Efficacy of Pioglitazone on Bone Metabolism in Postmenopausal Women With Impaired Fasting Glucose.
The purpose of this study is to evaluate the effect of pioglitazone on bone metabolism in postmenopausal women with impaired fasting glucose.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
|Official Title:||A Phase 4, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Effect of Pioglitazone Compared to Placebo on Bone Metabolism in Impaired Fasting Glucose, Postmenopausal Women for One Year of Treatment|
- Percent Change From Baseline to Month 12 in Bone Mineral Density in the Total Proximal Femur by Dual-Energy-Ray Absorptiometry (DXA) [ Time Frame: Baseline and Month 12. ] [ Designated as safety issue: No ]The change in bone mineral density in the total proximal femur at month 12 relative to baseline. DXA is a means of measuring BMD through x-ray.
- Percent Change From Month 12 to Month 18 in Bone Mineral Density in the Total Proximal Femur by DXA [ Time Frame: Month 12 and Month 18. ] [ Designated as safety issue: No ]The change in bone mineral density in the total proximal femur at month 18 relative to month 12. DXA is a means of measuring BMD through x-ray.
|Study Start Date:||May 2008|
|Study Completion Date:||February 2011|
|Primary Completion Date:||January 2011 (Final data collection date for primary outcome measure)|
Pioglitazone 30 mg, tablets, orally, once daily for 4 weeks, then increased to Pioglitazone 45 mg, tablets, orally, once daily for up to 48 weeks.
Other Name: ACTOS®
|Placebo Comparator: Placebo||
Pioglitazone placebo-matching tablets, orally, once daily for up to 52 weeks.
Other Name: ACTOS®
The World Health Organization has estimated that 30% of all women aged over 50 years (postmenopausal) have osteoporosis according to a definition of Bone Mineral Density at any site being more than 2.5 standard deviations below the mean for young healthy adult women.
A known risk factor for development of osteoporosis and fracture is diabetes mellitus, with correlations to duration of disease and poor glycemic control.
Pioglitazone is a thiazolidinedione developed by Takeda Pharmaceuticals for the treatment of type 2 diabetes. Preclinical studies to date on the bone effects of thiazolidinediones have not clearly identified a mechanism of bone loss. While there is evidence of increased bone fractures in postmenopausal diabetic females treated with a thiazolidinedione, the mechanism is not known. Initial studies with thiazolidinediones in humans have focused on short term exposure (12 to 14 weeks) and non-diabetic females. These studies have shown acute changes in circulating bone markers and bone density, but have been questioned because they may not represent bone metabolism in states of abnormal glucose metabolism. Impaired glucose tolerance has been identified not only as a risk factor for developing type 2 diabetes, but also at higher risk for known complications of diabetes. Examination of the effect of thiazolidinediones on bone metabolism in IGT patients will provide data in patients with abnormal glucose tolerance, but without the potential confounding effects of oral hypoglycemic medications to treat type 2 diabetes.
The primary objective of this study is to evaluate the effect of pioglitazone on bone mass and metabolism in postmenopausal women with impaired fasting glucose or impaired glucose tolerance. Total participation time in this study is approximately 1 year and six months.
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|Study Director:||VP Clinical Science Strategy||Takeda|