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CD4+ but not CD8+ cells are essential for allorejection

N R Krieger1, D P Yin, C G Fathman

  • 1Department of Medicine, Stanford University School of Medicine, California 94305, USA.

The Journal of Experimental Medicine
|November 1, 1996
PubMed
Summary

CD4+ T cells are essential for initiating the immune response that leads to allograft rejection. CD8+ T cells are not required for this initial rejection process in mice.

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Area of Science:

  • Immunology
  • Transplantation Biology
  • Genetics

Background:

  • Knockout mice are crucial for dissecting immune responses.
  • Understanding T cell roles in transplantation is vital for improving outcomes.

Purpose of the Study:

  • To investigate the specific roles of CD4+ and CD8+ T cells in initiating allotransplantation rejection using knockout mouse models.
  • To determine the necessity of CD4+ and CD8+ T cells for the rejection of major histocompatibility complex disparate heart and skin allografts.

Main Methods:

  • Utilized CD4 and CD8 knockout mice.
  • Administered anti-CD4 monoclonal antibody therapy.
  • Transplanted major histocompatibility complex disparate heart and skin allografts.
  • Adoptively transferred CD4+ T cells into CD4 knockout recipients.

Main Results:

  • Depleting CD4+ T cells with antibody therapy led to permanent acceptance of heart allografts, but not skin allografts.
  • CD4 knockout mice permanently accepted both heart and skin allografts.
  • Rejection was restored in CD4 knockout mice upon CD4+ T cell transfer.
  • CD8 knockout mice rejected both heart and skin allografts within 10 days.

Conclusions:

  • CD4+ T cells are indispensable for initiating the rejection of allogeneic transplants.
  • CD8+ T cells are not required for the initiation of allograft rejection.

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