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  • Journal
    Summary: This journal features papers that use concepts and methods from evolutionary biology to address biological questions of health, social and economic relevance. Papers make contributions to different disciplines, including: agriculture, aquaculture, biotechnology, conservation biology, disease biology, evolutionary medicine, invasion biology, fisheries and wildlife management.
    Digital Access
    Provider
    Version
    Wiley
    v. 1-, 2008-
    PubMed Central
    v. 1-, 2008-
  • Article
    Ruch W, Mixter RC, Russell RM, Garcia JF, Gale CC.
    Am J Physiol. 1977 Jul;233(1):E61-9.
    In conscious cats intravenous infusion of L-dopa (20 mg/kg) increased plasma growth hormone (GH), hydrocorticosterone (17-OHCS), and glucose while lowering midbrain (core) temperature (Tmb). Peripheral blockade of aromatic amino acid decarboxylase by L-alpha-hydrazino-methyldopa (MK 486) abolished only L-dopa hyperglycemia, indicating CNS stimulation by de novo catecholamines caused endocrine and temperature changes. Phenoxybenzamine but not pimozide pre-treatment abolished GH release after L-dopa. Apomorphine infusion alone did not alter basal GH. These data indicate central alpha-adrenergic mediation of GH release. Norepinephrine (NE) injected (5 or 10 microgram) into the preoptic anterior hypothalamus (POAH) (7 of 10 cases) and medial hypothalamus (17 of 30) raised GH while lowering Tmb, in agreement with alpha-adrenergic mediation. Responsive sites were distributed in ventral and dorsal medial hypothalamus and extended into the thalamus. Cooling of the POAH by implanted thermode raised GH in association with shivering, vasoconstriction, and rise in Tmb. Correlation between GH release and change in Tmb after L-dopa, central NE injection, and POAH cooling suggests hypothalamic integration of GH release with thermoregulation. Intravenous infusion of 5-hydroxytryptophan after MK 486 raised GH and 17-OHCS, suggesting serotonergic mechanisms also control GH and ACTH.
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