Research Projects

CD8+ T cells persistently exposed to antigen, such as during chronic viral infections and in tumors, undergo substantial functional and phenotypic changes, a state widely known as T cell ‘exhaustion’. This includes impairments in effector function and elevated expression of inhibitory receptors such as PD-1. Inhibitory receptors constitute critical checkpoints in T cell activation and their expression represents a major mechanism by which T cell proliferation and function are limited. Blocking the activity of PD-1 augments T cell mediated immunity and has revolutionized our approach to the treatment of many cancers. However, despite the unparalleled success of this so-called checkpoint blockade, it does not revert the functional impairments linked to T cell exhaustion, which constitutes a critical limitation in utilizing the full potential of the body’s immune response.

Our group studies the mechanisms inducing T cell exhaustion with the ultimate goal to identify targets that can lead to the design and development of novel therapeutic treatments to improve health of patients suffering from chronic infections or cancer.