Differences in renal cortex transcriptional profiling of wild-type and novel type B cystinuria model rats

Cystinuria is a genetic disorder of cystine transport that accounts for 1–2% of all cases of renal lithiasis. It is characterized by hyperexcretion of cystine in urine and recurrent cystine lithiasis. Defective transport of cystine into epithelial cells of renal tubules occurs because of mutations o...

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Veröffentlicht in:Urolithiasis 2022-06, Vol.50 (3), p.279-291
Hauptverfasser: Zhang, Zihan, Zheng, Rui, Chen, Zhoutong, Zhan, Xia, Fang, Xiaoliang, Liu, Meizhen, Li, Yongmei, Xu, Yonghu, Li, Dali, Geng, Hongquan, Zhang, Xiaohui, Xu, Guofeng
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container_start_page 279
container_title Urolithiasis
container_volume 50
creator Zhang, Zihan
Zheng, Rui
Chen, Zhoutong
Zhan, Xia
Fang, Xiaoliang
Liu, Meizhen
Li, Yongmei
Xu, Yonghu
Li, Dali
Geng, Hongquan
Zhang, Xiaohui
Xu, Guofeng
description Cystinuria is a genetic disorder of cystine transport that accounts for 1–2% of all cases of renal lithiasis. It is characterized by hyperexcretion of cystine in urine and recurrent cystine lithiasis. Defective transport of cystine into epithelial cells of renal tubules occurs because of mutations of the transport heterodimer, including protein b 0,+ AT (encoded by SLC7A9) and rBAT (encoded by SLC3A1) linked through a covalent disulfide bond. Study generated a novel type B cystinuria rat model by artificially deleting 7 bp of Slc7a9 gene exon 3 using the CRISPR-Cas9 system, and those Slc7a9 -deficient rats were proved to be similar with cystinuria in terms of genome, transcriptome, translation, and biologic phenotypes with no off-target editing. Subsequent comparisons of renal histopathology indicated model rats gained typical secondary changes as medullary fibrosis with no stone formation. A total of 689 DEGs (383 upregulated and 306 downregulated) were differentially expressed in the renal cortex of cystinuria rats. In accordance with the functional annotation of DEGs, the potential role of glutathione metabolism processes in the kidney of cystinuria rat model was proposed, and KEGG analysis results showed that knock-out of Slc7a9 gene triggered more biological changes which has not been studied. In short, for the first time, a rat model and its transcriptional database that mimics the pathogenesis and clinical consequences of human type B cystinuria were generated.
doi_str_mv 10.1007/s00240-022-01321-6
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It is characterized by hyperexcretion of cystine in urine and recurrent cystine lithiasis. Defective transport of cystine into epithelial cells of renal tubules occurs because of mutations of the transport heterodimer, including protein b 0,+ AT (encoded by SLC7A9) and rBAT (encoded by SLC3A1) linked through a covalent disulfide bond. Study generated a novel type B cystinuria rat model by artificially deleting 7 bp of Slc7a9 gene exon 3 using the CRISPR-Cas9 system, and those Slc7a9 -deficient rats were proved to be similar with cystinuria in terms of genome, transcriptome, translation, and biologic phenotypes with no off-target editing. Subsequent comparisons of renal histopathology indicated model rats gained typical secondary changes as medullary fibrosis with no stone formation. A total of 689 DEGs (383 upregulated and 306 downregulated) were differentially expressed in the renal cortex of cystinuria rats. In accordance with the functional annotation of DEGs, the potential role of glutathione metabolism processes in the kidney of cystinuria rat model was proposed, and KEGG analysis results showed that knock-out of Slc7a9 gene triggered more biological changes which has not been studied. 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It is characterized by hyperexcretion of cystine in urine and recurrent cystine lithiasis. Defective transport of cystine into epithelial cells of renal tubules occurs because of mutations of the transport heterodimer, including protein b 0,+ AT (encoded by SLC7A9) and rBAT (encoded by SLC3A1) linked through a covalent disulfide bond. Study generated a novel type B cystinuria rat model by artificially deleting 7 bp of Slc7a9 gene exon 3 using the CRISPR-Cas9 system, and those Slc7a9 -deficient rats were proved to be similar with cystinuria in terms of genome, transcriptome, translation, and biologic phenotypes with no off-target editing. Subsequent comparisons of renal histopathology indicated model rats gained typical secondary changes as medullary fibrosis with no stone formation. A total of 689 DEGs (383 upregulated and 306 downregulated) were differentially expressed in the renal cortex of cystinuria rats. In accordance with the functional annotation of DEGs, the potential role of glutathione metabolism processes in the kidney of cystinuria rat model was proposed, and KEGG analysis results showed that knock-out of Slc7a9 gene triggered more biological changes which has not been studied. In short, for the first time, a rat model and its transcriptional database that mimics the pathogenesis and clinical consequences of human type B cystinuria were generated.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>35416493</pmid><doi>10.1007/s00240-022-01321-6</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0002-5104-5386</orcidid><oa>free_for_read</oa></addata></record>
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subjects Amino Acid Transport Systems, Basic - genetics
Amino Acid Transport Systems, Basic - metabolism
Animals
Chemical bonds
CRISPR
Cystine - metabolism
Cystinuria - genetics
Cystinuria - metabolism
Embryos
Female
Hospitals
Humans
Laboratories
Lithiasis - complications
Male
Medical Biochemistry
Medicine
Medicine & Public Health
Metabolism
Mutation
Nephrology
Original
Original Article
Pediatrics
Proteins
Rats
Rodents
Urinary tract diseases
Urine
Urology
title Differences in renal cortex transcriptional profiling of wild-type and novel type B cystinuria model rats
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