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J Med Chem. 2010 May 27;53(10):3919-26. doi: 10.1021/jm901489k.

Peptide nucleic acids conjugated to short basic peptides show improved pharmacokinetics and antisense activity in adipose tissue.

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  • 1Isis Pharmaceuticals, Inc., Carlsbad, California 92008, USA.


A peptide nucleic acid (PNA) targeting a splice junction of the murine PTEN primary transcript was covalently conjugated to various basic peptides. When systemically administered to healthy mice, the conjugates displayed sequence-specific alteration of PTEN mRNA splicing as well as inhibition of full length PTEN protein expression. Correlating activity with drug concentration in various tissues indicated strong tissue-dependence, with highest levels of activity observed in adipose tissue. While the presence of a peptide carrier was found to be crucial for efficient delivery to tissue, little difference was observed between the various peptides evaluated. A second PNA-conjugate targeting the murine insulin receptor primary transcript showed a similar activity profile, suggesting that short basic peptides can generally be used to effectively deliver peptide nucleic acids to adipose tissue.

[PubMed - indexed for MEDLINE]
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