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- W4313359938 abstract "Abstract The small intestine (SI) represents the largest mucosal barrier between the environment and the host. As such, the SI limits both normal and pathogenic microbe invasion and must balance immune tolerance and activation. CD8ab T cells constitute a dominant lymphocyte population in the SI and contribute to both of these processes but detailed investigation into their in situ behavior in response to various stimuli is lacking. We visualized Ag-specific CD8 T cell migration in the SI using two-photon microscopy to understand CD8 T cell immunosurveillance. We found that pathogen-specific CD8 T cells are initially slowed early after infection but regain motility directly after Ag clearance. At a memory time point, CD8 T cells exhibited slower migration concurrent with acquisition of a resident memory phenotype. Current studies are focused on determining what is required for CD8 T cell motility throughout the course of infection. Additionally, as tolerance reversal and expansion of self-specific CD8 T cells has recently become a focus of cancer therapy, we characterized in situ behavior of self-specific CD8 T cells. Using a mouse expressing a model Ag in the SI as a self-protein, we observed self-specific CD8 T cells before and after tolerance reversal. Tolerant CD8 T cells migrate significantly faster than pathogen-specific cells at acute time points after infection. Contrastingly, ex-tolerant CD8 T cells were comparable to pathogen-specific CD8 T cells indicating that indeed their in situ scanning behavior had been altered upon tolerance reversal. These observations have provided valuable insight into CD8 T cell motility within the SI and can inform targeted treatment options and vaccines to ensure effective immunosurveillance of this tissue." @default.
- W4313359938 created "2023-01-06" @default.
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- W4313359938 date "2017-05-01" @default.
- W4313359938 modified "2023-09-29" @default.
- W4313359938 title "Visualizing antigen-specific CD8 T cell dynamics in the small intestine" @default.
- W4313359938 doi "https://doi.org/10.4049/jimmunol.198.supp.62.1" @default.
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