natural killer cell

(redirected from NK cells)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.
Related to NK cells: T cells, MHC, Macrophages

natural killer cell

[¦nach·rəl ′kil·ər ‚sel]
(histology)
A large, granular lymphocyte that can lyse a variety of target cells when it is activated by interferon. Abbreviated NK.
References in periodicals archive ?
The objective of this project is to elucidate presynaptic signalling cascades leading to NK cell exocytosis, and thus obtain a detailed map of the sub-cellular events leading to granule release.
Potential of alternative adoptive immunotherapies with NK cells, TILs, CTLs and DLIs
The CD107a degranulation assay was performed with media, extract or Erucin-treated purified NK cells (2x[l0.
Evidence has emerged that has shown that in addition to eliminating transformed cells, NK cells are involved in many other biological processes such as immune regulation, antimicrobial immune responses, and the recognition and elimination of senescent cells .
The researchers also identified a cell adhesion protein called LFA-1 that helps NK cells bind to red blood cells.
The latest research published in The Journal of Clinical Endocrinology & Metabolism, suggests that NK cells are an indicator of something serious happening in the womb lining that stops implantation.
NK cells account for less than 15% of white blood cells, but play a major role in defending against cancer and viral infections.
Immunophenotyping of lymphocyte subsets showed a significantly elevated absolute and percentage counts of CD19+, CD 4+ and NK cells in the septic group in comparison to the other non septic, while total lymphocytic count, CD3+ and CD8 + were not significantly different.
The immune system has classically been divided into two compartments: (i) adaptive immune responses (T- and B-cells), which provide long-lived immunity to specific antigens, and are boosted through specific re-exposure to antigen, and (ii) innate immune responses (dendritic cells, phagocytes, natural killer cells), which are first to act upon exposure to a foreign antigen, and have been considered as 'nonspecific' and lacking the potential for memory of prior antigenic exposures (these features have been challenged by recent findings of NK cells in mouse models (13)).
Upon further characterization, the atypical lymphoid infiltrate was positive for CD3, CD56, TIA-1, and granzyme-B, characteristic of NK cells or activated T lymphocytes, and was negative for CD57 (Figure 2).
cells in CB was similar to that in MPB and APB, and the level of inhibitory KIR receptors in NK cells was higher in venous CB than in MPB and APB.