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Cancer Stem Cells and Tumor Maintenance

Cancer Stem Cells and Tumor Maintenance

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...

Cancer Stem Cells and Tumor Maintenance

Cancer Stem Cells and Tumor Maintenance

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...

Distinctive Features of Adult Stem Cells vs Cancer Stem Cells

Distinctive Features of Adult Stem Cells vs Cancer Stem Cells

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:...

Multipotency of Hematopoietic Stem Cells

Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...

Renewal of Skin Epidermal Stem Cells

Renewal of Skin Epidermal Stem Cells

The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...

Adaptive Mechanisms in Cancer Cells

Adaptive Mechanisms in Cancer Cells

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.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...

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Related Experiment Video

Updated: Jun 12, 2026

Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics

Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics

Published on: May 11, 2016

Cancer stem cells and self-renewal.

Catherine Adell O'Brien¹, Antonija Kreso, Catriona H M Jamieson

¹Division of General Surgery, University Health Network, University of Toronto, Toronto, Ontario, Canada.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research

|June 10, 2010

Summary

Cancer stem cells (CSCs) drive tumor growth by hijacking normal self-renewal pathways. Understanding CSC self-renewal is key to deciphering tumor maintenance and developing new cancer therapies.

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Last Updated: Jun 12, 2026

Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics

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Radiosensitivity of Cancer Stem Cells in Lung Cancer Cell Lines

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Area of Science:

Oncology
Cancer Biology
Stem Cell Research

Background:

The cancer stem cell (CSC) model proposes a hierarchical organization within tumors, with CSCs at the apex.
CSCs are defined by their ability to self-renew and generate diverse tumor cells, driving cancer initiation and maintenance.
Similar hierarchical structures and CSCs have been identified in both leukemia and various solid tumors.

Purpose of the Study:

To review the concept of cancer stem cells (CSCs) and their role in tumor formation.
To address controversies and clarify the defining features of CSCs.
To emphasize the importance of studying CSC self-renewal for understanding tumor growth.

Main Methods:

Review of existing literature on cancer stem cells (CSCs).
Analysis of the defining characteristics of CSCs, including xenograft generation and serial transplantation.
Discussion of the role of self-renewal pathways in cancer development and CSC maintenance.

Main Results:

CSCs possess the unique ability to self-renew and regenerate all aspects of a tumor.
Dysregulated self-renewal pathways are crucial for malignant transformation and tumor growth.
The complexity of CSC phenotype can lead to confusion, but self-renewal remains the core defining feature.

Conclusions:

The cancer stem cell (CSC) model is central to understanding tumor heterogeneity and progression.
Focusing on the dysregulated self-renewal capacity of CSCs is essential for advancing cancer research.
Studying CSC self-renewal mechanisms offers potential for novel therapeutic strategies targeting tumor growth.