Published in:
01-11-2009 | Original Article
Induction of myeloma-specific cytotoxic T lymphocytes ex vivo by CD40-activated B cells loaded with myeloma tumor antigens
Authors:
Sang-Ki Kim, Thanh-Nhan Nguyen Pham, Tuyet Minh Nguyen Hoang, Hyun-Kyu Kang, Chun-Ji Jin, Jong-Hee Nam, Sang-Young Chung, So-Jin-Na Choi, Deok-Hwan Yang, Yeo-Kyeoung Kim, Ik-Joo Chung, Hyeoung-Joon Kim, Je-Jung Lee
Published in:
Annals of Hematology
|
Issue 11/2009
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Abstract
We investigated to establish CD40-activated B cells (CD40-B cells) as alternative antigen-presenting cells (APCs) for the induction of myeloma-specific cytotoxic T lymphocytes (CTLs). To generate CD40-B cells, peripheral blood mononuclear cells were co-cultured with CD40L-transfected J558 cells in the presence of IL-4, insulin, transferrin, and cyclosporine for 14 days, and pulsed with myeloma lysates. The CD40-B cells consistently expressed high levels of CD80, CD86, CD54, CCR7, and HLA-DR. The CD40-B cells produced IL-12, IFN-γ, and IL-6 during the culture period, but not IL-10. In addition, the CD40-B cells showed potent allogeneic T-cell stimulatory capacities that depended on the dose ratio and had the potential to polarize naïve T cells into Th1 subsets. The CD40-B cells loaded with tumor lysates induced strong target-specific CTLs, based on large numbers of IFN-γ secreting cells and higher cytotoxic activity against target cells compared to the CD40-B cells without the tumor lysates. These results suggest that CD40-B cells loaded with myeloma lysates might provide alternative APCs for cellular immunotherapy in patients with myeloma.