Mammalian methadone-specific opioid receptor and uses in binding assays
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United States of America Patent
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Oct 13, 1998
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Aug 15, 1997
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Nov 8, 1993
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Abstract
The present invention relates to a novel mammalian met one-specific opioid receptor protein and genes that encode a such protein. The invention is directed toward the isolation, characterization and pharmacological use of mammalian methadone-specific opioid receptor proteins. The invention specifically provides isolated complementary DNA copies of mRNA corresponding to the rat homologue or the mammalian methadone-specific opioid receptor gene. Also provided are recombinant expression constructs capable of expressing the mammalian methadone-specific opioid receptor genes of the invention in cultures of transformed prokaryotic and eukaryotic cells, as well as such cultures of transformed cells that synthesize the mammalian methadone-specific opioid receptor proteins encoded therein. The invention also provides methods for screening compounds in vitro that are capable of binding to the mammalian methadone-specific opioid receptor proteins of the invention, and further characterizing the binding properties of such compounds in comparison with known opioid receptor agonists and antagonists.
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