Abstract
There are numerous cell types with scarcely understood functions, and whose interactions with the immune system are not well characterized. To facilitate their study, we generated a mouse bearing enhanced green fluorescent protein (EGFP)-specific CD8+ T-cells. Transfer of the T-cells into EGFP reporter animals killed GFP-expressing cells, allowing selective depletion of desired cell types, or interrogation of T-cell interactions with specific populations. Using this system, we eliminate HCN4+ GFP-expressing cells in the heart and elicit their importance in cardiac function. We also show that naïve T-cells are recruited into the mouse brain by antigen-expressing microglia, providing evidence of an immune surveillance pathway in the central nervous system. The just EGFP death-inducing (JEDI) T-cells enable visualization of a T-cell antigen. They also make it possible to utilize hundreds of GFP-expressing mice, tumors, and pathogens, to study T-cell interactions with virtually any cell type, to model disease states, or to determine the functions of poorly characterized cell populations.
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