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Yip T, Lee S, Stockis J, Garcia C, Raghunathan S, Lim B, Pinaud S, Png S, Halim T. Abstract 2341: Group 2 innate lymphoid cells influence pancreatic stromal cell composition in homeostasis and pancreatic cancer. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-2341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
Background: Group 2 Innate Lymphoid Cells (ILC2s) are tissue-resident innate immune cells critical in orchestrating type-2 immune responses. Cancer-associated fibroblasts are increasingly recognized as having important pro- and anti-tumorigenic roles. While type-2 immunity has been linked to fibrosis and tumor development, how ILC2s influence the stromal microenvironment in these settings is poorly understood. Here, we investigated the role of ILC2s on pancreatic stromal cell (PSC) behavior in healthy and tumor-bearing mice.
Methods: Naive, inflamed, and tumor-bearing pancreata of WT or ILC2-deficient mice were profiled by flow cytometry, histology, or multiplex immunofluorescence imaging. We assessed two-way communication between ILC2s and stromal cells using in silico analysis of single-cell RNAseq or in vitro coculture transcriptomic data. Putative crosstalk mechanisms were tested with in vitro and in vivo assays. Additionally, we performed two-photon microscopy of reporter mice pancreata and multiplex immunofluorescent imaging of tumor sections.
Results: Imaging studies show that ILC2s co-localize with IL-33+ stromal cells in the naïve, inflamed and tumor-bearing pancreas. In vivo and in vitro studies indicate that ILC2s are critical mediators of stromal cell proliferation and density in homeostatic and inflamed conditions, while influencing stromal cell-driven immune modulation in cancer. Single-cell transcriptomic analysis reveal distinct Il33+ and Il33- stromal cell clusters, which may engage in different crosstalk mechanisms with ILC2s, as determined by in silico inferential analysis, in vitro co-culture and in vivo studies.
Conclusion: ILC2s strongly influence stromal cell composition in both the healthy pancreas and pancreatic tumors. Given the importance attributed to the characteristic desmoplasia of pancreatic tumors, ILC2-driven modulation of the stromal compartment may affect tumor progression.
Citation Format: Thomas Yip, Sheng Lee, Julie Stockis, Celine Garcia, Shwetha Raghunathan, Bram Lim, Silvain Pinaud, Shaun Png, Timotheus Halim. Group 2 innate lymphoid cells influence pancreatic stromal cell composition in homeostasis and pancreatic cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 2341.
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Affiliation(s)
- Thomas Yip
- 1University of Cambridge, Cambridge, United Kingdom
| | - Sheng Lee
- 1University of Cambridge, Cambridge, United Kingdom
| | | | | | | | - Bram Lim
- 1University of Cambridge, Cambridge, United Kingdom
| | | | - Shaun Png
- 1University of Cambridge, Cambridge, United Kingdom
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2
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Gaignage M, Zhang X, Stockis J, Dedobbeleer O, Michiels C, Cochez P, Dumoutier L, Coulie PG, Lucas S. Blocking GARP-mediated activation of TGF-β1 did not alter innate or adaptive immune responses to bacterial infection or protein immunization in mice. Cancer Immunol Immunother 2022; 71:1851-1862. [PMID: 34973084 PMCID: PMC9294018 DOI: 10.1007/s00262-021-03119-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 11/22/2021] [Indexed: 12/22/2022]
Abstract
Abstract Transmembrane protein GARP binds latent TGF-β1 to form GARP:(latent)TGF-β1 complexes on the surface of several cell types including Tregs, B-cells, and platelets. Upon stimulation, these cells release active TGF-β1. Blocking TGF-β1 activation by Tregs with anti-GARP:TGF-β1 mAbs overcomes resistance to PD1/PD-L1 blockade and induces immune-mediated regressions of murine tumors, indicating that Treg-derived TGF-β1 inhibits anti-tumor immunity. TGF-β1 exerts a vast array of effects on immune responses. For example, it favors differentiation of TH17 cells and B-cell switch to IgA production, two important processes for mucosal immunity. Here, we sought to determine whether treatment with anti-GARP:TGF-β1 mAbs would perturb immune responses to intestinal bacterial infection. We observed no aggravation of intestinal disease, no systemic dissemination, and no alteration of innate or adaptative immune responses upon oral gavage of C. rodentium in highly susceptible Il22r−/− mice treated with anti-GARP:TGF-β1 mAbs. To examine the effects of GARP:TGF-β1 blockade on Ig production, we compared B cell- and TH cell- responses to OVA or CTB protein immunization in mice carrying deletions of Garp in Tregs, B cells, or platelets. No alteration of adaptive immune responses to protein immunization was observed in the absence of GARP on any of these cells. Altogether, we show that antibody-mediated blockade of GARP:TGF-β1 or genetic deletion of Garp in Tregs, B cells or platelets, do not alter innate or adaptive immune responses to intestinal bacterial infection or protein immunization in mice. Anti-GARP:TGF-β1 mAbs, currently tested for cancer immunotherapy, may thus restore anti-tumor immunity without severely impairing other immune defenses. Précis Immunotherapy with GARP:TGF-β1 mAbs may restore anti-tumor immunity without impairing immune or inflammatory responses required to maintain homeostasis or host defense against infection, notably at mucosal barriers. Supplementary Information The online version contains supplementary material available at 10.1007/s00262-021-03119-8.
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Affiliation(s)
- Mélanie Gaignage
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Xuhao Zhang
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Julie Stockis
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Olivier Dedobbeleer
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Camille Michiels
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Perrine Cochez
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Laure Dumoutier
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
| | - Pierre G Coulie
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium
- Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wavre, Belgium
| | - Sophie Lucas
- de Duve Institute, Université Catholique de Louvain, avenue Hippocrate 74, B1.74.04, 1200, Brussels, Belgium.
- Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wavre, Belgium.
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3
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Halim TYF, Schuijs M, Png S, Richard A, Tsyben A, Hamm G, Stockis J, Garcia C, Pinaud S, Nichols A, Romero-Ros X, Shields J, Cohen ES, McKenzie A, Goodwin R, Su J, Eldridge M, Riedel A, Serrao E, Brindle K, Marioni J. ILC2-driven innate immune checkpoint mechanism antagonizes NK cell anti-metastatic function in the lung. The Journal of Immunology 2021. [DOI: 10.4049/jimmunol.206.supp.57.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Abstract
Metastasis constitutes the primary cause of cancer-related deaths, with the lung being a commonly affected organ. We found that activation of lung-resident group 2 innate lymphoid cells (ILC2s) orchestrated suppression of natural killer (NK) cell-mediated innate antitumor immunity, leading to increased lung metastases and mortality. Using multiple models of lung metastasis, we show that interleukin (IL)-33-dependent ILC2 activation in the lung is involved centrally in promoting tumor burden. ILC2-driven innate type 2 inflammation is accompanied by profound local suppression of interferon-γ production and cytotoxic function of lung NK cells. ILC2-dependent suppression of NK cells is elaborated via an innate regulatory mechanism, which is reliant on IL-5-induced lung eosinophilia, ultimately limiting the metabolic fitness of NK cells. Single-cell and bulk transcriptomic analysis of lung NK cells reveals that post-transcriptional regulation likely accounts for IL-33-ILC2 dependent suppression of NK cell function. Using mass-spectrometry imaging (MSI) of the lungs of 13 C-Glucose infused mice, and metabolite profiling of ex vivo lung cultures, we find that IL-33 drives localized depletion of glucose via ILC2-dependent recruitment of highly glycolytic eosinophils, which can directly suppress lung NK cell function. Therapeutic targeting of IL-33 or IL-5 reversed NK cell suppression and alleviated cancer burden. Thus, we reveal an important function of IL-33 and ILC2s in promoting tumor metastasis via their capacity to suppress innate type 1 immunity.
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Affiliation(s)
| | - Martijn Schuijs
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Shaun Png
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Arianne Richard
- 2Cambridge Inst. for Med. Res., Univ. of Cambridge, UK, United Kingdom
| | - Anastasia Tsyben
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Gregory Hamm
- 3Imaging and Data Analytics, Clin. Pharmacology and Safety Sci., BioPharmaceuticals R&D, AstraZeneca, United Kingdom
| | - Julie Stockis
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Celine Garcia
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Silvain Pinaud
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Ashley Nichols
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Xavier Romero-Ros
- 4Biosci. Asthma, Res. and Early Develop., Resp. & Immunology, BioPharmaceuticals R&D, AstraZeneca, United Kingdom
| | | | - E. Suzanne Cohen
- 4Biosci. Asthma, Res. and Early Develop., Resp. & Immunology, BioPharmaceuticals R&D, AstraZeneca, United Kingdom
| | | | - Richard Goodwin
- 3Imaging and Data Analytics, Clin. Pharmacology and Safety Sci., BioPharmaceuticals R&D, AstraZeneca, United Kingdom
| | - Jing Su
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Matthew Eldridge
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Angela Riedel
- 5MRC Cancer Unit, Univ. of Cambridge, United Kingdom
| | - Eva Serrao
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
| | - Kevin Brindle
- 7Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, United Kingdom, United Kingdom
| | - John Marioni
- 1Cancer Res. UK - Cambridge Inst., Univ. of Cambridge, UK, United Kingdom
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4
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Bach K, Pensa S, Zarocsinceva M, Kania K, Stockis J, Pinaud S, Lazarus KA, Shehata M, Simões BM, Greenhalgh AR, Howell SJ, Clarke RB, Caldas C, Halim TYF, Marioni JC, Khaled WT. Time-resolved single-cell analysis of Brca1 associated mammary tumourigenesis reveals aberrant differentiation of luminal progenitors. Nat Commun 2021; 12:1502. [PMID: 33686070 PMCID: PMC7940427 DOI: 10.1038/s41467-021-21783-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/11/2021] [Indexed: 12/13/2022] Open
Abstract
It is unclear how genetic aberrations impact the state of nascent tumour cells and their microenvironment. BRCA1 driven triple negative breast cancer (TNBC) has been shown to arise from luminal progenitors yet little is known about how BRCA1 loss-of-function (LOF) and concomitant mutations affect the luminal progenitor cell state. Here we demonstrate how time-resolved single-cell profiling of genetically engineered mouse models before tumour formation can address this challenge. We found that perturbing Brca1/p53 in luminal progenitors induces aberrant alveolar differentiation pre-malignancy accompanied by pro-tumourigenic changes in the immune compartment. Unlike alveolar differentiation during gestation, this process is cell autonomous and characterised by the dysregulation of transcription factors driving alveologenesis. Based on our data we propose a model where Brca1/p53 LOF inadvertently promotes a differentiation program hardwired in luminal progenitors, highlighting the deterministic role of the cell-of-origin and offering a potential explanation for the tissue specificity of BRCA1 tumours.
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Affiliation(s)
- Karsten Bach
- University of Cambridge, Department of Pharmacology, Cambridge, UK
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
- Cancer Research UK, Cambridge Cancer Centre, Cambridge, UK
| | - Sara Pensa
- University of Cambridge, Department of Pharmacology, Cambridge, UK
- Cancer Research UK, Cambridge Cancer Centre, Cambridge, UK
| | - Marija Zarocsinceva
- Cancer Research UK, Cambridge Cancer Centre, Cambridge, UK
- Wellcome-MRC Cambridge Stem Cell Institute, Cambridge, UK
| | - Katarzyna Kania
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - Julie Stockis
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - Silvain Pinaud
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - Kyren A Lazarus
- University of Cambridge, Department of Pharmacology, Cambridge, UK
- Cancer Research UK, Cambridge Cancer Centre, Cambridge, UK
| | - Mona Shehata
- Medical Research Council Cancer Unit, University of Cambridge, Cambridge, UK
| | - Bruno M Simões
- Manchester Breast Centre, Oglesby Cancer Research Building, University of Manchester, Manchester, UK
| | - Alice R Greenhalgh
- Manchester Breast Centre, Oglesby Cancer Research Building, University of Manchester, Manchester, UK
| | - Sacha J Howell
- Manchester Breast Centre, Oglesby Cancer Research Building, University of Manchester, Manchester, UK
- Department of Medical Oncology, Christie NHS Foundation Trust, Manchester, UK
| | - Robert B Clarke
- Manchester Breast Centre, Oglesby Cancer Research Building, University of Manchester, Manchester, UK
| | - Carlos Caldas
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
- Cancer Research UK, Cambridge Cancer Centre, Cambridge, UK
| | - Timotheus Y F Halim
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - John C Marioni
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK.
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK.
- European Bioinformatics Institute, European Molecular Biology Laboratory, Hinxton, UK.
| | - Walid T Khaled
- University of Cambridge, Department of Pharmacology, Cambridge, UK.
- Cancer Research UK, Cambridge Cancer Centre, Cambridge, UK.
- Wellcome-MRC Cambridge Stem Cell Institute, Cambridge, UK.
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5
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Schuijs MJ, Png S, Richard AC, Tsyben A, Hamm G, Stockis J, Garcia C, Pinaud S, Nicholls A, Ros XR, Su J, Eldridge MD, Riedel A, Serrao EM, Rodewald HR, Mack M, Shields JD, Cohen ES, McKenzie ANJ, Goodwin RJA, Brindle KM, Marioni JC, Halim TYF. ILC2-driven innate immune checkpoint mechanism antagonizes NK cell antimetastatic function in the lung. Nat Immunol 2020; 21:998-1009. [PMID: 32747815 PMCID: PMC7116357 DOI: 10.1038/s41590-020-0745-y] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 06/23/2020] [Indexed: 12/23/2022]
Abstract
Metastasis constitutes the primary cause of cancer-related deaths, with the lung being a commonly affected organ. We found that activation of lung-resident group 2 innate lymphoid cells (ILC2s) orchestrated suppression of natural killer (NK) cell-mediated innate antitumor immunity, leading to increased lung metastases and mortality. Using multiple models of lung metastasis, we show that interleukin (IL)-33-dependent ILC2 activation in the lung is involved centrally in promoting tumor burden. ILC2-driven innate type 2 inflammation is accompanied by profound local suppression of interferon-γ production and cytotoxic function of lung NK cells. ILC2-dependent suppression of NK cells is elaborated via an innate regulatory mechanism, which is reliant on IL-5-induced lung eosinophilia, ultimately limiting the metabolic fitness of NK cells. Therapeutic targeting of IL-33 or IL-5 reversed NK cell suppression and alleviated cancer burden. Thus, we reveal an important function of IL-33 and ILC2s in promoting tumor metastasis via their capacity to suppress innate type 1 immunity.
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Affiliation(s)
| | - Shaun Png
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Arianne C Richard
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
| | - Anastasia Tsyben
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
- Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Gregory Hamm
- Imaging and Data Analytics, Clinical Pharmacology and Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | - Julie Stockis
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Celine Garcia
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Silvain Pinaud
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Ashley Nicholls
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Xavier Romero Ros
- Bioscience Asthma, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | - Jing Su
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | | | - Angela Riedel
- MRC Cancer Unit, University of Cambridge, Cambridge, UK
| | - Eva M Serrao
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Hans-Reimer Rodewald
- Division of Cellular Immunology, German Cancer Research Center, Heidelberg, Germany
| | - Matthias Mack
- Department of Internal Medicine, University Hospital Regensburg, Regensburg, Germany
| | | | - E Suzanne Cohen
- Bioscience Asthma, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | | | - Richard J A Goodwin
- Imaging and Data Analytics, Clinical Pharmacology and Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Kevin M Brindle
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - John C Marioni
- CRUK Cambridge Institute, University of Cambridge, Cambridge, UK
- EMBL-European Bioinformatics Institute, Wellcome Genome Campus, Cambridge, UK
- Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK
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6
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Abstract
The inflammatory response to transformed cells forms the cornerstone of natural or therapeutically induced protective immunity to cancer. Regulatory T (Treg) cells are known for their critical role in suppressing inflammation, and therefore can antagonize effective anti-cancer immune responses. As such, Treg cells can play detrimental roles in tumour progression and in the response to both conventional and immune-based cancer therapies. Recent advances in our understanding of Treg cells reveal complex niche-specific regulatory programmes and functions, which are likely to extrapolate to cancer. The regulation of Treg cells is reliant on upstream cues from haematopoietic and non-immune cells, which dictates their genetic, epigenetic and downstream functional programmes. In this review we will discuss how Treg cells are themselves regulated in normal and transformed tissues, and the implications of this cross talk on tumour growth.
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Affiliation(s)
- Julie Stockis
- CRUK Cambridge InstituteUniversity of CambridgeCambridgeUK
| | - Rahul Roychoudhuri
- Laboratory of Lymphocyte Signalling and DevelopmentThe Babraham InstituteCambridgeUK
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7
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Liénart S, Merceron R, Vanderaa C, Lambert F, Colau D, Stockis J, van der Woning B, De Haard H, Saunders M, Coulie PG, Savvides SN, Lucas S. Structural basis of latent TGF-β1 presentation and activation by GARP on human regulatory T cells. Science 2018; 362:952-956. [DOI: 10.1126/science.aau2909] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 10/10/2018] [Indexed: 12/13/2022]
Abstract
Transforming growth factor–β1 (TGF-β1) is one of very few cytokines produced in a latent form, requiring activation to exert any of its vastly diverse effects on development, immunity, and cancer. Regulatory T cells (Tregs) suppress immune cells within close proximity by activating latent TGF-β1 presented by GARP (glycoprotein A repetitions predominant) to integrin αVβ8 on their surface. We solved the crystal structure of GARP:latent TGF-β1 bound to an antibody that stabilizes the complex and blocks release of active TGF-β1. This finding reveals how GARP exploits an unusual medley of interactions, including fold complementation by the amino terminus of TGF-β1, to chaperone and orient the cytokine for binding and activation by αVβ8. Thus, this work further elucidates the mechanism of antibody-mediated blockade of TGF-β1 activation and immunosuppression by Tregs.
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8
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Abstract
TGF-β1, 2 and 3 cytokines are involved in many cellular processes including cell proliferation, differentiation, migration and survival. Whereas TGF-β2 and 3 play important roles in embryonic development, TGF-β1 is mostly implicated in controlling immune responses after birth. The production of TGF-β1 is a tightly regulated process, occurring mostly at a post-translational level. Virtually all cells produce the latent, inactive form of TGF-β1. In latent TGF-β1, the mature TGF-β1 dimer is non-covalently associated to the Latency Associated Peptide, or LAP, which prevents binding to the TGF-β1 receptor. Activation of the cytokine implies release of mature TGF-β1 from LAP. Only a few cell types activate latent TGF-β1, via mechanisms that are cell type specific. Proteins such as integrins, proteases and thrombospondin-1 activate TGF-β1 in epithelial cells, fibroblasts and dendritic cells. More recently, the protein GARP was shown to be involved in TGF-β1 activation by regulatory T cells (Treg), a subset of CD4+ T lymphocytes specialized in suppression of immune responses. GARP is a transmembrane protein that binds latent-TGF-β1 and tethers it on the Treg surface. The role of GARP was studied mostly in Tregs, and this was recently reviewed in L. Sun, H. Jin and H. Li, Oncotarget, 2016, 7, 42826-42836. However, GARP is also expressed in non-immune cells. This review focuses on the roles of GARP in latent TGF-β1 activation by immune and non-immune cells.
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Affiliation(s)
- Julie Stockis
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium.
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9
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Dedobbeleer O, Stockis J, van der Woning B, Coulie PG, Lucas S. Cutting Edge: Active TGF-β1 Released from GARP/TGF-β1 Complexes on the Surface of Stimulated Human B Lymphocytes Increases Class-Switch Recombination and Production of IgA. J Immunol 2017; 199:391-396. [PMID: 28607112 DOI: 10.4049/jimmunol.1601882] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 05/10/2017] [Indexed: 11/19/2022]
Abstract
Production of active TGF-β is regulated at a posttranslational level and implies release of the mature cytokine dimer from the inactive, latent TGF-β precursor. There are several cell-type specific mechanisms of TGF-β activation. We identified a new mechanism operating on the surface of human regulatory T cells and involving membrane protein GARP, which binds latent TGF-β1. The paracrine activity of regulatory T cell-derived TGF-β1 contributes to immunosuppression and can be inhibited with anti-GARP Abs. Whether other immune cell types use surface GARP to activate latent TGF-β1 was not known. We show in this study that stimulated, human B lymphocytes produce active TGF-β1 from surface GARP/latent TGF-β1 complexes with isotype switching to IgA production.
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Affiliation(s)
- Olivier Dedobbeleer
- de Duve Institute, B1200 Brussels, Belgium.,Faculty of Medicine, Catholic University of Louvain, 1348 Louvain-la-Neuve, Belgium.,Walloon Excellence in Lifesciences and Biotechnology, 1300 Wavre, Belgium; and
| | - Julie Stockis
- de Duve Institute, B1200 Brussels, Belgium.,Faculty of Medicine, Catholic University of Louvain, 1348 Louvain-la-Neuve, Belgium.,Walloon Excellence in Lifesciences and Biotechnology, 1300 Wavre, Belgium; and
| | | | - Pierre G Coulie
- de Duve Institute, B1200 Brussels, Belgium.,Faculty of Medicine, Catholic University of Louvain, 1348 Louvain-la-Neuve, Belgium.,Walloon Excellence in Lifesciences and Biotechnology, 1300 Wavre, Belgium; and
| | - Sophie Lucas
- de Duve Institute, B1200 Brussels, Belgium; .,Faculty of Medicine, Catholic University of Louvain, 1348 Louvain-la-Neuve, Belgium.,Walloon Excellence in Lifesciences and Biotechnology, 1300 Wavre, Belgium; and
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10
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Liénart S, Stockis J, Dedobbeleer O, Lucas S. Targeting immunosuppression by Tregs with monoclonal antibodies against GARP. Oncoimmunology 2016; 5:e1074379. [PMID: 27141368 DOI: 10.1080/2162402x.2015.1074379] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 07/14/2015] [Accepted: 07/15/2015] [Indexed: 10/22/2022] Open
Abstract
Reducing Treg function in cancer patients should augment antitumor immune responses. We recently uncovered a mechanism of immunosuppression by human Tregs that implies transmembrane protein GARP and production of active TGF-ß1. We obtained monoclonal antibodies that block this process and could thus serve as a novel approach for cancer immunotherapy.
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Affiliation(s)
- Stéphanie Liénart
- de Duve Institute, Université catholique de Louvain , Brussels, Belgium
| | - Julie Stockis
- de Duve Institute, Université catholique de Louvain , Brussels, Belgium
| | | | - Sophie Lucas
- de Duve Institute, Université catholique de Louvain , Brussels, Belgium
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11
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Cuende J, Liénart S, Dedobbeleer O, van der Woning B, De Boeck G, Stockis J, Huygens C, Colau D, Somja J, Delvenne P, Hannon M, Baron F, Dumoutier L, Renauld JC, De Haard H, Saunders M, Coulie PG, Lucas S. Monoclonal antibodies against GARP/TGF-β1 complexes inhibit the immunosuppressive activity of human regulatory T cells in vivo. Sci Transl Med 2016; 7:284ra56. [PMID: 25904740 DOI: 10.1126/scitranslmed.aaa1983] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Regulatory T cells (Tregs) are essential to prevent autoimmunity, but excessive Treg function contributes to cancer progression by inhibiting antitumor immune responses. Tregs exert contact-dependent inhibition of immune cells through the production of active transforming growth factor-β1 (TGF-β1). On the Treg cell surface, TGF-β1 is in an inactive form bound to membrane protein GARP and then activated by an unknown mechanism. We demonstrate that GARP is involved in this activation mechanism. Two anti-GARP monoclonal antibodies were generated that block the production of active TGF-β1 by human Tregs. These antibodies recognize a conformational epitope that requires amino acids GARP137-139 within GARP/TGF-β1 complexes. A variety of antibodies recognizing other GARP epitopes did not block active TGF-β1 production by Tregs. In a model of xenogeneic graft-versus-host disease in NSG mice, the blocking antibodies inhibited the immunosuppressive activity of human Tregs. These antibodies may serve as therapeutic tools to boost immune responses to infection or cancer via a mechanism of action distinct from that of currently available immunomodulatory antibodies. Used alone or in combination with tumor vaccines or antibodies targeting the CTLA4 or PD1/PD-L1 pathways, blocking anti-GARP antibodies may improve the efficiency of cancer immunotherapy.
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Affiliation(s)
- Julia Cuende
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium
| | - Stéphanie Liénart
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium
| | - Olivier Dedobbeleer
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium
| | | | - Gitte De Boeck
- arGEN-X BVBA, Technologiepark 30, B9052 Zwijnaarde, Gent, Belgium
| | - Julie Stockis
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium
| | - Caroline Huygens
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium
| | | | - Joan Somja
- Department of Pathology, University Hospital of Liège, and Interdisciplinary Cluster of Applied Genoproteomics (GIGA), Laboratory of Experimental Pathology, University of Liège, B4000 Liège, Belgium
| | - Philippe Delvenne
- Department of Pathology, University Hospital of Liège, and Interdisciplinary Cluster of Applied Genoproteomics (GIGA), Laboratory of Experimental Pathology, University of Liège, B4000 Liège, Belgium
| | - Muriel Hannon
- Department of Pathology, University Hospital of Liège, and Interdisciplinary Cluster of Applied Genoproteomics (GIGA), Laboratory of Experimental Pathology, University of Liège, B4000 Liège, Belgium
| | - Frédéric Baron
- Department of Pathology, University Hospital of Liège, and Interdisciplinary Cluster of Applied Genoproteomics (GIGA), Laboratory of Experimental Pathology, University of Liège, B4000 Liège, Belgium
| | | | | | - Hans De Haard
- arGEN-X BVBA, Technologiepark 30, B9052 Zwijnaarde, Gent, Belgium
| | - Michael Saunders
- arGEN-X BVBA, Technologiepark 30, B9052 Zwijnaarde, Gent, Belgium
| | - Pierre G Coulie
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium
| | - Sophie Lucas
- de Duve Institute, Université catholique de Louvain, and WELBIO, B1200 Brussels, Belgium.
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Huygens C, Liénart S, Dedobbeleer O, Stockis J, Gauthy E, Coulie PG, Lucas S. Lysosomal-associated Transmembrane Protein 4B (LAPTM4B) Decreases Transforming Growth Factor β1 (TGF-β1) Production in Human Regulatory T Cells. J Biol Chem 2015; 290:20105-16. [PMID: 26126825 DOI: 10.1074/jbc.m115.655340] [Citation(s) in RCA: 18] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Indexed: 12/30/2022] Open
Abstract
Production of active TGF-β1 is one mechanism by which human regulatory T cells (Tregs) suppress immune responses. This production is regulated by glycoprotein A repetitions predominant (GARP), a transmembrane protein present on stimulated Tregs but not on other T lymphocytes (Th and CTLs). GARP forms disulfide bonds with proTGF-β1, favors its cleavage into latent inactive TGF-β1, induces the secretion and surface presentation of GARP·latent TGF-β1 complexes, and is required for activation of the cytokine in Tregs. We explored whether additional Treg-specific protein(s) associated with GARP·TGF-β1 complexes regulate TGF-β1 production in Tregs. We searched for such proteins by yeast two-hybrid assay, using GARP as a bait to screen a human Treg cDNA library. We identified lysosomal-associated transmembrane protein 4B (LAPTM4B), which interacts with GARP in mammalian cells and is expressed at higher levels in Tregs than in Th cells. LAPTM4B decreases cleavage of proTGF-β1, secretion of soluble latent TGF-β1, and surface presentation of GARP·TGF-β1 complexes by Tregs but does not contribute to TGF-β1 activation. Therefore, LAPTM4B binds to GARP and is a negative regulator of TGF-β1 production in human Tregs. It may play a role in the control of immune responses by decreasing Treg immunosuppression.
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Affiliation(s)
- Caroline Huygens
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Stéphanie Liénart
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Olivier Dedobbeleer
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Julie Stockis
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Emilie Gauthy
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Pierre G Coulie
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Sophie Lucas
- From the de Duve Institute and WELBIO, Université catholique de Louvain, 1200 Brussels, Belgium
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13
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Charni Chaabane S, Coomans de Brachène A, Essaghir A, Velghe A, Lo Re S, Stockis J, Lucas S, Khachigian LM, Huaux F, Demoulin JB. PDGF-D expression is down-regulated by TGFβ in fibroblasts. PLoS One 2014; 9:e108656. [PMID: 25280005 PMCID: PMC4184810 DOI: 10.1371/journal.pone.0108656] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 08/24/2014] [Indexed: 02/07/2023] Open
Abstract
Transforming growth factor-β (TGFβ) is a key mediator of fibrogenesis. TGFβ is overexpressed and activated in fibrotic diseases, regulates fibroblast differentiation into myofibroblasts and induces extracellular matrix deposition. Platelet-derived growth factor (PDGF) is also a regulator of fibrogenesis. Some studies showed a link between TGFβ and PDGF in certain fibrotic diseases. TGFβ induces PDGF receptor alpha expression in scleroderma fibroblasts. PDGF-C and -D are the most recently discovered ligands and also play a role in fibrosis. In this study, we report the first link between TGFβ and PDGF-D and -C ligands. In normal fibroblasts, TGFβ down-regulated PDGF-D expression and up-regulated PDGF-C expression at the mRNA and protein levels. This phenomenon is not limited to TGFβ since other growth factors implicated in fibrosis, such as FGF, EGF and PDGF-B, also regulated PDGF-D and PDGF-C expression. Among different kinase inhibitors, only TGFβ receptor inhibitors and the IκB kinase (IKK) inhibitor BMS-345541 blocked the effect of TGFβ. However, activation of the classical NF-κB pathway was not involved. Interestingly, in a model of lung fibrosis induced by either bleomycin or silica, PDGF-D was down-regulated, which correlates with the production of TGFβ and other fibrotic growth factors. In conclusion, the down-regulation of PDGF-D by TGFβ and other growth factors may serve as a negative feedback in the network of cytokines that control fibrosis.
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Affiliation(s)
| | | | - Ahmed Essaghir
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Amélie Velghe
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Sandra Lo Re
- Louvain center of Toxicology and Applied Pharmacology, Institute of Experimental and Clinical Research, Université catholique de Louvain, Brussels, Belgium
| | - Julie Stockis
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Sophie Lucas
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
- Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wallonia, Belgium
| | - Levon M. Khachigian
- Center of Vascular Research, University of New South Wales, Sydney, Australia
| | - François Huaux
- Louvain center of Toxicology and Applied Pharmacology, Institute of Experimental and Clinical Research, Université catholique de Louvain, Brussels, Belgium
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14
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Gauthy E, Cuende J, Stockis J, Huygens C, Lethé B, Collet JF, Bommer G, Coulie PG, Lucas S. GARP is regulated by miRNAs and controls latent TGF-β1 production by human regulatory T cells. PLoS One 2013; 8:e76186. [PMID: 24098777 PMCID: PMC3787020 DOI: 10.1371/journal.pone.0076186] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 08/21/2013] [Indexed: 11/18/2022] Open
Abstract
GARP is a transmembrane protein present on stimulated human regulatory T lymphocytes (Tregs), but not on other T lymphocytes (Th cells). It presents the latent form of TGF-β1 on the Treg surface. We report here that GARP favors the cleavage of the pro-TGF-β1 precursor and increases the amount of secreted latent TGF-β1. Stimulated Tregs, which naturally express GARP, and Th cells transfected with GARP secrete a previously unknown form of latent TGF-β1 that is disulfide-linked to GARP. These GARP/TGF-β1 complexes are possibly shed from the T cell surface. Secretion of GARP/TGF-β1 complexes was not observed with transfected 293 cells and may thus be restricted to the T cell lineage. We conclude that in stimulated human Tregs, GARP not only displays latent TGF-β1 at the cell surface, but also increases its secretion by forming soluble disulfide-linked complexes. Moreover, we identified six microRNAs (miRNAs) that are expressed at lower levels in Treg than in Th clones and that target a short region of the GARP 3’ UTR. In transfected Th cells, the presence of this region decreased GARP levels, cleavage of pro-TGF-β1, and secretion of latent TGF-β1.
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Affiliation(s)
- Emilie Gauthy
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Julia Cuende
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Julie Stockis
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Caroline Huygens
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Bernard Lethé
- Ludwig Institute for Cancer Research Ltd, Brussels branch, Brussels, Belgium
| | - Jean-François Collet
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Guido Bommer
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Pierre G. Coulie
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Sophie Lucas
- WELBIO and de Duve Institute, Université catholique de Louvain, Brussels, Belgium
- * E-mail:
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15
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Diepart C, Karroum O, Magat J, Feron O, Verrax J, Calderon PB, Grégoire V, Leveque P, Stockis J, Dauguet N, Jordan BF, Gallez B. Arsenic trioxide treatment decreases the oxygen consumption rate of tumor cells and radiosensitizes solid tumors. Cancer Res 2011; 72:482-90. [PMID: 22139377 DOI: 10.1158/0008-5472.can-11-1755] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Arsenic trioxide (As(2)O(3)) is an effective therapeutic against acute promyelocytic leukemia and certain solid tumors. Because As(2)O(3) inhibits mitochondrial respiration in leukemia cells, we hypothesized that As(2)O(3) might enhance the radiosensitivity of solid tumors by increasing tumor oxygenation [partial pressure of oxygen (pO(2))] via a decrease in oxygen consumption. Two murine models of radioresistant hypoxic cancer were used to study the effects of As(2)O(3). We measured pO(2) and the oxygen consumption rate in vivo by electron paramagnetic resonance oximetry and (19)fluorine-MRI relaxometry. Tumor perfusion was assessed by Patent blue staining. In both models, As(2)O(3) inhibited mitochondrial respiration, leading to a rapid increase in pO(2). The decrease in oxygen consumption could be explained by an observed decrease in glutathione in As(2)O(3)-treated cells, as this could increase intracellular reactive oxygen species that can disrupt mitochondrial membrane potential. When tumors were irradiated during periods of As(2)O(3)-induced augmented oxygenation, radiosensitivity increased by 2.2-fold compared with control mice. Notably, this effect was abolished when temporarily clamped tumors were irradiated. Together, our findings show that As(2)O(3) acutely increases oxygen consumption and radiosensitizes tumors, providing a new rationale for clinical investigations of As(2)O(3) in irradiation protocols to treat solid tumors.
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Affiliation(s)
- Caroline Diepart
- Biomedical Magnetic Resonance Group, Louvain Research Institute, Université Catholique de Louvain, Brussels, Belgium
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16
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de Vries IJM, Castelli C, Huygens C, Jacobs JFM, Stockis J, Schuler-Thurner B, Adema GJ, Punt CJA, Rivoltini L, Schuler G, Coulie PG, Lucas S. Frequency of circulating Tregs with demethylated FOXP3 intron 1 in melanoma patients receiving tumor vaccines and potentially Treg-depleting agents. Clin Cancer Res 2010; 17:841-8. [PMID: 21177412 DOI: 10.1158/1078-0432.ccr-10-2227] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Regulatory T cells (Tregs) are thought to inhibit antitumor immune responses, and their depletion could therefore have a synergistic effect with therapeutic cancer vaccines. We investigated the impact of three medications on blood Treg frequency in vaccinated cancer patients. EXPERIMENTAL DESIGN To date, the most specific marker for human Tregs is demethylation in the DNA that encodes the transcription factor FOXP3. Thus, we used a FOXP3 methylation-specific quantitative PCR assay (MS-qPCR) to measure Treg frequencies in the peripheral blood mononuclear cells (PBMCs) of melanoma patients. The patients participated in three clinical trials that combined tumor vaccines with potential Treg-depleting agents: low-dose cyclophosphamide, anti-CD25 monoclonal antibody daclizumab, and the IL-2/diphtheria toxin fusion protein denileukin diftitox. RESULTS In the nine control patients, blood Treg frequencies varied over time; there was a 46% reduction in one patient. In treated patients, a more than 2-fold decrease in Tregs was observed in one out of 11 patients receiving cyclophosphamide and in four out of 13 receiving daclizumab, but there was no such Treg decrease in any of the six patients who received denileukin diftitox. As a positive control, a more than 2-fold increase in blood Tregs was detected in four out of nine patients who were treated with interleukin-2. CONCLUSIONS We used a MS-qPCR method that detects Tregs but not other activated T lymphocytes; however, none of the Treg-depleting strategies that we tested led, in the majority of patients, to a conservative 50% reduction in blood Tregs.
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Affiliation(s)
- I Jolanda M de Vries
- Department of Medical Oncology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, The Netherlands
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Stockis J, Colau D, Coulie PG, Lucas S. Membrane protein GARP is a receptor for latent TGF-beta on the surface of activated human Treg. Eur J Immunol 2010; 39:3315-22. [PMID: 19750484 DOI: 10.1002/eji.200939684] [Citation(s) in RCA: 197] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Human Treg and Th clones secrete the latent form of TGF-beta, in which the mature TGF-beta protein is bound to the latency-associated peptide (LAP), and is thereby prevented from binding to the TGF-beta receptor. We previously showed that upon TCR stimulation, human Treg clones but not Th clones produce active TGF-beta and bear LAP on their surface. Here, we show that latent TGF-beta, i.e. both LAP and mature TGF-beta, binds to glycoprotein A repetitions predominant (GARP), a transmembrane protein containing leucine rich repeats, which is present on the surface of stimulated Treg clones but not on Th clones. Membrane localization of latent TGF-beta mediated by binding to GARP may be necessary for the ability of Treg to activate TGF-beta upon TCR stimulation. However, it is not sufficient as lentiviral-mediated expression of GARP in human Th cells induces binding of latent TGF-beta to the cell surface, but does not result in the production of active TGF-beta upon stimulation of these Th cells.
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Affiliation(s)
- Julie Stockis
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
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18
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François V, Ottaviani S, Renkvist N, Stockis J, Schuler G, Thielemans K, Colau D, Marchand M, Boon T, Lucas S, van der Bruggen P. The CD4+ T-Cell Response of Melanoma Patients to a MAGE-A3 Peptide Vaccine Involves Potential Regulatory T Cells. Cancer Res 2009; 69:4335-45. [DOI: 10.1158/0008-5472.can-08-3726] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Stockis J, Fink W, François V, Connerotte T, de Smet C, Knoops L, van der Bruggen P, Boon T, Coulie PG, Lucas S. Comparison of stable human Treg and Th clones by transcriptional profiling. Eur J Immunol 2009; 39:869-82. [PMID: 19224638 DOI: 10.1002/eji.200838807] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
From cancerous and non-cancerous patients, we derived stable clones of CD4(+) Treg, defined as clones that expressed high CD25 at rest, were anergic in vitro, and suppressed the proliferation of co-cultured CD4(+) cells. A conserved region of FOXP3 intron 1 was demethylated in all Treg clones, whereas it was methylated in non-regulatory Th and CTL clones. In our panel of human clones, this stable epigenetic mark correlated better with suppressive activity than did FOXP3 mRNA or protein expression. We used expression microarrays to compare Treg and Th clones after activation, which is required for suppressive function. The transcriptional profile that is specific of activated Treg clones includes a TGF-beta signature. Both activated Treg and Th clones produced the latent form of TGF-beta. However, SMAD2 phosphorylation was observed after activation in the Treg but not in the Th clones, indicating that only activated Treg clones produced the bioactive form of TGF-beta. A TGF-beta signature was also displayed by a Th clone "suppressed" by a Treg clone. In conclusion, the hallmark of our panel of activated human Treg clones is to produce bioactive TGF-beta which has autocrine actions on Tregs and can have paracrine actions on other T cells.
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Affiliation(s)
- Julie Stockis
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
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20
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Verrax J, Vanbever S, Stockis J, Taper H, Calderon PB. Role of glycolysis inhibition and poly(ADP-ribose) polymerase activation in necrotic-like cell death caused by ascorbate/menadione-induced oxidative stress in K562 human chronic myelogenous leukemic cells. Int J Cancer 2007; 120:1192-7. [PMID: 17163414 DOI: 10.1002/ijc.22439] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Among different features of cancer cells, two of them have retained our interest: their nearly universal glycolytic phenotype and their sensitivity towards an oxidative stress. Therefore, we took advantage of these features to develop an experimental approach by selectively exposing cancer cells to an oxidant insult induced by the combination of menadione (vitamin K(3)) and ascorbate (vitamin C). Ascorbate enhances the menadione redox cycling, increases the formation of reactive oxygen species and kills K562 cells as shown by more than 65% of LDH leakage after 24 hr of incubation. Since both lactate formation and ATP content are depressed by about 80% following ascorbate/menadione exposure, we suggest that the major intracellular event involved in such a cytotoxicity is related to the impairment of glycolysis. Indeed, NAD(+) is rapidly and severely depleted, a fact most probably related to a strong Poly(ADP-ribose) polymerase (PARP) activation, as shown by the high amount of poly-ADP-ribosylated proteins. The addition of N-acetylcysteine (NAC) restores most of the ATP content and the production of lactate as well. The PARP inhibitor dihydroxyisoquinoline (DiQ) was able to partially restore both parameters as well as cell death induced by ascorbate/menadione. These results suggest that the PARP activation induced by the oxidative stress is a major but not the only intracellular event involved in cell death by ascorbate/menadione. Due to the high energetic dependence of cancer cells on glycolysis, the impairment of such an essential pathway may explain the effectiveness of this combination to kill cancer cells.
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Affiliation(s)
- Julien Verrax
- Unité de Pharmacocinétique, Métabolisme, Nutrition et Toxicologie, Département des sciences pharmaceutiques, Université Catholique de Louvain, Belgium
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Verrax J, Stockis J, Tison A, Taper HS, Calderon PB. Oxidative stress by ascorbate/menadione association kills K562 human chronic myelogenous leukaemia cells and inhibits its tumour growth in nude mice. Biochem Pharmacol 2006; 72:671-80. [PMID: 16828058 DOI: 10.1016/j.bcp.2006.05.025] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2006] [Revised: 05/09/2006] [Accepted: 05/30/2006] [Indexed: 10/24/2022]
Abstract
The effect of oxidative stress induced by the ascorbate/menadione-redox association was examined in K562 cells, a human erythromyeloid leukaemia cell line. Our results show that ascorbate enhances menadione redox cycling, leading to the formation of intracellular reactive oxygen species (as shown by dihydrorhodamine 123 oxidation). The incubation of cells in the presence of both ascorbate/menadione and aminotriazole, a catalase inhibitor, resulted in a strong decrease of cell survival, reinforcing the role of H(2)O(2) as the main oxidizing agent killing K562 cells. This cell death was not caspase-3-dependent. Indeed, neither procaspase-3 and PARP were processed and only a weak cytochrome c release was observed. Moreover, we observed only 23% of cells with depolarized mitochondria. In ascorbate/menadione-treated cells, DNA fragmentation was observed without any sign of chromatin condensation (DAPI and TUNEL tests). The cell demise by ascorbate/menadione is consistent with a necrosis-like cell death confirmed by both cytometric profile of annexin-V/propidium iodide labeled cells and by light microscopy examination. Finally, we showed that a single i.p. administration of the association of ascorbate and menadione is able to inhibit the growth of K562 cells by about 60% (in both tumour size and volume) in an immune-deficient mice model. Taken together, these results reinforced our previous claims about a potential application of the ascorbate/menadione association in cancer therapy.
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Affiliation(s)
- Julien Verrax
- Unité de Pharmacocinétique, Métabolisme, Nutrition et Toxicologie, Département des sciences pharmaceutiques, Université Catholique de Louvain, Belgium.
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