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Related Experiment Videos

Immunologic characterization of CD7-deficient mice

D M Lee1, H F Staats, J S Sundy

  • 1Department of Medicine, and Duke University Arthritis Center, Duke University Medical Center, Durham, NC 27710, USA.

Journal of Immunology (Baltimore, Md. : 1950)
|June 24, 1998
PubMed
Summary

CD7 deficiency in mice did not cause SCID but led to transient thymocyte increases and altered T cell activity. This suggests CD7 regulates T cell development and CTL function in vivo.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • CD7 is an Ig superfamily molecule on T and NK lymphocytes.
  • In vitro studies suggest CD7's role in lymphoid development and function.
  • In vivo function of CD7 remains largely unknown, with one SCID patient reported.

Purpose of the Study:

  • To investigate the in vivo functions of CD7.
  • To assess lymphoid development and function in CD7-deficient mice.
  • To clarify CD7's role in T cell development and effector function.

Main Methods:

  • Generation of CD7-deficient mice.
  • Assessment of peripheral blood and spleen lymphocyte numbers.
  • Analysis of thymocyte numbers and proliferation responses.

Related Experiment Videos

  • Evaluation of NK cell numbers and cytolytic activity.
  • Measurement of antigen-induced MHC class I-restricted CTL activity.

    • Main Results:

    • CD7-deficient mice were viable with normal peripheral lymphocyte counts.
    • Transient thymocyte number increases were observed at 3 months.
    • Normal NK cell numbers and cytolytic activity were noted.
    • Reduced antigen-induced CTL activity was observed in CD7-deficient mice.
    • No SCID phenotype was observed.

    Conclusions:

    • CD7 plays a role in regulating intrathymic T cell development.
    • CD7 is involved in mediating T cell effector function, specifically CTL activity.
    • CD7 deficiency does not cause SCID but impacts T cell homeostasis and function.