Abstract:
:Calcitonin can selectively modulate the effects of opioids on the rat hypothalamic-pituitary-adrenal axis and increase the release of corticosterone induced by a kappa-opioid receptor agonist. Considerable evidence supports the involvement of opioid and serotonergic systems in the analgesic effect of calcitonin. In this study, the involvement of hypothalamic serotonergic pathways in the calcitonin potentiation of the effect of (trans-(+/-)-3,4-dichloro-N-methyl-N-[2-(1-pyrrolidinyl) cyclohexyl]-benzeneacetamide methane sulphonate (U-50,488H) on the secretion of corticosterone was examined. The correlation between the calcitonin-induced potentiation of the pituitary adrenal response to U-50,488H and changes in serotonin turnover was evaluated. Our results show that the increase in the release of corticosterone induced by treatment with calcitonin + U-50,488H was not evident when the turnover of serotonin was decreased by inhibition of its synthesis with m-hydroxybenzylhydrazine (NSD 1015) or by blockade of its metabolism with trans-2-phenylcyclopropylamine (tranylcypromine). Although other factors can not be discarded, from the present data it can be suggested that the serotonergic system plays an important role in the interaction calcitonin-kappa-opioid receptor agonist in the hypothalamic-pituitary-adrenal axis.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Ormazábal MJ,Milanés MV,Martín MIdoi
10.1016/s0014-2999(97)01355-1subject
Has Abstractpub_date
1997-12-04 00:00:00pages
81-7issue
1eissn
0014-2999issn
1879-0712pii
S0014-2999(97)01355-1journal_volume
340pub_type
杂志文章abstract::We studied the effects of the tyrosine kinase inhibitors genistein and tyrphostin and the tyrosine phosphatase inhibitors sodium orthovanadate and phenylarsine oxide on endotoxin-mediated induction of nitric oxide (NO) synthase in rat aorta and its effects on vascular contractility. Genistein (i.p. 10 mg/kg) inhibited...
journal_title:European journal of pharmacology
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abstract::The origin of the thrombocytopenia and leucopenia induced by protamine-heparin complexes is unknown. We studied the biochemical and cellular effects of protamine (6 mg x kg-1, i.v.) injected after heparin (5 mg x kg-1, i.v.) in New Zealand rabbits. After protamine injection (0.5 min) increases in blood platelet-activa...
journal_title:European journal of pharmacology
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abstract::After incubation of rat cortical cell cultures with the human immunodeficiency virus type 1 (HIV-1) coat protein gp120 for 12 h, cells showed fragmentation of DNA at internucleosomal linkers, the characteristic feature of apoptosis. In a quantitative approach, it was determined that the percentage of DNA fragmentation...
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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