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Updated: May 12, 2026
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Integration of Bioinformatics Approaches and Experimental Validations to Understand the Role of Notch Signaling in Ovarian Cancer
Published on: January 12, 2020
Notch3 functions as a tumor suppressor by controlling cellular senescence.
1Departments of Cell and Developmental Biology and Information Service Research Computing Group, University of Massachusetts Medical School, Worcester, MA 01655, USA .
Cancer Research
|April 24, 2013
Summary
Notch3 protein levels increase during cellular senescence, promoting cell cycle arrest via p21. Reduced Notch3 is linked to cancers, suggesting its role in tumor suppression.
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Notch signaling impacts cell fate and differentiation.
- Notch signaling exhibits both oncogenic and tumor suppressor roles.
- Mechanisms of Notch's tumor suppressor function are not well understood.
Purpose of the Study:
- Investigate the role of Notch3 in senescence.
- Elucidate the tumor suppressor function of Notch3.
- Determine the relationship between Notch3, senescence, and cancer.
Main Methods:
- Analyzed Notch3 expression in senescent cells.
- Manipulated Notch3 levels (downregulation and overexpression).
- Assessed senescence markers (p21) and cell proliferation.
- Examined Notch3 expression in human tumor samples.
Main Results:
- Notch3 expression is upregulated during senescence.
- Notch3 is required for p21 induction and senescence.
- Notch3 downregulation delays senescence; overexpression induces it.
- Notch3 is downregulated in human tumors.
- Restoring Notch3 inhibits tumor cell proliferation and induces senescence.
Conclusions:
- Notch3 acts as a tumor suppressor by inducing senescence.
- Notch3-mediated senescence is dependent on canonical Notch signaling and p21.
- Notch3 represents a novel target for cancer therapy.
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03:14Notch 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...
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...
03:14Notch 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...
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...
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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...
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