Signalling networks that cause cancer

F McCormick1

  • 1UCSF Cancer Center, Cancer Research Institute, 2340 Sutter St, San Francisco, CA 94115, USA. mccormick@cc.ucsf.edu

Trends in Cell Biology
|December 28, 1999
PubMed

Insights

Cancer arises from accumulating mutations impacting cell growth and survival. These genetic changes interact across multiple pathways, challenging simple models and influencing cancer therapy strategies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Cancer develops through the accumulation of genetic mutations affecting critical cellular processes like growth, differentiation, and survival.
  • The traditional view of discrete signaling pathways being affected by specific mutations is an oversimplification of cancer development.

Purpose of the Study:

  • To challenge the simplistic view of cancer development by highlighting the interactive nature of genetic mutations.
  • To emphasize the interconnectedness of oncogenes and tumor suppressors in driving malignant phenotypes.
  • To discuss the implications of these interactions for cancer therapy and the understanding of carcinogenesis.

Main Methods:

  • Review and synthesis of current understanding of cancer genetics and molecular pathways.
  • Analysis of the interplay between oncogenes and tumor suppressor genes.
  • Conceptual framework development for understanding multi-pathway involvement in cancer.

Main Results:

  • Genetic mutations in cancer do not act in isolation but influence multiple, overlapping signaling pathways.
  • Oncogenes and tumor suppressors exhibit interdependence, with their selective advantages being mutually reinforcing.
  • The complexity of genetic interactions within cancer cells is a key feature of the disease.

Conclusions:

  • The interactive nature of genetic alterations is fundamental to cancer development.
  • Understanding these complex interactions is crucial for developing effective, targeted cancer therapies.
  • The stepwise model of carcinogenesis needs to incorporate the interconnectedness of genetic events.

Related Concept Videos

Autocrine Signaling01:01

Autocrine Signaling

Autocrine signaling is one of the many signaling mechanisms that function inside multicellular organisms to carry out intercellular communication. In this type of signaling mechanism, the same cell that secretes an extracellular signaling molecule also expresses the receptors to bind and respond to that signaling molecule.
Autocrine Signaling in Macrophages
Under normal physiological conditions, autocrine signaling is essential for maintaining homeostasis. This process is well characterized in...
Notch Signaling Pathway03:14

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
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...
Notch Signaling Pathway03:14

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...