Pindolol increases extracellular 5-HT while inhibiting serotonergic neuronal activity.
Article Details
- CitationCopy to clipboard
Fornal CA, Martin FJ, Mendlin A, Metzler CW, Bjorvatn B, Jacobs BL
Pindolol increases extracellular 5-HT while inhibiting serotonergic neuronal activity.
Eur J Pharmacol. 1999 Jul 21;377(2-3):187-91. doi: 10.1016/s0014-2999(99)00430-6.
- PubMed ID
- 10456429 [ View in PubMed]
- Abstract
The effects of pindolol, a beta-adrenoceptor blocker/putative 5-hydroxytryptamine (5-HT)1A/1B antagonist, on both the single-unit activity of serotonergic neurons in the dorsal raphe nucleus (DRN) and extracellular 5-HT levels in the caudate nucleus, were examined in freely moving cats. Administration of (+)-pindolol (1 and 10 mg/kg, s.c.) decreased neuronal activity and increased 5-HT levels in a dose- and time-dependent manner. The subsequent administration of WAY-100635 [N-[2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl]-N-(2-pyridinyl)cycloh exanecarboxamide] (0.2 mg/kg, s.c.), a selective 5-HT1A receptor antagonist, blocked pindolol-induced neuronal suppression and potentiated 5-HT output. These results indicate that pindolol may be acting at the level of the nerve terminal to increase 5-HT.