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- W4313368549 abstract "Abstract Type one diabetes (T1D) is a spontaneous autoimmune disease that results in pancreatic islet beta-cell death driven by diverse immune cells. However, molecular signatures of the leukocyte populations in T1D remain poorly defined. Here, using single-cell transcriptional analysis, we examined intra-islet leukocytes at various stages of disease: from its very early start, through its control phase and finally to the final effector stage. Early stages before clinical diagnosis are not accessible for human studies. We found that both CD4 and CD8 T cells showed heterogeneity at the initial stage of autoimmune inflammation and already contained effector cells. Moreover, the disease progression at all times was accompanied by regulatory sets establishing control mechanisms. In line with that, we also detected accumulation of anergic and exhaustion-associated phenotypes over time. Analysis of the islet macrophages showed substantial divergence, including novel population with anti-inflammatory and dead-cell clearance features. Autoimmune process resulted in polarization of islet macrophage into terminal pathogenic state via two-step activation program. While stage 1 marked by NF-kB activation was present in non-diabetic condition, stage 2 was inflammation-induced and had additional IFN-gamma activation. Interestingly, the final effector stages were not dominated by CD8 cytotoxic T cells but by pro-inflammatory macrophages. Overall, our analysis comprehensively describes stages of T1D on the basis of lymphoid and myeloid transcriptional activation programs, providing a detailed single-cell atlas of autoimmune diabetes initiation and development. Our findings will guide future studies in staging human T1D." @default.
- W4313368549 created "2023-01-06" @default.
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- W4313368549 date "2020-05-01" @default.
- W4313368549 modified "2023-09-26" @default.
- W4313368549 title "Single-cell RNA sequencing of pancreatic islets reveals the complexity of autoimmune diabetes throughout its initiation and development" @default.
- W4313368549 doi "https://doi.org/10.4049/jimmunol.204.supp.142.13" @default.
- W4313368549 hasPublicationYear "2020" @default.
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