Abstract
Cytokine-induced killer (CIK) cells are a heterogeneous population of immune cells derived from peripheral blood lymphocytes with a high proliferative potential ex vivo. This study shows a rapid and reproducible protocol for adoptive immunotherapy with CIK cells in patients with hematologic malignancies. For this purpose a new automatic cell processing device (CytoMate, Baxter Oncology) was tested to improve extensive manipulations of these cells. Twenty CIK expansions obtained from healthy donors and patients with hematologic malignancies were washed and refilled with fresh medium during culture with the CytoMate. Recovery, viability, and cytotoxic activity were evaluated. Six cryopreserved CIK procedures were thawed and processed for washing out dimethyl sulfoxide automatically. Recovery of cells, viability, and early apoptosis were measured immediately after washing, and cytotoxic activity against target cell lines K562 and Daudi was tested after short culture. Prewash volume of CIK cultures was 3600 mL (range, 1970-6000 mL). After automatic wash, the total CIK cell recovery was 85.3 percent (range, 78.5%-97.5%), and living cells were greater than 95 percent. After thawing, the median recoveries of total nucleated cells and ...Continue Reading
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