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Related Concept Videos

Tissue Transplantation01:24

Tissue Transplantation

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Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
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Whole Body Regeneration01:33

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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
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Tissue Renewal without Stem Cells01:23

Tissue Renewal without Stem Cells

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After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
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Related Experiment Video

Updated: Sep 29, 2025

Taking the Next Step: a Neural Coaptation Orthotopic Hind Limb Transplant Model to Maximize Functional Recovery in Rat
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Hand Transplants, Daily Functioning, and the Human Capacity for Limb Regeneration.

Susan M Fitzpatrick1, David Brogan2, Prateek Grover3,4

  • 1James S. McDonnell Foundation, St. Louis, MO, United States.

Frontiers in Cell and Developmental Biology
|March 21, 2022
PubMed
Summary
This summary is machine-generated.

Humans cannot regenerate limbs like some animals. Hand transplants offer a functional alternative to prosthetics, requiring nerve regeneration and brain reconnection, but face medical and ethical questions.

Keywords:
delivery of carefunctionalhandmicrosurgeryprosthesis and implantsregenerationrehabilitationtransplantation

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Area of Science:

  • Regenerative Medicine
  • Transplantation Surgery
  • Neuroscience

Background:

  • Humans lack the limb regeneration capacity seen in some species.
  • Limb loss, particularly lower limbs, significantly impacts quality of life.
  • Current prosthetic and assistive technologies have limitations in restoring full hand function.

Purpose of the Study:

  • To explore hand transplantation as a viable option for individuals with upper limb loss.
  • To examine the regenerative and neuro-rehabilitative aspects of hand transplantation.
  • To discuss the medical and ethical considerations surrounding human hand transplantation.

Main Methods:

  • Review of current literature on limb regeneration, amputation, prosthetics, and hand transplantation.
  • Analysis of the surgical and neuro-rehabilitative requirements for successful hand transplants.
  • Discussion of ethical challenges and future research directions.

Main Results:

  • Hand transplantation requires significant tissue and nerve regeneration, akin to natural regeneration.
  • Successful functional recovery depends on the brain's ability to integrate the transplanted hand.
  • Hand transplantation presents complex medical and ethical questions requiring further investigation.

Conclusions:

  • Hand transplantation is a complex procedure that necessitates substantial regeneration and neural adaptation.
  • While not true regeneration, it offers a path to improved function for amputees.
  • Further research is crucial to address safety, efficacy, and ethical concerns before wider application.