| Abstract: | Lethally irradiated (900 rads), bone-marrow-protected rabbits were given allogeneic thymocytes intravenously. Autoradiography by means of local splenic infusion of (H3) thymidine revealed progeny of two differentiated T-cell lines. Electron microscopy confirmed these observations in detail. An analogy with cellular immunity reactions in an "isolated T-cell system", performed in draining lymph nodes after a variety of antigenic stimuli is presented. The functional properties of these T-blasts and their lymphoid descendants are discussed. |
