The lacZ gene transfer into L929 cells and [14C]-DNA tissue distribution following intraperitoneal administration of new pH-sensitive lipoplexes in mice |
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Authors: | Sviridov Y V Zhdanov R I Podobed O V Tsvetkova T A Konstantinov I Bogdanenko E V |
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Institution: | Institute of Biomedical Chemistry, Russian Academy of Medical Sciences, Moscow. |
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Abstract: | The efficacy of lacZ gene transfer into the L929 cell line and a local l4C]-DNA delivery in male NMRI mice (10-12 weeks old), were studied using new pH-sensitive liposomes, containing phosphatidylcholine/glycyrrhizin (PC/GL) or alpha-tocopherol ester of succinic acid (PC/TSA). The reporter gene (pQE-LacZ plasmid) was transferred into L929 cells using corresponding lipoplexes, 0.5% of cells being transfected. Tissue distribution of Gasserian ganglion neurinoma cell 14C]-DNA fragments and corresponding PC/GL and PC/TSA lipoplexes, were examined following intraperitoneal administration of a 24 h postdose. The 14C]-DNA itself was not detected in any organs at a 1.5 h postdose. The use of PC/GL or PC/TSA lipoplexes considerably changed the biodistribution of 14C]-DNA in mice tissues. The maximal content of 14C]-DNA for both types of lipoplexes was observed in the intestine (50% dose equiv./g) and the spleen (30% dose equiv./g). The content of 14C]-DNA in liver and kidneys was equal to 4 and 10% for liver and kidneys in the case of PC/GL-lipoplexes, and 15 and 6%, for PC/TSA, respectively. Thus, the tropicity for PC/GL-lipoplexes to liver was not detected under i.p. administration. |
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