WT1-loaded Artificial Adjuvant Vector Cell Immunotherapeutic ASP7517
wt1-loaded artificial adjuvant vector cell immunotherapeutic asp7517
"A preparation of artificial adjuvant vector cells (aAVCs) composed of cells from the cell line HEK293, which is derived from human embryonic kidney cells, that are transfected with the natural killer T (NKT) immune cell receptor cluster of differentiation 1d (CD1d) and loaded with the glycolipid and CD1d ligand alpha-galactosylceramide (alpha-GalCer) on the cell surface, and loaded with the full-length tumor-associated antigen (TAA) Wilms' tumor 1 (WT1), with potential immunomodulating and antineoplastic activities. Upon administration of the WT1-loaded aAVC immunotherapeutic ASP7517, the alphaGalCer on the cell surface activates invariant NKT (iNKT) cells, thereby eliciting WT1-specific NKT cell responses against ASP7517. This in turn activates a natural killer (NK) cell response against WT1-expressing tumor cells. Also, the WT1 released from destroyed ASP7517 is taken up by antigen-presenting cells (APCs), mainly by dendritic cells (DCs), which in turn activates cytotoxic T-lymphocytes (CTL) and results in a CTL-mediated immune response against WT1-expressing tumor cells, thereby further destroying WT1-expressing tumor cells. In addition, the activation of antigen-specific memory T cells provides long-lasting anti-tumor effects against the WT1-expressing tumor cells."