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Cell penetrating PNA constructs regulate galanin receptor levels and modify pain transmission in vivo

Abstract

Peptide nucleic acids (PNAs) form stable and tight complexes with complementary DNA and/or RNA and would be promising antisense reagents if their cellular delivery could be improved. We show that a 21-mer PNA, complementary to the human galanin receptor type 1 mRNA, coupled to the cellular transporter peptides, transportan or pAntennapedia(43–58), is efficiently taken up into Bowes cells where they block the expression of galanin receptors. In rat, the intrathecal administration of the peptide-PNA construct results in a decrease in galanin binding in the dorsal horn. The decrease in binding results in the inability of galanin to inhibit the C fibers stimulation-induced facilitation of the rat flexor reflex, demonstrating that peptide-PNA constructs act in vivo to suppress expression of functional galanin receptors.

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Pooga, M., Soomets, U., Hällbrink, M. et al. Cell penetrating PNA constructs regulate galanin receptor levels and modify pain transmission in vivo. Nat Biotechnol 16, 857–861 (1998). https://doi.org/10.1038/nbt0998-857

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