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ST2+ T-regulatory Cells in Renal Inflammation and Fibrosis following Ischemic Kidney Injury

ABSTRACT: Here, we delineated the role of the ST2 specifically in Treg cells, using murine renal injury models and kidney organoids.

ORGANISM(S): Mus musculus

PROVIDER: GSE224295 | GEO | 2024/08/27

REPOSITORIES: GEO

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ST2+ T-regulatory Cells in Renal Inflammation and Fibrosis following Ischemic Kidney Injury

Project description:The role of IL-33 and its receptor ST2 in kidney injury is not well understood. This study demonstrates the importance of ST2 expression on the T-regulatory cells (Tregs) for the resolution of renal injury by suppressing inflammation and fibrosis. Treg-specific deletion of ST2, detrimentally impacted late outcomes of renal injury worsening the impairment of kidney function, inflammation, and fibrosis.

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ST2+ T-regulatory Cells in Renal Inflammation and Fibrosis following Ischemic Kidney Injury

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Transcriptional profiling of mouse ST2+ and ST2- Tregs across tissues

Project description:Foxp3+ regulatory T cells (Tregs) are critical mediators of peripheral tolerance and immune homeostasis. Tregs that express the IL-33 receptor ST2 are enriched in peripheral nonlymphoid tissues and can exert a variety of tissue-specific functions from metabolic regulation within adipose tissue to skeletal muscle repair. However, the relationship between ST2+ and ST2- Tregs within and across different tissues remains unclear. To compare murine ST2- and ST2+ Tregs within and across tissues, we performed RNA sequencing (RNAseq) of ST2-CD44hi and ST2+CD44hi Tregs from blood, spleen, lungs, visceral adipose tissue (VAT), colon, and skin. RNAseq was also performed on ST2- CD44lo CD62L+ Tregs from the spleen and lungs. We found that the tissue microenvironment was the major factor shaping the transcriptome of Tregs across tissues. Across the tissues studied, Treg transcriptomes displayed an ordered hierarchy that may represent graded levels of activation or differentiation across tissues. We also identified a core signature that distinguished ST2+ Tregs from ST2- Tregs across tissues and a large number of differentially expressed genes between ST2- and ST2+ Tregs within individual tissues that could support the tissue-specific adaptation and function of ST2+ Tregs. In summary, our work highlights the unique, tissue-specific phenotype of ST2+ Tregs and reveals a core ST2+ Treg transcriptional signature shared across tissues.

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Project description:Bcl6 play a key role in CD4+ T cell development including follicular regulatory T cells. However, the role of Bcl6 in Treg cells in context of allergic inflammation was not fully understood. In this study, we describe the role of Bcl6 in development and function of ST2+Treg cells by analyzing ST2+Treg cell RNA seq.

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RNA-Sequencing of ST2+ Treg cells in response to IL-33 stimulation

Project description:The effects of IL-33 on ST2+ Treg cells were not studied thouroughly. We FACS-sorted in vitro expanded ST2+ Treg cells from C57BL/6 Foxp3-IRES-mRFP (B6 FIR) mice. We next used RNA-seq techonology to define how recombinant IL-33 (rIL-33) may impact mouse Treg by to assessing the transcriptome of IL-33-stimulated ST2+ Treg cells compared to that of untreated ST2+ Treg cells. Our data revealed that ST2+ Treg stimulated with rIL-33 for 6 hours exhibited increased expression of Il10 and Il13 compared to unstimulated ST2+ Treg cells.

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Characterization of ST2+ and ST2- mTh cells in helminth infection

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Role of ST2 expession in regulatory Tcells on muscle regneration

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