Effect of tianeptine on the hypothalamic somatotropic
axis in the conscious sheep
by
Cataldi M, Magnan E, Guillaume V, Hery F,
Dutour A, Rettori MC, Kamoun A, Oliver C.
Laboratoire de Neuroendocrinologie Experimentale,
INSERM U 297, Institut Federatif Jean Roche,
Faculte de Medecine Nord, Marseille, France.
Eur J Pharmacol. 1994 Feb 21;253(1-2):149-53.

ABSTRACT

The action of serotonin on growth hormone (GH) secretion is controversial because of interspecies differences and lack of specificity of serotoninergic drugs. Serotonin (5-HT) appears to inhibit GH release in the sheep and in man. We have investigated the site of action of tianeptine, a 5-HT uptake enhancer, in sheep since it is possible to collect hypophysial portal blood for the simultaneous determination of growth hormone-releasing hormone (GHRH) and somatostatin in this species under conscious, unstressed conditions. Tianeptine injection (10 mg/kg i.v.) resulted in a significant, immediate and short-lasting (30 min) increase in peripheral GH (+750%; P < 0.01) and hypophysial portal GHRH (+180%; P < 0.01). No change in the secretion of somatostatin was recorded during the same time. These data suggest that serotoninergic inputs are inhibitory to GH secretion. Tianeptine acts centrally to stimulate GH secretion in the sheep and its effect is mediated through changes in GHRH but not somatostatin release into hypophysial portal blood.

EEG study
Metabolism
Long-term use
Pharmacodynamics
Serotonin/forebrain
Tianeptine (Stablon)
Tianeptine: structure
Neurochemical profile
Melancholic depression
Tinaneptine v amitriptyline
Pharmacokinetics in the elderly
Ethyl alcohol and tianeptine (Stablon)
Ultra-high dose psychostimulant effect
Tianeptine-induced serotonin uptake increase
Structure-activity relationships/tricyclic antidepressants
Antidepressant and selective serotonin reuptake enhancer

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