Bone Abstracts

Objective: To study association of VDR gene Fok1 polymorphism locus on bone mass accrual in adolescent girls.Methods: An intervention trial was carried out in 102 girls aged 8–16 years (Pune, India). All girls received 500 mg elemental calcium (daily) and 30 000 IU of vitamin D3 quarterly for 1 year. Outcome variables were measured at baseline and end of the year. Serum levels of ionised calcium (iCa), inorganic phosphorous, parathyroid hor...

Fibroblast growth factor-23 (FGF23) is a hormone originating from osteocytes with suppressive actions on renal phosphate reabsorption and vitamin D synthesis. We recently identified FGF23 as a calcium-conserving hormone, regulating the membrane transport of the epithelial calcium channel TRPV5 in distal renal tubules. Here, we analyzed the long term sequelae of Fgf23 deficiency and renal calcium wasting on bone and mineral metabolism in 9-month-old mice lacking both Fgf23<...

Arterial stiffness or pulse wave velocity (PWV) is increasingly recognized as a strong predictor of future cardiovascular events and all cause mortality. Literature date indicate a relationship between vitamin D (25-OHD) deficiency and arterial stiffness in isolated systolic hypertension (ISH), but it is still unclear how 25-OHD deficiency may contribute to functional changes of the arterial wall in hypertensive patients. This study aimed to evaluate the relationships between ...

Objective: Although obesity is a risk factor for vitamin D insufficiency, its impact on vitamin D-binding protein (DBP) concentration, and thereby possibly also on free 25OHD, is less well known. Our aim was to compare total and free serum 25OHD, and DBP concentrations between obese and normal-weight young adults at baseline, and their responses to cholecalciferol supplementation.Design: A 12 weeks’ randomized, double-blinded clinical trial.<p c...

Background: Vitamin D-dependent rickets type 1 (VDDR-1) is a rare autosomal recessive disorder caused by mutations in CYP27B1. This gene encodes the 1α-hydroxylase enzyme which converts 25-hydroxy vitamin D to the active form 1,25-dihydroxyvitamin D.Objective: To describe a case of VDDR-1due to a novel CYP27B1 mutation.Presenting problem: A 27-month-old female was admitted to the Pediatric Intensive Care Unit...

Introduction: Hypovitaminosis D is observed in several rheumatic autoimmune diseases, including systemic sclerosis (SSc); nevertheless, data concerning the possible determinants of reduced serum vitamin D levels in this disease are not fully investigated. The aim of this study is to evaluate the relationship between BMD, body mass composition, skin sclerosis, and serum vitamin D levels in two subsets of SSc patients.Patients and methods: 55 Post-menopaus...

Objectives: Adolescent idiopathic scoliosis (AIS) was associated with low bone mass which, apart from being an important health issue that could persist into adulthood, was also a significant prognostic factor for curve progression in AIS. We have performed a randomized controlled trial on whole-body vibration (WBV) and reported its effect on increasing femoral neck areal bone mineral density (aBMD) mainly at the dominant leg. The objective of this study was to evaluate the ro...

Objectives: Adolescent Idiopathic Scoliosis (AIS) is associated with low bone mass. This study aimed at evaluating the therapeutic effect and its determinants of Ca+Vit-D supplementation in improving bone strength and preventing curve progression in AIS.Methods: This was a randomized double-blinded placebo-controlled trial recruiting AIS girls (11–14 years old, Tanner stage<IV) with femoral neck BMDZ-scores<0 and Cobb angle≥15°. 3...

Background and objectives: The association between excess calcium intake and cardiovascular mortality has been reported, but the association has not yet been explored according to serum vitamin D status. Thus, we investigated the relation of dietary calcium intake and Framingham risk score (FRS) according to serum 25-hydroxyvitamin D (25(OH)D) status.Methods: A total of 7809 subjects (3452 males and 4357 female) aged over 40 years from the data of the Ko...

Aim: Evaluate the differences with densitometry after 2-year treatment in patients with breast cancer and LBMD.Materials and methods: A 2 year duration longitudinal study was done in patients diagnosed with breast cancer sent to the Rheumatology Osteoporosis Unit in Hospital d’Ontinyent, who required supplements of calcium and vitamin D+bisphosphonates after a risk fracture study. Socio-demographic data, breast tumor characteristics, risk f...