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Cancers Originate from Somatic Mutations in a Single Cell

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 Cell

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...

Cancer-Critical Genes I: Proto-oncogenes

Cancer-Critical Genes I: Proto-oncogenes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

Cancer-Critical Genes I: Proto-oncogenes

Cancer-Critical Genes I: Proto-oncogenes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

Cancer-Critical Genes II: Tumor Suppressor Genes

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

Cancer-Critical Genes II: Tumor Suppressor Genes

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

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Related Experiment Video

Updated: Jul 14, 2026

Long-term Live-cell Imaging to Assess Cell Fate in Response to Paclitaxel

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[Genome instability and oncogenesis].

Molekuliarnaia Biologiia

|May 23, 2007

Summary

Genetic instability drives tumor development through increased mutagens, replication errors, and faulty DNA repair. New therapies aim to reduce instability or target defective cancer cells.

Area of Science:

Oncology
Molecular Biology
Genetics

Context:

Genetic instability is a hallmark of cancer.
Tumorigenesis is influenced by molecular alterations.
Understanding these alterations is crucial for cancer treatment.

Purpose:

To review the fundamental causes of genetic instability in tumor cells.
To discuss the tissue-specific nature of tumorigenesis.
To explore novel therapeutic strategies targeting genetic instability.

Summary:

Key factors contributing to genetic instability include elevated reactive oxygen species (ROS), reduced DNA replication and chromosome segregation fidelity, impaired DNA repair mechanisms, and compromised cell cycle checkpoints.
These molecular defects permit the proliferation of abnormal cells, driving tumor formation.

More Related Videos

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

Published on: February 24, 2014

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Last Updated: Jul 14, 2026

Long-term Live-cell Imaging to Assess Cell Fate in Response to Paclitaxel

Long-term Live-cell Imaging to Assess Cell Fate in Response to Paclitaxel

Published on: May 14, 2018

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

Published on: February 24, 2014

The review also examines how tissue specificity influences tumorigenesis and the development of targeted therapies.

Impact:

Provides a comprehensive overview of genetic instability in cancer.
Highlights the mechanisms underlying tumor development.
Discusses innovative therapeutic avenues for cancer treatment.