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Cao T, Lu Y, Wang Q, Qin H, Li H, Guo H, Ge M, Glass SE, Singh B, Zhang W, Dong J, Du F, Qian A, Tian Y, Wang X, Li C, Wu K, Fan D, Nie Y, Coffey RJ, Zhao X. A CGA/EGFR/GATA2 positive feedback circuit confers chemoresistance in gastric cancer. J Clin Invest 2022; 132:154074. [PMID: 35289315 PMCID: PMC8920335 DOI: 10.1172/jci154074] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 01/26/2022] [Indexed: 12/24/2022] Open
Abstract
De novo and acquired resistance are major impediments to the efficacy of conventional and targeted cancer therapy. In unselected gastric cancer (GC) patients with advanced disease, trials combining chemotherapy and an anti-EGFR monoclonal antibody have been largely unsuccessful. In an effort to identify biomarkers of resistance so as to better select patients for such trials, we screened the secretome of chemotherapy-treated human GC cell lines. We found that levels of CGA, the α-subunit of glycoprotein hormones, were markedly increased in the conditioned media of chemoresistant GC cells, and CGA immunoreactivity was enhanced in GC tissues that progressed on chemotherapy. CGA levels in plasma increased in GC patients who received chemotherapy, and this increase was correlated with reduced responsiveness to chemotherapy and poor survival. Mechanistically, secreted CGA was found to bind to EGFR and activate EGFR signaling, thereby conferring a survival advantage to GC cells. N-glycosylation of CGA at Asn52 and Asn78 is required for its stability, secretion, and interaction with EGFR. GATA2 was found to activate CGA transcription, whose increase, in turn, induced the expression and phosphorylation of GATA2 in an EGFR-dependent manner, forming a positive feedback circuit that was initiated by GATA2 autoregulation upon sublethal exposure to chemotherapy. Based on this circuit, combination strategies involving anti-EGFR therapies or targeting CGA with microRNAs (miR-708-3p and miR-761) restored chemotherapy sensitivity. These findings identify a clinically actionable CGA/EGFR/GATA2 circuit and highlight CGA as a predictive biomarker and therapeutic target in chemoresistant GC.
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Affiliation(s)
- Tianyu Cao
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Yuanyuan Lu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Qi Wang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Hongqiang Qin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Hongwei Li
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Hao Guo
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China.,State Key Laboratory of Translational Medicine and Innovative Drug Development, Jiangsu Simcere Diagnostics Co., Ltd., Nanjing, China
| | - Minghui Ge
- State Key Laboratory of Translational Medicine and Innovative Drug Development, Jiangsu Simcere Diagnostics Co., Ltd., Nanjing, China
| | - Sarah E Glass
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Bhuminder Singh
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Wenyao Zhang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Jiaqiang Dong
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Feng Du
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Airong Qian
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Ye Tian
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Xin Wang
- Department of Gastroenterology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Cunxi Li
- Beijing Institute of Human Reproduction and Genetics Medicine, Beijing, China.,Jiaen Genetics Laboratory, Beijing Jiaen Hospital, Beijing, China
| | - Kaichun Wu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Daiming Fan
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Robert J Coffey
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Xiaodi Zhao
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
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2
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Rasi V, Hameed OA, Matthey P, Bera S, Grandgenett DP, Salentinig S, Walch M, Hoft DF. Improved Purification of Human Granzyme A/B and Granulysin Using a Mammalian Expression System. Front Immunol 2022; 13:830290. [PMID: 35300343 PMCID: PMC8921980 DOI: 10.3389/fimmu.2022.830290] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 02/08/2022] [Indexed: 01/14/2023] Open
Abstract
Cytotoxic lymphocytes release proteins contained within the cytoplasmic cytolytic granules after recognition of infected or tumor target cells. These cytotoxic granular proteins (namely granzymes, granulysin, and perforin) are key immunological mediators within human cellular immunity. The availability of highly purified cytotoxic proteins has been fundamental for understanding their function in immunity and mechanistic involvement in sepsis and autoimmunity. Methods for recovery of native cytotoxic proteins can be problematic leading to: 1) the co-purification of additional proteins, confounding interpretation of function, and 2) low yields of highly purified proteins. Recombinant protein expression of individual cytolytic components can overcome these challenges. The use of mammalian expression systems is preferred for optimal post-translational modifications and avoidance of endotoxin contamination. Some of these proteins have been proposed for host directed human therapies (e.g. - granzyme A), or treatment of systemic infections or tumors as in granulysin. We report here a novel expression system using HEK293T cells for cost-effective purification of high yields of human granzymes (granzyme A and granzyme B) and granulysin with enhanced biological activity than previous reports. The resulting proteins are free of native contaminants, fold correctly, and remain enzymatically active. Importantly, these improvements have also led to the first purification of biologically active recombinant human granulysin in high yields from a mammalian system. This method can be used as a template for purification of many other secreted cellular proteins and may lead to advances for human medicine.
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Affiliation(s)
- Valerio Rasi
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States,Department of Internal Medicine, Division of Infectious Diseases, Allergy and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Owais Abdul Hameed
- Anatomy Unit, Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland,Department of Chemistry, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Patricia Matthey
- Anatomy Unit, Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Sibes Bera
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Duane P. Grandgenett
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Stefan Salentinig
- Department of Chemistry, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Michael Walch
- Anatomy Unit, Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland,*Correspondence: Daniel F. Hoft, ; Michael Walch,
| | - Daniel F. Hoft
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States,Department of Internal Medicine, Division of Infectious Diseases, Allergy and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States,*Correspondence: Daniel F. Hoft, ; Michael Walch,
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3
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Lavergne M, Hernández-Castañeda MA, Mantel PY, Martinvalet D, Walch M. Oxidative and Non-Oxidative Antimicrobial Activities of the Granzymes. Front Immunol 2021; 12:750512. [PMID: 34707614 PMCID: PMC8542974 DOI: 10.3389/fimmu.2021.750512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 09/23/2021] [Indexed: 01/11/2023] Open
Abstract
Cell-mediated cytotoxicity is an essential immune defense mechanism to fight against viral, bacterial or parasitic infections. Upon recognition of an infected target cell, killer lymphocytes form an immunological synapse to release the content of their cytotoxic granules. Cytotoxic granules of humans contain two membrane-disrupting proteins, perforin and granulysin, as well as a homologous family of five death-inducing serine proteases, the granzymes. The granzymes, after delivery into infected host cells by the membrane disrupting proteins, may contribute to the clearance of microbial pathogens through different mechanisms. The granzymes can induce host cell apoptosis, which deprives intracellular pathogens of their protective niche, therefore limiting their replication. However, many obligate intracellular pathogens have evolved mechanisms to inhibit programed cells death. To overcome these limitations, the granzymes can exert non-cytolytic antimicrobial activities by directly degrading microbial substrates or hijacked host proteins crucial for the replication or survival of the pathogens. The granzymes may also attack factors that mediate microbial virulence, therefore directly affecting their pathogenicity. Many mechanisms applied by the granzymes to eliminate infected cells and microbial pathogens rely on the induction of reactive oxygen species. These reactive oxygen species may be directly cytotoxic or enhance death programs triggered by the granzymes. Here, in the light of the latest advances, we review the antimicrobial activities of the granzymes in regards to their cytolytic and non-cytolytic activities to inhibit pathogen replication and invasion. We also discuss how reactive oxygen species contribute to the various antimicrobial mechanisms exerted by the granzymes.
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Affiliation(s)
- Marilyne Lavergne
- Department of Oncology, Microbiology and Immunology, Anatomy Unit, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Maria Andrea Hernández-Castañeda
- Division Infectious Disease and International Medicine, Department of Medicine, Center for Immunology, Minneapolis, MN, United States
| | - Pierre-Yves Mantel
- Department of Oncology, Microbiology and Immunology, Anatomy Unit, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Denis Martinvalet
- Department of Biomedical Sciences, Venetian Institute of Molecular Medicine, Padova, Italy.,Department of Biomedical Sciences, University of Padua, Padova, Italy
| | - Michael Walch
- Department of Oncology, Microbiology and Immunology, Anatomy Unit, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
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4
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Rasi V, Wood DC, Eickhoff CS, Xia M, Pozzi N, Edwards RL, Walch M, Bovenschen N, Hoft DF. Granzyme A Produced by γ 9δ 2 T Cells Activates ER Stress Responses and ATP Production, and Protects Against Intracellular Mycobacterial Replication Independent of Enzymatic Activity. Front Immunol 2021; 12:712678. [PMID: 34413857 PMCID: PMC8368726 DOI: 10.3389/fimmu.2021.712678] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/12/2021] [Indexed: 01/14/2023] Open
Abstract
Mycobacterium tuberculosis (Mtb), the pathological agent that causes tuberculosis (TB) is the number one infectious killer worldwide with one fourth of the world's population currently infected. Data indicate that γ9δ2 T cells secrete Granzyme A (GzmA) in the extracellular space triggering the infected monocyte to inhibit growth of intracellular mycobacteria. Accordingly, deletion of GZMA from γ9δ2 T cells reverses their inhibitory capacity. Through mechanistic studies, GzmA's action was investigated in monocytes from human PBMCs. The use of recombinant human GzmA expressed in a mammalian system induced inhibition of intracellular mycobacteria to the same degree as previous human native protein findings. Our data indicate that: 1) GzmA is internalized within mycobacteria-infected cells, suggesting that GzmA uptake could prevent infection and 2) that the active site is not required to inhibit intracellular replication. Global proteomic analysis demonstrated that the ER stress response and ATP producing proteins were upregulated after GzmA treatment, and these proteins abundancies were confirmed by examining their expression in an independent set of patient samples. Our data suggest that immunotherapeutic host interventions of these pathways may contribute to better control of the current TB epidemic.
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Affiliation(s)
- Valerio Rasi
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States,Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - David C. Wood
- Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Christopher S. Eickhoff
- Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Mei Xia
- Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Nicola Pozzi
- Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Rachel L. Edwards
- Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO, United States
| | - Michael Walch
- Anatomy Unit, Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Niels Bovenschen
- Department of Pathology, University Medical Center Utrecht, Utrecht, Netherlands,Center for Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Daniel F. Hoft
- Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, MO, United States,Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO, United States,*Correspondence: Daniel F. Hoft,
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5
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Hansen JM, de Jong MF, Wu Q, Zhang LS, Heisler DB, Alto LT, Alto NM. Pathogenic ubiquitination of GSDMB inhibits NK cell bactericidal functions. Cell 2021; 184:3178-3191.e18. [PMID: 34022140 PMCID: PMC8221529 DOI: 10.1016/j.cell.2021.04.036] [Citation(s) in RCA: 102] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/09/2021] [Accepted: 04/22/2021] [Indexed: 12/25/2022]
Abstract
Gasdermin B (GSDMB) belongs to a large family of pore-forming cytolysins that execute inflammatory cell death programs. While genetic studies have linked GSDMB polymorphisms to human disease, its function in the immunological response to pathogens remains poorly understood. Here, we report a dynamic host-pathogen conflict between GSDMB and the IpaH7.8 effector protein secreted by enteroinvasive Shigella flexneri. We show that IpaH7.8 ubiquitinates and targets GSDMB for 26S proteasome destruction. This virulence strategy protects Shigella from the bacteriocidic activity of natural killer cells by suppressing granzyme-A-mediated activation of GSDMB. In contrast to the canonical function of most gasdermin family members, GSDMB does not inhibit Shigella by lysing host cells. Rather, it exhibits direct microbiocidal activity through recognition of phospholipids found on Gram-negative bacterial membranes. These findings place GSDMB as a central executioner of intracellular bacterial killing and reveal a mechanism employed by pathogens to counteract this host defense system.
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Affiliation(s)
- Justin M Hansen
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maarten F de Jong
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Qi Wu
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Li-Shu Zhang
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - David B Heisler
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Laura T Alto
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Neal M Alto
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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6
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Zhou Z, He H, Wang K, Shi X, Wang Y, Su Y, Wang Y, Li D, Liu W, Zhang Y, Shen L, Han W, Shen L, Ding J, Shao F. Granzyme A from cytotoxic lymphocytes cleaves GSDMB to trigger pyroptosis in target cells. Science 2020; 368:science.aaz7548. [PMID: 32299851 DOI: 10.1126/science.aaz7548] [Citation(s) in RCA: 691] [Impact Index Per Article: 172.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 04/03/2020] [Indexed: 12/13/2022]
Abstract
Cytotoxic lymphocyte-mediated immunity relies on granzymes. Granzymes are thought to kill target cells by inducing apoptosis, although the underlying mechanisms are not fully understood. Here, we report that natural killer cells and cytotoxic T lymphocytes kill gasdermin B (GSDMB)-positive cells through pyroptosis, a form of proinflammatory cell death executed by the gasdermin family of pore-forming proteins. Killing results from the cleavage of GSDMB by lymphocyte-derived granzyme A (GZMA), which unleashes its pore-forming activity. Interferon-γ (IFN-γ) up-regulates GSDMB expression and promotes pyroptosis. GSDMB is highly expressed in certain tissues, particularly digestive tract epithelia, including derived tumors. Introducing GZMA-cleavable GSDMB into mouse cancer cells promotes tumor clearance in mice. This study establishes gasdermin-mediated pyroptosis as a cytotoxic lymphocyte-killing mechanism, which may enhance antitumor immunity.
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Affiliation(s)
- Zhiwei Zhou
- Research Unit of Pyroptosis and Immunity, Chinese Academy of Medical Sciences and National Institute of Biological Sciences, Beijing, Beijing 102206, China.,National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Huabin He
- Peking University-Tsinghua University-National Institute of Biological Sciences Joint Graduate Program, School of Life Sciences, Tsinghua University, Beijing 100084, China.,National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Kun Wang
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Xuyan Shi
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Yupeng Wang
- Research Unit of Pyroptosis and Immunity, Chinese Academy of Medical Sciences and National Institute of Biological Sciences, Beijing, Beijing 102206, China.,National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Ya Su
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Yao Wang
- Department of Molecular and Immunology and Department of Bio-therapeutics, Chinese PLA General Hospital, Beijing 100853, China
| | - Da Li
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Wang Liu
- Research Unit of Pyroptosis and Immunity, Chinese Academy of Medical Sciences and National Institute of Biological Sciences, Beijing, Beijing 102206, China.,National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | | | | | - Weidong Han
- Department of Molecular and Immunology and Department of Bio-therapeutics, Chinese PLA General Hospital, Beijing 100853, China
| | - Lin Shen
- Department of Gastrointestinal Oncology, Peking University Cancer Hospital and Institute, Beijing 100142, China
| | - Jingjin Ding
- National Institute of Biological Sciences, Beijing, Beijing 102206, China.,National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Feng Shao
- Research Unit of Pyroptosis and Immunity, Chinese Academy of Medical Sciences and National Institute of Biological Sciences, Beijing, Beijing 102206, China. .,National Institute of Biological Sciences, Beijing, Beijing 102206, China.,National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences (CAS), Beijing 100101, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China
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7
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Chollat-Namy M, Ben Safta-Saadoun T, Haferssas D, Meurice G, Chouaib S, Thiery J. The pharmalogical reactivation of p53 function improves breast tumor cell lysis by granzyme B and NK cells through induction of autophagy. Cell Death Dis 2019; 10:695. [PMID: 31541080 PMCID: PMC6754511 DOI: 10.1038/s41419-019-1950-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/29/2019] [Accepted: 09/02/2019] [Indexed: 12/14/2022]
Abstract
Cytotoxic T lymphocytes (CTL) and natural killer cells (NK)-mediated elimination of tumor cells is mostly dependent on Granzyme B apoptotic pathway, which is regulated by the wild type (wt) p53 protein. Because TP53 inactivating mutations, frequently found in human tumors, could interfere with Granzyme B-mediated cell death, the use of small molecules developed to reactivate wtp53 function in p53-mutated tumor cells could optimize their lysis by CTL or NK cells. Here, we show that the pharmalogical reactivation of a wt-like p53 function in p53-mutated breast cancer cells using the small molecule CP-31398 increases their sensitivity to NK-mediated lysis. This potentiation is dependent on p53-mediated induction of autophagy via the sestrin-AMPK-mTOR pathway and the ULK axis. This CP31398-induced autophagy sequestrates in autophagosomes several anti-apoptotic proteins, including Bcl-XL and XIAP, facilitating Granzyme B-mediated mitochondrial outer membrane permeabilization, caspase-3 activation and Granzyme B- or NK cell-induced apoptosis. Together, our results define a new way to increase cytotoxic lymphocyte-mediated lysis of p53-mutated breast cancer cell, through a p53-dependent autophagy induction, with potential applications in combined immunotherapeutic approaches.
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Affiliation(s)
- Marie Chollat-Namy
- INSERM U1186, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,University Paris Sud, Faculty of Medicine, Le Kremlin Bicêtre, France
| | - Thouraya Ben Safta-Saadoun
- INSERM U1186, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,University Paris Sud, Faculty of Medicine, Le Kremlin Bicêtre, France
| | - Djazia Haferssas
- INSERM U1186, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,University Paris Sud, Faculty of Medicine, Le Kremlin Bicêtre, France
| | - Guillaume Meurice
- Bioinformatic Core Facility, INSERM US23/CNRS UMS3655, Gustave Roussy Cancer Campus, Villejuif, France
| | - Salem Chouaib
- INSERM U1186, Villejuif, France.,Gustave Roussy Cancer Campus, Villejuif, France.,University Paris Sud, Faculty of Medicine, Le Kremlin Bicêtre, France.,Thumbay Research Institute of Precision Medicine, Gulf Medical University, Ajman, United Arab Emirates
| | - Jerome Thiery
- INSERM U1186, Villejuif, France. .,Gustave Roussy Cancer Campus, Villejuif, France. .,University Paris Sud, Faculty of Medicine, Le Kremlin Bicêtre, France.
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8
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Granzyme B Disrupts Central Metabolism and Protein Synthesis in Bacteria to Promote an Immune Cell Death Program. Cell 2017; 171:1125-1137.e11. [PMID: 29107333 DOI: 10.1016/j.cell.2017.10.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 08/23/2017] [Accepted: 09/30/2017] [Indexed: 01/17/2023]
Abstract
Human cytotoxic lymphocytes kill intracellular microbes. The cytotoxic granule granzyme proteases released by cytotoxic lymphocytes trigger oxidative bacterial death by disrupting electron transport, generating superoxide anion and inactivating bacterial oxidative defenses. However, they also cause non-oxidative cell death because anaerobic bacteria are also killed. Here, we use differential proteomics to identify granzyme B substrates in three unrelated bacteria: Escherichia coli, Listeria monocytogenes, and Mycobacteria tuberculosis. Granzyme B cleaves a highly conserved set of proteins in all three bacteria, which function in vital biosynthetic and metabolic pathways that are critical for bacterial survival under diverse environmental conditions. Key proteins required for protein synthesis, folding, and degradation are also substrates, including multiple aminoacyl tRNA synthetases, ribosomal proteins, protein chaperones, and the Clp system. Because killer cells use a multipronged strategy to target vital pathways, bacteria may not easily become resistant to killer cell attack.
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