A type of T cell involved in protecting against viral, fungal, and protozoal infections. These cells normally orchestrate the immune response, signaling other cells in the immune system to perform their special functions. Also known as T helper cells. HIV's preferred targets. Destruction of CD4+ cells is the major cause of the immunodeficiency observed in AIDS. Lab work is done at specific intervals to measure the number of CD4 cells in circulation.
white blood cells, manufactured in the thymus, which protect the body from bacteria, viruses, and cancer causing agents, while controlling the production of B-cells, which produce antibodies, and unwanted production of potentially harmful T-cells.
Part of the immune system, these cells attack antibodies, foreign substances, in the body. In the bodies of Type 1 Diabetes sufferers they also attack the islets of the pancreas responsible for insulin production.
immunity, and releasing cytokines to help control the production of antibodies to fight infection. T-cells are also called T lymphocytes. Originating in the thymus, they are responsible for Cell-Mediated Immune Responses. Helper T-Cells prime both Antibody-mediated and Cell-mediated effectors for the attack, while Suppressors await the signal to change, slow, or end the assault. Natural Killer Cells (NK) - recognize classes of cells and destroy tumor cells on contact.
Also called T-lymphocytes, T-cells are white blood cells that participate in immune reactions. Three fundamentally different types of T-cells are recognized: helper, killer, and suppressor. They are responsible for finding infected cells.
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