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  • Title: Sex steroids, biochemical markers, bone mineral density and histomorphometry in male osteoporosis patients.
    Author: Fassbender WJ, Balli M, Görtz B, Hinrichs B, Kaiser HE, Tracke HS.
    Journal: In Vivo; 2000; 14(5):611-8. PubMed ID: 11125545.
    Abstract:
    The present study investigates the role of sex steroids, especially serum estradiol and serum testosterone in male osteoporosis patients and their association to established markers of bone turnover as also to BMD results and histomorphometric findings. Included were patients with secondary osteoporosis due to steroid medication, anticonvulsive medication and alcohol consumption, and heavy smoking patients. 100 males aged from 30 to 78 years were investigated for osteodensitometry (DEXA) and assessment of biochemical bone turnover markers (venous blood samples, 24 hour urine samples). In 40 of these patients bone biopsies were taken for histomorphometry. Laboratory investigations were made for serum Ca, P, parathyroid hormone (PTH), osteocalcin (OC), carboxyterminal extension peptide of type I procollagen (PICP), bone specific alkaline phosphatase (B-ALP), 25OH-vit.D, testosterone, estradiol, gonadotropines, and deoxypyridinoline and hydroxyproline from 24-hour urinary collection. Regions of interest for osteodensitometry with DEXA technique were the lumbar spine L1-L4 and the femoral neck (Ward's triangle). All of the patients examined had low bone mineral density (BMD) values compared to age- and sex-matched controls. Results from descriptive statistics showed hypogonadism in 26.4%, 25 OH-vitamin D deficiency in 26.2% and high serum estradiol in 59.1% of patients, compared to age- and sex-matched controls. 8.5% had elevated PTH levels. Multivariate analysis of data showed no significant correlation between BMD and semiquantitative histomorphometric findings (scaled from 1-5), neither a significant correlation between serum testosterone/estradiol and BMD. A significant correlation was observed between testosterone and estradiol values (r = 0.389, p = 0.008), and between OC and BMD results at ward's triangle (p = 0.008). In steroid treated patients (n = 12) significant differences were found for PTH (P < 0.01), 25 OH-Vit.D (p < 0.05) and urinary deoxypyridinoline (p < 0.05) as compared with the other patient group (n = 88). In summary we found high serum estradiol in 59.1% of our patients collective with low BMD, there was no correlation between BMD and histomorphometric findings. We observe a significant positive correlation between testosterone and estradiol values, but we did not find any association to bone turnover markers or BMD results.
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