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CD127+CD94+ innate lymphoid cells expanded in Crohn’s disease patients highly express granulysin and perforin

ABSTRACT: Controversy in the identity and distinction of helper ILC1s and NK cells exist due to overlapping markers and the use of different gating strategies by distinct groups. Recently we identified cytotoxic ILC3s characterized by expression of CD94. Here we analyzed the full spectrum of CD127+ ILCs and NK cells in intestinal lamina propria from healthy donors and Crohn’s disease patients and identified two populations of CD127+CD94+ ILCs, designated A and B that could be distinguished on expression of CD117, CD18 and cytotoxic molecules. Population B highly expressed granulysin, a cytotoxic molecule linked to bacterial lysis and/or chemotaxis of monocytes. Granulysin protein was amply secreted by population B cells upon stimulation with IL-15. Activation of population B in the presence of TGF-β strongly reduced the expression of cytotoxic effector molecules of population B. Strikingly, samples from individuals that suffer from active Crohn disease displayed dramatically enhanced frequencies of granulysin expressing effector CD127+CD94+ ILCs compared to non-inflamed controls.

ORGANISM(S): Homo sapiens

PROVIDER: GSE173642 | GEO | 2021/10/13

REPOSITORIES: GEO

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Identification of human cytotoxic ILC3s

Project description:Human ILCs are classically categorized into five subsets; cytotoxic CD127-CD94+ NK cells and non-cytotoxic CD127+CD94-, ILC1s, ILC2s, ILC3s and LTi cells. Here, we identify a novel subset within the CD127+ ILC population, characterized by the expression of the cytotoxic marker CD94. These CD94+ ILCs strongly resemble conventional ILC3s in terms of phenotype, transcriptome and cytokine production, but are highly cytotoxic. IL-15 was unable to induce differentiation of CD94+ ILCs towards mature NK cells. Instead, CD94+ ILCs retained RORγt, CD127 and CD200R expression and produced IL-22 in response to IL-15. Culturing non-cytotoxic CD127+ ILC1s or ILC3s with IL-12 induced upregulation of CD94 and cytotoxic activity, effects that were not observed with IL-15 stimulation. Thus, human helper ILCs can acquire a cytotoxic program without differentiating into NK cells.

2020-09-14 | GSE147231 | GEO

CD127+CD94+ innate lymphoid cells expanded in Crohn’s disease patients highly express granulysin and perforin

Project description:CD127+CD94+ innate lymphoid cells expanded in Crohn’s disease patients highly express granulysin and perforin

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CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell chromatin histone modification assay

Project description:CUT and RUN was performed for 3 NK populations and found CD94+CD56hi NK cells exhibit unique H3K4me1, H3K4me4 enriched region, we also identified TCF7 binding region in CD94+CD56hi NK cells.

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CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell comparison

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CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell chromatin accessibility assay

Project description:ATAC-Seq was performed for 3 NK populations and found CD94+CD56hi NK cells exhibit unique chromatin accessible region

2019-12-10 | GSE122548 | GEO

CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell comparison

Project description:CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell comparison

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CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell chromatin accessibility assay

Project description:CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell chromatin accessibility assay

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CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell chromatin histone modification assay

Project description:CD94-CD56dim, CD94+CD56dim and CD94+CD56hi natural killer (NK) cell chromatin histone modification assay

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HIV-1 perturbs homeostatic ILCs, unmasks ILC1 plasticity, and boosts TCF7+ memory NK cells

Project description:Bulk RNA-seq, and single cell RNA-Seq using inDrops methodology, were used to compare two populations of cells that had been sorted by flow cytometry from human peripheral blood mononuclear cells (PBMCs) from two donors, G27 and G33. To sort the cells, PBMCs were stained with antibodies to 11 lineage markers (FITC), anti-CD56 (PE), and anti-CD94 (APC). The 11 lineage marker positive cells were excluded to identify the innate lymphocyte cell (ILC) population. Then we sorted the Lin-CD56+CD94- cells (CD127-ILC1s, 'neg') from the Lin-CD56+CD94+ cells (NK cells, 'pos') with a BD FACSAria IIu. Libraries were generated from each of these two populations.

2018-05-01 | GSE97727 | GEO

Unconventional ST2- and CD127-negative lung ILC2 populations are induced by Alternaria

Project description:Background: Alternaria exposure is associated with severe asthma in humans. Alternaria exposure in mice potently activates group 2 innate lymphoid cells (ILC2s) via the IL-33/ST2 axis and causes ILC2s to robustly secrete type 2 cytokines. Objective: Our aim was to determine whether conventionally used ILC2 markers, ST2 (IL-33R) and CD127 (IL-7Ra), were sufficient to identify all Th2-cytokine producing ILCs after Alternaria exposure. Methods: Mice received intranasal Alternaria for three days prior to analysis. Lung ILCs were identified by flow cytometry as CD45+Lineage−Thy1.2+ lymphocyte-sized cells, divided into four subsets based on ST2 and CD127 expression, and stained for intracellular cytokines and transcription factors. Sort-purified ILC subpopulations were also analyzed by RNA sequencing and qPCR. Results: Alternaria exposure led to accumulation of all ILC populations regardless of ST2 or CD127 expression. Nearly half of the GATA-3+, IL-5+, and IL-13+ ILCs were “unconventional” as they were either single or double negative for ST2/CD127. Further, these populations upregulated CD25, KLRG1, and ICOS after Alternaria challenge. Some activated unconventional IL-5+ ILC2s also produced IFNγ and IL-17A. In addition to shared ILC2 transcripts (Gata3, Il5, Il13) in all populations, RNA-seq further identified novel transcripts enriched in each subset. Finally, transcripts from all populations that correlated best with IL-5 and IL-13 production included Tnfrsf18, Ffar2, and Pde4b. Conclusions: Unconventional ST2- and CD127-negative mouse lung ILC2 populations are induced by Alternaria. Thus, commonly used lung ILC2 identification methods based on ST2 and CD127 do not accurately account for the total ILC2 burden and may exclude nearly half of these cells.

2019-08-22 | GSE136156 | GEO

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