CD4-positive helper T cell helper T cell T follicular helper cell 2009-10-29T04:01:27Z follicular T cell follicular helper T-cell T(FH) follicular B helper T cell A CD4-positive, CXCR5-positive, CCR7-negative alpha-beta T cell located in follicles of secondary lymph nodes that is BCL6-high, ICOS-high and PD1-high, and stimulates follicular B cells to undergo class-switching and antibody production. follicular helper T cell follicular T-cell follicular T-helper cell Tfh CD4-positive exhausted alpha-beta T cell