期刊
CANCER IMMUNOLOGY IMMUNOTHERAPY
卷 60, 期 1, 页码 123-131出版社
SPRINGER
DOI: 10.1007/s00262-010-0925-y
关键词
Dendritic cells; Immunotherapy; Interferon-gamma; Apoptosis; Melanoma
资金
- Hoag Hospital Foundation
The use of whole cell tumor vaccines and various means of loading antigen onto dendritic cells have been under investigation for over a decade. Induction of apoptosis and the exposure of immune-stimulating proteins are thought to be beneficial for the use in immunotherapy protocols, but conclusive evidence in the clinical setting has been lacking. Incubation of melanoma cell lines with interferon-gamma (IFN-gamma) increased phosphatidylserine and calreticulin exposure, but not in the IFN-gamma-resistant cell line Lu-1205. Short-term autologous melanoma cell lines used for loading dendritic cells for immunotherapy showed differential response to the pro-apoptotic effects of IFN-gamma. These IFN-gamma-treated tumor cells (TCs) were irradiated and used for loading antigen for dendritic cell therapy. A log-rank comparison of survival for patients whose TCs were found to be either sensitive (upregulated phosphatidylserine and calreticulin) or insensitive to IFN-gamma revealed a strongly significant correlation to progression-free (p = 0.003) and overall survival (p = 0.002) favorably in those patients whose cell lines were resistant to the proapoptotic effect of IFN-gamma. These results suggest that the use of IFN-gamma in anti-melanoma dendritic cell-based immunotherapy may only be beneficial when the cells do not undergo apoptosis in response to IFN-gamma and support the contention that the use of some apoptotic cells in vaccines may be detrimental.
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