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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

Cancer

Cancers arise due to mutations in genes involved in the regulation of cell division, which leads to unrestricted cell proliferation. Modern science and medicine have made great strides in the understanding and treatment of cancer, including eradicating cancer in some patients. However, there is still no cure for cancer. This is largely due to the fact that cancer is a large group of many diseases.

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...

Tumor Progression

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...

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Related Experiment Video

Updated: Jul 4, 2026

Oncogene Expression Analysis with Alterations in pH in a Pancreatic Ductal Cell Line

Oncogene Expression Analysis with Alterations in pH in a Pancreatic Ductal Cell Line

Published on: April 11, 2025

[Cancer and oncogenesis].

¹Uit de afdeling Mondziekte, Kaak- en Aangezichtschirurgie/Orale Pathologie van het Vrije Universiteit Medisch Centrum in Amsterdam, Academisch Centrum voor Tandheelkunde Amsterdam (ACTA), Amsterdam. e.bloemena@vumc.nl

Nederlands Tijdschrift Voor Tandheelkunde

|June 3, 2008

Summary

Cancer, or malignant neoplasms, results from unregulated cell growth due to genetic alterations. Key genes like oncogenes and tumor suppressor genes are crucial in cancer development, often preceded by dysplasia.

Area of Science:

Oncology
Molecular Biology
Genetics

Context:

Cancer is defined as malignant neoplasms characterized by invasive growth and metastasis.
Neoplasia originates from unregulated cellular proliferation driven by genomic alterations.
Dysplasia represents a recognizable premalignant stage preceding invasive cancer.

Purpose:

To define cancer and its fundamental biological mechanisms.
To highlight the genetic underpinnings of uncontrolled cell growth.
To introduce key gene categories involved in oncogenesis.

Summary:

Cancer, or malignant neoplasms, involves uncontrolled cell growth and spread, stemming from accumulated genetic defects.
These genetic alterations disrupt normal cellular responses to regulatory signals.

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Key genetic players include oncogenes, tumor suppressor genes, and DNA mismatch repair genes, with dysplasia often preceding malignancy.

Impact:

Provides a foundational understanding of cancer biology and etiology.
Emphasizes the critical role of genetic mutations in cancer initiation.
Establishes the significance of specific gene families in the development of malignant tumors.