The outcome of a particular T cell based immune response is likely to be determined by the balance between the effector and regulatory T cell pools.
HIV may be acting as an indirect co-factor in the etiology of Burkitt lymphoma by reducing the effectiveness of T cell based immune response to oncogenic viruses [28] or by reducing the EBV-specific T cell function, leading to proliferation of EBV infected B cells and eventual tumor formation [29].
Ad serotype 5 has been the most widely used Ad vector because of earlier, historical development, its important safety profile and its remarkable capacity to induce strong, long-lasting and broad T-cell based immune responses, in particular CD8+ driven ones [ 2].
To determine if the increased protection after B7.1-expressing tumor immunization was mediated by a T-cell based immune response, we used mAbs to deplete CD8+ or CD4+ T cells in C57BL/6 mice before immunization and tumor cell challenge.
Thus, expression of both genes in tumor cells can facilitate the induction phase of the T-cell based immune response.
The mechanisms that govern the potent therapeutic responses to the intermittent metronomic CPA used here are only partially understood, but most likely involve immunogenic cell death [ 69, 70, 109], which can stimulate dendritic cell and CD8-T cell-based immune responses leading to long-term immunity [ 16].
In turn, it activates dendritic cells and enhances their processing and presentation of several different tumor antigens, thus inducing a number of T-cell-based immune responses.
In this diagram, the Jantibody fusion protein, combining an antibody fragment targeting an antigen found on tumor cells with an immune-response-inducing protein, activates dendritic cells against several tumor antigens and induces a number of T-cell-based immune responses.
Priming T cell generation is a key initial step in T cell-based immune responses against tumor cells and pathogens [18], [25].
28 Ad serotype 5 has been the most widely used Ad vector, displaying a good safety profile and a remarkable capacity to induce long-lasting and broad T cell-based immune responses, in particular those driven by CD8+.
