Oncogenes and tumor suppressor genes

R A Weinberg1

  • 1Whitehead Institute for Biomedical Research, Department of Biology, Massachusetts Institute of Technology in Cambridge, USA.

Insights

Over 15 years, research revealed how oncogenes and tumor suppressor genes drive cancer development. This review details their specific roles in tumor formation and carcinogenesis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Significant advancements in understanding cancer's molecular origins over the last 15 years.
  • Established the critical roles of oncogenes and tumor suppressor genes in the process of carcinogenesis.

Purpose of the Study:

  • To review the mechanisms by which oncogenes and tumor suppressor genes contribute to tumor creation.
  • To synthesize current knowledge on gene involvement in cancer development.

Main Methods:

  • Literature review of molecular oncology research.
  • Analysis of studies focusing on oncogene and tumor suppressor gene functions.
  • Synthesis of data on gene regulation and cellular transformation.

Main Results:

  • Detailed elucidation of oncogene activation pathways in cancer.
  • Explanation of tumor suppressor gene inactivation mechanisms.
  • Understanding of how these genetic alterations lead to uncontrolled cell growth.

Conclusions:

  • Oncogenes and tumor suppressor genes are central players in cancer initiation and progression.
  • A comprehensive understanding of these genes is crucial for developing targeted cancer therapies.
  • Continued research into molecular carcinogenesis mechanisms is vital.

Related Concept Videos

Cancer-Critical Genes I: Proto-oncogenes01:33

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...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

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 I: Proto-oncogenes01:33

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 Genes01:05

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...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...