Journal
PLOS ONE
Volume 10, Issue 10, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0139603
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Funding
- Swiss National Science Foundation [SNF 31003A_130122]
- Swiss National Science Foundation (SNF) [31003A_130122] Funding Source: Swiss National Science Foundation (SNF)
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Immunotherapy targeting glioblastoma initiating cells (GIC) is considered a promising strategy. However, GIC are prone to evade immune response and there is a need for potent adjuvants. IFN-beta might enhance the immune response and here we define its net effect on the innate immunogenicity of GIC. The transcriptomes of GIC treated with IFN-beta and controls were assessed by microarray-based expression profiling for altered expression of immune regulatory genes. Several genes involved in adaptive and innate immune responses were regulated by IFN-beta. We validated these results using reverse transcription (RT)-PCR and flow cytometry for corresponding protein levels. The up-regulation of the NK cell inhibitory molecules HLA-E and MHC class I was balanced by immune stimulating effects including the up-regulation of nectin-2. In 3 out of 5 GIC lines tested we found a net immune stimulating effect of IFN-beta in cytotoxicity assays using NKL cells as effectors. IFN-beta therefore warrants further investigation as an adjuvant for immunotherapy targeting GIC.
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