Abstract
Thymocytes stimulated in vitro in a mixed culture was sorbed by centrifugation on the surface of target cells for electron microscope study of cytology of immune T-lymphocytes and early cytolysis periods. A well developed Golgi apparatus was revealed in the cytoplasm of lymphocytes; there was also accumulation of tubular structures 50 to 60 nm in diameter which communicated with the cysterns of the granular endoplasmic reticulum, with "descended" vesiculi and plasmatic membrane of lymphocyte. This membrane formed numerous contacts with the membrane of target cells thus producing closed clefts. Taking into consideration these data and also current views on the intertransformation of membranes and intracellular transport a hypothetic scheme of the mechanism involved in the cytolysis of the target cell by immune T-lymphocyte was put forward.
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