Integrative analysis of RAS signaling effectors reveals stage-dependent oncogenic patterns in colon adenocarcinoma

Loretta László1,2, Anna Lovrics1, Álmos Tilajka1,2

  • 1Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, Budapest, 1117, Hungary.

Insights

Network Medicine reveals key genes like RAF1, PLCE1, RGL1, RIN1, and GRB7 driving early colon cancer. Targeting these RAS pathway disruptions offers potential for earlier, more effective cancer treatment.

Area of Science:

  • Oncology
  • Systems Biology
  • Genomics

Background:

  • Cancer arises from complex cellular network disruptions, not single gene defects.
  • RAS signaling pathways are crucial mediators in cancer development.
  • Understanding early molecular drivers is key for effective intervention.

Purpose of the Study:

  • To investigate cancer-driving interactions using a Network Medicine approach.
  • To identify stage-specific molecular drivers in colon and lung cancers, focusing on RAS pathways.
  • To discover early-stage colon cancer biomarkers within the RAS signaling network.

Main Methods:

  • Analysis of gene expression patterns in colon and lung cancer tissues.
  • Computational modeling integrated with patient tissue analysis.
  • Network analysis combined with gene expression studies to map RAS signaling disruptions.

Main Results:

  • Five key genes (RAF1, PLCE1, RGL1, RIN1, GRB7) were identified as specifically altered in early-stage colon cancer.
  • These identified genes function as RAS effectors.
  • The identified gene set effectively distinguishes between normal and cancerous colon tissues.

Conclusions:

  • Disruptions in RAS signaling contribute significantly to colon cancer development.
  • Targeting early-stage RAS-related genetic alterations presents potential therapeutic opportunities.
  • Early detection and intervention in RAS pathway changes could prevent cancer progression and complexity.

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...
6.4K
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
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
6.1K
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...
6.5K
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
2.8K
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