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Skin and gut imprinted T helper cell subsets exhibit distinct functional phenotypes in CNS autoimmunity

ABSTRACT: Skin and gut imprinted T helper cell subsets exhibit distinct functional phenotypes in CNS autoimmunity

PROVIDER: PRJNA718463 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14102354_1.fastq.gz	Fastqsanger.gz
	SRR14102354_2.fastq.gz	Fastqsanger.gz
	SRR14102355_1.fastq.gz	Fastqsanger.gz
	SRR14102355_2.fastq.gz	Fastqsanger.gz
	SRR14102356_1.fastq.gz	Fastqsanger.gz

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Skin and gut imprinted T helper cell subsets exhibit distinct functional phenotypes in central nervous system autoimmunity

Project description:Skin and gut imprinted T helper cell subsets exhibit distinct functional phenotypes in central nervous system autoimmunity

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Skin and gut imprinted T helper cell subsets exhibit distinct functional phenotypes in CNS autoimmunity

Project description:We developed an experimental framework to probe the idea that the site of priming in the systemic immune compartment is a determinant of T helper cell-induced immunopathology in remote organs. By site-specific in vivo labeling of antigen-specific T cells in inguinal (i) or gut draining mesenteric (m) lymph nodes, we show that i-T cells and m-T cells isolated from the inflamed central nervous system in a model for Multiple Sclerosis are distinct.

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Sex-specific control of CNS autoimmunity by p38 MAPK signaling in myeloid cells

Project description:Objective: Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS), characterized by a global increasing incidence driven by relapsing-remitting disease in females. p38 MAP kinase (MAPK) has been described as a key regulator of inflammatory responses in autoimmunity, but its role in the sexual dimorphism in MS or MS models remains unexplored. Methods: Toward this end, we used experimental autoimmune encephalomyelitis (EAE), the principal animal model of MS, combined with pharmacologic and genetic inhibition of p38 MAPK activity and transcriptomic analyses. Results: Pharmacologic inhibition of p38 MAPK selectively ameliorated EAE in female mice. Conditional deletion studies demonstrated that p38M-NM-1 signaling in macrophages/myeloid cells, but not T cells or dendritic cells, recapitulated this sexual dimorphism. Analysis of CNS inflammatory infiltrates showed that female, but not male mice lacking p38M-NM-1 in myeloid cells exhibited reduced immune cell activation compared with controls, while peripheral T cell priming was unaffected in both sexes. Transcriptomic analyses of myeloid cells revealed differences in p38M-NM-1-controlled transcripts comprising female- and male-specific gene modules, with greater p38M-NM-1 dependence of pro-inflammatory gene expression in females. Interpretation: Our findings demonstrate a key role for p38M-NM-1 in myeloid cells in CNS autoimmunity and uncover important molecular mechanisms underlying sex differences in disease pathogenesis. Taken together, our results suggest that the p38 MAPK signaling pathway represents a novel target for much needed disease modifying therapies for MS WT vs. p38alphaCKO macrophages, male vs. female

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Skin and gut imprinted helper T cell subsets exhibit distinct functional phenotypes in central nervous system autoimmunity.

Project description:Multidimensional single-cell analyses of T cells have fueled the debate about whether there is extensive plasticity or 'mixed' priming of helper T cell subsets in vivo. Here, we developed an experimental framework to probe the idea that the site of priming in the systemic immune compartment is a determinant of helper T cell-induced immunopathology in remote organs. By site-specific in vivo labeling of antigen-specific T cells in inguinal (i) or gut draining mesenteric (m) lymph nodes, we show that i-T cells and m-T cells isolated from the inflamed central nervous system (CNS) in a model of multiple sclerosis (MS) are distinct. i-T cells were Cxcr6+, and m-T cells expressed P2rx7. Notably, m-T cells infiltrated white matter, while i-T cells were also recruited to gray matter. Therefore, we propose that the definition of helper T cell subsets by their site of priming may guide an advanced understanding of helper T cell biology in health and disease.

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