PMID- 17870446 OWN - NLM STAT- MEDLINE DCOM- 20080508 LR - 20181201 IS - 0939-6411 (Print) IS - 0939-6411 (Linking) VI - 68 IP - 1 DP - 2008 Jan TI - Direct plasmid DNA encapsulation within PLGA nanospheres by single oil-in-water emulsion method. PG - 105-11 AB - Plasmid DNA was encapsulated within poly(d,l-lactic-co-glycolic acid) (PLGA) nanospheres by using polyethylene glycol (PEG) assisted solubilization technique of plasmid DNA in organic solvents. Plasmid DNA was solubilized in an organic solvent mixture composed of 80% methylene chloride and 20% DMSO by producing PEG/DNA nano-complexes having an average diameter less than 100 nm. DNA could be solubilized in the organic solvent mixture to a greater extent with increasing the weight ratio of PEG/DNA. PLGA nanospheres encapsulating DNA were successfully prepared by the single O/W emulsion method. They exhibited greater loading efficiency and better structural integrity, compared to those prepared by the W/O/W double emulsion method. Plasmid DNA could be successfully delivered to macrophage cells to express an exogenous gene. This new formulation enabled high loading of intact plasmid DNA within PLGA nanospheres useful for DNA vaccines. FAU - Mok, Hyejung AU - Mok H AD - Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea. FAU - Park, Tae Gwan AU - Park TG LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070718 PL - Netherlands TA - Eur J Pharm Biopharm JT - European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V JID - 9109778 RN - 0 (Emulsions) RN - 0 (Polymers) RN - 0 (Solvents) RN - 1SIA8062RS (Polylactic Acid-Polyglycolic Acid Copolymer) RN - 26009-03-0 (Polyglycolic Acid) RN - 33X04XA5AT (Lactic Acid) RN - 3WJQ0SDW1A (Polyethylene Glycols) RN - 9007-49-2 (DNA) SB - IM MH - DNA/*chemistry MH - Emulsions/chemistry MH - Gene Expression MH - Gene Transfer Techniques MH - Genetic Therapy/methods MH - Lactic Acid/*chemistry MH - Macrophages/metabolism MH - Nanospheres MH - Particle Size MH - Plasmids/*chemistry MH - Polyethylene Glycols/chemistry MH - Polyglycolic Acid/*chemistry MH - Polylactic Acid-Polyglycolic Acid Copolymer MH - Polymers/*chemistry MH - Solubility MH - Solvents EDAT- 2007/09/18 09:00 MHDA- 2008/05/09 09:00 CRDT- 2007/09/18 09:00 PHST- 2006/11/29 00:00 [received] PHST- 2007/04/20 00:00 [revised] PHST- 2007/04/20 00:00 [accepted] PHST- 2007/09/18 09:00 [pubmed] PHST- 2008/05/09 09:00 [medline] PHST- 2007/09/18 09:00 [entrez] AID - S0939-6411(07)00257-3 [pii] AID - 10.1016/j.ejpb.2007.04.022 [doi] PST - ppublish SO - Eur J Pharm Biopharm. 2008 Jan;68(1):105-11. doi: 10.1016/j.ejpb.2007.04.022. Epub 2007 Jul 18.