Abstract
The tumor-associated carbohydrate antigen/hapten Thomsen-nouveau (Tn; α-D-GalpNAc-ONH2) was conjugated to a zwitterionic capsular polysaccharide, PS A1, from commensal anaerobe Bacteroides fragilis ATCC 25285/NCTC 9343 for the development of an entirely carbohydrate cancer vaccine construct and probed for immunogenicity. This communication discloses that murine anti-Tn IgG3 antibodies both bind to and recognize human tumor cells that display the Tn hapten. Furthermore, the sera from immunization of mice with Tn-PS A1 contain cytokine interleukin 17 (IL-17A), which is known to possess anti-tumor function and represents a striking difference to an IL-2, and IL-6 profile obtained with anti-PS A1 sera.
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Acknowledgments
Authors thank Dr. Mary Kay Pflum for Jurkat and JurkatTAg cell lines. P.R.A acknowledges Wayne State University for financial support and the National Institutes of Health/National Cancer Institute for an R01 CA 156661 award.
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The authors declare that they have no conflict of interest.
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De Silva, R.A., Appulage, D.K., Pietraszkiewicz, H. et al. The entirely carbohydrate immunogen Tn-PS A1 induces a cancer cell selective immune response and cytokine IL-17. Cancer Immunol Immunother 61, 581–585 (2012). https://doi.org/10.1007/s00262-012-1205-9
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DOI: https://doi.org/10.1007/s00262-012-1205-9