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Related Concept Videos

Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

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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.
Types of Stem Cells used in Stem Cell Therapy
The two main cell...
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Cancer Stem Cells and Tumor Maintenance02:40

Cancer Stem Cells and Tumor Maintenance

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Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
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DNA Damage can Stall the Cell Cycle02:37

DNA Damage can Stall the Cell Cycle

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In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
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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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Mutations01:35

Mutations

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
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Distinctive Features of Adult Stem Cells vs Cancer Stem Cells01:18

Distinctive Features of Adult Stem Cells vs Cancer Stem Cells

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A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
Adult stem cells
Adult stem cells are tissue-specific; hence, they divide to develop the tissue from which they originate. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of the skin. Adult bone marrow has three distinct types of stem cells:...
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Intestinal Epithelial Regeneration in Response to Ionizing Irradiation
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Function of stem cells in radiation-induced damage.

Yingtong Liu1, Zheran Liu2, Liqiang Hu3

  • 1School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, and Cancer Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China.

International Journal of Radiation Biology
|March 13, 2023
PubMed
Summary
This summary is machine-generated.

This review explores stem cell function in radiation damage, highlighting key factors and cell types crucial for developing effective stem cell therapies for tissue regeneration after radiation exposure.

Keywords:
Radiotherapyhematopoietic stem cells (HSCs)intestinal glandspancreassalivary glandsstem cells

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Area of Science:

  • Stem cell biology
  • Radiation oncology
  • Regenerative medicine

Background:

  • Radiation exposure significantly impacts normal tissue function, necessitating strategies for repair and regeneration.
  • Stem cells play a critical role in tissue homeostasis and repair following radiation-induced damage.
  • Understanding the microenvironment and cellular interactions is vital for optimizing stem cell therapies.

Approach:

  • This review synthesizes existing research on stem cell behavior under radiation stress.
  • It examines the influence of specific cell types and signaling molecules on stem cell function.
  • The focus is on identifying factors that modulate stem cell responses to radiation.

Key Points:

  • In salivary glands, senescence-associated cytokines and inflammatory cells influence stem cells.
  • Paneth cells are critical for intestinal stem cell regeneration post-irradiation.
  • Beta-cells and Procr cells show potential for pancreatic stem cell therapy in diabetes.
  • Cytokines like CXCL12 and SCF support hematopoietic stem cell recovery in bone marrow.

Conclusions:

  • Effective stem cell-based therapies require a deep understanding of stem cell types and their surrounding communication networks.
  • Targeting specific cellular interactions and microenvironmental factors can enhance tissue repair after radiation.
  • Further research into these mechanisms will advance regenerative medicine and improve patient outcomes following radiation treatment.