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Implementing Patch Clamp and Live Fluorescence Microscopy to Monitor Functional Properties of Freshly Isolated PKD Epithelium
Published on: September 1, 2015
Polycystic kidney disease: cell division without a c(l)ue?
1Renal Division, University Hospital Freiburg, Freiburg, Germany. matias.simons@mssm.edu
Kidney International
|July 4, 2006
Summary
The cilium and basal body/centrosome complex are crucial for kidney development by regulating planar cell polarity. Disruptions in this pathway lead to polycystic kidney disease due to abnormal cell division.
Area of Science:
- Cell Biology
- Genetics
- Developmental Biology
Background:
- Polycystic kidney disease (PKD) arises from diverse genetic causes.
- The ciliary hypothesis links cystogenesis to impaired ciliary function and calcium signaling.
- Downstream pathways of ciliary calcium flux in PKD have been unclear.
Purpose of the Study:
- To explore the role of cilia and basal body/centrosome complex in planar cell polarity.
- To understand how these structures influence cell orientation and division in kidney development.
- To identify novel pathways involved in polycystic kidney disease pathogenesis.
Main Methods:
- Review of recent reports on ciliary function and planar cell polarity.
- Analysis of genetic mutations associated with PKD and related ciliopathies.
- Investigation of protein localization and signaling pathways, including Wnt cascades.
Main Results:
- Cilia and basal body/centrosome complex are implicated in planar cell polarity.
- Inversin acts as a switch in Wnt signaling, regulating tubular differentiation.
- Defects in Bardet-Biedl syndrome proteins cause planar cell polarity defects.
- Proper centrosome and mitotic spindle positioning by cilia is essential for tubular epithelial cell division.
Conclusions:
- The cilium/basal body/centrosome complex provides spatial cues for oriented cell division.
- Failure in communicating spatial information leads to uncontrolled cell proliferation and cyst formation in PKD.
- Planar cell polarity pathways are critical for normal kidney development and preventing cystogenesis.
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