Abstract
Unilateral ureteral obstruction is a popular experimental model of renal injury. However, the study of the kidney response to urinary tract obstruction is only one of several advantages of this model. Unilateral ureteral obstruction causes subacute renal injury characterized by tubular cell injury, interstitial inflammation and fibrosis. For this reason, it serves as a model both of irreversible acute kidney injury and of events taking place during human chronic kidney disease. Being a unilateral disease, it is not useful to study changes in global kidney function, but has the advantage of a low mortality and the availability of an internal control (the non-obstructed kidney). Experimental unilateral ureteral obstruction has illustrated the molecular mechanisms of apoptosis, inflammation and fibrosis, all three key processes in kidney injury of any cause, thus providing information beyond obstruction. Recently this model has supported key concepts on the role in kidney fibrosis of epithelial–mesenchymal transition, tubular epithelial cell G2/M arrest, the anti-aging hormone Klotho and renal innervation. We now review the experimental model and its contribution to identifying novel therapeutic targets in kidney injury and fibrosis, independently of the noxa.
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Abbreviations
- α-SMA:
-
Alpha-smooth muscle actin
- ACE:
-
Angiotensin-converting enzyme
- AKI:
-
Acute kidney injury
- Alk3:
-
Activin-like kinase-3
- AngII:
-
Angiotensin II
- ARB:
-
Angiotensin receptor blocker
- B1R:
-
Kinin B1 receptor
- BMP-7:
-
Bone morphogenetic protein-7
- CGRP:
-
Calcitonin gene-related peptide
- CKD:
-
Chronic kidney disease
- ECM:
-
Extracellular matrix
- EGFR:
-
Epithelial growth factor
- EMT:
-
Epithelial to mesenchymal transition
- HE4:
-
Human epididymis protein 4
- H/E:
-
Hematoxilyn/eosin staining
- HIPK2:
-
Homeo-domain-interacting protein kinase 2
- ICAM-1:
-
Intercelullar adhesion molecule-1
- MAPK:
-
Mitogen-acivated protein kinase
- MCP-1:
-
Macrophages chemoattractant protein-1
- NMDA:
-
N-methyl-d-aspartate
- NMDAR:
-
N-methyl-d-aspartate receptor
- OPN:
-
Osteopontin
- PAI-1:
-
Plasminogen activator inhibitor-1
- PPARα:
-
Peroxisome proliferator-activated receptor alpha
- RIPK1:
-
Receptor-interacting serine/threonine protein kinase 1
- RIPK2:
-
Receptor-interacting serine/threonine protein kinase 2
- TGF-β1:
-
Transforming growth factor-beta 1
- TNFR1:
-
Tumor necrosis factor receptor-1
- TNFR2:
-
Tumor necrosis factor receptor-2
- TNFα:
-
Tumor necrosis factor-alpha
- TMS:
-
Trichrome Masson’s staining
- TWEAK:
-
TNF-like weak inducer of apoptosis
- UUO:
-
Unilateral ureteral obstruction
- VCAM-1:
-
Vascular cell adhesion molecule-1
- VDR:
-
Vitamin D receptor
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Acknowledgments
The study was supported by the following: grant support: FIS 081564, PS09/00447, PI07/0020, CP08/1083, ISCIII-RETIC, REDinREN/RD06/0003, REDin-REN/RD06/0004, FEDER funds, RD12/0021, Comunidad de Madrid/CIFRA S2010/BMD-2378; salary support: FIS to ABM, MDSN, ABS, MCI; FIS and IIS-FJD to AMR; Fundación Conchita Rábago to ACU and SB; Programa Intensificación Actividad Investigadora (ISCIII/Agencia Laín-Entralgo/CM) to AO.
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Ucero, A.C., Benito-Martin, A., Izquierdo, M.C. et al. Unilateral ureteral obstruction: beyond obstruction. Int Urol Nephrol 46, 765–776 (2014). https://doi.org/10.1007/s11255-013-0520-1
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DOI: https://doi.org/10.1007/s11255-013-0520-1