Pertussis toxin treatment modifies opiate action in the rat brain striatum

M. E. Abood, P. Y. Law, H. H. Loh

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


In this report we present evidence that a guanine nucleotide regulatory protien, Gi, mediates opiate action in the rat brain striatum. Opiates inhibit basal adenylate cyclase activity in rat brain striatum. This effect on adenylate cyclase is dose-dependently attenuated by pretreatment of membranes with pertussis toxin, which ADP-ribosylates a protein with a molecular mass of 41,000 daltons. This protein co-migrates with the GTP-binding subunit of Gi, which mediates inhibition of adenylate cyclase. Several brain regions were compared for the extent of radiolabeling and effects on adenylate cyclase activity. Although Gi was found in each region examined, opiate inhibition of adenylate cyclase is clearly seen only in the striatum.

Original languageEnglish (US)
Pages (from-to)477-483
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number2
StatePublished - Mar 15 1985

PubMed: MeSH publication types

  • Journal Article
  • Research Support, U.S. Gov't, P.H.S.


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