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ABSTRACT: Gut microbiome of chronic kidney disease (CKD) and healthy dogs

PROVIDER: PRJNA944392 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23852362.fastq.gz	Fastqsanger.gz
	SRR23852363.fastq.gz	Fastqsanger.gz
	SRR23852364.fastq.gz	Fastqsanger.gz
	SRR23852365.fastq.gz	Fastqsanger.gz
	SRR23852366.fastq.gz	Fastqsanger.gz

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Project description:Gut microbiome of chronic kidney disease (CKD) and healthy dogs

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Strongyloides stercoralis infection reduces Fusicatenibacter and Anaerostipes in the gu t and increases bacterial amino-acid metabolism in early-stage chronic kidney disease

Project description:Understanding gut bacterial composition and proteome changes in patients with early-stage chronic kidney disease (CKD) could lead to better methods of controlling the disease progression. Here, we investigated the gut microbiome and microbial functions in patients with S. stercoralis infection (strongyloidiasis) and early-stage CKD.

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Strongyloides stercoralis infection reduces bacteria producing short-chain fatty acids and increases bacterial amino-acid biosynthesis in early CKD patients

Project description:Controlling the progression of chronic kidney disease (CKD) at an early stage is critical for reducing disease severity. A cross-sectional study of chronic kidney disease (CKD) patients at all stages with S. stercoralis infection found that helminth infection caused gut dysbiosis, which may be involved in CKD progression. Because of the variation of gut microbiome results with helminth infection, the cross-sectional study of 16S rRNA sequencing, therefore, is insufficient to draw valid conclusions and correct the effects of S. stercoralis on the early stages of CKD. Combination with other omics approach is warrant to be better understand the disease.

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Investigation of Resistant Starch effect on gut microbiome in 5/6 nephrectomy mouse model of Chronic Kidney Disease

Project description:Background. Resistant Starch (RS) improves CKD outcomes. In this report we study how RS modulates host-microbiome interactions in CKD by measuring changes in abundance of proteins and bacteria in the gut. In addition, we demonstrate RS-mediated reduction in CKD-induced kidney damage. Methods. Eight mice underwent 5/6 nephrectomy to induce CKD and 8 served as healthy controls. CKD and Healthy (H) groups were further split into those receiving RS (CKDRS, n=4; HRS, n=4) and those on normal diet (CKD, n=4, H, n=4). Kidney injury was evaluated by measuring BUN/creatinine and by most-mortem histopathological evaluation. Cecal contents were analyzed mass spectrometry-based metaproteomics. PEAKS Studio was used to identify peptides via de novo sequencing. A set of R/Bioconductor packages and in house written scripts was further used to infer bacteria present, to evaluate changes in proteins and bacterial abundances, and to perform statistical analysis and hierarchical clustering. Results. The 5/6 nephrectomy compromised kidney function as seen by an increase in creatinine and BUN. Representative photomicrographs of trichrome-stained kidney sections showed reduced tubulointerstitial injury in CKD mice fed HAM-RS2 diet comparing to CKD mice fed normal diet. Identified organisms and proteins point toward a higher population of butyrate-producing bacteria, and reduced abundance of mucin-degrading bacteria. Conclusion. Resistant starch slows the progression of chronic kidney disease. Gut barrier function through maintenance of the mucin barrier plays a role in RS-associated improvements in CKD phenotype. Resistant starch supplementation leads to the active bacterial proliferation and the reduction of harmful bacterial metabolites.

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Opisthorchis viverrini infection exacerbates kidney disease through gut dysbiosis and alteration of host proteome in nonalcoholic steatohepatitis hamsters

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Gut-Derived Metabolite Trimethylamine N-Oxide Promotes Inflammation and Fibrosis Following Ischemia/Reperfusion through CCR2-Mediated Macrophage Infiltration

Project description:Inflammation plays a crucial role in the development of acute kidney injury (AKI) and subsequent chronic kidney disease (CKD) following renal ischemia-reperfusion (IR). It has been demonstrated that metabolites from the gut microbiota can trigger inflammatory responses and modulate renal damage induced by IR. However, the exact driving factors and underlying mechanisms of this process remain unclear. Trimethylamine N-oxide (TMAO), a choline metabolite derived from the gut, has been observed to increase in AKI and CKD patients. Our study reveals that glycyrrhizic acid (GA) exacerbates IR-induced AKI and subsequent CKD through TMAO. To delve into the underlying mechanisms, we employed single-cell sequencing to construct a molecular map of kidney cells.

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Project description:Epidemiological studies indicate that adverse intrauterine and postnatal environment has a long-lasting role in chronic kidney disease (CKD) development. Epigenetic information can represent a plausible carrier for mediating this programming effect. Here we demonstrate that genome-wide cytosine methylation patterns of healthy and CKD tubule samples obtained from patients show significant differences. Cytosine methylation changes showed high concordance (98%) with a large (n=87) replication dataset. We rarely observed differentially methylated regions (DMR) on promoters. Histone modification-based kidney specific genome-wide gene regulatory region annotation maps (promoters, enhancers, transcribed and repressed regions) were generated. DMRs mostly overlapped with putative enhancer regions and were enriched in consensus binding sequences for important renal transcription factors, indicating their importance in gene expression regulation. A core set of genes, including transforming growth factors and collagens, showed cytosine methylation changes correlating with downstream transcript levels. Our report raises the possibility that epigenetic dysregulation plays a role in CKD development via influencing core profibrotic pathways. We used microarrays to detail the differences of gene expression of human tubule epithelial cells between chronic kidney disease and normal. We sought to decrease the cell type heterogeneity of kidney tissues to increase the resolution of expression profiles. To that end, microdissected human kidney tissue from both chronic kidney disease patient and normal are used for RNA extraction and hybridization on Affymetrix microarrays.

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