Related Experiment Video
Updated: Jul 18, 2026
04:24
Inhibition of Wound Epidermis Formation via Full Skin Flap Surgery During Axolotl Limb Regeneration
Published on: June 24, 2020
Extracellular matrix protein turnover during salamander limb regeneration
1Department of Molecular Genetics, The Ohio State University, Columbus, Ohio 43210, USA.
Summary
Salamander limb regeneration involves extracellular matrix remodeling. Key proteins like tenascin and fibronectin are crucial for both embryonic limb development and adult limb regeneration.
Area of Science:
- Regenerative Biology
- Developmental Biology
- Extracellular Matrix Research
Background:
- Limb regeneration in salamanders requires significant extracellular matrix (ECM) remodeling.
- The ECM transitions from a differentiated state to one supporting dedifferentiation and blastema formation.
Purpose of the Study:
- To investigate the roles of specific ECM proteins during salamander limb regeneration.
- To compare the expression patterns of ECM components in adult regenerating limbs and embryonic limb buds.
Main Methods:
- Immunohistochemistry using monoclonal antibodies.
- In situ hybridization with riboprobes to detect specific ECM proteins.
Main Results:
- Stump 1 antigen is downregulated during regeneration and reappears late, similar to its embryonic expression pattern.
- Tenascin and fibronectin are upregulated in both regenerating adult limbs and embryonic limb buds.
- Type XII collagen and MT5 antigen are present in regenerating limbs but absent in embryonic limb buds.
Conclusions:
- Tenascin and fibronectin play conserved roles in both limb development and regeneration.
- Type XII collagen and MT5 antigen appear specific to adult limb regeneration, not embryonic limb development.
More Related Videos
Related Concept Videos
01:23Role of Matrix Metalloproteases in Degradation of ECM
Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult body.
A...
A...
01:29The Extracellular Matrix
Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
01:42The Extracellular Matrix
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.Composition of the Extracellular MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.
01:26Extracellular Matrix
Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
01:28Phases of Wound Repair
Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
01:19Overview of Regeneration and Repair
Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
All animals have varying degrees of...
Regeneration
All animals have varying degrees of...