Human large granular lymphocytes and natural killing: Ultrastructural studies of strontium‐induced degranulation
- 1 January 1982
- journal article
- research article
- Published by Wiley in European Journal of Immunology
- Vol. 12 (7), 588-595
- https://doi.org/10.1002/eji.1830120711
Abstract
Large granular lymphocytes (LGL) are a subpopulation of human peripheral blood mononuclear cells believed to contain the mediators of spontaneous cytotoxicity or natural killing. In the present study, the mononuclear cells were enriched for LGL by differential density centrifugation on Percoll gradients and examined by transmission electron microscopy. The ultrastructure of LGL and of their binding interaction with natural killer‐susceptible target cells (K562) is described in detail. Some morphological similarity between LGL and cells of a myelocytic origin was observed. Studies reported elsewhere have shown that Sr2+, an alkaline earth ion known to degranulate granulocytes, inhibits NK cell function. Comparison of the morphology of control and Sr2+‐treated LGL showed that Sr2+ caused several characteristic changes in LGL ultrastructure and, indeed, led to their degranulation. The recovery of natural killer function seen following in vitro culture of Sr2+‐treated effector cells was accompanied by the reappearance of typical intracytoplasmic granules. These data strongly suggest that the granules of LGL are required for and, perhaps, involved in natural killer‐mediated cytolysis.This publication has 18 references indexed in Scilit:
- Phospholipid methylation and phospholipase A2 activation in cytotoxicity by human natural killer cells.Proceedings of the National Academy of Sciences, 1981
- Early steps in specific tumor cell lysis by sensitized mouse T lymphocytesCellular Immunology, 1981
- Characteristics of human large granular lymphocytes and relationship to natural killer and K cellsThe Journal of Experimental Medicine, 1981
- The cytotoxic activity of human natural killer cells requires an intact secretory apparatusCellular Immunology, 1981
- Ultrastructure and cytochemistry of human peripheral blood lymphocytes. Similarities between the cells of the third population and TGlymphocytesEuropean Journal of Immunology, 1980
- Mode of regulation of natural killer cell activity by interferonThe Journal of Experimental Medicine, 1980
- Modulation of the rate of histamine release from basophils by cyclic AMPEuropean Journal of Pharmacology, 1980
- Morphological and Functional Characterization of Isolated Effector Cells Responsible for Human Natural Killer Activity to Fetal Fibroblasts and to Cultured Cell Line TargetsImmunological Reviews, 1979
- A rapid method for the isolation of functional thymus‐derived murine lymphocytesEuropean Journal of Immunology, 1973
- ORIGIN OF GRANULES IN POLYMORPHONUCLEAR LEUKOCYTESThe Journal of cell biology, 1966