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Helper T Cell

Molecular classification: Lymphocyte, T cell, CD4+ cell

Overview

Helper T cells, also known as CD4+ T cells, are a crucial subtype of lymphocytes that play a central role in coordinating adaptive immune responses. They express the CD4 surface protein and recognize antigens presented by antigen-presenting cells via MHC class II molecules. Upon activation, they release cytokines to stimulate B cells, cytotoxic T cells, and other immune cells, tailoring the immune response to specific pathogens. Deficiencies in helper T cell function can lead to severe immunodeficiency syndromes.

Other names: CD4+ T cellT helper cellhelper T lymphocyte

Biological functions

Immune responseActivation of B cellsActivation of cytotoxic T cellsRecruitment of macrophagesCytokine productionAdaptive immunity coordination

Disease associations

ImmunodeficiencyAutoimmune diseasesInfection

Safety considerations

Overstimulation leading to cytokine stormImmunosuppression if depleted or dysfunctional

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