Induction of Th1 response by dendritic cells pulsed with autologous melanoma apoptotic bodies.

Abstract:

BACKGROUND:We hypothesize that dendritic cells (DCs) can process antigens from autologous melanoma apoptotic bodies (MABs) and induce effector T cells in melanoma patients. MATERIALS AND METHODS:Peripheral blood mononuclear cells were obtained from three stage IV melanoma patients and adherent cells were cultured in complete medium (CM) containing GM-CSF (800 U/ml) and IL-4 (1000 U/ml) for 7 days. Autologous MABs from melanoma cells following actinomycin D treatment (0.5 microgram/ml) for 24 hours, were added to 72 hour DC culture. Autologous effector T cells were cultured in CM containing 60 IU/ml of IL-2 and were stimulated by MAB-pulsed DCs three times at a weekly interval. Effector T cells were harvested at the end of third cycle of DC stimulation. RESULTS:Using ELISPOT, IFN-gamma production by effector T cells stimulated by MAB-pulsed DCs was significantly higher than that by T cells without DC stimulation. Microscopy demonstrated phagocytosis of MABs by DCs. CONCLUSIONS:MAB-pulsed DCs are capable of stimulating Th1-directed autologous effector T cells. Pulsing DCs with autologous MABs may be a novel approach in future DC-based immunotherapeutic trials.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Chang JW,Peng M,Vaquerano JE,Zhou YM,Clinton RA,Hyun WC,Giedlin MA,Leong SP

subject

Has Abstract

pub_date

2000-05-01 00:00:00

pages

1329-36

issue

3A

eissn

0250-7005

issn

1791-7530

journal_volume

20

pub_type

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