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Updated: Dec 28, 2025

Integration of Bioinformatics Approaches and Experimental Validations to Understand the Role of Notch Signaling in Ovarian Cancer
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[Knockout notch1 gene can enhanced radiosensitivity of nasopharyngeal carcinoma cells]

L J Shen1, M L Huang1, X P Li2

  • 1Department of Otorhinolaryngology Head and Neck Surgery，People's Hospital of Wuhan University，Wuhan，430060，China.

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi = Journal of Clinical Otorhinolaryngology Head and Neck Surgery
|February 23, 2020
PubMed

Insights

Knocking out the Notch1 gene enhances radiosensitivity in nasopharyngeal carcinoma (NPC) cells. This suggests targeting Notch1 could be a strategy to improve NPC radiotherapy outcomes.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • Nasopharyngeal carcinoma (NPC) is a significant health concern.
  • Understanding factors influencing NPC radiosensitivity is crucial for treatment optimization.
  • The role of Notch1 signaling in NPC radiosensitivity requires further elucidation.

Purpose of the Study:

  • To investigate the impact of Notch1 gene knockout on the radiosensitivity of nasopharyngeal carcinoma cells.
  • To explore the underlying molecular mechanisms by which Notch1 affects radiosensitivity.

Main Methods:

  • Constructed a Notch1-knockout CNE-2 cell line using CRISPR/Cas9.
  • Assessed radiosensitivity via clonogenic assays and calculated survival fraction and sensitivity enhancement ratio.
  • Evaluated cell proliferation (CCK-8), apoptosis (Annexin V-FITC/PI), and protein expression (Western blot for γH2AX, Cyclin-D1, Bax, Bcl-2).

Main Results:

  • Notch1 gene knockout was successfully achieved in CNE-2 cells.
  • Clonogenic assays demonstrated enhanced radiosensitivity in Notch1-knockout NPC cells.
  • Knockout of Notch1 significantly increased apoptosis rates and reduced cell proliferation and viability post-irradiation, with altered expression of key proteins (γH2AX, Cyclin-D1, Bax/Bcl-2 ratio).

Conclusions:

  • Disrupting Notch1 signaling effectively increases the radiosensitivity of nasopharyngeal carcinoma cells in vitro.
  • Notch1 represents a potential therapeutic target for enhancing radiosensitization in NPC treatment.
  • Further research into Notch1's molecular mechanisms could lead to improved NPC radiotherapy strategies.
Keywords:
Cyclin D1Notch1knockoutnasopharyngeal carcinomaradiosensitivityγH2AX

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