Related Experiment Video

Updated: Jun 3, 2026

Implementing Patch Clamp and Live Fluorescence Microscopy to Monitor Functional Properties of Freshly Isolated PKD Epithelium
08:46

Implementing Patch Clamp and Live Fluorescence Microscopy to Monitor Functional Properties of Freshly Isolated PKD Epithelium

Published on: September 1, 2015

T-cell factor/β-catenin activity is suppressed in two different models of autosomal dominant polycystic kidney

Michelle M Miller1, Diana M Iglesias, Zhao Zhang

  • 1Department of Human Genetics, McGill University-Montreal Children's Hospital Research Institute, McGill University Health Centre Research Institute and McGill University, Montreal, Quebec, Canada.

Kidney International
|March 11, 2011
PubMed

Insights

Canonical WNT signaling suppression is normal in mouse models of autosomal dominant polycystic kidney disease (ADPKD). This suggests excessive beta-catenin activity may not drive cyst formation in ADPKD.

Area of Science:

  • Nephrology
  • Developmental Biology
  • Genetics

Background:

  • Canonical WNT signaling is crucial during kidney development, with activity normally restricted as development progresses.
  • Mutations in PKD1 and PKD2 genes cause autosomal dominant polycystic kidney disease (ADPKD).
  • Previous research suggested that ADPKD mutations might impair the suppression of WNT signaling, potentially contributing to cyst development.

Purpose of the Study:

  • To investigate whether impaired suppression of canonical WNT signaling contributes to cystogenesis in mouse models of ADPKD.
  • To determine if beta-catenin transcriptional activity is altered in renal cysts of Pkd1 and Pkd2 mutant mice.

Main Methods:

  • Utilized a T-cell factor (TCF)/beta-catenin-lacZ reporter mouse model.
  • Crossed reporter mice with mice carrying mutations in Pkd1 or Pkd2.
  • Assessed beta-galactosidase staining in renal cysts to evaluate WNT signaling activity.

Main Results:

  • No beta-galactosidase staining was observed in the cells lining the renal cysts in either Pkd1 or Pkd2 mutant mice.
  • This indicates normal suppression of canonical WNT activity, as reported by the TCF/beta-catenin-lacZ reporter, in these ADPKD models.
  • The findings challenge the hypothesis that excessive beta-catenin transcriptional activity drives cyst formation in these specific ADPKD models.

Conclusions:

  • Suppression of canonical WNT signaling is maintained in mouse models of ADPKD with Pkd1 or Pkd2 mutations.
  • Excessive beta-catenin transcriptional activity is unlikely to be a primary driver of cystogenesis in these ADPKD models.
  • Further research is needed to elucidate the precise mechanisms underlying cyst formation in ADPKD.

More Related Videos

Reconstitution Of β-catenin Degradation In Xenopus Egg Extract09:41

Reconstitution Of β-catenin Degradation In Xenopus Egg Extract

Published on: June 17, 2014

Related Concept Videos

Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Catenins01:23

Catenins

Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...