CD4+ CD25+ Regulatory T Cells

Definition 1

Regulatory T cells that express CD4 and CD25 (interleukin 2 receptor) antigens, with immunomodulating activity. CD4+CD25+ T regulatory cells (Tregs), a subset of CD4+ T cells expressing high levels of CD25 and the transcription factor Foxp3, are essential in maintaining immunologic homeostasis, preventing autoimmunity by suppressing self-reactive T cells; CD4+CD25+ Tregs may induce tolerance to allogeneic organ transplants such as hematopoetic stem cell transplants (HSCTs). (NCI Thesaurus)

Definition 2

A type of immune cell that blocks the actions of some other types of lymphocytes, to keep the immune system from becoming over-active. T-regulatory cells are being studied in the treatment of cancer. A T-regulatory cell is a type of white blood cell and a type of lymphocyte. (NCI Dictionary)

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