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NOTCH1 acts as a tumor suppressor that induces early differentiation in head and neck cancer

Chenfei Huang1,2, Shhyam Moorthy3,4, Qiuli Li3,5

  • 1Bobby R. Alford Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Houston, Texas, USA.

JCI Insight
|April 16, 2026
PubMed

Insights

NOTCH1 acts as a tumor suppressor in head and neck squamous cell carcinoma (HNSCC), reducing cancer stem cell frequency and improving prognosis. This clarifies its role, regardless of mutation status, aiding personalized therapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • NOTCH1's role in head and neck squamous cell carcinoma (HNSCC) is debated, with conflicting reports on its tumor suppressor versus oncogenic functions.
  • Previous studies suggested NOTCH1 inactivation indicates tumor suppressor activity, but some research indicates NOTCH1 signaling drives HNSCC growth and a cancer stem cell (CSC) phenotype.

Purpose of the Study:

  • To definitively establish the role of NOTCH1 in HNSCC, irrespective of its mutation or activation status.
  • To reconcile conflicting data regarding NOTCH1's function in HNSCC and its impact on cancer stem cells.
  • To elucidate the biological and clinical significance of NOTCH1 in HNSCC for improved prognosis and personalized treatment strategies.

Main Methods:

  • Comprehensive experimental validation of NOTCH1's function in HNSCC.
  • Development of a NOTCH1 activation signature.
  • Analysis of the association between NOTCH1 activation, tumor differentiation, microenvironment, and patient prognosis.

Main Results:

  • NOTCH1 unequivocally functions as a tumor suppressor in HNSCC.
  • NOTCH1 activation reduces the frequency of cancer stem cells (CSCs).
  • The NOTCH1 activation signature correlates with early differentiation, an altered tumor microenvironment, and a better patient prognosis.

Conclusions:

  • NOTCH1 is confirmed as a tumor suppressor in HNSCC, regardless of mutation or activation status.
  • Understanding NOTCH1's role is critical for accurate prognosis and the development of personalized therapies in HNSCC.
  • These findings have broader implications for other squamous cell carcinomas with NOTCH1 mutations.
Keywords:
Cell biologyHead and neck cancerOncologyStem CellsTumor suppressors

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