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Related Concept Videos

Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon towards...
Cancer Cell Migration through Invadopodia01:35

Cancer Cell Migration through Invadopodia

Invadosome is a broad category of cell surface structures with proteolytic activity that  degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...
Cancer Stem Cells and Tumor Maintenance02:40

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...

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Updated: Jun 21, 2026

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
06:09

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Published on: June 7, 2019

Melanoma-initiating cells: a compass needed.

Yosef Refaeli1, Anindita Bhoumik, Dennis R Roop

  • 1Charles C Gates Regenerative Medicine and Stem Cell Program, Department of Dermatology, University of Colorado Denver, Aurora, Colorado 80045, USA.

EMBO Reports
|August 15, 2009
PubMed
Summary
This summary is machine-generated.

Tumor heterogeneity arises from diverse cancer cell populations and differentiation. Melanoma-initiating cells are key drivers of tumor growth and recurrence, but their exact nature and importance remain debated.

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Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
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Area of Science:

  • Oncology
  • Cancer Biology
  • Melanoma Research

Background:

  • Tumors exhibit heterogeneity due to genetic mutations and deregulated differentiation.
  • Tumor-initiating cells (TICs) are proposed subpopulations driving tumor initiation, metastasis, and recurrence.
  • Recent research questions the nature, frequency, and significance of melanoma-initiating cells.

Purpose of the Study:

  • To review current understanding of melanoma-initiating cells.
  • To discuss ongoing controversies regarding melanoma-initiating cells.
  • To propose approaches for resolving these controversies.

Main Methods:

  • Literature review and synthesis of recent studies on melanoma-initiating cells.
  • Discussion of experimental and conceptual challenges in TIC research.
  • Analysis of different models for tumor heterogeneity and cell differentiation.

Main Results:

  • Melanoma heterogeneity can be explained by diverse cancer cell populations or by differentiation from TICs.
  • TICs are implicated in tumor initiation, progression, metastasis, and therapeutic resistance.
  • Significant debate exists regarding the precise characteristics and role of melanoma-initiating cells.

Conclusions:

  • Understanding melanoma-initiating cells is crucial for deciphering tumor heterogeneity and developing effective therapies.
  • Further research is needed to clarify the identity, frequency, and functional importance of melanoma-initiating cells.
  • Standardized approaches are required to resolve current controversies in the field.