Abstract：
:By using acutely dissociated dorsal raphe nucleus neurons (DRN) from young mice, direct and anti-opioid effects of Neuropeptide FF (NPFF) receptors were measured. The NPFF analog 1 DMe (10 µM) had no effect on resting Ca2+ channels but reduced the magnitude of Ca2+ transients induced by depolarization in 83.3% neurons tested, of which the inhibition rate is 45.4±2.9%. Pertussis toxin treatment reduced to 18.9% the number of responding neurons and attenuated by 47% the response of 1 DMe. In contrast, cholera toxin treatment had no significant effect. Eighteen minute perfusion with 1 DMe at a very low 10 nM concentration, that did not directly inhibit Ca2+ transients triggered by depolarization in every neuron, attenuated by 78% the inhibitory effect of Nociceptin/orphanin FQ (N/OFQ) on Ca2+ transients, but not that of by serotonin. These results demonstrated for the first time that NPFF receptors on mice DRN inhibit Ca2+ transients induced by depolarization via Gi/o protein and also exhibit a specific anti-opioid activity on nociceptin receptors, and that their specific anti-opioid activity is not a direct consequence of their activity on Ca2+ transients.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Ding Z,Zajac JMdoi
10.1016/j.ejphar.2014.07.013subject
Has Abstractpub_date
2014-10-05 00:00:00pages
271-6eissn
0014-2999issn
1879-0712pii
S0014-2999(14)00550-0journal_volume
740pub_type
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