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Maternal antibiotic exposure enhances neonatal ILC2 responses and aggravates allergic airway inflammation in adults [ATAC-seq]

ABSTRACT: Maternal antibiotic exposure enhances neonatal ILC2 responses and aggravates allergic airway inflammation in adults [ATAC-seq]

PROVIDER: PRJNA1012493 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25893080_1.fastq.gz	Fastqsanger.gz
	SRR25893080_2.fastq.gz	Fastqsanger.gz
	SRR25893081_1.fastq.gz	Fastqsanger.gz
	SRR25893081_2.fastq.gz	Fastqsanger.gz
	SRR25893082_1.fastq.gz	Fastqsanger.gz

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Maternal antibiotic exposure enhances neonatal ILC2 responses and aggravates allergic airway inflammation in adults

Project description:Maternal antibiotic exposure enhances neonatal ILC2 responses and aggravates allergic airway inflammation in adults

| PRJNA970067 | ENA

Maternal antibiotic exposure enhances neonatal ILC2 responses and aggravates allergic airway inflammation in adults

Project description:The maternal microbiota plays an important role in shaping and priming infant immunity, although the cellular and molecular mechanisms underlying these effects remain obscure. Here we report that prenatal antibiotic exposure caused significant elevation of group 2 innate lymphoid cells (ILC2s) in neonatal lungs, in both cell numbers and functionality. Downregulation of type 1 interferon signaling in ILC2s caused by diminished production of microbiota-derived metabolite butyrate represents the underlying mechanism. Mice lacking butyrate receptor GPR41 (GPR41-/-) or type 1 interferon receptor (Ifnar1-/-) recapitulated the phenotype of neonatal ILC2s upon maternal antibiotic exposure. Furthermore, prenatal antibiotic exposure induced persistent epigenetic changes in ILC2s and had a long-lasting deteriorative effect on allergic airway inflammation in adulthood. Prenatal supplementation with butyrate ameliorated airway inflammation in adult offspring born to antibiotic-exposed dams. These observations demonstrate an essential role for the maternal microbiota in the control of type 2 innate immunity at the neonatal stage, which provides a therapeutic window for treating asthma in early life.

2023-05-08 | GSE231887 | GEO

Maternal antibiotic exposure enhances neonatal ILC2 responses and aggravates allergic airway inflammation in adults [ATAC-seq]

Project description:Disruption of circadian rhythm during pregnancy produced adverse health outcomes in offspring. However, the role of maternal circadian rhythms in infants’ immunity and their susceptibility to inflammation remains poorly understood. Here we reported that disruption of circadian rhythms in pregnant mice profoundly aggravated the severity of neonatal inflammatory disorders, including necrotizing enterocolitis (NEC) and sepsis. The diminished production of maternal-derived docosahexaenoic acid (DHA) and the impaired immunosuppressive function of myeloid-derived suppressor cells (MDSCs) in neonates played a dominant role in this process. Mechanistically, DHA enhanced the immunosuppressive function of neonatal MDSCs viaPPARγ mediated mitochondrial oxidative phosphorylation. Transfer of MDSCs or perinatal supplementation of DHA relieved neonatal inflammation induced by maternal rhythms disruption. These observations revealed an important role of maternal circadian rhythms in the control of neonatal inflammation via metabolic reprograming of myeloid cells.

2023-09-08 | GSE242246 | GEO

BET bromodomain inhibitor iBET151 impedes human ILC2 activation and prevents experimental allergic lung inflammation

Project description:Group 2 innate lymphoid cells (ILC2) increase in frequency in eczema and allergic asthma patients, and thus represent a new therapeutic target cell for type-2 immune-mediated disease. The bromodomain and extra-terminal (BET) protein family of epigenetic regulators are known to support the expression of cell cycle and pro-inflammatory genes during type-1 inflammation, but have not been evaluated in type-2 immune responses. We isolated human ILC2 and examined the capacity of the BET protein inhibitor, iBET151, to modulate human ILC2 activation following IL-33 stimulation. iBET151 profoundly blocked expression of genes critical for type-2 immunity, including type-2 cytokines, cell surface receptors and transcriptional regulators of ILC2 differentiation and activation. Furthermore, in vivo administration of iBET151 during experimental mouse models of allergic lung inflammation potently inhibited lung inflammation and airways resistance in response to cytokine or allergen exposure. Thus, iBET151 effectively prevents human ILC2 activation and dampens type-2 immune responses.

2019-03-23 | GSE128735 | GEO

E-protein inhibition in ILC2 development shapes the function of mature ILC2s during allergic airway inflammation

Project description:E-protein transcription factors (TFs) limit group 2 innate lymphoid cell (ILC2) development while promoting T cell differentiation from common lymphoid progenitors (CLPs). Inhibitors of DNA-binding (Id) proteins block E-protein DNA binding in CLPs to allow ILC2 development. However, whether E-proteins influence ILC2 function upon maturity and activation remains unclear. Mice that overexpress Id1 under control of the thymus-restricted proximal Lck promoter (Id1tg/WT) have a large pool of primarily thymus-derived ILC2s in the periphery that develop in the absence of E-protein activity. We used these mice to investigate how the absence of E-protein activity affects ILC2 function and genomic landscape in response to house dust mite (HDM) allergens. Id1tg/WT mice had increased Klrg1- ILC2s in the lung compared to wild type (WT, Id1WT/WT) mice in response to HDM, but Id1tg/WT ILC2s had an impaired capacity to produce type 2 cytokines. Analysis of WT ILC2 accessible chromatin suggested that AP-1 and C/EBP TFs but not E-proteins were associated with ILC2 inflammatory gene programs. Instead, E-protein binding sites were enriched at functional genes in ILC2s during development that were later dynamically regulated in allergic lung inflammation, including genes that control ILC2 response to cytokines and interactions with T cells. Finally, ILC2s from Id1tg/WT compared to WT mice had fewer regions of open chromatin near functional genes that were enriched for AP-1 factor binding sites following HDM treatment. These data show that E-proteins shape the chromatin landscape during ILC2 development to dictate the functional capacity of mature ILC2s during allergic inflammation in the lung.

2021-10-18 | GSE185950 | GEO

Amino acid availability acts as a metabolic rheostat to determine the magnitude of ILC2 responses - WT ILC2

Project description:Group 2 innate lymphoid cells (ILC2) are functionally poised, tissue-resident lymphocytes that respond rapidly to damage and infection at mucosal barrier sites. ILC2 reside within complex microenvironments where they are subject to cues from both the diet and invading pathogens – including helminths. Emerging evidence suggests ILC2 are acutely sensitive not only to canonical activating signals, but also perturbations in nutrient availability. In the context of helminth infection, we identify amino acid availability as a nutritional cue in regulating ILC2 responses. ILC2 were found to be uniquely pre-primed to import amino acids via the large neutral amino acid transporters Slc7a5 and Slc7a8. Cell-intrinsic deletion of these transporters individually impaired ILC2 expansion, while concurrent loss of both transporters markedly impaired the proliferative and cytokine producing capacity of ILC2. Moreover, amino acid determined the magnitude of ILC2 responses in part via tuning of mTOR. These findings implicate essential amino acids as a metabolic requisite for optimal ILC2 responses within mucosal barrier tissues.

2022-12-22 | PXD038792 | Pride

Dendritic cells mediated by small extracellular vesicles derived from MSCs attenuated the ILC2 activity in patients with allergic rhinitis

Project description:Mesenchymal stromal cells-derived small extracellular vesicles (MSC-sEVs) have recently attracted considerable attention because of their therapeutic potential in various immune diseases. We previously reported that MSC-sEVs could exert immunomodulatory roles in allergic airway inflammation by regulating group 2 innate lymphoid cell (ILC2) and dendritic cell (DC) functions. Therefore, this study aimed to investigate the therapeutic effects of MSC-sEVs on mature DC (mDC)-ILC2 interplay in allergic rhinitis (AR). Here, we isolated MSC-sEVs from induced pluripotent stem cells (iPSC)-MSCs using anion-exchange chromatography for the generation of sEV-mDCs. sEV-mDCs were co-cultured with peripheral blood mononuclear cells (PBMCs) from patients with AR or purified ILC2s. The levels of IL-13 and GATA3 in ILC2s were examined by flow cytometry. Bulk RNA-sequence for mDCs and sEV-mDCs was employed to further probe the potential mechanisms, which were then validated in the co-culture systems.

2023-06-27 | GSE229003 | GEO

Disturbed LTB4 metabolism in ILC2 Aggravates Ulcerative Colitis via intercellular ATP accumulation

Project description:LTB4 biosynthesis is critically required for cytokine secretion by the group 2 innate lymphoid cell (ILC2), though its underlying regulatory mechanisms remain incompletely characterized. To investigate how LTB4 governs ILC2 functionality, we performed RNA sequencing on sorted murine colonic ILC2s treated with or without SC-57461A—an inhibitor targeting LTA4H, the key enzyme in LTB4 anabolism. This dataset delineates transcriptomic profiles of ILC2 with pharmacologically attenuated versus intact LTB4 synthesis. Here, we identify significant alterations in mitochondria-associated genes (including Fdps, Hmgcs1, and Acat3) upon suppression of LTB4 anabolism in ILC2. These genes encode proteins essential for mitochondrial function and are indispensable for ILC2 energy metabolism. These findings collectively demonstrate that LTB4 synthesis orchestrates mitochondrial functionality in ILC2, thereby modulating their bioenergetic capacity.RNA sequencing was performed for the SC-57461A- or vehicle-treated ILC2 sorted from the large intestine of C57BL/6 mice (n = 4 per group).

2025-08-12 | GSE304475 | GEO

Disturbed LTB4 metabolism in ILC2 Aggravates Ulcerative Colitis via intercellular ATP accumulation

Project description:Disturbed LTB4 metabolism in ILC2 Aggravates Ulcerative Colitis via intercellular ATP accumulation

| PRJNA1301361 | ENA

Expression data from WT and KO of Myc in innate lymphoid cell 2 (ILC2) in mice

Project description:Group-2 innate lymphoid cells (ILC2) serve crucial function in allergy and asthma. Activated ILC2 rapidly proliferate and secret large amounts of type-2 cytokines, such as IL-5 and IL-13. Mechanisms underlying still remain ambiguous. Here we report that Myc is required for ILC2 proliferation and activation in allergic airway inflammation. Inhibition of Myc impair the ILC2 proliferation in vivo and prevented ILC2-mediated airway hyperresponsiveness in vivo. We used microarrays to detail the global programme of different gene expression between WT and Myc KO in ILC2.

2020-01-01 | GSE129309 | GEO

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