helper T cell

noun

Immunology.

1. a T cell that stimulates B cells to produce antibody against a foreign substance, using lymphokines or direct contact as a signal.

helper T-cell

noun

1. See T-lymphocyte

helper T cell

1. Any of various T cells that, when stimulated by a specific antigen, release lymphokines that promote the activation and function of B cells and killer T cells.

Example Sentences

Nevertheless, we did not find genes for the MHC II isoforms, their assembly and trafficking chaperone Ii and the MHCII-interacting protein CD4, which is essential for helper T-cell activation.

From Nature

In phase I trials, human volunteers responded to vaccination with a strong helper T-cell response while producing detectable levels of antibodies with the capacity to neutralize diverse viral subtypes.

From Nature

The third stage of infection begins when the helper T-cell count drops from an average of 1,000 cells per milliliter of blood to fewer than 500.

From Time Magazine Archive