P2X7 Receptor Activity Limits Accumulation of T Cells within Tumors

Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentr...

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Published inCancer research (Chicago, Ill.) Vol. 80; no. 18; pp. 3906 - 3919
Main Authors Romagnani, Andrea, Rottoli, Elsa, Mazza, Emilia Maria Cristina, Rezzonico-Jost, Tanja, De Ponte Conti, Benedetta, Proietti, Michele, Perotti, Michela, Civanelli, Elisa, Perruzza, Lisa, Catapano, Alberico L., Baragetti, Andrea, Tenedini, Elena, Tagliafico, Enrico, Falzoni, Simonetta, Di Virgilio, Francesco, Norata, Giuseppe Danilo, Bicciato, Silvio, Grassi, Fabio
Format Journal Article
LanguageEnglish
Published United States 15.09.2020
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Abstract Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentration compatible with activation of the ATP-gated ionotropic P2X7 receptor. Here, we show that P2X7 activity in tumor-infiltrating lymphocytes (TIL) induces cellular senescence and limits tumor suppression. P2X7 stimulation affected cell cycling of effector T cells and resulted in generation of mitochondrial reactive oxygen species and p38 MAPK-dependent upregulation of cyclin-dependent kinase inhibitor 1A (Cdkn1a, encoding for p21Waf1/Cip1). Lack of P2X7 promoted a transcriptional signature that correlated with enhanced cytotoxic T-cell response in human solid tumors. In mice, transfer of tumor-specific T cells with deletion of P2rx7 significantly reduced tumor growth and extended survival. Collectively, these findings uncover a purinergic checkpoint that can be targeted to improve the efficacy of cancer immunotherapy strategies.
AbstractList Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentration compatible with activation of the ATP-gated ionotropic P2X7 receptor. Here, we show that P2X7 activity in tumor-infiltrating lymphocytes (TIL) induces cellular senescence and limits tumor suppression. P2X7 stimulation affected cell cycling of effector T cells and resulted in generation of mitochondrial reactive oxygen species and p38 MAPK-dependent upregulation of cyclin-dependent kinase inhibitor 1A (Cdkn1a, encoding for p21Waf1/Cip1). Lack of P2X7 promoted a transcriptional signature that correlated with enhanced cytotoxic T-cell response in human solid tumors. In mice, transfer of tumor-specific T cells with deletion of P2rx7 significantly reduced tumor growth and extended survival. Collectively, these findings uncover a purinergic checkpoint that can be targeted to improve the efficacy of cancer immunotherapy strategies. SIGNIFICANCE: These findings suggest that the purinergic checkpoint P2X7 may be targeted to enhance T-cell-mediated cancer immunotherapy and improve T effector cell accumulation in the tumor microenvironment. GRAPHICAL ABSTRACT: http://cancerres.aacrjournals.org/content/canres/80/18/3906/F1.large.jpg.Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentration compatible with activation of the ATP-gated ionotropic P2X7 receptor. Here, we show that P2X7 activity in tumor-infiltrating lymphocytes (TIL) induces cellular senescence and limits tumor suppression. P2X7 stimulation affected cell cycling of effector T cells and resulted in generation of mitochondrial reactive oxygen species and p38 MAPK-dependent upregulation of cyclin-dependent kinase inhibitor 1A (Cdkn1a, encoding for p21Waf1/Cip1). Lack of P2X7 promoted a transcriptional signature that correlated with enhanced cytotoxic T-cell response in human solid tumors. In mice, transfer of tumor-specific T cells with deletion of P2rx7 significantly reduced tumor growth and extended survival. Collectively, these findings uncover a purinergic checkpoint that can be targeted to improve the efficacy of cancer immunotherapy strategies. SIGNIFICANCE: These findings suggest that the purinergic checkpoint P2X7 may be targeted to enhance T-cell-mediated cancer immunotherapy and improve T effector cell accumulation in the tumor microenvironment. GRAPHICAL ABSTRACT: http://cancerres.aacrjournals.org/content/canres/80/18/3906/F1.large.jpg.
Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentration compatible with activation of the ATP-gated ionotropic P2X7 receptor. Here, we show that P2X7 activity in tumor-infiltrating lymphocytes (TIL) induces cellular senescence and limits tumor suppression. P2X7 stimulation affected cell cycling of effector T cells and resulted in generation of mitochondrial reactive oxygen species and p38 MAPK-dependent upregulation of cyclin-dependent kinase inhibitor 1A ( , encoding for p21 ). Lack of P2X7 promoted a transcriptional signature that correlated with enhanced cytotoxic T-cell response in human solid tumors. In mice, transfer of tumor-specific T cells with deletion of significantly reduced tumor growth and extended survival. Collectively, these findings uncover a purinergic checkpoint that can be targeted to improve the efficacy of cancer immunotherapy strategies. SIGNIFICANCE: These findings suggest that the purinergic checkpoint P2X7 may be targeted to enhance T-cell-mediated cancer immunotherapy and improve T effector cell accumulation in the tumor microenvironment. GRAPHICAL ABSTRACT: http://cancerres.aacrjournals.org/content/canres/80/18/3906/F1.large.jpg.
Extracellular adenosine triphosphate (eATP) is a signaling molecule which variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentration compatible with activation of the ATP-gated ionotropic P2X7 receptor. Here we show that P2X7 activity in tumor-infiltrating T cells (TILs) induces cellular senescence and limits tumor suppression. P2X7 stimulation affected cell cycling of effector T cells and resulted in generation of mitochondrial reactive oxygen species (ROS) and p38 MAPK-dependent upregulation of cyclin-dependent kinase inhibitor 1A ( Cdkn1a , encoding for p21 Waf1/Cip1 ). Lack of P2X7 promoted a transcriptional signature that correlated with enhanced cytotoxic T cell response in human solid tumors. In mice, transfer of tumor specific T cells with deletion of P2rx7 significantly reduced tumor growth and extended survival. Collectively, these findings uncover a purinergic checkpoint that can be targeted to improve the efficacy of cancer immunotherapy strategies.
Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine. Although eATP is virtually absent in the interstitium of normal tissues, it can be present in the hundreds of micromolar range in tumors, a concentration compatible with activation of the ATP-gated ionotropic P2X7 receptor. Here, we show that P2X7 activity in tumor-infiltrating lymphocytes (TIL) induces cellular senescence and limits tumor suppression. P2X7 stimulation affected cell cycling of effector T cells and resulted in generation of mitochondrial reactive oxygen species and p38 MAPK-dependent upregulation of cyclin-dependent kinase inhibitor 1A (Cdkn1a, encoding for p21Waf1/Cip1). Lack of P2X7 promoted a transcriptional signature that correlated with enhanced cytotoxic T-cell response in human solid tumors. In mice, transfer of tumor-specific T cells with deletion of P2rx7 significantly reduced tumor growth and extended survival. Collectively, these findings uncover a purinergic checkpoint that can be targeted to improve the efficacy of cancer immunotherapy strategies.
Author Grassi, Fabio
Rottoli, Elsa
Di Virgilio, Francesco
Mazza, Emilia Maria Cristina
Proietti, Michele
Civanelli, Elisa
Catapano, Alberico L.
Tagliafico, Enrico
De Ponte Conti, Benedetta
Perruzza, Lisa
Bicciato, Silvio
Baragetti, Andrea
Rezzonico-Jost, Tanja
Tenedini, Elena
Romagnani, Andrea
Falzoni, Simonetta
Norata, Giuseppe Danilo
Perotti, Michela
AuthorAffiliation 1 Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, 6500 Bellinzona, Switzerland
2 Department of Medical Biotechnology and Translational Medicine, University of Milan, 20129 Milan, Italy
4 Institute for Microbiology, ETH Zürich, 8093 Zürich, Switzerland
8 Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, University of Ferrara, 44121 Ferrara, Italy
3 Department of Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
5 Department of Excellence in Pharmacological and Biomolecular Sciences, University of Milan, 20133 Milan, Italy
6 IRCSS Multimedica, 20138 Milan, Italy
9 Istituto Nazionale Genetica Molecolare “Romeo ed Enrica Invernizzi”, 20122 Milan, Italy
7 Department of Medical and Surgical Sciences for Children and Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/32699136$$D View this record in MEDLINE/PubMed
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Present address: F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland (A.R.); Laboratory of Translational Immunology, Humanitas Clinical and Research Center, 20089 Rozzano, Milan, Italy (E.M.C.M.); CCI-Center for Chronic Immunodeficiency, Universitätsklinikum Freiburg, 79106 Freiburg, Germany (M.P.).
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Snippet Extracellular ATP (eATP) is a signaling molecule that variably affects all cells of the immune system either directly or after hydrolysis to adenosine....
Extracellular adenosine triphosphate (eATP) is a signaling molecule which variably affects all cells of the immune system either directly or after hydrolysis...
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StartPage 3906
SubjectTerms Adenosine Triphosphate - metabolism
Animals
CD4-Positive T-Lymphocytes - immunology
CD8-Positive T-Lymphocytes - immunology
Cell Cycle
Cell Line, Tumor
Cell Migration Inhibition
Cellular Senescence - immunology
Cyclin-Dependent Kinase Inhibitor p21 - metabolism
Flow Cytometry - methods
Gene Expression Profiling
Humans
Immune Checkpoint Inhibitors - therapeutic use
Immunotherapy, Adoptive - methods
Lymphocytes, Tumor-Infiltrating - immunology
Lymphocytes, Tumor-Infiltrating - metabolism
Melanoma, Experimental - immunology
Melanoma, Experimental - pathology
Melanoma, Experimental - therapy
Mice
Mice, Inbred C57BL
Mitochondria - metabolism
Neoplasm Transplantation
Purinergic P2X Receptor Antagonists
Reactive Oxygen Species - metabolism
Receptors, Purinergic P2X7 - deficiency
Receptors, Purinergic P2X7 - metabolism
T-Lymphocytes, Cytotoxic - immunology
Transcription, Genetic
Tumor Microenvironment - immunology
Up-Regulation
Title P2X7 Receptor Activity Limits Accumulation of T Cells within Tumors
URI https://www.ncbi.nlm.nih.gov/pubmed/32699136
https://www.proquest.com/docview/2426536498
https://pubmed.ncbi.nlm.nih.gov/PMC7611351
Volume 80
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