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Paulis A, Onali A, Vidalain PO, Lotteau V, Jaquemin C, Corona A, Distinto S, Delogu GL, Tramontano E. Identification of new benzofuran derivatives as STING agonists with broad-spectrum antiviral activity. Virus Res 2024; 347:199432. [PMID: 38969014 PMCID: PMC11294726 DOI: 10.1016/j.virusres.2024.199432] [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: 04/06/2024] [Revised: 06/22/2024] [Accepted: 07/02/2024] [Indexed: 07/07/2024]
Abstract
The Stimulator of Interferon Genes (STING) is involved in cytosolic DNA sensing and type I Interferons (IFN-I) induction. Aiming to identify new STING agonists with antiviral activity and given the known biological activity of benzothiazole and benzimidazole derivatives, a series of benzofuran derivatives were tested for their ability to act as STING agonists, induce IFN-I and inhibit viral replication. Compounds were firstly evaluated in a gene reporter assay measuring luciferase activity driven by the human IFN-β promoter in cells expressing exogenous STING (HEK293T). Seven of them were able to induce IFN-β transcription while no induction of the IFN promoter was observed in the presence of a mutated and inactive STING, showing specific protein-ligand interaction. Docking studies were performed to predict their putative binding mode. The best hit compounds were then tested on human coronavirus 229E replication in BEAS-2B and MRC-5 cells and three derivatives showed EC50 values in the μM range. Such compounds were also tested on SARS-CoV-2 replication in BEAS-2B cells and in Calu-3 showing they can inhibit SARS-CoV-2 replication at nanomolar concentrations. To further confirm their IFN-dependent antiviral activity, compounds were tested to verify their effect on phospho-IRF3 nuclear localization, that was found to be induced by benzofuran derivatives, and SARS-CoV-2 replication in Vero E6 cells, lacking IFN production, founding them to be inactive. In conclusion, we identified benzofurans as STING-dependent immunostimulatory compounds and host-targeting inhibitors of coronaviruses representing a novel chemical scaffold for the development of broad-spectrum antivirals.
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Affiliation(s)
- A Paulis
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato 09042, Italy
| | - A Onali
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato 09042, Italy
| | - P O Vidalain
- CIRI, Centre International de Recherche en Infectiologie, University Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon F-69007, France
| | - V Lotteau
- CIRI, Centre International de Recherche en Infectiologie, University Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon F-69007, France
| | - C Jaquemin
- CIRI, Centre International de Recherche en Infectiologie, University Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon F-69007, France
| | - A Corona
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato 09042, Italy
| | - S Distinto
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato 09042, Italy.
| | - G L Delogu
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato 09042, Italy
| | - E Tramontano
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato 09042, Italy.
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2
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Chudy P, Kochan J, Wawro M, Nguyen P, Gorczyca M, Varanko A, Retka A, Ghadei SS, Napieralska E, Grochot-Przęczek A, Szade K, Berendes LS, Park J, Sokołowski G, Yu Q, Józkowicz A, Nowak WN, Krzeptowski W. Heme oxygenase-1 protects cells from replication stress. Redox Biol 2024; 75:103247. [PMID: 39047636 PMCID: PMC11321372 DOI: 10.1016/j.redox.2024.103247] [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: 05/17/2024] [Accepted: 06/18/2024] [Indexed: 07/27/2024] Open
Abstract
Heme oxygenase-1 (HO-1, HMOX1) degrades heme protecting cells from heme-induced oxidative damage. Beyond its well-established cellular functions, heme has emerged as a stabilizer of G-quadruplexes. These secondary DNA structures interfere with DNA replication. We recently revealed that nuclear HO-1 colocalizes with DNA G-quadruplexes and promotes their removal. Here, we investigate whether HO-1 safeguards cells against replication stress. Experiments were conducted in control and HMOX1-deficient HEK293T cell lines. Immunostaining unveiled that DNA G-quadruplexes accumulated in the absence of HO-1, the effect that was further enhanced in response to δ-aminolevulinic acid (ALA), a substrate in heme synthesis. This was associated with replication stress, as evidenced by an elevated proportion of stalled forks analyzed by fiber assay. We observed the same effects in hematopoietic stem cells isolated from Hmox1 knockout mice and in a lymphoblastoid cell line from an HMOX1-deficient patient. Interestingly, in the absence of HO-1, the speed of fork progression was higher, and the response to DNA conformational hindrance less stringent, indicating dysfunction of the PARP1-p53-p21 axis. PARP1 activity was not decreased in the absence of HO-1. Instead, we observed that HO-1 deficiency impairs the nuclear import and accumulation of p53, an effect dependent on the removal of excess heme. We also demonstrated that administering ALA is a more specific method for increasing intracellular free heme compared to treatment with hemin, which in turn induces strong lipid peroxidation. Our results indicate that protection against replication stress is a universal feature of HO-1, presumably contributing to its widely recognized cytoprotective activity.
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Affiliation(s)
- Patryk Chudy
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland; Doctoral School of Exact and Natural Sciences, Jagiellonian University, Krakow, Poland
| | - Jakub Kochan
- Department of Cell Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Mateusz Wawro
- Department of Cell Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Phu Nguyen
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Monika Gorczyca
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Aliaksandra Varanko
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Aleksandra Retka
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Swati Sweta Ghadei
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Emilija Napieralska
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Anna Grochot-Przęczek
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Krzysztof Szade
- Laboratory of Stem Cell Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Lea-Sophie Berendes
- Department of General Pediatrics, University Hospital Münster, Münster, Germany
| | - Julien Park
- Department of General Pediatrics, University Hospital Münster, Münster, Germany
| | - Grzegorz Sokołowski
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Qiuliyang Yu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, China
| | - Alicja Józkowicz
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Witold N Nowak
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland; August Chełkowski Institute of Physics, Faculty of Science and Technology, University of Silesia, Chorzów, Poland.
| | - Wojciech Krzeptowski
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.
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3
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Li X, Cheng K, Shang MD, Yang Y, Hu B, Wang X, Wei XD, Han YC, Zhang XG, Dong MH, Yang ZL, Wang JQ. MARCH1 negatively regulates TBK1-mTOR signaling pathway by ubiquitinating TBK1. BMC Cancer 2024; 24:902. [PMID: 39061024 PMCID: PMC11282859 DOI: 10.1186/s12885-024-12667-y] [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: 11/16/2023] [Accepted: 07/22/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND TBK1 positively regulates the growth factor-mediated mTOR signaling pathway by phosphorylating mTOR. However, it remains unclear how the TBK1-mTOR signaling pathway is regulated. Considering that STING not only interacts with TBK1 but also with MARCH1, we speculated that MARCH1 might regulate the mTOR signaling pathway by targeting TBK1. The aim of this study was to determine whether MARCH1 regulates the mTOR signaling pathway by targeting TBK1. METHODS The co-immunoprecipitation (Co-IP) assay was used to verify the interaction between MARCH1 with STING or TBK1. The ubiquitination of STING or TBK1 was analyzed using denatured co-immunoprecipitation. The level of proteins detected in the co-immunoprecipitation or denatured co-immunoprecipitation samples were determined by Western blotting. Stable knocked-down cells were constructed by infecting lentivirus bearing the related shRNA sequences. Scratch wound healing and clonogenic cell survival assays were used to detect the migration and proliferation of breast cancer cells. RESULTS We showed that MARCH1 played an important role in growth factor-induced the TBK1- mTOR signaling pathway. MARCH1 overexpression attenuated the growth factor-induced activation of mTOR signaling pathway, whereas its deficiency resulted in the opposite effect. Mechanistically, MARCH1 interacted with and promoted the K63-linked ubiquitination of TBK1. This ubiquitination of TBK1 then attenuated its interaction with mTOR, thereby inhibiting the growth factor-induced mTOR signaling pathway. Importantly, faster proliferation induced by MARCH1 deficiency was weakened by mTOR, STING, or TBK1 inhibition. CONCLUSION MARCH1 suppressed growth factors mediated the mTOR signaling pathway by targeting the STING-TBK1-mTOR axis.
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Affiliation(s)
- Xiao Li
- The Second Clinical Medical College , Binzhou Medical University, Yantai, Shandong, 264003, P.R. China
| | - Kai Cheng
- The Second Clinical Medical College , Binzhou Medical University, Yantai, Shandong, 264003, P.R. China
| | - Meng-Di Shang
- Peninsular Cancer Research Center, Binzhou Medical University, Yantai, Shandong, 264003, P.R. China
| | - Yong Yang
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong, 256603, P.R. China
| | - Bin Hu
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong, 256603, P.R. China
| | - Xi Wang
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong, 264003, P.R. China
| | - Xiao-Dan Wei
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong, 264003, P.R. China
| | - Yan-Chun Han
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong, 264003, P.R. China
| | - Xiao-Gang Zhang
- School of Rehabilitation Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Meng-Hua Dong
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong, 264003, P.R. China.
| | - Zhen-Lin Yang
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong, 256603, P.R. China.
| | - Jiu-Qiang Wang
- Peninsular Cancer Research Center, Binzhou Medical University, Yantai, Shandong, 264003, P.R. China.
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Hohmann T, Hohmann U, Dehghani F, Grisk O, Jasinski-Bergner S. Analyzing the Impact of the Highest Expressed Epstein-Barr Virus-Encoded microRNAs on the Host Cell Transcriptome. Int J Mol Sci 2024; 25:7838. [PMID: 39063079 PMCID: PMC11276978 DOI: 10.3390/ijms25147838] [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: 06/12/2024] [Revised: 07/10/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
The Epstein-Barr virus (EBV) has a very high prevalence (>90% in adults), establishes a lifelong latency after primary infection, and exerts an oncogenic potential. This dsDNA virus encodes for various molecules, including microRNAs (miRs), which can be detected in the latent and lytic phases with different expression levels and affect, among others, immune evasion and malignant transformation. In this study, the different EBV miRs are quantified in EBV-positive lymphomas, and the impact on the host cell transcriptome of the most abundant EBV miRs will be analyzed using comparative RNA sequencing analyses. The EBV miRs ebv-miR-BART1, -BART4, -BART17, and -BHRF1-1 were most highly expressed, and their selective overexpression in EBV-negative human cells resulted in a large number of statistically significantly down- and up-regulated host cell genes. Functional analyses showed that these dysregulated target genes are involved in important cellular processes, including growth factor pathways such as WNT, EGF, FGF, and PDGF, as well as cellular processes such as apoptosis regulation and inflammation. Individual differences were observed between these four analyzed EBV miRs. In particular, ebv-miR-BHRF1-1 appears to be more important for malignant transformation and immune evasion than the other EBV miRs.
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Affiliation(s)
- Tim Hohmann
- Department of Anatomy and Cell Biology, Medical Faculty, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany; (T.H.); (U.H.); (F.D.)
| | - Urszula Hohmann
- Department of Anatomy and Cell Biology, Medical Faculty, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany; (T.H.); (U.H.); (F.D.)
| | - Faramarz Dehghani
- Department of Anatomy and Cell Biology, Medical Faculty, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany; (T.H.); (U.H.); (F.D.)
| | - Olaf Grisk
- Institute of Physiology, Brandenburg Medical School (MHB), Theodor Fontane, Hochstraße 29, Haus 11, 2.OG, 14770 Brandenburg an der Havel, Germany;
| | - Simon Jasinski-Bergner
- Institute of Physiology, Brandenburg Medical School (MHB), Theodor Fontane, Hochstraße 29, Haus 11, 2.OG, 14770 Brandenburg an der Havel, Germany;
- Institute for Translational Immunology, Brandenburg Medical School (MHB), Theodor Fontane, 14770 Brandenburg an der Havel, Germany
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5
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Ranathunga L, Dodantenna N, Cha JW, Chathuranga K, Chathuranga WAG, Weerawardhana A, Subasinghe A, Haluwana DK, Gamage N, Lee JS. African swine fever virus B175L inhibits the type I interferon pathway by targeting STING and 2'3'-cGAMP. J Virol 2023; 97:e0079523. [PMID: 37902401 PMCID: PMC10688321 DOI: 10.1128/jvi.00795-23] [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: 05/26/2023] [Accepted: 10/11/2023] [Indexed: 10/31/2023] Open
Abstract
IMPORTANCE African swine fever virus (ASFV), the only known DNA arbovirus, is the causative agent of African swine fever (ASF), an acutely contagious disease in pigs. ASF has recently become a crisis in the pig industry in recent years, but there are no commercially available vaccines. Studying the immune evasion mechanisms of ASFV proteins is important for the understanding the pathogenesis of ASFV and essential information for the development of an effective live-attenuated ASFV vaccines. Here, we identified ASFV B175L, previously uncharacterized proteins that inhibit type I interferon signaling by targeting STING and 2'3'-cGAMP. The conserved B175L-zf-FCS motif specifically interacted with both cGAMP and the R238 and Y240 amino acids of STING. Consequently, this interaction interferes with the interaction of cGAMP and STING, thereby inhibiting downstream signaling of IFN-mediated antiviral responses. This novel mechanism of B175L opens a new avenue as one of the ASFV virulent genes that can contribute to the advancement of ASFV live-attenuated vaccines.
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Affiliation(s)
- Lakmal Ranathunga
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - Niranjan Dodantenna
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - Ji-Won Cha
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - Kiramage Chathuranga
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | | | - Asela Weerawardhana
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - Ashan Subasinghe
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - D. K. Haluwana
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - Nuwan Gamage
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
| | - Jong-Soo Lee
- College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
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6
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Barghouth PG, Melemenidis S, Montay-Gruel P, Ollivier J, Viswanathan V, Jorge PG, Soto LA, Lau BC, Sadeghi C, Edlabadkar A, Zhang R, Ru N, Baulch JE, Manjappa R, Wang J, Le Bouteiller M, Surucu M, Yu A, Bush K, Skinner L, Maxim PG, Loo BW, Limoli CL, Vozenin MC, Frock RL. FLASH-RT does not affect chromosome translocations and junction structures beyond that of CONV-RT dose-rates. Radiother Oncol 2023; 188:109906. [PMID: 37690668 PMCID: PMC10591966 DOI: 10.1016/j.radonc.2023.109906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
BACKGROUND AND PURPOSE The impact of radiotherapy (RT) at ultra high vs conventional dose rate (FLASH vs CONV) on the generation and repair of DNA double strand breaks (DSBs) is an important question that remains to be investigated. Here, we tested the hypothesis as to whether FLASH-RT generates decreased chromosomal translocations compared to CONV-RT. MATERIALS AND METHODS We used two FLASH validated electron beams and high-throughput rejoin and genome-wide translocation sequencing (HTGTS-JoinT-seq), employing S. aureus and S. pyogenes Cas9 "bait" DNA double strand breaks (DSBs) in HEK239T cells, to measure differences in bait-proximal repair and their genome-wide translocations to "prey" DSBs generated after various irradiation doses, dose rates and oxygen tensions (normoxic, 21% O2; physiological, 4% O2; hypoxic, 2% and 0.5% O2). Electron irradiation was delivered using a FLASH capable Varian Trilogy and the eRT6/Oriatron at CONV (0.08-0.13 Gy/s) and FLASH (1x102-5x106 Gy/s) dose rates. Related experiments using clonogenic survival and γH2AX foci in the 293T and the U87 glioblastoma lines were also performed to discern FLASH-RT vs CONV-RT DSB effects. RESULTS Normoxic and physioxic irradiation of HEK293T cells increased translocations at the cost of decreasing bait-proximal repair but were indistinguishable between CONV-RT and FLASH-RT. Although no apparent increase in chromosome translocations was observed with hypoxia-induced apoptosis, the combined decrease in oxygen tension with IR dose-rate modulation did not reveal significant differences in the level of translocations nor in their junction structures. Furthermore, RT dose rate modality on U87 cells did not change γH2AX foci numbers at 1- and 24-hours post-irradiation nor did this affect 293T clonogenic survival. CONCLUSION Irrespective of oxygen tension, FLASH-RT produces translocations and junction structures at levels and proportions that are indistinguishable from CONV-RT.
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Affiliation(s)
- Paul G Barghouth
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Stavros Melemenidis
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Pierre Montay-Gruel
- Laboratory of Radiation Oncology, Department of Radiation Oncology, Lausanne University Hospital and University of Lausanne, Switzerland; Department of Radiation Oncology, University of California, Irvine, CA 92697-2695, USA
| | - Jonathan Ollivier
- Laboratory of Radiation Oncology, Department of Radiation Oncology, Lausanne University Hospital and University of Lausanne, Switzerland
| | - Vignesh Viswanathan
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Patrik G Jorge
- Institute of Radiation Physics/CHUV, Lausanne University Hospital, Switzerland
| | - Luis A Soto
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Brianna C Lau
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Cheyenne Sadeghi
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Anushka Edlabadkar
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Richard Zhang
- Department of Radiation Oncology, University of California, Irvine, CA 92697-2695, USA
| | - Ning Ru
- Department of Radiation Oncology, University of California, Irvine, CA 92697-2695, USA
| | - Janet E Baulch
- Department of Radiation Oncology, University of California, Irvine, CA 92697-2695, USA
| | - Rakesh Manjappa
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jinghui Wang
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Marie Le Bouteiller
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Murat Surucu
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Amy Yu
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Karl Bush
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Lawrie Skinner
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Peter G Maxim
- Department of Radiation Oncology, University of California, Irvine, CA 92697-2695, USA
| | - Billy W Loo
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Charles L Limoli
- Department of Radiation Oncology, University of California, Irvine, CA 92697-2695, USA
| | - Marie-Catherine Vozenin
- Laboratory of Radiation Oncology, Department of Radiation Oncology, Lausanne University Hospital and University of Lausanne, Switzerland
| | - Richard L Frock
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA.
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7
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Tian X, Zhang Z, Ding M. TXLNA enhances TBK1 phosphorylation by suppressing PPM1B recruitment. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119550. [PMID: 37506885 DOI: 10.1016/j.bbamcr.2023.119550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
In recent years, there has been a notable increase in cancer incidence and mortality, and immune abnormalities have been closely linked to malignancy development. TANK-binding kinase 1 (TBK1) is a non-classical IκB kinase that regulates interferon and NF-κB signaling pathways and plays a crucial role in innate immunity. Recent studies have shown high expression levels of TBK1 and increased activity in various tumor cells, suggesting its involvement in the development and progression of multiple cancers. Targeting TBK1 for tumor therapy may be a possibility. However, little is known about the abnormal activation and dynamic regulation of TBK1 in cancer. First, we utilized the BioID biotinylation technique combined with TMT-based quantitative proteomics to analyze the TBK1 interacting proteins. Our results revealed that TXLNA interacts with TBK1 and binds to the α-helical scaffold of TBK1. The expression of TXLNA could affect the S172 phosphorylation of TBK1. PPM1B is a phosphatase that can dephosphorylate TBK1 S172, so we used the APEX2 proximity labeling technique combined with TMT-based quantitative proteomics to explore the interacting proteins of PPM1B and search for the regulatory pathway of TXLNA on TBK1 phosphorylation. We found that PPM1B interacts with TXLNA. Based on these results, we further found that TXLNA impairs the binding of PPM1B to TBK1, inhibiting the dephosphorylation of TBK1 and contributing to the abnormal enhancement of TBK1 activity in cancer cells. This study sheds light on the potential mechanism of aberrant activation and dynamic regulation of TBK1 in tumors and provides a potential target for tumor therapy.
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Affiliation(s)
- Xiao Tian
- School of Life Science and Technology, China Pharmaceutical University, Nanjing 211199, China
| | - Zhiyuan Zhang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing 211199, China
| | - Ming Ding
- School of Life Science and Technology, China Pharmaceutical University, Nanjing 211199, China.
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8
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Xue Q, Zhu Z, Xue Z, Yang F, Cao W, Liu X, Liu H, Zheng H. NOG1 downregulates type I interferon production by targeting phosphorylated interferon regulatory factor 3. PLoS Pathog 2023; 19:e1011511. [PMID: 37410776 DOI: 10.1371/journal.ppat.1011511] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 06/26/2023] [Indexed: 07/08/2023] Open
Abstract
The innate immune system is the first line of the host's defense, and studying the mechanisms of the negative regulation of interferon (IFN) signaling is important for maintaining the balance of innate immune responses. Here, we found that the host GTP-binding protein 4 (NOG1) is a negative regulator of innate immune responses. Overexpression of NOG1 inhibited viral RNA- and DNA-mediated signaling pathways, and NOG1 deficiency promoted the antiviral innate immune response, resulting in the ability of NOG1 to promote viral replication. Vesicular stomatitis virus (VSV) and herpes simplex virus type 1 (HSV-1) infection induced a higher level of IFN-β protein in NOG1 deficient mice. Meanwhile, NOG1-deficient mice were more resistant to VSV and HSV-1 infection. NOG1 inhibited type I IFN production by targeting IRF3. NOG1 was also found to interact with phosphorylated IFN regulatory factor 3 (IRF3) to impair its DNA binding activity, thereby downregulating the transcription of IFN-β and downstream IFN-stimulated genes (ISGs). The GTP binding domain of NOG1 is responsible for this process. In conclusion, our study reveals an underlying mechanism of how NOG1 negatively regulates IFN-β by targeting IRF3, which uncovers a novel role of NOG1 in host innate immunity.
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Affiliation(s)
- Qiao Xue
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Zixiang Zhu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Zhaoning Xue
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Fan Yang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Weijun Cao
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Xiangtao Liu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Huisheng Liu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Haixue Zheng
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
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9
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Dai H, Wang Y, Fan Z, Guo Y, Chen J, Meng Y, Tong X, Gao M, Wang J. Bovine cyclic GMP-AMP synthase recognizes exogenous double-stranded DNA and activates the STING-depended interferon β production pathway. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 139:104567. [PMID: 36228808 DOI: 10.1016/j.dci.2022.104567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 10/04/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
The cytosolic DNA sensor cyclic GMP-AMP synthase (cGAS) recognizes exogenous double-stranded DNA and produces 2'3'-cyclic GMP-AMP (2'3'-cGAMP), activating the stimulator of interferon genes (STING) and innate immunity. Bovine cGAS functions remain poorly understood. Herein, the coding sequence of the bo-cGAS gene was obtained and its recognition function was investigated. Bo-cGAS consists of 1542 nucleotides and the encoding acid sequence contained high sequence homology to that of other livestock. Bo-cGAS was localized in the endoplasmic reticulum and was abundant in the lung. Bo-cGAS and bo-STING coexistence significantly activated the IFN-β promotor. Synthesized 2'3'-cGAMP activated the STING-dependent pathway. Upon bo-cGAS recognition of poly(dA:dT) and bovine herpesvirus type 1 (BHV-1), Viperin transcription displayed the opposite time-dependent trend. Significant restriction of IFN-β transcription but augmentation of myxovirus resistance protein 1 (Mx1) and Viperin occurred during BHV-1 infection. Thus, bo-cGAS recognized exogenous double-stranded DNA and triggered the STING-dependent IFN-β production pathway.
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Affiliation(s)
- Haiyue Dai
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Animal Epidemiology and Zoonosis, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | - Yixiao Wang
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Zhenying Fan
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Yongli Guo
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Jiaqi Chen
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Ye Meng
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Xin Tong
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Mingchun Gao
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
| | - Junwei Wang
- Heilongjiang Provincial Key Laboratory of Zoonosis, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
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10
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Transcriptomic analysis of the innate immune response to in vitro transfection of plasmid DNA. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 31:43-56. [PMID: 36618265 PMCID: PMC9800263 DOI: 10.1016/j.omtn.2022.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 11/28/2022] [Indexed: 12/12/2022]
Abstract
The innate immune response to cytosolic DNA is intended to protect the host from viral infections, but it can also inhibit the delivery and expression of therapeutic transgenes in gene and cell therapies. The goal of this work was to use mRNA sequencing to identify genes that may influence transfection efficiency in four different cell types (PC-3, Jurkat, HEK-293T, and primary T cells). The highest transfection efficiency was observed in HEK-293T cells, which upregulated only 142 genes with no known antiviral functions after transfection with lipofectamine. Lipofection upregulated 1,057 cytokine-stimulated genes (CSGs) in PC-3 cells, which exhibited a significantly lower transfection efficiency. However, when PC-3 cells were transfected in serum-containing media or electroporated, the observed transfection efficiencies were significantly higher while the expression levels of cytokines and CSGs decreased. In contrast, lipofection of Jurkat and primary T cells only upregulated a few genes, but several of the antiviral CSGs that were absent in HEK-293T cells and upregulated in PC-3 cells were observed to be constitutively expressed in T cells, which may explain the relatively low Lipofection efficiencies observed with T cells (8%-21% GFP+). Indeed, overexpression of one CSG (IFI16) significantly decreased transfection efficiency in HEK-293T cells.
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11
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Cui S, Wang Y, Gao X, Xin T, Wang X, Yu H, Chen S, Jiang Y, Chen Q, Jiang F, Wang D, Guo X, Jia H, Zhu H. African swine fever virus M1249L protein antagonizes type I interferon production via suppressing phosphorylation of TBK1 and degrading IRF3. Virus Res 2022; 319:198872. [PMID: 35853521 DOI: 10.1016/j.virusres.2022.198872] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 12/26/2022]
Abstract
Cyclic GMP-AMP synthase (cGAS) is a major DNA sensor. The recognition of cytosolic DNA by cGAS triggers a robust innate immune response that restricts the replication of diverse viral pathogens through the type I interferon (IFN) and nuclear factor-κB (NF-κB) pathways. African swine fever virus (ASFV) is a large and complex DNA virus reported to strongly inhibit the cGAS-STING signaling pathway. Herein, 12 ASFV structural proteins were screened to determine their effects on the cGAS-STING pathway. Ectopic expression of the ASFV caspid protein M1249L significantly inhibited the IFN-β promoter activity induced by the cGAS-STING pathway in a dose-dependent manner. And it could also downregulate the levels of IFN-β and several interferon-stimulating genes (ISGs) induced by cGAS-STING and 2'3'-cGAMP. Moreover, ASFV M1249L also suppressed phosphorylation of TBK1 by cGAS and STING overexpression. Further study showed that M1249L co-localized and interacted with interferon regulatory factor 3 (IRF3), which led to induce IRF3 degradation by lysosomal pathway. Taken together, our study revealed a novel strategy utilized by ASFV for cGAS-STING-related immune evasion.
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Affiliation(s)
- Shuai Cui
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yang Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xintao Gao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ting Xin
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xixi Wang
- Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Hainan Yu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shiyu Chen
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yajun Jiang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qing Chen
- Beijing University of Agriculture, Beijing, China
| | - Fei Jiang
- China Animal Disease Control Center, Beijing, China
| | - Dongyue Wang
- China Animal Disease Control Center, Beijing, China
| | - Xiaoyu Guo
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
| | - Hong Jia
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
| | - Hongfei Zhu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
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12
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Steiner A, Hrovat-Schaale K, Prigione I, Yu CH, Laohamonthonkul P, Harapas CR, Low RRJ, De Nardo D, Dagley LF, Mlodzianoski MJ, Rogers KL, Zillinger T, Hartmann G, Gantier MP, Gattorno M, Geyer M, Volpi S, Davidson S, Masters SL. Deficiency in coatomer complex I causes aberrant activation of STING signalling. Nat Commun 2022; 13:2321. [PMID: 35484149 PMCID: PMC9051092 DOI: 10.1038/s41467-022-29946-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 04/05/2022] [Indexed: 12/15/2022] Open
Abstract
Coatomer complex I (COPI) mediates retrograde vesicular trafficking from Golgi to the endoplasmic reticulum (ER) and within Golgi compartments. Deficiency in subunit alpha causes COPA syndrome and is associated with type I IFN signalling, although the upstream innate immune sensor involved was unknown. Using in vitro models we find aberrant activation of the STING pathway due to deficient retrograde but probably not intra-Golgi transport. Further we find the upstream cytosolic DNA sensor cGAS as essentially required to drive type I IFN signalling. Genetic deletion of COPI subunits COPG1 or COPD similarly induces type I IFN activation in vitro, which suggests that inflammatory diseases associated with mutations in other COPI subunit genes may exist. Finally, we demonstrate that inflammation in COPA syndrome patient peripheral blood mononuclear cells and COPI-deficient cell lines is ameliorated by treatment with the small molecule STING inhibitor H-151, suggesting targeted inhibition of the cGAS/STING pathway as a promising therapeutic approach.
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Affiliation(s)
- Annemarie Steiner
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
- Institute of Structural Biology, University Hospital Bonn, 53127, Bonn, Germany
| | - Katja Hrovat-Schaale
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Ignazia Prigione
- Centre for Autoinflammatory Diseases and Primary Immunodeficiencies, IRCCS Istituto Giannina Gaslini, 16147, Genoa, Italy
| | - Chien-Hsiung Yu
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Pawat Laohamonthonkul
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Cassandra R Harapas
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Ronnie Ren Jie Low
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
- Personalised Oncology Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Dominic De Nardo
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3168, Australia
| | - Laura F Dagley
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
- Advanced Technology and Biology, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Michael J Mlodzianoski
- Center for Dynamic Imaging, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Kelly L Rogers
- Center for Dynamic Imaging, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Thomas Zillinger
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, 53127, Bonn, Germany
- Institute of Immunology, Philipps-University Marburg, BMFZ, 35043, Marburg, Germany
| | - Gunther Hartmann
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, 53127, Bonn, Germany
- German Centre for Infection Research (DZIF), partner site Bonn-Cologne, 53127, Bonn, Germany
| | - Michael P Gantier
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, 3168, Australia
- Department of Molecular and Translational Science, Monash University, Clayton, VIC, 3168, Australia
| | - Marco Gattorno
- Centre for Autoinflammatory Diseases and Primary Immunodeficiencies, IRCCS Istituto Giannina Gaslini, 16147, Genoa, Italy
| | - Matthias Geyer
- Institute of Structural Biology, University Hospital Bonn, 53127, Bonn, Germany
| | - Stefano Volpi
- Centre for Autoinflammatory Diseases and Primary Immunodeficiencies, IRCCS Istituto Giannina Gaslini, 16147, Genoa, Italy
- University of Genoa, 16126, Genoa, Italy
| | - Sophia Davidson
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Seth L Masters
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia.
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia.
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13
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Hinuma S, Kuroda S. Binding of Hepatitis B Virus Pre-S1 Domain-Derived Synthetic Myristoylated Peptide to Scavenger Receptor Class B Type 1 with Differential Properties from Sodium Taurocholate Cotransporting Polypeptide. Viruses 2022; 14:v14010105. [PMID: 35062309 PMCID: PMC8780415 DOI: 10.3390/v14010105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/05/2022] [Accepted: 01/05/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Background: The myristoylated pre-S1 peptide (Myr47) synthesized to mimic pre-S1 domain (2-48) in large (L) surface protein of hepatitis B virus (HBV) prevents HBV infection to hepatocytes by binding to sodium taurocholate cotransporting polypeptide (NTCP). We previously demonstrated that yeast-derived nanoparticles containing L protein (bio-nanocapsules: BNCs) bind scavenger receptor class B type 1 (SR-B1). In this study, we examined the binding of Mry47 to SR-B1. (2) Methods: The binding and endocytosis of fluorescence-labeled Myr47 to SR-B1 (and its mutants)-green fluorescence protein (GFP) fusion proteins expressed in HEK293T cells were analyzed using flow cytometry and laser scanning microscopy (LSM). Various ligand-binding properties were compared between SR-B1-GFP and NTCP-GFP. Furthermore, the binding of biotinylated Myr47 to SR-B1-GFP expressed on HEK293T cells was analyzed via pull-down assays using a crosslinker and streptavidin-conjugated beads. (3) Conclusions: SR-B1 bound not only Myr47 but also its myristoylated analog and BNCs, but failed to bind a peptide without myristoylation. However, NTCP only bound Myr47 among the ligands tested. Studies using SR-B1 mutants suggested that both BNCs and Myr47 bind to similar sites of SR-B1. Crosslinking studies indicated that Myr47 binds preferentially SR-B1 multimer than monomer in both HEK293T and HepG2 cells.
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14
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Yang J, Lee J, Land MA, Lai S, Igoshin OA, St-Pierre F. A synthetic circuit for buffering gene dosage variation between individual mammalian cells. Nat Commun 2021; 12:4132. [PMID: 34226556 PMCID: PMC8257781 DOI: 10.1038/s41467-021-23889-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 05/19/2021] [Indexed: 02/06/2023] Open
Abstract
Precise control of gene expression is critical for biological research and biotechnology. However, transient plasmid transfections in mammalian cells produce a wide distribution of copy numbers per cell, and consequently, high expression heterogeneity. Here, we report plasmid-based synthetic circuits - Equalizers - that buffer copy-number variation at the single-cell level. Equalizers couple a transcriptional negative feedback loop with post-transcriptional incoherent feedforward control. Computational modeling suggests that the combination of these two topologies enables Equalizers to operate over a wide range of plasmid copy numbers. We demonstrate experimentally that Equalizers outperform other gene dosage compensation topologies and produce as low cell-to-cell variation as chromosomally integrated genes. We also show that episome-encoded Equalizers enable the rapid generation of extrachromosomal cell lines with stable and uniform expression. Overall, Equalizers are simple and versatile devices for homogeneous gene expression and can facilitate the engineering of synthetic circuits that function reliably in every cell.
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Affiliation(s)
- Jin Yang
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Jihwan Lee
- Systems, Synthetic, and Physical Biology Program, Rice University, Houston, TX, USA
| | - Michelle A Land
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Shujuan Lai
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Oleg A Igoshin
- Department of Bioengineering, Rice University, Houston, TX, USA
- Systems, Synthetic, and Physical Biology Program, Rice University, Houston, TX, USA
- Department of Biosciences, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - François St-Pierre
- Systems, Synthetic, and Physical Biology Program, Rice University, Houston, TX, USA.
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA.
- Department of Electrical and Computer Engineering, Rice University, Houston, TX, USA.
- Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA.
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15
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Effective delivery of STING agonist using exosomes suppresses tumor growth and enhances antitumor immunity. J Biol Chem 2021; 296:100523. [PMID: 33711340 PMCID: PMC8042450 DOI: 10.1016/j.jbc.2021.100523] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/01/2021] [Accepted: 03/05/2021] [Indexed: 12/20/2022] Open
Abstract
The Stimulator of Interferon Genes (STING) pathway is implicated in the innate immune response and is important in both oncogenesis and cancer treatment. Specifically, activation of the cytosolic DNA sensor STING in antigen-presenting cells (APCs) induces a type I interferon response and cytokine production that facilitates antitumor immune therapy. However, use of STING agonists (STINGa) as a cancer therapeutic has been limited by unfavorable pharmacological properties and targeting inefficiency due to rapid clearance and limited uptake into the cytosol. Exosomes, a class of extracellular vesicles shed by all cells are under consideration for their use as effective carriers of drugs owing to their innate ability to be taken up by cells and their biocompatibility for optimal drug biodistribution. Therefore, we engineered exosomes to deliver the STING agonist cyclic GMP-AMP (iExoSTINGa), to exploit their favorable pharmacokinetics and pharmacodynamics. Selective targeting of the STING pathway in APCs with iExoSTINGa was associated with superior potency compared with STINGa alone in suppressing B16F10 tumor growth. Moreover, iExoSTINGa showed superior uptake of STINGa into dendritic cells compared with STINGa alone, which led to increased accumulation of activated CD8+ T-cells and an antitumor immune response. Our study highlights the potential of exosomes in general, and iExoSTINGa specifically, in enhancing cancer therapy outcomes.
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16
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Martin SK, Tomida J, Wood RD. Disruption of DNA polymerase ζ engages an innate immune response. Cell Rep 2021; 34:108775. [PMID: 33626348 PMCID: PMC7990024 DOI: 10.1016/j.celrep.2021.108775] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 12/22/2020] [Accepted: 01/29/2021] [Indexed: 01/07/2023] Open
Abstract
In mammalian cells, specialized DNA polymerase ζ (pol ζ) contributes to genomic stability during normal DNA replication. Disruption of the catalytic subunit Rev3l is toxic and results in constitutive chromosome damage, including micronuclei. As manifestations of this genomic stress are unknown, we examined the transcriptome of pol ζ-defective cells by RNA sequencing (RNA-seq). Expression of 1,117 transcripts is altered by ≥4-fold in Rev3l-disrupted cells, with a pattern consistent with an induction of an innate immune response. Increased expression of interferon-stimulated genes at the mRNA and protein levels in pol ζ-defective cells is driven by the cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS)-signaling partner stimulator of interferon genes (STING) pathway. Expression of key interferon-stimulated chemokines is elevated in basal epithelial mouse skin cells with a disruption of Rev3l. These results indicate that the disruption of pol ζ may simultaneously increase sensitivity to genotoxins and potentially engage parts of the innate immune response, which could add an additional benefit to targeting pol ζ in cancer therapies.
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Affiliation(s)
- Sara K Martin
- Department of Epigenetics & Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78507, USA; The University of Texas MD Anderson Cancer Center, UT Health Graduate School of Biomedical Sciences, Houston, TX, USA
| | - Junya Tomida
- Department of Epigenetics & Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78507, USA
| | - Richard D Wood
- Department of Epigenetics & Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78507, USA; The University of Texas MD Anderson Cancer Center, UT Health Graduate School of Biomedical Sciences, Houston, TX, USA.
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17
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Ahangarpour M, Kavianinia I, Harris PWR, Brimble MA. Photo-induced radical thiol-ene chemistry: a versatile toolbox for peptide-based drug design. Chem Soc Rev 2021; 50:898-944. [PMID: 33404559 DOI: 10.1039/d0cs00354a] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
While the global market for peptide/protein-based therapeutics is witnessing significant growth, the development of peptide drugs remains challenging due to their low oral bioavailability, poor membrane permeability, and reduced metabolic stability. However, a toolbox of chemical approaches has been explored for peptide modification to overcome these obstacles. In recent years, there has been a revival of interest in photoinduced radical thiol-ene chemistry as a powerful tool for the construction of therapeutic peptides.
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Affiliation(s)
- Marzieh Ahangarpour
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand.
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18
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Abstract
Two studies published in this issue of JEM, by Lepelley et al. (https://doi.org/10.1084/jem.20200600) and Deng et al. (https://doi.org/10.1084/jem.20201045), and two additional manuscripts by Mukai et al. (https://doi.org/10.1101/2020.05.20.107664 Preprint v1) and Steiner et al. (https://doi.org/10.1101/2020.07.09.194399 Preprint v1) demonstrate that COPA syndrome-associated high interferon titers are linked to mutations in COPA preventing STING's retrieval from the Golgi back to the ER and thereby causing chronic immune activation.
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Affiliation(s)
- Sophie Rivara
- Global Health Institute, Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Andrea Ablasser
- Global Health Institute, Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
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