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Gene Ther. 1998 Nov;5(11):1508-16.

Polyethylenimine-mediated transfection of human monocytes with the IFN-gamma gene: an approach for cancer adoptive immunotherapy.

Author information

1
Institut d'Hématologie, Laboratoire de Recherche en Hématologie et Immunothérapie des Cancers, Strasbourg, France.

Abstract

Human monocytes (Mo) and monocyte-derived macrophages (MdM) are major effectors in host defense systems against cancer. Their antitumoral activity is dependent upon two processes: recruitment and activation. One of the most powerful activators for these cells is recombinant human IFN-gamma (rhIFN-gamma). However, when the potential of activated rhIFN-gamma was evaluated in clinical trials by ex vivo adoptive cellular immunotherapy protocols, the major problem was the short duration of ex vivo activation by rhIFN-gamma. Thus repeated injections were required to obtain a clinical response. To overcome this limitation we have developed a gene transfer protocol with IFN-gamma cDNA and polyethylenimine so as to obtain an efficient, long-lasting autocrine cytocidal activation in transfected human Mo/MdM. We show, by clonogenic assays, that efficient transfection and tumoricidal activity can be obtained by this method in human monocyte populations. Although the proposed model must be improved before clinical use, IFN-gamma producing monocytes have potential for adoptive immunotherapy.

PMID:
9930304
DOI:
10.1038/sj.gt.3300756
[Indexed for MEDLINE]
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