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the relationship between parathyroid hormone and 25-hydroxy vitamin D during

Claire Sears
No abstract text is available yet for this article.
June 2016: Canadian Journal of Diabetes
Leila Shirazi, Martin Almquist, Johan Malm, Elisabet Wirfält, Jonas Manjer
BACKGROUND: Low blood levels of vitamin D (25-hydroxy D3, 25OHD3) in women have been associated with an increased risk of several diseases. A large part of the population may have suboptimal 25OHD3 levels but high-risk groups are not well known. The aim of the present study was to identify determinants for serum levels of 25OHD3 in women, i.e. factors such as lifestyle, menopausal status, diet and selected biochemical variables. METHODS: The study was based on women from the Malmö Diet and Cancer Study (MDCS), a prospective, population-based cohort study in Malmö, Sweden...
2013: BMC Women's Health
Catherine M Fisk, Hannah E Theobald, Thomas A B Sanders
Uncertainty remains regarding the efficacy of low intakes of ergocalciferol (vitamin D2 or D2) and cholecalciferol (vitamin D3 or D3) provided in food to increase serum 25-hydroxy-vitamin D (25-OH-D) metabolite concentrations when UV-B exposure is low. We recruited 40 healthy men and women into a double-blind, parallel design, randomized controlled trial. Participants received placebo or 1 of 4 experimental treatments (D2 or D3 at 5 or 10 μg/d) supplied as a malted milk drink for 4 wk during a period of minimal UV-B exposure in the UK...
July 2012: Journal of Nutrition
Mariko Doi, Rokeya Sultana Rekha, Sultan Ahmed, Masafumi Okada, Anjan Kumar Roy, Shams El Arifeen, Eva-Charlotte Ekström, Rubhana Raqib, Yukiko Wagatsuma
Ca status in the uterus during pregnancy has been suggested to affect fetal growth and size at birth. In Bangladesh, low Ca levels in pregnant women and low birth weight in infants are common. The present study explored the association between Ca levels in cord blood and newborn size at birth (birth weight and birth length) in Bangladesh. Samples and data included 223 women with live-born singleton deliveries in rural Bangladesh. Newborn weight and length were measured at birth. From cord blood obtained at delivery, Ca, 25-hydroxy vitamin D, bone-specific alkaline phosphatase and intact parathyroid hormone levels were determined...
November 2011: British Journal of Nutrition
James E Haddow, Louis M Neveux, Glenn E Palomaki, Geralyn Lambert-Messerlian, Jacob A Canick, David G Grenache, Jun Lu
OBJECTIVE: Measure serum PTH and 25(OH)D in a cross-sectional sample of pregnant women at 11th through 13th weeks' gestation to examine vitamin D status and consider implications. DESIGN: Observational: we retrieved residual sera stored at -20 °C after routine first trimester Down's syndrome screening, distributed over 12 months. PATIENTS: 430 African American women and 586 Caucasian women. MEASUREMENTS: PTH and 25-hydroxy vitamin D [25(OH)D] immunoassays...
September 2011: Clinical Endocrinology
Arash Hossein-nezhad, Khadijeh Mirzaei, Zhila Maghbooli, Azam Najmafshar, Bagher Larijani
The aim of our study was to investigate the relationship between maternal and fetal bone turnover markers and folic acid supplementation during pregnancy. In an observational study performed in Tehran University of Medical Sciences related hospitals, 113 healthy pregnant women with gestational age between 8 and 12 weeks and aged between 15 and 42 years were recruited and followed until delivery time. The participants were divided into two groups; women who took 1 mg of folic acid daily supplement from the beginning of the pregnancy until the end of the second trimester entered into group I and women who choose to continue their daily intake of folic acid until the delivery time entered into group II...
March 2011: Journal of Bone and Mineral Metabolism
Laura Harkness, Barbara Cromer
This study aimed to investigate the relationship between 25-hydroxyvitamin D [25(OH)D)] and parathyroid hormone (PTH) levels in adolescent females residing in a northern climate. Concern regarding vitamin D status in this population is due to limited sunlight exposure in northern latitudes, decreased outdoor recreational activities, as well as decreased conversion in black girls from increased skin pigmentation. In this cross-sectional analysis, serum samples were assayed for 25(OH)D using competitive protein binding (CPB) assay and PTH with immuno-radiometric (RIA) procedures...
January 2005: Osteoporosis International
L Morfis, P Smerdely, L G Howes
BACKGROUND: An association between serum parathyroid hormone (PTH) levels in normotensive elderly subjects and blood pressure values had been reported. OBJECTIVE: To examine the relationship between PTH levels and other biochemical markers of calcium metabolism in elderly subjects and 24 h ambulatory blood pressures. METHODS: We performed 24 h ambulatory blood pressure recordings for 123 independent elderly subjects aged 63-88 years using a SpaceLabs 90207 recorder...
November 1997: Journal of Hypertension
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