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Related Concept Videos

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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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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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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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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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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What is Cancer?

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Cells and tissues must meticulously coordinate their activities for the normal functioning of the human body. Therefore, they exhibit socially responsible behavior - resting, growing, dividing, differentiating, or dying - for the organism’s benefit. Cancer arises when cells divide uncontrollably and invade other tissues or organs.
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Relationships between stem cells and cancer stem cells.

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  • 1Center for Craniofacial Molecular Biology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA. dcrowe@usc.edu

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Transformed stem cells may drive human tumor growth and recurrence due to their self-renewal capacity. Identifying and targeting these cancer stem cells could lead to more effective cancer treatments.

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Area of Science:

  • Stem cell biology
  • Oncology
  • Cancer therapeutics

Background:

  • Stem cells possess self-renewal properties, crucial for tissue regeneration.
  • Tumorigenesis and recurrence may involve a subpopulation of cancer stem cells.
  • Shared signaling pathways regulate self-renewal in normal and transformed stem cells.

Purpose of the Study:

  • To explore the role of cancer stem cells in tumor growth and recurrence.
  • To investigate the potential of targeting cancer stem cells for therapeutic strategies.

Main Methods:

  • Characterization of stem cell gene expression and phenotypes.
  • Analysis of self-renewal mechanisms in normal and transformed stem cells.
  • Conceptualization of the cancer stem cell model for tumor behavior.

Main Results:

  • Cancer stem cells, characterized by self-renewal, may drive tumorigenesis.
  • Tumor recurrence could result from the repopulation by non-targeted cancer stem cells.
  • The cancer stem cell model provides a framework for understanding tumor progression.

Conclusions:

  • Cancer stem cells are a potential driver of tumor growth and recurrence.
  • Targeted therapies against cancer stem cells may improve clinical outcomes.
  • Prospective identification and isolation of cancer stem cells are key for developing selective treatments.