Abstract
Natural killer (NK) cells are defined as effector cells with spontaneous cytotoxicity against tumor, virus-infected and undifferentiated normal cells. NK activity is closely associated with a subpopulation of lymphocytes, large granular lymphocytes (LGL), that contain azurophilic cytoplasmic granules. The NK cells show a characteristic organ distribution: they are numerous in peripheral blood and spleen, but relatively low numbers are found in lymph nodes, peritoneal cavity and bone marrow (1,2). Previous investigations have demonstrated that NK activity is influenced by various factors such as interferon, interleukin-2, hormones, suppressor cells, environmental factors and age. Recently, mucosal LGL have been isolated from the small intestines of humans, mice and rats (3–6). In the mouse and rat, mucosal LGL showed moderate levels of NK activity, while human mucosal LGL demonstrated low NK activity.
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© 1987 Plenum Press, New York
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Komiyama, K., Moro, I., Crago, S.S., Mestecky, J. (1987). Inhibition of Natural Killer (NK) Activity by Human Colostral and Serum IgA. In: Mestecky, J., McGhee, J.R., Bienenstock, J., Ogra, P.L. (eds) Recent Advances in Mucosal Immunology. Advances in Experimental Medicine and Biology, vol 216 A. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5344-7_64
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DOI: https://doi.org/10.1007/978-1-4684-5344-7_64
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