the chief regulatory cell of the immune response.
A functional subclass of T cells which can help to generate cytotoxic T cells and cooperate with B cells in the production of antibody responses. Helper cells recognize antigen in association with Class II MHC molecules.
a type of white blood cell that initiates an immune response when presented with an antigen
Type of white blood cell that is part of the body's immune response. It recognizes foreign antigens and stimulates the production of other cells to control them. Also called inducer T cell or CD4+ T cell.
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
a T lymphocyte that activates macrophages and stimulates B cell proliferation and antibody production
A specialized white blood cell that calls upon other parts of the immune system to fight an infection or foreign material.
A type of T cell that does not directly kill foreign cells, but instead directs and regulates your body's immune responses.
The type of T lymphocyte that orchestrates cellular immunity by direct contact with other immune cells and by releasing chemicals called lymphokines; also helps to mediate the humoral response (see humoral immunity) by interacting with B cells (antibodies). Also known as the CD4 cell or CD4 lymphoctye T4 cell.
lymphocyte bearing the CD4 marker. Helper T cells are the chief regulatory cells of the immune response. They are responsible for many immune system functions, including turning antibody production on and off, and are the main target of HIV infection. (See also CD4+ T lymphocyte.)
A T lymphocyte (which usually expresses CD4) that secretes the various cytokines required for the functional activity of other cells in the immune system.
the specialized white blood cell that tells other parts of the immune system to combat infection or foreign material Back
A type of white blood cell that helps stimulate immune system reactions. Helper T cells help activate cytotoxic T cells and macrophages by secreting cytokines. They also stimulate B cells to make antibodies.