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  • Title: Plasma somatomedin activity and urinary hydroxyproline excretion during administration of human growth hormone in children with short stature. Short-term effects.
    Author: Wit JM, Van den Brande JL.
    Journal: Horm Res; 1984; 19(4):205-15. PubMed ID: 6745841.
    Abstract:
    15 prepubertal children with short stature and varying peak growth hormone (GH) levels were given daily injections of increasing doses of human growth hormone (hGH) for consecutive periods of 7 days. Somatomedin activity (SM-act) and total urinary hydroxyproline excretion (THP) were determined in each period. In patients with a varying degree of GH deficiency, but without non-pituitary dependent abnormalities, there was a high correlation between basal SM-act and height velocity. Patients with catch-up growth had an unproportionally low SM-act and the Prader-Willi and transient Cushing patients had an unproportionally high one. All patients showed increases of SM-act and THP on hGH administration, but there was considerable variation of the shape of the curve and of the amplitude of the response. 3 1/2 days after the last injection, SM-act was back to basal level. There was a good correlation between weight-for-height and SM-act during the first two hGH doses, which fits the hypothesis of GH and insulin synergism on SM generation.
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