Gene Therapy

New gene therapy study findings have been published by scientists at University of Munich

Published in Gene Therapy Weekly, January 31st, 2008

According to recent research from Munich, Germany, "Non-viral vectors based on polyethylenimine (PEI) are usually generated with an excess of PEI. However, the amount of unbound polymer correlates with toxicity limiting the in vivo use of these gene carriers."

"Purification based on size exclusion chromatography of PEI/DNA polyplexes smaller than 200 nm has been shown to efficiently remove unbound PEI polymer. A novel purification method based on electrophoresis can purify PEI polyplexes independent of their size resulting in polyplexes with final PEI nitrogen/DNA phosphate ratios between 2.6 and 3.1. Also unbound PEI conjugates like PEGylated PEI and...

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Source: Gene Therapy Weekly (2008-01-31)

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