Calcineurin-dependent lytic granule exocytosis in NK-92 natural killer cells.
Calcineurin-dependent lytic granule exocytosis in NK-92 natural killer cells.
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DOI:
10.1016/j.cellimm.2008.07.004
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发表时间:
2009
影响因子:
4.3
通讯作者:
Zweifach, Adam
中科院分区:
文献类型:
--
作者:
Pores-Fernando, Arun T.;Gaur, Surabhi;Doyon, Michelle Y.;Zweifach, Adam
Cytotoxic T cells (CTLs) and natural killer cells (NKs) both kill virus-infected cells and tumor cells by releasing the cytoxic contents of their lytic granules. We recently demonstrated a role for calcineurin in lytic granule exocytosis in TALL-104 human leukemic CTLs. However, whether calcineurin plays a similar role in NK lytic granule release is not known. We tested whether calcineurin is involved in lytic granule exocytosis in human leukemic NK-92 cells using immunosuppressive drugs that block calcineurin function and by overexpressing a constitutively active calcineurin fusion protein. Our results indicate that calcineurin does play a role in lytic granule exocytosis in NK-92 cells, and suggest that, as was the case in TALL-104 cells, there are likely to be multiple calcium-dependent steps.
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