antigen-specific T-cell helper factor — a soluble factor produced by helper T cells that activates other lymphocytes that are specific for the stimulating antigen; it may itself bind antigen … Medical dictionary
helper T cell — noun T cell with CD4 receptor that recognizes antigens on the surface of a virus infected cell and secretes lymphokines that stimulate B cells and killer T cells; helper T cells are infected and killed by the AIDS virus • Syn: ↑helper cell, ↑CD4… … Useful english dictionary
helper T cell — help·er T cell .hel pər tē n a T cell that participates in an immune response by recognizing a foreign antigen and secreting lymphokines to activate T cell and B cell proliferation, that usu. carries CD4 molecular markers on its cell surface, and … Medical dictionary
helper factor — A group of factors apparently produced by helper T lymphocytes that act specifically or nonspecifically to transfer T cell help to other classes of lymphocytes. The existence of specific T cell helper factor is uncertain … Dictionary of molecular biology
helper cells — helper T cells differentiated T lymphocytes whose cooperation (help) is required for the production of antibody against most (T dependent) antigens. Activation of B lymphocytes (B cells) requires recognition of the antigenic determinant against… … Medical dictionary
helper-inducer T cell — n T4 CELL … Medical dictionary
helper T cell — n. a type of T cell that helps coordinate the immune response, especially by activating B cells: the AIDS virus targets and destroys these T cells … English World dictionary
helper T lymphocyte — or helper T cell noun (immunology) A thymus derived lymphocyte which co operates with B lymphocytes to enable them to produce an antibody when stimulated by an antigen • • • Main Entry: ↑help … Useful english dictionary
Cell — The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane. Each cell in the human body there are 100 trillion cells in each of us contains the entire… … Medical dictionary
helper T cell — noun Date: 1974 a T cell that participates in an immune response by recognizing a foreign antigen and secreting lymphokines to activate T cell and B cell proliferation and that usually carries CD4 molecular markers on its cell surface called also … New Collegiate Dictionary
