Active clinical trials for "Bone Diseases"

Cardiovascular disease (CVD) is the most frequent cause of death in patients (ptt.) with chronic kidney disease (CKD). Compared to the general population death due to CVD is 10-20 times higher in CKD ptt. being treated with hemodialysis. Vascular calcification and hence arterial stiffness is of great importance for the high incidence of CVD. CKD ptt. in dialysis treatment also have a 3 times higher risk of bone fractures. Both vertebral and other fractures of low energy are associated with a high mortality. Matrix Gla Protein (MGP) is an important inhibitor of vascular calcification and Osteocalcin (OC) is an important regulator of bone metabolism. The function of both MGP and OC depend on vitamin K. Vitamin K is supplied with food. The content is low in food recommended to CKD ptt. which is reflected in very low concentrations of vitamin K in their blood samples. A correlation between vitamin K level, incidence of vascular calcification and bone density has been proven; yet there are no trials elucidating the clinical effect of vitamin K on vascular calcification or bone strength. The investigators will conduct a randomized placebo controlled trial examining the clinical effects of vitamin K2 on vascular calcification and bone mineralization in order to prevent and treat CVD and bone disease in CKD ptt. Primary study endpoints: Changes in arterial stiffness assessed by pulse wave examination Changes in bone mineral density (BMD) in distal radius assessed by DXA-scans. Secondary study endpoints: Changes in coronary artery and valvular calcification assessed by heart-CT-scans, blood pressure, body composition, total and regional BMD, lateral column/aortic calcification score as well as a panel of correlating blood tests.

To evaluate in patients with chronic kidney disease the impact of two dosages of per os vitamin D3 supplementation (cholecalciferol) on large arterial stiffness (evaluated non invasively by pulse wave velocity and high-resolution echotracking system). We will also study arterial calcification (lateral abdominal radiography and echocardiogram), arterial remodeling (high-resolution echotracking system), endothelial function (evaluated by a non-invasive finger biosensor device), and bone remodeling (evaluated by serum biomarkers and bone mineral density).

This is a pilot randomized controlled trial aimed to evaluate the effect of teriparatide on the clinical course of hypocalcemia after parathyroidectomy for secondary hyperparathyroidism in dialysis-dependent patients.

The investigators are doing this study to look at how different doses of the Depot medroxyprogesterone acetate (DMPA) shot effect weight gain and bone mineral density in teens. The investigators hope that what the investigators learn from this study will be used to develop ways to keep girls from gaining weight or losing bone density when receiving DMPA.

The purpose of this study was to demonstrate that participants with Paget's disease of the bone who had responded to zoledronic acid treatment as participants in the core registration studies CZOL446K2304 and CZOL446K2305 and later experienced a relapse can be successfully treated with a 5 milligram (mg) infusion of zoledronic acid.

Acidosis (accumulation of acid in the body) may be an underrecognized problem in patients after renal transplantation. It may have consequences on physical performance due to negative effects on bone and muscle metabolism. Therefore, the purpose of this study is to determine the status of physical capacity and bone structure in renal transplant patients with metabolic acidosis to study the effect of substituting base equivalents (citrate) on acid/base status of renal transplant patients with acidosis to compare the status of physical capacity and bone structure in renal transplant patients with metabolic acidosis before and after substitution with citrate

Bone is lost rapidly and fractures occur in 10-20% of patients who receive organ transplants within 2 years. The purpose of this study is to evaluate long-term effects of a pamidronate-vitamin D-calcium regimen on bone loss, fractures, and safety in recipients of kidney and heart transplants.

18 F-fluoride Positron emission tomography (PET) is able to demonstrate and quantify the metabolic activity locally in the skeleton (1). This technique should, therefore, also be able to demonstrate a dramatic decrease in the metabolic activity in localized monostotic Paget's disease lesions after therapy. In this condition, indeed, the usual biological markers may be unhelpful to assess the efficacy of therapy, because they are usually comprised in the normal range for single pagetic localizations, even before therapy (2). The main purpose of this trial is to assess the early and long term response of pagetic bone to bisphosphonate therapy.

Skeletal buffering of chronic acid loads may contribute to a significant amount of bone loss over time. Evidence from a few small short-term studies suggests that basic compounds, namely potassium citrate and potassium bicarbonate may reduce bone loss and improve bone density. The purpose of this study is to evaluate the effects of potassium citrate on bone metabolism. We hypothesize that administration of potassium citrate to postmenopausal women with osteopenia will reduce bone resorption and improve bone mineral density. Postmenopausal women with osteopenia (T score between -1.0 and -2.5) and no history of fracture will be randomized to either daily potassium citrate or placebo for one year. Primary outcomes will be markers of bone turnover, which will be measured over 12 months. Secondary outcomes will be bone mineral density, compliance, and adverse events.

Adolescents and young adults with anorexia nervosa (AN) are at high risk for low bone mineral density at a time when healthy adolescents are rapidly accruing bone, with implications for peak bone mass and fracture risk in later life. They are also deficient in insulin-like growth factor 1 (IGF-1), the bone trophic factor made in the liver in response to growth hormone (GH), despite elevated levels of growth hormone. It is possible that deficiency of insulin-like growth factor 1, a hormone very important for the maintenance of skeletal integrity, may contribute to the severe osteopenia seen in anorexia nervosa. The physiologic effects of recombinant human insulin-like growth factor 1 (rhIGF-1) treatment in adolescents and young adults with anorexia nervosa have not been studied. The goal of this proposal is to investigate the effects of recombinant human insulin-like growth factor 1 on bone density and bone microarchitecture in adolescent girls and young adult women with anorexia nervosa over a 6 month period. We hypothesize that adolescent and young adult anorexia nervosa patients, being insulin-like growth factor 1 deficient, will respond to exogenously administered recombinant human insulin-like growth factor 1 with elevations in biochemical indices of bone turnover and an increase in bone density and improvement in bone structure, or maintain bone density (in contrast to the decrease in bone density expected in adolescent girls and women with anorexia nervosa who are not treated).