Cytokine-induced killer cells hunt individual cancer cells in droves in a mouse model

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• 作者：Ji Sung Kim ; Yong Guk Kim ; Hong Kyung Lee ; Eun Jae Park…
• 关键词：Cytotoxicity ; Natural killer cells ; Threshold number ; Time ; lapse imaging
• 刊名：Cancer Immunology, Immunotherapy
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：66
• 期：2
• 页码：193-202
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Oncology; Immunology; Cancer Research;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0851
• 卷排序：66

文摘

Cytotoxicity of cytokine-induced killer (CIK) cells depends mainly on their encounters with target cells, but how many CIK cells are required to kill an individual cancer cell is unknown. Here we used time-lapse imaging to quantify the critical effector cell number required to kill an individual target cell. CIK cells killed MHC-I-negative and MHC-I-positive cancer cells, but natural killer (NK) cells destroyed MHC-I-negative cells only. The average threshold number of CIK cells required to kill an individual cancer cell was 6.7 for MHC-I-negative cells and 6.9 for MHC-I-positive cells. That of NK cells was 2.4 for MHC-I-negative cells. Likely due to the higher threshold numbers, killing by CIK cells was delayed in comparison with NK cells: 40% of MHC-negative target cells were killed after 5 h when co-cultured with CIK cells and after 2 h with NK cells. Our data have implications for the rational design of CIK cell-based immunotherapy of cancer patients.