The present technology improves immunogenicity by treating DCs during maturation with the fungal-derived enzyme galactose oxidase. Hereby, a stronger physical interaction between DCs and T cells is achieved resulting in an at least 10-fold improved T cell priming capacity. In cell culture assays both human and mouse DCs showed enhanced T cell priming potential, the murine cells also in vivo. Even the T cell stimulatory potential of mature DCs that were putatively activated up to a maximum was further improved by the galactose oxidase treatment. Hence, low affine T lymphocytes, as often found in the context of tumor antigens, can be activated and brought to proliferation too. By improving T cell priming capability and therefore immunogenicity, this technology provides the opportunity to markedly enhance the classical DC maturation and accordingly to improve DC-vaccine approaches for example in tumor or HIV patients.
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