natural killer cell

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natural killer cell

A large granular lymphocyte that kills virus-infected, cancerous, or abnormal cells without first having been exposed to specific antigens and that also produces a variety of cytokines. Also called NK cell.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

nat′ural kill′er cell`

a small killer cell that destroys virus-infected cells or tumor cells without activation by an immune system cell or antibody. Compare killer T cell.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
This natural killer cell interacts with the CD94/ NKG2A receptor, part of a system believed to have been in place in humans for more than 90 million years.
When elderly subjects took 100 mg of Cistanche extract daily for 12 weeks, there was a 6.1% increase in helper T cells and an almost 12% increase in natural killer cell activity.
Urbani et al., "Effectiveness of donor natural killer cell alloreactivity in mismatched hematopoietic transplants," Science, vol.
Rajagopalan, "Controlling natural killer cell responses: integration of signals for activation and inhibition," Annual Review of Immunology, vol.
Mantovani et al., "Impaired intrahepatic natural killer cell cytotoxic function in chronic hepatitis C virus infection," Hepatology (Baltimore, Md), vol.
Zhu, "Flow cytometric immunophenotyping is of great value to diagnosis of natural killer cell neoplasms involving bone marrow and peripheral blood," Annals of Hematology, vol.
Blocking the natural killer cell inhibitory receptor NKG2A increases activity of human natural killer cells and clears hepatitis B virus infection in mice.
Aggressive natural killer cell leukemia: report of a Chinese series and review of the literature.
Doctors were struggling to give her a cause before she heard about a problem some women have with "natural killer cells".
Niiro et al., "Interaction between Toll-like receptors and natural killer cells in the destruction of bile ducts in primary biliary cirrhosis," Hepatology, vol.
Knowledge of carbohydrate consumption does not alter natural killer cell activity following an acute bout of high-intensity aerobic exercise.

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