Hyperthermia improves cellular immune response to human hepatocellular carcinoma subsequent to co-culture with tumor lysate pulsed dendritic cells.

Abstract:

:Dendritic cells play a major role in cellular immunity. The crucial steps of antigen presentation and processing by DCs may be limiting factors for adoptive cellular immunotherapy. Here, we investigated whether hyperthermia of human hepatocellular carcinoma (HCC) cells induces enhanced cytotoxic cellular immune response. Peripheral blood mononuclear cell (PBMC)-derived DCs were pulsed with tumor cell lysate of the human HCC cell line HepG2, which had been heat shocked prior to incubation for 5 h. Subsequent to TNFalpha-induced maturation DCs were co-cultured with autologous CD4+ and/or CD8+ cells, and T cell mediated cytolysis of HepG2 cells was assessed. We observed enhanced CD4+/8+ cellular cytotoxicity against HepG2 cells subsequent to co-culture with the heat shocked tumor lysate pulsed DCs as compared to pulsing DCs with lysate of non-heat shocked tumor cells. The improved cellular immune response can be related to enhanced expression of HSP 70 and 90 in HepG2 cells upon hyperthermia.

journal_name

Int J Oncol

authors

Schueller G,Stift A,Friedl J,Dubsky P,Bachleitner-Hofmann T,Benkoe T,Jakesz R,Gnant M

keywords:

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

1397-402

issue

6

eissn

1019-6439

issn

1791-2423

journal_volume

22

pub_type

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