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Related Concept Videos

Whole Body Regeneration01:33

Whole Body Regeneration

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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

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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...
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Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

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Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
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Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Related Experiment Video

Updated: Mar 19, 2026

Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting
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Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting

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Could we also be regenerative superheroes, like salamanders?

Alessandra Dall'Agnese1,2, Pier Lorenzo Puri2,3

  • 1Graduate School of Biomedical Sciences, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|June 25, 2016
PubMed
Summary
This summary is machine-generated.

Salamanders regenerate limbs in adulthood, unlike humans. Studying these amphibians offers insights into reawakening human regenerative potential for tissue repair and organ restoration.

Keywords:
axolotlfibrosismetamorphosisnewtregeneration

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Author Spotlight: Exploring the Role of Mechanical Signals in Tissue Regeneration Through Atomic Force Microscopy
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Area of Science:

  • Regenerative medicine
  • Comparative biology
  • Developmental biology

Background:

  • Human regenerative potential is largely suppressed in adulthood.
  • Urodele amphibians (salamanders) retain significant regenerative abilities throughout adulthood.
  • Studies in newts and axolotls provide models for understanding adult limb regeneration.

Purpose of the Study:

  • To compare salamander and mammalian regeneration.
  • To explore methods for reawakening dormant regenerative potential in human tissues.
  • To discuss exploiting evolutionary differences for human regenerative therapies.

Main Methods:

  • Comparative analysis of regenerative processes in salamanders and mammals.
  • Review of existing literature on salamander limb regeneration.
  • Discussion of evolutionary alterations in regenerative environments.

Main Results:

  • Salamanders possess unique mechanisms for successful adult limb regeneration.
  • Mammalian regenerative capacity is significantly limited compared to urodeles.
  • Understanding the molecular and cellular basis of salamander regeneration is key.

Conclusions:

  • Reawakening latent regenerative potential in humans is a promising therapeutic goal.
  • Comparative studies of urodele amphibians offer valuable insights for human regenerative medicine.
  • Exploiting evolutionary differences in regenerative environments may lead to novel treatments for tissue and organ damage.