PMID: 8982290Oct 1, 1996Paper

Gene transduction into murine primitive hematopoietic cells with 2-gene retroviral vectors using a Transwell coculture system

European Journal of Haematology
N AsamiY Katsura

Abstract

The present study aims at expressing a reporter gene in hematopoietic cells in vivo by introducing it into primitive hematopoietic cells with a 2-gene retroviral vector. Various constructs of retroviral vectors containing the human IL-2 receptor alpha chain gene (TAC) as the reporter and the neomycin phosphotransferase gene (neo) as a selectable marker were engineered, and the effectiveness of these vectors for expression of the reporter gene was evaluated after transfection into the packaging cell line GP + E86. It was found that the highest levels of reporter gene expression were attained with constructs ordered 5' long terminal repeat (LTR)-TAC-internal promoter-neo-3' LTR. In experiments investigating the expression of a reporter gene in hematopoietic cells, we used the Escherichia coli beta-galactosidase gene (lacZ) instead of TAC, because a very sensitive detection method was available for lacZ. For transduction of hematopoietic progenitors, packaging cell lines producing recombinant viruses were cultured in a Transwell hung into a Dexter-type bone marrow (BM) culture. The BM cells were selected with G418, and transferred into irradiated recipient mice. LacZ enzyme activity was detectable in the peripheral blood lymphocyt...Continue Reading

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