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Mus musculus strain:MRL/lpr

ABSTRACT: RNA-sequencing analysis of plasmacytoid dendritic cells isolated from lupus mice

PROVIDER: PRJNA284002 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2060270.fastq.gz	Fastqsanger.gz
	SRR2060270_1.fastq.gz	Fastqsanger.gz
	SRR2060270_2.fastq.gz	Fastqsanger.gz
	SRR2060261.fastq.gz	Fastqsanger.gz
	SRR2060261_1.fastq.gz	Fastqsanger.gz

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RNA Sequencing Facilitates Quantitative Analysis of Lupus (MRL/lpr) and Control（MRL/mpj）Mouse Microglia Tanscriptomes

Project description:Up to 75% of systematic lupus erythematosus (SLE) patients experience neuropsychiatric (NP) symptoms, called neuropsychiatric SLE (NPSLE), yet the underlying mechanisms remain elusive. Microglia control synaptic pruning during early postnatal brain development. The process in NPSLE remains unclear. Here, we show that microglia-coordinated elimination of synaptic terminals participated in NPSLE in MRL/lpr mice, a lupus-prone murine model. We elucidated that lupus mice developed increased depression- and anxiety-like behaviors and persistent phagocytic microglia reactivation before overt peripheral lupus pathology. Microglial engulfment of synapses explained behavioral disorders. To elucidate the mechanism of synaptic pruning by microglia, we sequenced the gene expression in sorted microglia from both lupus (MRL/lpr) mice and the wild-type (MRL/mpj) controls.

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RNA Sequencing Facilitates Quantitative Analysis of Wild Type(MRL-mpj) and MRL-lpr (PBS or MSC treated) Hippocampoal Transcriptomes

Project description:Up to 75% of systematic lupus erythematosus (SLE) patients experience neuropsychiatric (NP) symptoms, called neuropsychiatric SLE (NPSLE), yet the underlying mechanisms remain elusive. Complement cascades mediate synaptic pruning by microglia during early postnatal brain development. The process in NPSLE remains unclear. Here, we show that complement-coordinated elimination of synaptic terminals participated in NPSLE in MRL/lpr mice, a lupus-prone murine model. We elucidated that lupus mice developed increased anxiety-like behaviors and persistent phagocytic microglia reactivation before overt peripheral lupus pathology. Microglial engulfment of synapses explained behavioral disorders. We further determined that neuronal Nr4a1 signaling was essential for attracting C1q synaptic deposition then apposition of phagocytic microglia, ensuing synaptic loss and neurological disease. Minocycline-deactivated microglia, antibody-blocked C1q, or neuronal Nr4a1 restore protected lupus mice from synapse loss and NP manifestations. Our findings revealed an active role of neurons in coordinating microglia-mediated synaptic loss and highlight neuronal Nr4a1 and C1q as critical components amenable to pharmacological intervention.

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miRNAs expression in the splenic CD4+ T cells and B cells isolated from MRL/lpr mice at 5 and 16 weeks of age

Project description:To identify any differentially expressed miRNAs in the CD4+ T cells of lupus. MicroRNAs (miRNAs) have been implicated as fine-tuning regulators controlling diverse biological processes at the level of posttranscriptional repression. Dysregulation of miRNAs has been described in various disease states, including human lupus. By using high-throughput microRNA profiling analysis, we identified that two miRNAs (miR-21 and miR-148a) overexpressed in CD4+ T cells from both lupus patients and lupus-prone MRL/lpr mice,which promote cell hypomethylation by repressing DNA methyltransferase 1 (DNMT1) expression. We isolated the splenic CD4+ T cells and B cells from MRL/lpr mice at 5 and 16 weeks of age.Cells were collected and total RNA was extracted for the TaqMan® Low Density Assay v2.0 Normalization was performed with snoRNA202, reference snRNAs for mouse.Comparative real-time PCR was performed in triplicate, including no-template.controls. Relative expression was calculated with the comparative cycle threshold method.

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