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Use of Ultra-high Field MRI in Small Rodent Models of Polycystic Kidney Disease for In Vivo Phenotyping and Drug Monitoring
Published on: June 23, 2015
Understanding pathogenic mechanisms in polycystic kidney disease provides clues for therapy
Peter C Harris1, Vicente E Torres
1Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. harris.peter@mayo.edu
Purpose Of Review:
Polycystic kidney diseases are a group of inherited disorders that result in tubular dilatation and/or the development of fluid-filled cysts in the kidney. Identification and analysis of the primary defective protein in many of these diseases are providing insights into a common pathogenesis to polycystic kidney disease. This review explores this pathogenesis and determines the role that this knowledge is playing in the development of potential therapies.
Recent Findings:
Study of simple and syndromic forms of polycystic kidney disease has revealed that the defective proteins are localized to the primary cilia/basal body and that the pleiotropic phenotypes are often associated with defective ciliogenesis. Data indicating that the polycystins are involved in ciliary mechanosensation, and cellular changes in intracellular Ca and cAMP, have provided clues for possible therapeutic approaches that have proved highly effective in pre-clinical trials.
Summary:
Polycystic kidney diseases are associated with defects to proteins involved in developing functional, sensory cilia in the kidney. While the primary defects in these disorders cannot be corrected at present, downsteam cellular changes can be targeted. Potential therapeutic agents are now being tested in patients, moving polycystic kidney disease research into a new and exciting phase.
Insights
Polycystic kidney diseases stem from defective proteins in kidney cilia. Targeting downstream cellular changes offers promising therapeutic strategies currently in patient trials.
Area of Science:
- Nephrology
- Genetics
- Cell Biology
Background:
- Polycystic kidney diseases (PKDs) are inherited disorders characterized by kidney cyst formation.
- These conditions arise from genetic defects affecting specific proteins within kidney cells.
Purpose of the Study:
- To review the common pathogenesis of polycystic kidney diseases.
- To explore the role of identified defective proteins in disease development.
- To determine how this knowledge informs potential therapeutic strategies.
Main Methods:
- Review of scientific literature on polycystic kidney diseases.
- Analysis of protein localization and function in relation to cilia.
- Examination of cellular signaling pathways implicated in PKDs.
Main Results:
- Defective proteins in PKDs are localized to primary cilia/basal body.
- Phenotypes are often linked to impaired ciliogenesis.
- Polycystins' role in ciliary mechanosensation and cellular signaling (Ca2+, cAMP) identified.
Conclusions:
- PKDs involve defects in proteins crucial for kidney cilia function.
- While primary defects are uncorrectable, downstream cellular pathways can be targeted.
- Therapeutic agents targeting these pathways are in clinical trials, marking a new phase in PKD research.
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