Oncogene addiction: role of signal attenuation

Anette Hübner1, Anja Jaeschke, Roger J Davis

  • 1Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.

Developmental Cell
|December 5, 2006
PubMed

Insights

Tumors can become addicted to oncogene signaling. This addiction may be driven by differing speeds in the attenuation of cell death and survival pathways.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • Tumorigenesis is often driven by aberrant signaling pathways initiated by oncogenes.
  • Cancer cells can develop a dependency on these oncogenic signals for growth and survival, a phenomenon termed "oncogene addiction".

Discussion:

  • Sharma et al. (2006b) investigated the molecular mechanisms underlying oncogene addiction.
  • The study proposes that differential signal attenuation rates between proapoptotic and prosurvival pathways mediate this dependency.

Key Insights:

  • Oncogene addiction is a critical vulnerability in cancer.
  • The balance between proapoptotic and prosurvival signaling is crucial for maintaining oncogene dependency.
  • Targeting these differential attenuation rates could offer novel therapeutic strategies.

Outlook:

  • Further research is needed to elucidate the specific molecular players involved in differential signal attenuation.
  • Understanding these mechanisms could lead to the development of more effective targeted cancer therapies.
  • Exploring therapeutic interventions that exploit oncogene addiction holds significant promise for cancer treatment.

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...
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...
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...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
The Ras Gene02:38

The Ras Gene

The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...