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Using transgenic mice to analyze the mechanisms of progression of chronic renal failure
F Terzi1, M Burtin, G Friedlander
1INSERM U426 and Department of Physiology, Xavier Bichat Medical School, Paris 7 University, Paris, France. terzi@cochin.inserm.fr
Abstract:
An understanding of the mechanisms underlying the formation of renal lesions is necessary for the development of strategies aiming to delay the progression of chronic renal failure. The generation of transgenic mice in the past 20 years has contributed significantly to the study of this phenomenon. Overexpression and/or inactivation of single factors in renal tissue demonstrated that molecules such as growth factors, proto-oncogenes, and renin-angiotensin system elements play major roles in renal deterioration. Several mouse models of renal injury have been developed in the past 10 yr. Transgenic mice that exhibit a normal phenotype under physiologic conditions allow analysis of the roles of single factors in the progression of chronic renal failure when renal injury models are used. Using this strategy, it was demonstrated that vascular adaptation, which is a process that involves the endothelin/nitric oxide balance, is essential for the survival of mice after nephron reduction and that the epidermal growth factor/activator protein-1/Bcl-2 pathway is involved in the development of renal lesions after renal injury, possibly via adjustment of the proliferation/apoptosis balance. Moreover, it was demonstrated that selective inhibition of epidermal growth factor signaling in the kidney successfully prevents the progression of chronic renal failure. These results indicate the power of transgenesis for elucidation of the pathogenesis of renal disease.
Insights
Transgenic mouse models reveal key mechanisms in chronic kidney disease progression. Targeting epidermal growth factor signaling in the kidney can prevent kidney failure, highlighting the power of transgenesis in understanding renal disease.
Area of Science:
- Nephrology
- Molecular Biology
- Genetics
Background:
- Understanding renal lesion formation is crucial for managing chronic kidney disease (CKD).
- Transgenic mouse models have become invaluable tools for studying CKD pathogenesis over the last two decades.
- Key molecular factors like growth factors and the renin-angiotensin system are implicated in renal deterioration.
Purpose of the Study:
- To elucidate the mechanisms underlying renal lesion formation and CKD progression using transgenic mouse models.
- To investigate the roles of specific molecular pathways in the development of kidney injury and failure.
- To assess the therapeutic potential of targeting specific signaling pathways, such as epidermal growth factor (EGF), in preventing CKD progression.
Main Methods:
- Generation and utilization of transgenic mice with specific genetic modifications.
- Development of various renal injury models in mice.
- Analysis of molecular pathways involved in vascular adaptation, proliferation, and apoptosis in response to renal injury.
- Assessment of the effects of selective inhibition of EGF signaling on CKD progression.
Main Results:
- Vascular adaptation, regulated by the endothelin/nitric oxide balance, is essential for survival after nephron reduction.
- The epidermal growth factor/activator protein-1/Bcl-2 pathway is involved in renal lesion development, potentially by modulating the proliferation/apoptosis balance.
- Selective inhibition of EGF signaling in the kidney effectively prevents the progression of chronic renal failure.
Conclusions:
- Transgenic mouse models are powerful tools for dissecting the pathogenesis of renal diseases.
- Specific molecular pathways, including EGF signaling, play critical roles in the development and progression of CKD.
- Targeting EGF signaling offers a promising therapeutic strategy for preventing the advancement of chronic renal failure.