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Medical Dictionary

helper T cell

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noun help·er T cell \ˌhel-pər-ˈtē-\

Medical Definition of helper T cell

  1. :  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 usually carries CD4 molecular markers on its cell surface, and that is reduced to 20 percent or less of normal numbers in AIDS—called also , , ; compare cytotoxic t cell, suppressor t cell




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