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Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling [cytokine cultures]

ABSTRACT: RNA-sequencing of in vitro differentiated T cells cultured with varying cytokine conditions: IL-12, IL-12+IL-21, IL-1b+IL-6+IL-23, and TGFb+IL-6

ORGANISM(S): Mus musculus

PROVIDER: GSE202632 | GEO | 2022/05/11

REPOSITORIES: GEO

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Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling [in vitro]

Project description:Single-cell RNA-sequencing of in vitro differentiated T cells cultured with IL-12+IL-21+IL-23 (Th1 cell condition) or IL-1b+IL-6+IL-23 (pathogenic Th17 cell condition)

2021-05-01 | GSE164518 | GEO

Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling.

Project description:Interleukin-23 receptor plays a critical role in inducing inflammation and autoimmunity. Here, we report that Th1-like cells differentiated in vitro with IL-12 + IL-21 showed similar IL-23R expression to that of pathogenic Th17 cells using eGFP reporter mice. Fate mapping established that these cells did not transition through a Th17 cell state prior to becoming Th1-like cells, and we observed their emergence in vivo in the T cell adoptive transfer colitis model. Using IL-23R-deficient Th1-like cells, we demonstrated that IL-23R was required for the development of a highly colitogenic phenotype. Single-cell RNA sequencing analysis of intestinal T cells identified IL-23R-dependent genes in Th1-like cells that differed from those expressed in Th17 cells. The perturbation of one of these regulators (CD160) in Th1-like cells inhibited the induction of colitis. We thus uncouple IL-23R as a purely Th17 cell-specific factor and implicate IL-23R signaling as a pathogenic driver in Th1-like cells inducing tissue inflammation.

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Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-05-01 | GSE164520 | GEO

Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling [in vivo]

Project description:Th1 cells were adoptively transferred into RAG1 KO mice from either wildtype (Il23rwt/eGFP) or KO (Il23reGFP/eGFP) donors. At the peak of disease in recipients of wildtype cells, the animals were euthanized and intestinal T cells were isolated from the chosen recipients of both wildtype and KO cells for 10x massively parallel single-cell RNA-sequencing.

2021-05-01 | GSE164519 | GEO

Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling [cd160 knockout ex-vivo]

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Assessment of the impact of the IL23R R381Q variant in terms of IL-23-sensitive transcript induction

Project description:We stimulated T-cell blasts from IL23R R381Q homozygotes (n = 2), healthy controls homozygous for the ancestral allele (n = 9), homozygous individuals for TYK2 P1104A (n = 2) that selectively impairs responses to IL-23, and one patient each with autosomal recessive, complete TYK2 or IL-12Rb1 deficiency with IL-12, IL-23, IL-1b, and IL-1b plus IL-23 for 6 hours and performed RNA-sequencing. We used IL-1b as an IL-23-sensitizing agent as previously reported. We found that while T-cell blasts from IL23R R381Q homozygotes respond normally to IL-12 and IL-1b, their response to IL-23 and to IL-23 plus IL-1b is impaired

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Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling [cytokine cultures]

Project description:Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling [cytokine cultures]

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The inflammasome-activated cytokine IL-1 is targeted for ubiquitylation and proteasomal degradation to limit its inflammatory potential

Project description:Interleukin-1B (IL-1B) is pathologically activated by inflammasome-associated caspase-1 in rare autoinflammatory conditions and in wide-spread diseases. Therefore, IL-1B activity must be fine-tuned to enable anti-microbial responses whilst limiting collateral damage. Here we report that, relative to other inflammasome components, IL-1B is rapidly turned over by the proteasome and this correlates with its decoration by K11-, K63- and K48-linked ubiquitin chains. This IL-1 degradation signal is not only a feature of inflammasome priming but is also triggered upon inflammasome activation. We demonstrate that IL-1 K133 is modified by ubiquitin and forms a salt bridge with IL-1B D129. Loss of IL-1 K133 ubiquitylation, or disruption of the K133:D129 electrostatic interaction, stabilizes IL-1Bprotein levels. Accordingly, IL-1B K133R/K133R mice display increased precursor IL-1Bupon inflammasome priming and increased bioactive IL-1B following inflammasome activation, both in vitro and following LPS injection in vivo. These findings reveal new mechanisms for limiting IL-1B activity and safeguarding against damaging inflammation.

2021-04-01 | PXD021305 | Pride

Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling

Project description:Induction of a colitogenic phenotype in Th1-like cells depends on interleukin-23 receptor signaling

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Salmonella manipulates the host to drive pathogenicity via induction of interleukin 1β [16S]

Project description:Acute gastrointestinal infection with intracellular pathogens like Salmonella Typhimurium triggers the release of the proinflammatory cytokine interleukin 1β (IL-1β). However, the role of IL-1β in intestinal defense against Salmonella remains unclear. Here, we show that IL-1b production is detrimental during Salmonella infection. Mice lacking IL-1b (IL-1b -/-) failed to recruit neutrophils to the gut during infection, which reduced tissue damage and prevented depletion of short-chain fatty acid-producing commensals. Changes in epithelial cell metabolism that typically support pathogen expansion, such as switching energy production from fatty acid oxidation to fermentation, were absent in infected IL-1b -/- mice which inhibited Salmonella expansion. Additionally, we found that IL-1b induces expression of complement anaphylatoxins and suppresses the complement-inactivator Carboxypeptidase N (CPN1). Disrupting this process via IL-1b loss prevented mortality in Salmonella-infected IL-1b -/- mice. Finally, we found that IL-1b expression correlates with expression of the complement receptor in patients suffering from sepsis, but not uninfected patients and healthy individuals. Thus, Salmonella exploits IL-1b signaling to outcompete commensal microbes and establish gut colonization. Moreover, our findings identify the intersection of IL-1b signaling and the complement system as key host factors involved in controlling mortality during invasive Salmonellosis.

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