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Research Article

Human growth hormone prevents the protein catabolic side effects of prednisone in humans.

F F Horber and M W Haymond

Department of Pediatrics, Mayo Clinic, Rochester, Minnesota 55905.

Published July 1990

Prednisone treatment causes protein wasting and adds additional risks to a patient, whereas human growth hormone (hGH) treatment causes positive nitrogen balance. To determine whether concomitant administration of hGH prevents the protein catabolic effects of prednisone, four groups of eight healthy volunteers each were studied using isotope dilution and nitrogen balance techniques after 7 d of placebo, hGH alone (0.1, prednisone alone (0.8, or prednisone plus hGH (n = 8 in each group). Whether protein balance was calculated from the leucine kinetic data or nitrogen balance values, prednisone alone induced protein wasting (P less than 0.001), whereas hGH alone resulted in positive (P less than 0.001) protein balance, when compared to the placebo-treated subjects. When hGH was added to prednisone therapy, the glucocorticoid-induced protein catabolism was prevented. Using leucine kinetic data, negative protein balance during prednisone was due to increased (P less than 0.05) proteolysis, whereas hGH had no effect on proteolysis and increased (P less than 0.01) whole body protein synthesis. During combined treatment, estimates of proteolysis and protein synthesis were similar to those observed in the placebo treated control group. In conclusion, human growth hormone may have a distinct role in preventing the protein losses associated with the administration of pharmacologic doses of glucocorticosteroids in humans.

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