Dendritic cells loaded with killed breast cancer cells induce differentiation of tumor-specific cytotoxic T lymphocytes

Breast Cancer Research : BCR
Eve-Marie Neidhardt-BerardA Karolina Palucka

Abstract

Early clinical trials, mostly in the setting of melanoma, have shown that dendritic cells (DCs) expressing tumor antigens induce some immune responses and some clinical responses. A major difficulty is the extension to other tumors, such as breast carcinoma, for which few defined tumor-associated antigens are available. We have demonstrated, using both prostate carcinoma and melanoma as model systems, that DCs loaded with killed allogeneic tumor cell lines can induce CD8+ T cells to differentiate into cytotoxic T lymphocytes (CTLs) specific for shared tumor antigens. The present study was designed to determine whether DCs would capture killed breast cancer cells and present their antigens to autologous CD4+ and CD8+ T cells. We show that killed breast cancer cells are captured by immature DCs that, after induced maturation, can efficiently present MHC class I and class II peptides to CD8+ and CD4+ T lymphocytes. The elicited CTLs are able to kill the target cells without a need for pretreatment with interferon gamma. CTLs can be obtained by culturing the DCs loaded with killed breast cancer cells with unseparated peripheral blood lymphocytes, indicating that the DCs can overcome any potential inhibitory effects of breast cancer...Continue Reading

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Citations

Jun 23, 2012·Cancer Immunology, Immunotherapy : CII·Gabriela A PizzurroJosé Mordoh
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Methods Mentioned

BETA
FCS
ELISA

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