RE: have a read of this Crumbs7 Feb 2019 17:22
60% now goes to 99% sure
CD25+CD4+ Tregs potently suppress proliferation of other CD4+ and CD8+ T cells when Treg and responder populations are """"""""""co-cultured and stimulated with specific antigen"""""""""""""" or a polyclonal TCR stimulator (such as anti-CD3 mAb) in the presence of antigen-presenting cells (APCs). CD25+CD4+ Tregs also suppress cytokine production (especially IL-2 production) by CD4+ and CD8+ responder T cells and their effector activities such as CD8+ T cell cytotoxicity.