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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

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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
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Generation of Transgenic Hydra by Embryo Microinjection
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Model systems for regeneration: Hydra.

Matthias C Vogg1, Brigitte Galliot2, Charisios D Tsiairis3

  • 1Department of Genetics and Evolution, Institute of Genetics and Genomics in Geneva (iGE3), Faculty of Sciences, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland.

Development (Cambridge, England)
|November 3, 2019
PubMed
Summary
This summary is machine-generated.

The freshwater polyp Hydra, a simple model organism, regenerates exceptionally well. Recent findings challenge existing models of Hydra regeneration, suggesting a need to integrate biochemical and mechanical signaling for a complete understanding.

Keywords:
Genetic manipulationsHydra model systemOrganizer centreOrganoidReaggregationRegeneration

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Area of Science:

  • Developmental Biology
  • Regenerative Medicine
  • Model Organisms

Background:

  • The freshwater polyp Hydra is a powerful model for studying regeneration.
  • Hydra can regenerate an entire body axis from dissociated single cells, functioning as natural organoids.
  • Recent advancements in live imaging, genetic tools, and omics data have expanded Hydra's utility.

Purpose of the Study:

  • To provide an overview of Hydra as a model system for regeneration research.
  • To highlight recent findings that challenge the classical model of Hydra regeneration.
  • To emphasize the need for integrated signaling models.

Main Methods:

  • Review of existing literature and recent research findings.
  • Analysis of classical models versus new experimental data.
  • Discussion of advanced techniques like live imaging and genetic manipulation.

Main Results:

  • Recent results question the established self-enhancement and long-range inhibition model for Hydra regeneration.
  • The classical model may be insufficient to explain the complex process of regeneration.
  • New data suggests a more nuanced understanding is required.

Conclusions:

  • Hydra remains a crucial model for understanding fundamental principles of regeneration.
  • Integrated explanations incorporating both biochemical and mechanical signaling are necessary.
  • Future research should focus on unifying diverse signaling pathways to explain regeneration outcomes.