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Maeng HG, Lee SJ, Lee YA, Lee HJ, Kim YJ, Lee JK, Kim JC, Choi J. Hemacytotoxicity and natural killer lytic index: New parameters to evaluate natural killer cell immunity for clinical use in cancer. Oncol Lett 2017; 15:1325-1333. [PMID: 29391904 DOI: 10.3892/ol.2017.7365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 06/09/2017] [Indexed: 12/20/2022] Open
Abstract
Cytotoxicity assays with patient peripheral blood mononuclear cell (PBMC)-derived natural killer (NK) cells are useful in evaluating the innate immunity of patients with cancer. However, the size of the NK cell population in PBMC preparations may have significant effects on the assay outcome. Therefore, the present study examined the effect of NK cell frequency in a cytotoxicity system to investigate NK cell immunity in post-surgical colorectal cancer patients. For this, hemacytotoxicity was assessed using PBMC preparations, and lymphocyte subset populations were analyzed in samples obtained from 47 patients and 45 healthy volunteers. In addition, a new theoretical parameter, the 'NK lytic index', was termed to represent the per-cell cytotoxicity and compensate for the NK cell frequency effect during PBMC preparations. Notably, the patterns of hemacytotoxicity and NK lytic index did not coincide in follow-up studies with consecutive patients following surgical intervention. In addition, it was determined that NK cell NKG2D expression influences NK lytic index, but not hemacytotoxicity. Transforming growth factor (TGF)-β-bound lymphocytes influenced hemacytotoxicity and NK lytic index. These findings indicate that total cell activity (hemacytotoxicity) is not a sum of per-cell activities (NK lytic indexes), suggesting that clinicians should employ NK lytic index in addition to hemacytotoxicity in order to precisely determine how to enhance NK cell immunity in patients with cancer, either focusing on recovering the number of NK cells or boosting NK cell activity in single cell levels, or both.
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Affiliation(s)
- Hyung Gun Maeng
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Su Jin Lee
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Yun A Lee
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Hye Jeong Lee
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Young Joo Kim
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Jong Kyun Lee
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea.,Department of Surgery, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Jae Cheol Kim
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea.,Department of Surgery, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
| | - Joungbum Choi
- Immunology Laboratory, Holon Center, Seoul Song Do Colorectal Hospital, Seoul 04597, Republic of Korea
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Zhang R, Shah MV, Loughran TP. The root of many evils: indolent large granular lymphocyte leukaemia and associated disorders. Hematol Oncol 2010; 28:105-17. [PMID: 19645074 PMCID: PMC4377226 DOI: 10.1002/hon.917] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Large granular lymphocytes (LGL) leukaemia can arise from either natural killer (NK) cells or cytotoxic T lymphocytes (CTL). The T-cell form of LGL leukaemia has significant overlap with other haematological disorders and autoimmune diseases. Here we provide an overview of LGL biology. We also focus discussion on the indolent LGL leukaemia related disorders and their causal relationships. We then discuss the potential relationships and distinctions between indolent LGL leukaemia and non-malignant clonal lymphocyte expansion that occur in otherwise healthy individuals, especially elder people.
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Affiliation(s)
- Ranran Zhang
- Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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