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Yu L, Liu P. cGAS/STING signalling pathway in senescence and oncogenesis. Semin Cancer Biol 2024; 106-107:87-102. [PMID: 39222763 DOI: 10.1016/j.semcancer.2024.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2024] [Revised: 08/25/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024]
Abstract
The cGAS/STING signaling pathway is a crucial component of the innate immune system, playing significant roles in sensing cytosolic DNA, regulating cellular senescence, and contributing to oncogenesis. Recent advances have shed new lights into the molecular mechanisms governing pathway activation in multiple pathophysiological settings, the indispensable roles of cGAS/STING signaling in cellular senescence, and its context-dependent roles in cancer development and suppression. This review summarizes current knowledge related to the biology of cGAS/STING signaling pathway and its participations into senescence and oncogenesis. We further explore the clinical implications and therapeutic potential for cGAS/STING targeted therapies, and faced challenges in the field. With a focus on molecular mechanisms and emerging pharmacological targets, this review underscores the importance of future studies to harness the therapeutic potential of the cGAS/STING pathway in treating senescence-related disorders and cancer. Advanced understanding of the regulatory mechanisms of cGAS/STING signaling, along with the associated deregulations in diseases, combined with the development of new classes of cGAS/STING modulators, hold great promises for creating novel and effective therapeutic strategies. These advancements could address current treatment challenges and unlock the full potential of cGAS/STING in treating senescence-related disorders and oncogenesis.
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Affiliation(s)
- Le Yu
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Biochemistry and Biophysics, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Pengda Liu
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Biochemistry and Biophysics, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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2
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Mardjuki R, Wang S, Carozza J, Zirak B, Subramanyam V, Abhiraman G, Lyu X, Goodarzi H, Li L. Identification of the extracellular membrane protein ENPP3 as a major cGAMP hydrolase and innate immune checkpoint. Cell Rep 2024; 43:114209. [PMID: 38749434 DOI: 10.1016/j.celrep.2024.114209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/05/2024] [Accepted: 04/23/2024] [Indexed: 05/28/2024] Open
Abstract
2'3'-Cyclic guanosine monophosphate (GMP)-AMP (cGAMP) is a second messenger synthesized upon detection of cytosolic double-stranded DNA (dsDNA) and passed between cells to facilitate downstream immune signaling. Ectonucleotide pyrophosphatase phosphodiesterase I (ENPP1), an extracellular enzyme, was the only metazoan hydrolase known to regulate cGAMP levels to dampen anti-cancer immunity. Here, we uncover ENPP3 as the second and likely the only other metazoan cGAMP hydrolase under homeostatic conditions. ENPP3 has a tissue expression pattern distinct from ENPP1's and accounts for all cGAMP hydrolysis activity in ENPP1-deficient mice. Importantly, we also show that, as with ENPP1, selectively abolishing ENPP3's cGAMP hydrolysis activity results in diminished cancer growth and metastasis of certain tumor types in a stimulator of interferon genes (STING)-dependent manner. Both ENPP1 and ENPP3 are extracellular enzymes, suggesting the dominant role that extracellular cGAMP must play as a mediator of cell-cell innate immune communication. Our work demonstrates that ENPP1 and ENPP3 non-redundantly dampen extracellular cGAMP-STING signaling, pointing to ENPP3 as a target for cancer immunotherapy.
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Affiliation(s)
- Rachel Mardjuki
- Department of Biochemistry, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Arc Institute, Palo Alto, CA 94304, USA; Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Songnan Wang
- Department of Biochemistry, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Arc Institute, Palo Alto, CA 94304, USA
| | | | - Bahar Zirak
- Arc Institute, Palo Alto, CA 94304, USA; Department of Urology, University of California, San Francisco, San Francisco, CA 94143, USA; Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94158, USA; Department of Biophysics & Biochemistry, University of California, San Francisco, San Francisco, CA 94143, USA; Baker Computational Health Science Institute, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Vishvak Subramanyam
- Arc Institute, Palo Alto, CA 94304, USA; Department of Urology, University of California, San Francisco, San Francisco, CA 94143, USA; Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94158, USA; Department of Biophysics & Biochemistry, University of California, San Francisco, San Francisco, CA 94143, USA; Baker Computational Health Science Institute, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Gita Abhiraman
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | - Xuchao Lyu
- ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Department of Pathology, Stanford University, Stanford, CA 94305, USA
| | - Hani Goodarzi
- Arc Institute, Palo Alto, CA 94304, USA; Department of Urology, University of California, San Francisco, San Francisco, CA 94143, USA; Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94158, USA; Department of Biophysics & Biochemistry, University of California, San Francisco, San Francisco, CA 94143, USA; Baker Computational Health Science Institute, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Lingyin Li
- Department of Biochemistry, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Arc Institute, Palo Alto, CA 94304, USA.
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3
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Hong W, Zhang Y, Wang S, Li Z, Zheng D, Hsu S, Zhou J, Fan J, Chen Z, Xia X, Zeng Z, Gao Q, Yu M, Du S. RECQL4 Inhibits Radiation-Induced Tumor Immune Awakening via Suppressing the cGAS-STING Pathway in Hepatocellular Carcinoma. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308009. [PMID: 38381090 DOI: 10.1002/advs.202308009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/29/2023] [Indexed: 02/22/2024]
Abstract
Many patients with hepatocellular carcinoma (HCC) respond poorly to radiotherapy despite remarkable advances in treatment. A deeper insight into the mechanism of sensitivity of HCC to this therapy is urgently required. It is demonstrated that RECQL4 is upregulated in the malignant cells of patients with HCC. Elevated RECQL4 levels reduce the sensitivity of HCC to radiotherapy by repairing radiation-induced double-stranded DNA (dsDNA) fragments. Mechanistically, the inhibitory effect of RECQL4 on radiotherapy is due to the reduced recruitment of dendritic cells and CD8+ T cells in the tumor microenvironment (TME). RECQL4 disrupts the radiation-induced transformation of the TME into a tumoricidal niche by inhibiting the cGAS-STING pathway in dendritic cells. Knocking out STING in dendritic cells can block the impact of RECQL4 on HCC radiosensitivity. Notably, high RECQL4 expressions in HCC is significantly associated with poor prognosis in multiple independent cohorts. In conclusion, this study highlights how HCC-derived RECQL4 disrupts cGAS-STING pathway activation in dendritic cells through DNA repair, thus reducing the radiosensitivity of HCC. These findings provide new perspectives on the clinical treatment of HCC.
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Affiliation(s)
- Weifeng Hong
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Yang Zhang
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Siwei Wang
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Zongjuan Li
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, 200000, China
| | - Danxue Zheng
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Shujung Hsu
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Jian Zhou
- Department of Liver Surgery and Transplantation, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Jia Fan
- Department of Liver Surgery and Transplantation, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Zhesheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences; Institute for Biotechnology, St. John's University, Queens, New York, NY10003, USA
| | - Xiaojun Xia
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Zhaochong Zeng
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Qiang Gao
- Department of Liver Surgery and Transplantation, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
| | - Min Yu
- Department of Pancreas Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Southern Medical University, Guangzhou, Guangdong, 510000, China
| | - Shisuo Du
- Department of Radiation Oncology, Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200000, China
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Mardjuki R, Wang S, Carozza JA, Abhiraman GC, Lyu X, Li L. Identification of extracellular membrane protein ENPP3 as a major cGAMP hydrolase, cementing cGAMP's role as an immunotransmitter. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.12.575449. [PMID: 38260585 PMCID: PMC10802559 DOI: 10.1101/2024.01.12.575449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
cGAMP is a second messenger that is synthesized in the cytosol upon detection of cytosolic dsDNA and passed between cells to facilitate downstream immune signaling. ENPP1, an extracellular enzyme, was the only metazoan cGAMP hydrolase known to regulate cGAMP levels to dampen anti-cancer immunity. Here, we uncover ENPP3 as the second and only other metazoan cGAMP hydrolase under homeostatic conditions. ENPP3 has a tissue expression pattern distinct from that of ENPP1 and accounts for all remaining cGAMP hydrolysis activity in mice lacking ENPP1. Importantly, we also show that as with ENPP1, selectively abolishing ENPP3's cGAMP hydrolase activity results in diminished cancer growth and metastasis of certain tumor types. Both ENPP1 and ENPP3 are extracellular enzymes, suggesting the dominant role that extracellular cGAMP must play as a mediator of cell-cell innate immune communication. Our work clearly shows that ENPP1 and ENPP3 non-redundantly dampen extracellular cGAMP-STING signaling, pointing to ENPP3 as a new target for cancer immunotherapy.
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5
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Wobma H, Shin DS, Chou J, Dedeoğlu F. Dysregulation of the cGAS-STING Pathway in Monogenic Autoinflammation and Lupus. Front Immunol 2022; 13:905109. [PMID: 35693769 PMCID: PMC9186411 DOI: 10.3389/fimmu.2022.905109] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 05/02/2022] [Indexed: 01/19/2023] Open
Abstract
One of the oldest mechanisms of immune defense against pathogens is through detection of foreign DNA. Since human DNA is compartmentalized into the nucleus, its presence in the cytosol heralds a potential threat. The cGAS-STING pathway is one of the most important cytosolic DNA sensing pathways and leads to interferon signaling, inflammasome activation, autophagy, and cell death. While STING signaling is protective at physiologic levels, chronic activation of this pathway can instead drive autoinflammation and autoimmunity. Here we discuss several monogenic disorders of the STING pathway that highlight its impact on both innate and adaptive immunity in the progressive loss of tolerance. The potential relevance of STING signaling in systemic lupus erythematosus is then discussed with a focus on future avenues for monitoring and targeting this pathway.
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Second Messenger 2'3'-cyclic GMP-AMP (2'3'-cGAMP):Synthesis, transmission, and degradation. Biochem Pharmacol 2022; 198:114934. [PMID: 35104477 DOI: 10.1016/j.bcp.2022.114934] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 01/07/2023]
Abstract
Cyclic GMP-AMP synthase (cGAS) senses foreign DNA to produce 2'3'-cyclic GMP-AMP (2'3'-cGAMP). 2'3'-cGAMP is a second messenger that binds and activates the adaptor protein STING, which triggers the innate immune response. As a STING agonist, the small molecule 2'3'-cGAMP plays pivotal roles in antiviral defense and has adjuvant applications, and anti-tumor effects. 2'3'-cGAMP and its analogs are thus putative targets for immunotherapy and are currently being testedin clinical trials to treat solid tumors. However, several barriers to further development have emerged from these studies, such as evidence of immune and inflammatory side-effects, poor pharmacokinetics, and undesirable biodistribution. Here, we review the status of 2'3'-cGAMP research and outline the role of 2'3'-cGAMP in immune signaling, adjuvant applications, and cancer immunotherapy, as well as various 2'3'-cGAMP detection methods.
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7
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Cao X, Cordova AF, Li L. Therapeutic Interventions Targeting Innate Immune Receptors: A Balancing Act. Chem Rev 2021; 122:3414-3458. [PMID: 34870969 DOI: 10.1021/acs.chemrev.1c00716] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The innate immune system is an organism's first line of defense against an onslaught of internal and external threats. The downstream adaptive immune system has been a popular target for therapeutic intervention, while there is a relative paucity of therapeutics targeting the innate immune system. However, the innate immune system plays a critical role in many human diseases, such as microbial infection, cancer, and autoimmunity, highlighting the need for ongoing therapeutic research. In this review, we discuss the major innate immune pathways and detail the molecular strategies underpinning successful therapeutics targeting each pathway as well as previous and ongoing efforts. We will also discuss any recent discoveries that could inform the development of novel therapeutic strategies. As our understanding of the innate immune system continues to develop, we envision that therapies harnessing the power of the innate immune system will become the mainstay of treatment for a wide variety of human diseases.
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8
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Verrier ER, Langevin C. Cyclic Guanosine Monophosphate-Adenosine Monophosphate Synthase (cGAS), a Multifaceted Platform of Intracellular DNA Sensing. Front Immunol 2021; 12:637399. [PMID: 33708225 PMCID: PMC7940176 DOI: 10.3389/fimmu.2021.637399] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/28/2021] [Indexed: 12/17/2022] Open
Abstract
Innate immune pathways are the first line of cellular defense against pathogen infections ranging from bacteria to Metazoa. These pathways are activated following the recognition of pathogen associated molecular patterns (PAMPs) by membrane and cytosolic pattern recognition receptors. In addition, some of these cellular sensors can also recognize endogenous danger-associated molecular patterns (DAMPs) arising from damaged or dying cells and triggering innate immune responses. Among the cytosolic nucleic acid sensors, the cyclic guanosine monophosphate–adenosine monophosphate (cGAMP) synthase (cGAS) plays an essential role in the activation of the type I interferon (IFNs) response and the production of pro-inflammatory cytokines. Indeed, upon nucleic acid binding, cGAS synthesizes cGAMP, a second messenger mediating the activation of the STING signaling pathway. The functional conservation of the cGAS-STING pathway during evolution highlights its importance in host cellular surveillance against pathogen infections. Apart from their functions in immunity, cGAS and STING also play major roles in nuclear functions and tumor development. Therefore, cGAS-STING is now considered as an attractive target to identify novel biomarkers and design therapeutics for auto-inflammatory and autoimmune disorders as well as infectious diseases and cancer. Here, we review the current knowledge about the structure of cGAS and the evolution from bacteria to Metazoa and present its main functions in defense against pathogens and cancer, in connection with STING. The advantages and limitations of in vivo models relevant for studying the cGAS-STING pathway will be discussed for the notion of species specificity and in the context of their integration into therapeutic screening assays targeting cGAG and/or STING.
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Affiliation(s)
- Eloi R Verrier
- Université de Strasbourg, Inserm, Institut de Recherche sur les Maladies Virales et Hépatiques UMR_S1110, Strasbourg, France
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Karanja CW, Yeboah KS, Ong WWS, Sintim HO. A STING-based fluorescent polarization assay for monitoring activities of cyclic dinucleotide metabolizing enzymes. RSC Chem Biol 2021; 2:206-214. [PMID: 34458783 PMCID: PMC8341399 DOI: 10.1039/d0cb00187b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 11/29/2020] [Indexed: 12/17/2022] Open
Abstract
Cyclic dinucleoties, such as cGAMP, c-di-GMP and c-di-AMP, are fascinating second messengers with diverse roles in both prokaryotes and eukaryotes. Consequently there is a need for simple and inexpensive methods for profiling these compounds in biological media, monitoring their synthesis or degradation by enzymes and for identifying inhibitors of proteins that metabolize or bind to these dinucleotides. Since 2011, when we reported the first simple method to detect c-di-GMP (S. Nakayama, I. Kelsey, J. Wang, K. Roelofs, B. Stefane, Y. Luo, V. T. Lee and H. O. Sintim, J. Am. Chem. Soc., 2011, 133, 4856) or in 2014 when we revealed another surprisingly simple assay to detect c-di-AMP (J. Zhou, D. A. Sayre, Y. Zheng, H. Szmacinski and H. O. Sintim, Anal. Chem., 2014, 86, 2412), there have been efforts to develop assays to detect cyclic dinucleotides by others. However a unified and simple assay, which can be used for all cyclic dinucleotides is lacking. Here, we investigate STING binding by various fluorescein-labeled c-di-GMP, c-di-AMP and cGAMP, using fluorescent polarization (FP). Fluorescein-labeled c-di-GMP (F-c-di-GMP) was found to be the best binder of STING. This probe could be displaced by unlabeled cGAMP, c-di-AMP or c-di-GMP and hence it is a universal probe, which can be used to monitor all three dinucleotides. HPLC analysis was used to validate the new F-c-di-GMP-based FP assay.
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Affiliation(s)
- Caroline W Karanja
- Department of Chemistry 560 Oval Drive West Lafayette Indiana 47907-2084 USA
| | - Kofi S Yeboah
- Department of Chemistry 560 Oval Drive West Lafayette Indiana 47907-2084 USA
| | - Wilson W S Ong
- Department of Chemistry 560 Oval Drive West Lafayette Indiana 47907-2084 USA
| | - Herman O Sintim
- Department of Chemistry 560 Oval Drive West Lafayette Indiana 47907-2084 USA
- Institute for Drug Discovery, Purdue University 720 Clinic Drive West Lafayette IN 47907 USA
- Purdue Institute of Inflammation, Immunology, and Infectious Disease West Lafayette IN 47907 USA
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10
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Lu C, Guan J, Lu S, Jin Q, Rousseau B, Lu T, Stephens D, Zhang H, Zhu J, Yang M, Ren Z, Liang Y, Liu Z, Han C, Liu L, Cao X, Zhang A, Qiao J, Batten K, Chen M, Castrillon DH, Wang T, Li B, Diaz LA, Li GM, Fu YX. DNA Sensing in Mismatch Repair-Deficient Tumor Cells Is Essential for Anti-tumor Immunity. Cancer Cell 2021; 39:96-108.e6. [PMID: 33338425 PMCID: PMC9477183 DOI: 10.1016/j.ccell.2020.11.006] [Citation(s) in RCA: 163] [Impact Index Per Article: 54.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/23/2020] [Accepted: 11/13/2020] [Indexed: 12/21/2022]
Abstract
Increased neoantigens in hypermutated cancers with DNA mismatch repair deficiency (dMMR) are proposed as the major contributor to the high objective response rate in anti-PD-1 therapy. However, the mechanism of drug resistance is not fully understood. Using tumor models defective in the MMR gene Mlh1 (dMLH1), we show that dMLH1 tumor cells accumulate cytosolic DNA and produce IFN-β in a cGAS-STING-dependent manner, which renders dMLH1 tumors slowly progressive and highly sensitive to checkpoint blockade. In neoantigen-fixed models, dMLH1 tumors potently induce T cell priming and lose resistance to checkpoint therapy independent of tumor mutational burden. Accordingly, loss of STING or cGAS in tumor cells decreases tumor infiltration of T cells and endows resistance to checkpoint blockade. Clinically, downregulation of cGAS/STING in human dMMR cancers correlates with poor prognosis. We conclude that DNA sensing within tumor cells is essential for dMMR-triggered anti-tumor immunity. This study provides new mechanisms and biomarkers for anti-dMMR-cancer immunotherapy.
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Affiliation(s)
- Changzheng Lu
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Junhong Guan
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Steve Lu
- Ludwig Center and Howard Hughes Medical Institute at Johns Hopkins, Baltimore, MD 21287, USA
| | - Qihuang Jin
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Benoit Rousseau
- Department of Medicine, Division of Solid Tumors, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Tianshi Lu
- Quantitative Biomedical Research Center, Department of Population and Data Sciences, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Dennis Stephens
- Department of Medicine, Division of Solid Tumors, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Hongyi Zhang
- Lyda Hill Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jiankun Zhu
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Mingming Yang
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zhenhua Ren
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yong Liang
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zhida Liu
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chuanhui Han
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Longchao Liu
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Xuezhi Cao
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Anli Zhang
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jian Qiao
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Kimberly Batten
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Mingyi Chen
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Diego H Castrillon
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA; Department of Obstetrics and Gynecology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tao Wang
- Quantitative Biomedical Research Center, Department of Population and Data Sciences, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Bo Li
- Lyda Hill Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Luis A Diaz
- Department of Medicine, Division of Solid Tumors, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Guo-Min Li
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Yang-Xin Fu
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA.
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11
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Chen C, Liu Y, Cui B. Effect of radiotherapy on T cell and PD-1 / PD-L1 blocking therapy in tumor microenvironment. Hum Vaccin Immunother 2021; 17:1555-1567. [PMID: 33428533 DOI: 10.1080/21645515.2020.1840254] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Cancer is a worldwide problem that threatens human health. Radiotherapy plays an important role in a variety of cancer treatment methods. The administration of radiotherapy can alter the differentiation pathways and functions of T cells, which in turn improves the immune response of T cells. Radiotherapy can also induce up-regulation of PD-L1 expression, which means that it has great potential for enhancing the therapeutic effect of anti-PD-1/PD-L1 inhibitors and reducing the risk of drug resistance toward them. At present, the combination of radiotherapy and anti-PD-1/PD-L1 inhibitors has shown significant therapeutic effects in clinical tumor research. This review focuses on the mechanism of radiotherapy on T cells reported in recent years, as well as related research progress in the application of PD-1/PD-L1 blockers. It will provide a theoretical basis for the rational clinical application of radiotherapy combined with PD-1/PD-L1 inhibitors.
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Affiliation(s)
- Chen Chen
- Department of Colorectal Surgery, The Tumor Hospital of Harbin Medical University, Harbin, Heilongjiang Province, P. R. China
| | - Yanlong Liu
- Department of Colorectal Surgery, The Tumor Hospital of Harbin Medical University, Harbin, Heilongjiang Province, P. R. China
| | - Binbin Cui
- Department of Colorectal Surgery, The Tumor Hospital of Harbin Medical University, Harbin, Heilongjiang Province, P. R. China
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12
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Kumar M, Lowery RG. Development of a High-Throughput Assay to Identify Inhibitors of ENPP1. SLAS DISCOVERY 2021; 26:740-746. [PMID: 33402044 DOI: 10.1177/2472555220982321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The innate immune response to cancer is initiated by cytosolic DNA, where it binds to cGAS and triggers type I interferon (IFN) expression via the STING receptor, leading to activation of tumor-specific T cells. Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) has been identified as the primary enzyme responsible for degrading cGAMP, and therefore it is under intense investigation as a therapeutic target for cancer immunotherapy. ENPP1 hydrolyzes cGAMP to produce AMP and GMP, and hydrolyzes ATP and other nucleotides to monophosphates and pyrophosphate. We developed a robust, high-throughput screening (HTS)-compatible enzymatic assay method for ENPP1 using the Transcreener AMP2/GMP2 Assay, a competitive fluorescence polarization (FP) immunoassay that enables direct detection of AMP and GMP in a homogenous format. The monoclonal antibody used in the Transcreener AMP2/GMP2 Assay showed more than 104-fold selectivity for AMP and GMP versus cGAMP, and 3000-fold selectivity for AMP over ATP, indicating that the assay can be used for detection at initial velocity with either substrate. A working concentration of 100 pM ENPP1 was determined as optimal with a 60 min reaction period, enabling screening with very low quantities of enzyme. A Z' value of 0.72 was determined using ATP as substrate, indicating a high-quality assay. Consistent with previous studies, we found that ENPP1 preferred ATP as a substrate when compared with other nucleotides like GTP, ADP, and GDP. ENPP1 showed a 20-fold selectivity for 2'3'cGAMP compared with 2'3'c-diGMP and showed no activity with 3'3'c-diAMP. The Transcreener AMP2/GMP2 Assay should prove to be a valuable tool for the discovery of ENPP1 lead molecules.
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Zaver SA, Pollock AJ, Boradia VM, Woodward JJ. A Luminescence-Based Coupled Enzyme Assay Enables High-Throughput Quantification of the Bacterial Second Messenger 3'3'-Cyclic-Di-AMP. Chembiochem 2020; 22:1030-1041. [PMID: 33142009 DOI: 10.1002/cbic.202000667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/02/2020] [Indexed: 11/12/2022]
Abstract
Cyclic dinucleotide signaling systems, which are found ubiquitously throughout nature, allow organisms to rapidly and dynamically sense and respond to alterations in their environments. In recent years, the second messenger, cyclic di-(3',5')-adenosine monophosphate (c-di-AMP), has been identified as an essential signaling molecule in a diverse array of bacterial genera. We and others have shown that defects in c-di-AMP homeostasis result in severe physiological defects and virulence attenuation in many bacterial species. Despite significant advancements in the field, there is still a major gap in the understanding of the environmental and cellular factors that influence c-di-AMP dynamics due to a lack of tools to sensitively and rapidly monitor changes in c-di-AMP levels. To address this limitation, we describe here the development of a luciferase-based coupled enzyme assay that leverages the cyclic nucleotide phosphodiesterase, CnpB, for the sensitive and high-throughput quantification of 3'3'-c-di-AMP. We also demonstrate the utility of this approach for the quantification of the cyclic oligonucleotide-based anti-phage signaling system (CBASS) effector, 3'3'-cGAMP. These findings establish CDA-Luc as a more affordable and sensitive alternative to conventional c-di-AMP detection tools with broad utility for the study of bacterial cyclic dinucleotide physiology.
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Affiliation(s)
- Shivam A Zaver
- Department of Microbiology, University of Washington, 98195, Seattle, WA, USA
| | - Alex J Pollock
- Department of Microbiology, University of Washington, 98195, Seattle, WA, USA
| | | | - Joshua J Woodward
- Department of Microbiology, University of Washington, 98195, Seattle, WA, USA
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14
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Hertzog J, Rehwinkel J. Regulation and inhibition of the DNA sensor cGAS. EMBO Rep 2020; 21:e51345. [PMID: 33155371 PMCID: PMC7726805 DOI: 10.15252/embr.202051345] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/01/2020] [Accepted: 10/14/2020] [Indexed: 12/13/2022] Open
Abstract
Cell-autonomous sensing of nucleic acids is essential for host defence against invading pathogens by inducing antiviral and inflammatory cytokines. cGAS has emerged in recent years as a non-redundant DNA sensor important for detection of many viruses and bacteria. Upon binding to DNA, cGAS synthesises the cyclic dinucleotide 2'3'-cGAMP that binds to the adaptor protein STING and thereby triggers IRF3- and NFκB-dependent transcription. In addition to infection, the pathophysiology of an ever-increasing number of sterile inflammatory conditions in humans involves the recognition of DNA through cGAS. Consequently, the cGAS/STING signalling axis has emerged as an attractive target for pharmacological modulation. However, the development of cGAS and STING inhibitors has just begun and a need for specific and effective compounds persists. In this review, we focus on cGAS and explore how its activation by immunostimulatory DNA is regulated by cellular mechanisms, viral immune modulators and small molecules. We further use our knowledge of cGAS modulation by cells and viruses to conceptualise potential new ways of pharmacological cGAS targeting.
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Affiliation(s)
- Jonny Hertzog
- MRC Human Immunology UnitMRC Weatherall Institute of Molecular MedicineRadcliffe Department of MedicineUniversity of OxfordOxfordUK
| | - Jan Rehwinkel
- MRC Human Immunology UnitMRC Weatherall Institute of Molecular MedicineRadcliffe Department of MedicineUniversity of OxfordOxfordUK
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15
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Carozza JA, Brown JA, Böhnert V, Fernandez D, AlSaif Y, Mardjuki RE, Smith M, Li L. Structure-Aided Development of Small-Molecule Inhibitors of ENPP1, the Extracellular Phosphodiesterase of the Immunotransmitter cGAMP. Cell Chem Biol 2020; 27:1347-1358.e5. [PMID: 32726585 PMCID: PMC7680421 DOI: 10.1016/j.chembiol.2020.07.007] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/28/2020] [Accepted: 07/08/2020] [Indexed: 11/23/2022]
Abstract
Cancer cells initiate an innate immune response by synthesizing and exporting the small-molecule immunotransmitter cGAMP, which activates the anti-cancer Stimulator of Interferon Genes (STING) pathway in the host. An extracellular enzyme, ectonucleotide pyrophosphatase phosphodiesterase 1 (ENPP1), hydrolyzes cGAMP and negatively regulates this anti-cancer immune response. Small-molecule ENPP1 inhibitors are much needed as tools to study the basic biology of extracellular cGAMP and as investigational cancer immunotherapy drugs. Here, we surveyed structure-activity relationships around a series of cell-impermeable and thus extracellular-targeting phosphonate inhibitors of ENPP1. In addition, we solved the crystal structure of an exemplary phosphonate inhibitor to elucidate the interactions that drive potency. This study yielded several best-in-class inhibitors with Ki < 2 nM and excellent physicochemical and pharmacokinetic properties. Finally, we demonstrate that an ENPP1 inhibitor delays tumor growth in a breast cancer mouse model. Together, we have developed ENPP1 inhibitors that are excellent tool compounds and potential therapeutics.
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MESH Headings
- Animals
- Antineoplastic Agents/chemical synthesis
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/pharmacology
- Cell Survival/drug effects
- Cells, Cultured
- Dose-Response Relationship, Drug
- Drug Screening Assays, Antitumor
- Enzyme Inhibitors/chemical synthesis
- Enzyme Inhibitors/chemistry
- Enzyme Inhibitors/pharmacology
- Female
- Humans
- Mice
- Mice, Inbred C57BL
- Molecular Structure
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Neurotransmitter Agents/chemistry
- Neurotransmitter Agents/isolation & purification
- Neurotransmitter Agents/metabolism
- Nucleotides, Cyclic/chemistry
- Nucleotides, Cyclic/isolation & purification
- Nucleotides, Cyclic/metabolism
- Phosphoric Diester Hydrolases/metabolism
- Pyrophosphatases/antagonists & inhibitors
- Pyrophosphatases/metabolism
- Small Molecule Libraries/chemical synthesis
- Small Molecule Libraries/chemistry
- Small Molecule Libraries/pharmacology
- Structure-Activity Relationship
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Affiliation(s)
- Jacqueline A Carozza
- Department of Chemistry, Stanford University, Stanford, CA 93405, USA; Stanford ChEM-H, Stanford University, Stanford, CA 93405, USA
| | - Jenifer A Brown
- Stanford ChEM-H, Stanford University, Stanford, CA 93405, USA; Biophysics Program, Stanford University, Stanford, CA 93405, USA
| | - Volker Böhnert
- Stanford ChEM-H, Stanford University, Stanford, CA 93405, USA; Department of Biochemistry, Stanford University, Stanford, CA 93405, USA
| | - Daniel Fernandez
- Stanford ChEM-H Macromolecular Structure Knowledge Center, Stanford University, Stanford, CA 93405, USA
| | - Yasmeen AlSaif
- Stanford ChEM-H, Stanford University, Stanford, CA 93405, USA; Department of Biology, Stanford University, Stanford, CA 93405, USA
| | - Rachel E Mardjuki
- Department of Chemistry, Stanford University, Stanford, CA 93405, USA; Stanford ChEM-H, Stanford University, Stanford, CA 93405, USA
| | - Mark Smith
- Stanford ChEM-H Medicinal Chemistry Knowledge Center, Stanford, CA 93405, USA
| | - Lingyin Li
- Stanford ChEM-H, Stanford University, Stanford, CA 93405, USA; Department of Biochemistry, Stanford University, Stanford, CA 93405, USA.
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16
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LRRC8A:C/E Heteromeric Channels Are Ubiquitous Transporters of cGAMP. Mol Cell 2020; 80:578-591.e5. [PMID: 33171122 DOI: 10.1016/j.molcel.2020.10.021] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/20/2020] [Accepted: 10/13/2020] [Indexed: 02/07/2023]
Abstract
Extracellular 2'3'-cyclic-GMP-AMP (cGAMP) is an immunotransmitter exported by diseased cells and imported into host cells to activate the innate immune STING pathway. We previously identified SLC19A1 as a cGAMP importer, but its use across human cell lines is limited. Here, we identify LRRC8A heteromeric channels, better known as volume-regulated anion channels (VRAC), as widely expressed cGAMP transporters. LRRC8A forms complexes with LRRC8C and/or LRRC8E, depending on their expression levels, to transport cGAMP and other 2'3'-cyclic dinucleotides. In contrast, LRRC8D inhibits cGAMP transport. We demonstrate that cGAMP is effluxed or influxed via LRRC8 channels, as dictated by the cGAMP electrochemical gradient. Activation of LRRC8A channels, which can occur under diverse stresses, strongly potentiates cGAMP transport. We identify activator sphingosine 1-phosphate and inhibitor DCPIB as chemical tools to manipulate channel-mediated cGAMP transport. Finally, LRRC8A channels are key cGAMP transporters in resting primary human vasculature cells and universal human cGAMP transporters when activated.
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17
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Pollock AJ, Zaver SA, Woodward JJ. A STING-based biosensor affords broad cyclic dinucleotide detection within single living eukaryotic cells. Nat Commun 2020; 11:3533. [PMID: 32669552 PMCID: PMC7363834 DOI: 10.1038/s41467-020-17228-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 06/11/2020] [Indexed: 01/08/2023] Open
Abstract
Cyclic dinucleotides (CDNs) are second messengers conserved across all three domains of life. Within eukaryotes they mediate protective roles in innate immunity against malignant, viral, and bacterial disease, and exert pathological effects in autoimmune disorders. Despite their ubiquitous role in diverse biological contexts, CDN detection methods are limited. Here, using structure guided design of the murine STING CDN binding domain, we engineer a Förster resonance energy transfer (FRET) based biosensor deemed BioSTING. Recombinant BioSTING affords real-time detection of CDN synthase activity and inhibition. Expression of BioSTING in live human cells allows quantification of localized bacterial and eukaryotic CDN levels in single cells with low nanomolar sensitivity. These findings establish BioSTING as a powerful kinetic in vitro platform amenable to high throughput screens and as a broadly applicable cellular tool to interrogate the temporal and spatial dynamics of CDN signaling in a variety of infectious, malignant, and autoimmune contexts.
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Affiliation(s)
- Alex J Pollock
- Department of Microbiology, University of Washington, Seattle, WA, 98195, USA
| | - Shivam A Zaver
- Department of Microbiology, University of Washington, Seattle, WA, 98195, USA
| | - Joshua J Woodward
- Department of Microbiology, University of Washington, Seattle, WA, 98195, USA.
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