alexa Liposomes as carriers for DNA-PNA hybrids.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Nastruzzi C, Cortesi R, Esposito E, Gambari R, Borgatti M,

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Abstract Peptide nucleic acids (PNAs) are DNA mimics composed of N-(2-aminoethyl)glycine units. This structure gives to PNAs (a) resistance to DNases and proteinases, (b) capacity to hybridize with high affinity to complementary sequences of single-stranded RNA and DNA, and (c) capacity to form highly stable (PNA)(2)-RNA triplexes with RNA targets. Furthermore, DNA-PNA hybrid molecules are capable to reversibly interact with DNA-binding proteins, being therefore of interest for studies on regulation of gene expression by the decoy approach. The major conclusion of this paper is that cationic liposomes are able to efficiently complexate DNA-PNA hybrid molecules and mediate their binding to target cells. Our results are of some interest, since, unlike commonly used nucleic acids analogs, PNA oligomers are not taken up spontaneously into the cells. In addition, they are not suitable for an efficient delivery with commonly used liposomal formulations. Transfection of PNA-DNA hybrid molecules to in vitro cultured cells could be of great interest to determine the applications of these new reagents to experimental alteration of gene expression.
This article was published in J Control Release and referenced in Journal of Nanomedicine & Nanotechnology

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