Medical Definition of T helper cell

1. A subset of lymphocytes that secrete various cytokines that regulate the immune response. They are T lymphocytes specifically involved in the differentiation of B lymphocytes into antibody secreting cells. Loss of T helper cells, is seen in patients with HIV infection, and this produces immunosuppression. macrophages attract T helper cells and present an antigen onto which the T helper cell binds. The T helper cell is then activated and produces and secretes potent lymphokine hormones that stimulate B-cell production of antibodies, signals natural killer or cytotoxic T-cells, and attracts more macrophages. There are subsets of T helper cells: TH1 helping with {cellular} immunity and TH2 with humoural {immunity}. (08 Aug 2003)

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Lexicographical Neighbors of T Helper Cell

T Tauri star
T agglutinogen
T antigen
T antigens
T cell
T cells
T cytotoxic cells
T enzyme
T even phage
T fibre
T group
T helper cell
T hinge
T loop of RNA
T lymphocyte
T myelotomy
T perm
T perms
T suppressor cell
T system
T tube
T wave
Ta'izzi-Adeni Arabic

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