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Related Experiment Videos

Normal peripheral T-cell function in c-Fos-deficient mice

J Jain1, E A Nalefski, P G McCaffrey

  • 1Division of Tumor Virology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115.

Molecular and Cellular Biology
|March 1, 1994
PubMed
Summary
This summary is machine-generated.

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Transcription factors Fos and Jun are crucial for T-cell activation and cytokine production. However, c-Fos is not essential for T-cell development or function, as other Fos family members can compensate.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cellular Biology

Background:

  • Fos and Jun transcription factors are rapidly induced in T cells upon T-cell receptor (TCR) stimulation.
  • These factors regulate the transcription of key cytokines, such as interleukin-2 (IL-2), in activated T cells.
  • T-cell development, including positive and negative selection of thymocytes, also relies on TCR signaling, suggesting a potential role for Fos and Jun.

Purpose of the Study:

  • To investigate the role of Fos and Jun transcription factors, specifically c-Fos, in T-cell development and function.
  • To determine if c-Fos is essential for T-cell receptor-mediated activation, cytokine production, and thymocyte development.

Main Methods:

  • Utilized targeted mutagenesis to create c-Fos-deficient mice.

Related Experiment Videos

  • Analyzed thymocyte development patterns in c-Fos-deficient and wild-type mice.
  • Assessed the proliferation and cytokine production of peripheral T cells from c-Fos-deficient mice in response to TCR stimulation.

    • Main Results:

    • c-Fos, along with other Fos family members, is present in inducible AP-1 and NFAT complexes in activated murine T cells.
    • c-Fos-deficient mice exhibited normal thymocyte development compared to wild-type controls.
    • Peripheral T cells from c-Fos-deficient mice showed comparable proliferation and cytokine production upon TCR stimulation.

    Conclusions:

    • c-Fos is not absolutely required for the development or function of peripheral T cells.
    • Other members of the Fos family can functionally substitute for c-Fos in T-cell development and cytokine gene transcription.
    • These findings highlight functional redundancy within the Fos family in T-cell biology.