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The Transcription Factor ThPOK Regulates ILC3 Lineage Homeostasis and Function during Intestinal Infection II

ABSTRACT: To investigate the role of ThPOK in the regulation of ILC3 development and function, we established conventional ThPOK knockout mice and carried out single-cell RNA sequencing (BD Rhapsody) on intestinal ILC3s.

ORGANISM(S): Mus musculus

PROVIDER: GSE204698 | GEO | 2022/06/28

REPOSITORIES: GEO

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The Transcription Factor ThPOK Regulates ILC3 Lineage Homeostasis and Function during Intestinal Infection

Project description:To investigate the role of ThPOK in the regulation of ILC3 development and function, we established conventional ThPOK knockout mice.

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Cxxc finger protein 1 maintains homeostasis and function of intestinal group 3 innate lymphoid cells with aging

Project description:To investigate the role of aging in the regulation of ILC3 development and function, we used aged mice and carried out single-cell RNA sequencing (BD Rhapsody) on aged gut ILC3s.

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Cxxc finger protein 1 maintains homeostasis and function of intestinal group 3 innate lymphoid cells with aging (Cxxc1-deficient mice)

Project description:To investigate the role of Cxxc1 in the regulation of ILC3 development and function, we used Cxxc1flox/floxRorccre mice and carried out single-cell RNA sequencing (BD Rhapsody) on small intestinal ILC3s.

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Cxxc finger protein 1 maintains homeostasis and function of intestinal group 3 innate lymphoid cells with aging [control scRNA-seq]

Project description:To investigate the role of aging in the regulation of ILC3 development and function, we used the young mice as control and carried out single-cell RNA sequencing (BD Rhapsody) on young gut ILC3s.

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The Transcription Factor ThPOK Regulates ILC3 Lineage Homeostasis and Function during Intestinal Infection

Project description:The Transcription Factor ThPOK Regulates ILC3 Lineage Homeostasis and Function during Intestinal Infection

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The Transcription Factor ThPOK Regulates ILC3 Lineage Homeostasis and Function during Intestinal Infection II

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PD-1 regulates ILC3-driven intestinal immunity and homeostasis

Project description:PD-1 is constitutively expressed on a fraction of ILC3 in the gut. To identify the transcriptional differences between PD1+ and PD1- ILC3, we have sorted these subsets and analysed their transcriptional regulation by RNA-Seq.

2024-02-29 | GSE254794 | GEO

Group 3 innate lymphoid cells continuously require the transcription factor GATA3 after commitment

Project description:GATA3 is indispensable for the development of all IL-7RÎ±-expressing innate lymphoid cells (ILCs) and maintenance of type 1 ILCs (ILC1s) and type 2 ILCs (ILC2s). However, the importance of low GATA3 expression in type 3 ILCs (ILC3s) is still elusive. Here, we report that GATA3 regulates homeostasis of ILC3s by controlling IL-7RÎ± expression. In addition, GATA3 is critical for the development of NKp46+ ILC3 subset partially through regulating the balance between T-bet and RORÎ³t. Genome-wide analyses indicate that while GATA3 positively regulates CCR6+ and NKp46+ ILC3 subset-specific genes in respective lineages, it negatively regulates CCR6+ ILC3-specific genes in NKp46+ ILC3s. Furthermore, GATA3 regulates IL-22 production in both CCR6+ and NKp46+ ILC3s. Thus, low GATA3 expression is critical for the development and function of ILC3 subsets. To identify GATA3 regulated genes in total ILC3s with RNA-Seq; To identify unique genes expressed by CCR6+ ILC3 or NKp46+ ILC3 and GATA3 regulated genes within these two ILC3 subsets with RNA-Seq; To identify GATA3 direct binding sites in ILC3s, ILC2s and Th2 cells with ChIP-Seq.

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Trained ILC3 Responses Promote Intestinal Defense

Project description:Group 3 innate lymphoid cells (ILC3) are innate immune effectors that contribute to host defense. Whether ILC3 functions are stably modified following pathogen encounter is unknown. Here we assess the impact of a time-restricted enterobacterial challenge to long-term ILC3 activation. We found that intestinal ILC3 persist for months in an activated state following exposure to Citrobacter rodentium. Upon rechallenge, these “trained” ILC3 proliferate, display enhanced interleukin (IL)-22 responses, and have a superior cell-intrinsic capacity to control infection compared to naïve ILC3. Metabolic changes occur in C. rodentium-exposed ILC3 but only trained ILC3 have enhanced proliferative capacity that contributes to elevated IL-22 production. Accordingly, a limited encounter with a pathogen can promote durable phenotypic and functional changes in intestinal ILC3 that contribute to long-term mucosal defense.

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Transcriptional impact of iron in ILC3 [RNA-seq]

Project description:Iron metabolism is pivotal for cell fitness in the mammalian host. However, its role in group 3 innate lymphoid cells (ILC3s) is unknown. Here we show that transferrin receptor CD71-mediated iron metabolism cell-intrinsically controls ILC3 maintenance, cytokine production and host protection against Citrobacter rodentium infection, and metabolically affects mitochondrial respiration by switching of oxidative phosphorylation toward glycolysis. Iron deprivation or Tfrc deficiency reduces the expression and/or activity of the aryl hydrocarbon receptor (Ahr), a ligand-dependent transcription factor and a key ILC3 regulator. Furthermore, consistent with its role in generation of Ahr ligand, microbiome exerts a negative impact on CD71 expression in an Ahr-dependent manner. Genetic ablation or activation of Ahr in ILC3s leads to CD71 upregulation or downregulation, respectively, suggesting an active suppression of CD71 by Ahr. Iron overload partially restores defective ILC3 compartment in the small intestine of Ahr-deficient mice, representing compensatory action of CD71 upregulation during Ahr deficiency. Mechanistically, Ahr directly binds to the promoter region of the Tfrc locus to inhibit Tfrc transcription. These data collectively demonstrate an under-appreciated role of the Ahr-CD71-iron axis in regulation of ILC3 maintenance and function.

2023-07-10 | GSE222619 | GEO

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