期刊
JOURNAL OF CONTROLLED RELEASE
卷 72, 期 1-3, 页码 171-178出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0168-3659(01)00273-5
关键词
gene delivery; plasmid; leukemia; Molt 4 cell; anti-JL1 antibody
We have designed the gene delivery carrier targeted to Molt 4 cells, human leukemia T cells, using monoclonal antibody against leukemia-specific JL1 antigen, anti-JL1 antibody, as a targeting moiety. Anti-JL1 antibody has been proven to bind to JL1 antigen and subsequently be internalized into Molt 4 cells, demonstrating that anti-JL1 antibody has the potential as a targeting ligand for leukemia-specific gene transfer. Anti-JL1 antibody was modified with the heterobifunctional crosslinker, PDPH, at carbohydrate sites and conjugated to thiolated poly-L-lysine (PLL) via disulfide bridges. The composition and antigen binding affinity of antibody-PLL conjugates were analyzed by the amino acid analysis and the flow cytometry, respectively. Antibody-PLL conjugates neutralized pSV-beta -galactosidase plasmid DNA at 5:1 weight ratio and condensed into about 200-300-nm complexes. DNA/antibody-PLL complexes were effectively internalized into Molt 4 cells after 4 h incubation at 37 degreesC and showed significantly higher in vitro transfection efficiency than DNA/PLL complexes and DNA/Lipofectin(TM) formulation due to the targeting effect of receptor-mediated endocytosis induced by anti-JL1 antibody. (C) 2001 Elsevier Science B.V. All rights reserved.
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