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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

Somatic inactivation of Pkd2 results in polycystic kidney disease

G Wu1, V D'Agati, Y Cai

  • 1Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA.

Cell
|May 6, 1998
PubMed

Insights

Autosomal dominant polycystic kidney disease (ADPKD) arises from PKD2 gene mutations. Somatic loss of PKD2 protein in kidney tubule cells is necessary and sufficient for cyst formation, indicating a cellular recessive mechanism for ADPKD.

Area of Science:

  • Genetics
  • Molecular Biology
  • Nephrology

Background:

  • Autosomal dominant polycystic kidney disease (ADPKD) is a genetic disorder.
  • Germline mutations in the PKD2 gene are a known cause of ADPKD.
  • Understanding the molecular mechanisms of ADPKD is crucial for developing treatments.

Purpose of the Study:

  • To investigate the role of Pkd2 gene inactivation in ADPKD.
  • To determine if somatic loss of Pkd2 is sufficient for cystogenesis.
  • To explore the mechanism of cyst formation in ADPKD.

Main Methods:

  • Generation of a mouse model with an unstable Pkd2 allele.
  • Induction of somatic inactivation of the Pkd2 gene via intragenic homologous recombination.
  • Phenotypic analysis of polycystic kidney and liver lesions in mutant mice.

Main Results:

  • Mice with Pkd2 mutations developed polycystic kidney and liver lesions similar to human ADPKD.
  • Renal cysts originated from renal tubular cells that lost Pkd2 protein expression.
  • Somatic loss of Pkd2 expression was demonstrated to be both necessary and sufficient for renal cyst formation.

Conclusions:

  • Somatic loss of Pkd2 is a critical event in the development of ADPKD.
  • ADPKD pathogenesis likely follows a cellular recessive mechanism.
  • These findings provide insights into the cellular basis of ADPKD.

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