regulatory T cell

Definition / meaning of regulatory T cell

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

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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