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Modulation of [(35)S]GTPgammaS binding to chinese hamster ovary cell membranes by D(2(short)) dopamine receptors

Terasmaa, A; Finnman, U B; Owman, Christer LU ; Ferre, S; Fuxe, K and Rinken, A (2000) In Neuroscience Letters 280(2). p.135-138
Abstract
Rat dopamine D(2short) expressed in Chinese hamster ovary (CHO) cells were characterized by means of activation of [(35)S]-guanosine 5'-O-(gamma-thiotriphosphate) ([(35)S]GTPgammaS) binding and inhibition of [(3)H]raclopride binding. Among 18 dopaminergic ligands studied dopamine, NPA, apomorphine and quinpirole were full agonists in activation of [(35)S]GTPgammaS binding, while seven ligands were partial agonists with efficacies from 16 to 69% of the effect of dopamine and seven ligands were antagonists having no effect on the basal level of [(35)S]GTPgammaS binding, but inhibited dopamine-dependent activation in a dose-response manner. Despite the different efficacies, the potencies of all 18 ligands to modulate [(35)S]GTPgammaS binding... (More)
Rat dopamine D(2short) expressed in Chinese hamster ovary (CHO) cells were characterized by means of activation of [(35)S]-guanosine 5'-O-(gamma-thiotriphosphate) ([(35)S]GTPgammaS) binding and inhibition of [(3)H]raclopride binding. Among 18 dopaminergic ligands studied dopamine, NPA, apomorphine and quinpirole were full agonists in activation of [(35)S]GTPgammaS binding, while seven ligands were partial agonists with efficacies from 16 to 69% of the effect of dopamine and seven ligands were antagonists having no effect on the basal level of [(35)S]GTPgammaS binding, but inhibited dopamine-dependent activation in a dose-response manner. Despite the different efficacies, the potencies of all 18 ligands to modulate [(35)S]GTPgammaS binding revealed a good correlation with their potencies to inhibit [(3)H]raclopride binding in the CHO cell membranes. This indicates that the binding of the ligand to the receptor determines its potency, but has no direct correlation with its intrinsic activity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Neuroscience Letters
volume
280
issue
2
pages
135 - 138
publisher
Elsevier
external identifiers
  • pmid:10686396
  • scopus:0033621756
ISSN
0304-3940
DOI
10.1016/S0304-3940(00)00776-X
language
English
LU publication?
yes
id
568d8a02-d8a4-4e0b-a162-0f68d6429122 (old id 1117811)
date added to LUP
2008-06-25 08:38:47
date last changed
2017-01-01 05:08:31
@article{568d8a02-d8a4-4e0b-a162-0f68d6429122,
  abstract     = {Rat dopamine D(2short) expressed in Chinese hamster ovary (CHO) cells were characterized by means of activation of [(35)S]-guanosine 5'-O-(gamma-thiotriphosphate) ([(35)S]GTPgammaS) binding and inhibition of [(3)H]raclopride binding. Among 18 dopaminergic ligands studied dopamine, NPA, apomorphine and quinpirole were full agonists in activation of [(35)S]GTPgammaS binding, while seven ligands were partial agonists with efficacies from 16 to 69% of the effect of dopamine and seven ligands were antagonists having no effect on the basal level of [(35)S]GTPgammaS binding, but inhibited dopamine-dependent activation in a dose-response manner. Despite the different efficacies, the potencies of all 18 ligands to modulate [(35)S]GTPgammaS binding revealed a good correlation with their potencies to inhibit [(3)H]raclopride binding in the CHO cell membranes. This indicates that the binding of the ligand to the receptor determines its potency, but has no direct correlation with its intrinsic activity.},
  author       = {Terasmaa, A and Finnman, U B and Owman, Christer and Ferre, S and Fuxe, K and Rinken, A},
  issn         = {0304-3940},
  language     = {eng},
  number       = {2},
  pages        = {135--138},
  publisher    = {Elsevier},
  series       = {Neuroscience Letters},
  title        = {Modulation of [(35)S]GTPgammaS binding to chinese hamster ovary cell membranes by D(2(short)) dopamine receptors},
  url          = {http://dx.doi.org/10.1016/S0304-3940(00)00776-X},
  volume       = {280},
  year         = {2000},
}