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  • Title: Clonidine stimulation in anorexia nervosa: growth hormone, cortisol, and beta-endorphin responses.
    Author: Brambilla F, Lampertico M, Sali L, Cavagnini F, Invitti C, Maggioni M, Candolfi C, Panerai AE, Müller EE.
    Journal: Psychiatry Res; 1987 Jan; 20(1):19-31. PubMed ID: 2951760.
    Abstract:
    Clinical and biochemical findings link anorexia nervosa (AN) and primary effective disorders (PAD). Clonidine, an alpha 2-adrenoceptor agonist, has been shown to blunt growth hormone (GH) response and greatly lower plasma cortisol in PAD patients. We examined the GH, cortisol, and beta-endorphin (beta-EP) responses to an acute clonidine challenge (150 micrograms i.v. as a bolus) before and after 30 days of treatment with desmethylimipramine in 14 women with AN. Both before and after treatment, the AN patients showed normal plasma GH and cortisol responses, but an increased plasma beta-EP response. The increased beta-EP response in AN was independent of weight and depressive symptomatology. Our data indicate that alpha 2-adrenoceptors involved in the control of GH and adrenocorticotropic hormone are not altered in AN. The increased beta-EP response may indicate elevated opioid activity in the hypothalamo-pituitary system of AN patients.
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