PMID: 18202753Jan 19, 2008Paper

Vaccination strategy to target lysyl oxidase-like 4 in dendritic cell based immunotherapy for head and neck cancer

International Journal of Oncology
Jan Bernd WeiseTibor Görögh

Abstract

Overexpression of lysyl oxidase (LOX) is associated with the invasive potential of metastatic breast and head and neck cancer (HNC) cells and reduced metastasis-free and overall survival. Recently, we have demonstrated up-regulation of a new member of the LOX family, lysyl oxidase-like 4 (LOXL4), in invasive HNC revealed a significant correlation between LOXL4 expression and local lymph node metastases and higher tumour stages. The objective of this study was to examine whether cellular LOXL4 may provide an effective target for cell-meditated immunotherapy in invasive tumours associated with LOXL4 overexpression. As a feasibility study we expressed LOXL4 mRNA in immature dendritic cells derived from human peripheral blood mononuclear cells (PBMC). LOXL4 protein expression was ascertained using Western blotting and immunocytochemistry with polyclonal rabbit anti-LOXL4 antibody. The successfully transfected immature dendritic cells (DCs) were induced to mature with GM-CSF, IL-4, IL-1beta, TNF-alpha, IL-6, and PGE2, and then used to stimulate T cell enriched non-adherent fraction of PBMC. LOXL4 specific T cell stimulation induced cytotoxic T lymphocyte (CTL) response was monitored using IFN-gamma secretion from the non-adherent PB...Continue Reading

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