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- W2137204745 abstract "A low bone mass in adults with childhood-onset GH deficiency (GHD) is likely to be caused by deficient bone accretion during childhood and early adulthood, whereas a decreased bone mass in patients with adult-onset GHD is likely to be caused by an imbalance in bone remodeling. Data on bone mineral density (BMD) and biochemical parameters of bone metabolism and data on response of these parameters to treatment with GH are scarce in patients with adult-onset GHD. It has been suggested that in patients with GHD, GH at the relatively high dose originally used may have beneficial effects on the skeleton. To address the question as whether lower, more physiological doses would have similar effects on the skeleton, we studied 47 patients with adult-onset GHD (27 women and 20 men, range 26–70 yr) randomized to receive one of three recombinant human GH (rhGH) dose regimens: 0.6 IU/day, 1.2 IU/day, or 1.8 IU/day as part of a study examining optimal GH dose replacement therapy. After 24 weeks of treatment, the dose of rhGH was individually adjusted to maintain the concentration of serum insulin growth factor-I within the normal laboratory reference range. Biochemical parameters of bone metabolism were measured at baseline and after 24 and 52 weeks and 2 yr of treatment. BMD of the lumbar spine was measured at baseline and after 52 weeks and 2 yr of treatment. Parameters of bone metabolism generally fell within the low-normal range and increased in a dose-dependent manner at 24 weeks of treatment. Between 24 and 52 weeks of rhGH treatment, mean serum osteocalcin levels and alkaline phosphatase activity further increased, whereas mean 24-h urine hydroxyproline/creatinine and N-telopeptide/creatinine excretion remained unchanged. After 52 weeks of treatment, serum alkaline phosphatase activity and 24-h urine hydroxyproline/creatinine excretion decreased, although not to pretreatment levels. Mean BMD at the lumbar spine (Z-score) was normal at baseline (−0.20 ± 0.16) and increased during treatment (at 2 yr of treatment: 0 ± 0.20; P < 0.005). Our data suggest that a low physiological dose of rhGH, individually adjusted to maintain serum insulin-like growth factor I levels within the normal laboratory reference range, increased bone turnover in favor of bone formation, as suggested by the significant, albeit small increase in BMD observed after 2 yr of treatment. Further studies are required to establish whether in patients with adult-onset GHD the preservation and/or increase in bone mass observed with the use of physiological doses of rhGH could be maintained with longer-term treatment." @default.
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- W2137204745 date "1998-06-01" @default.
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- W2137204745 title "Skeletal Effects of Two Years of Treatment with Low Physiological Doses of Recombinant Human Growth Hormone (GH) in Patients with Adult-Onset GH Deficiency1" @default.
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- W2137204745 doi "https://doi.org/10.1210/jcem.83.6.4851" @default.
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