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Chaumont L, Peruzzi M, Huetz F, Raffy C, Le Hir J, Minke J, Boudinot P, Collet B. Salmonid Double-stranded RNA-Dependent Protein Kinase Activates Apoptosis and Inhibits Protein Synthesis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 213:700-717. [PMID: 39058317 DOI: 10.4049/jimmunol.2400076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 06/30/2024] [Indexed: 07/28/2024]
Abstract
dsRNA-dependent protein kinase R (PKR) is a key factor of innate immunity. It is involved in translation inhibition, apoptosis, and enhancement of the proinflammatory and IFN responses. However, how these antiviral functions are conserved during evolution remains largely unknown. Overexpression and knockout studies in a Chinook salmon (Oncorhynchus tshawytscha) cell line were conducted to assess the role of salmonid PKR in the antiviral response. Three distinct mRNA isoforms from a unique pkr gene, named pkr-fl (full length), pkr-ml (medium length) and pkr-sl (short length), were cloned and a pkr-/- clonal fish cell line was developed using CRISPR/Cas9 genome editing. PKR-FL includes an N-terminal dsRNA-binding domain and a C-terminal kinase domain, whereas PKR-ML and PKR-SL display a truncated or absent kinase domain, respectively. PKR-FL is induced during IFNA2 stimulation but not during viral hemorrhagic septicemia virus (VHSV) infection. Overexpression experiments showed that only PKR-FL possesses antiviral functions, including activation of apoptosis and inhibition of de novo protein synthesis. Knockout experiments confirmed that PKR is involved in apoptosis activation during the late stage of VHSV infection. Endogenous PKR also plays a critical role in translation inhibition upon poly(I:C) transfection after IFNA2 treatment. It is, however, not involved in translational arrest during VHSV infection. Extra- and intracellular titrations showed that endogenous PKR does not directly inhibit viral replication but apparently favors virion release into the supernatant, likely by triggering late apoptosis. Altogether, our data confirm that salmonid PKR has conserved molecular functions that VHSV appears to bypass with subversion strategies.
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Affiliation(s)
- Lise Chaumont
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jouy-en-Josas, France
| | - Mathilde Peruzzi
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jouy-en-Josas, France
| | - François Huetz
- Unit of Antibodies in Therapy and Pathology, UMR 1222 INSERM, Institut Pasteur, Paris, France
| | | | | | | | - Pierre Boudinot
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jouy-en-Josas, France
| | - Bertrand Collet
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jouy-en-Josas, France
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2
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Mao R, Zhu Z, Yang F, Sun D, Zhou X, Cao W, Qin X, Dang W, Liu H, Tian H, Zhang K, Wu Q, Liu X, Zheng H. Picornavirus VP3 protein induces autophagy through the TP53-BAD-BAX axis to promote viral replication. Autophagy 2024; 20:1928-1947. [PMID: 38752369 PMCID: PMC11346532 DOI: 10.1080/15548627.2024.2350270] [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: 07/17/2023] [Revised: 04/09/2024] [Accepted: 04/25/2024] [Indexed: 05/28/2024] Open
Abstract
Macroautophagy/autophagy and apoptosis are pivotal interconnected host cell responses to viral infection, including picornaviruses. Here, the VP3 proteins of picornaviruses were determined to trigger autophagy, with the autophagic flux being triggered by the TP53-BAD-BAX axis. Using foot-and-mouth disease virus (FMDV) as a model system, we unraveled a novel mechanism of how picornavirus hijacks autophagy to bolster viral replication and enhance pathogenesis. FMDV infection induced both autophagy and apoptosis in vivo and in vitro. FMDV VP3 protein facilitated the phosphorylation and translocation of TP53 from the nucleus into the mitochondria, resulting in BAD-mediated apoptosis and BECN1-mediated autophagy. The amino acid Gly129 in VP3 is essential for its interaction with TP53, and crucial for induction of autophagy and apoptosis. VP3-induced autophagy and apoptosis are both essential for FMDV replication, while, autophagy plays a more important role in VP3-mediated pathogenesis. Mutation of Gly129 to Ala129 in VP3 abrogated the autophagic regulatory function of VP3, which significantly decreased the viral replication and pathogenesis of FMDV. This suggested that VP3-induced autophagy benefits viral replication and pathogenesis. Importantly, this Gly is conserved and showed a common function in various picornaviruses. This study provides insight for developing broad-spectrum antivirals and genetic engineering attenuated vaccines against picornaviruses.Abbreviations: 3-MA, 3-methyladenine; ATG, autophagy related; BAD, BCL2 associated agonist of cell death; BAK1, BCL2 antagonist/killer 1; BAX, BCL2 associated X, apoptosis regulator; BBC3/PUMA, BCL2 binding component 3; BCL2, BCL2 apoptosis regulator; BID, BH3 interacting domain death agonist; BIP-V5, BAX inhibitor peptide V5; CFLAR/FLIP, CASP8 and FADD like apoptosis regulator; CPE, cytopathic effects; CQ, chloroquine; CV, coxsackievirus; DAPK, death associated protein kinase; DRAM, DNA damage regulated autophagy modulator; EV71, enterovirus 71; FMDV, foot-and-mouth disease virus; HAV, hepatitis A virus; KD, knockdown; MAP1LC3/LC3, microtubule associated protein 1 light chain 3; MOI, multiplicity of infection; MTOR, mechanistic target of rapamycin kinase; PML, promyelocytic leukemia; PV, poliovirus; SVA, Seneca Valley virus; TCID50, 50% tissue culture infectious doses; TOR, target of rapamycin. TP53/p53, tumor protein p53; WCL, whole-cell lysate.
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Affiliation(s)
- Ruoqing Mao
- 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
| | - 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
| | - Dehui Sun
- 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
| | - Xiaoli Zhou
- 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
| | - Xiaodong Qin
- 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
| | - Wen Dang
- 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
| | - Huanan 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
| | - Hong Tian
- 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
| | - Keshan Zhang
- 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
| | - Qingfeng Wu
- Analysis and Test Group, Center for Technical Development and Analysis Service, Institute of Modern Physics, Chinese Academy of 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
| | - 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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3
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Zhang W, Chen Y, Yang F, Zhang H, Su T, Wang J, Zhang Y, Song X. Antiviral effect of palmatine against infectious bronchitis virus through regulation of NF-κB/IRF7/JAK-STAT signalling pathway and apoptosis. Br Poult Sci 2024; 65:119-128. [PMID: 38166582 DOI: 10.1080/00071668.2023.2296929] [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: 07/25/2023] [Accepted: 11/29/2023] [Indexed: 01/04/2024]
Abstract
1. Infectious bronchitis virus (IBV), a gamma-coronavirus, can infect chickens of all ages and leads to an acute contact respiratory infection. This study evaluated the anti-viral activity of palmatine, a natural non-flavonoid alkaloid, against IBV in chicken embryo kidney (CEK) cells.2. The half toxic concentration (CC50) of palmatine was 672.92 μM, the half inhibitory concentration (IC50) of palmatine against IBV was 7.76 μM and the selection index (SI) was 86.74.3. Mode of action assay showed that palmatine was able to directly inactivate IBV and inhibited the adsorption, penetration and intracellular replication of IBV.4. Palmatine significantly upregulated TRAF6, TAB1 and IKK-β compared with the IBV-infected group, leading to the increased expressions of pro-inflammatory cytokines IL-1β and TNF-α in the downstream NF-κB signalling pathway.5. Palmatine significantly up-regulated the levels of MDA5, MAVS, IRF7, IFN-α and IFN-β in the IRF7 pathway, inducing type I interferon production. It up-regulated the expression of 2'5'-oligoadenylate synthase (OAS) in the JAK-STAT pathway.6. IBV infection induced cell apoptosis and palmatine-treatment delayed the process of apoptosis by regulation of the expression of apoptosis-related genes (BAX, BCL-2, CASPASE-3 and CASPASE-8).7. Palmatine could exert anti-IBV activity through regulation of NF-κB/IRF7/JAK-STAT signalling pathways and apoptosis, providing a theoretical basis for the utilisation of palmatine to treat IBV infection.
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Affiliation(s)
- W Zhang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Y Chen
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - F Yang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - H Zhang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - T Su
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - J Wang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Y Zhang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - X Song
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
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4
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Farooq M, Abd-Elsalam RM, Ratcliff N, Hassan MSH, Najimudeen SM, Cork SC, Checkley S, Niu YD, Abdul-Careem MF. Comparative pathogenicity of infectious bronchitis virus Massachusetts and Delmarva (DMV/1639) genotypes in laying hens. Front Vet Sci 2024; 10:1329430. [PMID: 38313768 PMCID: PMC10834656 DOI: 10.3389/fvets.2023.1329430] [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: 10/28/2023] [Accepted: 12/29/2023] [Indexed: 02/06/2024] Open
Abstract
Infectious bronchitis (IB) is a highly contagious and acute viral disease of chicken caused by the infectious bronchitis virus (IBV) of the family Coronaviridae. Even with extensive vaccination against IB by the poultry industry, the occurrence of new IBV genotypes is a continuous challenge encountered by the global poultry industry. This experiment was designed to compare the pathogenicity of two IBV strains belonging to Massachusetts (Mass) and Delmarva DMV/1639 genotypes. Specific pathogen-free laying hens were challenged during the peak of production (30 weeks), keeping a mock-infected control group. During 21 days of observation following infection, a significant drop in egg production with miss-shaped and soft shells was observed in the DMV/1639 IBV-infected hens only. The DMV/1639 IBV infected group showed prolonged and higher cloacal viral shedding compared with the Mass IBV-infected group. At the end of the study (21 days post-infection), the viral genome loads in the respiratory, urogenital, and immune tissues were significantly higher in the DMV/1639 IBV-infected group compared with the Mass IBV-infected group. Macroscopic lesions such as distorted ova leading to egg peritonitis were observed only in the DMV/1639 IBV-infected group. Moreover, microscopic lesion scores were significantly higher in the lung, kidney, cecal tonsils, and oviduct of the DMV/1639 IBV-infected group compared with the Mass IBV-infected group. Finally, the apoptosis index in the kidney, ovary, magnum, isthmus, and shell gland was significantly higher in the DMV/1639 IBV-infected group compared with the control and Mass-infected groups. This study examined the pathogenicity of two IBV genotypes that are impacting the layer industry in North America.
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Affiliation(s)
- Muhammad Farooq
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Reham M Abd-Elsalam
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
- Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Natalya Ratcliff
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Mohamed S H Hassan
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
- Department of Avian and Rabbit Medicine, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Shahnas M Najimudeen
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Susan C Cork
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Sylvia Checkley
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Yan Dong Niu
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Mohamed Faizal Abdul-Careem
- Health Research Innovation Center, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
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5
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Lee JW, Kim HW, Yu AR, Yoon HS, Kang M, Park HW, Lee SK, Whang J, Kim JS. Differential Immune Responses and Underlying Mechanisms of Metabolic Reprogramming in Smooth and Rough Variants of Mycobacterium peregrinum Infections. Pathogens 2023; 12:1446. [PMID: 38133329 PMCID: PMC10747217 DOI: 10.3390/pathogens12121446] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023] Open
Abstract
Mycobacterium peregrinum (Mpgm) is a rapidly growing mycobacteria that is classified as a nontuberculous mycobacterium (NTM) and is commonly found in environmental sources such as soil, water, and animals. Mpgm is considered an opportunistic pathogen that causes infection in immunocompromised individuals or those with underlying medical conditions. Although there have been clinical reports on Mpgm, reports of the immune response and metabolic reprogramming have not been published. Thus, we studied standard Mpgm-ATCC and two clinical strains (Mpgm-S and Mpgm-R) using macrophages and mouse bone marrow-derived cells. Mpgm has two types of colony morphologies: smooth and rough. We grew all strains on the 7H10 agar medium to visually validate the morphology. Cytokine levels were measured via ELISA and real-time PCR. The changes in mitochondrial function and glycolysis in Mpgm-infected macrophages were measured using an extracellular flux analyzer. Mpgm-S-infected macrophages showed elevated levels of inflammatory cytokines, including interleukin (IL)-6, IL-12p40, and tumor necrosis factor (TNF)-α, compared to Mpgm-ATCC- and Mpgm-R-infected macrophages. Additionally, our findings revealed metabolic changes in Mpgm-ATCC and two clinical strains (Mpgm-S and Mpgm-R) during infection; significant changes were observed in the mitochondrial respiration, extracellular acidification, and the oxygen consumption of BMDMs upon Mpgm-S infection. In summary, within the strains examined, Mpgm-S displayed greater virulence, triggered a heightened immune response, and induced more profound shifts in bioenergetic metabolism than Mpgm-ATCC and Mpgm-R. This study is the first to document distinct immune responses and metabolic reorganization following Mpgm infection. These findings lay a crucial foundation for further investigations into the pathogenesis of Mpgm.
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Affiliation(s)
- Ji Won Lee
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea; (J.W.L.); (H.W.K.); (A.-R.Y.); (H.S.Y.)
| | - Ho Won Kim
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea; (J.W.L.); (H.W.K.); (A.-R.Y.); (H.S.Y.)
| | - A-Reum Yu
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea; (J.W.L.); (H.W.K.); (A.-R.Y.); (H.S.Y.)
| | - Hoe Sun Yoon
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea; (J.W.L.); (H.W.K.); (A.-R.Y.); (H.S.Y.)
| | - Minji Kang
- Korea Mycobacterium Resource Center (KMRC), Department of Research and Development, The Korean Institute of Tuberculosis, Osong 28158, Republic of Korea;
| | - Hwan-Woo Park
- Department of Cell Biology, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea;
| | - Sung Ki Lee
- Department of Obstetrics and Gynecology, Konyang University Hospital, Daejeon 35365, Republic of Korea;
| | - Jake Whang
- Korea Mycobacterium Resource Center (KMRC), Department of Research and Development, The Korean Institute of Tuberculosis, Osong 28158, Republic of Korea;
| | - Jong-Seok Kim
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea; (J.W.L.); (H.W.K.); (A.-R.Y.); (H.S.Y.)
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6
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Garrido-Huarte JL, Fita-Torró J, Viana R, Pascual-Ahuir A, Proft M. Severe acute respiratory syndrome coronavirus-2 accessory proteins ORF3a and ORF7a modulate autophagic flux and Ca2+ homeostasis in yeast. Front Microbiol 2023; 14:1152249. [PMID: 37077240 PMCID: PMC10106705 DOI: 10.3389/fmicb.2023.1152249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/21/2023] [Indexed: 04/05/2023] Open
Abstract
Virus infection involves the manipulation of key host cell functions by specialized virulence proteins. The Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) small accessory proteins ORF3a and ORF7a have been implicated in favoring virus replication and spreading by inhibiting the autophagic flux within the host cell. Here, we apply yeast models to gain insights into the physiological functions of both SARS-CoV-2 small open reading frames (ORFs). ORF3a and ORF7a can be stably overexpressed in yeast cells, producing a decrease in cellular fitness. Both proteins show a distinguishable intracellular localization. ORF3a localizes to the vacuolar membrane, whereas ORF7a targets the endoplasmic reticulum. Overexpression of ORF3a and ORF7a leads to the accumulation of Atg8 specific autophagosomes. However, the underlying mechanism is different for each viral protein as assessed by the quantification of the autophagic degradation of Atg8-GFP fusion proteins, which is inhibited by ORF3a and stimulated by ORF7a. Overexpression of both SARS-CoV-2 ORFs decreases cellular fitness upon starvation conditions, where autophagic processes become essential. These data confirm previous findings on SARS-CoV-2 ORF3a and ORF7a manipulating autophagic flux in mammalian cell models and are in agreement with a model where both small ORFs have synergistic functions in stimulating intracellular autophagosome accumulation, ORF3a by inhibiting autophagosome processing at the vacuole and ORF7a by promoting autophagosome formation at the ER. ORF3a has an additional function in Ca2+ homeostasis. The overexpression of ORF3a confers calcineurin-dependent Ca2+ tolerance and activates a Ca2+ sensitive FKS2-luciferase reporter, suggesting a possible ORF3a-mediated Ca2+ efflux from the vacuole. Taken together, we show that viral accessory proteins can be functionally investigated in yeast cells and that SARS-CoV-2 ORF3a and ORF7a proteins interfere with autophagosome formation and processing as well as with Ca2+ homeostasis from distinct cellular targets.
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Affiliation(s)
- José Luis Garrido-Huarte
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
| | - Josep Fita-Torró
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
| | - Rosa Viana
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
| | - Amparo Pascual-Ahuir
- Department of Biotechnology, Instituto de Biología Molecular y Celular de Plantas, Universitat Politècnica de València UPV, Valencia, Spain
- *Correspondence: Amparo Pascual-Ahuir,
| | - Markus Proft
- Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia IBV-CSIC, Valencia, Spain
- Markus Proft,
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Azerigyik FA, Faizah AN, Kobayashi D, Amoa-Bosompem M, Matsumura R, Kai I, Sasaki T, Higa Y, Isawa H, Iwanaga S, Ishino T. Evaluating the mosquito host range of Getah virus and the vector competence of selected medically important mosquitoes in Getah virus transmission. Parasit Vectors 2023; 16:99. [PMID: 36922882 PMCID: PMC10015795 DOI: 10.1186/s13071-023-05713-4] [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: 12/29/2022] [Accepted: 02/22/2023] [Indexed: 03/17/2023] Open
Abstract
BACKGROUND The Getah virus (GETV) is a mosquito-borne Alphavirus (family Togaviridae) that is of significant importance in veterinary medicine. It has been associated with major polyarthritis outbreaks in animals, but there are insufficient data on its clinical symptoms in humans. Serological evidence of GETV exposure and the risk of zoonotic transmission makes GETV a potentially medically relevant arbovirus. However, minimal emphasis has been placed on investigating GETV vector transmission, which limits current knowledge of the factors facilitating the spread and outbreaks of GETV. METHODS To examine the range of the mosquito hosts of GETV, we selected medically important mosquitoes, assessed them in vitro and in vivo and determined their relative competence in virus transmission. The susceptibility and growth kinetics of GETVs in various mosquito-derived cell lines were also determined and quantified using plaque assays. Vector competency assays were also conducted, and quantitative reverse transcription-PCR and plaque assays were used to determine the susceptibility and transmission capacity of each mosquito species evaluated in this study. RESULTS GETV infection in all of the investigated mosquito cell lines resulted in detectable cytopathic effects. GETV reproduced the fastest in Culex tritaeniorhynchus- and Aedes albopictus-derived cell lines, as evidenced by the highest exponential titers we observed. Regarding viral RNA copy numbers, mosquito susceptibility to infection, spread, and transmission varied significantly between species. The highest vector competency indices for infection, dissemination and transmission were obtained for Cx. tritaeniorhynchus. This is the first study to investigate the ability of Ae. albopictus and Anopheles stephensi to transmit GETV, and the results emphasize the role and capacity of other mosquito species to transmit GETV upon exposure to GETV, in addition to the perceived vectors from which GETV has been isolated in nature. CONCLUSIONS This study highlights the importance of GETV vector competency studies to determine all possible transmission vectors, especially in endemic regions.
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Affiliation(s)
- Faustus Akankperiwen Azerigyik
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.,Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Astri Nur Faizah
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Daisuke Kobayashi
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Michael Amoa-Bosompem
- Department of Biomedical and Diagnostic Sciences, University of Tennessee, Knoxville, TN, USA
| | - Ryo Matsumura
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Izumi Kai
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Toshinori Sasaki
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Yukiko Higa
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Haruhiko Isawa
- Department of Medical Entomology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan.
| | - Shiroh Iwanaga
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.,Department of Molecular Protozoology, Research Center for Infectious Disease Control, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Tomoko Ishino
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Crosstalk between apoptosis and cytotoxic lymphocytes (CTLs) in the course of Lagovirus europaeus GI.1a infection in rabbits. J Vet Res 2023; 67:41-47. [PMID: 37008759 PMCID: PMC10062044 DOI: 10.2478/jvetres-2023-0008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 02/13/2023] [Indexed: 03/02/2023] Open
Abstract
Abstract
Introduction
Lagovirus europaeus is a single-stranded RNA virus causing an acute fatal disease in wild and domestic rabbits around the world. Studies have shown that the pivotal process impacting the immune response against the disease is apoptosis, registered mainly in hepatocytes and in peripheral blood, together with an increased number of cytotoxic lymphocytes (CTLs). It is known that cytotoxic lymphocytes can induce target cells to undergo apoptosis on the pseudoreceptor pathway, such apoptosis having been found in several acute and chronic viral infections. The study aimed to assess the crosstalk between the apoptosis of peripheral blood lymphocytes and CD8+ T lymphocytes (as CTLs) in rabbits infected with 6 Lagovirus europaeus GI.1a viruses.
Material and Methods
Sixty rabbits of Polish hybrid breed comprising both sexes and weighing 3.2–4.2 kg were the experimental group, and an identical group was the control. Each of the six GI.1a Lagovirus europaeus viruses was inoculated into ten experimental rabbits. Control rabbits received glycerol as a placebo. Flow cytometric analysis was performed on blood from the study and control group animals for peripheral blood lymphocyte apoptosis and CTL percentage determination.
Results
The activation of apoptosis in peripheral blood lymphocytes was recorded from 4 h post inoculation (p.i.) up to 36 h p.i. The percentage of CTLs in the total blood pool decreased from 8 to 36 h p.i. A negative correlation between apoptosis of lymphocytes and the number of CTLs was proven.
Conclusion
This may be the first evidence of virus-induced CTL apoptosis in Lagovirus europaeus GI.1a infection.
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Shishova A, Dyugay I, Fominykh K, Baryshnikova V, Dereventsova A, Turchenko Y, Slavokhotova AA, Ivin Y, Dmitriev SE, Gmyl A. Enteroviruses Manipulate the Unfolded Protein Response through Multifaceted Deregulation of the Ire1-Xbp1 Pathway. Viruses 2022; 14:v14112486. [PMID: 36366584 PMCID: PMC9699254 DOI: 10.3390/v14112486] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/30/2022] [Accepted: 11/04/2022] [Indexed: 11/12/2022] Open
Abstract
Many viruses are known to trigger endoplasmic reticulum (ER) stress in host cells, which in turn can develop a protective unfolded protein response (UPR). Depending on the conditions, the UPR may lead to either cell survival or programmed cell death. One of three UPR branches involves the upregulation of Xbp1 transcription factor caused by the unconventional cytoplasmic splicing of its mRNA. This process is accomplished by the phosphorylated form of the endoribonuclease/protein kinase Ire1/ERN1. Here, we show that the phosphorylation of Ire1 is up-regulated in HeLa cells early in enterovirus infection but down-regulated at later stages. We also find that Ire1 is cleaved in poliovirus- and coxsackievirus-infected HeLa cells 4-6 h after infection. We further show that the Ire1-mediated Xbp1 mRNA splicing is repressed in infected cells in a time-dependent manner. Thus, our results demonstrate the ability of enteroviruses to actively modulate the Ire1-Xbp1 host defensive pathway by inducing phosphorylation and proteolytic cleavage of the ER stress sensor Ire1, as well as down-regulating its splicing activity. Inactivation of Ire1 could be a novel mode of the UPR manipulation employed by viruses to modify the ER stress response in the infected cells.
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Affiliation(s)
- Anna Shishova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
- Institute for Translational Medicine and Biotechnology, First Moscow State Medical University (Sechenov University), 117418 Moscow, Russia
- Correspondence: (A.S.); (S.E.D.)
| | - Ilya Dyugay
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Ksenia Fominykh
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Victoria Baryshnikova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Alena Dereventsova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Yuriy Turchenko
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Anna A. Slavokhotova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Yury Ivin
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
| | - Sergey E. Dmitriev
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
- Correspondence: (A.S.); (S.E.D.)
| | - Anatoly Gmyl
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products RAS (FSBSI “Chumakov FSC R&D IBP RAS”), 108819 Moscow, Russia
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10
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Zamzam SH, Ghalyanchilangeroudi A, Khosravi AR. Comparative trachea transcriptome analysis in SPF broiler chickens infected with avian infectious bronchitis and avian influenza viruses. Virus Genes 2022; 58:203-213. [PMID: 35301621 DOI: 10.1007/s11262-022-01893-w] [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: 11/02/2021] [Accepted: 03/02/2022] [Indexed: 11/30/2022]
Abstract
Infectious bronchitis virus (IBV) and avian influenza virus (AIV) are two major respiratory infections in chickens. The coinfection of these viruses can cause significant financial losses and severe complications in the poultry industry across the world. To examine transcriptome profile changes during the early stages of infection, differential transcriptional profiles in tracheal tissue of three infected groups (i.e., IBV, AIV, and coinfected) were compared with the control group. Specific-pathogen-free chickens were challenged with Iranian variant-2-like IBV (IS/1494), UT-Barin isolates of H9N2 (A/chicken/Mashhad/UT-Barin/2017), and IBV-AIV coinfection; then, RNA was extracted from tracheal tissue. The Illumina RNA-sequencing (RNA-seq) technique was employed to investigate changes in the Transcriptome. Up- and downregulated differentially expressed genes (DEGs) were detected in the trachea transcriptome of all groups. The Kyoto Encyclopedia of Genes and Genomes pathway and Gene Ontology databases were examined to identify possible relationships between DEGs. In the experimental groups, upregulated genes were higher compared to downregulated genes. A more severe immune response was observed in the coinfected group; further, cytokine-cytokine receptor interaction, RIG-I-like receptor signaling, Toll-like receptor signaling, NOD-like receptor signaling, Janus kinase/signal transducer, and activator of transcription, and apoptotic pathways were important upregulated genes in this group. The findings of this paper may give a better understanding of transcriptome changes in the trachea during the early stages of infection with these viruses.
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Affiliation(s)
- Seyed Hossein Zamzam
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, PO Box: 1419963111, Tehran, Islamic Republic of Iran
| | - Arash Ghalyanchilangeroudi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, PO Box: 1419963111, Tehran, Islamic Republic of Iran.
| | - Ali Reza Khosravi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, PO Box: 1419963111, Tehran, Islamic Republic of Iran
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11
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Mukesh RK, Kalam AA, Nag J, Jaikumar VS, Kunnakkadan U, Kumar NA, Suma SM, Rajavelu A, Johnson JB. Chandipura virus induces cell death in cancer cell lines of human origin and promotes tumor regression in vivo. MOLECULAR THERAPY-ONCOLYTICS 2021; 23:254-265. [PMID: 34761105 PMCID: PMC8554107 DOI: 10.1016/j.omto.2021.09.009] [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: 04/23/2021] [Revised: 09/20/2021] [Accepted: 09/29/2021] [Indexed: 11/25/2022]
Abstract
Chandipura virus (CHPV) is an emerging human pathogen of great clinical significance. In this study, we have investigated the susceptibility pattern of both normal and cancer cell lines of human origin to wild-type (wt) CHPV in order to explore the possibility of developing CHPV as an oncolytic vector (OV). Marked cytopathic effect along with enhanced virus output was observed in cancer cell lines (HeLa, A549, U-138, PC-3, and HepG2) in comparison to normal human adult dermal fibroblast (HADF) cells. At an MOI of 0.1, cancer cell lines were differentially susceptible to CHPV, with cells like HeLa and U-138 having pronounced cell death, while the PC-3 were comparatively resistant. All cell lines used in the study except U-138 restricted CHPV infection to varying degrees with IFN-β pre-treatment and supplementation of interferon (IFN) could neither activate the IFN signaling pathway in U-138 cells. Finally, U-138 tumor xenografts established in non-obese diabetic severe combined immunodeficiency (NOD/SCID) mice showed significant delay in tumor growth in the CHPV-challenged animals. Thus, targeted cytopathic effect in cancer cells at a very low dose with restricted replication in normal cells offers a rationale to exploit CHPV as an oncolytic vector in the future.
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Affiliation(s)
- Reshma Koolaparambil Mukesh
- Pathogen Biology, Virology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India.,Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Azeem Abdul Kalam
- Pathogen Biology, Virology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India
| | - Joydeep Nag
- Pathogen Biology, Virology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India.,Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Vishnu Sunil Jaikumar
- Animal Research Facility, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India
| | - Umerali Kunnakkadan
- Pathogen Biology, Virology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India.,Department of Biotechnology, University of Kerala, Thiruvananthapuram 695581, Kerala, India
| | - Nisha Asok Kumar
- Pathogen Biology, Virology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India.,Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | | | - Arumugam Rajavelu
- Pathogen Biology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India
| | - John Bernet Johnson
- Pathogen Biology, Virology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram 695014, Kerala, India
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12
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Yong SJ. Diseased lungs may hinder COVID-19 development: A possible reason for the low prevalence of COPD in COVID-19 patients. Med Hypotheses 2021; 153:110628. [PMID: 34139599 PMCID: PMC8188770 DOI: 10.1016/j.mehy.2021.110628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 05/28/2021] [Accepted: 06/07/2021] [Indexed: 11/29/2022]
Abstract
Presently, it remains unclear why the prevalence of lung diseases, namely chronic obstructive pulmonary disease (COPD), is much lower than other medical comorbidities and the general population among patients with coronavirus disease 2019 (COVID-19). If COVID-19 is a respiratory disease, why is COPD not the leading risk factor for contracting COVID-19? The same odd phenomenon was also observed with other pathogenic human coronaviruses causing severe acute respiratory distress syndrome (SARS) and Middle East respiratory syndrome (MERS), but not other respiratory viral infections such as influenza and respiratory syncytial viruses. One commonly proposed reason for the low COPD rates among COVID-19 patients is the usage of inhaled corticosteroids or bronchodilators that may protect against COVID-19. However, another possible reason not discussed elsewhere is that lungs in a diseased state may not be conducive for the severe acute respiratory distress syndrome coronavirus 2 (SARS-CoV-2) to establish COVID-19. For one, COPD causes mucous plugging in large and small airways, which may hinder SARS-CoV-2 from reaching deeper parts of the lungs (i.e., alveoli). Thus, SARS-CoV-2 may only localize to the upper respiratory tract of persons with COPD, causing mild or asymptomatic infections requiring no hospital attention. Even if SARS-CoV-2 reaches the alveoli, cells therein are probably under a heavy burden of endoplasmic reticulum (ER) stress and extensively damaged where it may not support efficient viral replication. As a result, limited SARS-CoV-2 virions would be produced in diseased lungs, preventing the development of COVID-19.
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Affiliation(s)
- Shin Jie Yong
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Selangor, Malaysia.
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13
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Liu J, Cvirkaite-Krupovic V, Baquero DP, Yang Y, Zhang Q, Shen Y, Krupovic M. Virus-induced cell gigantism and asymmetric cell division in archaea. Proc Natl Acad Sci U S A 2021; 118:e2022578118. [PMID: 33782110 PMCID: PMC8054024 DOI: 10.1073/pnas.2022578118] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Archaeal viruses represent one of the most mysterious parts of the global virosphere, with many virus groups sharing no evolutionary relationship to viruses of bacteria or eukaryotes. How these viruses interact with their hosts remains largely unexplored. Here we show that nonlytic lemon-shaped virus STSV2 interferes with the cell cycle control of its host, hyperthermophilic and acidophilic archaeon Sulfolobus islandicus, arresting the cell cycle in the S phase. STSV2 infection leads to transcriptional repression of the cell division machinery, which is homologous to the eukaryotic endosomal sorting complexes required for transport (ESCRT) system. The infected cells grow up to 20-fold larger in size, have 8,000-fold larger volume compared to noninfected cells, and accumulate massive amounts of viral and cellular DNA. Whereas noninfected Sulfolobus cells divide symmetrically by binary fission, the STSV2-infected cells undergo asymmetric division, whereby giant cells release normal-sized cells by budding, resembling the division of budding yeast. Reinfection of the normal-sized cells produces a new generation of giant cells. If the CRISPR-Cas system is present, the giant cells acquire virus-derived spacers and terminate the virus spread, whereas in its absence, the cycle continues, suggesting that CRISPR-Cas is the primary defense system in Sulfolobus against STSV2. Collectively, our results show how an archaeal virus manipulates the cell cycle, transforming the cell into a giant virion-producing factory.
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Affiliation(s)
- Junfeng Liu
- Archaeal Virology Unit, Institut Pasteur, 75015 Paris, France
- CRISPR and Archaea Biology Research Center, State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, 266237 Qingdao, China
| | | | - Diana P Baquero
- Archaeal Virology Unit, Institut Pasteur, 75015 Paris, France
| | - Yunfeng Yang
- CRISPR and Archaea Biology Research Center, State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, 266237 Qingdao, China
| | - Qi Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 650500 Kunming, China
| | - Yulong Shen
- CRISPR and Archaea Biology Research Center, State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, 266237 Qingdao, China;
| | - Mart Krupovic
- Archaeal Virology Unit, Institut Pasteur, 75015 Paris, France;
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14
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Gioti K, Kottaridi C, Voyiatzaki C, Chaniotis D, Rampias T, Beloukas A. Animal Coronaviruses Induced Apoptosis. Life (Basel) 2021; 11:185. [PMID: 33652685 PMCID: PMC7996831 DOI: 10.3390/life11030185] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 02/06/2023] Open
Abstract
Apoptosis is a form of programmed death that has also been observed in cells infected by several viruses. It is considered one of the most critical innate immune mechanisms that limits pathogen proliferation and propagation before the initiation of the adaptive immune response. Recent studies investigating the cellular responses to SARS-CoV and SARS-CoV-2 infection have revealed that coronaviruses can alter cellular homeostasis and promote cell death, providing evidence that the modulation of apoptotic pathways is important for viral replication and propagation. Despite the genetic diversity among different coronavirus clades and the infection of different cell types and several hosts, research studies in animal coronaviruses indicate that apoptosis in host cells is induced by common molecular mechanisms and apoptotic pathways. We summarize and critically review current knowledge on the molecular aspects of cell-death regulation during animal coronaviruses infection and the viral-host interactions to this process. Future research is expected to lead to a better understanding of the regulation of cell death during coronavirus infection. Moreover, investigating the role of viral proteins in this process will help us to identify novel antiviral targets related to apoptotic signaling pathways.
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Affiliation(s)
- Katerina Gioti
- Department of Biomedical Sciences, University of West Attica, 12243 Athens, Greece; (K.G.); (C.K.); (C.V.); (D.C.)
| | - Christine Kottaridi
- Department of Biomedical Sciences, University of West Attica, 12243 Athens, Greece; (K.G.); (C.K.); (C.V.); (D.C.)
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Chrysa Voyiatzaki
- Department of Biomedical Sciences, University of West Attica, 12243 Athens, Greece; (K.G.); (C.K.); (C.V.); (D.C.)
| | - Dimitrios Chaniotis
- Department of Biomedical Sciences, University of West Attica, 12243 Athens, Greece; (K.G.); (C.K.); (C.V.); (D.C.)
| | - Theodoros Rampias
- Biomedical Research Foundation of the Academy of Athens, Basic Research Center, 11527 Athens, Greece
| | - Apostolos Beloukas
- Department of Biomedical Sciences, University of West Attica, 12243 Athens, Greece; (K.G.); (C.K.); (C.V.); (D.C.)
- Institute of Infection & Global Health, University of Liverpool, Liverpool L69 7BE, UK
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15
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Lord JS, Bonsall MB. The evolutionary dynamics of viruses: virion release strategies, time delays and fitness minima. Virus Evol 2021; 7:veab039. [PMID: 34221452 PMCID: PMC8242231 DOI: 10.1093/ve/veab039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Viruses exhibit a diverse array of strategies for infecting host cells and for virion release after replication. Cell exit strategies generally involve either budding from the cell membrane or killing the host cell. The conditions under which either is at a selective advantage is a key question in the evolutionary theory of viruses, with the outcome having potentially important impacts on the course of infection and pathogenicity. Although a plethora of external factors will influence the fitness of either strategy; here, we focus just on the effects of the physical properties of the system. We develop theoretical approaches to assess the effects of the time delays between initial infection and virion release. We show that the length of the delay before apoptosis is an important trait in virus evolutionary dynamics. Our results show that for a fixed time to apoptosis, intermediate delays lead to virus fitness that is lower than short times to apoptosis - leading to an apoptotic strategy - and long times to apoptosis - leading to a budding strategy at the between-cell level. At fitness minima, selection is expected to be disruptive and the potential for adaptive radiation in virus strategies is feasible. Hence, the physical properties of the system are sufficient to explain the existence of both budding and virus-induced apoptosis. The fitness functions presented here provide a formal basis for further work focusing on the evolutionary implications of trade-offs between time delays, intracellular replication and resulting mutation rates.
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Affiliation(s)
- Jennifer S Lord
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - Michael B Bonsall
- Mathematical Ecology Research Group, Department of Zoology, University of Oxford, Oxford OX1 3SZ, UK
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16
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Cui C, Liang Q, Tang X, Xing J, Sheng X, Zhan W. Differential Apoptotic Responses of Hemocyte Subpopulations to White Spot Syndrome Virus Infection in Fenneropenaeus chinensis. Front Immunol 2020; 11:594390. [PMID: 33365030 PMCID: PMC7750459 DOI: 10.3389/fimmu.2020.594390] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/05/2020] [Indexed: 11/13/2022] Open
Abstract
The apoptosis of hemocytes plays an essential function in shrimp immune defense against pathogen invasions. In order to further elucidate the differential apoptotic responses of the granulocytes and the hyalinocytes in Fenneropenaeus chinensis post WSSV infection, the characteristics of apoptotic dynamics and viral proliferation in total hemocytes and hemocyte subpopulations were respectively investigated in the present work. The results showed that the apoptotic rate of hemocytes changed significantly, and the apoptosis-related genes also showed significantly differential expression responses during WSSV infection. Interestingly, we found that the apoptotic rate of virus-negative hemocytes was significantly higher than that of virus-positive hemocytes in the early stage of WSSV infection, while it was significantly lower than that of virus-positive cells in the middle and late infection stages. The difference of apoptosis between virus-positive and virus-negative hemocytes seems to be an important way for the WSSV to destroy the host’s immune system and facilitate the virus spread at different infection stages. It was further found that the apoptosis rate of granulocytes was always significantly higher than that of hyalinocytes during WSSV infection, indicating that granulocytes have a stronger apoptotic response to WSSV infection. Moreover, a higher viral load was detected in granulocytes, and the density of granulocytes decreased more rapidly post WSSV infection, indicating that the granulocytes are more susceptible and vulnerable to WSSV infection compared with the hyalinocytes. These results collectively demonstrated that the apoptotic response in shrimp hemocytes was significantly influenced by the WSSV infection, and the differential apoptotic response of granulocytes and hyalinocytes to WSSV indicated the differences of antiviral mechanisms between the two hemocyte subpopulations.
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Affiliation(s)
- Chuang Cui
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, China
| | - Qianrong Liang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, China
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, China.,Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, China.,Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, China.,Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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17
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Lin MH, Chang SC, Chiu YC, Jiang BC, Wu TH, Hsu CH. Structural, Biophysical, and Biochemical Elucidation of the SARS-CoV-2 Nonstructural Protein 3 Macro Domain. ACS Infect Dis 2020; 6:2970-2978. [PMID: 32946224 PMCID: PMC7537548 DOI: 10.1021/acsinfecdis.0c00441] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Indexed: 12/16/2022]
Abstract
The pandemic outbreak of a novel coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has threatened the global public health and economy since late December 2019. SARS-CoV-2 encodes the conserved macro domain within nonstructural protein 3, which may reverse cellular ADP-ribosylation and potentially cut the signal of a viral infection in the cell. Herein, we report that the SARS-CoV-2 macro domain was examined as a poly-ADP-ribose (ADPR) binding module and possessed mono-ADPR cleavage enzyme activity. After confirming the ADPR binding ability via a biophysical approach, the X-ray crystal structure of the SARS-CoV-2 macro domain was determined and structurally compared with those of other viruses. This study provides structural, biophysical, and biochemical bases to further evaluate the role of the SARS-CoV-2 macro domain in the host response via ADP-ribose binding but also as a potential target for drug design against COVID-19.
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Affiliation(s)
- Meng-Hsuan Lin
- Genome and Systems Biology Degree
Program, National Taiwan University and Academia
Sinica, Taipei 10617,
Taiwan
| | - San-Chi Chang
- Department of Agricultural Chemistry,
National Taiwan University, Taipei
10617, Taiwan
| | - Yi-Chih Chiu
- Genome and Systems Biology Degree
Program, National Taiwan University and Academia
Sinica, Taipei 10617,
Taiwan
| | - Bo-Chen Jiang
- Department of Agricultural Chemistry,
National Taiwan University, Taipei
10617, Taiwan
| | - Tsung-Han Wu
- Genome and Systems Biology Degree
Program, National Taiwan University and Academia
Sinica, Taipei 10617,
Taiwan
| | - Chun-Hua Hsu
- Genome and Systems Biology Degree
Program, National Taiwan University and Academia
Sinica, Taipei 10617,
Taiwan
- Department of Agricultural Chemistry,
National Taiwan University, Taipei
10617, Taiwan
- Institute of Biochemical Sciences,
National Taiwan University, Taipei
10617, Taiwan
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18
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Sicari D, Chatziioannou A, Koutsandreas T, Sitia R, Chevet E. Role of the early secretory pathway in SARS-CoV-2 infection. J Cell Biol 2020; 219:e202006005. [PMID: 32725137 PMCID: PMC7480111 DOI: 10.1083/jcb.202006005] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 12/17/2022] Open
Abstract
Similar to other RNA viruses, SARS-CoV-2 must (1) enter a target/host cell, (2) reprogram it to ensure its replication, (3) exit the host cell, and (4) repeat this cycle for exponential growth. During the exit step, the virus hijacks the sophisticated machineries that host cells employ to correctly fold, assemble, and transport proteins along the exocytic pathway. Therefore, secretory pathway-mediated assemblage and excretion of infective particles represent appealing targets to reduce the efficacy of virus biogenesis, if not to block it completely. Here, we analyze and discuss the contribution of the molecular machines operating in the early secretory pathway in the biogenesis of SARS-CoV-2 and their relevance for potential antiviral targeting. The fact that these molecular machines are conserved throughout evolution, together with the redundancy and tissue specificity of their components, provides opportunities in the search for unique proteins essential for SARS-CoV-2 biology that could also be targeted with therapeutic objectives. Finally, we provide an overview of recent evidence implicating proteins of the early secretory pathway as potential antiviral targets with effective therapeutic applications.
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Affiliation(s)
- Daria Sicari
- Inserm U1242, Université de Rennes, Rennes, France
- Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Aristotelis Chatziioannou
- e-NIOS Applications PC, Kallithea-Athens, Greece
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Theodoros Koutsandreas
- e-NIOS Applications PC, Kallithea-Athens, Greece
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | | | - Eric Chevet
- Inserm U1242, Université de Rennes, Rennes, France
- Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
- Università Vita-Salute San Raffaele, Milan, Italy
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19
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Ballegeer M, Saelens X. Cell-Mediated Responses to Human Metapneumovirus Infection. Viruses 2020; 12:v12050542. [PMID: 32423043 PMCID: PMC7290942 DOI: 10.3390/v12050542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/09/2020] [Accepted: 05/12/2020] [Indexed: 12/29/2022] Open
Abstract
Viruses are the most common cause of acute respiratory tract infections (ARTI). Human metapneumovirus (hMPV) frequently causes viral pneumonia which can become life-threatening if the virus spreads to the lungs. Even though hMPV was only isolated in 2001, this negative-stranded RNA virus has probably been circulating in the human population for many decades. Interestingly, almost all adults have serologic evidence of hMPV infection. A well-established host immune response is evoked when hMPV infection occurs. However, the virus has evolved to circumvent and even exploit the host immune response. Further, infection with hMPV induces a weak memory response, and re-infections during life are common. In this review, we provide a comprehensive overview of the different cell types involved in the immune response in order to better understand the immunopathology induced by hMPV. Such knowledge may contribute to the development of vaccines and therapeutics directed against hMPV.
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Affiliation(s)
- Marlies Ballegeer
- VIB-UGent Center for Medical Biotechnology, VIB, B-9052 Ghent, Belgium;
- Department of Biochemistry and Microbiology, Ghent University, B-9000 Ghent, Belgium
| | - Xavier Saelens
- VIB-UGent Center for Medical Biotechnology, VIB, B-9052 Ghent, Belgium;
- Department of Biochemistry and Microbiology, Ghent University, B-9000 Ghent, Belgium
- Correspondence:
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Cell-Mediated Responses to Human Metapneumovirus Infection. Viruses 2020; 12:542. [PMID: 32423043 PMCID: PMC7290942 DOI: 10.3390/v12050542&set/a 882111696+808152660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
Viruses are the most common cause of acute respiratory tract infections (ARTI). Human metapneumovirus (hMPV) frequently causes viral pneumonia which can become life-threatening if the virus spreads to the lungs. Even though hMPV was only isolated in 2001, this negative-stranded RNA virus has probably been circulating in the human population for many decades. Interestingly, almost all adults have serologic evidence of hMPV infection. A well-established host immune response is evoked when hMPV infection occurs. However, the virus has evolved to circumvent and even exploit the host immune response. Further, infection with hMPV induces a weak memory response, and re-infections during life are common. In this review, we provide a comprehensive overview of the different cell types involved in the immune response in order to better understand the immunopathology induced by hMPV. Such knowledge may contribute to the development of vaccines and therapeutics directed against hMPV.
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Cell-Mediated Responses to Human Metapneumovirus Infection. Viruses 2020. [DOI: 10.3390/v12050542
expr 836379838 + 819716165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
Viruses are the most common cause of acute respiratory tract infections (ARTI). Human metapneumovirus (hMPV) frequently causes viral pneumonia which can become life-threatening if the virus spreads to the lungs. Even though hMPV was only isolated in 2001, this negative-stranded RNA virus has probably been circulating in the human population for many decades. Interestingly, almost all adults have serologic evidence of hMPV infection. A well-established host immune response is evoked when hMPV infection occurs. However, the virus has evolved to circumvent and even exploit the host immune response. Further, infection with hMPV induces a weak memory response, and re-infections during life are common. In this review, we provide a comprehensive overview of the different cell types involved in the immune response in order to better understand the immunopathology induced by hMPV. Such knowledge may contribute to the development of vaccines and therapeutics directed against hMPV.
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Hu M, Bogoyevitch MA, Jans DA. Impact of Respiratory Syncytial Virus Infection on Host Functions: Implications for Antiviral Strategies. Physiol Rev 2020; 100:1527-1594. [PMID: 32216549 DOI: 10.1152/physrev.00030.2019] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Respiratory syncytial virus (RSV) is one of the leading causes of viral respiratory tract infection in infants, the elderly, and the immunocompromised worldwide, causing more deaths each year than influenza. Years of research into RSV since its discovery over 60 yr ago have elucidated detailed mechanisms of the host-pathogen interface. RSV infection elicits widespread transcriptomic and proteomic changes, which both mediate the host innate and adaptive immune responses to infection, and reflect RSV's ability to circumvent the host stress responses, including stress granule formation, endoplasmic reticulum stress, oxidative stress, and programmed cell death. The combination of these events can severely impact on human lungs, resulting in airway remodeling and pathophysiology. The RSV membrane envelope glycoproteins (fusion F and attachment G), matrix (M) and nonstructural (NS) 1 and 2 proteins play key roles in modulating host cell functions to promote the infectious cycle. This review presents a comprehensive overview of how RSV impacts the host response to infection and how detailed knowledge of the mechanisms thereof can inform the development of new approaches to develop RSV vaccines and therapeutics.
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Affiliation(s)
- MengJie Hu
- Department of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, Victoria, Australia; and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria, Australia
| | - Marie A Bogoyevitch
- Department of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, Victoria, Australia; and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria, Australia
| | - David A Jans
- Department of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, Victoria, Australia; and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria, Australia
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Solà-Riera C, García M, Ljunggren HG, Klingström J. Hantavirus inhibits apoptosis by preventing mitochondrial membrane potential loss through up-regulation of the pro-survival factor BCL-2. PLoS Pathog 2020; 16:e1008297. [PMID: 32032391 PMCID: PMC7032725 DOI: 10.1371/journal.ppat.1008297] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 02/20/2020] [Accepted: 12/30/2019] [Indexed: 12/12/2022] Open
Abstract
Hantaviruses, zoonotic RNA viruses belonging to the order Bunyavirales, cause two severe acute diseases in humans, hemorrhagic fever with renal syndrome (HFRS) and hantavirus pulmonary syndrome (HPS). Hantavirus-infected patients show strong cytotoxic lymphocyte responses and hyperinflammation; however, infected cells remain mostly intact. Hantaviruses were recently shown to inhibit apoptosis in infected cells. By inhibiting granzyme B- and TRAIL-mediated apoptosis, hantaviruses specifically and efficiently inhibit cytotoxic lymphocyte-mediated killing of infected cells. Hantaviruses also strongly inhibit apoptosis triggered intrinsically; i.e., initiated through intracellular activation pathways different from those used by cytotoxic lymphocytes. However, insights into the latter mechanisms are currently largely unknown. Here, we dissected the mechanism behind how hantavirus infection, represented by the HFRS-causing Hantaan virus and the HPS-causing Andes virus, results in resistance to staurosporine-induced apoptosis. Less active caspase-8 and caspase-9, and consequently less active caspase-3, was observed in infected compared to uninfected staurosporine-exposed cells. While staurosporine-exposed uninfected cells showed massive release of pro-apoptotic cytochrome C into the cytosol, this was not observed in infected cells. Further, hantaviruses prevented activation of BAX and mitochondrial outer membrane permeabilization (MOMP). In parallel, a significant increase in levels of the pro-survival factor BCL-2 was observed in hantavirus-infected cells. Importantly, direct inhibition of BCL-2 by the inhibitor ABT-737, as well as silencing of BCL-2 by siRNA, resulted in apoptosis in staurosporine-exposed hantavirus-infected cells. Overall, we here provide a tentative mechanism by which hantaviruses protect infected cells from intrinsic apoptosis at the mitochondrial level by inducing an increased expression of the pro-survival factor BCL-2, thereby preventing MOMPs and subsequent activation of caspases. The variety of mechanisms used by hantaviruses to ensure survival of infected cells likely contribute to the persistent infection in natural hosts and may play a role in immunopathogenesis of HFRS and HPS in humans. Hantaviruses cause two severe, often fatal, diseases in humans: hemorrhagic fever with renal syndrome (HFRS) and hantavirus pulmonary syndrome (HPS; also called hantavirus cardiopulmonary syndrome (HCPS)). Two hallmarks of human hantavirus infection are robust immune cell activation and hyperinflammation. Despite these strong immune responses, hantavirus-infected cells do not succumb to cell death in patients. Recent studies have shown that hantaviruses hamper cytotoxic lymphocyte-mediated killing, by inhibiting cytotoxic granule-dependent induction of apoptosis and TRAIL-mediated apoptosis, as well as inhibiting intrinsic apoptosis. However, mechanisms behind hantavirus induced inhibition of intrinsic apoptosis have not been described. Here, we show that hantavirus infection leads to increased production of the anti-apoptotic protein BCL-2, hampering the permeabilization of mitochondria and thereby blocking downstream signaling and activation of caspases. Treatment of infected cells with a BCL-2 inhibitor, as well as silencing of BCL-2 with siRNA, both reverted the anti-apoptotic effect. Taken together, this study reveals new insights into the interactions between hantaviruses and infected cells and demonstrates novel mechanisms by which hantaviruses inhibit apoptosis by hampering the permeabilization of mitochondria.
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Affiliation(s)
- Carles Solà-Riera
- Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
- * E-mail:
| | - Marina García
- Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Hans-Gustaf Ljunggren
- Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Jonas Klingström
- Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
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Tang X, Cui C, Liang Q, Sheng X, Xing J, Zhan W. Apoptosis of hemocytes is associated with the infection process of white spot syndrome virus in Litopenaeus vannamei. FISH & SHELLFISH IMMUNOLOGY 2019; 94:907-915. [PMID: 31604147 DOI: 10.1016/j.fsi.2019.10.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 10/02/2019] [Accepted: 10/07/2019] [Indexed: 06/10/2023]
Abstract
Previous studies have demonstrated that white spot syndrome virus (WSSV) could induce hemocytes apoptosis in shrimps, however the inter-relationship between apoptotic process and the WSSV infection status is still currently underexplored. In the present work, the apoptosis and the viral proliferation in hemocytes of Litopenaeus vannamei were simultaneously investigated post WSSV infection by two-color immunofluorescence flow cytometry and real-time quantitative PCR. The apoptotic hemocytes of WSSV-infected shrimp was significantly increased at 12 h post infection (hpi), whereas underwent a slight decline at 24 hpi subsequently. Since 24 hpi, the apoptotic rate of hemocytes in the WSSV-infected shrimp exhibited a rapid and significant increase, and reached the peak level at 48 hpi with the ratio of 18.1 ± 2.0%. Meanwhile, the percentage of WSSV-infected hemocytes and WSSV copies in hemocytes significantly increased at 24 hpi and maintained at a high level afterwards. With the rapid increase of hemocytes apoptosis, hemocyte density in hemolymph decreased dramatically to less than 20% of the mean value of control. Co-localization assay showed that the apoptotic WSSV-infected hemocytes occupied the dominant proportion of total apoptotic hemocytes, which reached the peak at 48 hpi with 12.6 ± 1.5%. The expression profiles of seven pro-apoptotic genes and two apoptosis-inhibiting genes showed significant differential responses at different stages of WSSV infection, reflecting the interplay between the virus and the host immune response. Our results demonstrated that the apoptotic response of shrimp hemocytes could be significantly influenced by the WSSV infection process, which might provide an insight into deeper relationships between viral infection and apoptosis.
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Affiliation(s)
- Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Chuang Cui
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, China
| | - Qianrong Liang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
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MiR-125b Suppression Inhibits Apoptosis and Negatively Regulates Sema4D in Avian Leukosis Virus-Transformed Cells. Viruses 2019; 11:v11080728. [PMID: 31394878 PMCID: PMC6723722 DOI: 10.3390/v11080728] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/09/2019] [Accepted: 08/02/2019] [Indexed: 12/11/2022] Open
Abstract
Subgroup J avian leukosis virus (ALV-J), an oncogenic retrovirus, causes hemangiomas and myeloid tumors in chickens. We previously showed that miR-125b is down-regulated in ALV-J-induced tumors. This study aimed to investigate the possible role of miR-125b in ALV-J-mediated infection and tumorigenesis. Knockdown of miR-125b expression in HP45 cells reduced, whereas over-expression induced late-stage apoptosis. Bioinformatics analysis and luciferase activity assays indicate that miR-125b targets Semaphorin 4D/CD100 (Sema4D) by binding the 3'-untranslated region of messenger RNA (mRNA). Up-regulation of miR-125b in the DF1 cell line suppressed Sema4D expression, whereas miR-125 down-regulation increased Sema4D expression levels. To uncover the function of Sema4D during ALV-J infection, animal infection experiments and in vitro assays were performed and show that Sema4D mRNA levels were up-regulated in ALV-J-infected tissues and cells. Finally, functional experiments show that miR-125 down-regulation and Sema4D over-expression inhibited apoptosis in HP45 cells. These results suggest that miR-125b and its target Sema4D might play an important role in the aggressive growth of HP45 cells induced by avian leukosis viruses (ALVs). These findings improve our understanding of the underlying mechanism of ALV-J infection and tumorigenesis.
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Queiroz-Castro VLD, da Costa EP, Alves SVP, Machado-Neves M, Guimarães JD, Gomes LL, Domingos SV, Ribeiro CG, Caldas RT, Silva-Júnior A. Bovine herpesvirus 1 can cross the intact zona pellucida of bovine oocytes after artificial infection. PLoS One 2019; 14:e0218963. [PMID: 31318892 PMCID: PMC6638837 DOI: 10.1371/journal.pone.0218963] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 06/12/2019] [Indexed: 12/11/2022] Open
Abstract
Bovine herpesvirus 1 (BHV1) is an important bovine pathogen, responsible for respiratory diseases and reproductive problems. This study investigated the penetration capacity of BHV1 into oocytes after co-incubation for either 1 h or 24 h. Immunofluorescence assays in cumulus-oocyte complexes (COCs) and denuded oocytes (without the presence of cumulus cells) were performed and evaluated using confocal laser scanning microscopy. Blood samples and ovaries from BHV1 seronegative cows were used. The oocytes recovered were divided into two groups. Group I comprised COCs (n = 312) and denuded oocytes (n = 296), which were experimentally infected with BHV1 and incubated for 1 h at 38.5°C and 5% CO2. Group II comprised COCs (n = 425) and denuded oocytes (n = 405), which were co-incubated with BHV1 under the same conditions for 24 h. The negative control of these two groups was respectively subjected to the same protocol, except for exposure to BHV1. To our knowledge, this study provides the first evidence of BHV1 detection within COCs and denuded oocytes exhibiting intact zona pellucida when co-incubated with the virus for 24 h. Immunolocalization also confirmed the presence of BHV1 in the cytoplasm of the cumulus cells of all COCs exposed to the virus after both incubation periods. In conclusion, detection of BHV1 inside oocytes has a great meaning for the field of animal reproduction. The detection of BHV1 in different layers of cumulus cells also demonstrates that these cells are sources of viral infection.
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Affiliation(s)
- Vanessa Lopes Dias Queiroz-Castro
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
- * E-mail:
| | - Eduardo Paulino da Costa
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Saullo Vinicius Pereira Alves
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Mariana Machado-Neves
- Department of General Biology, Division of Structural and Cell Biology, Laboratory of Structural Biology, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - José Domingos Guimarães
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Lidiany Lopes Gomes
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Stella Vieira Domingos
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Caroline Gomides Ribeiro
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Rebeca Toledo Caldas
- Department of Veterinary, Division of Animal Reproduction, Laboratory of Oocyte Maturation and “In Vitro” Fertilization, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
| | - Abelardo Silva-Júnior
- Department of Veterinary, Division of Preventive Medicine and Public Health, Laboratory of Animal Virology, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil
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27
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Orthohantaviruses belonging to three phylogroups all inhibit apoptosis in infected target cells. Sci Rep 2019; 9:834. [PMID: 30696898 PMCID: PMC6351540 DOI: 10.1038/s41598-018-37446-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 12/03/2018] [Indexed: 12/04/2022] Open
Abstract
Orthohantaviruses, previously known as hantaviruses, are zoonotic viruses that can cause hantavirus pulmonary syndrome (HPS) and hemorrhagic fever with renal syndrome (HFRS) in humans. The HPS-causing Andes virus (ANDV) and the HFRS-causing Hantaan virus (HTNV) have anti-apoptotic effects. To investigate if this represents a general feature of orthohantaviruses, we analysed the capacity of six different orthohantaviruses – belonging to three distinct phylogroups and representing both pathogenic and non-pathogenic viruses – to inhibit apoptosis in infected cells. Primary human endothelial cells were infected with ANDV, HTNV, the HFRS-causing Puumala virus (PUUV) and Seoul virus, as well as the putative non-pathogenic Prospect Hill virus and Tula virus. Infected cells were then exposed to the apoptosis-inducing chemical staurosporine or to activated human NK cells exhibiting a high cytotoxic potential. Strikingly, all orthohantaviruses inhibited apoptosis in both settings. Moreover, we show that the nucleocapsid (N) protein from all examined orthohantaviruses are potential targets for caspase-3 and granzyme B. Recombinant N protein from ANDV, PUUV and the HFRS-causing Dobrava virus strongly inhibited granzyme B activity and also, to certain extent, caspase-3 activity. Taken together, this study demonstrates that six different orthohantaviruses inhibit apoptosis, suggesting this to be a general feature of orthohantaviruses likely serving as a mechanism of viral immune evasion.
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Boulet C, Doerig CD, Carvalho TG. Manipulating Eryptosis of Human Red Blood Cells: A Novel Antimalarial Strategy? Front Cell Infect Microbiol 2018; 8:419. [PMID: 30560094 PMCID: PMC6284368 DOI: 10.3389/fcimb.2018.00419] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/14/2018] [Indexed: 12/13/2022] Open
Abstract
Malaria is a major global health burden, affecting over 200 million people worldwide. Resistance against all currently available antimalarial drugs is a growing threat, and represents a major and long-standing obstacle to malaria eradication. Like many intracellular pathogens, Plasmodium parasites manipulate host cell signaling pathways, in particular programmed cell death pathways. Interference with apoptotic pathways by malaria parasites is documented in the mosquito and human liver stages of infection, but little is known about this phenomenon in the erythrocytic stages. Although mature erythrocytes have lost all organelles, they display a form of programmed cell death termed eryptosis. Numerous features of eryptosis resemble those of nucleated cell apoptosis, including surface exposure of phosphatidylserine, cell shrinkage and membrane ruffling. Upon invasion, Plasmodium parasites induce significant stress to the host erythrocyte, while delaying the onset of eryptosis. Many eryptotic inducers appear to have a beneficial effect on the course of malaria infection in murine models, but major gaps remain in our understanding of the underlying molecular mechanisms. All currently available antimalarial drugs have parasite-encoded targets, which facilitates the emergence of resistance through selection of mutations that prevent drug-target binding. Identifying host cell factors that play a key role in parasite survival will provide new perspectives for host-directed anti-malarial chemotherapy. This review focuses on the interrelationship between Plasmodium falciparum and the eryptosis of its host erythrocyte. We summarize the current knowledge in this area, highlight the different schools of thoughts and existing gaps in knowledge, and discuss future perspectives for host-directed therapies in the context of antimalarial drug discovery.
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Affiliation(s)
- Coralie Boulet
- Molecular Parasitology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Christian D Doerig
- Infection and Immunity Program, Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, VIC, Australia
| | - Teresa G Carvalho
- Molecular Parasitology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
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Encephalitozoon cuniculi and Vittaforma corneae (Phylum Microsporidia) inhibit staurosporine-induced apoptosis in human THP-1 macrophages in vitro. Parasitology 2018; 146:569-579. [PMID: 30486909 DOI: 10.1017/s0031182018001968] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Obligately intracellular microsporidia regulate their host cell life cycles, including apoptosis, but this has not been evaluated in phagocytic host cells such as macrophages that can facilitate infection but also can be activated to kill microsporidia. We examined two biologically dissimilar human-infecting microsporidia species, Encephalitozoon cuniculi and Vittaforma corneae, for their effects on staurosporine-induced apoptosis in the human macrophage-differentiated cell line, THP1. Apoptosis was measured after exposure of THP-1 cells to live and dead mature organisms via direct fluorometric measurement of Caspase 3, colorimetric and fluorometric TUNEL assays, and mRNA gene expression profiles using Apoptosis RT2 Profiler PCR Array. Both species of microsporidia modulated the intrinsic apoptosis pathway. In particular, live E. cuniculi spores inhibited staurosporine-induced apoptosis as well as suppressed pro-apoptosis genes and upregulated anti-apoptosis genes more broadly than V. corneae. Exposure to dead spores induced an opposite effect. Vittaforma corneae, however, also induced inflammasome activation via Caspases 1 and 4. Of the 84 apoptosis-related genes assayed, 42 (i.e. 23 pro-apoptosis, nine anti-apoptosis, and 10 regulatory) genes were more affected including those encoding members of the Bcl2 family, caspases and their regulators, and members of the tumour necrosis factor (TNF)/TNF receptor R superfamily.
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ITGB1b-Deficient Rare Minnows Delay Grass Carp Reovirus (GCRV) Entry and Attenuate GCRV-Triggered Apoptosis. Int J Mol Sci 2018; 19:ijms19103175. [PMID: 30326628 PMCID: PMC6214113 DOI: 10.3390/ijms19103175] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/08/2018] [Accepted: 10/14/2018] [Indexed: 02/07/2023] Open
Abstract
Integrin β-1 (ITGB1) is a transmembrane protein belonging to the integrin family and it plays an important role in viral entry. In this study, the itgb1b gene of the rare minnow, Gobiocypris rarus, was cloned and analyzed. To investigate the possible role of itgb1b on grass carp reovirus (GCRV) infection, we generated an ITGB1b-deficient rare minnow (ITGB1b-/-) using the CRISPR/Cas9 system. Following stimulation with GCRV, the survival time of the -ITGB1b-/- rare minnows was extended in comparison to the wild-type minnows. Moreover, the relative copy number of GCRV and the level of clathrin-mediated endocytosis-associated and apoptosis-related gene expression in the ITGB1b-/- rare minnows was significantly lower than that of the wild-type minnows. These results suggested that the absence of itgb1b reduced viral entry efficiency and the expression of apoptosis-related genes. Moreover, the data suggested that itgb1b played an important role in mediating the entry of viruses into the cells via clathrin. Therefore, these findings provide novel insight into the function of itgb1b in the process of GCRV infection.
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Marsico S, Caccuri F, Mazzuca P, Apostoli P, Roversi S, Lorenzin G, Zani A, Fiorentini S, Giagulli C, Caruso A. Human lung epithelial cells support human metapneumovirus persistence by overcoming apoptosis. Pathog Dis 2018; 76:4923026. [PMID: 29617859 DOI: 10.1093/femspd/fty013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/05/2018] [Indexed: 11/12/2022] Open
Abstract
Human metapneumovirus (hMPV) has been identified as a major cause of lower respiratory tract infection in children. Epidemiological and molecular evidence has highlighted an association between severe childhood respiratory viral infection and chronic lung diseases, such as asthma and chronic obstructive pulmonary disease. Currently, animal models have demonstrated the ability of hMPV to persist in vivo suggesting a role of the virus in asthma development in children. However, mechanisms involved in hMPV persistence in the respiratory tract are not yet understood. In the present study we monitored hMPV infection in human alveolar epithelial A549 cells in order to understand if the virus is able to persist in these cells upon acute infection. Our data show that hMPV initially induces an apoptotic process in A549 cells through poly (ADP-ribose) polymerase 1 cleavage, caspase-3/7 activation and Wee1 activity. The hMPV-infected cells were then able to overcome the apoptotic pathway and cell cycle arrest in G2/M by expressing B-cell lymphoma 2 and to acquire a reservoir cell phenotype with constant production of infectious virus. These findings provide evidence of the ability of hMPV to persist in alveolar epithelial cells and help in understanding the mechanisms responsible for hMPV persistence in the human respiratory tract.
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Affiliation(s)
- Stefania Marsico
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Cosenza, Italy
| | - Francesca Caccuri
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Pietro Mazzuca
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Paola Apostoli
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Sara Roversi
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Giovanni Lorenzin
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Alberto Zani
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Simona Fiorentini
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Cinzia Giagulli
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Arnaldo Caruso
- Section of Microbiology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
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32
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Lu NT, Liu NM, Patel D, Vu JQ, Liu L, Kim CY, Cho P, Khachatoorian R, Patel N, Magyar CE, Ganapathy E, Arumugaswami V, Dasgupta A, French SW. Oncoprotein Stathmin Modulates Sensitivity to Apoptosis in Hepatocellular Carcinoma Cells During Hepatitis C Viral Replication. J Cell Death 2018; 11:1179066018785141. [PMID: 30034249 PMCID: PMC6047100 DOI: 10.1177/1179066018785141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/28/2018] [Indexed: 01/28/2023] Open
Abstract
Patients with chronic hepatitis C virus (HCV) infection risk complications of
cirrhosis, liver failure, and hepatocellular carcinoma (HCC). Previously, our
proteomic examination of hepatocytes carrying a HCV-replicon revealed that
deregulation of cytoskeletal dynamics may be a potential mechanism of
viral-induced HCC growth. Here, we demonstrate the effect of HCV replication on
the microtubule regulator stathmin (STMN1) in HCC cells. We further explore how
the altered activity or synthesis of stathmin affects cellular proliferation and
sensitivity to apoptosis in control HCC cells (Huh7.5) and experimental
HCV-replicon harboring HCC cells (R-Huh7.5). The HCV-replicon harboring HCC
cells (R-Huh 7.5) lack viral structural genes/proteins for acute infectivity and
thus is the standard model for in vitro chronic infection study. Knockdown of
endogenous stathmin reduced sensitivity to apoptosis in replicon cells.
Meanwhile, constitutively active stathmin increased sensitivity to apoptosis in
replicon cells. In addition, overexpression of constitutively active stathmin
reduced cell proliferation in both control and replicon cells. These findings
implicate, for the first time, a novel role for stathmin in viral
replication–related apoptosis. Stathmin’s potential role in HCV replication and
HCC make it a candidate for the future study of viral-induced malignancies.
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Affiliation(s)
- Nu T Lu
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA.,Department of Hematology and Oncology, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Natalie M Liu
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Darshil Patel
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - James Q Vu
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Lisa Liu
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Chae Yeon Kim
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Peter Cho
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Ronik Khachatoorian
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Nikita Patel
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Clara E Magyar
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Ekambaram Ganapathy
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Vaithilingaraja Arumugaswami
- Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA.,Department of Surgery and Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Asim Dasgupta
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Samuel Wheeler French
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA.,UCLA Jonsson Comprehensive Cancer Center, Los Angeles, CA, USA
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Hsu CC, Meeker SM, Escobar S, Brabb TL, Paik J, Park H, Iritani BM, Maggio-Price L. Murine norovirus inhibits B cell development in the bone marrow of STAT1-deficient mice. Virology 2017; 515:123-133. [PMID: 29287229 PMCID: PMC5801037 DOI: 10.1016/j.virol.2017.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/12/2017] [Accepted: 12/13/2017] [Indexed: 12/13/2022]
Abstract
Noroviruses are a leading cause of gastroenteritis in humans and it was recently revealed that noroviruses can infect B cells. We demonstrate that murine norovirus (MNV) infection can significantly impair B cell development in the bone marrow in a signal transducer and activator of transcription 1 (STAT1) dependent, but interferon signaling independent manner. We also show that MNV replication is more pronounced in the absence of STAT1 in ex vivo cultured B cells. Interestingly, using bone marrow transplantation studies, we found that impaired B cell development requires Stat1-/- hematopoietic cells and Stat1-/- stromal cells, and that the presence of wild-type hematopoietic or stromal cells was sufficient to restore normal development of Stat1-/- B cells. These results suggest that B cells normally restrain norovirus replication in a cell autonomous manner, and that wild-type STAT1 is required to protect B cell development during infection.
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Affiliation(s)
- Charlie C Hsu
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Stacey M Meeker
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Sabine Escobar
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Thea L Brabb
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Jisun Paik
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Heon Park
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Brian M Iritani
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Lillian Maggio-Price
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
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Díaz S, Rojas ME, Galleguillos M, Maturana C, Smith PI, Cifuentes F, Contreras I, Smith PA. Apoptosis inhibition of Atlantic salmon (Salmo salar) peritoneal macrophages by Piscirickettsia salmonis. JOURNAL OF FISH DISEASES 2017; 40:1895-1902. [PMID: 28699666 DOI: 10.1111/jfd.12660] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 04/27/2017] [Accepted: 04/30/2017] [Indexed: 06/07/2023]
Abstract
To improve the understanding of the piscirickettsiosis pathogenesis, the in vivo apoptosis modulation of peritoneal macrophages and lymphocytes was studied in juvenile Salmo salar intraperitoneally injected with Piscirickettsia salmonis. Five fish were sampled at post-exposure days 1, 5, 8 (preclinical), 20 (clinical) and 40 (post-clinical period of the disease), and the leucocytes of their coelomic washings were analysed by flow cytometry (using the JC-1 cationic dye), TUNEL and cytology to detect apoptotic cells. A selective and temporal pattern of apoptosis modulation by P. salmonis infection was observed. Apoptosis in lymphocytes was not affected, whereas it was inhibited in macrophages but only during the preclinical stage of the induced piscirickettsiosis. Hence, it is postulated that P. salmonis inhibits macrophage apoptosis at the beginning of the disease development to survive, multiply and probably be transported inside these phagocytes; once this process is complete, macrophage apoptosis is no longer inhibited, thus facilitating the exit of the bacteria from the infected cells for continuing their life cycle.
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Affiliation(s)
- S Díaz
- Facultad de Ciencias Veterinarias, Universidad de Chile, Santiago, Chile
| | - M E Rojas
- Facultad de Ciencias Veterinarias, Universidad de Chile, Santiago, Chile
| | - M Galleguillos
- Facultad de Ciencias Veterinarias, Universidad de Chile, Santiago, Chile
| | | | - P I Smith
- Universidad del Desarrollo, Santiago, Chile
| | - F Cifuentes
- Facultad de Ciencias Veterinarias, Universidad de Chile, Santiago, Chile
| | | | - P A Smith
- Facultad de Ciencias Veterinarias, Universidad de Chile, Santiago, Chile
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Li Y, Wu Z, Liu K, Qi P, Xu J, Wei J, Li B, Shao D, Shi Y, Qiu Y, Ma Z. Proteomic Analysis of the Secretome of Porcine Alveolar Macrophages Infected with Porcine Reproductive and Respiratory Syndrome Virus. Proteomics 2017; 17. [DOI: 10.1002/pmic.201700080] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 07/31/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Yuming Li
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Zhuanchang Wu
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Ke Liu
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Pengfei Qi
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Jinpeng Xu
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Jianchao Wei
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Beibei Li
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Donghua Shao
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Yuanyuan Shi
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Yafeng Qiu
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
| | - Zhiyong Ma
- Shanghai Veterinary Research Institute; Chinese Academy of Agricultural Science; Shanghai PR China
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MiRNA-124 is a link between measles virus persistent infection and cell division of human neuroblastoma cells. PLoS One 2017; 12:e0187077. [PMID: 29073265 PMCID: PMC5658143 DOI: 10.1371/journal.pone.0187077] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/12/2017] [Indexed: 01/12/2023] Open
Abstract
Measles virus (MV) infects a variety of lymphoid and non-lymphoid peripheral organs. However, in rare cases, the virus can persistently infect cells within the central nervous system. Although some of the factors that allow MV to persist are known, the contribution of host cell-encoded microRNAs (miRNA) have not been described. MiRNAs are a class of noncoding RNAs transcribed from genomes of all multicellular organisms and some viruses, which regulate gene expression in a sequence-specific manner. We have studied the contribution of host cell-encoded miRNAs to the establishment of MV persistent infection in human neuroblastoma cells. Persistent MV infection was accompanied by differences in the expression profile and levels of several host cell-encoded microRNAs as compared to uninfected cells. MV persistence infection of a human neuroblastoma cell line (UKF-NB-MV), exhibit high miRNA-124 expression, and reduced expression of cyclin dependent kinase 6 (CDK6), a known target of miRNA-124, resulting in slower cell division but not cell death. By contrast, acute MV infection of UKF-NB cells did not result in increased miRNA-124 levels or CDK6 reduction. Ectopic overexpression of miRNA-124 affected cell viability only in UKF-NB-MV cells, causing cell death; implying that miRNA-124 over expression can sensitize cells to death only in the presence of MV persistent infection. To determine if miRNA-124 directly contributes to the establishment of MV persistence, UKF-NB cells overexpressing miRNA-124 were acutely infected, resulting in establishment of persistently infected colonies. We propose that miRNA-124 triggers a CDK6-dependent decrease in cell proliferation, which facilitates the establishment of MV persistence in neuroblastoma cells. To our knowledge, this is the first report to describe the role of a specific miRNA in MV persistence.
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Han X, Tian Y, Guan R, Gao W, Yang X, Zhou L, Wang H. Infectious Bronchitis Virus Infection Induces Apoptosis during Replication in Chicken Macrophage HD11 Cells. Viruses 2017; 9:v9080198. [PMID: 28933760 PMCID: PMC5580455 DOI: 10.3390/v9080198] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 07/16/2017] [Accepted: 07/21/2017] [Indexed: 01/21/2023] Open
Abstract
Avian infectious bronchitis has caused huge economic losses in the poultry industry. Previous studies have reported that infectious bronchitis virus (IBV) infection can produce cytopathic effects (CPE) and apoptosis in some mammalian cells and primary cells. However, there is little research on IBV-induced immune cell apoptosis. In this study, chicken macrophage HD11 cells were established as a cellular model that is permissive to IBV infection. Then, IBV-induced apoptosis was observed through a cell viability assay, morphological changes, and flow cytometry. The activity of caspases, the inhibitory efficacy of caspase-inhibitors and the expression of apoptotic genes further suggested the activation of apoptosis through both intrinsic and extrinsic pathways in IBV-infected HD11 cells. Additionally, ammonium chloride (NH₄Cl) pretreated HD11 cells blocked IBV from entering cells and inhibited IBV-induced apoptosis. UV-inactivated IBV also lost the ability of apoptosis induction. IBV replication was increased by blocking caspase activation. This study presents a chicken macrophage cell line that will enable further analysis of IBV infection and offers novel insights into the mechanisms of IBV-induced apoptosis in immune cells.
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Affiliation(s)
- Xiaoxiao Han
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
| | - Yiming Tian
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
| | - Ru Guan
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
| | - Wenqian Gao
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
| | - Xin Yang
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
| | - Long Zhou
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
| | - Hongning Wang
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610064, China.
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China.
- "985 Project" Science Innovative Platform for Resource and Environment Protection of Southwestern China, Sichuan University, Chengdu 610064, China.
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Kim MS, Choi SH, Kim KH. Over-passage of epithelioma papulosum cyprini (EPC) cells increased viral hemorrhagic septicemia virus (VHSV) replication. FISH & SHELLFISH IMMUNOLOGY 2016; 58:318-322. [PMID: 27663852 DOI: 10.1016/j.fsi.2016.09.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 08/23/2016] [Accepted: 09/20/2016] [Indexed: 06/06/2023]
Abstract
Vaccines based on inactivated or attenuated viruses can be a way to prevent viral hemorrhagic septicemia virus (VHSV) disease, and the efficiency of viral production is a critical factor that can determine the practical use of developed vaccines in aquaculture farms. To know the effects of epithelioma papulosum cyprini (EPC) cells over-subculture on VHSV replication, the VHSV titer produced from high-passage EPC cells (subcultured more than 200 times in our laboratory) was compared to the titer produced from low-passage EPC cells (subcultured 5-15 times). Furthermore, to know whether immune factors are involved in VHSV titers, differences not only in the expression of Mx1 and ISG15 genes but also in the apoptosis progression by VHSV infection between high- and low-passage EPC cells were analyzed. The VHSV titers from high-passage EPC cells were significantly higher than titers from low-passage EPC cells, suggesting that the changed properties of EPC cells by over-subculture were favorable for VHSV proliferation. The DNA laddering of high-passage EPC cells by VHSV infection took a longer time than that of low-passage EPC cells, suggesting that over-subculture might delay apoptosis in VHSV infected EPC cells, and the delay of apoptosis by over-subculture can be thought as one of the factors that increased VHSV titers in high-passage EPC cells. The increased folds of Mx1 and ISG15 genes in high-passage EPC cells were significantly lower than those in low-passage EPC cells when exposed to either poly (I:C) or VHSV. However, the expression levels of Mx1 and ISG15 genes of high-passage EPC cells that were not stimulated with poly I:C or VHSV were almost equal to or higher than the expression levels of low-passage EPC cells that were exposed to poly (I:C) or VHSV. This result suggests that high-passage EPC cells were already in an excited state in type I interferon responses without any stimulants. The full open reading frame (ORF) sequences of Mx1 gene between high- and low-passage EPC cells were completely same. However, there were some differences in the amino acids sequences of ISG15 gene between high- and low-passage EPC cells, suggesting that ISG15-mediated pathways might be different between high- and low-passage EPC cells, which might influence on the replication of VHSV. The present results showed that the changed properties of EPC cells by over-subculture were favorable for VHSV proliferation.
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Affiliation(s)
- Min Sun Kim
- Department of Bioscience and Biotechnology, Sejong University, Seoul, 05006, Republic of Korea
| | - Seung Hyuk Choi
- Department of Aquatic Life Medicine, Pukyong National University, Busan, 48513, Republic of Korea
| | - Ki Hong Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan, 48513, Republic of Korea.
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Abstract
Apoptosis is a physiological program of cell suicide conserved in invertebrates and vertebrates. Apoptosis is crucial to the normal development of organisms and in tissue homeostasis by promoting elimination of unwanted cells, including damaged or virus-infected cells. Due to the importance of programmed cell death for the survival of the organism, a tight regulation is exerted at various activation levels of the cell-death machinery. The utilization of the baculovirus Autographa californica multiple nucleopolyhedrovirus (AcMNPV) to identify genes that inhibit the apoptotic process will be described using a transfection-based approach, illustrated by identification of the p49 gene.
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Affiliation(s)
- Nor Chejanovsky
- Entomology Department, Institute of Plant Protection, The Volcani Center, POB 6, Bet Dagan, 50250, Israel.
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40
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Kelly AG, Netzler NE, White PA. Ancient recombination events and the origins of hepatitis E virus. BMC Evol Biol 2016; 16:210. [PMID: 27733122 PMCID: PMC5062859 DOI: 10.1186/s12862-016-0785-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 09/30/2016] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Hepatitis E virus (HEV) is an enteric, single-stranded, positive sense RNA virus and a significant etiological agent of hepatitis, causing sporadic infections and outbreaks globally. Tracing the evolutionary ancestry of HEV has proved difficult since its identification in 1992, it has been reclassified several times, and confusion remains surrounding its origins and ancestry. RESULTS To reveal close protein relatives of the Hepeviridae family, similarity searching of the GenBank database was carried out using a complete Orthohepevirus A, HEV genotype I (GI) ORF1 protein sequence and individual proteins. The closest non-Hepeviridae homologues to the HEV ORF1 encoded polyprotein were found to be those from the lepidopteran-infecting Alphatetraviridae family members. A consistent relationship to this was found using a phylogenetic approach; the Hepeviridae RdRp clustered with those of the Alphatetraviridae and Benyviridae families. This puts the Hepeviridae ORF1 region within the "Alpha-like" super-group of viruses. In marked contrast, the HEV GI capsid was found to be most closely related to the chicken astrovirus capsid, with phylogenetic trees clustering the Hepeviridae capsid together with those from the Astroviridae family, and surprisingly within the "Picorna-like" supergroup. These results indicate an ancient recombination event has occurred at the junction of the non-structural and structure encoding regions, which led to the emergence of the entire Hepeviridae family. The Astroviridae capsid is also closely related to the Tymoviridae family of monopartite, T = 3 icosahedral plant viruses, whilst its non-structural region is related to viruses of the Potyviridae; a large family of plant-infecting viruses with a flexible filamentous rod-shaped virion. Thus, we identified a separate inter-viral family recombination event, again at the non-structural/structural junction, which likely led to the creation of the Astroviridae. CONCLUSIONS In summary, we have shown that new viral families have been created though recombination at the junction of the genome that encodes non-structural and structural proteins, and such recombination events are implicated in the genesis of important human pathogens; HEV, astrovirus and rubella virus.
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Affiliation(s)
- Andrew G Kelly
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, NSW, Australia
| | - Natalie E Netzler
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, NSW, Australia
| | - Peter A White
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales, Sydney, NSW, Australia.
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Abstract
Cell death is a common outcome of virus infection. In some cases, cell death curbs virus replication. In others, cell death enhances virus dissemination and contributes to tissue injury, exacerbating viral disease. Three forms of cell death are observed following virus infection-apoptosis, necroptosis, and pyroptosis. In this review, I describe the core machinery needed for each of these forms of cell death. Using representative viruses, I highlight how distinct stages of virus replication initiate signaling pathways that elicit these forms of cell death. I also discuss viral strategies to overcome the deleterious effects of cell death on virus propagation and the consequences of cell death for host physiology.
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Affiliation(s)
- Pranav Danthi
- Department of Biology, Indiana University, Bloomington, Indiana 47405;
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42
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Cardoso TC, Rosa ACG, Ferreira HL, Okamura LH, Oliveira BRSM, Vieira FV, Silva-Frade C, Gameiro R, Flores EF. Bovine herpesviruses induce different cell death forms in neuronal and glial-derived tumor cell cultures. J Neurovirol 2016; 22:725-735. [PMID: 27311457 DOI: 10.1007/s13365-016-0444-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 03/29/2016] [Accepted: 04/04/2016] [Indexed: 12/14/2022]
Abstract
Oncolytic viruses have the ability to infect tumor cells and leave healthy cells intact. In this study, bovine herpesvirus 1 (BHV1; Los Angeles, Cooper, and SV56/90 strains) and bovine herpesvirus 5 (BHV5; SV507/99 and GU9457818 strains) were used to infect two neuronal tumor cell lineages: neuro2a (mouse neuroblastoma cells) and C6 (rat glial cells). BHV1 and BHV5 strains infected both cell lines and positively correlated with viral antigen detection (p < 0.005). When neuro2a cells were infected by Los Angeles, SV507/99, and GU9457818 strains, 40 % of infected cells were under early apoptosis and necroptosis pathways. Infected C6 cells were >40 % in necroptosis phase when infected by BHV5 (GU9457818 strain). Blocking caspase activation did not interfere with cell death. However, when necroptosis was blocked, 60-80 % of both infected cells with either virus switched to early apoptosis pathway with no interference with virus replication. Moreover, reactive oxygen species production and mitochondrial membrane dysfunction were detected at high levels in both infected cell lines. In spite of apoptosis and necroptosis blockage, tumor necrosis factor alpha (TNFA) and virus transcription were positively correlated for all viral strains studied. Thus, these results contribute to the characterization of BHV1 and BHV5 as potential oncolytic viruses for non-human cells. Nonetheless, the mechanisms underlying their oncolytic activity in human cells are still to be determined.
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Affiliation(s)
- Tereza C Cardoso
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil.
| | - Ana Carolina G Rosa
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Helena L Ferreira
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
- FZEA-USP, Departamento de Medicina Veterinária, Av. Duque de Caxias Norte, 225, Pirassununga, SP, CEP 13635-900, Brazil
| | - Lucas H Okamura
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Bruna R S M Oliveira
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Flavia V Vieira
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Camila Silva-Frade
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Roberto Gameiro
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Eduardo F Flores
- Virology Section, Federal University of Santa Maria, Santa Maria, 97115-900, RS, Brazil
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Kim MS, Lee JA, Kim KH. Effects of a broad-spectrum caspase inhibitor, Z-VAD(OMe)-FMK, on viral hemorrhagic septicemia virus (VHSV) infection-mediated apoptosis and viral replication. FISH & SHELLFISH IMMUNOLOGY 2016; 51:41-45. [PMID: 26899629 DOI: 10.1016/j.fsi.2016.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 12/30/2015] [Accepted: 02/16/2016] [Indexed: 06/05/2023]
Abstract
In the development of inactivated or attenuated viral vaccines for cultured fish, viral titers harvested from the cultured cells would be the most important factor for the determination of vaccine's cost effectiveness. In this study, we hypothesized that the lengthening of cell survival time by the inhibition of apoptosis can lead to an increase of the final titer of viral hemorrhagic septicemia virus (VHSV). To test the hypothesis, we investigated the effects of a broad-spectrum caspase inhibitor, Z-VAD(OMe)-FMK, on VHSV infection-mediated apoptosis in Epithelioma papulosum cyprini (EPC) cells and on the VHSV titers. VHSV infection induced the DNA laddering in EPC cells, and the progression of DNA fragmentation was in proportion to the CPE extension. The progression of DNA fragmentation in EPC cells infected with VHSV was clearly inhibited by exposure to Z-VAD(OMe)-FMK, and the inhibition was intensified according to the increase of the inhibitor concentration. These results confirmed the previous reports that the death of host cells by VHSV infection is through apoptosis. Cells infected with a recombinant VHSV, rVHSV-ΔNV-eGFP, that was generated from our previous study by replacement of the NV gene ORF with the enhanced green fluorescent protein (eGFP) gene ORF, showed earlier and more distinct DNA fragmentations compared to the cells infected with wild-type VHSV, suggesting the inhibitory role of the NV protein in VHSV-mediated apoptosis that was previously reported. The final viral titers in the supernatant isolated from Z-VAD(OMe)-FMK treated cells after showing an extensive CPE were significantly higher than the viral titers from cells infected with virus alone, indicating that the delay of apoptosis by Z-VAD(OMe)-FMK extended the survival time of EPC cells, which lengthen the time for VHSV replication in the cells. In conclusion, Z-VAD(OMe)-FMK-mediated inhibition of apoptosis significantly increased the final titers of both wild-type VHSV and rVHSV-ΔNV-eGFP, indicating that apoptosis inhibition can be a way to get higher titers of VHSV.
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Affiliation(s)
- Min Sun Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, South Korea
| | - Ji Ae Lee
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, South Korea
| | - Ki Hong Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan 608-737, South Korea.
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Clem RJ. Arboviruses and apoptosis: the role of cell death in determining vector competence. J Gen Virol 2016; 97:1033-1036. [PMID: 26872460 DOI: 10.1099/jgv.0.000429] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A relatively small number of mosquito species transmit arboviruses such as dengue, yellow fever, chikungunya and West Nile viruses to hundreds of millions of people each year, yet we still lack a thorough understanding of the molecular factors that determine vector competence. Apoptosis has been shown to be an important factor in determining the outcome of virus infection for many viruses. However, until recently, it was not clear whether apoptosis plays a role in determining the outcome of arbovirus infections in mosquitoes. Recent work has begun to shed light on the roles of apoptosis in this important process.
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Affiliation(s)
- Rollie J Clem
- Division of Biology, Kansas State University, Manhattan, KS 66506, USA
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45
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Wolff S, Groseth A, Meyer B, Jackson D, Strecker T, Kaufmann A, Becker S. The New World arenavirus Tacaribe virus induces caspase-dependent apoptosis in infected cells. J Gen Virol 2016; 97:855-866. [PMID: 26769540 DOI: 10.1099/jgv.0.000403] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The Arenaviridae is a diverse and growing family of viruses that already includes more than 25 distinct species. While some of these viruses have a significant impact on public health, others appear to be non-pathogenic. At present little is known about the host cell responses to infection with different arenaviruses, particularly those found in the New World; however, apoptosis is known to play an important role in controlling infection of many viruses. Here we show that infection with Tacaribe virus (TCRV), which is widely considered the prototype for non-pathogenic arenaviruses, leads to stronger induction of apoptosis than does infection with its human-pathogenic relative Junín virus. TCRV-induced apoptosis occurred in several cell types during late stages of infection and was shown to be caspase-dependent, involving the activation of caspases 3, 7, 8 and 9. Further, UV-inactivated TCRV did not induce apoptosis, indicating that the activation of this process is dependent on active viral replication/transcription. Interestingly, when apoptosis was inhibited, growth of TCRV was not enhanced, indicating that apoptosis does not have a direct negative effect on TCRV infection in vitro. Taken together, our data identify and characterize an important virus-host cell interaction of the prototypic, non-pathogenic arenavirus TCRV, which provides important insight into the growing field of arenavirus research aimed at better understanding the diversity in responses to different arenavirus infections and their functional consequences.
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Affiliation(s)
- Svenja Wolff
- Institut für Virologie, Philipps-Universität Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany.,German Center for Infection Research (DZIF), partner site Gießen-Marburg-Langen, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Allison Groseth
- Institut für Virologie, Philipps-Universität Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Bjoern Meyer
- University of St Andrews, Biomedical Sciences Research Complex, North Haugh, St Andrews, Fife, KY16 9ST, UK
| | - David Jackson
- University of St Andrews, Biomedical Sciences Research Complex, North Haugh, St Andrews, Fife, KY16 9ST, UK
| | - Thomas Strecker
- Institut für Virologie, Philipps-Universität Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Andreas Kaufmann
- Institut für Immunologie, Philipps-Universität Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
| | - Stephan Becker
- German Center for Infection Research (DZIF), partner site Gießen-Marburg-Langen, Hans-Meerwein Str. 2, 35043, Marburg, Germany.,Institut für Virologie, Philipps-Universität Marburg, Hans-Meerwein Str. 2, 35043, Marburg, Germany
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46
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Kim J, Hamid FB, Shin CG. Apoptotic events induced by prototype foamy virus infection. Anim Cells Syst (Seoul) 2016. [DOI: 10.1080/19768354.2015.1137488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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47
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Ferré CA, Davezac N, Thouard A, Peyrin JM, Belenguer P, Miquel MC, Gonzalez-Dunia D, Szelechowski M. Manipulation of the N-terminal sequence of the Borna disease virus X protein improves its mitochondrial targeting and neuroprotective potential. FASEB J 2015; 30:1523-33. [PMID: 26700735 DOI: 10.1096/fj.15-279620] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 12/08/2015] [Indexed: 01/11/2023]
Abstract
To favor their replication, viruses express proteins that target diverse mammalian cellular pathways. Due to the limited size of many viral genomes, such proteins are endowed with multiple functions, which require targeting to different subcellular compartments. One salient example is the X protein of Borna disease virus, which is expressed both at the mitochondria and in the nucleus. Moreover, we recently demonstrated that mitochondrial X protein is neuroprotective. In this study, we sought to examine the mechanisms whereby the X protein transits between subcellular compartments and to define its localization signals, to enhance its mitochondrial accumulation and thus, potentially, its neuroprotective activity. We transfected plasmids expressing fusion proteins bearing different domains of X fused to enhanced green fluorescent protein (eGFP) and compared their subcellular localization to that of eGFP. We observed that the 5-16 domain of X was responsible for both nuclear export and mitochondrial targeting and identified critical residues for mitochondrial localization. We next took advantage of these findings and constructed mutant X proteins that were targeted only to the mitochondria. Such mutants exhibited enhanced neuroprotective properties in compartmented cultures of neurons grown in microfluidic chambers, thereby confirming the parallel between mitochondrial accumulation of the X protein and its neuroprotective potential.-Ferré C. A., Davezac, N., Thouard, A., Peyrin, J. M., Belenguer, P., Miquel, M.-C., Gonzalez-Dunia, D., Szelechowski, M. Manipulation of the N-terminal sequence of the Borna disease virus X protein improves its mitochondrial targeting and neuroprotective potential.
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Affiliation(s)
- Cécile A Ferré
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Noélie Davezac
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Anne Thouard
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Jean-Michel Peyrin
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Pascale Belenguer
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Marie-Christine Miquel
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Daniel Gonzalez-Dunia
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
| | - Marion Szelechowski
- *INSERM, Unité Mixte de Recherche (UMR) 1043, Centre de Physiopathologie de Toulouse Purpan (CPTP), Toulouse, France; Centre National de la Recherche Scientifique (CNRS), UMR 5282, Toulouse, France; Université Toulouse III Paul Sabatier, Toulouse, France; CNRS UMR 5547, Centre de Biologie du Développement, Toulouse, France; CNRS UMR 8256, Biological Adaptation and Aging, Institut de Biologie Paris Seine, Université Pierre et Marie Curie, Paris, France; and Université Pierre et Marie Curie, Sorbonne Universités, Paris, France
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48
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Wei J, Zhang P, Guo M, Xu M, Li P, Chen X, Gao P, Yan Y, Wei S, Qin Q. TTRAP is a critical factor in grouper immune response to virus infection. FISH & SHELLFISH IMMUNOLOGY 2015; 46:274-284. [PMID: 26172204 DOI: 10.1016/j.fsi.2015.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/07/2015] [Accepted: 07/08/2015] [Indexed: 06/04/2023]
Abstract
TTRAP (TRAF and TNF receptor-associated protein) is latest identified cytosolic protein that serves as a negative regulator for TNF signaling pathway. In this study, a member of TNF superfamily, TTRAP gene (designed as EcTTRAP) was cloned from grouper, Epinephelus coioides. There was an Exo_endo_phos type domain in EcTTRAP, and it was well conserved when compared with other TTRAPs, especially the endonuclease activity related motifs. EcTTRAP exhibited prominent endonuclease activity against the genome DNA from Escherichia coli, Vibrio vulnificus and E. coli JM109. Intracellular localization revealed that EcTTRAP expression distributed in both cytoplasm and nucleus. Real-time PCR analysis indicates that EcTTRAP is expressed in all selective grouper tissues, with the higher expression level in muscle, skin and gills. EcTTRAP was identified as a remarkably (P < 0.01) up-regulated protein responding to Singapore grouper iridovirus (SGIV) infection. Overexpression of EcTTRAP inhibited NF-κB activation, meanwhile the C terminal portion of the protein was found to be responsive domain for the inhibition. Stable transfection of FHM cells with EcTTRAP inhibited apoptosis induced by SGIV. Overexpression of EcTTRAP in grouper spleen (GS) cells inhibited the replication of SGIV. The present results provided new evidences for the potential roles of such molecule in E. coioides, and further confirmed the existence of TTRAP modulated TNF signaling pathway in grouper.
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Affiliation(s)
- Jingguang Wei
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Ping Zhang
- Teaching Center of Biology Experiment, School of Life Sciences, Sun Yat-sen University, 135West Xingang Road, Guangzhou 510275, PR China
| | - Minglan Guo
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Meng Xu
- State Key Laboratory Breeding Base for Sustainable Exploitation of Tropical Biotic Resources, College of Marine Science, Hainan University, Haikou 570228, PR China
| | - Pengfei Li
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Xiuli Chen
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Pin Gao
- State Key Laboratory Breeding Base for Sustainable Exploitation of Tropical Biotic Resources, College of Marine Science, Hainan University, Haikou 570228, PR China
| | - Yang Yan
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Shina Wei
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Qiwei Qin
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China.
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49
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Hiller BE, Berger AK, Danthi P. Viral gene expression potentiates reovirus-induced necrosis. Virology 2015; 484:386-394. [PMID: 26226583 PMCID: PMC4567420 DOI: 10.1016/j.virol.2015.06.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 05/14/2015] [Accepted: 06/12/2015] [Indexed: 12/22/2022]
Abstract
Infection of some cell types by reovirus evokes a caspase-independent form of cell death resembling necrosis. While reovirus strain T3D induces necrosis much more efficiently than strain T1L, which viral components contribute to this difference is not known. In this study, we identified that the sialic acid binding property of the reovirus σ1 protein affects necrosis efficiency. We found that in addition to sialic acid engagement by the virus particles, viral gene expression, in the form of viral RNA or protein synthesis, is also required for necrosis induction. Our studies reveal that sialic acid does not directly participate in necrosis induction by initiating a signaling pathway. Instead, sialic acid engagement augments necrosis induction indirectly, by increasing reovirus gene expression in each infected cell. Comparison of our results with previous studies suggests that reovirus-induced apoptosis and necrosis are initiated by distinct stages of viral infection.
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Affiliation(s)
- Bradley E Hiller
- Department of Biology, Indiana University, Bloomington, IN 47405, United States
| | - Angela K Berger
- Interdisciplinary Program in Biochemistry, Indiana University, Bloomington, IN 47405, United States
| | - Pranav Danthi
- Department of Biology, Indiana University, Bloomington, IN 47405, United States; Interdisciplinary Program in Biochemistry, Indiana University, Bloomington, IN 47405, United States..
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50
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Kumar R, Kumar Pate S, Rami Reddy B, Bhatt M, Karthik K, Gandham RK, Singh Mali Y, Dhama K. Apoptosis and Other Alternate Mechanisms of Cell Death. ACTA ACUST UNITED AC 2015. [DOI: 10.3923/ajava.2015.646.668] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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