Altered peptide ligand vaccination with Flt3 ligand expanded dendritic cells for tumor immunotherapy

Altered peptide ligand vaccination with Flt3 ligand expanded dendritic cells for tumor immunotherapy.

Most tumor-associated antigens represent self-proteins and as a result are poorly immunogenic due to immune tolerance. Here we show that tolerance to carcinoembryonic antigen (CEA), which is overexpressed by the majority of lethal malignancies, can be reversed by immunization with a CEA-derived peptide. This peptide was altered to make it a more potent T cell antigen and loaded onto dendritic c...

Active Immunotherapy with Flt3-Ligand Mobilized Peripheral Blood Dendritic Cells Loaded With Carcinoembryonic Antigen Peptide in Patients with Metastatic Malignancies

Background: Dendritic cells (DC) loaded with tumor antigens induce immune responses in some cancer patients. However, the most commonly used method for obtaining clinical grade DC requires in vitro generation over 7 days in media containing cytokine, increasing the complexity and cost of the cellular vaccine product. The cytokine Flt3-ligand (FL) increases peripheral blood DC numbers in humans ...

Dendritic Cell Maturation with CpG for Tumor Immunotherapy

Background: Bacterial DNA has immunostimulatory effects on different types of immune cells such as dendritic cells (DCs). Application of DCs as a cellular adjuvant represents a promising approach in the immunotherapy of infectious disease and cancers. Objectives: To investigate the effect of tumor antigen pulsed DCs in the presence of CpG-1826 in treatment of a murine model of cancer. Methods: ...

Altered Peptide Ligand-Mediated TCR

Flt3 Ligand Regulates Dendritic Cell Development from Flt3+ Lymphoid and Myeloid-committed Progenitors to Flt3+ Dendritic Cells In Vivo

Stimulation of Flt3 receptor tyrosine kinase through its cognate ligand expands early hematopoietic progenitor and dendritic cells (DCs) in humans and mice. The exact developmental stages at which hematopoietic progenitors express Flt3, are responsive to its ligand, and subsequently develop to DCs, are not known. Here we show that common lymphoid and common myeloid progenitors, as well as stead...