Wednesday, June 11, 2014

New PolySciTech Products cationic/allyl reactive PLA and Block PEG-PLA’s

PolySciTech (www.polyscitech.com) now provides cationic PLA and related block copolymers. These polymers have been utilized previously for delivery of DNA/RNA as therapy for a variety of ailments. Read more about prior utilization here: Jones, Charles H., Chih-Kuang Chen, Ming Jiang, Lei Fang, Chong Cheng, and Blaine A. Pfeifer. "Synthesis of cationic polylactides with tunable charge densities as nanocarriers for effective gene delivery." Molecular pharmaceutics 10, no. 3 (2013): 1138-1145. http://pubs.acs.org/doi/full/10.1021/mp300666s

“Abstract: Well-defined cationic polylactides (CPLAs) with tertiary amine groups were synthesized by thiol–ene click functionalization of an allyl-functionalized polylactide to yield polymers with tunable charge densities. CPLAs have not previously been utilized in the context of DNA delivery. Thus, plasmid DNA (pDNA) encoding luciferase was delivered to two physiologically distinct cell lines (macrophage and fibroblast) via formation of CPLA/pDNA polyplexes by electrostatic interaction. The formulated polyplexes demonstrated high levels of transfection with low levels of cytotoxicity when compared to a positive control. Biophysical characterization of charge densities at various CPLA/pDNA weight ratios revealed a positive correlation between surface charge and gene delivery. Overall, these results help to elucidate the influence of polyplex charge and size upon the delivery of nucleic acid and support future gene delivery applications using this next-generation biomaterial. Keywords: CPLA; polylactic acid; gene therapy; gene delivery; DNA”
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