To investigate the influence of plasmacytoid dendritic cells (pDCs) on adaptive immune responses, recombinant antibodies to Siglec-H and BST2 were generated that enable the delivery of antigen to murine pDCs in vivo. Delivery of autoantigen (myelin oligodendrocyte glycoprotein) to pDCs via Siglec-H resulted in an attenuation of antigen specific effector T cell responses and a diminished disease severity in an antigen specific murine model of multiple sclerosis. In contrast to that, antigen delivery to pDCs with α-BST2 was able to successfully induce CD4+ and CD8+ effector T cell responses when α-BST2-antigen fusion protein was co-administered with adjuvant. These effector T cell responses were able to mediate protection in a viral infection model as well as in an antigen specific tumor model. This study shows that antigen delivery to murine pDCs is a powerful tool to modulate antigen specific T cell responses.
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To investigate the influence of plasmacytoid dendritic cells (pDCs) on adaptive immune responses, recombinant antibodies to Siglec-H and BST2 were generated that enable the delivery of antigen to murine pDCs in vivo. Delivery of autoantigen (myelin oligodendrocyte glycoprotein) to pDCs via Siglec-H resulted in an attenuation of antigen specific effector T cell responses and a diminished disease severity in an antigen specific murine model of multiple sclerosis. In contrast to that, antigen deliv...
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