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RNAseq analysis of glomerular transcriptome of wild-type vs. Podocyte Cosmc knockout

ABSTRACT: RNAseq analysis of glomerular transcriptome of wild-type vs. Podocyte Cosmc knockout

PROVIDER: PRJNA521340 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8545240_1.fastq.gz	Fastqsanger.gz
	SRR8545240_2.fastq.gz	Fastqsanger.gz
	SRR8545241_1.fastq.gz	Fastqsanger.gz
	SRR8545241_2.fastq.gz	Fastqsanger.gz
	SRR8545242_1.fastq.gz	Fastqsanger.gz

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RNAseq analysis of glomerular transcriptome of wild-type vs. Podocyte Cosmc knockout

Project description:Cosmc is an obligate chaperone for C1GalT1 T transferase necessary for generating mature mucin-type O-glycans. Animals lacking Cosmc in glomerular podocytes develop proteinuria, glomerulosclerosis and progressive renal failure. This study was designed to examine transcriptome differences in 1 month male animals with and without podocyte Cosmc, a time point when proteinuria is established but glomerular architecture is still relatively intact.

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Project description:The progression of proteinuric kidney disease is associated with podocyte loss but the mechanisms remain unclear. Podocytes reenter the cell cycle to repair damaged ds DNA breaks. However, unsuccessful repair results in podocytes crossing the G1/S checkpoint and undergoes abortive cytokinesis. In this study, we identified Pfn1 as a major contributor in maintaining glomerular integrity and its loss in mice results in severe proteinuria, and kidney failure due to podocyte mitotic catastrophe, characterized by abundant multinucleated cells. Reentry of podocytes were identified by using FUCCI-2aR mice, accompanying the alteration of cell-cycle associated proteins, such as P21, P53, Cyclin B, and Cyclin D. Podocyte-specific translating ribosome affinity purification (TRAP) and RNAseq revealed a reduction of Ribosomal RNA-processing protein 8 (Rrp8) and re-expression of Rrp8 partially rescued the in-vitro phenotype. Clinical analysis of patients with proteinuric kidney disease demonstrated multinucleated podocytes and reduced podocyte profilin1 in kidney tissue. These results suggest that profilin is indispensible in regulating podocyte cell cycle and its disruption contributes to podocyte loss through mitotic catastrophe.

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Project description:Available single-cell RNA-seq analyses have revealed that individual cells of the same type differ substantially in gene expression. We wonder whether glomerular podocytes, the cell type that is part of glomerular filtration, also exhibit big difference in gene expression among individual cells; and what biological information could be obtained from the single-podocyte RNA-seq data. Therefore, we isolated mouse glomeruli by Dynabead/magnetic concentration method, and digested them with enzymes to dissociate the cells. We loaded the single cell suspension to a Fluidigm C1 Single-Cell Auto Prep System for single cell cDNA preparation. The cDNA samples were amplified and underwent sequecing using Illumina Highseq 2000 system.

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