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ABSTRACT: The gut metagenome of experimental autoimmune uveitis mice

PROVIDER: PRJNA1261602 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR33517200_1.fastq.gz	Fastqsanger.gz
	SRR33517200_2.fastq.gz	Fastqsanger.gz
	SRR33517201_1.fastq.gz	Fastqsanger.gz
	SRR33517201_2.fastq.gz	Fastqsanger.gz

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Project description:miRNA expression profiling of CD4+ T cells comparing naïve mice and experimental autoimmune uveitis (EAU) mice. EAU was induced by immunization of retinal antigen (IRBP1-20) in complete Freund’s adjuvant (CFA). CD4+ T cells were isolated and purified from the spleen and draining lymph nodes 13 days after immunization.

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Project description:In this study, we found that microglia have a considerable number of cells compared to T cells, indicating an equally critical role of microglia in the progression of autoimmune uveitis. We further identified a specific microglial subpopulation expressed with high levels of CD74 and CCL5, which may be directly related to inflammation regulation in autoimmune uveitis and named inflammation-associated microglia (IAMs). Decreasing the number of IAMs by gene regulation methods or CD74/CCL5 neutralizing antibodies effectively reduced inflammation in EAU mice and delayed disease progression. A mechanistic study indicated that the CD74/CCL5 axis was mainly responsible for the regulation of the immune response in autoimmune uveitis. The intracytoplasmic domain of CD74 (CD74–ICD) may be cleaved by the SPPL2A protease and then activate the NF-kB-dependent inflammation pathway in IAM, resulting in the production of CCL5, which recruits peripheral T cells into the retina and causes an inflammatory burst in autoimmune uveitis mice. Decreasing the level of CD74 or CCL5 could effectively reduce uveitogenic T cell infiltration and relieve the autoimmune response in EAU mouse models, indicating the potential therapeutic value of CD74 and CCL5 in autoimmune uveitis.

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