View clinical trials related to Bone Loss.
Filter by:With the increasing age of people living with HIV/AIDS, age-induced osteoporosis is likely to be compounded by HIV/AIDS and HAART-associated bone loss. Mechanistically, osteoclasts the cells responsible for bone resorption form under the influence of the key osteoclastogenic cytokine receptor activator of nuclear factor kappa-Β ligand (RANKL). The osteoclastogenic and proresorptive activities of RANKL are moderated by its physiological decoy receptor osteoprotegerin (OPG). Imbalance in the ratio of RANKL to OPG alters osteoclastic bone resorption and lead to osteoporosis. Activated T- and B-cells are a major source of RANKL, while normal physiological B-cells are a major source of OPG. T-cells regulate the production of OPG by B-cells. Thus changes in the immune system induced by HIV/AIDS and/or by HAART could affect B-cell and T-cells RANKL and OPG production. Indeed, data from our group shows that in an animal model of HIV/AIDS, the HIV-1 Transgenic rat, the development of osteoporosis is recapitulated as observed in HIV-infected patients, and B-cell OPG and RANKL production are concurrently down regulated and upregulated respectively. Furthermore, preliminary data in HIV-infected subjects suggests dramatic acute upswing in bone resorption following HAART initiation that peaks at 12 weeks and then declines. Based on these findings, the investigators hypothesize HAART associated bone loss is driven by immune reconstitution. Because this effect of HAART is dramatic in magnitude but short in duration, the investigators propose to apply antiresorptive agent (zoledronic acid, reclast®) to specifically spare patients from this dramatic but acute bone damage.
Spinal cord injury (SCI) results in marked acute loss of bone. This study evaluates the effect of teriparatide (PTH) and the use of vibration as a form of mechanical stimulation on bone mass.
Women's evermore presence in professional and athletic sports has revealed sound evidence on the existence of female athlete triad among the world's elite female athletes. This triad consists of eating disorders, amenorrhea and osteoporosis. It has been stated that all female athletes are potentially at risk, but it is not clear to what extent those exercising at different levels are at risk of this syndrome/triad. Since the manifestation of this triad is often denied, or under-reported, appropriate screening methods are required to identify the symptoms. There is still no clear-cut information available on the incidence of this triad in Iran. And there are religious and cultural differences between Iran's elite female athletes and those in other countries. Therefore, in order to meet Iranian female athletes' needs, the investigators decided to determine the frequency of the female athlete triad in Iran.
Study to Characterize the Safety, Pharmacokinetics, and Pharmacodynamics of CEP-37251 in Healthy Postmenopausal Women.
The purpose of the study is to evaluate the effect of an aerobic-resistance exercise program compared to a home based physical activity program on bone mass, body composition, metabolic risk factors and cardiovascular fitness in women with cancer who have completed therapy.
The objective of this study is to assess changes bone mineral density and bone metabolism after laparoscopic Roux-en-Y gastric bypass surgery. The investigators hypothesize that weight loss after laparoscopic Roux-en-Y gastric bypass surgery will be associated with increased bone turnover, changes in bone metabolism, and loss of bone mass.
The purpose of the study was to test a clinically relevant non-inferiority of Straumann BoneCeramic treatment compared to Bio-Oss treatment 180 to 240 days after sinus grafting procedure.
The purpose of this study is to compare a new biomaterial with an already existing treatment principle (Bio-Oss/Bio-Gide) with regard to their ability to preserve the dimensions of the alveolar ridge and to promote bone regeneration and to evaluate the early survival rate of dental implants placed in the augmented socket area and to assess radiographically and clinically changes of peri-implant soft and hard tissues.
Study Design: (e.g., Controlled, Double-Blind, Randomized, Parallel): Randomized, double-blind, placebo controlled of a bisphosphonate in the prevention of bone loss associated with the use of antiepileptic drugs.
This is a double-blind, randomized, placebo-controlled trial of zoledronic acid, 5mg, to be administered intravenously to people who have suffered an acute spinal cord fracture. The goal is to evaluate if zoledronic acid can prevent the acute bone loss seen in this population. Outcome measures will include bone density determinations over a one year period.