Impaired natural killer cell lysis in breast cancer patients with high levels of psychological stress is associated with altered expression of killer immunoglobin-like receptors

被引:35
作者
Varker, Mmberly A.
Terrell, Catherine E.
Welt, Marilyn
Suleiman, Samer
Thornton, Lisa
Andersen, Barbara L.
Carson, William E.
机构
[1] Ohio State Univ, Div Surg Oncol, Ctr Comprehens Canc, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Psychol, Columbus, OH 43210 USA
[3] Ohio State Univ, Inst Behav Med Res, Columbus, OH 43210 USA
[4] Ohio State Univ, Coll Med, Columbus, OH 43210 USA
[5] Ohio State Univ, Dept Surg, Columbus, OH 43210 USA
关键词
breast cancer; killer immunoglobulin-like receptors (KIR); natural killer (NK) cells; psychologic stress;
D O I
10.1016/j.jss.2006.08.037
中图分类号
R61 [外科手术学];
学科分类号
摘要
Background. We previously reported that cancer-related psychological stress is associated with reduced natural killer (NK) cell lysis. We hypothesized that reduced NK cell cytotoxicity in patients with increased levels of stress would correlate with alterations in the expression of inhibitory NK cell receptors (killer immunoglobulin-like receptors, or KIRs). The specific aim of this study was to examine KIR expression in patients with high or low levels of psychologic stress and correlate alterations in KIR expression with NK cell function. Materials and Methods. Two hundred twenty-seven patients underwent baseline evaluation of cancer-related psychological stress and were randomized to psychosocial intervention versus observation. From this population, two groups were defined based on pretreatment measurements of NK lytic activity, stress levels, and the availability of cryopreserved peripheral blood mononuclear cells (PBMC). Group I (n = 9) had low stress by the Impact of Events Scale (IES), and high NK cell lysis at the 50:1 effector: target ratio (NK50 = 52-89%). Group II (n = 8) had high stress and low NK50 (27-52%). Lymphokine activated killer (LAK) activity, antibody dependent cellular cytotoxicity (ADCC), and expression of cytokine receptors, adhesion molecules, and killer immunoglobulin-like receptors (KIRs) were assessed in PBMC. Results. Incubation of PBMC with NK-stimulatory cytokines (IL-2, IL-12, or IL-15) led to significant increases in cytotoxic activity regardless of IES/NK50 scores. There were no significant group differences in NK cell surface expression of the IL-2 receptor components CD25 and CD122, antibody-dependent lysis of HER2/neu-positive SKBr3 cells treated with an anti-HER2/neu monoclonal antibody, expression of adhesion molecules (CD2, CD11a, CD18) and markers of activation (CD69), or expression of the KIRs CD158a, NKG2a, NKB1, and CD161. However, levels of CD158b were significantly higher in Group I after incubation in media alone or with IL-2, and CD94 expression was significantly lower in Group I after incubation with IL-2. Conclusions. In this study of a small subset of breast cancer patients chosen from a previous clinical trial of psychosocial intervention for breast cancer, impaired NK lysis in breast cancer patients with high levels of psychological stress was associated with alterations in surface expression of killer immunoglobulin-like receptors. However, immune effectors retained the ability to lyse antibody-coated targets and to initiate lymphokine-activated killer activity, irrespective of stress levels or baseline NK50. (c) 2007 Elsevier Inc. All rights reserved.
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页码:36 / 44
页数:9
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