Abstract
Front Cover: A series of well-defined polypeptide-polypeptoid block copolymers based on the body's own amino acids sarcosine and lysine are prepared by K. Fischer, M. Bros, M. Barz, and co-workers on page 1380 by ring opening polymerization of N-carboxyanhydrides. The obtained block ionomers are used to complex pDNA resulting in the formation of polyplexes (PeptoPlexes). The PeptoPlexes can be successfully applied in the transfection of HEK293T cells and are able to transfect up to 50% of cells in vitro (FACS assay), while causing no detectable toxicity in an Annexin V assay. These findings are a first indication that PeptoPlexes may be a suitable alternative to PEG based non-viral transfection systems.
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