Abstract：
:Striatal neurons in primary culture express a wide variety of adenylate cyclase-coupled receptors, and particularly dopamine (DA) D1 receptors, which are known to induce an increase in cyclic AMP production. To study desensitization of those receptor-mediated responses, neurons were incubated in the presence of saturating concentrations of DA for various times. We observed a rapid desensitization of the D1 response after 15 min, which reached a maximum after 18 h. This effect is reversible since incubation of treated neurons in fresh medium led to a complete recovery of the dopamine response within 2 days. In addition, a brief treatment with DA resulted in heterologous desensitization of beta-adrenoceptors and 5-HT and vasoactive intestinal peptide (VIP) receptors coupled to adenylate cyclase on striatal neurons. Similar to what was observed for homologous desensitization, these effects are obtained within the first 15 min of exposure to DA; however, they are short-lasting, even in the persistent presence of DA.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Chneiweiss H,Glowinski J,Premont Jdoi
10.1016/0922-4106(90)90121-dsubject
Has Abstractpub_date
1990-10-30 00:00:00pages
287-92issue
4-5eissn
0014-2999issn
1879-0712journal_volume
189pub_type
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