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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
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Forced Transdifferentiation01:28

Forced Transdifferentiation

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Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
Artificial...
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Stem Cell Therapy for Tissue Regeneration01:21

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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
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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.
However, failure of such a system...
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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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Related Experiment Video

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Planarian Immobilization, Partial Irradiation, and Tissue Transplantation
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Challenging Regeneration to Transform Medicine.

Ann Tsukamoto1, Stewart E Abbot2, Lisa C Kadyk3

  • 1StemCells, Inc., Newark, California, USA Ann.Tsukamoto@stemcellsinc.com.

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Summary

Developing universal donor tissues through regenerative medicine can overcome organ shortages and rejection issues. A national initiative could accelerate breakthroughs in treating degenerative diseases within a decade.

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Area of Science:

  • Regenerative Medicine
  • Transplantation Immunology
  • Biotechnology

Background:

  • Aging populations increase degenerative diseases, straining healthcare systems.
  • Organ transplantation is limited by donor availability and immune rejection.
  • Regenerative medicine offers potential solutions for organ and tissue repair/replacement.

Purpose of the Study:

  • Propose a "Regenerative Medicine Grand Challenge" focused on developing universal donor tissues.
  • Address the limitations of current transplantation methods.
  • Catalyze advancements in regenerative medicine through public-private partnerships and policy.

Main Methods:

  • Outline key policy changes and technological challenges for universal donor tissue development.
  • Advocate for a coordinated national effort involving multidisciplinary expertise.
  • Leverage public-private partnerships and government incentives.

Main Results:

  • A nationalized effort could yield universal donor tissues within 10 years.
  • Significant innovation in manufacturing technologies is anticipated.
  • Broad medical and economic benefits are expected.

Conclusions:

  • Regenerative therapies hold promise for curing chronic degenerative diseases.
  • Universal donor tissues would eliminate the need for immune suppression and address donor shortages.
  • A coordinated 21st Century Grand Challenge is proposed to manufacture universally available, engraftable tissues or organs.