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Wu CL, Caumartin J, Amodio G, Anna F, Loustau M, Gregori S, Langlade-Demoyen P, LeMaoult J. Inhibition of iNKT Cells by the HLA-G-ILT2 Checkpoint and Poor Stimulation by HLA-G-Expressing Tolerogenic DC. Front Immunol 2021; 11:608614. [PMID: 33505397 PMCID: PMC7832389 DOI: 10.3389/fimmu.2020.608614] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/23/2020] [Indexed: 12/25/2022] Open
Abstract
Invariant Natural Killer T (iNKT) cells are a small and distinct population of T cells crucial in immunomodulation. After activation by alpha-GalactosylCeramide (αGC), an exogenic glycolipid antigen, iNKT cells can rapidly release cytokines to enhance specific anti-tumor activity. Several human clinical trials on iNKT cell-based anti-cancer are ongoing, however results are not as striking as in murine models. Given that iNKT-based immunotherapies are dependent mainly on antigen-presenting cells (APC), a human tolerogenic molecule with no murine homolog, such as Human Leucocyte Antigen G (HLA-G), could contribute to this discrepancy. HLA-G is a well-known immune checkpoint molecule involved in fetal-maternal tolerance and in tumor immune escape. HLA-G exerts its immunomodulatory functions through the interaction with immune inhibitory receptors such as ILT2, differentially expressed on immune cell subsets. We hypothesized that HLA-G might inhibit iNKT function directly or by inducing tolerogenic APC leading to iNKT cell anergy, which could impact the results of current clinical trials. Using an ILT2-transduced murine iNKT cell line and human iNKT cells, we demonstrate that iNKT cells are sensitive to HLA-G, which inhibits their cytokine secretion. Furthermore, human HLA-G+ dendritic cells, called DC-10, failed at inducing iNKT cell activation compared to their autologous HLA-G‒ DCs counterparts. Our data show for the first time that the HLA-G/ILT2 ICP is involved in iNKT cell function modulation.
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Affiliation(s)
- Ching-Lien Wu
- CEA, DRF-Francois Jacob Institute, Research Division in Hematology and Immunology (SRHI), Saint-Louis Hospital, Paris, France.,Université de Paris, IRSL, UMRS 976, Paris, France.,Invectys, Paris, France
| | | | - Giada Amodio
- San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | | | | | - Silvia Gregori
- San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), IRCCS San Raffaele Scientific Institute, Milan, Italy
| | | | - Joel LeMaoult
- CEA, DRF-Francois Jacob Institute, Research Division in Hematology and Immunology (SRHI), Saint-Louis Hospital, Paris, France.,Université de Paris, IRSL, UMRS 976, Paris, France
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DeLyria ES, Zhou D, Lee JS, Singh S, Song W, Li F, Sun Q, Lu H, Wu J, Qiao Q, Hu Y, Zhang G, Li C, Sastry KJ, Shen H. Sublingual injection of microparticles containing glycolipid ligands for NKT cells and subunit vaccines induces antibody responses in oral cavity. Carbohydr Res 2015; 405:87-92. [PMID: 25555750 DOI: 10.1016/j.carres.2014.11.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 10/10/2014] [Accepted: 11/14/2014] [Indexed: 12/13/2022]
Abstract
Natural Killer T (NKT) cells are a unique type of innate immune cells which exert paradoxical roles in animal models through producing either Th1 or Th2 cytokines and activating dendritic cells. Alpha-galactosylceramide (αGalCer), a synthetic antigen for NKT cells, was found to be safe and immune stimulatory in cancer and hepatitis patients. We recently developed microparticle-formulated αGalCer, which is selectively presented by dendritic cells and macrophages, but not B cells, and thus can avoid the anergy of NKT cells. In this study, we have examined the immunogenicity of microparticles containing αGalCer and protein vaccine components through sublingual injection in mice. The results showed that sublingual injection of microparticles containing αGalCer and ovalbumin triggered IgG responses in serum (titer >1:100,000), which persisted for more than 3months. Microparticles containing ovalbumin alone also induced comparable level of IgG responses. However, immunoglobulin subclass analysis showed that sublingually injected microparticles containing αGalCer and ovalbumin induced 20 fold higher Th1 biased antibody (IgG2c) than microparticles containing OVA alone (1:20,000 as compared to 1:1000 titer). Sublingual injection of microparticles containing αGalCer and ovalbumin induced secretion of both IgG (titer >1:1000) and IgA (titer=1:80) in saliva secretion, while microparticles containing ovalbumin alone only induced secretion of IgG in saliva. Our results suggest that sublingual injection of microparticles and their subsequent trafficking to draining lymph nodes may induce adaptive immune responses in mucosal compartments. Ongoing studies are focused on the mechanism of antigen presentation and lymphocyte biology in the oral cavity, as well as the toxicity and efficacy of these candidate microparticles for future applications.
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Affiliation(s)
- Elizabeth S DeLyria
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Dapeng Zhou
- Shanghai Pulmonary Hospital, Tongji University, School of Medicine, Shanghai, China.
| | - Jun Soo Lee
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Shailbala Singh
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Wei Song
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States; Shanghai Public Health Clinical Center, Shanghai, China
| | - Fenge Li
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Qing Sun
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Hongzhou Lu
- Shanghai Public Health Clinical Center, Shanghai, China
| | - Jinhui Wu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Qian Qiao
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Yiqiao Hu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Guodong Zhang
- Department of Nanomedicine, The Methodist Hospital Research Institute, Houston, TX, United States
| | - Chun Li
- Department of Experimental Diagnostic Imaging, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - K Jagannadha Sastry
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Haifa Shen
- Department of Nanomedicine, The Methodist Hospital Research Institute, Houston, TX, United States
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Gutowska-Owsiak D, Birchall MA, Moots RJ, Christmas SE, Pazmany L. Expanded population of CD1d-restricted Vα24+ cells in a patient with active rheumatoid arthritis. Clin Immunol 2013; 150:140-2. [PMID: 24412906 DOI: 10.1016/j.clim.2013.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 11/08/2013] [Indexed: 11/25/2022]
Affiliation(s)
- Danuta Gutowska-Owsiak
- Department of Rheumatology, Inflammation Research Unit, School of Clinical Sciences, University of Liverpool, UK.
| | - Martin A Birchall
- Department of Clinical Infection, Microbiology & Immunology Institute of Infection & Global Health, University of Liverpool, UK
| | - Robert J Moots
- Department of Rheumatology, Inflammation Research Unit, School of Clinical Sciences, University of Liverpool, UK
| | - Stephen E Christmas
- Faculty of Brain Sciences, Ear Institute, University College London, London, UK
| | - Laszlo Pazmany
- Department of Rheumatology, Inflammation Research Unit, School of Clinical Sciences, University of Liverpool, UK
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Ru W, Peijie C. Modulation of NKT cells and Th1/Th2 imbalance after alpha-GalCer treatment in progressive load-trained rats. Int J Biol Sci 2009; 5:338-43. [PMID: 19461936 PMCID: PMC2684679 DOI: 10.7150/ijbs.5.338] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2009] [Accepted: 05/03/2009] [Indexed: 11/05/2022] Open
Abstract
Purpose: The purpose of this study was to determine whether α-galactosylceramide (α-GalCer), a synthetic glycolipid agonist of natural killer T (NKT) cells, can ameliorate exercise-induced immune imbalance. Methods: Eight-week-old female Sprague-Dawley rats were trained with a progressively increasing load for 9 weeks. At 36 h and at 7 d after training, groups of rats were euthanized. The whole blood was used to detect hemoglobin(Hb), plasma was analyzed for hormones testosterone(T) and corticosterone(C), and spleen was harvested for detecting NKT cells and interferon-γ (IFN-γ) and interleukin (IL)-4 producing cells. Results: Two-way analysis of variance (ANOVA) showed significant differences between training and time in Series 1. The results showed, at 36h after training, that the decrease in Hb, T and C concentration reflected overtraining or excessive exercise. At 7 d after training, NKT cell populations decreased, and a T helper 1/T helper 2 (Th1/Th2) lymphocyte imbalance occurred. In Series 2, α-galactosylceramide (α-GalCer), an NKT cell activator was found to enhance NKT cell numbers by 69% and shift the Th1/Th2 lymphocyte imbalance by observably decreasing the frequency of IL-4 secreting cells. Conclusion: These data showed that, in addition to Th1/Th2 self-regulation, α-GalCer played an important modulatory role in the exercise-induced Th1/Th2 lymphocyte imbalance, which may be correlative with NKT immunoregulatory cells.
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Affiliation(s)
- Wang Ru
- Department of Sports Medicine, Shanghai University of Sport, Shanghai 200438, China
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