Abstract
The objective of this study was to investigate changes in the hypothalamic-pituitary-adrenal (HPA) axis after recombinant human growth hormone (rhGH) therapy. Subjects included children with growth hormone deficiency (GHD). We conducted a multicenter, retrospective study that assessed 72 GHD patients treated with rhGH during 6 months. Patients were classified into two groups: isolated GHD (IGHD; n=20) and multiple pituitary hormone deficiencies (MPHD; n=52). The HPA axis and other hormones were evaluated at baseline and every 3 months. In the MPHD group, 32 patients had adrenocorticotrophic hormone deficiency and received hydrocortisone before rhGH therapy. In the other 20/52 MPHD patients, the cortisol (COR) level was significantly reduced after rhGH therapy. Moreover, 10 patients showed low COR levels. In the IGHD group, COR levels also decreased, but remained within the normal range. During rhGH therapy, COR levels were reduced, particularly in patients with MPHD. HPA axis should be monitored during rhGH therapy.
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