A comparison between intravenous and peritoneal route on liver targeted uptake and expression of plasmid delivered by Glyco-poly-l-lysine.

AIM:To compare the effects of intravenous route and peritoneal route on liver targeted uptake and expression of plasmid delivered by galactose-terminal glyco-poly-l-lysine (G-PLL).METHODS:The plasmid pTM/MMP-1 which could be expressed in eukaryotic cells was bound to G-PLL, and was then transferred into Wistar rats by intravenous and intraperitoneal injection. The expression and distribution of the plasmid were observed at different time periods by in situ hybridization and immunohistochemistry.RESULTS:The plasmid could be expressed significantly within 24 h after being transferred in vivo by both intravenous and intraperitoneal routes. One week later the expression began to decrease, and could still be observed three weeks later. Although both the intravenous and intraperitoneal route could target-specifically deliver the plasmid to the liver, the effect of the former was better as compared to that of the latter.CONCLUSION:Intravenous route is better for liver targeted uptake and expression of G-PLL-bound plasmids than the peritoneal route.

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