Transcriptional characterization of intestinal ILC3 lacking BMAL1
Ontology highlight
ABSTRACT: Small intestinal group 3 innate lymphoid cells (ILC3) from ILC3-conditional BMAL1 knock out mice or littermate control mice were sort-purified for transcriptional analysis
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.
Project description:Ror gamma t-deficient mice lack group 3 Innate Lymphoid Cells (ILC3s) and as a result have increased tissue damage and diminished tissue repair in response to insult. To identify repair programs associated with ILC3 presence the transcriptomes of small intestinal stem cells exposed to damage in the presence or absence of ILC3 were compared. Small intestinal damage was induced in Ror gamma t-deficient Lgr5 reporter mice and littermate controls. Small intestinal epithelial stem cells were purified at days 1 and 4 after damage and subjected to RNA sequencing.
Project description:Interleukin-(IL) 22 production by intestinal group 3 innate lymphoid cells (ILC3) is critical to maintain gut homeostasis. However, IL-22 needs to be tightly controlled; reduced IL-22 expression is associated with intestinal epithelial barrier defect while its overexpression promotes tumor development. Here, using a single cell RNAseq approach, we identified a core set of genes associated with increased IL-22 production by ILC3.
Project description:To determine the unique gene expression profile of central nervous system (CNS)-associated ILC3, we performed RNA-sequencing on sort-purified ILC3 from the CNS, cervical lymph nodes (cLN) and small intestine lamina propria (SI-LP) during EAE.
Project description:Autoimmune regulator (Aire) plays an indispensable role in the induction of central immune tolerance. We identify a novel subset of Rorγt-dependent innate lymphoid cell-type in secondary lymphoid organs, which presents endogenously generated antigens and contributes to peripheral T cell tolerance. In this experiment, transcriptomes of these Aire-ILC3 cells are characterized in wild-type Balb/C and Aire-/- Balb/C mice [Ramsey, C. et al. (2002) Hum Mol Genet 11:397-409] using RNA-seq method. To obtain the cells, peripheral lymph nodes were minced, enzymatically digested, and Aire-ILC3 cells were FACS-sorted as Lin-, MHCII+, CD80+, IL7Ra+ cells.
Project description:Type-3 innate lymphoid cells (ILC3) regulate homeostasis and orchestrate immunity in the intestine, mediated in part by their bi-directional communication with the intestinal epithelium. In order to define specific interactions between these two compartments, we used a reductionist co-culture system of murine epithelial small intestinal organoids (SIO) with ILC3. The transcriptomic profile of epithelial cells from these co-cultures was analysed by bulk RNAseq.
Project description:Innate lymphoid cells (ILCs) have emerged as essential players in the skin-associated immune system in health and inflammatory skin diseases. Their low numbers and lack of specific markers hampered extensive characterization and consequently resulted in limited knowledge of their protein expression. Here, we combined flow cytometry and state-of-the-art proteomics to comprehensively describe the proteins constitutively expressed by ILC2 and ILC3 subsets derived from healthy human skin and peripheral blood. We quantified 6666 proteins from skin ILC and identified 608 differentially expressed proteins in the investigated subsets. In addition to the current analyses, highlighting new functions of ILC, the ILC proteomic libraries and the proteomes of the ILC2 and ILC3 subsets will serve as valuable resources for future analyses of ILC function and are available at http://skin.science.
Project description:TMT analysis of proteomic changes in the gastrocnemius skeletal muscles of WT and Bmal1-KO mice, and Bmal1-KO mice rescued with AAV-mediated muscle-specific expression of Bmal1.
Project description:CCR6+ innate lymphoid cells were sorted from the mesenteric lymph node of naïve C57BL/6 mice Cells were sort purified as lineage negative, CD127+ CD90.2+ CCR6+ ST2- 4 replicates were performed