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- W2106756976 abstract "Osteoporosis in men poses a unique therapeutic challenge. Clinical studies have focused largely on the more prevalent problem of post-menopausal osteoporosis, with few gender-specific studies exploring treatment options in men. Idiopathic osteoporosis in middle-aged men presents an additional dilemma, because in the majority of patients it is a low bone turnover state for which there are currently no available anabolic agents. We conducted an 18-month randomized, double blind, placebo-controlled trial of 23 men with idiopathic osteoporosis, 30-68 yr old (mean age +/- SEM, 50 +/- 1.9 yr). All patients received 1,500 mg calcium and 400 IU vitamin D daily. Ten patients were randomized to receive 400 IU PTH-(1-34), and 13 patients received vehicle, administered by daily sc injection. Serum and urinary biochemistries, including markers of bone turnover were measured every 3 months. Bone densitometry of the lumbar spine, hip, and radius was performed every 6 months. PTH-(1-34) was associated with a marked 13.5% increase in bone mass at the lumbar spine, whereas that in the control group did not change (P < 0.001). The mean lumbar spine T-score improved from -3.5 +/- 0.2 to 2.4 +/- 0.4. Femoral neck bone mineral density in the PTH-treated group increased 2.9% (P < 0.05). The 1/3 site of the distal radius showed no change from baseline in the PTH-treated group. There were no significant changes in serum calcium concentration, 24-h urinary calcium excretion, or 1,25-dihydroxyvitamin D in either group. All markers of bone turnover increased in the PTH-treated patients, with the greatest changes in serum osteocalcin and urinary N-telopeptide (230% and 375% above baseline by 12 months, respectively; P < 0.001). Free pyridinoline and markers of bone formation that showed little correlation with each other at baseline, became highly correlated in the PTH-treated group (r = 0.1; P = 0.29 at baseline; to r = 0.7; P < 0.0001 at 18 months), a pattern absent in the control patients. The best predictor of the lumbar spine response to PTH at 18 months was the combination of pyridinoline at baseline and osteocalcin at 3 months (70% of the variance). PTH is a potent stimulator of skeletal dynamics in men with idiopathic, low turnover osteoporosis; is associated with substantial increases in lumbar spine and hip bone density; and may prove to be an efficacious anabolic agent in men with this disorder." @default.
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- W2106756976 date "2000-09-01" @default.
- W2106756976 modified "2023-10-18" @default.
- W2106756976 title "Parathyroid Hormone as a Therapy for Idiopathic Osteoporosis in Men: Effects on Bone Mineral Density and Bone Markers<sup>1</sup>" @default.
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- W2106756976 doi "https://doi.org/10.1210/jcem.85.9.6818" @default.
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