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Emerging roles of obstruction and mutations in renal malformations
1Nephrourology Unit, Institute of Child Health, University College London Medical School, UK.
Abstract:
In this short review I will highlight some of the "molecular lesions" that occur in patients with malformations of the urinary tract in terms of: (1) aberrant gene expression in dysplastic and obstructed kidneys and (2) the effects of mutations and genetic polymorphisms on renal growth and response to injury. It is suggested that the prenatal obstruction of urinary flow transduces a signal which elicits a proliferative response in existing metanephric epithelia, with a concomitant block in new nephron formation and apoptosis of precursor cells. Understanding these processes may lead to the therapeutic modulation of disease. Secondly, I will review possible genetic influences in the generation of isolated (non-syndromic) renal malformations. In this respect, primary vesicoureteric reflux represents numerically the most important disorder, and the discovery of disease loci should facilitate early diagnosis and identification of asymptomatic carriers. It is possible that the apparent variable penetrance and expression of some familial renal malformations are the result of the action of modifying genes which act during kidney development or even after the nephrogenic period.
Insights
This review explores molecular lesions in congenital urinary tract malformations, focusing on aberrant gene expression and genetic factors influencing kidney development and injury response.
Area of Science:
- Nephrology
- Developmental Biology
- Genetics
Background:
- Congenital anomalies of the kidney and urinary tract (CAKUT) are a significant cause of renal disease.
- Understanding the molecular basis of CAKUT is crucial for diagnosis and treatment.
Purpose of the Study:
- To review molecular lesions in CAKUT, including aberrant gene expression and genetic influences.
- To discuss the impact of prenatal urinary obstruction on kidney development.
- To explore genetic factors in isolated renal malformations like vesicoureteric reflux.
Main Methods:
- Review of existing literature on molecular mechanisms in CAKUT.
- Analysis of gene expression patterns in dysplastic and obstructed kidneys.
- Examination of genetic mutations and polymorphisms affecting renal development and injury.
Main Results:
- Prenatal urinary obstruction triggers aberrant epithelial proliferation and blocks nephrogenesis.
- Genetic factors, including mutations and polymorphisms, play a role in renal malformations.
- Primary vesicoureteric reflux is a key disorder influenced by genetic loci.
Conclusions:
- Understanding molecular lesions in CAKUT can lead to therapeutic interventions.
- Genetic discoveries aid in early diagnosis and carrier identification for CAKUT.
- Modifying genes may explain variable expression and penetrance in familial renal malformations.