Advertisement

 

 

DCOne as an Allogeneic Cell-based Vaccine for Multiple Myeloma.

DCOne as an Allogeneic Cell-based Vaccine for Multiple Myeloma.
Author Information (click to view)

Leaf RK, Stroopinsky D, Pyzer AR, Kruisbeek AM, van Wetering S, Washington A, Ephraim A, Cole L, Morin A, Jain S, Nahas MR, Apel A, Arnason J, Hamdan A, Rosenblatt J, Avigan D,


Leaf RK, Stroopinsky D, Pyzer AR, Kruisbeek AM, van Wetering S, Washington A, Ephraim A, Cole L, Morin A, Jain S, Nahas MR, Apel A, Arnason J, Hamdan A, Rosenblatt J, Avigan D, (click to view)

Leaf RK, Stroopinsky D, Pyzer AR, Kruisbeek AM, van Wetering S, Washington A, Ephraim A, Cole L, Morin A, Jain S, Nahas MR, Apel A, Arnason J, Hamdan A, Rosenblatt J, Avigan D,

Advertisement

Journal of immunotherapy (Hagerstown, Md. : 1997) 2017 09 28() doi 10.1097/CJI.0000000000000185

Abstract

Multiple myeloma (MM) is characterized by progressive immune dysregulation, loss of myeloma-specific immunity, and an immunosuppressive milieu that fosters disease growth and immune escape. Accordingly, cancer vaccines that reverse tumor-associated immune suppression represent a promising therapeutic avenue of investigation. We examined the potential of an allogeneic cellular vaccine to generate immune responses against MM tumor cells. The DCOne vaccine is comprised of a human myeloid leukemia cell line differentiated into a fully functional dendritic cell, expressing a range of tumor-associated antigens that are also known targets in MM. We found that the myeloma-specific antigens expressed by the DCOne vaccine can traffic via extracellular vesicles to surrounding antigen-presenting cells, thus stimulating autologous T-cell responses. Indeed, coculture of peripheral blood mononuclear cells from patients with MM with the DCOne vaccine resulted in the expansion of activated CD8 T cells expressing interferon-γ and perforin, with no significant change in the percentage of CD4 T cells producing interleukin-10. Further, coculture of patient’s tumor cells with peripheral blood mononuclear cells and DCOne induced cytotoxic T-lymphocyte-mediated killing of autologous MM cells. These findings demonstrate that the allogeneic DCOne vaccine can induce T-cell activation and myeloma-specific immunity via cross presentation of antigens by native antigen-presenting cells.

Submit a Comment

Your email address will not be published. Required fields are marked *

3 + thirteen =

[ HIDE/SHOW ]