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Notch1 Signaling Regulates the Aggressiveness of Differentiated Thyroid Cancer and Inhibits SERPINE1 Expression

Xiao-Min Yu1, Renata Jaskula-Sztul2, Maria R Georgen2

  • 1Endocrine Surgery Research Laboratories, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. jessica.xm.yu@gmail.com herbchen@uab.edu.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|February 6, 2016
PubMed
Abstract

Insights

Downregulated Notch1 is linked to aggressive differentiated thyroid cancer (DTC) and recurrence. Restoring Notch1 signaling inhibits DTC growth and metastasis, potentially via SERPINE1, suggesting a new therapeutic target.

Area of Science:

  • Endocrinology
  • Oncology
  • Molecular Biology

Background:

  • Notch1 signaling plays a role in cell fate determination and tumorigenesis.
  • Its specific involvement in differentiated thyroid cancer (DTC) behavior requires further elucidation.

Purpose of the Study:

  • To investigate the clinical relevance of Notch1 expression in DTC.
  • To explore the functional role of Notch1 intracellular domain (NICD) in regulating DTC progression.

Main Methods:

  • Examined Notch1 expression in DTC tissues versus normal and benign thyroid tissues.
  • Correlated Notch1 levels with clinicopathologic features and patient outcomes.
  • Utilized in vitro and in vivo gain-of-function assays for NICD.
  • Identified downstream targets of NICD using microarray analysis.

Main Results:

  • Notch1 expression was downregulated in DTC tissues and associated with advanced age and extrathyroidal invasion.
  • Lower Notch1 expression correlated with higher DTC recurrence rates.
  • NICD restoration significantly reduced DTC cell growth, migration, and metastasis in vitro and in vivo.
  • SERPINE1 was identified as a key gene downregulated by NICD, and its knockdown promoted DTC migration.

Conclusions:

  • Notch1 signaling negatively regulates aggressive phenotypes in DTC, potentially through SERPINE1 inhibition.
  • The Notch1/SERPINE1 axis represents a promising therapeutic target for advanced DTC.

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