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Rico LG, Ward MD, Bradford JA, Petriz J. A Novel Flow Cytometric Method to Study Cytotoxic Activity in Whole Blood Samples. Cytometry A 2020; 99:503-510. [PMID: 32910503 DOI: 10.1002/cyto.a.24226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/04/2020] [Accepted: 08/20/2020] [Indexed: 11/09/2022]
Abstract
For several decades, cell-mediated cytotoxicity has been measured using the 51 Cr release assay. This assay, however, has several drawbacks and flow cytometry has been used as an alternative to measure cytotoxic activity. Here, we present a quantitative method for cell-mediated cytotoxicity studies, preserving cellular function with minimal sample manipulation. Cytotoxic activity is simply and reproducibly measured as the ability of cytotoxic cells to lyse K562 target cells previously loaded with Calcein-AM vital stain. After spiking a known number of fluorescent viable K562 target cells into whole blood, cell mixtures are incubated for 2 h in a cell incubator and the remaining spiked cells are counted by flow cytometry. In order to discriminate nucleated cells, erythrocytes, and debris, unlysed whole blood is stained with a cell permeable DNA vital fluorescent dye. Cell-mediated lysis is measured by comparing target counts for different effector-to-target ratios. Since the cytotoxicity of these dyes is relatively low, this method can be broadly applied to studies of innate immune response to tumors and infections, especially where target-killing activity might be compromised by small volume samples or low frequency of cytotoxic cells. © 2020 International Society for Advancement of Cytometry.
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Affiliation(s)
- Laura G Rico
- Josep Carreras Leukaemia Research Institute (IJC), Campus ICO-Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Badalona (Barcelona), Catalonia, Spain
| | | | | | - Jordi Petriz
- Josep Carreras Leukaemia Research Institute (IJC), Campus ICO-Germans Trias i Pujol, Universitat Autònoma de Barcelona (UAB), Badalona (Barcelona), Catalonia, Spain
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Zhang J, Wang Y, Wu L, Wang J, Tang R, Li S, Chen J, Gao Z, Pei R, Wang Z. Application of an improved flow cytometry-based NK cell activity assay in adult hemophagocytic lymphohistiocytosis. Int J Hematol 2017; 105:828-834. [PMID: 28185204 DOI: 10.1007/s12185-017-2195-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 02/01/2017] [Accepted: 02/01/2017] [Indexed: 02/01/2023]
Abstract
Low or absent natural killer (NK) cell activity is included as one of the HLH-2004 diagnostic criteria. To improve the diagnosis of HLH, we aimed to establish a rapid and reliable NK cell activity assay that avoids the use of radioactivity. The K562 cell line, as standard NK target cells, was engineered to stably express enhanced green fluorescent protein (EGFP), which can be quantified by flow cytometry. The EGFP-flow cytometry method for measuring NK cell activity was improved by double staining of early and late apoptotic target cells. Whole-blood samples from healthy volunteers were assessed with this method, which demonstrated that optimal conditions were effector-target ratio of 10:1 and incubation time of 4 h. This method was further evaluated for samples from 113 HLH patients and 64 healthy volunteers. Mean NK cell activity in either primary or secondary HLH patients was significantly lower (P < 0.001) than in healthy individuals (20.23 ± 4.12%). Furthermore, primary HLH patients (10.76 ± 2.54%) exhibited even lower (P < 0.001) NK cell activity compared with secondary HLH patients (15.01 ± 3.62%). We have optimized and implemented this method in clinically relevant samples.
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Affiliation(s)
- Jia Zhang
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Yini Wang
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Lin Wu
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Jingshi Wang
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Ran Tang
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Shuo Li
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Jianhang Chen
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Zhuo Gao
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Ruijun Pei
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China
| | - Zhao Wang
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Xicheng District, Beijing, 10050, China.
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Collin A, Noacco A, Talvas J, Caldefie-Chézet F, Vasson MP, Farges MC. Enhancement of Lytic Activity by Leptin Is Independent From Lipid Rafts in Murine Primary Splenocytes. J Cell Physiol 2016; 232:101-9. [PMID: 27028718 DOI: 10.1002/jcp.25394] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 03/25/2016] [Indexed: 12/13/2022]
Abstract
Leptin, a pleiotropic adipokine, is known as a regulator of food intake, but it is also involved in inflammation, immunity, cell proliferation, and survival. Leptin receptor is integrated inside cholesterol-rich microdomains called lipid rafts, which, if disrupted or destroyed, could lead to a perturbation of lytic mechanism. Previous studies also reported that leptin could induce membrane remodeling. In this context, we studied the effect of membrane remodeling in lytic activity modulation induced by leptin. Thus, primary mouse splenocytes were incubated with methyl-β-cyclodextrin (β-MCD), a lipid rafts disrupting agent, cholesterol, a major component of cell membranes, or ursodeoxycholic acid (UDCA), a membrane stabilizer agent for 1 h. These treatments were followed by splenocyte incubation with leptin (absence, 10 and 100 ng/ml). Unlike β-MCD or cholesterol, UDCA was able to block leptin lytic induction. This result suggests that leptin increased the lytic activity of primary spleen cells against syngenic EO771 mammary cancer cells independently from lipid rafts but may involve membrane fluidity. Furthermore, natural killer cells were shown to be involved in the splenocyte lytic activity. To our knowledge it is the first publication in primary culture that provides the link between leptin lytic modulation and membrane remodeling. J. Cell. Physiol. 232: 101-109, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Aurore Collin
- Clermont Université, Université d'Auvergne, UFR Pharmacie, UMR 1019, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, Clermont-Ferrand, France. .,INRA, UMR 1019, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France.
| | - Audrey Noacco
- Clermont Université, Université d'Auvergne, UFR Pharmacie, UMR 1019, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, Clermont-Ferrand, France.,INRA, UMR 1019, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France
| | - Jérémie Talvas
- Clermont Université, Université d'Auvergne, UFR Pharmacie, UMR 1019, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, Clermont-Ferrand, France.,INRA, UMR 1019, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France
| | - Florence Caldefie-Chézet
- Clermont Université, Université d'Auvergne, UFR Pharmacie, UMR 1019, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, Clermont-Ferrand, France.,INRA, UMR 1019, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France
| | - Marie-Paule Vasson
- Clermont Université, Université d'Auvergne, UFR Pharmacie, UMR 1019, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, Clermont-Ferrand, France.,INRA, UMR 1019, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France.,Centre Jean-Perrin, CHU Gabriel-Montpied, Unité de Nutrition, Clermont-Ferrand, France
| | - Marie-Chantal Farges
- Clermont Université, Université d'Auvergne, UFR Pharmacie, UMR 1019, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, Clermont-Ferrand, France.,INRA, UMR 1019, Unité de Nutrition Humaine, CRNH Auvergne, Clermont-Ferrand, France
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Talvas J, Garrait G, Goncalves-Mendes N, Rouanet J, Vergnaud-Gauduchon J, Kwiatkowski F, Bachmann P, Bouteloup C, Bienvenu J, Vasson MP. Immunonutrition stimulates immune functions and antioxidant defense capacities of leukocytes in radiochemotherapy-treated head & neck and esophageal cancer patients: A double-blind randomized clinical trial. Clin Nutr 2014; 34:810-7. [PMID: 25575640 DOI: 10.1016/j.clnu.2014.12.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/13/2014] [Accepted: 12/03/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND Immunonutrition has been reported to improve the immune status of perioperative cancer patients, thereby reducing complications and length of hospital stay. AIM This study aimed to assess whether immunonutrition enriched in arginine, EPA & DHA and nucleotides could impact the immune cells responses in head & neck and esophageal cancer patients treated by radiochemotherapy (RCT). METHODS A double-blind clinical trial was carried out in 28 patients randomized into two groups, receiving either an immunomodulating enteral nutrition formula (IEN, n = 13, Impact(®), Nestlé) or an isoenergetic isonitrogenous standard enteral nutrition formula (SEN, n = 15) throughout RCT (5-7 weeks). After isolation from whole blood, immune cells metabolism and functions were assessed at the beginning (Db) and at the end (De) of RCT. RESULTS Immunonutrition maintained CD4(+)/CD8(+) T-lymphocyte counts ratio and CD3 membrane expression between Db and De. Polymorphonuclear cells CD62L and CD15 densities and ROS production were increased in IEN patients. Peripheral blood mononuclear cells (PBMC) production of pro-inflammatory prostaglandin-E2 was stable in IEN patients and lower than in SEN patients at De. Genes coding for immune receptors, antioxidant enzymes and NADPH oxidase subunits were overexpressed in the PBMC of IEN vs SEN patients at De. CONCLUSION Immunonutrition can enhance immune cell responses through the modulation of their phenotypes and functions. By modulating the gene expression of immune cells, immunonutrition could make it easier for the organism to adapt to the systemic inflammation and oxidative stress induced by RCT. CLINICAL TRIAL REGISTRATION This clinical trial has been registered on ClinicalTrial.gov website: NCT00333099.
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Affiliation(s)
- J Talvas
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
| | - G Garrait
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
| | - N Goncalves-Mendes
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
| | - J Rouanet
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
| | - J Vergnaud-Gauduchon
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
| | - F Kwiatkowski
- Centre Jean Perrin, Service de Statistiques, F-63000 Clermont-Ferrand, France
| | - P Bachmann
- Centre Léon Bérard, Unité de Nutrition Clinique, F-69000 Lyon, France
| | - C Bouteloup
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Service de Médecine Digestive et Hépatobiliaire, F-63003 Clermont-Ferrand, France
| | - J Bienvenu
- CH Lyon Sud, Laboratoire d'Immunologie, F-69000 Lyon, France
| | - M-P Vasson
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France; INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France; Centre Jean Perrin, CHU Clermont-Ferrand, Unité de Nutrition, CLARA, F-63000 Clermont-Ferrand, France.
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Monitoring immune modulation by nutrition in the general population: identifying and substantiating effects on human health. Br J Nutr 2013; 110 Suppl 2:S1-30. [PMID: 23228631 PMCID: PMC3734536 DOI: 10.1017/s0007114513001505] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Optimal functioning of the immune system is crucial to human health, and nutrition is one of the major exogenous factors modulating different aspects of immune function. Currently, no single marker is available to predict the effect of a dietary intervention on different aspects of immune function. To provide further guidance on the assessment and interpretation of the modulation of immune functions due to nutrition in the general population, International Life Sciences Institute Europe commissioned a group of experts from academia, government and the food industry to prepare a guidance document. A draft of this paper was refined at a workshop involving additional experts. First, the expert group defined criteria to evaluate the usefulness of immune function markers. Over seventy-five markers were scored within the context of three distinct immune system functions: defence against pathogens; avoidance or mitigation of allergy; control of low-grade (metabolic) inflammation. The most useful markers were subsequently classified depending on whether they by themselves signify clinical relevance and/or involvement of immune function. Next, five theoretical scenarios were drafted describing potential changes in the values of markers compared with a relevant reference range. Finally, all elements were combined, providing a framework to aid the design and interpretation of studies assessing the effects of nutrition on immune function. This stepwise approach offers a clear rationale for selecting markers for future trials and provides a framework for the interpretation of outcomes. A similar stepwise approach may also be useful to rationalise the selection and interpretation of markers for other physiological processes critical to the maintenance of health and well-being.
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Lamas B, Nachat‐Kappes R, Goncalves‐Mendes N, Mishellany F, Rossary A, Vasson M, Farges M. Dietary fat without body weight gain increases in vivo MCF‐7 human breast cancer cell growth and decreases natural killer cell cytotoxicity. Mol Carcinog 2013; 54:58-71. [DOI: 10.1002/mc.22074] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 06/22/2013] [Accepted: 07/02/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Bruno Lamas
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, CRNH AuvergneINRA, UMR 1019Clermont‐FerrandFrance
| | - Rachida Nachat‐Kappes
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, CRNH AuvergneINRA, UMR 1019Clermont‐FerrandFrance
| | - Nicolas Goncalves‐Mendes
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, CRNH AuvergneINRA, UMR 1019Clermont‐FerrandFrance
| | - Florence Mishellany
- EA 4677 ERTICa, Service d'Anatomopathologie, Centre de Lutte Contre le Cancer Jean PerrinClermont‐FerrandFrance
| | - Adrien Rossary
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, CRNH AuvergneINRA, UMR 1019Clermont‐FerrandFrance
| | - Marie‐Paule Vasson
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, CRNH AuvergneINRA, UMR 1019Clermont‐FerrandFrance
- Centre de Lutte Contre le Cancer Jean PerrinUnité de NutritionClermont‐FerrandFrance
- CHU Clermont‐Ferrand, Unité de NutritionClermont‐FerrandFrance
| | - Marie‐Chantal Farges
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Equipe ECREIN, CLARA, CRNH AuvergneINRA, UMR 1019Clermont‐FerrandFrance
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Perche O, Vergnaud-Gauduchon J, Morand C, Dubray C, Mazur A, Vasson MP. Orange juice and its major polyphenol hesperidin consumption do not induce immunomodulation in healthy well-nourished humans. Clin Nutr 2013; 33:130-5. [PMID: 23602614 DOI: 10.1016/j.clnu.2013.03.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 03/19/2013] [Accepted: 03/19/2013] [Indexed: 01/30/2023]
Abstract
BACKGROUND & AIMS Polyphenols exert a variety of biological properties, including antioxidant, immunomodulatory and antigenotoxic effects. In a randomized crossover study in healthy men, we investigated the effects of orange juice and its major polyphenolic compound hesperidin on a panel of immune cell functions, including cytokine secretion by leukocytes, lytic activity of NK cells, and the Reactive Oxygen Species (ROS) burst by polymorphonuclear neutrophil cells (PMN). METHODS The protocol design was divided into three 4-week treatment periods separated by 3-week wash-out intervals, for total study duration of 18 weeks. During treatment periods, volunteers (n = 24) consumed daily 500 mL of orange juice, or an isocaloric control beverage with hesperidin (292 mg in a capsule), or of the same control beverage with a placebo. RESULTS Whatever the intake was, no variations were recorded on leukocyte subset distributions (PMN, B and T lymphocytes, NK cells and monocytes), ROS production by stimulated PMNs, lytic activity of NK cells or cytokine production capacity of leukocytes in well-nourished healthy volunteers. CONCLUSIONS We show that consumption within the usual daily intake range of orange juice and its major polyphenol hesperidin do not induce immunomodulation of cell immune function in healthy well-nourished humans.
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Affiliation(s)
- Olivier Perche
- Clermont Université, Université d'Auvergne, UMR 1019, Unité de Nutrition Humaine, CRNH-Auvergne, CLARA, BP 10448, F-63000 Clermont-Ferrand, France
| | - Juliette Vergnaud-Gauduchon
- Clermont Université, Université d'Auvergne, UMR 1019, Unité de Nutrition Humaine, CRNH-Auvergne, CLARA, BP 10448, F-63000 Clermont-Ferrand, France
| | - Christine Morand
- Centre de recherche INRA, UMR 1019 INRA Université d'Auvergne, Unité de Nutrition Humaine, Clermont-Ferrand Theix, France
| | - Claude Dubray
- CHU Clermont-Ferrand, Centre de Pharmacologie Clinique, Inserm, CIC 501, Univ Clermont 1, Faculté de Médecine, F-63001 Clermont-Ferrand, France
| | - Andrzej Mazur
- Centre de recherche INRA, UMR 1019 INRA Université d'Auvergne, Unité de Nutrition Humaine, Clermont-Ferrand Theix, France
| | - Marie-Paule Vasson
- Centre anticancéreux Jean-Perrin, CHU, Unité de Nutrition, CLARA, F-63000 Clermont-Ferrand, France.
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Curriu M, Carrillo J, Massanella M, Rigau J, Alegre J, Puig J, Garcia-Quintana AM, Castro-Marrero J, Negredo E, Clotet B, Cabrera C, Blanco J. Screening NK-, B- and T-cell phenotype and function in patients suffering from Chronic Fatigue Syndrome. J Transl Med 2013; 11:68. [PMID: 23514202 PMCID: PMC3614537 DOI: 10.1186/1479-5876-11-68] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 03/14/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Chronic Fatigue Syndrome (CFS) is a debilitating neuro-immune disorder of unknown etiology diagnosed by an array of clinical manifestations. Although several immunological abnormalities have been described in CFS, their heterogeneity has limited diagnostic applicability. METHODS Immunological features of CFS were screened in 22 CFS diagnosed individuals fulfilling Fukuda criteria and 30 control healthy individuals. Peripheral blood T, B and NK cell function and phenotype were analyzed by flow cytometry in both groups. RESULTS CFS diagnosed individuals showed similar absolute numbers of T, B and NK cells, with minor differences in the percentage of CD4+ and CD8+ T cells. B cells showed similar subset frequencies and proliferative responses between groups. Conversely, significant differences were observed in T cell subsets. CFS individuals showed increased levels of T regulatory cells (CD25+/FOXP3+) CD4 T cells, and lower proliferative responses in vitro and in vivo. Moreover, CD8 T cells from the CFS group showed significantly lower activation and frequency of effector memory cells. No clear signs of T-cell immunosenescence were observed. NK cells from CFS individuals displayed higher expression of NKp46 and CD69 but lower expression of CD25 in all NK subsets defined. Overall, T cell and NK cell features clearly clustered CFS individuals. CONCLUSIONS Our findings suggest that alterations in T-cell phenotype and proliferative response along with the specific signature of NK cell phenotype may be useful to identify CFS individuals. The striking down modulation of T cell mediated immunity may help to understand intercurrent viral infections in CFS.
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Affiliation(s)
- Marta Curriu
- Institut de recerca de la sida, IrsiCaixa-HIVACAT, Institut d'Investigació en Ciències de la Salut Germans Trias I Pujol
- , Badalona, Spain
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Lamas B, Goncalves-Mendes N, Nachat-Kappes R, Rossary A, Caldefie-Chezet F, Vasson MP, Farges MC. Leptin modulates dose-dependently the metabolic and cytolytic activities of NK-92 cells. J Cell Physiol 2013; 228:1202-9. [DOI: 10.1002/jcp.24273] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 10/19/2012] [Indexed: 11/07/2022]
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Lamas B, Vergnaud-Gauduchon J, Goncalves-Mendes N, Perche O, Rossary A, Vasson MP, Farges MC. Altered functions of natural killer cells in response to L-Arginine availability. Cell Immunol 2012; 280:182-90. [PMID: 23399839 DOI: 10.1016/j.cellimm.2012.11.018] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 10/03/2012] [Accepted: 11/29/2012] [Indexed: 01/09/2023]
Abstract
L-Arginine (L-Arg) availability is crucial in the regulation of immune response. Indeed, L-Arg deficiency induces T-cell dysfunction and could modulate the properties of natural killer (NK) cells involved in the early host defense against infections and tumors. We explored the impact of L-Arg depletion on NK cell functions using two models - an NK-92 cell line and isolated human blood NK cells. Below 5mg/L of L-Arg, NK-92 cell proliferation was decreased and a total L-Arg depletion reduced NK-92 cell viability. NK cell cytotoxicity was significantly inhibited in presence of low L-Arg concentration (2.5 mg/L). L-Arg depletion reduced the expression of NK-92 activating receptors, NKp46 and NKp30, the expression of NK ζ chain and the NK-92 intracellular production of IFN-γ. Whatever the L-Arg concentrations tested, no significant variation in the gene expression of transporters and enzymes involved in L-Arg metabolism was found. Thus, L-Arg availability modulates the phenotypic and functional properties of NK cells.
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Affiliation(s)
- Bruno Lamas
- Clermont Université, Université d'Auvergne, EA 4233, Nutrition Cancerogenèse et Thérapie anti-tumorale, CLARA, CRNH Auvergne, Clermont-Ferrand, France.
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Jimenez-Perez MI, Jave-Suarez LF, Ortiz-Lazareno PC, Bravo-Cuellar A, Gonzalez-Ramella O, Aguilar-Lemarroy A, Hernandez-Flores G, Pereira-Suarez AL, Daneri-Navarro A, del Toro-Arreola S. Cervical cancer cell lines expressing NKG2D-ligands are able to down-modulate the NKG2D receptor on NKL cells with functional implications. BMC Immunol 2012; 13:7. [PMID: 22316211 PMCID: PMC3364150 DOI: 10.1186/1471-2172-13-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 02/08/2012] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Cervical cancer represents the third most commonly diagnosed cancer and the fourth leading cause of cancer-related deaths in women worldwide. Natural killer (NK) cells play an important role in the defense against viruses, intracellular bacteria and tumors. NKG2D, an activating receptor on NK cells, recognizes MHC class I chain-related molecules, such as MICA/B and members of the ULBP/RAET1 family. Tumor-derived soluble NKG2D-ligands have been shown to down-modulate the expression of NKG2D on NK cells. In addition to the down-modulation induced by soluble NKG2D-ligands, it has recently been described that persistent cell-cell contact can also down-modulate NKG2D expression. The goal of this study was to determine whether the NKG2D receptor is down-modulated by cell-cell contact with cervical cancer cells and whether this down-modulation might be associated with changes in NK cell activity. RESULTS We demonstrate that NKG2D expressed on NKL cells is down-modulated by direct cell contact with cervical cancer cell lines HeLa, SiHa, and C33A, but not with non-tumorigenic keratinocytes (HaCaT). Moreover, this down-modulation had functional implications. We found expression of NKG2D-ligands in all cervical cancer cell lines, but the patterns of ligand distribution were different in each cell line. Cervical cancer cell lines co-cultured with NKL cells or fresh NK cells induced a marked diminution of NKG2D expression on NKL cells. Additionally, the cytotoxic activity of NKL cells against K562 targets was compromised after co-culture with HeLa and SiHa cells, while co-culture with C33A increased the cytotoxic activity of the NKL cells. CONCLUSIONS Our results suggest that differential expression of NKG2D-ligands in cervical cancer cell lines might be associated with the down-modulation of NKG2D, as well as with changes in the cytotoxic activity of NKL cells after cell-cell contact with the tumor cells.
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Affiliation(s)
- Miriam I Jimenez-Perez
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
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Teodori L, Bushnell T, Campanella L, Tárnok A. GFP: from humble beginnings to Nobel winnings--the color that changed cytometry. Cytometry A 2009; 73A:1109-10. [PMID: 18985727 DOI: 10.1002/cyto.a.20673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Laura Teodori
- BAS-BIOTECMED, Italian Agency for New Technology, Energy and the Environment, Rome, Italy
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