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Li Y, Chen Z, Zhang J, Zhang Q, He L, Xu M, Xu G, Geng H, Fang X. Quantitative Proteome of Infant Stenotic Ureters Reveals Extracellular Matrix Organization and Oxidative Stress Dysregulation Underlying Ureteropelvic Junction Obstruction. Proteomics Clin Appl 2020; 14:e2000030. [PMID: 32969194 DOI: 10.1002/prca.202000030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 08/21/2020] [Indexed: 11/09/2022]
Abstract
PURPOSE Ureteropelvic junction obstruction (UPJO) is the most frequent cause of congenital hydronephrosis in child. To better investigate the molecular mechanisms of this pathological process, the stenotic ureter proteome of UPJO in infants is compared with their own normal pre-stenotic segments. EXPERIMENTAL DESIGN Data independent acquisition-based proteomics are performed to compare proteome between pre-stenotic and stenotic ureter from nine UPJO infants. Gene ontology analysis, hierarchical cluster analysis, and network interaction are performed to characterize biological functions of significantly altered proteins. Selected significantly altered proteins are validated by western blot on another three UPJO infants. RESULTS 15 proteins are up-regulated and 33 proteins are down-regulated during stenotic pathology. Significantly altered proteins are involved in decreased extracellular matrix and cytoskeleton organization, increased regulation of oxidative activity, and altered inflammatory associated exocytosis. Significant expression of biglycan, fibulin-1, myosin-10, cytochrome b5 are validated providing possible mechanism in UPJO which could be associated impaired smooth muscle cell, epithelial integrity, and increased oxidative stress. CONCLUSIONS AND CLINICAL RELEVANCE: This study provides molecular evidence of dysregulated extracellular matrix organization, impaired smooth muscle cell, and oxidative stress during UPJO pathology, indicating that biglycan, fibulin-1, myosin-10, cytochrome b5 might reflect the pathology of UPJO.
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Affiliation(s)
- Yueyan Li
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Zhoutong Chen
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Junqi Zhang
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Qimin Zhang
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Lei He
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Maosheng Xu
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Guofeng Xu
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Hongquan Geng
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Xiaoliang Fang
- Department of Pediatric Urology, Xin hua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
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Changes in cell fate determine the regenerative and functional capacity of the developing kidney before and after release of obstruction. Clin Sci (Lond) 2018; 132:2519-2545. [PMID: 30442812 DOI: 10.1042/cs20180623] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/23/2018] [Accepted: 11/14/2018] [Indexed: 12/14/2022]
Abstract
Congenital obstructive nephropathy is a major cause of chronic kidney disease (CKD) in children. The contribution of changes in the identity of renal cells to the pathology of obstructive nephropathy is poorly understood. Using a partial unilateral ureteral obstruction (pUUO) model in genetically modified neonatal mice, we traced the fate of cells derived from the renal stroma, cap mesenchyme, ureteric bud (UB) epithelium, and podocytes using Foxd1Cre, Six2Cre, HoxB7Cre, and Podocyte.Cre mice respectively, crossed with double fluorescent reporter (membrane-targetted tandem dimer Tomato (mT)/membrane-targetted GFP (mG)) mice. Persistent obstruction leads to a significant loss of tubular epithelium, rarefaction of the renal vasculature, and decreased renal blood flow (RBF). In addition, Forkhead Box D1 (Foxd1)-derived pericytes significantly expanded in the interstitial space, acquiring a myofibroblast phenotype. Degeneration of Sine Oculis Homeobox Homolog 2 (Six2) and HoxB7-derived cells resulted in significant loss of glomeruli, nephron tubules, and collecting ducts. Surgical release of obstruction resulted in striking regeneration of tubules, arterioles, interstitium accompanied by an increase in blood flow to the level of sham animals. Contralateral kidneys with remarkable compensatory response to kidney injury showed an increase in density of arteriolar branches. Deciphering the mechanisms involved in kidney repair and regeneration post relief of obstruction has potential therapeutic implications for infants and children and the growing number of adults suffering from CKD.
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Pons M, Leporq B, Ali L, Alison M, Albuquerque M, Peuchmaur M, Poli Mérol ML, Blank U, Lambert SA, El Ghoneimi A. Renal parenchyma impairment characterization in partial unilateral ureteral obstruction in mice with intravoxel incoherent motion-MRI. NMR IN BIOMEDICINE 2018; 31:e3858. [PMID: 29178439 DOI: 10.1002/nbm.3858] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 08/19/2017] [Accepted: 10/11/2017] [Indexed: 06/07/2023]
Abstract
Ureteropelvic junction obstruction constitutes a major cause of progressive pediatric renal disease. The biological mechanisms underlying the renal response to obstruction can be investigated using a clinically relevant mouse model of partial unilateral ureteral obstruction (pUUO). Renal function and kidney morphology data can be evaluated using renal ultrasound, scintigraphy and uro-magnetic resonance imaging (uro-MRI), but these methods are poorly linked to histological change and not all are quantitative. Here, we propose to investigate pUUO for the first time using an intravoxel incoherent motion diffusion sequence. The aim of this study was to quantitatively characterize impairment of the kidney parenchyma in the pUUO model. This quantitative MRI method was able to assess the perfusion and microstructure of the kidney without requiring the injection of a contrast agent. The results suggest that a perfusion fraction (f) reduction is associated with a decrease in the volume of the renal parenchyma, which could be related to decreased renal vascularization. The latter may occur before impairment by fibrosis and the findings are in accordance with the literature using the UUO mice model and, more specifically, on pUUO. Further investigation is required before this technique can be made available for the diagnosis and management of children with antenatal hydronephrosis and to select the optimal timing of surgery if required.
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Affiliation(s)
- Maguelonne Pons
- INSERM UMR 1149, Paris, France
- CNRS ERL8252, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Benjamin Leporq
- INSERM UMR 1149, Paris, France
- CNRS ERL8252, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
- Université Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, U1206, Lyon, France
| | - Liza Ali
- INSERM UMR 1149, Paris, France
- CNRS ERL8252, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
- Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Marianne Alison
- Department of Pediatric Radiology, Hôpital Robert Debré, APHP, Université Paris Diderot, PRES Sorbonne Paris-Cité, INSERM U1141, DHU PROTECT, Paris, France
| | | | - Michel Peuchmaur
- Department of Pathology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | | | - Ulrich Blank
- INSERM UMR 1149, Paris, France
- CNRS ERL8252, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Simon A Lambert
- INSERM UMR 1149, Paris, France
- CNRS ERL8252, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
- Université Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, U1206, Lyon, France
| | - Alaa El Ghoneimi
- INSERM UMR 1149, Paris, France
- CNRS ERL8252, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
- Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
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Pons M, Ali L, Beghdadi W, Danelli L, Alison M, Madjène LC, Calvo J, Claver J, Vibhushan S, Åbrink M, Pejler G, Poli-Mérol ML, Peuchmaur M, El Ghoneimi A, Blank U. Mast Cells and MCPT4 Chymase Promote Renal Impairment after Partial Ureteral Obstruction. Front Immunol 2017; 8:450. [PMID: 28523000 PMCID: PMC5415561 DOI: 10.3389/fimmu.2017.00450] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 03/31/2017] [Indexed: 11/29/2022] Open
Abstract
Obstructive nephropathy constitutes a major cause of pediatric renal progressive disease. The mechanisms leading to disease progression are still poorly understood. Kidney fibrotic lesions are reproduced using a model of partial unilateral ureteral obstruction (pUUO) in newborn mice. Based on data showing significant mast cell (MC) infiltration in patients, we investigated the role of MC and murine MCPT4, a MC-released chymase, in pUUO using MC- (Wsh/sh), MCPT4-deficient (Mcpt4−/−), and wild-type (WT) mice. Measurement of kidney length and volume by magnetic resonance imaging (MRI) as well as postmortem kidney weight revealed hypotrophy of operated right kidneys (RKs) and compensatory hypertrophy of left kidneys. Differences between kidneys were major for WT, minimal for Wsh/sh, and intermediate for Mcpt4−/− mice. Fibrosis development was focal and increased only in WT-obstructed kidneys. No differences were noticed for local inflammatory responses, but serum CCL2 was significantly higher in WT versus Mcpt4−/− and Wsh/sh mice. Alpha-smooth muscle actin (αSMA) expression, a marker of epithelial–mesenchymal transition (EMT), was high in WT, minimal for Wsh/sh, and intermediate for Mcpt4−/− RK. Supernatants of activated MC induced αSMA in co-culture experiments with proximal tubular epithelial cells. Our results support a role of MC in EMT and parenchyma lesions after pUUO involving, at least partly, MCPT4 chymase. They confirm the importance of morphologic impairment evaluation by MRI in pUUO.
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Affiliation(s)
- Maguelonne Pons
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France.,Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Liza Ali
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France.,Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Walid Beghdadi
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Luca Danelli
- CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Marianne Alison
- Department of Pediatric Radiology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Lydia Celia Madjène
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Jessica Calvo
- Department of Pathology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Julien Claver
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Shamila Vibhushan
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Magnus Åbrink
- Section of Immunology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Gunnar Pejler
- Uppsala University, Department of Medical Biochemistry and Microbiology, Uppsala, Sweden.,Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry, Uppsala, Sweden
| | - Marie-Laurence Poli-Mérol
- Pediatric Surgery Unit, American Memorial Hospital, Université Reims Champagne Ardennes, Reims, France
| | - Michel Peuchmaur
- Department of Pathology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Alaa El Ghoneimi
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France.,Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Ulrich Blank
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
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Nagy II, Xu Q, Naillat F, Ali N, Miinalainen I, Samoylenko A, Vainio SJ. Impairment of Wnt11 function leads to kidney tubular abnormalities and secondary glomerular cystogenesis. BMC DEVELOPMENTAL BIOLOGY 2016; 16:30. [PMID: 27582005 PMCID: PMC5007805 DOI: 10.1186/s12861-016-0131-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 08/22/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND Wnt11 is a member of the Wnt family of secreted signals controlling the early steps in ureteric bud (UB) branching. Due to the reported lethality of Wnt11 knockout embryos in utero, its role in later mammalian kidney organogenesis remains open. The presence of Wnt11 in the emerging tubular system suggests that it may have certain roles later in the development of the epithelial ductal system. RESULTS The Wnt11 knockout allele was backcrossed with the C57Bl6 strain for several generations to address possible differences in penetrance of the kidney phenotypes. Strikingly, around one third of the null mice with this inbred background survived to the postnatal stages. Many of them also reached adulthood, but urine and plasma analyses pointed out to compromised kidney function. Consistent with these data the tubules of the C57Bl6 Wnt11 (-/-) mice appeared to be enlarged, and the optical projection tomography indicated changes in tubular convolution. Moreover, the C57Bl6 Wnt11 (-/-) mice developed secondary glomerular cysts not observed in the controls. The failure of Wnt11 signaling reduced the expression of several genes implicated in kidney development, such as Wnt9b, Six2, Foxd1 and Hox10. Also Dvl2, an important PCP pathway component, was downregulated by more than 90 % due to Wnt11 deficiency in both the E16.5 and NB kidneys. Since all these genes take part in the control of UB, nephron and stromal progenitor cell differentiation, their disrupted expression may contribute to the observed anomalies in the kidney tubular system caused by Wnt11 deficiency. CONCLUSIONS The Wnt11 signal has roles at the later stages of kidney development, namely in coordinating the development of the tubular system. The C57Bl6 Wnt11 (-/-) mouse generated here provides a model for studying the mechanisms behind tubular anomalies and glomerular cyst formation.
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Affiliation(s)
- Irina I Nagy
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland.,NordLab Oulu, Department of Clinical Chemistry, University of Oulu, Oulu, Finland
| | - Qi Xu
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland
| | - Florence Naillat
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland
| | - Nsrein Ali
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland
| | - Ilkka Miinalainen
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland
| | - Anatoly Samoylenko
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland
| | - Seppo J Vainio
- Biocenter Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell Matrix Research, University of Oulu, Aapistie 5A, Oulu, 90014, Finland. .,InfoTech Oulu, University of Oulu, Oulu, Finland.
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Zeidan S, El Ghoneimi A, Peuchmaur M, Bingen E, Bonacorsi S. Effect of partial ureteral obstruction and bacterial virulence on the occurrence of renal scarring in a mouse model. Urology 2012; 80:486.e1-7. [PMID: 22516355 DOI: 10.1016/j.urology.2012.02.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 01/13/2012] [Accepted: 02/13/2012] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To evaluate the effect of the infection and the obstruction of urinary tract on renal parenchyma, we developed a model of ascending urinary infection in mice with partial unilateral obstructive uropathy. METHODS Six week-old CBA/J mice were operated on to perform a right partial ureteral obstruction and challenged transurethrally with Escherichia coli CFT073 (high virulent strain) or E. coli Mez (low virulent strain). Level of infection of urine and kidneys, score of inflammation and fibrosis of kidneys, and kidney weight ratio (KWR) in the short and long term were studied. RESULTS At short-term (72 hours) experimentation, partial ureteral obstruction does not influence the level of kidney infection in terms of bacterial count, and the score of inflammation regardless of whether a virulent or low virulent strain was used. At long-term (42 days) experimentation, E. coli Mez was eliminated from all mice kidneys, but CFT073 persisted in almost all; obstruction did not influence the level of kidney infection with CFT073 but a significant difference of KWR and the inflammation and fibrosis score between obstructed and unobstructed kidneys was found (P = .0078; P = .036, respectively). Although the E. coli Mez strain did not persist in renal parenchyma, severe damage of the renal parenchyma was observed. CONCLUSION The proposed model is similar to the obstructive uropathy in children in which ureteral obstruction is present before the onset of infection. The association of obstruction and urinary infection impairs kidney growth and favors the occurrence of renal damage.
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Affiliation(s)
- Smart Zeidan
- Department of Pediatric Surgery and Urology, AP-HP, Robert Debré University Hospital, University of Paris Diderot, Paris, France.
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Klein J, Gonzalez J, Miravete M, Caubet C, Chaaya R, Decramer S, Bandin F, Bascands JL, Buffin-Meyer B, Schanstra JP. Congenital ureteropelvic junction obstruction: human disease and animal models. Int J Exp Pathol 2011; 92:168-92. [PMID: 20681980 PMCID: PMC3101490 DOI: 10.1111/j.1365-2613.2010.00727.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Accepted: 06/03/2010] [Indexed: 02/06/2023] Open
Abstract
Ureteropelvic junction (UPJ) obstruction is the most frequently observed cause of obstructive nephropathy in children. Neonatal and foetal animal models have been developed that mimic closely what is observed in human disease. The purpose of this review is to discuss how obstructive nephropathy alters kidney histology and function and describe the molecular mechanisms involved in the progression of the lesions, including inflammation, proliferation/apoptosis, renin-angiotensin system activation and fibrosis, based on both human and animal data. Also we propose that during obstructive nephropathy, hydrodynamic modifications are early inducers of the tubular lesions, which are potentially at the origin of the pathology. Finally, an important observation in animal models is that relief of obstruction during kidney development has important effects on renal function later in adult life. A major short-coming is the absence of data on the impact of UPJ obstruction on long-term adult renal function to elucidate whether these animal data are also valid in humans.
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Affiliation(s)
- Julie Klein
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Julien Gonzalez
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Mathieu Miravete
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Cécile Caubet
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Rana Chaaya
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Stéphane Decramer
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
- Department of Pediatric Nephrology, Hôpital des Enfants, Centre de Référence du Sud Ouest des Maladies Rénales RaresToulouse, France
| | - Flavio Bandin
- Department of Pediatric Nephrology, Hôpital des Enfants, Centre de Référence du Sud Ouest des Maladies Rénales RaresToulouse, France
| | - Jean-Loup Bascands
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Bénédicte Buffin-Meyer
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
| | - Joost P Schanstra
- Institut National de la Santé et de la Recherche Médicale (INSERM)Toulouse, France
- Université Toulouse III Paul-Sabatier, Institut de Médecine Moléculaire de RangueilToulouse, France
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Renal parenchymal fibrosis and atrophy are not correlated with upper tract dilatation: long-term study of partial unilateral ureteral obstruction in neonatal mice. J Pediatr Urol 2011; 7:310-6. [PMID: 21527217 DOI: 10.1016/j.jpurol.2011.02.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE The mechanism underlying the evolution of congenital obstructive hydronephrosis is still unclear. In a previous study, we have shown that it is possible to create renal lesions in newborn mice specific to partial ureteral obstruction. We aimed to study the long-term results of such partial obstruction. METHODS Mice were operated on the third day of life. We created 2 groups: partial unilateral obstruction and control. We studied antero-posterior pelvis diameter, kidney length and volume on magnetic resonance imaging at day 10 and 3 months. We assessed ureteric patency by injecting Patent Blue dye. Kidney weight and fibrosis were histologically assessed. Fibrosis was assessed using Sirius Red staining and morphometry. RESULTS Imaging showed parenchymal atrophy in the partially obstructed kidney and compensatory hypertrophy of the contralateral kidney. Pelvis dilatation was detected at day 10 but remained stable without significant increase at 3 months. The patency test confirmed the absence of total obstruction in the long term. There was no correlation between the degree of dilatation and parenchymal atrophy or the contralateral hypertrophy. Pathological studies at 3 months revealed fibrosis in the parenchyma without significant correlation with pelvis dilatation. CONCLUSIONS Long-term results confirmed that partial ureteral obstruction in newborn mice produces fibrotic lesions of the renal parenchyma, which are not correlated with dilatation of the upper tract. These results could contribute to the clinical management of obstructive uropathy in children, emphasizing that follow up with simple evaluation of upper tract dilatation is insufficient to predict renal deterioration.
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