Peptide biosynthesis and pain therapy
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United States of America Patent
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Aug 23, 2011
Grant Date -
May 12, 2011
app pub date -
Sep 29, 2010
filing date -
Jun 1, 2005
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Abstract
The invention provides an expression cassette comprising a DNA sequence encoding amino acids 1-99 of human preproenkephalin, a DNA sequence encoding a precursor of a carboxy-amidated peptide flanked by dibasic cleavage sites and optionally a DNA sequence encoding a marker protein (such as Enhanced Green Fluorescent Protein (GFP)) all in operable linkage and under control of a promoter. Where the encoded precursor of a carboxy-amidated peptide is an agonist for an opioid receptor, the invention further provides a method of treating neuropathic pain by administering the gene transfer vector comprising such an expression cassette to a patient. The invention also provides a method for detecting a peptide having a desired effect comprising introducing a library of DNA sequences encoding one or more precursors of carboxy-amidated peptides into host cells; expressing the carboxy-amidated peptides encoded in the library to provide expression products; and screening from the polypeptide expression products for the desired effect.
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