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Basic Research for Interferon Gene Therapy against Malignant Glioma Masaaki MizuNo 1 , Jun YOSHIDA 1 , Kenichiro SUGITA 1 , Yutaka HAYASHI 2 , Kunio YAGI 2 1Department of Neurosurgery, Nagoya University School of Medicine 2Institute of Applied Biochemistry Keyword: Glioma , Interferon—β , Gene therapy , Liposome , Transfection pp.547-551
Published Date 1992/5/10
DOI https://doi.org/10.11477/mf.1436900459
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Abstract

In order to establish new interferon therapy against malignant glioma by selective transfection of its gene, we developed a novel transfection system using lipo-somes bearing positive charges on their surface and en-trapping plasmids containing the HuIFN- β gene (pSV2IFN- (3) . The liposomes were composed of N-(α -trimethylammonioacetyl) -didodecyl-D-glutamate chloride (TMAG) , dilauroylphosphatidylcholine (DLPC) , and dioleoylphosphatidylethanolamine (DOPE) as a molar ratio of 1: 2: 3. The liposomes were not observed to have cytotoxicity for human glioma cells, when applied at a rate less than 15nmol/ ml. This liposome-mediated transfection of the gene into the cultured glioma cells (U-251-MG) resulted in the secretion of HuIFN- β into the medium. The HuIFN- β level in the culture media of glioma cells reached 23 IU/ml after 96h of incubation. When the pSV2IFN- β containing liposomes were coupled with a monoclonal antibody (G-22 MCA) against glioma-associated antigen (G-22), the level of HuIFN- β in the medium was 181 IU/ml, resulting in a 7-fold increase. It was indicated that this transfection system was a safe and selective method in the case of TMAG/ DLPC/DOPE liposomes.


Copyright © 1992, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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