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Updated: Aug 8, 2026

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08:18

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Published on: December 31, 2014

Notch-1 expression levels in 3T3-L1 cells influence ras signaling and transformation by oncogenic ras

M J Ruiz-Hidalgo1, C Garcés, J Laborda

  • 1Laboratory of Immunobiology, Division of Monoclonal Antibodies, Center for Biologics Evaluation and Research, U.S. Food and Drug Administration, Rockville, MD 20852, USA.

International Journal of Oncology
|March 24, 1999
PubMed

Insights

Notch-1 downregulation in 3T3-L1 cells alters oncogenic ras signaling, promoting cell transformation instead of adipogenesis. This highlights Notch-1

Area of Science:

  • Cell biology
  • Developmental biology
  • Molecular signaling

Background:

  • Notch proteins are crucial for cell fate specification during development.
  • Previous studies indicated Notch-1 downregulation inhibits 3T3-L1 adipogenesis.
  • Oncogenic Ras can induce adipogenesis in 3T3-L1 cells.

Purpose of the Study:

  • To investigate the role of Notch-1 in oncogenic Ras-induced adipogenesis.
  • To determine if diminished Notch-1 levels affect Ras-mediated cell fate decisions.

Main Methods:

  • Utilized 3T3-L1 cells with enforced Notch-1 downregulation.
  • Introduced oncogenic Ras to these modified cells.
  • Observed cellular response, differentiating between transformation and differentiation.

Main Results:

  • Oncogenic Ras induced cell transformation, not differentiation, in 3T3-L1 cells with reduced Notch-1.
  • This suggests a critical role for Notch-1 in interpreting Ras signaling pathways.

Conclusions:

  • Notch-1 is essential for the proper interpretation of signals that lead to Ras pathway activation.
  • Downregulation of Notch-1 redirects oncogenic Ras from inducing differentiation to promoting transformation.

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