Notch signaling and breast cancer

Michael Reedijk1

  • 1Department of Surgical Oncology, University Health Network, Ontario, Canada. michael.reedijk@uhn.on.ca

Insights

Notch signaling, identified as an oncogene over 20 years ago, is now linked to human breast cancer progression. Aberrant Notch activity influences key cellular processes, impacting patient outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Notch signaling was identified as an oncogene in mouse models over two decades ago.
  • Activated Notch signaling and its target genes are implicated in human breast cancer.
  • High Notch receptor/ligand expression correlates with poor prognosis in breast cancer patients.

Purpose of the Study:

  • To review the role of Notch signaling in breast cancer.
  • To highlight Notch's influence on cellular processes relevant to carcinogenesis.
  • To underscore the link between aberrant Notch activity and breast cancer progression.

Main Methods:

  • Literature review of studies on Notch signaling in breast cancer.
  • Analysis of molecular mechanisms by which Notch affects cellular processes.
  • Correlation of Notch expression levels with clinical outcomes.

Main Results:

  • Notch signaling plays a critical role in stem cell maintenance, cell fate, differentiation, proliferation, motility, and survival.
  • Aberrant Notch activity perturbs these essential cellular functions, contributing to cancer development.
  • Evidence supports Notch's influence on multiple facets of breast cancer progression.

Conclusions:

  • Notch signaling is a significant factor in breast cancer etiology and progression.
  • Targeting Notch pathways may offer therapeutic strategies for breast cancer.
  • Further research is warranted to fully elucidate Notch's complex role in malignancy.

Related Concept Videos

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...
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...
Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

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The mTOR pathway or the...
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...
Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...