Comparison of Calcium Metabolism in Caucasian and Asian Postmenopausal Women of Chinese Descent and the Use of Strontium as a Qualitative Marker of Calcium Metabolism
NCT ID: NCT02565602
Last Updated: 2016-10-17
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
10 participants
INTERVENTIONAL
2014-02-28
2016-09-30
Brief Summary
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Detailed Description
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Conditions
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Study Design
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NA
SINGLE_GROUP
BASIC_SCIENCE
NONE
Study Groups
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Ca-41 & Sr-84 (isotope tracers) & vit D
Dosages: 3.7 kBq (100 nCi) Ca-41, 5 mg of Sr-84 and 400IU of vitamin D (daily)
Ca-41(isotope tracer)
Ca-41 is given orally in the form of (Ca-41)Cl3 in citrate-buffered solution. Tracer will be used to determine parameters of calcium metabolism based on tracer excretion data.
Sr-84 (isotope tracer)
Sr-84 is given orally in the form of (Sr-84)Cl2 in aqueous solution.Tracer will be used to determine parameters of strontium metabolism based on tracer excretion data.
Vitamin D
One tablet daily (400IU per tablet)
Interventions
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Ca-41(isotope tracer)
Ca-41 is given orally in the form of (Ca-41)Cl3 in citrate-buffered solution. Tracer will be used to determine parameters of calcium metabolism based on tracer excretion data.
Sr-84 (isotope tracer)
Sr-84 is given orally in the form of (Sr-84)Cl2 in aqueous solution.Tracer will be used to determine parameters of strontium metabolism based on tracer excretion data.
Vitamin D
One tablet daily (400IU per tablet)
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
2. Between the ages of 50 and 75 years old.
3. Both parents and 4 grandparents are/were of Chinese descent. It is not a necessity for the participant, participant's parents and grandparent's to be born and raised in Singapore to participate in this study.
4. BMI above 16 and below 30
Exclusion Criteria
2. Presence of significant liver disease, malignancy (excluding myeloma in the study group), malabsorption syndrome, hypoparathyroidism, hyperparathyroidism, sarcoidosis or hyperthyroidism (from toxic multinodular goitre or Graves disease), Paget's disease osteosarcoma, acromegaly, Cushing's syndrome, hypopituitarism, diabetes mellitus or severe chronic obstructive pulmonary disease.
3. Current smoking and an alcohol intake exceeding one standard drink per day
4. Undergoing treatment with any of the following drugs (within the last 12 months) i) adrenocorticoid steroids (3 months or longer at anytime or \>10 days of treatment within the previous 12 months) ii) anticonvulsant therapy iii) pharmacological doses of thyroid hormone (causing decline of TSH below normal) iv) bisphosphonates v) calcitonin vi) synthetic parathyroid hormone vii) selective estrogen receptor modulators viii) strontium ranelate ix) estrogen therapy x ) chemotherapeutic agents xi) sodium fluoride (any history of treatment with fluoride) xii) medications known to affect calcium metabolism (diuretics, antacids, calcium channel blockers etc.).
5. Presence of any other chronic illnesses.
6. Any other significant medical, psychiatric and/or social issue as determined by the investigator that would compromise subject's safety and/or compliance with trial procedure.
7. Any other clinically significant screening laboratory abnormality (as determined by the investigators).
50 Years
75 Years
FEMALE
Yes
Sponsors
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National University of Singapore
OTHER
Responsible Party
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Thomas Walczyk
Associate Professor
Principal Investigators
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Thomas Walczyk
Role: PRINCIPAL_INVESTIGATOR
National University of Singapore
Lawrence Lee
Role: PRINCIPAL_INVESTIGATOR
National University Health System
Locations
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Investigational Medicine Unit
Singapore, Singapore, Singapore
Countries
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References
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Cabrera WE, Schrooten I, De Broe ME, D'Haese PC. Strontium and bone. J Bone Miner Res. 1999 May;14(5):661-8. doi: 10.1359/jbmr.1999.14.5.661. No abstract available.
Denk E, Hillegonds D, Vogel J, Synal A, Geppert C, Wendt K, Fattinger K, Hennessy C, Berglund M, Hurrell RF, Walczyk T. Labeling the human skeleton with 41Ca to assess changes in bone calcium metabolism. Anal Bioanal Chem. 2006 Nov;386(6):1587-602. doi: 10.1007/s00216-006-0795-5. Epub 2006 Oct 11.
Denk E, Hillegonds D, Hurrell RF, Vogel J, Fattinger K, Hauselmann HJ, Kraenzlin M, Walczyk T. Evaluation of 41calcium as a new approach to assess changes in bone metabolism: effect of a bisphosphonate intervention in postmenopausal women with low bone mass. J Bone Miner Res. 2007 Oct;22(10):1518-25. doi: 10.1359/jbmr.070617.
Lee WH, Wastney ME, Jackson GS, Martin BR, Weaver CM. Interpretation of 41Ca data using compartmental modeling in post-menopausal women. Anal Bioanal Chem. 2011 Feb;399(4):1613-22. doi: 10.1007/s00216-010-4454-5. Epub 2010 Dec 9.
Lin Y, Hillegonds DJ, Gertz ER, Van Loan MD, Vogel JS. Protocol for assessing bone health in humans by tracing long-lived 41Ca isotope in urine, serum, and saliva samples. Anal Biochem. 2004 Sep 1;332(1):193-5. doi: 10.1016/j.ab.2004.05.019. No abstract available.
Suzuki T. Risk factors for osteoporosis in Asia. J Bone Miner Metab. 2001;19(3):133-41. doi: 10.1007/s007740170032. No abstract available.
Villegas R, Gao YT, Dai Q, Yang G, Cai H, Li H, Zheng W, Shu XO. Dietary calcium and magnesium intakes and the risk of type 2 diabetes: the Shanghai Women's Health Study. Am J Clin Nutr. 2009 Apr;89(4):1059-67. doi: 10.3945/ajcn.2008.27182. Epub 2009 Feb 18.
Wastney ME, Martin BR, Peacock M, Smith D, Jiang XY, Jackman LA, Weaver CM. Changes in calcium kinetics in adolescent girls induced by high calcium intake. J Clin Endocrinol Metab. 2000 Dec;85(12):4470-5. doi: 10.1210/jcem.85.12.7004.
Wu L, Martin BR, Braun MM, Wastney ME, McCabe GP, McCabe LD, DiMeglio LA, Peacock M, Weaver CM. Calcium requirements and metabolism in Chinese-American boys and girls. J Bone Miner Res. 2010 Aug;25(8):1842-9. doi: 10.1002/jbmr.76.
International Commission on Radiological Protection (1991) Biological aspects of radiological protection. Annals of the ICRP. 21, 11-25.
Dose coefficients for intakes of radionuclides by workers. A report of a Task Group of Committee 2 of the International Commission on Radiological Protection. Ann ICRP. 1994;24(4):1-83. No abstract available.
Schulze-König, T., Maden, C., Denk, E., Freeman, S. P. H. T., Stocker, M., Suter, M., Synal, A., Walczyk, T. (2010) Comparison of 41Ca analysis on 0.5 MV and 5 MV-AMS systems. Nuclear Instruments and Methods in Physics Research B. 268, 752-755.
Other Identifiers
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2012/01000
Identifier Type: -
Identifier Source: org_study_id
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