alexa Secretion of sHLA-G molecules in malignancies.


Journal of Clinical & Cellular Immunology

Author(s): Rebmann V, Regel J, Stolke D, GrosseWilde H

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Abstract Our clinical studies revealed significantly increased soluble HLA-G (sHLA-G) plasma levels in patients suffering from malignant melanoma, glioma, breast and ovarian cancer. Specific ELISpot assays demonstrate that sHLA-G molecules expressing intron-4 sequences are preferentially secreted by peripheral blood monocytes. In vitro, the sHLA-G secretion of monocytes and tumor cells was strongly enhanced by TH1 cytokines like IFN-alpha, -beta, -gamma whereas TH2 cytokines (e.g. IL-4, -10) had minor effects. As sHLA-G can inhibit the functions of T and NK cells high concentration of these molecules should systemically or at the tumor side reduce the immune surveillance and thus favour the progression of cancer.
This article was published in Semin Cancer Biol and referenced in Journal of Clinical & Cellular Immunology

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