microg group by 12.4 +/- 13.7 nM, whereas it decreased by 6.7 +/- 11.3 nM in the placebo group. Supplementation had no effect on S-iPTH or S-OC, but it decreased U-DPyr (p = 0.042). CONCLUSIONS Bone mineral augmentation in the femur was 14.3% and 17.2% higher in the groups receiving 5 and 10 microg of vitamin D, respectively, compared with the placebo group, but only 10 mug increased lumbar spine BMC augmentation significantly. Vitamin D supplementation decreased the concentration of bone resorption markers, but had no impact on bone formation markers, thus explaining increased bone mineral augmentation. However, the positive effects were noted with the CB method but not with IT.
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Affiliation(s)
- Heli T Viljakainen
- Calcium Research Unit, Department of Applied Chemistry and Microbiology, University of Helsinki, Helsinki, Finland
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