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Lysosomal protein transmembrane 5 driving senescence in tubular epithelial cells accelerates chronic kidney disease progression.

ABSTRACT: Lysosomal protein transmembrane 5 driving senescence in tubular epithelial cells accelerates chronic kidney disease progression.

PROVIDER: PRJNA1070581 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27764717_1.fastq.gz	Fastqsanger.gz
	SRR27764717_2.fastq.gz	Fastqsanger.gz
	SRR27764718_1.fastq.gz	Fastqsanger.gz
	SRR27764718_2.fastq.gz	Fastqsanger.gz
	SRR27764719_1.fastq.gz	Fastqsanger.gz

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Lysosomal protein transmembrane 5 driving senescence in tubular epithelial cells accelerates chronic kidney disease progression.

Project description:Cellular senescence is associated with the progression of chronic kidney disease (CKD), and accelerated tubular cell senescence promotes the pathogenesis of renal fibrosis. We established three animal models related to Chronic Kidney Disease, including aristolochic acid nephropathy (AAN), bilateral ischemia/reperfusion injury (BIRI) and unilateral ureter obstruction (UUO). By RNA sequencing analysis in AAN, BIRI and UUO mice, we observed significant changes of senescence and fibrosis related genes.

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LCDR maintains the integrity of lysosomal membrane by hnRNP K-stabilized LAPTM5 transcript and promotes cell survival

Project description:Lysosome plays important roles in cellular homeostasis and its dysregulation is associated with cancer. However, the regulation and underlying mechanism of lysosome in cancer survival remain incompletely understood. Here, we reveal a role for a histone acetylation-regulated long non-coding RNA termed as lysosome cell death regulator (LCDR) in lung cancer cell survival, knockdown of which promotes apoptosis. Mechanistically, LCDR binds to heterogenous nuclear ribonucleoprotein K (hnRNP K) to regulate the stability of lysosomal-associated protein transmembrane 5 (LAPTM5) transcript that maintain integrity of lysosomal membrane. Consequently, knockdown of LCDR, hnRNP K or LAPTM5 promotes lysosomal membrane permeabilization and lysosomal cell death-mediated apoptosis. LAPTM5 overexpression or cathepsin B inhibitor partially restores the effects of this axis on lysosomal cell death. Clinically, LCDR/hnRNP K/LAPTM5 are upregulated in lung cancer tissues and coexpression of this axis shows the increased diagnostic value for lung cancer. These findings shed light on LCDR/hnRNP K/LAPTM5 as potential therapeutic targets and targeting lysosome is a promising strategy in cancer treatment.

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Complement induced aberrant epigenetic modifications in renal tubular epithelial cells and accelerates senescence after kidney transplantation by Wnt pathway

Project description:Epigenetic mechanisms as DNA methylation can affect allograft outcome after kidney transplantation, accelerating renal aging. Complement system is the major player of ischemia reperfusion (I/R) injury and Renal Proximal Tubular Cells (RPTEC) are known to express C5a receptor (C5aR). However, little is known about the downstream effect of C5a-C5aR interaction. We performed a whole-genome DNA methylation analysis on C5a stimulated RPTEC and found several regions regulating genes involved in cell cycle control, DNA damage checkpoints and WNT signaling. These most represented genes were BCL9, CYP1B1 and CDK6. We showed that C5a induced-aberrant gene methylation significantly influences the expression of these genes. Moreover, the stimulation of RTEC by C5a led to senescence by up-regulating SA-β Gal positivity and increasing p53 gene and p21 protein level. IL-6, MCP-1, CTGF gene levels increase indicated the tubular SASP (Senescence associated Secretory Phenotype) acquirement. In accordance, in a swine model of I/R injury, we found that the increase expression of WNT4/βcatenin expression correlated with the augment in SA-β Gal, p21, p16 and IL-6 positivity after 24h from reperfusion. The treatment with C1-INH, a complement inhibitor, efficiently antagonized SASP restoring SA-β Gal, p21, p16, IL-6 expression at basal level and abrogating the WNT4/βcatenin activation. Thus, C5a affects the DNA methylation of genes involved in tubular senescence leading to a persistent, low-grade, inflammatory state called inflammaging. Targeting epigenetic programs may offer novels strategies to protect tubular cells from aging and promote kidney repair and recovery.

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