Abstract:
:The whole-cell patch clamp technique was used to investigate the actions of the opioid agonist U50488H on Ca2+ and K+ currents in differentiated NG108-15 cells. U50488H (5-50 microM) caused a concentration-dependent, reversible inhibition of high voltage-activated Ca2+ currents which persisted in the presence of nifedipine (2 microM), indicating a blockade of N-type Ca2+ channels. The actions of U50488H were also observed in the presence of 30 microM naloxone, which fully abolished current inhibition caused by a selective delta opioid receptor agonist. U50488H also inhibited Ca(2+)-insensitive, voltage-gated K+ currents in NG108-15 cells in the presence of naloxone. Our results indicate that U50488H can inhibit neuronal ionic channels via a mechanism which does not involve activation of kappa opioid receptors.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Carpenter E,Gent JP,Peers Cdoi
10.1097/00001756-199607290-00024subject
Has Abstractpub_date
1996-07-29 00:00:00pages
1809-12issue
11eissn
0959-4965issn
1473-558Xjournal_volume
7pub_type
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