Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P61278 (somatostatin)
 22,083 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

gamma-Aminobutyric acid (GABA; 50 or 500 microgram/10 microliter) was injected into the right lateral ventricle of urethane- or pentobarbital-anesthetized male rats. The animals were decapitated 15 min after injection. Serum GH and hypothalamic somatostatin (SRIF) concentration were measured by specific RIAs. Intraventricular GABA caused a dose-related increase in GH and SRIF. In another study, aminooxyacetic acid (5 or 20 mg) was injected ip into urethane-anesthetized rats. Aminooxyacetic acid at 20 mg produced a significant increase in both serum GH and hypothalamic SRIF. Furthermore, 12.5 mg gamma-hydroxybutyric acid (GHB) injected ip into urethane- or pentobarbital-anesthetized rats elicited a significant increase in both serum GH and hypothalamic SRIF. Pretreatment with 20 mg L-dopa produced decreases in the GHB-induced serum GH increase and in hypothalamic SRIF in pentobarbital-anesthetized rats. These results show that GABA and GHB stimulated GH secretion, which was accompanied by increased hypothalamic SRIF. Thus, the GH release induced by GABA or GHB may be partly involved in inhibiting the release of hypothalamic SRIF. As the GHB-induced GH release was inhibited by L-dopa, the stimulatory effect of GHB on GH secretion might be mediated by inhibition of the dopaminergic mechanism.
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PMID:Concomitant increases in serum growth hormone and hypothalamic somatostatin in rats after injection of gamma-aminobutyric acid, aminooxyacetic acid, or gamma-hydroxybutyric acid. 734 64

In order to establish whether long-term abstinence from alcohol reverses the defective serotonergic and GABAergic controls of growth hormone (GH) secretion affecting alcoholic patients, the 5-HT1D serotonergic receptor agonist sumatriptan and the GABAergic agent gamma-hydroxybutyric acid (GHB) were administered to 12 normal men (32-49 years) and 22 non-depressed male alcoholic subjects (38-52 years) after 1-2 years of abstinence from alcohol. All subjects were also tested with placebos. Furthermore, tests with GH-releasing hormone (GHRH) and L-arginine (which releases GH from somatostatin inhibition) were performed to determine whether GH secretion in response to its major determinants is preserved in alcoholics. Administration of placebo did not change plasma GH levels in any subject. Similar GH responses were observed in normal controls and alcoholic subjects when GHRH or arginine were administered. A significant GH increase was observed in normal controls after sumatriptan or GHB injection; in contrast, GH secretion was not modified by sumatriptan or GHB administration in alcoholic patients. These data show a persistent selective loss of 5-HT1D receptor and GHB-mediated neurotransmissions in alcoholics that a long-term abstinence from alcohol is unable to restore.
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PMID:Persistence of defective serotonergic and GABAergic controls of growth hormone secretion in long-term abstinent alcoholics. 913 96