Related Experiment Video
Updated: Jul 9, 2026
09:41
Reconstitution Of β-catenin Degradation In Xenopus Egg Extract
Published on: June 17, 2014
Beta-catenin is temporally regulated during normal liver development.
Amanda Micsenyi1, Xinping Tan, Tamara Sneddon
1Department of Pathology, University of Pittsburgh, School of Medicine, PA 15261, USA.
Gastroenterology
|April 2, 2004
Summary
Beta-catenin, crucial for liver growth, shows dynamic expression during development. Its nuclear and cytoplasmic presence correlates with cell proliferation, while membrane localization is maintained by smaller beta-catenin forms.
Area of Science:
- Hepatology
- Developmental Biology
- Molecular Biology
Background:
- Beta-catenin is a key Wnt pathway component involved in liver growth.
- It plays roles in liver tumors, regeneration, and embryonic liver cultures.
Purpose of the Study:
- To examine beta-catenin expression, localization, and regulation during liver development.
- To understand its role in prenatal and postnatal liver development.
Main Methods:
- Analysis of developing livers across gestational stages.
- Utilized microarray, Northern, and protein analyses.
- Investigated protein-protein interactions and cellular localization.
Main Results:
- Peak beta-catenin expression observed at embryonic days 10-12, decreasing significantly after embryonic day 16.
- Early stages showed cytoplasmic and nuclear beta-catenin localization, correlating with cell proliferation.
- Decreased beta-catenin levels linked to reduced gene expression and increased degradation.
Conclusions:
- Beta-catenin exhibits stage-specific expression critical for physiological liver development.
- Nuclear and cytoplasmic beta-catenin are associated with liver cell proliferation.
- Smaller beta-catenin species may maintain membrane interactions during development.
More Related Videos
Related Concept Videos
01:58Cell 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...
02:54Canonical 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...
01:24Regulation of Angiogenesis and Blood Supply
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
02:54Canonical 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...
01:23Catenins
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...
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...
01:24Liver Regeneration
The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are large...
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are large...