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- W229343228 abstract "Mice were primed in vivo by injection of fetal calf serum (FCS) and their spleen cells were incubated in vitro for 5 days in medium containing 10% FCS. This resulted in the development of cytolytic activity, which was most probably due to T cells, since effector cells 1) were sensitive to anti-Thy 1 antiserum or monoclonal antibodies in the presence of complement, 2) were not retained on Ig-anti Ig columns, 3) did not develop from nude spleen cells. Further arguments for the T cell nature of these effector cells came from their specificity. Blocking experiments using unlabeled competitor cells demonstrated that FCS-induced cytolysis was polyclonal, with clones recognizing allogeneic or syngeneic determinants possibly related to allo or self H-2. In keeping with polyclonality, cytolysis tested on any given target cell was greatly increased by adding Concanavalin A during the cytolysis test. Experiments were made to investigate whether in particular the anti-self cytolytic activity was directed against FCS determinants. We feel that this possibility, although not formally excluded, was made unlikely. The polyclonal specificity at the effector stage stood in sharp contrast to the serum specificity at the induction stage (reported elsewhere). We demonstrated that these two sets of specificities corresponded to two sets of specific cells. A first population of FCS-primed cells had promoter activity, in the sense that it could trigger a second population of precursor cells to differentiate into polyclonally cytolytic T cells." @default.
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- W229343228 date "1979-08-01" @default.
- W229343228 modified "2023-10-18" @default.
- W229343228 title "Xenoserum-Induced Cytolytic «T» Cells: Polyclonal Specificity with an Apparent «Anti-Self» Component, and Cooperative Induction" @default.
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- W229343228 doi "https://doi.org/10.1016/s0340-904x(79)80068-8" @default.
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