Abstract:
:We have assessed the utility of the Cytosensor microphysiometer for studying the pharmacology of recombinant CRF receptors. Chinese hamster ovary cells stably expressing the human CRF1 or CRF2 receptor were perfused in the Cytosensor with bicarbonate-free Hams F12 (pH 7.4) containing 0.2% bovine serum albumin. The rank order of potencies of agonist peptides were CRF = sauvagine = urocortin = urotensin at CRF1 (pEC50 values 11.16 +/- 0.17, 11.37 +/- 0.14, 11.43 +/- 0.09 and 11.46 +/- 0.13; n = 4), and urocortin = sauvagine > urotensin > CRF at CRF2 (pEC50 values 10.88 +/- 0.12, 10.44 +/- 0.05, 9.36 +/- 0.12 and 8.53 +/- 0.07; n = 7-9). alpha-Helical CRF (9-41) was a competitive antagonist at the CRF2 receptor (pK(B) = 6.99 +/- 0.08, n = 4), but was a partial agonist at the CRF1 receptor (pEC50 = 6.85 +/- 0.08, Emax = 33%, n = 3). CP 154,526 was a competitive antagonist at the CRF1 receptor (pK(B) = 8.17 +/- 0.05, n = 6), but was inactive at the CRF2 receptor. These data are consistent with established CRF receptor pharmacology and show that the Cytosensor is a viable method for assessing the functional activity of CRF-receptor agonists and antagonists.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Smart D,Coppell A,Rossant C,Hall M,McKnight ATdoi
10.1016/s0014-2999(99)00506-3keywords:
subject
Has Abstractpub_date
1999-08-27 00:00:00pages
229-35issue
2-3eissn
0014-2999issn
1879-0712pii
S0014-2999(99)00506-3journal_volume
379pub_type
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