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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Effects of raloxifene and alendronate on bone turnover as assessed by procollagen type I N-terminal propeptide.

Raloxifene decreases PINP into the lower half of the premenopausal reference interval; alendronate decreases PINP more, with approximately 60% of alendronate-treated women having PINP concentrations below the lower limit of the premenopausal reference interval. INTRODUCTION: The purpose of this study was to evaluate the distribution of serum procollagen type I N-terminal propeptide (PINP) concentrations in women with postmenopausal osteoporosis prior to treatment and after treatment with either raloxifene or alendronate for 12 or more months. METHODS: Included were data from 1,323 postmenopausal women aged 45 to 87 years, collected at baseline or after treatment with either alendronate 10 mg/day or raloxifene 60 mg/day. These patients had participated in one of four clinical trials in which intact PINP was measured by radioimmunoassay (Orion Diagnostica). A premenopausal reference interval from 16.0 to 75.8 μg/L was determined from 68 premenopausal, non-pregnant women. RESULTS: Most postmenopausal osteoporotic patients prior to treatment had PINP values in the upper half of the premenopausal reference interval at baseline (70%). After ≥12 months of therapy, most patients who received raloxifene had PINP concentrations in the lower half of the premenopausal reference interval (58%), whereas among those who received alendronate, around 60% of patients had PINP concentrations below the lower limit of the premenopausal reference interval. CONCLUSION: PINP may be useful for assessing differences in bone turnover response to different types of anti-resorptive therapy.[1]

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