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He M, Jiang H, Li S, Xue M, Wang H, Zheng C, Tong J. The crosstalk between DNA-damage responses and innate immunity. Int Immunopharmacol 2024; 140:112768. [PMID: 39088918 DOI: 10.1016/j.intimp.2024.112768] [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: 05/20/2024] [Revised: 07/14/2024] [Accepted: 07/22/2024] [Indexed: 08/03/2024]
Abstract
DNA damage is typically caused during cell growth by DNA replication stress or exposure to endogenous or external toxins. The accumulation of damaged DNA causes genomic instability, which is the root cause of many serious disorders. Multiple cellular organisms utilize sophisticated signaling pathways against DNA damage, collectively known as DNA damage response (DDR) networks. Innate immune responses are activated following cellular abnormalities, including DNA damage. Interestingly, recent studies have indicated that there is an intimate relationship between the DDR network and innate immune responses. Diverse kinds of cytosolic DNA sensors, such as cGAS and STING, recognize damaged DNA and induce signals related to innate immune responses, which link defective DDR to innate immunity. Moreover, DDR components operate in immune signaling pathways to induce IFNs and/or a cascade of inflammatory cytokines via direct interactions with innate immune modulators. Consistently, defective DDR factors exacerbate the innate immune imbalance, resulting in severe diseases, including autoimmune disorders and tumorigenesis. Here, the latest progress in understanding crosstalk between the DDR network and innate immune responses is reviewed. Notably, the dual function of innate immune modulators in the DDR network may provide novel insights into understanding and developing targeted immunotherapies for DNA damage-related diseases, even carcinomas.
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Affiliation(s)
- Mei He
- College of Life Sciences, Hebei University, Baoding 071002, China; Institute of Life Science and Green Development, Hebei University, Baoding 071002, China
| | - Hua Jiang
- Department of Hematology, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200000, China
| | - Shun Li
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu 610041, China
| | - Mengzhou Xue
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450001, China.
| | - Huiqing Wang
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China.
| | - Chunfu Zheng
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada.
| | - Jie Tong
- College of Life Sciences, Hebei University, Baoding 071002, China.
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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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3
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Zhang JN, Dong MM, Cao W, Chen HG, Gu HY, Feng YL, Zhang EF, He JS, Liu SC, Xie AY, Cai Z. Disruption of DNA-PKcs-mediated cGAS retention on damaged chromatin potentiates DNA damage-inducing agent-induced anti-multiple myeloma activity. Br J Cancer 2024; 131:430-443. [PMID: 38877108 PMCID: PMC11300664 DOI: 10.1038/s41416-024-02742-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 05/21/2024] [Accepted: 05/28/2024] [Indexed: 06/16/2024] Open
Abstract
BACKGROUND Targeting DNA damage repair factors, such as DNA-dependent protein kinase catalytic subunit (DNA-PKcs), may offer an opportunity for effective treatment of multiple myeloma (MM). In combination with DNA damage-inducing agents, this strategy has been shown to improve chemotherapies partially via activation of cGAS-STING pathway by an elevated level of cytosolic DNA. However, as cGAS is primarily sequestered by chromatin in the nucleus, it remains unclear how cGAS is released from chromatin and translocated into the cytoplasm upon DNA damage, leading to cGAS-STING activation. METHODS We examined the role of DNA-PKcs inhibition on cGAS-STING-mediated MM chemosensitivity by performing mass spectrometry and mechanism study. RESULTS Here, we found DNA-PKcs inhibition potentiated DNA damage-inducing agent doxorubicin-induced anti-MM effect by activating cGAS-STING signaling. The cGAS-STING activation in MM cells caused cell death partly via IRF3-NOXA-BAK axis and induced M1 polarization of macrophages. Moreover, this activation was not caused by defective classical non-homologous end joining (c-NHEJ). Instead, upon DNA damage induced by doxorubicin, inhibition of DNA-PKcs promoted cGAS release from cytoplasmic chromatin fragments and increased the amount of cytosolic cGAS and DNA, activating cGAS-STING. CONCLUSIONS Inhibition of DNA-PKcs could improve the efficacy of doxorubicin in treatment of MM by de-sequestrating cGAS in damaged chromatin.
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Affiliation(s)
- Jin-Na Zhang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, Hangzhou, Zhejiang, China
| | - Meng-Meng Dong
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, Hangzhou, Zhejiang, China
| | - Wen Cao
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hao-Guang Chen
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hui-Yao Gu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yi-Li Feng
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, Hangzhou, Zhejiang, China
- Key Laboratory of Laparoscopic Technology of Zhejiang Province, Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Hangzhou Qiantang Hospital, Hangzhou, Zhejiang, China
| | - En-Fan Zhang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jing-Song He
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Si-Cheng Liu
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, Hangzhou, Zhejiang, China
- Key Laboratory of Laparoscopic Technology of Zhejiang Province, Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Hangzhou Qiantang Hospital, Hangzhou, Zhejiang, China
| | - An-Yong Xie
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, Hangzhou, Zhejiang, China.
- Key Laboratory of Laparoscopic Technology of Zhejiang Province, Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
- Hangzhou Qiantang Hospital, Hangzhou, Zhejiang, China.
| | - Zhen Cai
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
- Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China.
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Cuddy SR, Flores ME, Krakowiak PA, Whitford AL, Dochnal SA, Babnis A, Miyake T, Tigano M, Engel DA, Cliffe AR. Co-option of mitochondrial nucleic acid sensing pathways by HSV-1 UL12.5 for reactivation from latent Infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.06.601241. [PMID: 39005440 PMCID: PMC11245091 DOI: 10.1101/2024.07.06.601241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Although viruses subvert innate immune pathways for their replication, there is evidence they can also co-opt anti-viral responses for their benefit. The ubiquitous human pathogen, Herpes Simplex Virus-1 (HSV-1), encodes a protein (UL12.5) that induces the release of mitochondrial nucleic acid into the cytosol, which activates immune sensing pathways and reduces productive replication in non-neuronal cells. HSV-1 establishes latency in neurons and can reactivate to cause disease. We found that UL12.5 is required for HSV-1 reactivation in neurons and acts to directly promote viral lytic gene expression during initial exit from latency. Further, the direct activation of innate immune sensing pathways triggered HSV reactivation and compensated for a lack of UL12.5. Finally, we found that the induction of HSV-1 lytic genes during reactivation required intact RNA and DNA sensing pathways, demonstrating that HSV-1 can both respond to and active antiviral nucleic acid sensing pathways to reactivate from a latent infection.
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Affiliation(s)
- Sean R. Cuddy
- Neuroscience Graduate Program, University of Virginia, Charlottesville, VA, 22908
| | - Matthew E. Flores
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Patryk A. Krakowiak
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Abigail L. Whitford
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Sara A. Dochnal
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Aleksandra Babnis
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Tsuyoshi Miyake
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Marco Tigano
- Department of Pathology and Genomic Medicine, Thomas Jefferson University, 1020 Locust Street, Philadelphia 19107
| | - Daniel A. Engel
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
| | - Anna. R Cliffe
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA, 22908
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Tian B, Tian Y, Wang X, Cai D, Wu L, Wang M, Jia R, Chen S, Zhu D, Liu M, Yang Q, Wu Y, Zhao X, Zhang S, Sun D, Huang J, Ou X, Wu Z, Cheng A. Duck STING mediates antiviral autophagy directing the interferon signaling pathway to inhibit duck plague virus infection. Vet Res 2024; 55:83. [PMID: 38943190 PMCID: PMC11214240 DOI: 10.1186/s13567-024-01338-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 04/02/2024] [Indexed: 07/01/2024] Open
Abstract
Migratory birds are important vectors for virus transmission, how migratory birds recognize viruses and viruses are sustained in birds is still enigmatic. As an animal model for waterfowl among migratory birds, studying and dissecting the antiviral immunity and viral evasion in duck cells may pave a path to deciphering these puzzles. Here, we studied the mechanism of antiviral autophagy mediated by duck STING in DEF cells. The results collaborated that duck STING could significantly enhance LC3B-II/I turnover, LC3B-EGFP puncta formation, and mCherry/EGFP ratio, indicating that duck STING could induce autophagy. The autophagy induced by duck STING is not affected by shRNA knockdown of ATG5 expression, deletion of the C-terminal tail of STING, or TBK1 inhibitor BX795 treatment, indicating that duck STING activated non-classical selective autophagy is independent of interaction with TBK1, TBK1 phosphorylation, and interferon (IFN) signaling. The STING R235A mutant and Sar1A/B kinase mutant abolished duck STING induced autophagy, suggesting binding with cGAMP and COPII complex mediated transport are the critical prerequisite. Duck STING interacted with LC3B through LIR motifs to induce autophagy, the LIR 4/7 motif mutants of duck STING abolished the interaction with LC3B, and neither activated autophagy nor IFN expression, indicating that duck STING associates with LC3B directed autophagy and dictated innate immunity activation. Finally, we found that duck STING mediated autophagy significantly inhibited duck plague virus (DPV) infection via ubiquitously degraded viral proteins. Our study may shed light on one scenario about the control and evasion of diseases transmitted by migratory birds.
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Affiliation(s)
- Bin Tian
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Yanming Tian
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Xuetong Wang
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Dongjie Cai
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Liping Wu
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Mingshu Wang
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Renyong Jia
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Shun Chen
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Dekang Zhu
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Mafeng Liu
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Qiao Yang
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Ying Wu
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Xinxin Zhao
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Shaqiu Zhang
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Di Sun
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Juan Huang
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Xumin Ou
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Zhen Wu
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Anchun Cheng
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People's Republic of China, Chengdu, 611130, China.
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.
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Zhou Z, Huang S, Fan F, Xu Y, Moore C, Li S, Han C. The multiple faces of cGAS-STING in antitumor immunity: prospects and challenges. MEDICAL REVIEW (2021) 2024; 4:173-191. [PMID: 38919400 PMCID: PMC11195429 DOI: 10.1515/mr-2023-0061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 03/28/2024] [Indexed: 06/27/2024]
Abstract
As a key sensor of double-stranded DNA (dsDNA), cyclic GMP-AMP synthase (cGAS) detects cytosolic dsDNA and initiates the synthesis of 2'3' cyclic GMP-AMP (cGAMP) that activates the stimulator of interferon genes (STING). This finally promotes the production of type I interferons (IFN-I) that is crucial for bridging innate and adaptive immunity. Recent evidence show that several antitumor therapies, including radiotherapy (RT), chemotherapy, targeted therapies and immunotherapies, activate the cGAS-STING pathway to provoke the antitumor immunity. In the last decade, the development of STING agonists has been a major focus in both basic research and the pharmaceutical industry. However, up to now, none of STING agonists have been approved for clinical use. Considering the broad expression of STING in whole body and the direct lethal effect of STING agonists on immune cells in the draining lymph node (dLN), research on the optimal way to activate STING in tumor microenvironment (TME) appears to be a promising direction. Moreover, besides enhancing IFN-I signaling, the cGAS-STING pathway also plays roles in senescence, autophagy, apoptosis, mitotic arrest, and DNA repair, contributing to tumor development and metastasis. In this review, we summarize the recent advances on cGAS-STING pathway's response to antitumor therapies and the strategies involving this pathway for tumor treatment.
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Affiliation(s)
- Zheqi Zhou
- Peking University International Cancer Institute, Peking University Cancer Hospital and Institute, Health Science Center, Peking University, Beijing, China
| | - Sanling Huang
- Peking University International Cancer Institute, Peking University Cancer Hospital and Institute, Health Science Center, Peking University, Beijing, China
| | - Fangying Fan
- Department of Interventional Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Yan Xu
- Peking University International Cancer Institute, Peking University Cancer Hospital and Institute, Health Science Center, Peking University, Beijing, China
| | - Casey Moore
- Departments of Immunology, Pathology, UT Southwestern Medical Center, Dallas, Texas, USA
| | - Sirui Li
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Chuanhui Han
- Peking University International Cancer Institute, Peking University Cancer Hospital and Institute, Health Science Center, Peking University, Beijing, China
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7
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Wang MM, Zhao Y, Liu J, Fan RR, Tang YQ, Guo ZY, Li T. The role of the cGAS-STING signaling pathway in viral infections, inflammatory and autoimmune diseases. Acta Pharmacol Sin 2024:10.1038/s41401-023-01185-5. [PMID: 38822084 DOI: 10.1038/s41401-023-01185-5] [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: 08/06/2023] [Accepted: 10/18/2023] [Indexed: 06/02/2024] Open
Abstract
Pattern recognition receptors are an essential part of the immune system, which detect pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs) and help shape both innate and adaptive immune responses. When dsDNA is present, cyclic GMP-AMP Synthase (cGAS) produces a second messenger called cyclic GMP-AMP (cGAMP), which then triggers an adaptor protein called STING, and eventually activates the expression of type I interferon (IFN) and pro-inflammatory cytokines in immune cells. The cGAS-STING signaling pathway has been receiving a lot of attention lately as a key immune-surveillance mediator. In this review, we summarize the present circumstances of the cGAS-STING signaling pathway in viral infections and inflammatory diseases, as well as autoimmune diseases. Modulation of the cGAS-STING signaling pathway provides potential strategies for treating viral infections, inflammatory diseases, and autoimmune diseases.
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Affiliation(s)
- Ming-Ming Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao, 999078, China
| | - Yue Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao, 999078, China
| | - Juan Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao, 999078, China
| | - Rong-Rong Fan
- Department of Biosciences and Nutrition, Karolinska Institute, Huddinge, 14183, Sweden
| | - Yan-Qing Tang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao, 999078, China
| | - Zheng-Yang Guo
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao, 999078, China
| | - Ting Li
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao, 999078, China.
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8
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Li L. Stimulating STING for cancer therapy: Taking the extracellular route. Cell Chem Biol 2024; 31:851-861. [PMID: 38723635 DOI: 10.1016/j.chembiol.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/14/2024] [Accepted: 04/09/2024] [Indexed: 05/19/2024]
Abstract
Ten years ago, the second messenger cGAMP was discovered as the activator of the anti-cancer STING pathway. The characterization of cGAMP's paracrine action and dominant extracellular hydrolase ENPP1 cemented cGAMP as an intercellular immunotransmitter that coordinates the innate and adaptive immune systems to fight cancer. In this Perspective, I look back at a decade of discovery of extracellular cGAMP biology and drug development aiming to supply or preserve extracellular cGAMP for cancer treatment. Reviewing our understanding of the cell type-specific regulatory mechanisms of STING agonists, including their transporters and degradation enzymes, I explain on a molecular and cellular level the successes and challenges of direct STING agonists for cancer therapy. Based on what we know now, I propose new ways to stimulate the STING pathway in a manner that is not only cancer specific, but also cell type specific to fully harness the anti-cancer effect of cGAMP while avoiding collateral damage.
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Affiliation(s)
- Lingyin Li
- Arc Institute, Palo Alto, CA, 94304 USA; Department of Biochemistry and Sarafan ChEM-H Institute, Stanford University, Stanford, CA, 94305 USA.
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Dvorkin S, Cambier S, Volkman HE, Stetson DB. New frontiers in the cGAS-STING intracellular DNA-sensing pathway. Immunity 2024; 57:718-730. [PMID: 38599167 PMCID: PMC11013568 DOI: 10.1016/j.immuni.2024.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/26/2024] [Accepted: 02/28/2024] [Indexed: 04/12/2024]
Abstract
The cGAS-STING intracellular DNA-sensing pathway has emerged as a key element of innate antiviral immunity and a promising therapeutic target. The existence of an innate immune sensor that can be activated by any double-stranded DNA (dsDNA) of any origin raises fundamental questions about how cGAS is regulated and how it responds to "foreign" DNA while maintaining tolerance to ubiquitous self-DNA. In this review, we summarize recent evidence implicating important roles for cGAS in the detection of foreign and self-DNA. We describe two recent and surprising insights into cGAS-STING biology: that cGAS is tightly tethered to the nucleosome and that the cGAMP product of cGAS is an immunotransmitter acting at a distance to control innate immunity. We consider how these advances influence our understanding of the emerging roles of cGAS in the DNA damage response (DDR), senescence, aging, and cancer biology. Finally, we describe emerging approaches to harness cGAS-STING biology for therapeutic benefit.
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Affiliation(s)
- Steve Dvorkin
- Departments of Immunology and Medicine, University of Washington School of Medicine, Seattle, WA 98109, USA
| | - Stephanie Cambier
- Departments of Immunology and Medicine, University of Washington School of Medicine, Seattle, WA 98109, USA
| | - Hannah E Volkman
- Departments of Immunology and Medicine, University of Washington School of Medicine, Seattle, WA 98109, USA
| | - Daniel B Stetson
- Departments of Immunology and Medicine, University of Washington School of Medicine, Seattle, WA 98109, USA.
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10
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Wenzl SJ, de Oliveira Mann CC. How enzyme-centered approaches are advancing research on cyclic oligo-nucleotides. FEBS Lett 2024; 598:839-863. [PMID: 38453162 DOI: 10.1002/1873-3468.14838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 03/09/2024]
Abstract
Cyclic nucleotides are the most diversified category of second messengers and are found in all organisms modulating diverse pathways. While cAMP and cGMP have been studied over 50 years, cyclic di-nucleotide signaling in eukaryotes emerged only recently with the anti-viral molecule 2´3´cGAMP. Recent breakthrough discoveries have revealed not only the astonishing chemical diversity of cyclic nucleotides but also surprisingly deep-rooted evolutionary origins of cyclic oligo-nucleotide signaling pathways and structural conservation of the proteins involved in their synthesis and signaling. Here we discuss how enzyme-centered approaches have paved the way for the identification of several cyclic nucleotide signals, focusing on the advantages and challenges associated with deciphering the activation mechanisms of such enzymes.
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Affiliation(s)
- Simon J Wenzl
- Department of Bioscience, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Carina C de Oliveira Mann
- Department of Bioscience, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany
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11
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Sato Y, Hayashi MT. Micronucleus is not a potent inducer of the cGAS/STING pathway. Life Sci Alliance 2024; 7:e202302424. [PMID: 38307626 PMCID: PMC10837050 DOI: 10.26508/lsa.202302424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 01/22/2024] [Accepted: 01/22/2024] [Indexed: 02/04/2024] Open
Abstract
Micronuclei (MN) have been associated with the innate immune response. The abrupt rupture of MN membranes results in the accumulation of cGAS, potentially activating STING and downstream interferon-responsive genes. However, direct evidence connecting MN and cGAS activation has been lacking. We have developed the FuVis2 reporter system, which enables the visualization of the cell nucleus carrying a single sister chromatid fusion and, consequently, MN. Using this FuVis2 reporter equipped with cGAS and STING reporters, we rigorously assessed the potency of cGAS activation by MN in individual living cells. Our findings reveal that cGAS localization to membrane-ruptured MN during interphase is infrequent, with cGAS primarily capturing MN during mitosis and remaining bound to cytosolic chromatin. We found that cGAS accumulation during mitosis neither activates STING in the subsequent interphase nor triggers the interferon response. Gamma-ray irradiation activates STING independently of MN formation and cGAS localization to MN. These results suggest that cGAS accumulation in cytosolic MN is not a robust indicator of its activation and that MN are not the primary trigger of the cGAS/STING pathway.
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Affiliation(s)
- Yuki Sato
- https://ror.org/02kpeqv85 Graduate School of Biostudies, Kyoto University, Kyoto, Japan
- https://ror.org/02kpeqv85 IFOM-KU Joint Research Laboratory, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Makoto T Hayashi
- https://ror.org/02kpeqv85 IFOM-KU Joint Research Laboratory, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- IFOM ETS, the AIRC Institute of Molecular Oncology, Milan, Italy
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12
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Lu Y, Zhao M, Chen L, Wang Y, Liu T, Liu H. cGAS: action in the nucleus. Front Immunol 2024; 15:1380517. [PMID: 38515746 PMCID: PMC10954897 DOI: 10.3389/fimmu.2024.1380517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 02/23/2024] [Indexed: 03/23/2024] Open
Abstract
As a canonical cytoplasmic DNA sensor, cyclic GMP-AMP synthase (cGAS) plays a key role in innate immunity. In recent years, a growing number of studies have shown that cGAS can also be located in the nucleus and plays new functions such as regulating DNA damage repair, nuclear membrane repair, chromosome fusion, DNA replication, angiogenesis and other non-canonical functions. Meanwhile, the mechanisms underlying the nucleo-cytoplasmic transport and the regulation of cGAS activation have been revealed in recent years. Based on the current understanding of the structure, subcellular localization and canonical functions of cGAS, this review focuses on summarizing the mechanisms underlying nucleo-cytoplasmic transport, activity regulation and non-canonical functions of cGAS in the nucleus. We aim to provide insights into exploring the new functions of cGAS in the nucleus and advance its clinical translation.
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Affiliation(s)
- Yikai Lu
- Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Mengmeng Zhao
- Research Center of Translational Medicine, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Li Chen
- Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yan Wang
- Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Tianhao Liu
- Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Haipeng Liu
- Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
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13
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Kumar V, Stewart JH. cGLRs Join Their Cousins of Pattern Recognition Receptor Family to Regulate Immune Homeostasis. Int J Mol Sci 2024; 25:1828. [PMID: 38339107 PMCID: PMC10855445 DOI: 10.3390/ijms25031828] [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: 12/08/2023] [Revised: 01/05/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024] Open
Abstract
Pattern recognition receptors (PRRs) recognize danger signals such as PAMPs/MAMPs and DAMPs to initiate a protective immune response. TLRs, NLRs, CLRs, and RLRs are well-characterized PRRs of the host immune system. cGLRs have been recently identified as PRRs. In humans, the cGAS/STING signaling pathway is a part of cGLRs. cGAS recognizes cytosolic dsDNA as a PAMP or DAMP to initiate the STING-dependent immune response comprising type 1 IFN release, NF-κB activation, autophagy, and cellular senescence. The present article discusses the emergence of cGLRs as critical PRRs and how they regulate immune responses. We examined the role of cGAS/STING signaling, a well-studied cGLR system, in the activation of the immune system. The following sections discuss the role of cGAS/STING dysregulation in disease and how immune cross-talk with other PRRs maintains immune homeostasis. This understanding will lead to the design of better vaccines and immunotherapeutics for various diseases, including infections, autoimmunity, and cancers.
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Affiliation(s)
- Vijay Kumar
- Laboratory of Tumor Immunology and Immunotherapy, Department of Surgery, Morehouse School of Medicine, Atlanta, GA 30310, USA;
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14
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Luan X, Wang L, Song G, Zhou W. Innate immune responses to RNA: sensing and signaling. Front Immunol 2024; 15:1287940. [PMID: 38343534 PMCID: PMC10854198 DOI: 10.3389/fimmu.2024.1287940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/11/2024] [Indexed: 02/15/2024] Open
Abstract
Nucleic acids are among the most essential PAMPs (pathogen-associated molecular patterns). Animals have evolved numerous sensors to recognize nucleic acids and trigger immune signaling against pathogen replication, cellular stress and cancer. Many sensor proteins (e.g., cGAS, AIM2, and TLR9) recognize the molecular signature of infection or stress and are responsible for the innate immune response to DNA. Remarkably, recent evidence demonstrates that cGAS-like receptors acquire the ability to sense RNA in some forms of life. Compared with the nucleic-acid sensing by cGAS, innate immune responses to RNA are based on various RNA sensors, including RIG-I, MDA5, ADAR1, TLR3/7/8, OAS1, PKR, NLRP1/6, and ZBP1, via a broad-spectrum signaling axis. Importantly, new advances have brought to light the potential clinical application of targeting these signaling pathways. Here, we highlight the latest discoveries in the field. We also summarize the activation and regulatory mechanisms of RNA-sensing signaling. In addition, we discuss how RNA sensing is tightly controlled in cells and why the disruption of immune homeostasis is linked to disease.
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Affiliation(s)
- Xiaohan Luan
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Southern University of Science and Technology, Shenzhen, Guangdong, China
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Lei Wang
- Department of Systems Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Guangji Song
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Wen Zhou
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Southern University of Science and Technology, Shenzhen, Guangdong, China
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
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15
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Zierhut C. Potential cGAS-STING pathway functions in DNA damage responses, DNA replication and DNA repair. DNA Repair (Amst) 2024; 133:103608. [PMID: 38056369 DOI: 10.1016/j.dnarep.2023.103608] [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: 09/05/2023] [Revised: 11/06/2023] [Accepted: 11/21/2023] [Indexed: 12/08/2023]
Abstract
The major innate immune responder to the DNA of pathogens is the cyclic GMP-AMP (cGAMP) synthase (cGAS) - stimulator of interferon genes (STING) pathway. Most prominently, the outcome of cGAS signalling is the activation of inflammatory transcription through interferon regulatory factor 3 (IRF3) and nuclear factor kappa B (NF-kB). In addition, the cGAS-STING pathway can lead to the direct modulation of cellular processes independently of transcription, such as activation of autophagy. Under unperturbed conditions, several mechanisms are in place to prevent the activation of cGAS by self-DNA, chiefly its sequestration on chromatin, which interferes with binding to stimulatory DNA. However, under conditions of genotoxic stress and chromosomal instability, this inhibition breaks down, resulting in the activation of cGAS, which drives sterile inflammation, as well as cell fate and immune responses in cancer. Recently, several studies have suggested that cGAS, STING, or downstream pathway components can also regulate the DNA damage response, DNA damage checkpoint signalling, DNA repair and DNA replication. Here, I review these proposed mechanisms, and discuss some unanswered questions relating to them.
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Affiliation(s)
- Christian Zierhut
- The Institute of Cancer Research, Division of Cancer Biology, 237 Fulham Road, London SW3 6JB, UK.
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16
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Cho MG, Kumar RJ, Lin CC, Boyer JA, Shahir JA, Fagan-Solis K, Simpson DA, Fan C, Foster CE, Goddard AM, Lerner LM, Ellington SW, Wang Q, Wang Y, Ho AY, Liu P, Perou CM, Zhang Q, McGinty RK, Purvis JE, Gupta GP. MRE11 liberates cGAS from nucleosome sequestration during tumorigenesis. Nature 2024; 625:585-592. [PMID: 38200309 PMCID: PMC10794148 DOI: 10.1038/s41586-023-06889-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 11/22/2023] [Indexed: 01/12/2024]
Abstract
Oncogene-induced replication stress generates endogenous DNA damage that activates cGAS-STING-mediated signalling and tumour suppression1-3. However, the precise mechanism of cGAS activation by endogenous DNA damage remains enigmatic, particularly given that high-affinity histone acidic patch (AP) binding constitutively inhibits cGAS by sterically hindering its activation by double-stranded DNA (dsDNA)4-10. Here we report that the DNA double-strand break sensor MRE11 suppresses mammary tumorigenesis through a pivotal role in regulating cGAS activation. We demonstrate that binding of the MRE11-RAD50-NBN complex to nucleosome fragments is necessary to displace cGAS from acidic-patch-mediated sequestration, which enables its mobilization and activation by dsDNA. MRE11 is therefore essential for cGAS activation in response to oncogenic stress, cytosolic dsDNA and ionizing radiation. Furthermore, MRE11-dependent cGAS activation promotes ZBP1-RIPK3-MLKL-mediated necroptosis, which is essential to suppress oncogenic proliferation and breast tumorigenesis. Notably, downregulation of ZBP1 in human triple-negative breast cancer is associated with increased genome instability, immune suppression and poor patient prognosis. These findings establish MRE11 as a crucial mediator that links DNA damage and cGAS activation, resulting in tumour suppression through ZBP1-dependent necroptosis.
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Affiliation(s)
- Min-Guk Cho
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Rashmi J Kumar
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- UNC MD-PhD Program, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - Chien-Chu Lin
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Joshua A Boyer
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jamshaid A Shahir
- Curriculum in Bioinformatics and Computational Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Katerina Fagan-Solis
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Dennis A Simpson
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Cheng Fan
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christine E Foster
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Anna M Goddard
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Lynn M Lerner
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Simon W Ellington
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Qinhong Wang
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Ying Wang
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Alice Y Ho
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA, USA
| | - Pengda Liu
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Charles M Perou
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Computational Medicine Program, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Qi Zhang
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Robert K McGinty
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jeremy E Purvis
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Computational Medicine Program, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Gaorav P Gupta
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- UNC MD-PhD Program, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA.
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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17
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Ha CT, Tageldein MM, Harding SM. The entanglement of DNA damage and pattern recognition receptor signaling. DNA Repair (Amst) 2024; 133:103595. [PMID: 37988925 DOI: 10.1016/j.dnarep.2023.103595] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/05/2023] [Accepted: 11/09/2023] [Indexed: 11/23/2023]
Abstract
Cells are under constant pressure to suppress DNA damage originating from both exogenous and endogenous sources. Cellular responses to DNA damage help to prevent mutagenesis and cell death that arises when DNA damage is either left unrepaired or repaired inaccurately. During the "acute phase" of DNA damage signaling, lesions are recognized, processed, and repaired to restore the primary DNA sequence whilst cell cycle checkpoints delay mitotic progression, cell death and the propagation of errors to daughter cells. Increasingly, there is recognition of a "chronic phase" of DNA damage signaling, exemplified by the secretion of dozens of cytokines days after the inciting damage event. In this review, we focus on the cellular origin of these chronic responses, the molecular pathways that control them and the increasing appreciation for the interconnection between acute and chronic DNA damage responses.
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Affiliation(s)
- Cindy T Ha
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Maha M Tageldein
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Shane M Harding
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada; Princess Margaret Cancer Center, University Health Network, Toronto, ON, Canada; Departments of Radiation Oncology and Immunology, University of Toronto, Toronto, ON, Canada.
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18
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Jiang H, Chan YW. Chromatin bridges: stochastic breakage or regulated resolution? Trends Genet 2024; 40:69-82. [PMID: 37891096 DOI: 10.1016/j.tig.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/25/2023] [Accepted: 10/03/2023] [Indexed: 10/29/2023]
Abstract
Genetic material is organized in the form of chromosomes, which need to be segregated accurately into two daughter cells in each cell cycle. However, chromosome fusion or the presence of unresolved interchromosomal linkages lead to the formation of chromatin bridges, which can induce DNA lesions and genome instability. Persistent chromatin bridges are trapped in the cleavage furrow and are broken at or after abscission, the final step of cytokinesis. In this review, we focus on recent progress in understanding the mechanism of bridge breakage and resolution. We discuss the molecular machinery and enzymes that have been implicated in the breakage and processing of bridge DNA. In addition, we outline both the immediate outcomes and genomic consequences induced by bridge breakage.
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Affiliation(s)
- Huadong Jiang
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region of China
| | - Ying Wai Chan
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region of China.
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19
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Monticelli S, Cejka P. DNA sensing and repair systems unexpectedly team up against cancer. Nature 2024; 625:457-458. [PMID: 38200334 DOI: 10.1038/d41586-023-03994-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
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20
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Chen W, Lee GE, Jeung D, Byun J, Juan W, Cho YY. Cyclic GMP-AMP Synthase in Cancer Prevention. J Cancer Prev 2023; 28:143-196. [PMID: 38205362 PMCID: PMC10774482 DOI: 10.15430/jcp.2023.28.4.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
Cyclic GMP-AMP (cGAMP), synthesized by cGAMP synthase (cGAS), serves as a secondary messenger that modulates various cellular processes, including cell proliferation, cell death, immune response, and inflammation. cGAS is activated upon detecting cytoplasmic DNA, which may originate from damaged genomic and mitochondrial DNA or from viral and bacterial infections. The presence of DNA in the cytoplasm can trigger a substantial inflammatory reaction and cytokine production via the cGAS-STING signaling pathway. Consequently, specific inhibitors targeting this pathway hold significant potential as chemopreventive agents. In this review, we explore the potential effectiveness of modulating cGAS activity. We discuss the role of cGAMP, the mechanism of action for distinguishing between self and foreign DNA, and the possible functions of cGAS within the nucleus.
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Affiliation(s)
- Weidong Chen
- BK21-Four, College of Pharmacy, The Catholic University of Korea
- RCD Control Material Research Institute, The Catholic University of Korea, Bucheon, Korea
| | - Ga-Eun Lee
- BK21-Four, College of Pharmacy, The Catholic University of Korea
- RCD Control Material Research Institute, The Catholic University of Korea, Bucheon, Korea
| | - Dohyun Jeung
- BK21-Four, College of Pharmacy, The Catholic University of Korea
- RCD Control Material Research Institute, The Catholic University of Korea, Bucheon, Korea
| | - Jiin Byun
- BK21-Four, College of Pharmacy, The Catholic University of Korea
- RCD Control Material Research Institute, The Catholic University of Korea, Bucheon, Korea
| | - Wu Juan
- BK21-Four, College of Pharmacy, The Catholic University of Korea
- RCD Control Material Research Institute, The Catholic University of Korea, Bucheon, Korea
| | - Yong-Yeon Cho
- BK21-Four, College of Pharmacy, The Catholic University of Korea
- RCD Control Material Research Institute, The Catholic University of Korea, Bucheon, Korea
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21
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Hao W, Li W, Wang L, Li S. The odyssey of cGAS: From cytosol to nucleus. Cytokine Growth Factor Rev 2023; 74:29-39. [PMID: 37778920 DOI: 10.1016/j.cytogfr.2023.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
The cyclic GMP-AMP synthase (cGAS) is a widely recognized pattern recognition receptor responsible for detecting pathogenic DNA in the cytosol and inducing the production of type I interferon (IFN) to combat infections. The recently discovered nuclear localization of cGAS has changed the old dogma, illuminated a captivating dimension of innate immunity, and sparked many fundamental questions beyond the field of immunology. This review explores cGAS nuclear localization models, activation mechanisms, and biological significance. This expansion challenges the conventional understanding of cGAS and opens new avenues for scientific exploration, promising insights into cellular surveillance and potentially unveiling new therapeutic targets for immune disorders.
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Affiliation(s)
- Wenzhuo Hao
- Department of Microbiology and Immunology, Tulane University, New Orleans, LA 70112, USA
| | - Wenjun Li
- Department of Craniofacial Biomedicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Lingyan Wang
- Department of Microbiology and Immunology, Tulane University, New Orleans, LA 70112, USA.
| | - Shitao Li
- Department of Microbiology and Immunology, Tulane University, New Orleans, LA 70112, USA.
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22
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Koutná E, Lux V, Kouba T, Škerlová J, Nováček J, Srb P, Hexnerová R, Šváchová H, Kukačka Z, Novák P, Fábry M, Poepsel S, Veverka V. Multivalency of nucleosome recognition by LEDGF. Nucleic Acids Res 2023; 51:10011-10025. [PMID: 37615563 PMCID: PMC10570030 DOI: 10.1093/nar/gkad674] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 07/01/2023] [Accepted: 08/09/2023] [Indexed: 08/25/2023] Open
Abstract
Eukaryotic transcription is dependent on specific histone modifications. Their recognition by chromatin readers triggers complex processes relying on the coordinated association of transcription regulatory factors. Although various modification states of a particular histone residue often lead to differential outcomes, it is not entirely clear how they are discriminated. Moreover, the contribution of intrinsically disordered regions outside of the specialized reader domains to nucleosome binding remains unexplored. Here, we report the structures of a PWWP domain from transcriptional coactivator LEDGF in complex with the H3K36 di- and trimethylated nucleosome, indicating that both methylation marks are recognized by PWWP in a highly conserved manner. We identify a unique secondary interaction site for the PWWP domain at the interface between the acidic patch and nucleosomal DNA that might contribute to an H3K36-methylation independent role of LEDGF. We reveal DNA interacting motifs in the intrinsically disordered region of LEDGF that discriminate between the intra- or extranucleosomal DNA but remain dynamic in the context of dinucleosomes. The interplay between the LEDGF H3K36-methylation reader and protein binding module mediated by multivalent interactions of the intrinsically disordered linker with chromatin might help direct the elongation machinery to the vicinity of RNA polymerase II, thereby facilitating productive elongation.
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Affiliation(s)
- Eliška Koutná
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
- Department of Cell Biology, Faculty of Science, Charles University, Prague 128 00, Czech Republic
| | - Vanda Lux
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | - Tomáš Kouba
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | - Jana Škerlová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | | | - Pavel Srb
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | - Rozálie Hexnerová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | - Hana Šváchová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | - Zdeněk Kukačka
- Institute of Microbiology of the Czech Academy of Sciences, Prague 142 20, Czech Republic
| | - Petr Novák
- Institute of Microbiology of the Czech Academy of Sciences, Prague 142 20, Czech Republic
| | - Milan Fábry
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
| | - Simon Poepsel
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, Cologne 509 31, Germany
- Cologne Excellence Cluster for Cellular Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne 509 31, Germany
| | - Václav Veverka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 160 00, Czech Republic
- Department of Cell Biology, Faculty of Science, Charles University, Prague 128 00, Czech Republic
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23
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Zheng W, Chen N, Meurens F, Zheng W, Zhu J. How Does cGAS Avoid Sensing Self-DNA under Normal Physiological Conditions? Int J Mol Sci 2023; 24:14738. [PMID: 37834184 PMCID: PMC10572901 DOI: 10.3390/ijms241914738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/22/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
cGAS is a cytosolic DNA sensor that activates innate immune responses by producing the second messenger 2'3'-cGAMP, which activates the adaptor STING. cGAS senses dsDNA in a length-dependent but sequence-independent manner, meaning it cannot discriminate self-DNA from foreign DNA. In normal physiological conditions, cellular DNA is sequestered in the nucleus by a nuclear envelope and in mitochondria by a mitochondrial membrane. When self-DNA leaks into the cytosol during cellular stress or mitosis, the cGAS can be exposed to self-DNA and activated. Recently, many studies have investigated how cGAS keeps inactive and avoids being aberrantly activated by self-DNA. Thus, this narrative review aims to summarize the mechanisms by which cGAS avoids sensing self-DNA under normal physiological conditions.
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Affiliation(s)
- Wangli Zheng
- College Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (W.Z.); (N.C.)
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225009, China
- Comparative Medicine Research Institute, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
| | - Nanhua Chen
- College Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (W.Z.); (N.C.)
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225009, China
- Comparative Medicine Research Institute, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
| | - François Meurens
- Swine and Poultry Infectious Diseases Research Center, Faculty of Veterinary Medicine, University of Montreal, St. Hyacinthe, QC J2S 2M2, Canada;
- Department of Veterinary Microbiology and Immunology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - Wanglong Zheng
- College Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (W.Z.); (N.C.)
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225009, China
- Comparative Medicine Research Institute, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
| | - Jianzhong Zhu
- College Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (W.Z.); (N.C.)
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225009, China
- Comparative Medicine Research Institute, Yangzhou University, Yangzhou 225009, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
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24
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Slavik KM, Kranzusch PJ. CBASS to cGAS-STING: The Origins and Mechanisms of Nucleotide Second Messenger Immune Signaling. Annu Rev Virol 2023; 10:423-453. [PMID: 37380187 DOI: 10.1146/annurev-virology-111821-115636] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Host defense against viral pathogens is an essential function for all living organisms. In cell-intrinsic innate immunity, dedicated sensor proteins recognize molecular signatures of infection and communicate to downstream adaptor or effector proteins to activate immune defense. Remarkably, recent evidence demonstrates that much of the core machinery of innate immunity is shared across eukaryotic and prokaryotic domains of life. Here, we review a pioneering example of evolutionary conservation in innate immunity: the animal cGAS-STING (cyclic GMP-AMP synthase-stimulator of interferon genes) signaling pathway and its ancestor in bacteria, CBASS (cyclic nucleotide-based antiphage signaling system) antiphage defense. We discuss the unique mechanism by which animal cGLRs (cGAS-like receptors) and bacterial CD-NTases (cGAS/dinucleotide-cyclase in Vibrio (DncV)-like nucleotidyltransferases) in these pathways link pathogen detection with immune activation using nucleotide second messenger signals. Comparing the biochemical, structural, and mechanistic details of cGAS-STING, cGLR signaling, and CBASS, we highlight emerging questions in the field and examine evolutionary pressures that may have shaped the origins of nucleotide second messenger signaling in antiviral defense.
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Affiliation(s)
- Kailey M Slavik
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA;
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Philip J Kranzusch
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA;
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Parker Institute for Cancer Immunotherapy at Dana-Farber Cancer Institute, Boston, Massachusetts, USA
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25
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Chen K, Liao J, Patel DJ, Xie W. Advances in structure-guided mechanisms impacting on the cGAS-STING innate immune pathway. Adv Immunol 2023; 159:1-32. [PMID: 37996205 DOI: 10.1016/bs.ai.2023.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
The metazoan cGAS-STING innate immunity pathway is triggered in response to cytoplasmic double-stranded DNA (dsDNA), thereby providing host defense against microbial pathogens. This pathway also impacts on autoimmune diseases, cellular senescence and anti-tumor immunity. The cGAS-STING pathway was also observed in the bacterial antiviral immune response, known as the cyclic oligonucleotide (CDN)-based anti-phage signaling system (CBASS). This review highlights a structure-based mechanistic perspective of recent advances in metazoan and bacterial cGAS-STING innate immune signaling by focusing on the cGAS sensor, cGAMP second messenger and STING adaptor components, thereby elucidating the specificity, activation, regulation and signal transduction features of the pathway.
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Affiliation(s)
- Kexin Chen
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, P.R. China
| | - Jialing Liao
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, P.R. China; School of Biomedical Engineering, Hubei University of Medicine, Shiyan, Hubei, P.R. China
| | - Dinshaw J Patel
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY, United States.
| | - Wei Xie
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, P.R. China.
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26
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Fang L, Hao Y, Yu H, Gu X, Peng Q, Zhuo H, Li Y, Liu Z, Wang J, Chen Y, Zhang J, Tian H, Gao Y, Gao R, Teng H, Shan Z, Zhu J, Li Z, Liu Y, Zhang Y, Yu F, Lin Z, Hao Y, Ge X, Yuan J, Hu HG, Ma Y, Qin HL, Wang P. Methionine restriction promotes cGAS activation and chromatin untethering through demethylation to enhance antitumor immunity. Cancer Cell 2023; 41:1118-1133.e12. [PMID: 37267951 DOI: 10.1016/j.ccell.2023.05.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/08/2023] [Accepted: 05/08/2023] [Indexed: 06/04/2023]
Abstract
Cyclic GMP-AMP synthase (cGAS) is the major sensor for cytosolic DNA and activates type I interferon signaling and plays an essential role in antitumor immunity. However, it remains unclear whether the cGAS-mediated antitumor activity is affected by nutrient status. Here, our study reports that methionine deprivation enhances cGAS activity by blocking its methylation, which is catalyzed by methyltransferase SUV39H1. We further show that methylation enhances the chromatin sequestration of cGAS in a UHRF1-dependent manner. Blocking cGAS methylation enhances cGAS-mediated antitumor immunity and suppresses colorectal tumorigenesis. Clinically, cGAS methylation in human cancers correlates with poor prognosis. Thus, our results indicate that nutrient stress promotes cGAS activation via reversible methylation, and suggest a potential therapeutic strategy for targeting cGAS methylation in cancer treatment.
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Affiliation(s)
- Lan Fang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China.
| | - Yun Hao
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Haihong Yu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Xuemei Gu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Qiao Peng
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Huimin Zhuo
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Yaxu Li
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Zhiyuan Liu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Jia Wang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Yunfei Chen
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Jiawen Zhang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Hongling Tian
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Yaohui Gao
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Renyuan Gao
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Hongqi Teng
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Zezhi Shan
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Jiali Zhu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Zhiqiang Li
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Yu'e Liu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Yiyi Zhang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Fei Yu
- Institute of Nuclear Medicine, Tongji University School of Medicine, Shanghai 200072, China
| | - Zhang Lin
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200032, China
| | - Yujun Hao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200032, China
| | - Xin Ge
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Jian Yuan
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Hong-Gang Hu
- Insititute of Translational Medicine, Shanghai University, Shanghai 200433, China
| | - Yanlei Ma
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Huan-Long Qin
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China
| | - Ping Wang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Shanghai 200072, China.
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27
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Hao S, Zheng X, Zhu Y, Yao Y, Li S, Xu Y, Feng WH. African swine fever virus QP383R dampens type I interferon production by promoting cGAS palmitoylation. Front Immunol 2023; 14:1186916. [PMID: 37228597 PMCID: PMC10203406 DOI: 10.3389/fimmu.2023.1186916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 04/24/2023] [Indexed: 05/27/2023] Open
Abstract
Cyclic GMP-AMP synthase (cGAS) recognizes viral DNA and synthesizes cyclic GMP-AMP (cGAMP), which activates stimulator of interferon genes (STING/MITA) and downstream mediators to elicit an innate immune response. African swine fever virus (ASFV) proteins can antagonize host immune responses to promote its infection. Here, we identified ASFV protein QP383R as an inhibitor of cGAS. Specifically, we found that overexpression of QP383R suppressed type I interferons (IFNs) activation stimulated by dsDNA and cGAS/STING, resulting in decreased transcription of IFNβ and downstream proinflammatory cytokines. In addition, we showed that QP383R interacted directly with cGAS and promoted cGAS palmitoylation. Moreover, we demonstrated that QP383R suppressed DNA binding and cGAS dimerization, thus inhibiting cGAS enzymatic functions and reducing cGAMP production. Finally, the truncation mutation analysis indicated that the 284-383aa of QP383R inhibited IFNβ production. Considering these results collectively, we conclude that QP383R can antagonize host innate immune response to ASFV by targeting the core component cGAS in cGAS-STING signaling pathways, an important viral strategy to evade this innate immune sensor.
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Affiliation(s)
- Siyuan Hao
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Xiaojie Zheng
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yingqi Zhu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yao Yao
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Sihan Li
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yangyang Xu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Wen-hai Feng
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
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28
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Govindarajulu M, Ramesh S, Beasley M, Lynn G, Wallace C, Labeau S, Pathak S, Nadar R, Moore T, Dhanasekaran M. Role of cGAS-Sting Signaling in Alzheimer's Disease. Int J Mol Sci 2023; 24:ijms24098151. [PMID: 37175853 PMCID: PMC10179704 DOI: 10.3390/ijms24098151] [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: 12/20/2022] [Revised: 04/18/2023] [Accepted: 04/30/2023] [Indexed: 05/15/2023] Open
Abstract
There is mounting evidence that the development of Alzheimer's disease (AD) interacts extensively with immunological processes in the brain and extends beyond the neuronal compartment. Accumulation of misfolded proteins can activate an innate immune response that releases inflammatory mediators and increases the severity and course of the disease. It is widely known that type-I interferon-driven neuroinflammation in the central nervous system (CNS) accelerates the development of numerous acute and chronic CNS diseases. It is becoming better understood how the cyclic GMP-AMP synthase (cGAS) and its adaptor protein Stimulator of Interferon Genes (STING) triggers type-I IFN-mediated neuroinflammation. We discuss the principal elements of the cGAS-STING signaling pathway and the mechanisms underlying the association between cGAS-STING activity and various AD pathologies. The current understanding of beneficial and harmful cGAS-STING activity in AD and the current treatment pathways being explored will be discussed in this review. The cGAS-STING regulation offers a novel therapeutic opportunity to modulate inflammation in the CNS because it is an upstream regulator of type-I IFNs.
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Affiliation(s)
- Manoj Govindarajulu
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Sindhu Ramesh
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - McNeil Beasley
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Graham Lynn
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Caleigh Wallace
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Sammie Labeau
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Suhrud Pathak
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Rishi Nadar
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Timothy Moore
- Units Administration, Research Programs, Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, 2316 Walker Building, Auburn, AL 36849, USA
| | - Muralikrishnan Dhanasekaran
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
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29
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Fritsch LE, Kelly C, Pickrell AM. The role of STING signaling in central nervous system infection and neuroinflammatory disease. WIREs Mech Dis 2023; 15:e1597. [PMID: 36632700 PMCID: PMC10175194 DOI: 10.1002/wsbm.1597] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 11/27/2022] [Accepted: 12/21/2022] [Indexed: 01/13/2023]
Abstract
The cyclic guanosine monophosphate-adenosine monophosphate (GMP-AMP) synthase-Stimulator of Interferon Genes (cGAS-STING) pathway is a critical innate immune mechanism for detecting the presence of double-stranded DNA (dsDNA) and prompting a robust immune response. Canonical cGAS-STING activation occurs when cGAS, a predominantly cytosolic pattern recognition receptor, binds microbial DNA to promote STING activation. Upon STING activation, transcription factors enter the nucleus to cause the production of Type I interferons, inflammatory cytokines whose primary function is to prime the host for viral infection by producing a number of antiviral interferon-stimulated genes. While the pathway was originally described in viral infection, more recent studies have implicated cGAS-STING signaling in a number of different contexts, including autoimmune disease, cancer, injury, and neuroinflammatory disease. This review focuses on how our understanding of the cGAS-STING pathway has evolved over time with an emphasis on the role of STING-mediated neuroinflammation and infection in the nervous system. We discuss recent findings on how STING signaling contributes to the pathology of pain, traumatic brain injury, and stroke, as well as how mitochondrial DNA may promote STING activation in common neurodegenerative diseases. We conclude by commenting on the current knowledge gaps that should be filled before STING can be an effective therapeutic target in neuroinflammatory disease. This article is categorized under: Neurological Diseases > Molecular and Cellular Physiology Infectious Diseases > Molecular and Cellular Physiology Immune System Diseases > Molecular and Cellular Physiology.
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Affiliation(s)
- Lauren E. Fritsch
- Graduate Program in Translational Biology, Medicine, and Health, Virginia Polytechnic Institute and State University, Roanoke, Virginia, USA
| | - Colin Kelly
- Graduate Program in Translational Biology, Medicine, and Health, Virginia Polytechnic Institute and State University, Roanoke, Virginia, USA
| | - Alicia M. Pickrell
- School of Neuroscience, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
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30
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Vasiyani H, Wadhwa B, Singh R. Regulation of cGAS-STING signalling in cancer: Approach for combination therapy. Biochim Biophys Acta Rev Cancer 2023; 1878:188896. [PMID: 37088059 DOI: 10.1016/j.bbcan.2023.188896] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/11/2023] [Accepted: 04/11/2023] [Indexed: 04/25/2023]
Abstract
Innate immunity plays an important role not only during infection but also homeostatic role during stress conditions. Activation of the immune system including innate immune response plays a critical role in the initiation and progression of tumorigenesis. The innate immune sensor recognizes pathogen-associated molecular patterns (PAMPs) and activates cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) (cGAS-STING) and induces type-1 immune response during viral and bacterial infection. cGAS-STING is regulated differently in conditions like cellular senescence and DNA damage in normal and tumor cells and is implicated in the progression of tumors from different origins. cGAS binds to cytoplasmic dsDNA and synthesize cyclic GMP-AMP (2'3'-cGAMP), which selectively activates STING and downstream IFN and NF-κB activation. We here reviewed the cGAS-STING signalling pathway and its cross-talk with other pathways to modulate tumorigenesis. Further, the review also focused on emerging studies that targeted the cGAS-STING pathway for developing targeted therapeutics and combinatorial regimens for cancer of different origins.
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Affiliation(s)
- Hitesh Vasiyani
- Department of Biochemistry, The M.S. University of Baroda, Vadodara 390002, Gujarat, India
| | - Bhumika Wadhwa
- Department of Biochemistry, The M.S. University of Baroda, Vadodara 390002, Gujarat, India
| | - Rajesh Singh
- Department of Biochemistry, The M.S. University of Baroda, Vadodara 390002, Gujarat, India.
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31
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Suptela AJ, Marriott I. Cytosolic DNA sensors and glial responses to endogenous DNA. Front Immunol 2023; 14:1130172. [PMID: 36999037 PMCID: PMC10043442 DOI: 10.3389/fimmu.2023.1130172] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/13/2023] [Indexed: 03/17/2023] Open
Abstract
Genomic instability is a key driving force for the development and progression of many neurodegenerative diseases and central nervous system (CNS) cancers. The initiation of DNA damage responses is a critical step in maintaining genomic integrity and preventing such diseases. However, the absence of these responses or their inability to repair genomic or mitochondrial DNA damage resulting from insults, including ionizing radiation or oxidative stress, can lead to an accumulation of self-DNA in the cytoplasm. Resident CNS cells, such as astrocytes and microglia, are known to produce critical immune mediators following CNS infection due to the recognition of pathogen and damage-associated molecular patterns by specialized pattern recognition receptors (PRRs). Recently, multiple intracellular PRRs, including cyclic GMP-AMP synthase, interferon gamma-inducible 16, absent in melanoma 2, and Z-DNA binding protein, have been identified as cytosolic DNA sensors and to play critical roles in glial immune responses to infectious agents. Intriguingly, these nucleic acid sensors have recently been shown to recognize endogenous DNA and trigger immune responses in peripheral cell types. In the present review, we discuss the available evidence that cytosolic DNA sensors are expressed by resident CNS cells and can mediate their responses to the presence of self-DNA. Furthermore, we discuss the potential for glial DNA sensor-mediated responses to provide protection against tumorigenesis versus the initiation of potentially detrimental neuroinflammation that could initiate or foster the development of neurodegenerative disorders. Determining the mechanisms that underlie the detection of cytosolic DNA by glia and the relative role of each pathway in the context of specific CNS disorders and their stages may prove pivotal in our understanding of the pathogenesis of such conditions and might be leveraged to develop new treatment modalities.
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Affiliation(s)
| | - Ian Marriott
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, United States
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32
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Patel DJ, Yu Y, Xie W. cGAMP-activated cGAS-STING signaling: its bacterial origins and evolutionary adaptation by metazoans. Nat Struct Mol Biol 2023; 30:245-260. [PMID: 36894694 DOI: 10.1038/s41594-023-00933-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 01/31/2023] [Indexed: 03/11/2023]
Abstract
The metazoan cGAMP-activated cGAS-STING innate immunity pathway is triggered in response to genomic instability and DNA damage, thereby providing host defense against microbial pathogens. This pathway also impacts on autophagy, cellular senescence and antitumor immunity, while its overactivation triggers autoimmune and inflammatory diseases. Metazoan cGAS generates cGAMP containing distinct combinations of 3'-5' and 2'-5' linkages, which target the adaptor protein STING and activate the innate immune response through a signaling cascade leading to upregulation of cytokine and interferon production. This Review highlights a structure-based mechanistic perspective of recent advances in cGAMP-activated cGAS-STING innate immune signaling by focusing on the cGAS sensor, cGAMP second messenger and STING adaptor components, thereby elucidating the specificity, activation, regulation and signal transduction features of the pathway. In addition, the Review addresses progress towards identification of inhibitors and activators targeting cGAS and STING, as well as strategies developed by pathogens to evade cGAS-STING immunity. Most importantly, it highlights cyclic nucleotide second messengers as ancient signaling molecules that elicit a potent innate immune response that originated in bacteria and evolved through evolutionary adaptation to metazoans.
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Affiliation(s)
- Dinshaw J Patel
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
| | - You Yu
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - Wei Xie
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, China
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Mitochondrial DNA in cell death and inflammation. Biochem Soc Trans 2023; 51:457-472. [PMID: 36815695 PMCID: PMC9988000 DOI: 10.1042/bst20221525] [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: 12/12/2022] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/24/2023]
Abstract
Cytosolic DNA is recognized by the innate immune system as a potential threat. During apoptotic cell death, mitochondrial DNA (mtDNA) release activates the DNA sensor cyclic GMP-AMP synthase (cGAS) to promote a pro-inflammatory type I interferon response. Inflammation following mtDNA release during apoptotic cell death can be exploited to engage anti-tumor immunity and represents a potential avenue for cancer therapy. Additionally, various studies have described leakage of mtDNA, independent of cell death, with different underlying cues such as pathogenic infections, changes in mtDNA packaging, mtDNA stress or reduced mitochondrial clearance. The interferon response in these scenarios can be beneficial but also potentially disadvantageous, as suggested by a variety of disease phenotypes. In this review, we discuss mechanisms underlying mtDNA release governed by cell death pathways and summarize release mechanisms independent of cell death. We further highlight the similarities and differences in mtDNA release pathways, outlining gaps in our knowledge and questions for further research. Together, a deeper understanding of how and when mtDNA is released may enable the development of drugs to specifically target or inhibit mtDNA release in different disease settings.
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Du Y, Hu Z, Luo Y, Wang HY, Yu X, Wang RF. Function and regulation of cGAS-STING signaling in infectious diseases. Front Immunol 2023; 14:1130423. [PMID: 36825026 PMCID: PMC9941744 DOI: 10.3389/fimmu.2023.1130423] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 01/24/2023] [Indexed: 02/10/2023] Open
Abstract
The efficacious detection of pathogens and prompt induction of innate immune signaling serve as a crucial component of immune defense against infectious pathogens. Over the past decade, DNA-sensing receptor cyclic GMP-AMP synthase (cGAS) and its downstream signaling adaptor stimulator of interferon genes (STING) have emerged as key mediators of type I interferon (IFN) and nuclear factor-κB (NF-κB) responses in health and infection diseases. Moreover, both cGAS-STING pathway and pathogens have developed delicate strategies to resist each other for their survival. The mechanistic and functional comprehension of the interplay between cGAS-STING pathway and pathogens is opening the way for the development and application of pharmacological agonists and antagonists in the treatment of infectious diseases. Here, we briefly review the current knowledge of DNA sensing through the cGAS-STING pathway, and emphatically highlight the potent undertaking of cGAS-STING signaling pathway in the host against infectious pathogenic organisms.
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Affiliation(s)
- Yang Du
- Department of Medicine, and Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
- Research Center of Medical Sciences, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, Guangdong, China
| | - Zhiqiang Hu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Yien Luo
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, Guangdong, China
| | - Helen Y. Wang
- Department of Medicine, and Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
- Department of Pediatrics, Children’s Hospital, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
| | - Xiao Yu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Lab of Single Cell Technology and Application, Southern Medical University, Guangzhou, Guangdong, China
| | - Rong-Fu Wang
- Department of Medicine, and Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
- Department of Pediatrics, Children’s Hospital, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
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Pan J, Fei CJ, Hu Y, Wu XY, Nie L, Chen J. Current understanding of the cGAS-STING signaling pathway: Structure, regulatory mechanisms, and related diseases. Zool Res 2023; 44:183-218. [PMID: 36579404 PMCID: PMC9841179 DOI: 10.24272/j.issn.2095-8137.2022.464] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 12/27/2022] [Indexed: 01/04/2023] Open
Abstract
The innate immune system protects the host from external pathogens and internal damage in various ways. The cGAS-STING signaling pathway, comprised of cyclic GMP-AMP synthase (cGAS), stimulator of interferon genes (STING), and downstream signaling adaptors, plays an essential role in protective immune defense against microbial DNA and internal damaged-associated DNA and is responsible for various immune-related diseases. After binding with DNA, cytosolic cGAS undergoes conformational change and DNA-linked liquid-liquid phase separation to produce 2'3'-cGAMP for the activation of endoplasmic reticulum (ER)-localized STING. However, further studies revealed that cGAS is predominantly expressed in the nucleus and strictly tethered to chromatin to prevent binding with nuclear DNA, and functions differently from cytosolic-localized cGAS. Detailed delineation of this pathway, including its structure, signaling, and regulatory mechanisms, is of great significance to fully understand the diversity of cGAS-STING activation and signaling and will be of benefit for the treatment of inflammatory diseases and cancer. Here, we review recent progress on the above-mentioned perspectives of the cGAS-STING signaling pathway and discuss new avenues for further study.
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Affiliation(s)
- Jing Pan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang 315211, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, Zhejiang 315832, China
- Zhejiang Key Laboratory of Marine Bioengineering, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Chen-Jie Fei
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang 315211, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, Zhejiang 315832, China
- Zhejiang Key Laboratory of Marine Bioengineering, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Yang Hu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang 315211, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, Zhejiang 315832, China
- Zhejiang Key Laboratory of Marine Bioengineering, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Xiang-Yu Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang 315211, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, Zhejiang 315832, China
- Zhejiang Key Laboratory of Marine Bioengineering, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Li Nie
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang 315211, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, Zhejiang 315832, China
- Zhejiang Key Laboratory of Marine Bioengineering, Ningbo University, Ningbo, Zhejiang 315832, China. E-mail:
| | - Jiong Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, Zhejiang 315211, China
- Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Meishan Campus, Ningbo University, Ningbo, Zhejiang 315832, China
- Zhejiang Key Laboratory of Marine Bioengineering, Ningbo University, Ningbo, Zhejiang 315832, China. E-mail:
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36
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Lin C, Zheng M, Xiao S, Wang S, Zhu X, Chen X, Jiang D, Zeng X, Chen S, Chen S. Duck cGAS inhibits DNA and RNA virus replication by activating IFNs and antiviral ISGs. Front Immunol 2023; 14:1101335. [PMID: 36733488 PMCID: PMC9887016 DOI: 10.3389/fimmu.2023.1101335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/03/2023] [Indexed: 01/18/2023] Open
Abstract
Cyclic GMP-AMP Synthase (cGAS) is a pivotal adaptor of the signaling pathways involving the pattern recognition receptors and plays an important role in apoptosis and immune regulation. The cGAS function in mammals has been investigated extensively; however, the function of duck cGAS (du-cGAS) in response to viral infections is still unclear. This study aimed to clone the mallard (Anas platyrhynchos) cGAS homolog to investigate the function of duck cGAS (du-cGAS) in host antiviral innate immunity. The results showed that the open reading frame (ORF) region of the du-cGAS gene was 1296 bp, encoding 432 amino acids (aa) and exhibiting similar functional domains with its chicken counterpart. Knockdown of the endogenous du-cGAS by specific sgRNA strongly increased the replication of DNA viruses, including duck adenovirus B2 (DAdV B2) and duck short beak and dwarfism syndrome virus (SBDSV). However, the knockout did not impair the replication of novel duck reovirus (NDRV), an RNA virus. Furthermore, the mRNA expressions of type I interferon (IFNs) and vital interferon-stimulated genes (ISGs) were remarkably reduced in the du-cGAS knockout DEF cell line. Inversely, du-cGAS overexpression greatly activated the transcription of IFN-α, IFN-β, and vital ISGs, and impaired the replication of DAdV B2, SBDSV, and NDRV in the DEF cell line. Importantly, we found that a deletion of 68 aa in the N terminus didn't impair the antiviral function of du-cGAS. Overexpressing NTase Core, C-Domain (Mab21), or Zinc-Ribbon domain independently had no antiviral effects. Generally, these results reveal that du-cGAS is a vital component of the innate immune system of ducks, with a universal antiviral activity, and provides a useful strategy for the control of waterfowl viral diseases.
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Affiliation(s)
- Chang Lin
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China.,Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Min Zheng
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Shifeng Xiao
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Shao Wang
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Xiaoli Zhu
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Xiuqin Chen
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Dandan Jiang
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Xiancheng Zeng
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Shaoying Chen
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China
| | - Shilong Chen
- Laboratory of Animal Virology, Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, Fujian, China.,College of Life Sciences, Longyan University, Longyan, China
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37
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Song JX, Villagomes D, Zhao H, Zhu M. cGAS in nucleus: The link between immune response and DNA damage repair. Front Immunol 2022; 13:1076784. [PMID: 36591232 PMCID: PMC9797516 DOI: 10.3389/fimmu.2022.1076784] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 11/24/2022] [Indexed: 12/23/2022] Open
Abstract
As the first barrier of host defense, innate immunity sets up the parclose to keep out external microbial or virus attacks. Depending on the type of pathogens, several cytoplasm pattern recognition receptors exist to sense the attacks from either foreign or host origins, triggering the immune response to battle with the infections. Among them, cGAS-STING is the major pathway that mainly responds to microbial DNA, DNA virus infections, or self-DNA, which mainly comes from genome instability by-product or released DNA from the mitochondria. cGAS was initially found functional in the cytoplasm, although intriguing evidence indicates that cGAS exists in the nucleus where it is involved in the DNA damage repair process. Because the close connection between DNA damage response and immune response and cGAS recognizes DNA in length-dependent but DNA sequence-independent manners, it is urgent to clear the function balance of cGAS in the nucleus versus cytoplasm and how it is shielded from recognizing the host origin DNA. Here, we outline the current conception of immune response and the regulation mechanism of cGAS in the nucleus. Furthermore, we will shed light on the potential mechanisms that are restricted to be taken away from self-DNA recognition, especially how post-translational modification regulates cGAS functions.
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Affiliation(s)
- Jia-Xian Song
- Institute for Translation Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Deana Villagomes
- Department of Molecular and Cellular Biology, University of California Davis, One Shields Avenue, Davis, CA, United States
| | - Hongchang Zhao
- Department of Microbiology and Molecular Genetics, University of California Davis, One Shields Avenue, Davis, CA, United States
| | - Min Zhu
- Institute for Translation Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China,*Correspondence: Min Zhu,
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38
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Fang R, Jiang Q, Yu X, Zhao Z, Jiang Z. Recent advances in the activation and regulation of the cGAS-STING pathway. Adv Immunol 2022; 156:55-102. [PMID: 36410875 DOI: 10.1016/bs.ai.2022.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The cGAS-STING pathway is responsible for cytoplasmic double-stranded DNA (dsDNA) -triggered innate immunity and involved in the pathology of various diseases including infection, autoimmune diseases, neurodegeneration and cancer. Understanding the activation and regulatory mechanisms of this pathway is critical to develop therapeutic strategies toward these diseases. Here, we review the signal transduction, cellular functions and regulations of cGAS and STING, particularly highlighting the latest understandings on the activation of cGAS by dsDNA and/or Manganese (Mn2+), STING trafficking, sulfated glycosaminoglycans (sGAGs)-induced STING polymerization and activation, and also regulation of the cGAS-STING pathway by different biocondensates formed via phase separation of proteins from host cells and viruses.
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Affiliation(s)
- Run Fang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Qifei Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Xiaoyu Yu
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Zhen Zhao
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Zhengfan Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China.
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39
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Takizawa Y, Kurumizaka H. Chromatin structure meets cryo-EM: Dynamic building blocks of the functional architecture. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2022; 1865:194851. [PMID: 35952957 DOI: 10.1016/j.bbagrm.2022.194851] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/04/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Chromatin is a dynamic molecular complex composed of DNA and proteins that package the DNA in the nucleus of eukaryotic cells. The basic structural unit of chromatin is the nucleosome core particle, composed of ~150 base pairs of genomic DNA wrapped around a histone octamer containing two copies each of four histones, H2A, H2B, H3, and H4. Individual nucleosome core particles are connected by short linker DNAs, forming a nucleosome array known as a beads-on-a-string fiber. Higher-order structures of chromatin are closely linked to nuclear events such as replication, transcription, recombination, and repair. Recently, a variety of chromatin structures have been determined by single-particle cryo-electron microscopy (cryo-EM) and cryo-electron tomography (cryo-ET), and their structural details have provided clues about the chromatin architecture functions in the cell. In this review, we highlight recent cryo-EM structural studies of a fundamental chromatin unit to clarify the functions of chromatin.
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Affiliation(s)
- Yoshimasa Takizawa
- Laboratory of Chromatin Structure and Function, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
| | - Hitoshi Kurumizaka
- Laboratory of Chromatin Structure and Function, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.
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40
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Guo X, Hintzsche H, Xu W, Ni J, Xue J, Wang X. Interplay of cGAS with micronuclei: Regulation and diseases. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2022; 790:108440. [PMID: 35970331 DOI: 10.1016/j.mrrev.2022.108440] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 08/02/2022] [Accepted: 08/09/2022] [Indexed: 01/01/2023]
Abstract
In higher eukaryotes, sophisticate regulation of genome function requires all chromosomes to be packed into a single nucleus. Micronucleus (MN), the dissociative nucleus-like structure frequently observed in aging and multiple disease settings, has critical, yet under-recognized, pathophysiological functions. Micronuclei (MNi) have recently emerged as major sources of cytosolic DNA that can activate the cGAS-STING axis in a cell-intrinsic manner. However, MNi induced from different genotoxic stressors display great heterogeneity in binding or activating cGAS and the signaling responses downstream of the MN-induced cGAS-STING axis have divergent outcomes including autoimmunity, autoinflammation, metastasis, or cell death. Thus, full characterization of molecular network underpinning the interplay of cGAS and MN is important to elucidate the pathophysiological roles of immunogenic MN and design improved drugs that selectively target cancer via boosting the MN-derived cGAS-STING axis. Here, we summarize our current understanding of the mechanisms for self-DNA discrimination by cGAS. We focus on discussing how MN immunogencity is dictated by multiple mechanisms including integrity of micronuclear envelope, state of nucleosome and DNA, competitive factors, damaged mitochondrial DNA and micronucleophagy. We also describe emerging links between immunogenic MN and human diseases including cancer, neurodegenerative diseases and COVID-19. Particularly, we explore the exciting concept of inducing immunogenic MN as a therapeutic approach in treating cancer. We propose a new theoretical framework to describe immunogenic MN as a biological sensor to modulate cellular processes in response to genotoxic stress and provide perspectives on developing novel experimental approaches to unravel the complexity of MN immunogenicity regulation and immunogenic MN pathophysiology.
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Affiliation(s)
- Xihan Guo
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, Yunnan 650500, China.
| | - Henning Hintzsche
- Department of Food Safety, Institute of Nutrition and Food Sciences, University of Bonn, Germany.
| | - Weijiang Xu
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, Yunnan 650500, China
| | - Juan Ni
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, Yunnan 650500, China
| | - Jinglun Xue
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Xu Wang
- School of Life Sciences, The Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming, Yunnan 650500, China.
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41
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Singh RS, Vidhyasagar V, Yang S, Arna AB, Yadav M, Aggarwal A, Aguilera AN, Shinriki S, Bhanumathy KK, Pandey K, Xu A, Rapin N, Bosch M, DeCoteau J, Xiang J, Vizeacoumar FJ, Zhou Y, Misra V, Matsui H, Ross SR, Wu Y. DDX41 is required for cGAS-STING activation against DNA virus infection. Cell Rep 2022; 39:110856. [PMID: 35613581 PMCID: PMC9205463 DOI: 10.1016/j.celrep.2022.110856] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 04/07/2022] [Accepted: 05/02/2022] [Indexed: 12/27/2022] Open
Abstract
Upon binding double-stranded DNA (dsDNA), cyclic GMP-AMP synthase (cGAS) is activated and initiates the cGAS-stimulator of IFN genes (STING)-type I interferon pathway. DEAD-box helicase 41 (DDX41) is a DEAD-box helicase, and mutations in DDX41 cause myelodysplastic syndromes (MDSs) and acute myeloid leukemia (AML). Here, we show that DDX41-knockout (KO) cells have reduced type I interferon production after DNA virus infection. Unexpectedly, activations of cGAS and STING are affected in DDX41 KO cells, suggesting that DDX41 functions upstream of cGAS. The recombinant DDX41 protein exhibits ATP-dependent DNA-unwinding activity and ATP-independent strand-annealing activity. The MDS/AML-derived mutant R525H has reduced unwinding activity but retains normal strand-annealing activity and stimulates greater cGAS dinucleotide-synthesis activity than wild-type DDX41. Overexpression of R525H in either DDX41-deficient or -proficient cells results in higher type I interferon production. Our results have led to the hypothesis that DDX41 utilizes its unwinding and annealing activities to regulate the homeostasis of dsDNA and single-stranded DNA (ssDNA), which, in turn, regulates cGAS-STING activation. cGAS is activated by dsDNA. Singh et al. find DDX41 regulates cGAS activation through unwinding and annealing activities on dsDNA and ssDNA, respectively, and MDS/AML patient mutant R525H causes overactivation of innate immune response due to its unbalanced activities. This DDX41-cGAS-STING pathway may be related to molecular pathogenesis of MDS/AML.
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Affiliation(s)
- Ravi Shankar Singh
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon SK S7N 5E5, Canada
| | | | - Shizhuo Yang
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon SK S7N 5E5, Canada
| | - Ananna Bhadra Arna
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon SK S7N 5E5, Canada
| | - Manisha Yadav
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon SK S7N 5E5, Canada
| | - Aanchal Aggarwal
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon SK S7N 5E5, Canada
| | - Alexya N Aguilera
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Satoru Shinriki
- Department of Molecular Laboratory Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | | | - Kannupriya Pandey
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Aizhang Xu
- Saskatchewan Cancer Agency, Saskatoon, SK S7N 5E5, Canada
| | - Noreen Rapin
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - Mark Bosch
- Saskatchewan Cancer Agency, Saskatoon, SK S7N 5E5, Canada
| | - John DeCoteau
- Department of Pathology and Laboratory Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Jim Xiang
- Saskatchewan Cancer Agency, Saskatoon, SK S7N 5E5, Canada
| | - Franco J Vizeacoumar
- Saskatchewan Cancer Agency, Saskatoon, SK S7N 5E5, Canada; Department of Pathology and Laboratory Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Yan Zhou
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada; Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - Vikram Misra
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - Hirotaka Matsui
- Department of Molecular Laboratory Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Susan R Ross
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Yuliang Wu
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon SK S7N 5E5, Canada.
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42
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Hong Z, Mei J, Guo H, Zhu J, Wang C. Intervention of cGAS‒STING signaling in sterile inflammatory diseases. J Mol Cell Biol 2022; 14:mjac005. [PMID: 35084490 PMCID: PMC9122663 DOI: 10.1093/jmcb/mjac005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/21/2021] [Accepted: 11/24/2021] [Indexed: 11/12/2022] Open
Abstract
Sterile inflammation characterized by unresolved chronic inflammation is well established to promote the progression of multiple autoimmune diseases, metabolic disorders, neurodegenerative diseases, and cardiovascular diseases, collectively termed 'sterile inflammatory diseases'. By recognizing host-derived DNA, cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS) activates endoplasmic reticulum-associated stimulator of interferon genes (STING), which leads to the induction of type I interferons and inflammatory cytokines or immunogenic cell death that promotes sterile inflammation. Additionally, the DNA/cGAS-independent mode of STING activation has also been characterized in the progression of several sterile inflammatory diseases. This review focuses on the molecular mechanism of cGAS-dependent and cGAS-independent STING signaling under various disease conditions, particularly highlighting the diverse initiators upon this signaling pathway. We also summarize recent advances in the discovery of antagonists targeting cGAS and STING and the evaluation of their efficiencies in preclinical models. Finally, we discuss potential differences in the clinical applications of the specific antagonists, which may shed light on the precision therapeutic interventions.
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Affiliation(s)
- Ze Hong
- State Key Laboratory of Natural Medicines, Department of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Jiahao Mei
- State Key Laboratory of Natural Medicines, Department of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Hanli Guo
- State Key Laboratory of Natural Medicines, Department of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Juanjuan Zhu
- State Key Laboratory of Natural Medicines, Department of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
| | - Chen Wang
- State Key Laboratory of Natural Medicines, Department of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China
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Mitochondrial damage and activation of the cytosolic DNA sensor cGAS-STING pathway lead to cardiac pyroptosis and hypertrophy in diabetic cardiomyopathy mice. Cell Death Dis 2022; 8:258. [PMID: 35538059 PMCID: PMC9091247 DOI: 10.1038/s41420-022-01046-w] [Citation(s) in RCA: 85] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/22/2022] [Accepted: 04/26/2022] [Indexed: 02/07/2023]
Abstract
Diabetic cardiomyopathy (DCM) is a serious cardiac complication of diabetes that currently lacks specific treatment. The cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) signaling pathway has been suggested to contribute to the pathogenesis of cardiovascular diseases. However, whether cGAS-STING is involved in the development of DCM has not been established. Our study aimed to determine the role of cGAS-STING in the initiation of nucleotide-binding oligomerization domain-like receptor pyrin domain containing 3 (NLRP3) inflammasome-induced cardiac pyroptosis and chronic inflammation during the pathogenesis of DCM. C57BL/6J mice were preinjected with adeno-associated virus 9 (AAV9) intravenously via the tail vein to specifically knock down myocardial STING. After four weeks, mice with myocardium-specific knockdown of STING received injections of streptozotocin (STZ; 50 mg/kg) and a high-fat diet to induce diabetes. Measurements included echocardiography, immunohistochemical analyses, wheat germ agglutinin (WGA) staining, and western blotting. Here, we showed that the cGAS-STING signaling pathway was activated in diabetic hearts, which was indicated by the increased phosphorylation of TANK-binding kinase 1 (TBK1) and interferon (IFN) regulatory factor 3 (IRF3), leading to the activation of the NLRP3 inflammasome in the hearts of diabetic mice and proinflammatory cytokine release into serum. Moreover, STING knockdown via adeno-associated virus-9 (AAV9) in diabetic mouse heart alleviated cardiac pyroptosis and the inflammatory response, prevented diabetes-induced hypertrophy, and restored cardiac function. Mechanistically, we showed that palmitic acid (PA)-induced lipotoxicity impairs mitochondrial homeostasis, producing excessive mitochondrial reactive oxygen species (mtROS), which results in oxidative damage to mitochondrial DNA (mtDNA) and its release into the cytoplasm while switching on cGAS-STING-mediated pyroptosis in cardiomyocytes, thereby worsening the progression of diabetic cardiomyopathy. Our study demonstrated that activation of the cGAS-STING pathway caused by mitochondrial oxidative damage and mtDNA escape induced by free fatty acids promoted pyroptosis and proinflammatory responses in cardiomyocytes in a NLRP3 inflammasome-dependent manner, thus promoting myocardial hypertrophy during the progression of DCM.
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Nuclear soluble cGAS senses double-stranded DNA virus infection. Commun Biol 2022; 5:433. [PMID: 35538147 PMCID: PMC9090744 DOI: 10.1038/s42003-022-03400-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 04/22/2022] [Indexed: 11/08/2022] Open
Abstract
The DNA sensor cGAS detects cytosolic DNA and instigates type I interferon (IFN) expression. Recent studies find that cGAS also localizes in the nucleus and binds the chromatin. Despite the mechanism controlling nuclear cGAS activation is well elucidated, whether nuclear cGAS participates in DNA sensing is unclear. Here, we report that herpes simplex virus 1 (HSV-1) infection caused the release of cGAS from the chromatin into the nuclear soluble fraction. Like its cytosolic counterpart, the leaked nuclear soluble cGAS also sensed viral DNA, produced cGAMP, and induced mRNA expression of type I IFN and interferon-stimulated genes. Consistently, the nuclear soluble cGAS limited HSV-1 infection. Furthermore, enzyme-deficient mutation (D307A) or cGAS inhibitor RU.251 abolished nuclear cGAS-mediated innate immune responses, suggesting that enzymatic activity is also required for nuclear soluble cGAS. Taken all together, our study demonstrates that nuclear soluble cGAS acts as a nuclear DNA sensor detecting nuclear-replicating DNA viruses.
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Abstract
Inflammation plays indispensable roles in building the immune responses such as acquired immunity against harmful pathogens. Furthermore, it is essential for maintaining biological homeostasis in ever-changing conditions. Pattern-recognition receptors (PRRs) reside in cell membranes, endosomes or cytoplasm, and function as triggers for inflammatory responses. Binding of pathogen- or self-derived components, such as DNA, to PRRs activates downstream signaling cascades, resulting in the production of a series of pro-inflammatory cytokines and type I interferons (IFNs). While these series of responses are essential for host defense, the unexpected release of DNA from the nucleus or mitochondria of host cells can lead to autoimmune and autoinflammatory diseases. In this review, we focus on DNA-sensing mechanisms via PRRs and the disorders and extraordinary conditions caused by self-derived DNA.
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Affiliation(s)
- Daisuke Ori
- Division of Biological Science, Graduate School of Science and Technology, Laboratory of Molecular Immunobiology, Nara Institute of Science and Technology (NAIST), Ikoma, Japan
| | - Taro Kawai
- Division of Biological Science, Graduate School of Science and Technology, Laboratory of Molecular Immunobiology, Nara Institute of Science and Technology (NAIST), Ikoma, Japan
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Wang F, Zhao M, Chang B, Zhou Y, Wu X, Ma M, Liu S, Cao Y, Zheng M, Dang Y, Xu J, Chen L, Liu T, Tang F, Ren Y, Xu Z, Mao Z, Huang K, Luo M, Li J, Liu H, Ge B. Cytoplasmic PARP1 links the genome instability to the inhibition of antiviral immunity through PARylating cGAS. Mol Cell 2022; 82:2032-2049.e7. [PMID: 35460603 DOI: 10.1016/j.molcel.2022.03.034] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 12/10/2021] [Accepted: 03/25/2022] [Indexed: 12/22/2022]
Abstract
Virus infection modulates both host immunity and host genomic stability. Poly(ADP-ribose) polymerase 1 (PARP1) is a key nuclear sensor of DNA damage, which maintains genomic integrity, and the successful application of PARP1 inhibitors for clinical anti-cancer therapy has lasted for decades. However, precisely how PARP1 gains access to cytoplasm and regulates antiviral immunity remains unknown. Here, we report that DNA virus induces a reactive nitrogen species (RNS)-dependent DNA damage and activates DNA-dependent protein kinase (DNA-PK). Activated DNA-PK phosphorylates PARP1 on Thr594, thus facilitating the cytoplasmic translocation of PARP1 to inhibit the antiviral immunity both in vitro and in vivo. Mechanistically, cytoplasmic PARP1 interacts with and directly PARylates cyclic GMP-AMP synthase (cGAS) on Asp191 to inhibit its DNA-binding ability. Together, our findings uncover an essential role of PARP1 in linking virus-induced genome instability with inhibition of host immunity, which is of relevance to cancer, autoinflammation, and other diseases.
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Affiliation(s)
- Fei Wang
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Mengmeng Zhao
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Boran Chang
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Yilong Zhou
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China
| | - Xiangyang Wu
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Mingtong Ma
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China
| | - Siyu Liu
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China
| | - Yajuan Cao
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Mengge Zheng
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Yifang Dang
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Junfang Xu
- Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Li Chen
- Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University School of Medicine, Shanghai 200433, China
| | - Tianhao Liu
- Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University School of Medicine, Shanghai 200433, China
| | - Fen Tang
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China
| | - Yefei Ren
- Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China
| | - Zhu Xu
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China
| | - Zhiyong Mao
- Clinical and Translational Research Center of Shanghai First Maternity & Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China
| | - Kai Huang
- Department of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Clinical Center for Human Genomic Research, Union Hospital, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Minhua Luo
- State Key Laboratory of Virology, CAS Center for Excellence in Brain Science and Intelligence Technology, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Jinsong Li
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China.
| | - Haipeng Liu
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Central Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University School of Medicine, Shanghai 200433, China.
| | - Baoxue Ge
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China; Department of Microbiology and Immunology, Tongji University School of Medicine, Shanghai 200072, China; Clinical Translation Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China.
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Zhou K, Gebala M, Woods D, Sundararajan K, Edwards G, Krzizike D, Wereszczynski J, Straight AF, Luger K. CENP-N promotes the compaction of centromeric chromatin. Nat Struct Mol Biol 2022; 29:403-413. [PMID: 35422519 PMCID: PMC9010303 DOI: 10.1038/s41594-022-00758-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/08/2022] [Indexed: 12/14/2022]
Abstract
The histone variant CENP-A is the epigenetic determinant for the centromere, where it is interspersed with canonical H3 to form a specialized chromatin structure that nucleates the kinetochore. How nucleosomes at the centromere arrange into higher order structures is unknown. Here we demonstrate that the human CENP-A-interacting protein CENP-N promotes the stacking of CENP-A-containing mononucleosomes and nucleosomal arrays through a previously undefined interaction between the α6 helix of CENP-N with the DNA of a neighboring nucleosome. We describe the cryo-EM structures and biophysical characterization of such CENP-N-mediated nucleosome stacks and nucleosomal arrays and demonstrate that this interaction is responsible for the formation of densely packed chromatin at the centromere in the cell. Our results provide first evidence that CENP-A, together with CENP-N, promotes specific chromatin higher order structure at the centromere.
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Affiliation(s)
- Keda Zhou
- Department of Biochemistry, University of Colorado at Boulder, Boulder, CO, USA
| | - Magdalena Gebala
- Department of Biochemistry, Stanford University, Stanford, CA, USA
| | - Dustin Woods
- Department of Chemistry and the Center for Molecular Study of Condensed Soft Matter, Illinois Institute of Technology, Chicago, IL, USA
| | | | - Garrett Edwards
- Department of Biochemistry, University of Colorado at Boulder, Boulder, CO, USA
| | - Dan Krzizike
- Department of Biochemistry, University of Colorado at Boulder, Boulder, CO, USA
| | - Jeff Wereszczynski
- Department of Physics and the Center for Molecular Study of Condensed Soft Matter, Illinois Institute of Technology, Chicago, IL, USA
| | - Aaron F Straight
- Department of Biochemistry, Stanford University, Stanford, CA, USA.
| | - Karolin Luger
- Department of Biochemistry, University of Colorado at Boulder, Boulder, CO, USA.
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, CO, USA.
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Structural Mechanics of the Alpha-2-Macroglobulin Transformation. J Mol Biol 2022; 434:167413. [PMID: 34942166 PMCID: PMC8897276 DOI: 10.1016/j.jmb.2021.167413] [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: 10/22/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/21/2022]
Abstract
Alpha-2-Macroglobulin (A2M) is the critical pan-protease inhibitor of the innate immune system. When proteases cleave the A2M bait region, global structural transformation of the A2M tetramer is triggered to entrap the protease. The structural basis behind the cleavage-induced transformation and the protease entrapment remains unclear. Here, we report cryo-EM structures of native- and intermediate-forms of the Xenopus laevis egg A2M homolog (A2Moo or ovomacroglobulin) tetramer at 3.7-4.1 Å and 6.4 Å resolution, respectively. In the native A2Moo tetramer, two pairs of dimers arrange into a cross-like configuration with four 60 Å-wide bait-exposing grooves. Each bait in the native form threads into an aperture formed by three macroglobulin domains (MG2, MG3, MG6). The bait is released from the narrowed aperture in the induced protomer of the intermediate form. We propose that the intact bait region works as a "latch-lock" to block futile A2M transformation until its protease-mediated cleavage.
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Guey B, Ablasser A. Emerging dimensions of cellular cGAS-STING signaling. Curr Opin Immunol 2022; 74:164-171. [DOI: 10.1016/j.coi.2022.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 01/11/2022] [Accepted: 01/15/2022] [Indexed: 12/14/2022]
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50
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Zhang ZD, Zhong B. Regulation and function of the cGAS-MITA/STING axis in health and disease. CELL INSIGHT 2022; 1:100001. [PMID: 37192983 PMCID: PMC10120319 DOI: 10.1016/j.cellin.2021.100001] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/18/2021] [Accepted: 12/06/2021] [Indexed: 05/18/2023]
Abstract
The innate immune systems detect pathogens via pattern-recognition receptors including nucleic acid sensors and non-nucleic acid sensors. Cyclic guanosine monophosphate-adenosine monophosphate (cGAMP) synthase (cGAS, also known as MB21D1) is a cytosolic DNA sensor that recognizes double-stranded DNA (dsDNA) and catalyzes the synthesis of 2',3'-cGAMP. Subsequently, 2',3'-cGAMP binds to the adaptor protein mediator of IRF3 activation (MITA, also known as STING, MPYS, ERIS, and TMEM173) to activate downstream signaling cascades. The cGAS-MITA/STING signaling critically mediates immune responses against DNA viruses, retroviruses, bacteria, and protozoan parasites. In addition, recent discoveries have extended our understanding of the roles of the cGAS-MITA/STING pathway in autoimmune diseases and cancers. Here, we summarize the identification and activation of cGAS and MITA/STING, present the updated functions and regulatory mechanisms of cGAS-MITA/STING signaling and provide a comprehensive understanding of the cGAS-MITA/STING axis in autoimmune diseases and cancers.
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Affiliation(s)
- Zhi-Dong Zhang
- Department of Gastrointestinal Surgery, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
- Department of Pulmonary and Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
- Frontier Science Center for Immunology and Metabolism, Wuhan University, Wuhan, 430071, China
- Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, 430071, China
| | - Bo Zhong
- Department of Gastrointestinal Surgery, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
- Department of Pulmonary and Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
- Frontier Science Center for Immunology and Metabolism, Wuhan University, Wuhan, 430071, China
- Department of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
- Wuhan Research Center for Infectious Diseases and Cancer, Chinese Academy of Medical Sciences, Wuhan, 430071, China
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