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Blood, 1 April 2006, Vol. 107, No. 7, pp. 2786-2789. Prepublished online as a Blood First Edition Paper on December 15, 2005; DOI 10.1182/blood-2004-01-0113.
Submitted January 20, 2004
Molecular Tumor Biology and Tumor Immunology, Clinic I of Internal Medicine, Hematology & Oncology, University of Cologne, Cologne, Germany * Corresponding author; email: joachim.schultze{at}medizin.uni-koeln.de.
CD40-activated B cells (CD40-B cells) have previously been introduced as an alternative source of antigen presenting cells for immunotherapy. CD40-B cells can prime naive and expand memory T cells and they can be generated in large numbers from very small amounts of peripheral blood derived from healthy individuals or cancer patients alike. Administration of CD40-B cells as a cellular adjuvant would require these cells to migrate towards secondary lymphoid organs and attract T cells in situ, processes guided by specific chemokines and chemokine receptors. Here, we demonstrate that primary, human CD40-B cells express a pattern of adhesion molecules and chemokine receptors necessary for homing to secondary lymphoid organs and have the capacity to migrate to cognate ligands. Furthermore, we show that CD40-B cells express important T cell attractants and induce strong T cell chemotaxis. These findings further support the use of CD40-B cells as cellular adjuvants for cancer immunotherapy.
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