Nexell Therapeutics Inc.

Frederick M Aono

Dennis E Van Epps

Mona Vachula

Mortimer T Alzona

A method for producing human dendritic cells for therapeutic purposes which allows culture-deriving dendritic cells using no cytokines, or reduced cytokines. The method involves culturing mononuclear cells from blood or bone marrow in a medium containing at least one agent such as a calcium ionophore, e.g. A23187, theophylline, protaglandin E1, dibutyryl cyclic AMP, Vitamin D3, Vitamin E, retinoic acid, or a fatty acid. The culture is maintained for a sufficient time, typically 4-14 days, to produce a culture enriched for dendritic cells, as evidenced by at least about 2.5% of total cells exhibiting dendritic cell processes, or a dendritic dell antigen such as CD80, CD86, or CD1a. Also provided is a method to produce antigen-specific human T-cells by pulsing the dendritic cells obtained by the method of the invention with an antigen such as a viral, tumor, bacterial, or cell surface antigen, and then co-culturing T-cells with the antigen-pulsed dendritic cells. Useful for treatment of viral or bacterial infections, useful as a cancer vaccine, useful to induce tolerance of allo- or xeno- graft.

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Arlington Hills, IL, United States of America

Frederick M Aono