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Retraction Rapid increase in bone mineral density in a child with osteoporosis and autoimmune hypoparathyroidism treated with PTH 1-34. 2001
Koch CA. · Pediatric and Reproductive Endocrinology Branch, National Institute of Child Health and Human Development; National Institutes of Health, Building 10, Bethesda, MD 20892, U.S.A. · Exp Clin Endocrinol Diabetes. · Pubmed #11571675 No free full text.
Abstract: We describe a 16-year-old girl with autoimmune polyglandular syndrome type 1 including hypoparathyroidism, who had osteoporosis that improved rapidly with parathyroid hormone replacement therapy. Patients with hypoparathyroidism usually have high bone mass. Our patient developed vertebral compression fractures at age 10, shortly after hypoparathyroidism was diagnosed. She continued to have low lumbar bone mass until age 16, when a dual energy x-ray absorptiometry (DEXA) revealed a Z score of - 2.2 SD. Several factors including decreased physical activity, total body magnesium depletion, and intermittent ketoconazole and short-term prednisone treatment, may have contributed to the development and progression of osteoporosis. Therapy with synthetic human parathyroid hormone (PTH) 1-34 rapidly normalized lumbar bone mass, as assessed by DEXA.
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Retraction A randomized clinical trial of the effects of isosorbide mononitrate on bone formation and resorption in post-menopausal women: a pilot study. free! 2006
Nabhan AF. · Department of Obstetrics & Gynecology, Ain Shams University, Cairo, Egypt. · Hum Reprod. · Pubmed #16410328 links to free full text
Abstract: BACKGROUND: Nitric oxide (NO) stimulates bone formation and inhibits bone resorption in vitro. NO donors (nitrates) are inexpensive and widely available, but their value for post-menopausal osteoporosis has never been evaluated in a randomized trial. The objective of this study was to compare the effects of 5 and 20 mg of isosorbide mononitrate (ISMO) on markers of bone turnover in post-menopausal women. METHODS: A prospective randomized trial was carried out in the Department of Obstetrics & Gynecology, Ain Shams University, Egypt. The study included 50 healthy post-menopausal women with a hip bone mineral density T score between 0 and -2.5. Participants were randomly assigned to 5 or 20 mg/day of ISMO for 12 weeks. Urine N-telopeptide (NTx), a marker of bone resorption, and serum bone-specific alkaline phosphatase (BSALP), a marker of bone formation, were measured. Markers were measured immediately before randomization and after 12 weeks of treatment. The percent change in NTx and BSALP for each of the treatment groups (5 mg ISMO and 20 mg ISMO) was calculated. The main outcome measures were serum NTx and BSALP in the 5 and 20 mg ISMO groups after 12 weeks of treatment. RESULTS: Women adhering to 20 mg of ISMO had a 42.03% (95% confidence interval (CI), 20.1-73.7) reduction in NTx and a 29.05% (95% CI, 10.8-48.4) increase in BSALP, and women adhering to 5 mg of ISMO had a 31.12% (95% CI, 8.3-68.2) reduction in NTx and a 28.4% (95% CI, 4.6-52.1) increase in BSALP. CONCLUSION: ISMO, as a NO donor, may be useful for the prevention of post-menopausal osteoporosis.
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