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Spectral Karyotyping to Study Chromosome Abnormalities in Humans and Mice with Polycystic Kidney Disease
12:47

Spectral Karyotyping to Study Chromosome Abnormalities in Humans and Mice with Polycystic Kidney Disease

Published on: February 3, 2012

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Polycystic kidney disease

Peter C Harris1, Vicente E Torres

  • 1Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota 55905, USA. harris.peter@mayo.edu

Annual Review of Medicine
|October 25, 2008
PubMed

Insights

Inherited kidney diseases like autosomal dominant polycystic kidney disease (ADPKD) and ARPKD involve genetic mutations affecting cilia. Understanding these cellular defects reveals potential therapeutic targets for cyst development.

Area of Science:

  • Nephrology
  • Genetics
  • Cell Biology

Background:

  • Inherited disorders frequently cause renal cyst development.
  • Autosomal dominant polycystic kidney disease (ADPKD) and ARPKD are key forms, impacting adults and neonates, respectively.
  • Mutations in PKD1/PKK2 (ADPKD) and PKHD1 (ARPKD) disrupt cilia function.

Purpose of the Study:

  • To summarize the genetic basis and cellular mechanisms of inherited polycystic kidney diseases (PKD).
  • To highlight the role of cilia and associated proteins in kidney and biliary tract epithelial differentiation.
  • To discuss potential therapeutic strategies emerging from understanding these diseases.

Main Methods:

  • Review of genetic mutations (PKD1, PKD2, PKHD1) and protein functions (polycystin-1, polycystin-2, fibrocystin).
  • Analysis of protein localization in primary cilia and basal bodies.
  • Examination of signaling pathways (Wnt, Hh) implicated in pathogenesis.

Main Results:

  • ADPKD and ARPKD result from mutations in specific genes, affecting cilia-localized proteins.
  • The polycystin complex acts as a mechanosensor, crucial for epithelial maintenance.
  • Fibrocystin interacts with polycystin-2, and both localize to cilia.
  • Syndromic forms of PKD involve broader developmental defects, implicating cilia and signaling pathways.

Conclusions:

  • Defective cellular processes in PKD highlight the critical role of cilia.
  • Understanding these mechanisms provides a basis for developing novel therapies.
  • Ongoing clinical trials are exploring these potential treatments for polycystic kidney diseases.

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