A History of Cancer Research: The RAS Pathway

Joseph Lipsick1

  • 1Departments of Pathology, Genetics, and Biology, Stanford University, Stanford, California 94305-5324, USA lipsick@stanford.edu.

Insights

The RAS oncogene drives cancer by disrupting cell proliferation pathways. Discoveries trace its history from viral origins to its GTP-GDP exchange mechanism and MAP kinase signaling.

Area of Science:

  • Oncogene research
  • Molecular biology
  • Cancer genetics

Background:

  • The RAS oncogene is a key factor in numerous cancers.
  • RAS GTPase connects growth factor receptors to cell proliferation pathways.
  • Activating RAS mutations lead to uncontrolled cell growth and tumor progression.

Purpose of the Study:

  • To provide a historical overview of RAS oncogene discovery.
  • To elucidate the mechanism of action of RAS.
  • To highlight key research milestones in understanding RAS signaling.

Main Methods:

  • Historical review of scientific literature.
  • Biochemical studies on GTP-GDP exchange.
  • Characterization of downstream signaling pathways, including MAP kinase cascades.

Main Results:

  • The discovery of RAS from rat sarcoma viruses.
  • Elucidation of RAS's role as a GTPase.
  • Identification of GTP-GDP exchange as a critical regulatory step.
  • Characterization of MAP kinase cascades as downstream effectors.

Conclusions:

  • RAS oncogenes are fundamental to cancer development.
  • Understanding RAS function is crucial for cancer research.
  • Continued research into RAS pathways offers therapeutic potential.

Related Concept Videos

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...
6.5K
Small GTPases - Ras and Rho01:24

Small GTPases - Ras and Rho

Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
4.2K
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...
3.9K
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.6K
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
5.4K
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...
9.2K