Effects of thiazolidinediones on bone loss and fracture
Abstract
OBJECTIVE: To examine the evidence regarding the effects of thiazolidinediones on bone loss and fracture.
DATA SOURCES: Published studies assessing the effects of thiazolidinediones on bone and/or fracture risk in humans were selected for review. A MEDLINE (1950-April 2007) and International Pharmaceutical Abstracts (1970-April 2007) search was performed. Search terms included thiazolidinediones, rosiglitazone, pioglitazone, troglitazone, bone, bone mineral density, fracture, and osteoporosis.
STUDY SELECTION AND DATA EXTRACTION: The literature search retrieved 5 English-language studies evaluating the effects of thiazolidinediones on bone in humans. These consisted of 2 small, uncontrolled studies using troglitazone; 1 prospective, randomized controlled study and 1 retrospective cohort study using rosiglitazone; and a post hoc analysis of an observational cohort study in subjects taking various thiazolidinediones. All of the studies assessed markers of bone metabolism and/or bone mineral density (BMD). No studies were identified that addressed rate of fractures in subjects taking thiazolidinediones.
DATA SYNTHESIS: The first troglitazone study demonstrated a decrease in levels of bone formation markers (10%; p < 0.05) and resorption markers (12%; p < 0.01), and authors determined that troglitazone produces a protective effect on bone through decreased bone turnover. The second troglitazone study did not demonstrate a significant change in BMD or levels of bone turnover…
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