当前位置： SCI文献检索 > INTERNATIONAL IMMUNOPHARMACOLOGY期刊下所有文献 > Interferon gamma induction in human melanoma cell/allogeneic leukocyte co-cultures is enhanced by interleukin 18 but drug resistant melanoma cells are poorer inducers of IFN-gamma.

Interferon gamma induction in human melanoma cell/allogeneic leukocyte co-cultures is enhanced by interleukin 18 but drug resistant melanoma cells are poorer inducers of IFN-gamma.

Abstract：

:Human melanoma Colo 679 cells were made resistant to doxorubicin (adriamycin, ADM) by continuous exposure to ascending concentrations of the drug and Colo/ADM80; a variant which grew continuously in the presence of 80 ng/ml of ADM was thus established. Human peripheral blood mononuclear cells (PBMC) produced interferon gamma (IFN-gamma) when cultured with mitomycin C (MMC)-treated parental Colo 679 cells. The synthesis of IFN-gamma was synergistically enhanced by adding interleukin-18 (IL-18) and this was IL-12-dependent because a neutralizing antibody against IL-12 almost completely inhibited IFN-gamma production while control antibodies (Abs) were inactive. The cellular sources of IFN-gamma were found to be B cells, CD8+ T cells and CD4+ T cells as revealed by flow cytometry after double staining for surface antigens and staining for intracellular IFN-gamma. Interestingly, the resistant cell line induced much less IFN-gamma production than the parental cell line under the same co-culture conditions; however, IL-18 could still enhance the production of IFN-gamma. In conclusion, our study shows that acquired resistance to anti-cancer agents can also reduce immune responses to cancer cells. However, the immunostimulatory cytokine IL-18 could still enhance IFN-gamma production in drug resistant tumor cell-PBMC cultures indicating that such immunostimulatory agents could still be beneficial in immunotherapy for patients with recurrent drug resistant tumors.

journal_name

Int Immunopharmacol

journal_title

International immunopharmacology

authors

Micallef MJ,Darmanin S,Buhagiar JA,Camilleri-Podesta MT,Yamauchi H,Kurimoto M,Inglott AS,Ellul-Micallef R

doi

10.1016/s1567-5769(00)00026-6

keywords:

subject

Has Abstract

pub_date

2001-02-01 00:00:00

pages

295-305

issue

2

eissn

1567-5769

issn

1878-1705

pii

S1567576900000266

journal_volume

1

pub_type

杂志文章

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