Comparison of cytotoxic T lymphocyte responses against pancreatic cancer induced by dendritic cells transfected with total tumor RNA and fusion hybrided with tumor cell

Experimental Biology and Medicine
Jiang ChenXiao-Dong Shao

Abstract

Pancreatic cancer (PC) is a deadly human malignancy. Dendritic cell (DC)-based immunotherapy with whole tumor antigens demonstrates potential efficiency in cancer treatment. Tumor RNA and tumor fusion hybrid cells are sources of whole tumor antigens for preparing DC tumor vaccines. However, the efficacy of these sources in eliciting immune responses against PC has not yet to be directly compared. In the present study, patient-derived PC cells and DCs were fused (DC-tumor hybrids) and primary cultured PC cell-derived total RNA was electroporated into autologous DCs (DC-tumor RNA). The antitumor immune responses induced by DC-tumor hybrids and DC-tumor RNA were compared directly. The results showed that both RNA and hybrid methodologies could induce tumor-specific cytotoxic T lymphocyte (CTL) responses, but pulsing DCs with total tumor RNA could induce a higher frequency of activated CTLs and T-helper cells than fusing DCs with autologous tumor cells. In addition, DC-tumor RNA triggered stronger autologous tumor cell lysis than DC-tumor hybrids. It could be concluded that DCs pulsed with whole tumor RNA are superior to those fused with tumor cells in priming anti-PC CTL responses. Electroporation with total tumor RNA may be more ...Continue Reading

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Methods Mentioned

BETA
surgical resection
transfection
leukapheresis
density-gradient centrifugation
electron microscopy
flow cytometry
enzyme-linked immunosorbent assay
ELISA
FACS

Software Mentioned

Cell Quest
StatView

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