1
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Zhai B, Ran W, Sun Y, Alcos A, Liu M, Chen J, Richardson CD, Sun D, Zhao J. Human SLAM-adapted canine distemper virus can enter human peripheral blood mononuclear cells and replicate in mice expressing human SLAM and defective for STAT1 expression. Virulence 2025; 16:2457967. [PMID: 39981650 PMCID: PMC11849921 DOI: 10.1080/21505594.2025.2457967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2024] [Revised: 12/24/2024] [Accepted: 01/20/2025] [Indexed: 02/22/2025] Open
Abstract
Canine distemper virus (CDV) is a member of the genus Morbillivirus with a worldwide distribution that causes fatal diseases in canids and marine mammals. In recent years, CDV has demonstrated the remarkable ability of pathogens to cross species barriers. The natural host range of CDV has expanded from Canidae to Primates, presumably attributed to ecological shifts and the emergence of viral variants. Therefore, it is important to investigate whether CDV can infect humans by adapting to the human signalling lymphocyte activation molecule (hSLAM) receptor to cross the species barrier. Through successive passaging and plaque cloning of a CDV wild-type strain (5804PeH) in Vero cells expressing hSLAM (Vero-hSLAM), we obtained an hSLAM adaptive strain, 5804PeH-VhS. The adapted CDV strain exhibited a D540G mutation within the receptor-binding domain (RBD) of the haemagglutinin (H) protein. The HD540G mutation has enhanced cell-cell fusion activity in Vero-hSLAM cells. This adaptation allowed the CDV strain to infect human peripheral blood mononuclear cells (PBMCs), particularly T lymphocytes and inhibited lymphocyte proliferation. Additionally, this strain could replicate in the lymphoid tissues of transgenic mice that express the hSLAM receptor, causing viraemia. However, the adapted strain did not spread to the epithelial cells or the central nervous system of the mice. While this adaptation indicates a potential risk, there is no definitive evidence that the virus can spread among humans.
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Affiliation(s)
- Boyu Zhai
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Wei Ran
- Animal Husbandry and Fisheries, Guizhou Vocational College of Agriculture, Guiyang, China
| | - Yiyang Sun
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Angelita Alcos
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Mengjia Liu
- Institute of Special Animal and Plant Sciences, The Chinese Academy of Agricultural Sciences, Changchun, China
| | - Jie Chen
- Institute of Special Animal and Plant Sciences, The Chinese Academy of Agricultural Sciences, Changchun, China
| | | | - Dongbo Sun
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jianjun Zhao
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
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2
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Hirai Y, Takemoto R, Yanagi Y, Shirogane Y. Amino acid changes accumulated in the fusion protein allow neuropathogenic measles viruses to use a broad repertoire of host factors for cell fusion triggering. J Virol 2025; 99:e0230724. [PMID: 40192292 PMCID: PMC12090747 DOI: 10.1128/jvi.02307-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2024] [Accepted: 03/14/2025] [Indexed: 05/21/2025] Open
Abstract
Measles virus (MeV), an enveloped RNA virus belonging to the genus Morbillivirus of the family Paramyxoviridae, is the causative agent of measles, an acute febrile illness with skin rash. MeV has two types of envelope glycoproteins: the hemagglutinin (H) and fusion (F) protein. The H protein initially binds to its receptors, signaling lymphocytic activation molecule family member 1 (SLAMF1) and nectin-4, triggering conformational changes in the F protein that result in virus-to-cell or cell-to-cell membrane fusion. MeV may persist in the brain, which does not express SLAMF1 and nectin-4, leading to subacute sclerosing panencephalitis (SSPE) several years after acute infection. Recently, we have reported that MeV isolates from SSPE patients have hyperfusogenic amino acid changes (e.g., T461I) in the F protein, which enable MeV to spread in the brain by using cell adhesion molecule 1 (CADM1) and CADM2 as cis-acting fusion-triggering molecules. However, F proteins of SSPE isolates, such as the Patient B and OSA-3/Bs/B strains, carry additional changes besides T461I. In this study, we show that specific combinations of amino acid changes in the F proteins from SSPE isolates enable the induction of membrane fusion without CADM1/2 expression. We further demonstrate that these cumulative changes in the F protein allow the virus to exploit other fusion-triggering molecules than CADM1/2. These changes also promote efficient neuronal cell fusion. Our findings suggest that cumulative changes in the F protein may broaden the range of host factors capable of triggering cell fusion, facilitating MeV spread in the brain of SSPE patients.IMPORTANCESubacute sclerosing panencephalitis (SSPE) is a fatal disease caused by persistent infection of measles virus (MeV) in the brain. There is no effective therapy for the disease. MeV isolates from SSPE patients accumulate multiple amino acid changes in the F protein, including hyperfusogenic changes such as the T461I substitution, which allow MeV to spread in the brain by utilizing cell adhesion molecule 1 (CADM1) and CADM2 as cis-acting fusion-triggering molecules. In this study, we show that F proteins of SSPE isolates harboring additional changes besides T461I can induce membrane fusion independently of CADM1 and CADM2. The data also indicate that cumulative changes in the F protein may enable MeV to use other fusion-triggering host molecules than CADM1 and CADM2, facilitating its spread in the brain of SSPE patients. The findings deepen our understanding of the molecular mechanism underlying MeV neuropathogenicity in SSPE.
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Affiliation(s)
- Yuichi Hirai
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
- Department of Molecular Virology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan
| | - Ryuichi Takemoto
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yusuke Yanagi
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Yuta Shirogane
- Department of Molecular Virology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan
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3
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Groch KR, Miyagi SAT, Díaz-Delgado J, Santos-Neto EB, Lailson-Brito J, Brandão PE, Catão-Dias JL. Complete Genome Sequencing of the Divergent Guiana Dolphin Morbillivirus (GDMV), Brazil. Viruses 2025; 17:582. [PMID: 40285024 PMCID: PMC12031208 DOI: 10.3390/v17040582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2025] [Revised: 04/15/2025] [Accepted: 04/16/2025] [Indexed: 04/29/2025] Open
Abstract
Cetacean morbillivirus (CeMV) is a major threat to cetaceans worldwide, causing individual deaths and outbreaks of mass mortality. Based on partial sequences of the viral phosphoprotein, CeMV is subclassified into seven strains and two distinct lineages. To date, only CeMV-1 strains, including the dolphin morbillivirus (DMV), have been completely sequenced. The CeMV-2 lineage was first reported in Guiana dolphins (Sotalia guianensis) in Brazil and was associated with an unusual mortality event in 2017-2018. Here we provide the nearly complete Guiana dolphin morbillivirus (GDMV) genome sequence, representing the first within the CeMV-2 lineage. GDMV was isolated using Vero.DogSLAMtag cells, the viral RNA was extracted, and deep sequencing analysis was performed. Gaps in the viral genome were completed by Sanger sequencing. The final genome length was 15,607 nucleotides covering 99.3% of the DMV reference genome, including full sequences of the six structural proteins encoded by morbillivirus. The sequence similarity was 74-77.9% to other CeMV strains, with highest identity to the DMV. The complete L protein amino acid sequence comparison-based taxonomy indicates that GDMV is a distinct morbillivirus species; however, as GDMV and CeMV-1 strains infect a similar host spectrum, our findings support that GDMV represents a new CeMV-2 lineage.
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Affiliation(s)
- Kátia Regina Groch
- Department of Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo 05508-207, Brazil (J.L.C.-D.)
| | - Sueli Akemi Taniwaki Miyagi
- Department of Preventive Veterinary Medicine and Animal Health, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo 05508-207, Brazil
| | - Josué Díaz-Delgado
- Department of Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo 05508-207, Brazil (J.L.C.-D.)
| | - Elitieri B. Santos-Neto
- Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Rio de Janeiro State University (UERJ), Rio de Janeiro 20550-013, Brazil; (E.B.S.-N.)
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Rio de Janeiro State University (UERJ), Rio de Janeiro 20550-013, Brazil; (E.B.S.-N.)
| | - Paulo Eduardo Brandão
- Department of Preventive Veterinary Medicine and Animal Health, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo 05508-207, Brazil
| | - José Luiz Catão-Dias
- Department of Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo 05508-207, Brazil (J.L.C.-D.)
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4
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Gao Z, Sasaki J, Suzuki T, Suzuki T, Miwa Y, Sando S, Hashiguchi T, Morimoto J. Discovery of potent measles virus fusion inhibitor peptides via structure-guided derivatization. RSC Med Chem 2025; 16:1619-1625. [PMID: 39925734 PMCID: PMC11799930 DOI: 10.1039/d4md01006j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2024] [Accepted: 01/21/2025] [Indexed: 02/11/2025] Open
Abstract
Fusion inhibitor peptide (FIP), a short peptide known as a measles virus (MeV) infection inhibitor, inhibits membrane fusion between the viral envelope of MeV and the host cell membrane. Therefore, FIP is potentially useful as a drug candidate for treating MeV infection, but improvement of inhibitory activity is desirable. In this study, we conducted a structure-activity relationship study of FIP and, based on the result and the previously reported crystal structure of the complex, we designed FIP derivatives. From a series of derivatives, we discovered an FIP derivative with a strong inhibitory activity (IC50 = 210 nM) derived from the enhanced binding affinity (K D = 6.6 nM) to the MeV fusion protein.
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Affiliation(s)
- Ziwei Gao
- Depratement of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo Tokyo 113-8656 Japan
| | - Jiei Sasaki
- Laboratory of Medical Virology, Institute for Life and Medical Sciences, Kyoto University Kyoto 606-8507 Japan
| | - Tateki Suzuki
- Laboratory of Medical Virology, Institute for Life and Medical Sciences, Kyoto University Kyoto 606-8507 Japan
| | - Tomoaki Suzuki
- Depratement of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo Tokyo 113-8656 Japan
| | - Yuki Miwa
- Depratement of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo Tokyo 113-8656 Japan
| | - Shinsuke Sando
- Depratement of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo Tokyo 113-8656 Japan
- Depratement of Bioengineering, Graduate School of Engineering, The University of Tokyo Tokyo 113-8656 Japan
| | - Takao Hashiguchi
- Laboratory of Medical Virology, Institute for Life and Medical Sciences, Kyoto University Kyoto 606-8507 Japan
| | - Jumpei Morimoto
- Depratement of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo Tokyo 113-8656 Japan
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5
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Brockhurst JK, Salciccioli BE, Griffin DE. Sphingosine-1-phosphate signaling mediates shedding of measles virus-infected respiratory epithelial cells. J Virol 2025; 99:e0188024. [PMID: 40145737 PMCID: PMC11998495 DOI: 10.1128/jvi.01880-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2024] [Accepted: 03/05/2025] [Indexed: 03/28/2025] Open
Abstract
Measles virus (MeV) is an extremely infectious respiratory virus and a major cause of childhood morbidity and mortality worldwide. MeV infection of the respiratory epithelium induces shedding of multinucleate epithelial cells from the apical surface of the epithelium without compromising epithelial barrier integrity. To study the mechanisms driving the apical extrusion of MeV-infected respiratory epithelial cells, we used primary differentiated tracheal epithelial cell cultures (rhTECs) and respiratory samples from rhesus macaques infected with wild-type MeV (WT MeV) or live-attenuated MeV (LAMV). We show that sphingosine-1-phosphate (S1P) signaling, rather than cell death or inflammasome activation, plays a key role in WT MeV and LAMV-induced cell shedding. Inhibiting S1P signaling resulted in delayed shedding of clusters of infected cells and higher viral titers within the epithelium, suggesting that cell extrusion impacts viral dynamics within the respiratory tract. We also found that shedding of individual infected cells began early after apical infection, prior to the formation of infected cell clusters within the epithelium. These findings offer new insights into MeV biology and pathogenesis within the respiratory tract. IMPORTANCE Despite the availability of a safe and effective vaccine, measles virus (MeV) still has a significant global impact, and in 2022 alone led to over 136,000 deaths. MeV is one of the most contagious known viruses and spreads via the respiratory route. When respiratory epithelial cells are infected, they are shed into the lumen of the respiratory tract, but this process is poorly understood. Here, we use primary differentiated respiratory epithelial cells from rhesus macaques to show that sphingosine-1-phosphate (S1P) signaling, and not cell death or inflammasome activation, plays a role in cell shedding during both wild-type and live-attenuated MeV infection. Through this mechanism, MeV-infected cells are extruded without disrupting the integrity of the respiratory epithelium. Inhibiting S1P signaling resulted in delayed shedding of infected cells and higher viral titers in the epithelium. These findings indicate that host cellular responses play an important role in MeV infectivity.
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Affiliation(s)
- Jacqueline K. Brockhurst
- Department of Molecular and Comparative Pathobiology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Brittany E. Salciccioli
- Department of Molecular and Comparative Pathobiology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Diane E. Griffin
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
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Singh R, Gaur SK, Nagar R, Kaul R. Insights into the different mechanisms of Autophagy and Apoptosis mediated by Morbilliviruses. Virology 2025; 603:110371. [PMID: 39742556 DOI: 10.1016/j.virol.2024.110371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2024] [Revised: 12/10/2024] [Accepted: 12/20/2024] [Indexed: 01/03/2025]
Abstract
Viruses are obligate intracellular parasites that have co-evolved with the host. During the course of evolution, viruses have acquired abilities to abrogate the host's immune responses by modulating the host proteins which play a pivotal role in various biological processes. One such process is the programmed cell death in virus-infected cells, which can occur via autophagy or apoptosis. Morbilliviruses are known to modulate both autophagy and apoptosis. Upon infecting a cell, the morbilliviruses can utilize autophagosomes as their nest and delay the host defense apoptotic response, and/or can promote apoptosis to escalate the virus dissemination. Moreover, there is an active interplay between these two pathways which eventually decides the fate of a virus-infected cell. Recent advances in our understanding of these processes provide a potential rationale to further explore morbilliviruses for therapeutic purposes.
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Affiliation(s)
- Rashmi Singh
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Sharad Kumar Gaur
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Rakhi Nagar
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Rajeev Kaul
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India.
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7
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Wang Y, Li G, Wang H, Qi Q, Wang X, Lu H. Targeted therapeutic strategies for Nectin-4 in breast cancer: Recent advances and future prospects. Breast 2025; 79:103838. [PMID: 39577073 PMCID: PMC11616553 DOI: 10.1016/j.breast.2024.103838] [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: 02/15/2024] [Revised: 07/31/2024] [Accepted: 11/13/2024] [Indexed: 11/24/2024] Open
Abstract
Nectin-4 is a cell adhesion molecule which has gained more and more attention as a therapeutic target in cancer recently. Overexpression of Nectin-4 has been observed in various tumors, including breast cancer, and is associated with tumor progression. Enfortumab vedotin(EV)is an antibody-drug conjugate (ADC) targeting Nectin-4, which has been approved by FDA for the treatment of urothelial carcinoma. Notably, Nectin-4 was also investigated as a target for breast cancer in preclinical and clinical settings. Nectin-4-targeted approaches, such as ADCs, oncolytic viruses, photothermal therapy and immunotherapy, have shown promising results in early-phase clinical trials. These therapies offer novel strategies for delivering targeted treatments to Nectin-4-expressing cancer cells, enhancing treatment efficacy and minimizing off-target effects. In conclusion, this review aims to provide an overview of the latest advances in understanding the role of Nectin-4 in breast cancer and discuss the future development prospects of Nectin-4 targeted agents.
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Affiliation(s)
- Yufei Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China; Laboratory of Cancer Biology, Key Lab of Biotherapy in Zhejiang, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Guangliang Li
- Department of Medical Oncology (Breast Cancer), Zhejiang Cancer Hospital, Hangzhou, China
| | - Hanying Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Quan Qi
- Department of Medical Oncology, Huzhou Central Hospital, Huzhou, China
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China.
| | - Haiqi Lu
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China.
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8
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Yousaf I, Domanico L, Nambara T, Yadav K, Kelly LK, Trejo-Lopez J, Shieh WJ, Rota PA, Devaux P, Kanekiyo T, Taylor MP, Cattaneo R. The measles virus matrix F50S mutation from a lethal case of subacute sclerosing panencephalitis promotes receptor-independent neuronal spread. J Virol 2025; 99:e0175024. [PMID: 39641619 PMCID: PMC11784085 DOI: 10.1128/jvi.01750-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2024] [Accepted: 10/30/2024] [Indexed: 12/07/2024] Open
Abstract
Subacute sclerosing panencephalitis (SSPE) is a lethal neurological disorder occurring several years after measles. Reconstruction of the evolution of the measles virus (MeV) genome in an SSPE case suggested that the matrix (M) protein mutation M-F50S, when added to other mutations, drove neuropathogenesis. However, whether and how M-F50S would promote spread independently from other mutations was in question. We investigated here the cell specificity of MeV spread in this brain and documented that both neurons and astrocytes were heavily infected. We then generated recombinant MeV with individual mutations in the three proteins of the viral membrane fusion apparatus, M, fusion (F), and hemagglutinin (H). These viruses reached similar titers as the parental wild-type virus, kept the respective mutations upon passage, and infected cells expressing the tissue-specific MeV receptors SLAM and nectin-4 with similar efficiencies. However, after inoculation of receptor-negative neurons and astrocytes differentiated from human induced pluripotent stem cells, only MeV M-F50S spread with moderate efficiency; the parental virus and its derivatives coding for a hyperfusogenic F protein, or for a cytoplasmic tail-mutated H protein, did not spread. When delivered to primary mouse neurons by cell-mediated neurite overlay, MeV M-F50S frequently reached the cell bodies and occasionally formed small infectious centers, while the other MeV reached the cell bodies only sporadically. These results demonstrate that, in neuronal cell cultures, M-F50S can enable receptor-independent spread in the absence of other mutations, and validate the inference that this single amino acid change initiated ubiquitous MeV brain spread.IMPORTANCEMeasles virus (MeV), a non-integrating negative-strand RNA virus, rarely causes subacute sclerosing panencephalitis (SSPE) several years after acute infection. During brain adaptation, the MeV genome acquires multiple mutations reducing the dependence of its membrane fusion apparatus (MFA) from an activating receptor. It was proposed that one of these mutations, matrix protein F50S, drove neuropathogenesis in an SSPE case. We report here that, in two types of neuronal cultures, a recombinant MeV with only this mutation gained receptor-independent spread, whereas viruses expressing MFA proteins with other mutations acquired during brain adaptation did not. Our results validate the inference that M-F50S initiated ubiquitous MeV brain spread resulting in lethal disease. They also prompt studies of the impact of analogous amino acid changes of the M proteins of other nonsegmented negative-strand RNA viruses on their interactions with membrane lipids and cytoskeletal components.
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Affiliation(s)
- Iris Yousaf
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Luke Domanico
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, Montana, USA
| | | | - Kalpana Yadav
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Lauren K. Kelly
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Jorge Trejo-Lopez
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Wun-Ju Shieh
- Infectious Diseases Pathology Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Paul A. Rota
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Patricia Devaux
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Matthew P. Taylor
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, Montana, USA
| | - Roberto Cattaneo
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota, USA
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
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9
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Gaur SK, Jain J, Chaudhary Y, Kaul R. Insights into the mechanism of Morbillivirus induced immune suppression. Virology 2024; 600:110212. [PMID: 39232265 DOI: 10.1016/j.virol.2024.110212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 07/26/2024] [Accepted: 08/29/2024] [Indexed: 09/06/2024]
Abstract
Viruses enter the host cell, and various strategies are employed to evade the host immune system. These include overcoming the various components of the immune system, including modulation of the physical and chemical barriers, non-specific innate response and specific adaptive immune response. Morbilliviruses impose immune modulation by utilizing various approaches including hindering antigen presentation to T-Helper (TH) cells, hematopoiesis and suppression of effector molecule activities. These viruses can also impede the early stages of T cell activation. Despite the availability of effective vaccines, morbilliviruses are still a significant threat to mankind. After infection, they also induce a state of immune suppression in the host. The molecular mechanisms employed by morbilliviruses to induce the state of immune suppression in the infected host are still being investigated. This review is an attempt to summarize insights into some of the strategies adopted by morbilliviruses to mediate immune modulation in the host.
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Affiliation(s)
- Sharad Kumar Gaur
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Juhi Jain
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Yash Chaudhary
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Rajeev Kaul
- Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India.
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10
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Aymoz-Bressot T, Canis M, Meurisse F, Wijkhuisen A, Favier B, Mousseau G, Dupressoir A, Heidmann T, Bacquin A. Cell-Int: a cell-cell interaction assay to identify native membrane protein interactions. Life Sci Alliance 2024; 7:e202402844. [PMID: 39237366 PMCID: PMC11377309 DOI: 10.26508/lsa.202402844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 08/29/2024] [Accepted: 08/29/2024] [Indexed: 09/07/2024] Open
Abstract
Intercellular protein-protein interactions (PPIs) have pivotal roles in biological functions and diseases. Membrane proteins are therefore a major class of drug targets. However, studying such intercellular PPIs is challenging because of the properties of membrane proteins. Current methods commonly use purified or modified proteins that are not physiologically relevant and hence might mischaracterize interactions occurring in vivo. Here, we describe Cell-Int: a cell interaction assay for studying plasma membrane PPIs. The interaction signal is measured through conjugate formation between two populations of cells each expressing either a ligand or a receptor. In these settings, membrane proteins are in their native environment thus being physiologically relevant. Cell-Int has been applied to the study of diverse protein partners, and enables to investigate the inhibitory potential of blocking antibodies, as well as the retargeting of fusion proteins for therapeutic development. The assay was also validated for screening applications and could serve as a platform for identifying new protein interactors.
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Affiliation(s)
- Thibaud Aymoz-Bressot
- CNRS UMR9196, Laboratory of Molecular Physiology and Pathology of Endogenous and Infectious Retroviruses, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Marie Canis
- CNRS UMR9196, Laboratory of Molecular Physiology and Pathology of Endogenous and Infectious Retroviruses, Gustave Roussy, Université Paris-Saclay, Villejuif, France
- VIROXIS, Gustave Roussy, Villejuif, France
| | - Florian Meurisse
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Paris, France
| | - Anne Wijkhuisen
- Université Paris-Saclay, CEA, INRAE, Médicaments et Technologies pour la Santé (MTS), Gif-sur-Yvette, France
| | - Benoit Favier
- Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), Paris, France
| | | | - Anne Dupressoir
- CNRS UMR9196, Laboratory of Molecular Physiology and Pathology of Endogenous and Infectious Retroviruses, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Thierry Heidmann
- CNRS UMR9196, Laboratory of Molecular Physiology and Pathology of Endogenous and Infectious Retroviruses, Gustave Roussy, Université Paris-Saclay, Villejuif, France
- VIROXIS, Gustave Roussy, Villejuif, France
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11
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Branda F, Pavia G, Ciccozzi A, Quirino A, Marascio N, Matera G, Romano C, Locci C, Azzena I, Pascale N, Sanna D, Casu M, Ceccarelli G, Ciccozzi M, Scarpa F. Zoonotic Paramyxoviruses: Evolution, Ecology, and Public Health Strategies in a Changing World. Viruses 2024; 16:1688. [PMID: 39599803 PMCID: PMC11599060 DOI: 10.3390/v16111688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2024] [Revised: 10/25/2024] [Accepted: 10/28/2024] [Indexed: 11/29/2024] Open
Abstract
The family Paramyxoviridae includes a number of negative RNA viruses known for their wide host range and significant zoonotic potential. In recent years, there has been a surge in the identification of emerging zoonotic paramyxoviruses, particularly those hosted by bat species, which serve as key reservoirs. Among these, the genera Henipavirus and Pararubulavirus are of particular concern. Henipaviruses, including the highly pathogenic Hendra and Nipah viruses, have caused severe outbreaks with high mortality rates in both humans and animals. In contrast, zoonotic pararubulaviruses such as the Menangle virus typically induce mild symptoms or remain asymptomatic in human hosts. This review summarizes current knowledge on the evolution, ecology, and epidemiology of emerging zoonotic paramyxoviruses, focusing on recently discovered viruses and their potential to cause future epidemics. We explore the molecular mechanisms underlying host-switching events, viral replication strategies, and immune evasion tactics that facilitate interspecies transmission. In addition, we discuss ecological factors influencing virus emergence, including changes in bat populations and habitats and the role of wildlife-human interfaces. We also examine the public health impact of these emerging viruses, underlining the importance of enhanced surveillance, developing improved diagnostic tools, and implementing proactive strategies to prevent potential outbreaks. By providing a comprehensive overview of recent advances and gaps in knowledge, this review aims to inform future research directions and public health policies related to zoonotic paramyxoviruses.
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Affiliation(s)
- Francesco Branda
- Unit of Medical Statistics and Molecular Epidemiology, Università Campus Bio-Medico di Roma, 00128 Rome, Italy (M.C.)
| | - Grazia Pavia
- Unit of Clinical Microbiology, Department of Health Sciences, “Magna Græcia” University of Catanzaro—“Renato Dulbecco” Teaching Hospital, 88100 Catanzaro, Italy; (G.P.); (A.Q.); (N.M.); (G.M.)
| | - Alessandra Ciccozzi
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (A.C.); (C.L.); (D.S.)
| | - Angela Quirino
- Unit of Clinical Microbiology, Department of Health Sciences, “Magna Græcia” University of Catanzaro—“Renato Dulbecco” Teaching Hospital, 88100 Catanzaro, Italy; (G.P.); (A.Q.); (N.M.); (G.M.)
| | - Nadia Marascio
- Unit of Clinical Microbiology, Department of Health Sciences, “Magna Græcia” University of Catanzaro—“Renato Dulbecco” Teaching Hospital, 88100 Catanzaro, Italy; (G.P.); (A.Q.); (N.M.); (G.M.)
| | - Giovanni Matera
- Unit of Clinical Microbiology, Department of Health Sciences, “Magna Græcia” University of Catanzaro—“Renato Dulbecco” Teaching Hospital, 88100 Catanzaro, Italy; (G.P.); (A.Q.); (N.M.); (G.M.)
| | - Chiara Romano
- Unit of Medical Statistics and Molecular Epidemiology, Università Campus Bio-Medico di Roma, 00128 Rome, Italy (M.C.)
| | - Chiara Locci
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (A.C.); (C.L.); (D.S.)
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (I.A.); (N.P.); (M.C.)
| | - Ilenia Azzena
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (I.A.); (N.P.); (M.C.)
| | - Noemi Pascale
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (I.A.); (N.P.); (M.C.)
- Department of Chemical Physical Mathematical and Natural Sciences, University of Sassari, 07100 Sassari, Italy
| | - Daria Sanna
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (A.C.); (C.L.); (D.S.)
| | - Marco Casu
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy; (I.A.); (N.P.); (M.C.)
| | - Giancarlo Ceccarelli
- Department of Public Health and Infectious Diseases, University Hospital Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy;
| | - Massimo Ciccozzi
- Unit of Medical Statistics and Molecular Epidemiology, Università Campus Bio-Medico di Roma, 00128 Rome, Italy (M.C.)
| | - Fabio Scarpa
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (A.C.); (C.L.); (D.S.)
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12
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BenDavid E, Yang C, Zhou Y, Pfaller CK, Samuel CE, Ma D. Host WD repeat-containing protein 5 inhibits protein kinase R-mediated integrated stress response during measles virus infection. J Virol 2024; 98:e0102024. [PMID: 39194235 PMCID: PMC11406981 DOI: 10.1128/jvi.01020-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 07/09/2024] [Indexed: 08/29/2024] Open
Abstract
Some negative-sense RNA viruses, including measles virus (MeV), share the characteristic that during their infection cycle, cytoplasmic inclusion bodies (IBs) are formed where components of the viral replication machinery are concentrated. As a foci of viral replication, how IBs act to enhance the efficiency of infection by affecting virus-host interactions remains an important topic of investigation. We previously established that upon MeV infection, the epigenetic host protein, WD repeat-containing protein 5 (WDR5), translocates to cytoplasmic viral IBs and facilitates MeV replication. We now show that WDR5 is recruited to IBs by forming a complex with IB-associated MeV phosphoprotein via a conserved binding motif located on the surface of WDR5. Furthermore, we provide evidence that WDR5 promotes viral replication by suppressing a major innate immune response pathway, the double-stranded RNA-mediated activation of protein kinase R and integrated stress response. IMPORTANCE MeV is a pathogen that remains a global concern, with an estimated 9 million measles cases and 128,000 measles deaths in 2022 according to the World Health Organization. A large population of the world still has inadequate access to the effective vaccine against the exceptionally transmissible MeV. Measles disease is characterized by a high morbidity in children and in immunocompromised individuals. An important area of research for negative-sense RNA viruses, including MeV, is the characterization of the complex interactome between virus and host occurring at cytoplasmic IBs where viral replication occurs. Despite the progress made in understanding IB structures, little is known regarding the virus-host interactions within IBs and the role of these interactions in promoting viral replication and antagonizing host innate immunity. Herein we provide evidence suggesting a model by which MeV IBs utilize the host protein WDR5 to suppress the protein kinase R-integrated stress response pathway.
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Affiliation(s)
- Ethan BenDavid
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, California, USA
| | - Chuyuan Yang
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, California, USA
| | - Yuqin Zhou
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, California, USA
| | - Christian K. Pfaller
- Division of Veterinary Medicine, Paul-Ehrlich-Institute, Langen, Germany
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Charles E. Samuel
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, California, USA
- Neuroscience Research Institute, University of California, Santa Barbara, California, USA
| | - Dzwokai Ma
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, California, USA
- Neuroscience Research Institute, University of California, Santa Barbara, California, USA
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13
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Acklin JA, Patel AR, Kurland AP, Horiuchi S, Moss AS, DeGrace EJ, Ikegame S, Carmichael J, Kowdle S, Thibault PA, Imai N, Ueno H, Tweel B, Johnson JR, Rosenberg BR, Lee B, Lim JK. Immunological landscape of human lymphoid explants during measles virus infection. JCI Insight 2024; 9:e172261. [PMID: 39253971 PMCID: PMC11385098 DOI: 10.1172/jci.insight.172261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 07/23/2024] [Indexed: 09/11/2024] Open
Abstract
In humans, lymph nodes are the primary site of measles virus (MeV) replication. To understand the immunological events that occur at this site, we infected human lymphoid tissue explants using a pathogenic strain of MeV that expresses GFP. We found that MeV infected 5%-15% of cells across donors. Using single-cell RNA-Seq and flow cytometry, we found that while most of the 29 cell populations identified in the lymphoid culture were susceptible to MeV, there was a broad preferential infection of B cells and reduced infection of T cells. Further subsetting of T cells revealed that this reduction may be driven by the decreased infection of naive T cells. Transcriptional changes in infected B cells were dominated by an interferon-stimulated gene (ISG) signature. To determine which of these ISGs were most substantial, we evaluated the proteome of MeV-infected Raji cells by mass spectrometry. We found that IFIT1, IFIT2, IFIT3, ISG15, CXCL10, MX2, and XAF1 proteins were the most highly induced and positively correlated with their expression in the transcriptome. These data provide insight into the immunological events that occur in lymph nodes during infection and may lead to the development of therapeutic interventions.
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Affiliation(s)
- Joshua A Acklin
- Department of Microbiology
- Graduate School of Biomedical Sciences, and
| | - Aum R Patel
- Department of Microbiology
- Graduate School of Biomedical Sciences, and
| | | | | | | | - Emma J DeGrace
- Department of Microbiology
- Graduate School of Biomedical Sciences, and
| | | | | | | | | | | | | | - Benjamin Tweel
- Department of Otolaryngology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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14
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Fukuhara H, Yumoto K, Sako M, Kajikawa M, Ose T, Kawamura M, Yoda M, Chen S, Ito Y, Takeda S, Mwaba M, Wang J, Hashiguchi T, Kamishikiryo J, Maita N, Kitatsuji C, Takeda M, Kuroki K, Maenaka K. Glycan-shielded homodimer structure and dynamical features of the canine distemper virus hemagglutinin relevant for viral entry and efficient vaccination. eLife 2024; 12:RP88929. [PMID: 39046448 PMCID: PMC11268888 DOI: 10.7554/elife.88929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024] Open
Abstract
Canine distemper virus (CDV) belongs to morbillivirus, including measles virus (MeV) and rinderpest virus, which causes serious immunological and neurological disorders in carnivores, including dogs and rhesus monkeys, as recently reported, but their vaccines are highly effective. The attachment glycoprotein hemagglutinin (CDV-H) at the CDV surface utilizes signaling lymphocyte activation molecule (SLAM) and Nectin-4 (also called poliovirus-receptor-like-4; PVRL4) as entry receptors. Although fusion models have been proposed, the molecular mechanism of morbillivirus fusion entry is poorly understood. Here, we determined the crystal structure of the globular head domain of CDV-H vaccine strain at 3.2 Å resolution, revealing that CDV-H exhibits a highly tilted homodimeric form with a six-bladed β-propeller fold. While the predicted Nectin-4-binding site is well conserved with that of MeV-H, that of SLAM is similar but partially different, which is expected to contribute to host specificity. Five N-linked sugars covered a broad area of the CDV-H surface to expose receptor-binding sites only, supporting the effective production of neutralizing antibodies. These features are common to MeV-H, although the glycosylation sites are completely different. Furthermore, real-time observation using high-speed atomic force microscopy revealed highly mobile features of the CDV-H dimeric head via the connector region. These results suggest that sugar-shielded tilted homodimeric structure and dynamic conformational changes are common characteristics of morbilliviruses and ensure effective fusion entry and vaccination.
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Affiliation(s)
- Hideo Fukuhara
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
- Division of Pathogen Structure, Research Center for Zoonosis Control, Hokkaido UniversitySapporoJapan
| | - Kohei Yumoto
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Miyuki Sako
- Medical Institute of Bioregulation, Kyushu UniversityFukuokaJapan
| | - Mizuho Kajikawa
- Medical Institute of Bioregulation, Kyushu UniversityFukuokaJapan
| | - Toyoyuki Ose
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Mihiro Kawamura
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Mei Yoda
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Surui Chen
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Yuri Ito
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Shin Takeda
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Mwila Mwaba
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Jiaqi Wang
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Takao Hashiguchi
- Department of Virology, Faculty of Medicine, Kyushu UniversityFukuokaJapan
| | - Jun Kamishikiryo
- Medical Institute of Bioregulation, Kyushu UniversityFukuokaJapan
| | - Nobuo Maita
- Institute for Enzyme Research, University of TokushimaTokushimaJapan
| | - Chihiro Kitatsuji
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Makoto Takeda
- Department of Microbiology, Graduate School of Medicine and Faculty of Medicine, The University of TokyoTokyoJapan
| | - Kimiko Kuroki
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
| | - Katsumi Maenaka
- Laboratory of Biomolecular Science and Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporoJapan
- Division of Pathogen Structure, Research Center for Zoonosis Control, Hokkaido UniversitySapporoJapan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido UniversitySapporoJapan
- Institute for Vaccine Research and Development (HU-IVReD), Hokkaido UniversitySapporoJapan
- Core Research for Evolutional Science and Technology, Japan Science and Technology AgencySaitamaJapan
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15
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Dai R, Xia B, Wang M, Huang M, Chen L, Huang Y, Chen T. Japanese medaka (Oryzias latipes) Nectin4 plays an important role against red spotted grouper nervous necrosis virus infection. FISH & SHELLFISH IMMUNOLOGY 2024; 150:109650. [PMID: 38788912 DOI: 10.1016/j.fsi.2024.109650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 05/21/2024] [Accepted: 05/21/2024] [Indexed: 05/26/2024]
Abstract
Nectins are adhesion molecules that play a crucial role in the organization of epithelial and endothelial junctions and function as receptors for the entry of herpes simplex virus. However, the role of Nectin4 remains poorly understood in fish. In this study, nectin4 gene was cloned from medaka (OlNectin4). OlNectin4 was located on chromosome 18 and contained 11 exons, with a total genome length of 25754 bp, coding sequences of 1689 bp, coding 562 amino acids and a molecular weight of 65.5 kDa. OlNectin4 contained four regions, including an Immunoglobulin region, an Immunoglobulin C-2 Type region, a Transmembrane region and a Coiled coil region. OlNectin4 shared 47.18 % and 25.00 % identity to Paralichthys olivaceus and Mus musculus, respectively. In adult medaka, the transcript of nectin4 was predominantly detected in gill. During red spotted grouper nervous necrosis virus (RGNNV) infection, overexpression of OlNectin4 in GE cells significantly increased viral gene transcriptions. Meanwhile, Two mutants named OlNectin4△4 (+4 bp) and OlNectin4△7 (-7 bp) medaka were established using CRISPR-Cas9 system. Nectin4-KO medaka had higher mortality than WT after infected with RGNNV. Moreover, the expression of RGNNV RNA2 gene in different tissues of the Nectin4-KO were higher than WT medaka after challenged with RGNNV. The brain and eye of Nectin4-KO medaka which RGNNV mainly enriched, exhibited significantly higher expression of interferon signaling genes than in WT. Taken together, the OlNectin4 plays a complex role against RGNNV infection by inducing interferon responses for viral clearance.
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Affiliation(s)
- Ronggui Dai
- State Key Laboratory of Mariculture Breeding, Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College of Jimei University, Xiamen, 361021, China
| | - Bilin Xia
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, 430070, China
| | - Mengyang Wang
- State Key Laboratory of Mariculture Breeding, Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College of Jimei University, Xiamen, 361021, China
| | - Mingxi Huang
- State Key Laboratory of Mariculture Breeding, Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College of Jimei University, Xiamen, 361021, China
| | - Lei Chen
- State Key Laboratory of Mariculture Breeding, Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College of Jimei University, Xiamen, 361021, China
| | - Yan Huang
- State Key Laboratory of Mariculture Breeding, Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College of Jimei University, Xiamen, 361021, China
| | - Tiansheng Chen
- State Key Laboratory of Mariculture Breeding, Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Fisheries College of Jimei University, Xiamen, 361021, China.
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16
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Park IW, Fiadjoe HK, Chaudhary P. Impact of Annexin A2 on virus life cycles. Virus Res 2024; 345:199384. [PMID: 38702018 PMCID: PMC11091703 DOI: 10.1016/j.virusres.2024.199384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/29/2024] [Accepted: 04/30/2024] [Indexed: 05/06/2024]
Abstract
Due to the limited size of viral genomes, hijacking host machinery by the viruses taking place throughout the virus life cycle is inevitable for the survival and proliferation of the virus in the infected hosts. Recent reports indicated that Annexin A2 (AnxA2), a calcium- and lipid-binding cellular protein, plays an important role as a critical regulator in various steps of the virus life cycle. The multifarious AnxA2 functions in cells, such as adhesion, adsorption, endocytosis, exocytosis, cell proliferation and division, inflammation, cancer metastasis, angiogenesis, etc., are intimately related to the various clinical courses of viral infection. Ubiquitous expression of AnxA2 across multiple cell types indicates the broad range of susceptibility of diverse species of the virus to induce disparate viral disease in various tissues, and intracellular expression of AnxA2 in the cytoplasmic membrane, cytosol, and nucleus suggests the involvement of AnxA2 in the regulation of the different stages of various virus life cycles within host cells. However, it is yet unclear as to the molecular processes on how AnxA2 and the infected virus interplay to regulate virus life cycles and thereby the virus-associated disease courses, and hence elucidation of the molecular mechanisms on AnxA2-mediated virus life cycle will provide essential clues to develop therapeutics deterring viral disease.
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Affiliation(s)
- In-Woo Park
- Department of Microbiology, Immunology, and Genetics, University of North Texas Health Science Center, Fort Worth, TX 76107, United States.
| | - Hope K Fiadjoe
- Department of Microbiology, Immunology, and Genetics, University of North Texas Health Science Center, Fort Worth, TX 76107, United States
| | - Pankaj Chaudhary
- Department of Microbiology, Immunology, and Genetics, University of North Texas Health Science Center, Fort Worth, TX 76107, United States.
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17
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Zyla DS, Della Marca R, Niemeyer G, Zipursky G, Stearns K, Leedale C, Sobolik EB, Callaway HM, Hariharan C, Peng W, Parekh D, Marcink TC, Diaz Avalos R, Horvat B, Mathieu C, Snijder J, Greninger AL, Hastie KM, Niewiesk S, Moscona A, Porotto M, Ollmann Saphire E. A neutralizing antibody prevents postfusion transition of measles virus fusion protein. Science 2024; 384:eadm8693. [PMID: 38935733 DOI: 10.1126/science.adm8693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 04/28/2024] [Indexed: 06/29/2024]
Abstract
Measles virus (MeV) presents a public health threat that is escalating as vaccine coverage in the general population declines and as populations of immunocompromised individuals, who cannot be vaccinated, increase. There are no approved therapeutics for MeV. Neutralizing antibodies targeting viral fusion are one potential therapeutic approach but have not yet been structurally characterized or advanced to clinical use. We present cryo-electron microscopy (cryo-EM) structures of prefusion F alone [2.1-angstrom (Å) resolution], F complexed with a fusion-inhibitory peptide (2.3-Å resolution), F complexed with the neutralizing and protective monoclonal antibody (mAb) 77 (2.6-Å resolution), and an additional structure of postfusion F (2.7-Å resolution). In vitro assays and examination of additional EM classes show that mAb 77 binds prefusion F, arrests F in an intermediate state, and prevents transition to the postfusion conformation. These structures shed light on antibody-mediated neutralization that involves arrest of fusion proteins in an intermediate state.
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Affiliation(s)
- Dawid S Zyla
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Roberta Della Marca
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli," 81100 Caserta, Italy
| | - Gele Niemeyer
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
- Institute of Biochemistry, Center for Structural and Cell Biology in Medicine, University of Luebeck, D-23538 Luebeck, Germany
| | - Gillian Zipursky
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Kyle Stearns
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Cameron Leedale
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Elizabeth B Sobolik
- Department of Laboratory Medicine and Pathology Virology Division, University of Washington, Seattle, WA 98109, USA
| | - Heather M Callaway
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Chitra Hariharan
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Weiwei Peng
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht, Netherlands
- Netherlands Proteomics Center, 3584 CH Utrecht, Netherlands
| | - Diptiben Parekh
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Tara C Marcink
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Ruben Diaz Avalos
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Branka Horvat
- Immunobiology of Viral Infections, International Center for Infectiology Research-CIRI, INSERM U1111, CNRS UMR5308, University Lyon 1, ENS de Lyon, 69007 Lyon, France
| | - Cyrille Mathieu
- Centre International de Recherche en Infectiologie équipe Neuro-Invasion, TROpism and VIRal Encephalitis (NITROVIRE), INSERM U1111-Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Université Lyon, 69007 Lyon, France
| | - Joost Snijder
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht, Netherlands
- Netherlands Proteomics Center, 3584 CH Utrecht, Netherlands
| | - Alexander L Greninger
- Department of Laboratory Medicine and Pathology Virology Division, University of Washington, Seattle, WA 98109, USA
| | - Kathryn M Hastie
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Stefan Niewiesk
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Anne Moscona
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Microbiology and Immunology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Physiology and Cellular Biophysics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - Matteo Porotto
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli," 81100 Caserta, Italy
| | - Erica Ollmann Saphire
- Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
- Department of Medicine, University of California, San Diego, La Jolla, CA 92037, USA
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18
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Gaur SK, Chaudhary Y, Jain J, Singh R, Kaul R. Structural and functional characterization of peste des petits ruminants virus coded hemagglutinin protein using various in-silico approaches. Front Microbiol 2024; 15:1427606. [PMID: 38966393 PMCID: PMC11222573 DOI: 10.3389/fmicb.2024.1427606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 06/10/2024] [Indexed: 07/06/2024] Open
Abstract
Peste des petits ruminants (PPR), a disease of socioeconomic importance has been a serious threat to small ruminants. The causative agent of this disease is PPR virus (PPRV) which belongs to the genus Morbillivirus. Hemagglutinin (H) is a PPRV coded transmembrane protein embedded in the viral envelope and plays a vital role in mediating the entry of virion particle into the cell. The infected host mounts an effective humoral response against H protein which is important for host to overcome the infection. In the present study, we have investigated structural, physiological and functional properties of hemagglutinin protein using various computational tools. The sequence analysis and structure prediction analysis show that hemagglutinin protein comprises of beta sheets as the predominant secondary structure, and may lack neuraminidase activity. PPRV-H consists of several important domains and motifs that form an essential scaffold which impart various critical roles to the protein. Comparative modeling predicted the protein to exist as a homo-tetramer that binds to its cognate cellular receptors. Certain amino acid substitutions identified by multiple sequence alignment were found to alter the predicted structure of the protein. PPRV-H through its predicted interaction with TLR-2 molecule may drive the expression of CD150 which could further propagate the virus into the host. Together, our study provides new insights into PPRV-H protein structure and its predicted functions.
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Affiliation(s)
| | | | | | | | - Rajeev Kaul
- Department of Microbiology, University of Delhi South Campus, New Delhi, India
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19
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Schmitz KS, Handrejk K, Liepina L, Bauer L, Haas GD, van Puijfelik F, Veldhuis Kroeze EJB, Riekstina M, Strautmanis J, Cao H, Verdijk RM, GeurtsvanKessel CH, van Boheemen S, van Riel D, Lee B, Porotto M, de Swart RL, de Vries RD. Functional properties of measles virus proteins derived from a subacute sclerosing panencephalitis patient who received repeated remdesivir treatments. J Virol 2024; 98:e0187423. [PMID: 38329336 PMCID: PMC10949486 DOI: 10.1128/jvi.01874-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/16/2024] [Indexed: 02/09/2024] Open
Abstract
Subacute sclerosing panencephalitis (SSPE) is a rare but fatal late neurological complication of measles, caused by persistent measles virus (MeV) infection of the central nervous system. There are no drugs approved for the treatment of SSPE. Here, we followed the clinical progression of a 5-year-old SSPE patient after treatment with the nucleoside analog remdesivir, conducted a post-mortem evaluation of the patient's brain, and characterized the MeV detected in the brain. The quality of life of the patient transiently improved after the first two courses of remdesivir, but a third course had no further clinical effect, and the patient eventually succumbed to his condition. Post-mortem evaluation of the brain displayed histopathological changes including loss of neurons and demyelination paired with abundant presence of MeV RNA-positive cells throughout the brain. Next-generation sequencing of RNA isolated from the brain revealed a complete MeV genome with mutations that are typically detected in SSPE, characterized by a hypermutated M gene. Additional mutations were detected in the polymerase (L) gene, which were not associated with resistance to remdesivir. Functional characterization showed that mutations in the F gene led to a hyperfusogenic phenotype predominantly mediated by N465I. Additionally, recombinant wild-type-based MeV with the SSPE-F gene or the F gene with the N465I mutation was no longer lymphotropic but instead efficiently disseminated in neural cultures. Altogether, this case encourages further investigation of remdesivir as a potential treatment of SSPE and highlights the necessity to functionally understand SSPE-causing MeV.IMPORTANCEMeasles virus (MeV) causes acute, systemic disease and remains an important cause of morbidity and mortality in humans. Despite the lack of known entry receptors in the brain, MeV can persistently infect the brain causing the rare but fatal neurological disorder subacute sclerosing panencephalitis (SSPE). SSPE-causing MeVs are characterized by a hypermutated genome and a hyperfusogenic F protein that facilitates the rapid spread of MeV throughout the brain. No treatment against SSPE is available, but the nucleoside analog remdesivir was recently demonstrated to be effective against MeV in vitro. We show that treatment of an SSPE patient with remdesivir led to transient clinical improvement and did not induce viral escape mutants, encouraging the future use of remdesivir in SSPE patients. Functional characterization of the viral proteins sheds light on the shared properties of SSPE-causing MeVs and further contributes to understanding how those viruses cause disease.
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Affiliation(s)
| | - Kim Handrejk
- Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands
| | - Lelde Liepina
- Clinic for Pediatric Neurology and Neurosurgery, Children’s Clinical University Hospital, Riga, Latvia
| | - Lisa Bauer
- Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands
| | - Griffin D. Haas
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | - Marta Riekstina
- Department of Pathology, Children’s Clinical University Hospital, Riga, Latvia
| | - Jurgis Strautmanis
- Clinic for Pediatric Neurology and Neurosurgery, Children’s Clinical University Hospital, Riga, Latvia
| | - Huyen Cao
- Departments of Clinical Research, Biometrics, and Virology, Gilead Sciences, Inc., Foster City, California, USA
| | - Robert M. Verdijk
- Department of Pathology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | | | | | - Debby van Riel
- Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands
| | - Benhur Lee
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Matteo Porotto
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York, USA
- Center for Host–Pathogen Interaction, Columbia University Irving Medical Center, New York, New York, USA
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Caserta, Italy
| | - Rik L. de Swart
- Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands
| | - Rory D. de Vries
- Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands
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20
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Schmitz KS, Rennick LJ, Tilston-Lunel NL, Comvalius AD, Laksono BM, Geers D, van Run P, de Vries RD, de Swart RL, Duprex WP. Rational attenuation of canine distemper virus (CDV) to develop a morbillivirus animal model that mimics measles in humans. J Virol 2024; 98:e0185023. [PMID: 38415596 PMCID: PMC10949419 DOI: 10.1128/jvi.01850-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 02/05/2024] [Indexed: 02/29/2024] Open
Abstract
Morbilliviruses are members of the family Paramyxoviridae and are known for their ability to cause systemic disease in a variety of mammalian hosts. The prototypic morbillivirus, measles virus (MeV), infects humans and still causes morbidity and mortality in unvaccinated children and young adults. Experimental infection studies in non-human primates have contributed to the understanding of measles pathogenesis. However, ethical restrictions call for the development of new animal models. Canine distemper virus (CDV) infects a wide range of animals, including ferrets, and its pathogenesis shares many features with measles. However, wild-type CDV infection is almost always lethal, while MeV infection is usually self-limiting. Here, we made five recombinant CDVs, predicted to be attenuated, and compared their pathogenesis to the non-attenuated recombinant CDV in a ferret model. Three viruses were insufficiently attenuated based on clinical signs, fatality, and systemic infection, while one virus was too attenuated. The last candidate virus caused a self-limiting infection associated with transient viremia and viral dissemination to all lymphoid tissues, was shed transiently from the upper respiratory tract, and did not result in acute neurological signs. Additionally, an in-depth phenotyping of the infected white blood cells showed lower infection percentages in all lymphocyte subsets when compared to the non-attenuated CDV. In conclusion, infection models using this candidate virus mimic measles and can be used to study pathogenesis-related questions and to test interventions for morbilliviruses in a natural host species.IMPORTANCEMorbilliviruses are transmitted via the respiratory route but cause systemic disease. The viruses use two cellular receptors to infect myeloid, lymphoid, and epithelial cells. Measles virus (MeV) remains an important cause of morbidity and mortality in humans, requiring animal models to study pathogenesis or intervention strategies. Experimental MeV infections in non-human primates are restricted by ethical and practical constraints, and animal morbillivirus infections in natural host species have been considered as alternatives. Inoculation of ferrets with wild-type canine distemper virus (CDV) has been used for this purpose, but in most cases, the virus overwhelms the immune system and causes highly lethal disease. Introduction of an additional transcription unit and an additional attenuating point mutation in the polymerase yielded a candidate virus that caused self-limiting disease with transient viremia and virus shedding. This rationally attenuated CDV strain can be used for experimental morbillivirus infections in ferrets that reflect measles in humans.
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Affiliation(s)
| | - Linda J. Rennick
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Natasha L. Tilston-Lunel
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | | | | | - Daryl Geers
- Department of Viroscience, Erasmus MC, Rotterdam, the Netherlands
| | - Peter van Run
- Department of Viroscience, Erasmus MC, Rotterdam, the Netherlands
| | - Rory D. de Vries
- Department of Viroscience, Erasmus MC, Rotterdam, the Netherlands
| | - Rik L. de Swart
- Department of Viroscience, Erasmus MC, Rotterdam, the Netherlands
| | - W. Paul Duprex
- Center for Vaccine Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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21
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Liu CH, Leu SJ, Lee CH, Lin CY, Wang WC, Tsai BY, Lee YC, Chen CL, Yang YY, Lin LT. Production and characterization of single-chain variable fragment antibodies targeting the breast cancer tumor marker nectin-4. Front Immunol 2024; 14:1292019. [PMID: 38288120 PMCID: PMC10822971 DOI: 10.3389/fimmu.2023.1292019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 12/11/2023] [Indexed: 01/31/2024] Open
Abstract
Background Nectin-4 is a novel biomarker overexpressed in various types of cancer, including breast cancer, in which it has been associated with poor prognosis. Current literature suggests that nectin-4 has a role in cancer progression and may have prognostic and therapeutic implications. The present study aims to produce nectin-4-specific single-chain variable fragment (scFv) antibodies and evaluate their applications in breast cancer cell lines and clinical specimens. Methods We generated recombinant nectin-4 ectodomain fragments as immunogens to immunize chickens and the chickens' immunoglobulin genes were amplified for construction of anti-nectin-4 scFv libraries using phage display. The binding capacities of the selected clones were evaluated with the recombinant nectin-4 fragments, breast cancer cell lines, and paraffin-embedded tissue sections using various laboratory approaches. The binding affinity and in silico docking profile were also characterized. Results We have selected two clones (S21 and L4) from the libraries with superior binding capacity. S21 yielded higher signals when used as the primry antibody for western blot analysis and flow cytometry, whereas clone L4 generated cleaner and stronger signals in immunofluorescence and immunohistochemistry staining. In addition, both scFvs could diminish attachment-free cell aggregation of nectin-4-positive breast cancer cells. As results from ELISA indicated that L4 bound more efficiently to fixed nectin-4 ectodomain, molecular docking analysis was further performed and demonstrated that L4 possesses multiple polar contacts with nectin-4 and diversity in interacting residues. Conclusion Overall, the nectin-4-specific scFvs could recognize nectin-4 expressed by breast cancer cells and have the merit of being further explored for potential diagnostic and therapeutic applications.
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Affiliation(s)
- Ching-Hsuan Liu
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Sy-Jye Leu
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chi-Hsin Lee
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
- Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Cheng-Yuan Lin
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Wei-Chu Wang
- Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | | | - Yu-Ching Lee
- The Center of Translational Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chi-Long Chen
- Department of Pathology, School of Medicine, College of Medicine, Taipei Medical University and Taipei Medical University Hospital, Taipei, Taiwan
| | - Yi-Yuan Yang
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
- Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
- Core Laboratory of Antibody Generation and Research, Taipei Medical University, Taipei, Taiwan
| | - Liang-Tzung Lin
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
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22
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Navaratnarajah CK. A Quantitative Fusion Assay to Study Measles Virus Entry. Methods Mol Biol 2024; 2808:1-7. [PMID: 38743358 DOI: 10.1007/978-1-0716-3870-5_1] [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] [Indexed: 05/16/2024]
Abstract
We have adopted a real-time assay based on a dual-split reporter to assess cell-cell fusion mediated by the measles virus (MeV) membrane fusion machinery. This reporter system is comprised of two expression vectors, each encoding a segment of Renilla luciferase fused to a segment of GFP. To regain function, the two segments need to associate, which is dependent on cell-cell fusion between effector cells expressing the MeV fusion machinery and target cells expressing the corresponding MeV receptor. By measuring reconstituted luciferase activity, we can follow the kinetics of cell-cell fusion and quantify the extent of fusion. This assay lends itself to the study of the MeV fusion machinery comprised of the attachment and fusion glycoproteins, the matrix protein, and the MeV receptors. Moreover, entry inhibitors targeting attachment or fusion can be readily screened using this assay. Finally, this assay can be easily adopted to study the entry of other members of the Paramyxoviridae, as we have demonstrated for the henipaviruses.
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23
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Cox RM, Plemper RK. Design and Execution of In Vitro Polymerase Assays for Measles Virus and Related Mononegaviruses. Methods Mol Biol 2024; 2808:19-33. [PMID: 38743360 DOI: 10.1007/978-1-0716-3870-5_3] [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] [Indexed: 05/16/2024]
Abstract
Morbilliviruses such as measles virus (MeV) are responsible for major morbidity and mortality worldwide, despite the availability of an effective vaccine and global vaccination campaigns. MeV belongs to the mononegavirus order of viral pathogens that store their genetic information in non-segmented negative polarity RNA genomes. Genome replication and viral gene expression are carried out by a virus-encoded RNA-dependent RNA polymerase (RdRP) complex that has no immediate host cell analog. To better understand the organization and regulation of the viral RdRP and mechanistically characterize antiviral candidates, biochemical RdRP assays have been developed that employ purified recombinant polymerase complexes and synthetic RNA templates to monitor the initiation of RNA synthesis and RNA elongation in vitro. In this article, we will discuss strategies for the efficient expression and preparation of mononegavirus polymerase complexes, provide detailed protocols for the execution and optimization of RdRP assays, evaluate alternative options for the choice of template and detection system, and describe the application of the assay for the characterization of inhibitor candidates. Although MeV RdRP assays are the focus of this article, the general strategies and experimental approaches are readily transferable to related viruses in the mononegavirus order.
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Affiliation(s)
- Robert M Cox
- Center for Translational Antiviral Research, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Richard K Plemper
- Center for Translational Antiviral Research, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA.
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24
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Casasnovas JM. Virus-Receptor Interactions and Receptor-Mediated Virus Entry into Host Cells. Subcell Biochem 2024; 105:533-566. [PMID: 39738957 DOI: 10.1007/978-3-031-65187-8_15] [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] [Indexed: 01/02/2025]
Abstract
The virus particles described in the previous chapters of this book are vehicles that transmit the viral genome and the infection from cell to cell. To initiate the infective cycle, the viral genome must therefore translocate from the viral particle to the cell cytoplasm. Via distinct proteins or motifs in their outermost shell, the particles of animal viruses or bacteriophages attach initially to specific receptors on the host cell surface. These viral receptors thus mediate penetration of the viral genome inside the cell, where the intracellular infective cycle starts. The presence of these receptors on the cell surface is a principal determinant of virus-host tropism. Viruses can use diverse types of molecules to attach to and enter into cells. In addition, virus-receptor recognition can evolve over the course of an infection, and viral variants with distinct receptor-binding specificities and tropism can appear. The identification of viral receptors and the characterization of virus-receptor interactions have been major research goals in virology. In this chapter, we will describe, from a structural perspective, several virus-receptor interactions and the active role of receptor molecules in virus cell entry.
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Affiliation(s)
- José M Casasnovas
- Department of Macromolecular Structure, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain.
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25
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Gonzales-Viera O, Goldstein T, Duignan P, Eiamcharoen P, Keel MK. California sea lion ( Zalophus californianus) lymph-node explant reveals involvement and possible transcriptional regulation of SLAM and nectin-4 during phocine distemper virus infection. Vet Pathol 2024; 61:125-134. [PMID: 37458158 DOI: 10.1177/03009858231186189] [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] [Indexed: 07/18/2023]
Abstract
Phocine distemper virus (PDV) is a significant cause of mortality for phocid seals; however, the susceptibility of otariids to this virus is poorly understood. The authors used a lymph-node explant culture system from California sea lions (Zalophus californianus, CSL) to investigate: (1) the role of signaling lymphocyte activation molecule (SLAM) and nectin-4 in PDV infection and their cellular expression patterns, (2) if PDV induces transcriptional regulation of cell-entry receptors, and (3) the involvement of apoptosis in PDV infection. PDV replicated in the lymph-node explants with peak replication 3 days post-infection (dpi), but the replication was not sustained 4 to 5 dpi. The PDV+ cells co-localized SLAM and nectin-4. These cells expressed IBA1, indicating a histiocytic lineage. Comparison of receptor expression between infected and mock-infected lymph nodes suggested transcriptional downregulation of both receptors during the initial stage of infection and upregulation during the late stage of infection, but the values lack of statistical significance. Cleaved caspase-3+ cells were slightly increased in the infected lymph nodes compared with the mock-infected lymph node from 1 to 4 dpi, but without statistical significance, and a few apoptotic cells co-expressed PDV. The results suggest that lymph-node explants might be an important model to study PDV pathogenesis. CSLs have the potential to be infected with PDV, as they express both cell-entry receptors in histiocytes. The lack of statistical significance in the PDV replication, transcriptional regulation of viral receptors, and changes in apoptosis suggest that although CSL might be infected by PDV, they might be less susceptible than phocid species.
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26
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Siering O, Sawatsky B, Pfaller CK. Canine Distemper Virus Pathogenesis in the Ferret Model. Methods Mol Biol 2024; 2808:197-208. [PMID: 38743372 DOI: 10.1007/978-1-0716-3870-5_15] [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] [Indexed: 05/16/2024]
Abstract
Canine distemper virus (CDV) is a highly contagious pathogen within the morbillivirus genus infecting a wide range of different carnivore species. The virus shares most biological features with other closely related morbilliviruses, including clinical signs, tissue tropism, and replication cycle in the respective host organisms.In the laboratory environment, experimental infections of ferrets with CDV were established as a potent surrogate model for the analysis of several aspects of the biology of the human morbillivirus, measles virus (MeV). The animals are naturally susceptible to CDV and display severe clinical signs resembling the disease seen in patients infected with MeV. As seen with MeV, CDV infects immune cells and is thus associated with a strong transient immunosuppression. Here we describe several methods to evaluate viral load and parameters of immunosuppression in blood-circulating immune cells isolated from CDV-infected animals.
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Affiliation(s)
- Oliver Siering
- Division of Veterinary Medicine, Paul-Ehrlich-Institute, Langen, Germany
| | - Bevan Sawatsky
- Division of Veterinary Medicine, Paul-Ehrlich-Institute, Langen, Germany
| | - Christian K Pfaller
- Division of Veterinary Medicine, Paul-Ehrlich-Institute, Langen, Germany.
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN, USA.
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27
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Kaufman JW, Singh BK, Durnell LA, Sinn PL. Representative measles virus infection requires appropriate airway epithelia culture conditions. J Virol 2023; 97:e0105123. [PMID: 37732787 PMCID: PMC10617594 DOI: 10.1128/jvi.01051-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 07/23/2023] [Indexed: 09/22/2023] Open
Abstract
IMPORTANCE For many years, measles virus (MeV) was assumed to first enter the host via the apical surface of airway epithelial cells and subsequently spread systemically. We and others reported that MeV has an overwhelming preference for entry at the basolateral surface of airway epithelial cells, which led to a fundamental new understanding of how MeV enters a human host. This unexpected observation using well-differentiated primary cultures of airway epithelia from human donors contradicted previous studies using immortalized cultured cells. Here, we show that appropriate differentiation and cell morphology of primary human airway epithelial cells are critical to recapitulate MeV infection patterns and pathogenesis of the in vivo airways. By simply culturing primary cells in media containing serum or passaging primary cultures, erroneous results quickly emerge. These results have broad implications for data interpretation related to respiratory virus infection, spread, and release from human airway epithelial cells.
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Affiliation(s)
- Justin W. Kaufman
- Stead Family Department of Pediatrics, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
| | - Brajesh K. Singh
- Stead Family Department of Pediatrics, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
| | - Lorellin A. Durnell
- Department of Microbiology and Immunology, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
| | - Patrick L. Sinn
- Stead Family Department of Pediatrics, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
- Department of Microbiology and Immunology, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
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28
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Tashiro K, Segawa T, Futami T, Suzuki M, Itou T. Establishment and characterization of a novel kidney cell line derived from the common bottlenose dolphin. In Vitro Cell Dev Biol Anim 2023; 59:536-549. [PMID: 37524977 DOI: 10.1007/s11626-023-00786-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 06/16/2023] [Indexed: 08/02/2023]
Abstract
Common bottlenose dolphin (Tursiops truncatus) is a well-known cetacean species that inhabits temperate and tropical seas worldwide. Limited supply and poor quality of samples hinder the investigation of the effects of various pathogens and environmental pollutants on this cetacean species. Cultured cells are useful for experimental studies; however, no cell lines derived from cetaceans are generally available. Therefore, in this study, we established a novel kidney cell line, TK-ST, derived from T. truncatus. Primary cells exhibited the morphological characteristics of epithelial and fibroblast cells, but their immortalization and passaging resulted in a predominantly epithelial cell morphology. TK-ST was immortalized using the large T SV40 antigen and human telomerase reverse transcriptase and exhibited long-term stable cell growth. TK-ST cells are generally cultured in Dulbecco's modified Eagle's medium with 10% fetal bovine serum at 37°C and 5% CO2 but can also be cultured in 5-20% fetal bovine serum and several other classical media commonly used for common animal cell culture. TK-ST cells were found to be susceptible to several viruses, including the dolphin morbillivirus (most important virus in cetaceans), and exhibited cytopathic effects, facilitating the replication of the dolphin morbillivirus. Furthermore, mRNA expression levels of cytokine genes were increased in TK-ST cells after stimulation with lipopolysaccharides and poly(I:C). Therefore, the novel TK-ST cell line derived in this study can potentially be used for further in vitro studies on cetaceans.
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Affiliation(s)
- Kaede Tashiro
- Nihon University Veterinary Research Center, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan
| | - Takao Segawa
- Nihon University Veterinary Research Center, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan
| | - Taketo Futami
- Minamichita Beachland Aquarium, 428-1 Okuda Mihama, Chita, Aichi, 470-3233, Japan
| | - Miwa Suzuki
- Department of Marine Science, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan
| | - Takuya Itou
- Nihon University Veterinary Research Center, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan.
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29
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Libbey JE, Fujinami RS. Morbillivirus: A highly adaptable viral genus. Heliyon 2023; 9:e18095. [PMID: 37483821 PMCID: PMC10362132 DOI: 10.1016/j.heliyon.2023.e18095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/26/2023] [Accepted: 07/06/2023] [Indexed: 07/25/2023] Open
Abstract
Over the course of human history, numerous diseases have been caused by the transmission of viruses from an animal reservoir into the human population. The viruses of the genus Morbillivirus are human and animal pathogens that emerged from a primordial ancestor a millennia ago and have been transmitting to new hosts, adapting, and evolving ever since. Through interaction with susceptible individuals, as yet undiscovered morbilliviruses or existing morbilliviruses in animal hosts could cause future zoonotic diseases in humans.
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30
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Tosheva II, Saygan KS, Mijnhardt SM, Russell CJ, Fraaij PLA, Herfst S. Hemagglutinin stability as a key determinant of influenza A virus transmission via air. Curr Opin Virol 2023; 61:101335. [PMID: 37307646 DOI: 10.1016/j.coviro.2023.101335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/12/2023] [Accepted: 05/14/2023] [Indexed: 06/14/2023]
Abstract
To cause pandemics, zoonotic respiratory viruses need to adapt to replication in and spread between humans, either via (indirect or direct) contact or through the air via droplets and aerosols. To render influenza A viruses transmissible via air, three phenotypic viral properties must change, of which receptor-binding specificity and polymerase activity have been well studied. However, the third adaptive property, hemagglutinin (HA) acid stability, is less understood. Recent studies show that there may be a correlation between HA acid stability and virus survival in the air, suggesting that a premature conformational change of HA, triggered by low pH in the airways or droplets, may render viruses noninfectious before they can reach a new host. We here summarize available data from (animal) studies on the impact of HA acid stability on airborne transmission and hypothesize that the transmissibility of other respiratory viruses may also be impacted by an acidic environment in the airways.
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Affiliation(s)
- Ilona I Tosheva
- Department of Viroscience, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Kain S Saygan
- Department of Viroscience, Erasmus University Medical Center, Rotterdam, the Netherlands; Pandemic and Disaster Preparedness Center, Delft, Rotterdam, the Netherlands
| | - Suzanne Ma Mijnhardt
- Department of Viroscience, Erasmus University Medical Center, Rotterdam, the Netherlands; Pandemic and Disaster Preparedness Center, Delft, Rotterdam, the Netherlands
| | - Charles J Russell
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Pieter LA Fraaij
- Department of Viroscience, Erasmus University Medical Center, Rotterdam, the Netherlands; Pandemic and Disaster Preparedness Center, Delft, Rotterdam, the Netherlands; Department of Paediatrics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Sander Herfst
- Department of Viroscience, Erasmus University Medical Center, Rotterdam, the Netherlands; Pandemic and Disaster Preparedness Center, Delft, Rotterdam, the Netherlands.
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31
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Ikegame S, Carmichael JC, Wells H, Furler O'Brien RL, Acklin JA, Chiu HP, Oguntuyo KY, Cox RM, Patel AR, Kowdle S, Stevens CS, Eckley M, Zhan S, Lim JK, Veit EC, Evans MJ, Hashiguchi T, Durigon E, Schountz T, Epstein JH, Plemper RK, Daszak P, Anthony SJ, Lee B. Metagenomics-enabled reverse-genetics assembly and characterization of myotis bat morbillivirus. Nat Microbiol 2023; 8:1108-1122. [PMID: 37142773 PMCID: PMC11089651 DOI: 10.1038/s41564-023-01380-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 04/06/2023] [Indexed: 05/06/2023]
Abstract
Morbilliviruses are among the most contagious viral pathogens of mammals. Although previous metagenomic surveys have identified morbillivirus sequences in bats, full-length morbilliviruses from bats are limited. Here we characterize the myotis bat morbillivirus (MBaMV) from a bat surveillance programme in Brazil, whose full genome was recently published. We demonstrate that the fusion and receptor binding protein of MBaMV utilize bat CD150 and not human CD150, as an entry receptor in a mammalian cell line. Using reverse genetics, we produced a clone of MBaMV that infected Vero cells expressing bat CD150. Electron microscopy of MBaMV-infected cells revealed budding of pleomorphic virions, a characteristic morbillivirus feature. MBaMV replication reached 103-105 plaque-forming units ml-1 in human epithelial cell lines and was dependent on nectin-4. Infection of human macrophages also occurred, albeit 2-10-fold less efficiently than measles virus. Importantly, MBaMV is restricted by cross-neutralizing human sera elicited by measles, mumps and rubella vaccination and is inhibited by orally bioavailable polymerase inhibitors in vitro. MBaMV-encoded P/V genes did not antagonize human interferon induction. Finally, we show that MBaMV does not cause disease in Jamaican fruit bats. We conclude that, while zoonotic spillover into humans may theoretically be plausible, MBaMV replication would probably be controlled by the human immune system.
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Affiliation(s)
- Satoshi Ikegame
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jillian C Carmichael
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Heather Wells
- Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY, USA
| | - Robert L Furler O'Brien
- Department of Medicine, Division of Infectious Diseases, Weill Cornell Medicine, New York, NY, USA
| | - Joshua A Acklin
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Hsin-Ping Chiu
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Robert M Cox
- Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Aum R Patel
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Shreyas Kowdle
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Christian S Stevens
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Miles Eckley
- Center for Vector-borne Infectious Diseases Department of Microbiology, Immunology and Pathology College of Veterinary Medicine Colorado State University, Fort Collins, CO, USA
| | - Shijun Zhan
- Center for Vector-borne Infectious Diseases Department of Microbiology, Immunology and Pathology College of Veterinary Medicine Colorado State University, Fort Collins, CO, USA
| | - Jean K Lim
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ethan C Veit
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Matthew J Evans
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Takao Hashiguchi
- Laboratory of Medical Virology, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Edison Durigon
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Tony Schountz
- Center for Vector-borne Infectious Diseases Department of Microbiology, Immunology and Pathology College of Veterinary Medicine Colorado State University, Fort Collins, CO, USA
| | | | - Richard K Plemper
- Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | | | - Simon J Anthony
- Department of Pathology, Microbiology, and Immunology, UC Davis School of Veterinary Medicine, Davis, CA, USA
| | - Benhur Lee
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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32
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Liu CH, Tai CJ, Kuo YT, Chang SS, Lin LT. Combination of Oncolytic Measles Virus and Ursolic Acid Synergistically Induces Oncolysis of Hepatocellular Carcinoma Cells. Viruses 2023; 15:1294. [PMID: 37376594 DOI: 10.3390/v15061294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/22/2023] [Accepted: 05/28/2023] [Indexed: 06/29/2023] Open
Abstract
Hepatocellular carcinoma (HCC) remains a difficult-to-treat cancer due to late diagnosis and limited curative treatment options. Developing more effective therapeutic strategies is essential for the management of HCC. Oncolytic virotherapy is a novel treatment modality for cancers, and its combination with small molecules merits further exploration. In this study, we combined oncolytic measles virus (MV) with the natural triterpenoid compound ursolic acid (UA) and evaluated their combination effect against HCC cells, including those harboring hepatitis B virus (HBV) or hepatitis C virus (HCV) replication. We found that the combination of MV and UA synergistically induced more cell death in Huh-7 HCC cells through enhanced apoptosis. In addition, increased oxidative stress and loss of mitochondrial potential were observed in the treated cells, indicating dysregulation of the mitochondria-dependent pathway. Similar synergistic cytotoxic effects were also found in HCC cells harboring HBV or HCV genomes. These findings underscore the potential of oncolytic MV and UA combination for further development as a treatment strategy for HCC.
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Affiliation(s)
- Ching-Hsuan Liu
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
- Department of Microbiology & Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Chen-Jei Tai
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
- Ph.D. Program in Clinical Drug Development of Herbal Medicine, Taipei Medical University, Taipei 100, Taiwan
| | - Yu-Ting Kuo
- Department of Medical Imaging, Chi Mei Medical Center, Tainan 710, Taiwan
| | - Shen-Shong Chang
- Division of Gastroenterology, Taipei City Hospital Yang-Ming Branch, Taipei 111, Taiwan
- Department of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
- Institute of Public Health, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Liang-Tzung Lin
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
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33
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Takemoto R, Hirai Y, Watanabe S, Harada H, Suzuki T, Hashiguchi T, Yanagi Y, Shirogane Y. Interaction of the Hemagglutinin Stalk Region with Cell Adhesion Molecule (CADM) 1 and CADM2 Mediates the Spread between Neurons and Neuropathogenicity of Measles Virus with a Hyperfusogenic Fusion Protein. J Virol 2023; 97:e0034023. [PMID: 37166307 PMCID: PMC10231178 DOI: 10.1128/jvi.00340-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/19/2023] [Indexed: 05/12/2023] Open
Abstract
Measles virus (MeV), the causative agent of measles, is an enveloped RNA virus of the family Paramyxoviridae, which remains an important cause of childhood morbidity and mortality. MeV has two envelope glycoproteins, the hemagglutinin (H) and fusion (F) proteins. During viral entry or virus-mediated fusion between infected cells and neighboring susceptible cells, the head domain of the H protein initially binds to its receptors, signaling lymphocytic activation molecule family member 1 (SLAM) and nectin-4, and then the stalk region of the H protein transmits the fusion-triggering signal to the F protein. MeV may persist in the human brain and cause a fatal neurodegenerative disease, subacute sclerosing panencephalitis (SSPE). Recently, we showed, using in vitro cell culture, that cell adhesion molecule (CADM) 1 and CADM2 are host factors that trigger hyperfusogenic mutant F proteins, causing cell-to-cell fusion and the transfer of the MeV genome between neurons. Unlike conventional receptors, CADM1 and CADM2 interact in cis (on the same membrane) with the H protein and then trigger membrane fusion. Here, we show that alanine substitutions in part of the stalk region (positions 171-175) abolish the ability of the H protein to mediate membrane fusion triggered by CADM1 and CADM2, but not by SLAM. The recombinant hyperfusogenic MeV carrying this mutant H protein loses its ability to spread in primary mouse neurons as well as its neurovirulence in experimentally infected suckling hamsters. These results indicate that CADM1 and CADM2 are key molecules for MeV propagation in the brain and its neurovirulence in vivo. IMPORTANCE Measles is an acute febrile illness with skin rash. Despite the availability of highly effective vaccines, measles is still an important cause of childhood morbidity and mortality in many countries. The World Health Organization estimates that more than 120,000 people died from measles worldwide in 2021. Measles virus (MeV), the causative agent of measles, can also cause a fatal progressive neurological disorder, subacute sclerosing panencephalitis (SSPE), several years after acute infection. There is currently no effective treatment for this disease. In this study, using recombinant MeVs with altered receptor usage patterns, we show that cell adhesion molecule (CADM) 1 and CADM2 are host factors critical for MeV spread in neurons and its neurovirulence. These findings further our understanding of the molecular mechanism of MeV neuropathogenicity.
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Affiliation(s)
- Ryuichi Takemoto
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuichi Hirai
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Shumpei Watanabe
- Department of Microbiology, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
| | - Hidetaka Harada
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Tateki Suzuki
- Laboratory of Medical Virology, Institute for Life and Medical Sciences, Kyoto University
| | - Takao Hashiguchi
- Laboratory of Medical Virology, Institute for Life and Medical Sciences, Kyoto University
| | - Yusuke Yanagi
- National Research Center for the Control and Prevention of Infectious Diseases, Nagasaki University, Nagasaki, Japan
| | - Yuta Shirogane
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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34
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Guo P, Huang J, Zhu B, Huang AC, Jiang L, Fang J, Moses MA. A rationally designed ICAM1 antibody drug conjugate eradicates late-stage and refractory triple-negative breast tumors in vivo. SCIENCE ADVANCES 2023; 9:eabq7866. [PMID: 37146146 PMCID: PMC10162665 DOI: 10.1126/sciadv.abq7866] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Triple-negative breast cancer (TNBC) remains the most lethal form of breast cancer, and effective targeted therapeutics are in urgent need to improve the poor prognosis of TNBC patients. Here, we report the development of a rationally designed antibody drug conjugate (ADC) for the treatment of late-stage and refractory TNBC. We determined that intercellular adhesion molecule-1 (ICAM1), a cell surface receptor overexpressed in TNBC, efficiently facilitates receptor-mediated antibody internalization. We next constructed a panel of four ICAM1 ADCs using different chemical linkers and warheads and compared their in vitro and in vivo efficacies against multiple human TNBC cell lines and a series of standard, late-stage, and refractory TNBC in vivo models. An ICAM1 antibody conjugated with monomethyl auristatin E (MMAE) via a protease-cleavable valine-citrulline linker was identified as the optimal ADC formulation owing to its outstanding efficacy and safety, representing an effective ADC candidate for TNBC therapy.
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Affiliation(s)
- Peng Guo
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
- Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, China
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Jing Huang
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Bing Zhu
- Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, China
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | | | - Lingxiao Jiang
- School of Life Science and Technology, Tongji University, Shanghai 200092, China
| | - Jianmin Fang
- School of Life Science and Technology, Tongji University, Shanghai 200092, China
| | - Marsha A Moses
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 02115, USA
- Department of Surgery, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
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35
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Structure and supramolecular organization of the canine distemper virus attachment glycoprotein. Proc Natl Acad Sci U S A 2023; 120:e2208866120. [PMID: 36716368 PMCID: PMC9963377 DOI: 10.1073/pnas.2208866120] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Canine distemper virus (CDV) is an enveloped RNA morbillivirus that triggers respiratory, enteric, and high incidence of severe neurological disorders. CDV induces devastating outbreaks in wild and endangered animals as well as in domestic dogs in countries associated with suboptimal vaccination programs. The receptor-binding tetrameric attachment (H)-protein is part of the morbilliviral cell entry machinery. Here, we present the cryo-electron microscopy (cryo-EM) structure and supramolecular organization of the tetrameric CDV H-protein ectodomain. The structure reveals that the morbilliviral H-protein is composed of three main domains: stalk, neck, and heads. The most unexpected feature was the inherent asymmetric architecture of the CDV H-tetramer being shaped by the neck, which folds into an almost 90° bent conformation with respect to the stalk. Consequently, two non-contacting receptor-binding H-head dimers, which are also tilted toward each other, are located on one side of an intertwined four helical bundle stalk domain. Positioning of the four protomer polypeptide chains within the neck domain is guided by a glycine residue (G158), which forms a hinge point exclusively in two protomer polypeptide chains. Molecular dynamics simulations validated the stability of the asymmetric structure under near physiological conditions and molecular docking showed that two receptor-binding sites are fully accessible. Thus, this spatial organization of the CDV H-tetramer would allow for concomitant protein interactions with the stalk and head domains without steric clashes. In summary, the structure of the CDV H-protein ectodomain provides new insights into the morbilliviral cell entry system and offers a blueprint for next-generation structure-based antiviral drug discovery.
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36
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Haas GD, Lee B. Paramyxoviruses from bats: changes in receptor specificity and their role in host adaptation. Curr Opin Virol 2023; 58:101292. [PMID: 36508860 PMCID: PMC9974588 DOI: 10.1016/j.coviro.2022.101292] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022]
Abstract
Global metagenomic surveys have revealed that bats host a diverse array of paramyxoviruses, including species from at least five major genera. An essential determinant of successful spillover is the entry of a virus into a new host. We evaluate the role of receptor usage in the zoonotic potential of bat-borne henipaviruses, morbilliviruses, pararubulaviruses, orthorubulaviruses, and jeilongviruses; successful spillover into humans depends upon compatibility of a respective viral attachment protein with its cognate receptor. We also emphasize the importance of postentry restrictions in preventing spillover. Metagenomics and characterization of newly identified paramyxoviruses have greatly improved our understanding of spillover determinants, allowing for better forecasts of which bat-borne viruses may pose the greatest risk for cross-species transmission into humans.
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Affiliation(s)
- Griffin D Haas
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029 USA
| | - Benhur Lee
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029 USA.
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37
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Ferren M, Lalande A, Iampietro M, Canus L, Decimo D, Gerlier D, Porotto M, Mathieu C. Early Permissiveness of Central Nervous System Cells to Measles Virus Infection Is Determined by Hyperfusogenicity and Interferon Pressure. Viruses 2023; 15:229. [PMID: 36680268 PMCID: PMC9861295 DOI: 10.3390/v15010229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
The cessation of measles virus (MeV) vaccination in more than 40 countries as a consequence of the COVID-19 pandemic is expected to significantly increase deaths due to measles. MeV can infect the central nervous system (CNS) and lead to lethal encephalitis. Substantial part of virus sequences recovered from patients' brain were mutated in the matrix and/or the fusion protein (F). Mutations of the heptad repeat domain located in the C terminal (HRC) part of the F protein were often observed and were associated to hyperfusogenicity. These mutations promote brain invasion as a hallmark of neuroadaptation. Wild-type F allows entry into the brain, followed by limited spreading compared with the massive invasion observed for hyperfusogenic MeV. Taking advantage of our ex vivo models of hamster organotypic brain cultures, we investigated how the hyperfusogenic mutations in the F HRC domain modulate virus distribution in CNS cells. In this study, we also identified the dependence of neural cells susceptibility on both their activation state and destabilization of the virus F protein. Type I interferon (IFN-I) impaired mainly astrocytes and microglial cells permissiveness contrarily to neurons, opening a new way of consideration on the development of treatments against viral encephalitis.
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Affiliation(s)
- Marion Ferren
- CIRI, Centre International de Recherche en Infectiologie, Team Neuro-Invasion, TROpism and VIRal Encephalitis, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Alexandre Lalande
- CIRI, Centre International de Recherche en Infectiologie, Team Neuro-Invasion, TROpism and VIRal Encephalitis, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Mathieu Iampietro
- CIRI, Centre International de Recherche en Infectiologie, Team Immunobiology of the Viral infections, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Lola Canus
- CIRI, Centre International de Recherche en Infectiologie, Team Neuro-Invasion, TROpism and VIRal Encephalitis, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Didier Decimo
- CIRI, Centre International de Recherche en Infectiologie, Team Neuro-Invasion, TROpism and VIRal Encephalitis, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Denis Gerlier
- CIRI, Centre International de Recherche en Infectiologie, Team Neuro-Invasion, TROpism and VIRal Encephalitis, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Matteo Porotto
- Center for Host-Pathogen Interaction, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli,” 81100 Caserta, Italy
| | - Cyrille Mathieu
- CIRI, Centre International de Recherche en Infectiologie, Team Neuro-Invasion, TROpism and VIRal Encephalitis, Université de Lyon, Inserm, U1111, CNRS, UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
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38
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Shirogane Y. [RNA Virus Pathogenicity, Evolution, and Intrapopulation Interaction]. Uirusu 2023; 73:95-104. [PMID: 39343534 DOI: 10.2222/jsv.73.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Measles virus (MeV), the causative agent of measles, can persist in the brain and cause a fatal neurodegenerative disease, subacute sclerosing panencephalitis (SSPE). Because wild-type MeV is not neurotropic, the virus is thought to evolve and acquire neuropathogenicity to cause SSPE. Our recent studies have shown that MeV acquires hyperfusogenic mutations in the fusion (F) gene that confer the ability to use cell adhesion molecule 1 (CADM1) and CADM2 as cis-acting receptor mimicking molecules and allow MeV to spread in neurons. Furthermore, under these conditions, multiple MeV genomes, rather than a single one, are likely to be transmitted transsynaptically between neurons through cell-cell fusion. Therefore, F proteins encoded by different genomes are co-expressed in infected cells, and positive and negative functional interactions between them can occur. These interactions determine the ability of the virus to spread in neurons as a population. In this article, we describe our studies to understand the mechanism by which MeV acquires neuropathogenicity in SSPE.
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Affiliation(s)
- Yuta Shirogane
- Department of Virology, Faculty of Medicine, Kyushu University
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39
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Detection and Molecular Characterization of Canine Distemper Virus in Wildlife from Northern Italy. Pathogens 2022; 11:pathogens11121557. [PMID: 36558891 PMCID: PMC9782791 DOI: 10.3390/pathogens11121557] [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: 10/19/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
Canine distemper virus (CDV) is a fatal, highly contagious disease found in wild and domestic carnivores. Several outbreaks have occurred in wildlife in Italy in recent years. This study aims to detect CDV in wildlife following the increasing mortality of foxes (Vulpes vulpes) in the Emilia-Romagna region (northern Italy) observed in 2021. Sixty-seven foxes and one badger (Meles meles) were subjected to necropsy followed by histological examination and were analyzed with molecular techniques to detect the presence of CDV. Of the tested animals, 16% (nine foxes and one badger) were positive for CDV. Phylogenetic analysis showed two different lineages based on complete H gene sequences. The Europe/South America-1 lineage was detected in one fox from Modena, which resembled the CDV variant associated with a previous outbreak in northern Italy in 2018, while the European Wildlife lineage was detected in animals from the Rimini province. Amino acid analysis highlighted a Y549H mutation in all sequences collected, which is commonly associated with increased virulence.
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40
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Diwan MN, Samad S, Mushtaq R, Aamir A, Allahuddin Z, Ullah I, Ullah Afridi R, Ambreen A, Khan A, Ehsan N, Ehsan Khattak Z, Ventriglio A, De Berardis D. Measles Induced Encephalitis: Recent Interventions to Overcome the Obstacles Encountered in the Management Amidst the COVID-19 Pandemic. Diseases 2022; 10:104. [PMID: 36412598 PMCID: PMC9680274 DOI: 10.3390/diseases10040104] [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: 05/29/2022] [Revised: 09/14/2022] [Accepted: 11/11/2022] [Indexed: 11/18/2022] Open
Abstract
Encephalitis, a well-known complication of measles, is inflammation of the brain parenchyma which is mostly due to the viral invasion of neurons. It presents with a variety of symptoms ranging from mild to severe depending on the extent of the damaged neurons. The diagnosis is based on clinical symptoms such as fever, headache, altered level of consciousness, focal neurological deficits, etc. A detailed history and physical examination facilitate the diagnosis. Investigations include blood tests for measles-specific antibodies, CT, MRI, and analysis of the CSF. The management of measles-induced encephalitis mainly revolves around prevention against contracting the disease and providing supportive care if acquired. The administration of the measles vaccine is the major means of preventing this disease in childhood. Two doses are required to achieve sufficient immunity against measles, the first at the age of 12-15 months and the second at 4-6 years of age. Supportive care includes administering acetaminophen for fever, oral rehydrating salt (ORS) for diarrhea and vomiting, antibiotics for otitis media and pneumonia, and using anti-epileptics such as sodium valproate for seizures. Vitamin A can be given to prevent severe effects in children. The specific treatment would depend on the type of encephalitis the patient has developed.
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Affiliation(s)
| | - Saba Samad
- Dow Medical College, Karachi 75700, Pakistan
| | | | | | | | - Irfan Ullah
- Department of Pediatrics, Naseer Teaching Hospital, Peshawar 25120, Pakistan
- Kabir Medical College, Gandhara University, Peshawar 25120, Pakistan
| | - Rifayat Ullah Afridi
- Department of Pediatrics, Naseer Teaching Hospital, Peshawar 25120, Pakistan
- Kabir Medical College, Gandhara University, Peshawar 25120, Pakistan
| | - Aneela Ambreen
- Department of Pediatrics, Naseer Teaching Hospital, Peshawar 25120, Pakistan
- Kabir Medical College, Gandhara University, Peshawar 25120, Pakistan
| | - Adel Khan
- Khyber Medical College, Peshawar 25120, Pakistan
| | - Nimra Ehsan
- Khyber Medical College, Peshawar 25120, Pakistan
| | | | | | - Domenico De Berardis
- Department of Psychiatry, Azienda Sanitaria Locale 4, 64100 Teramo, Italy
- School of Nursing, University of L’Aquila, 67100 L’Aquila, Italy
- International Centre for Education and Research in Neuropsychiatry, Samara State Medical University, 443100 Samara, Russia
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41
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FeMV is a cathepsin-dependent unique morbillivirus infecting the kidneys of domestic cats. Proc Natl Acad Sci U S A 2022; 119:e2209405119. [PMID: 36251995 PMCID: PMC9618091 DOI: 10.1073/pnas.2209405119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Feline morbillivirus (FeMV) is a recently discovered pathogen of domestic cats and has been classified as a morbillivirus in the Paramyxovirus family. We determined the complete sequence of FeMVUS5 directly from an FeMV-positive urine sample without virus isolation or cell passage. Sequence analysis of the viral genome revealed potential divergence from characteristics of archetypal morbilliviruses. First, the virus lacks the canonical polybasic furin cleavage signal in the fusion (F) glycoprotein. Second, conserved amino acids in the hemagglutinin (H) glycoprotein used by all other morbilliviruses for binding and/or fusion activation with the cellular receptor CD150 (signaling lymphocyte activation molecule [SLAM]/F1) are absent. We show that, despite this sequence divergence, FeMV H glycoprotein uses feline CD150 as a receptor and cannot use human CD150. We demonstrate that the protease responsible for cleaving the FeMV F glycoprotein is a cathepsin, making FeMV a unique morbillivirus and more similar to the closely related zoonotic Nipah and Hendra viruses. We developed a reverse genetics system for FeMVUS5 and generated recombinant viruses expressing Venus fluorescent protein from an additional transcription unit located either between the phospho-protein (P) and matrix (M) genes or the H and large (L) genes of the genome. We used these recombinant FeMVs to establish a natural infection and demonstrate that FeMV causes an acute morbillivirus-like disease in the cat. Virus was shed in the urine and detectable in the kidneys at later time points. This opens the door for long-term studies to address the postulated role of this morbillivirus in the development of chronic kidney disease.
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Mudd GE, Scott H, Chen L, van Rietschoten K, Ivanova-Berndt G, Dzionek K, Brown A, Watcham S, White L, Park PU, Jeffrey P, Rigby M, Beswick P. Discovery of BT8009: A Nectin-4 Targeting Bicycle Toxin Conjugate for the Treatment of Cancer. J Med Chem 2022; 65:14337-14347. [PMID: 36204777 PMCID: PMC9661471 DOI: 10.1021/acs.jmedchem.2c00065] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
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Bicycle toxin conjugates
(BTCs) are a promising new class
of molecules
for targeted delivery of toxin payloads into tumors. Herein we describe
the discovery of BT8009, a Nectin-4 targeting BTC currently under
clinical evaluation. Nectin-4 is overexpressed in multiple tumor types
and is a clinically validated target for selective delivery of cytotoxic
payloads. A Nectin-4 targeting bicyclic peptide was identified by
phage display, which showed highly selective binding for Nectin-4
but suffered from low plasma stability and poor physicochemical properties.
Multiparameter chemical optimization involving introduction of non-natural
amino acids resulted in a lead Bicycle that demonstrated high affinity
for Nectin-4, good stability in biological matrices, and a much-improved
physicochemical profile. The optimized Bicycle was conjugated to the
cytotoxin Monomethyl auristatin E via a cleavable linker to give the
targeted drug conjugate BT8009, which demonstrates potent anticancer
activity in in vivo rodent models.
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Affiliation(s)
- Gemma E Mudd
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Heather Scott
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Liuhong Chen
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | | | | | - Katarzyna Dzionek
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Amy Brown
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Sophie Watcham
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Lewi White
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Peter U Park
- Bicycle Therapeutics, Inc., 4 Hartwell Place, Lexington 02421-3122, Massachusetts, United States
| | - Phil Jeffrey
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Mike Rigby
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Paul Beswick
- BicycleTx Limited, B900 Babraham Research Campus, Cambridge CB22 3AT, U.K
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43
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Sharp B, Rallabandi R, Devaux P. Advances in RNA Viral Vector Technology to Reprogram Somatic Cells: The Paramyxovirus Wave. Mol Diagn Ther 2022; 26:353-367. [PMID: 35763161 DOI: 10.1007/s40291-022-00599-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2022] [Indexed: 11/24/2022]
Abstract
Ethical issues are a significant barrier to the use of embryonic stem cells in patients due to their origin: human embryos. To further the development of stem cells in a patient application, alternative sources of cells were sought. A process referred to as reprogramming was established to create induced pluripotent stem cells from somatic cells, resolving the ethical issues, and vectors were developed to deliver the reprogramming factors to generate induced pluripotent stem cells. Early viral vectors used integrating retroviruses and lentiviruses as delivery vehicles for the transcription factors required to initiate reprogramming. However, because of the inherent risk associated with vectors that integrate into the host genome, non-integrating approaches were explored. The development of non-integrating viral vectors offers a safer alternative, and these modern vectors are reliable, efficient, and easy to use to achieve induced pluripotent stem cells suitable for direct patient application in the growing field of individualized medicine. This review summarizes all the RNA viral vectors in the field of reprogramming with a special focus on the emerging delivery vectors based on non-integrating Paramyxoviruses, Sendai and measles viruses. We discuss their design and evolution towards being safe and efficient reprogramming vectors in generating induced pluripotent stem cells from somatic cells.
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Affiliation(s)
- Brenna Sharp
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN, 55905, USA
| | - Ramya Rallabandi
- Virology and Gene Therapy Graduate Program, Mayo Clinic, Rochester, MN, USA.,Regenerative Sciences Program, Mayo Clinic, Rochester, MN, USA
| | - Patricia Devaux
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN, 55905, USA. .,Virology and Gene Therapy Graduate Program, Mayo Clinic, Rochester, MN, USA. .,Regenerative Sciences Program, Mayo Clinic, Rochester, MN, USA.
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Schmitz KS, Lange MV, Gommers L, Handrejk K, Porter DP, Alabi CA, Moscona A, Porotto M, de Vries RD, de Swart RL. Repurposing an In Vitro Measles Virus Dissemination Assay for Screening of Antiviral Compounds. Viruses 2022; 14:v14061186. [PMID: 35746658 PMCID: PMC9230603 DOI: 10.3390/v14061186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/25/2022] [Accepted: 05/25/2022] [Indexed: 02/04/2023] Open
Abstract
Measles virus (MV) is a highly contagious respiratory virus responsible for outbreaks associated with significant morbidity and mortality among children and young adults. Although safe and effective measles vaccines are available, the COVID-19 pandemic has resulted in vaccination coverage gaps that may lead to the resurgence of measles when restrictions are lifted. This puts individuals who cannot be vaccinated, such as young infants and immunocompromised individuals, at risk. Therapeutic interventions are complicated by the long incubation time of measles, resulting in a narrow treatment window. At present, the only available WHO-advised option is treatment with intravenous immunoglobulins, although this is not approved as standard of care. Antivirals against measles may contribute to intervention strategies to limit the impact of future outbreaks. Here, we review previously described antivirals and antiviral assays, evaluate the antiviral efficacy of a number of compounds to inhibit MV dissemination in vitro, and discuss potential application in specific target populations. We conclude that broadly reactive antivirals could strengthen existing intervention strategies to limit the impact of measles outbreaks.
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Affiliation(s)
- Katharina S. Schmitz
- Department of Viroscience, Erasmus MC, 3015 GD Rotterdam, The Netherlands; (K.S.S.); (M.V.L.); (L.G.); (K.H.); (R.D.d.V.)
| | - Mona V. Lange
- Department of Viroscience, Erasmus MC, 3015 GD Rotterdam, The Netherlands; (K.S.S.); (M.V.L.); (L.G.); (K.H.); (R.D.d.V.)
| | - Lennert Gommers
- Department of Viroscience, Erasmus MC, 3015 GD Rotterdam, The Netherlands; (K.S.S.); (M.V.L.); (L.G.); (K.H.); (R.D.d.V.)
| | - Kim Handrejk
- Department of Viroscience, Erasmus MC, 3015 GD Rotterdam, The Netherlands; (K.S.S.); (M.V.L.); (L.G.); (K.H.); (R.D.d.V.)
| | | | - Christopher A. Alabi
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14850, USA;
| | - Anne Moscona
- Department of Pediatrics, Columbia University Medical Center, New York, NY 10032, USA; (A.M.); (M.P.)
- Center for Host–Pathogen Interaction, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Matteo Porotto
- Department of Pediatrics, Columbia University Medical Center, New York, NY 10032, USA; (A.M.); (M.P.)
- Center for Host–Pathogen Interaction, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, 81100 Caserta, Italy
| | - Rory D. de Vries
- Department of Viroscience, Erasmus MC, 3015 GD Rotterdam, The Netherlands; (K.S.S.); (M.V.L.); (L.G.); (K.H.); (R.D.d.V.)
| | - Rik L. de Swart
- Department of Viroscience, Erasmus MC, 3015 GD Rotterdam, The Netherlands; (K.S.S.); (M.V.L.); (L.G.); (K.H.); (R.D.d.V.)
- Correspondence:
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Rabaan AA, Mutair AA, Alhumaid S, Garout M, Alsubki RA, Alshahrani FS, Alfouzan WA, Alestad JH, Alsaleh AE, Al-Mozaini MA, Koritala T, Alotaibi S, Temsah MH, Akbar A, Ahmad R, Khalid Z, Muhammad J, Ahmed N. Updates on Measles Incidence and Eradication: Emphasis on the Immunological Aspects of Measles Infection. Medicina (B Aires) 2022; 58:medicina58050680. [PMID: 35630096 PMCID: PMC9147347 DOI: 10.3390/medicina58050680] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/15/2022] [Accepted: 05/16/2022] [Indexed: 12/31/2022] Open
Abstract
Measles is an RNA virus infectious disease mainly seen in children. Despite the availability of an effective vaccine against measles, it remains a health issue in children. Although it is a self-limiting disease, it becomes severe in undernourished and immune-compromised individuals. Measles infection is associated with secondary infections by opportunistic bacteria due to the immunosuppressive effects of the measles virus. Recent reports highlight that measles infection erases the already existing immune memory of various pathogens. This review covers the incidence, pathogenesis, measles variants, clinical presentations, secondary infections, elimination of measles virus on a global scale, and especially the immune responses related to measles infection.
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Affiliation(s)
- Ali A. Rabaan
- Molecular Diagnostic Laboratory, Johns Hopkins Aramco Healthcare, Dhahran 31311, Saudi Arabia
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia
- Department of Public Health and Nutrition, The University of Haripur, Haripur 22610, Pakistan
- Correspondence: (A.A.R.); (N.A.)
| | - Abbas Al Mutair
- Research Center, Almoosa Specialist Hospital, Al-Ahsa 36342, Saudi Arabia;
- College of Nursing, Princess Norah Bint Abdulrahman University, Riyadh 11564, Saudi Arabia
- School of Nursing, Wollongong University, Wollongong, NSW 2522, Australia
| | - Saad Alhumaid
- Administration of Pharmaceutical Care, Al-Ahsa Health Cluster, Ministry of Health, Al-Ahsa 31982, Saudi Arabia;
| | - Mohammed Garout
- Department of Community Medicine and Health Care for Pilgrims, Faculty of Medicine, Umm Al-Qura University, Makkah 21955, Saudi Arabia;
| | - Roua A. Alsubki
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11362, Saudi Arabia;
| | - Fatimah S. Alshahrani
- Department of Internal Medicine, College of Medicine, King Saud University, Riyadh 11362, Saudi Arabia;
- Department of Internal Medicine, Division of Infectious Diseases, College of Medicine, King Saud University Medical City, Riyadh 11451, Saudi Arabia
| | - Wadha A. Alfouzan
- Department of Microbiology, Faculty of Medicine, Kuwait University, Safat 13110, Kuwait;
- Microbiology Unit, Department of Laboratories, Farwania Hospital, Farwania 85000, Kuwait
| | - Jeehan H. Alestad
- Immunology and Infectious Microbiology Department, University of Glasgow, Glasgow G1 1XQ, UK;
- Microbiology Department, College of Medicine, Jabriya 46300, Kuwait
| | - Abdullah E. Alsaleh
- Core Laboratory, Johns Hopkins Aramco Healthcare, Dhahran 31311, Saudi Arabia;
| | - Maha A. Al-Mozaini
- Immunocompromised Host Research Section, Department of Infection and Immunity, King Faisal Specialist Hospital and Research Centre, Riyadh 11564, Saudi Arabia;
| | - Thoyaja Koritala
- Division of Hospital Internal Medicine, Mayo Clinic Health System, Mankato, MN 56001, USA;
| | - Sultan Alotaibi
- Molecular Microbiology Department, King Fahad Medical City, Riyadh 11525, Saudi Arabia;
| | - Mohamad-Hani Temsah
- Pediatric Department, College of Medicine, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Ali Akbar
- Department of Microbiology, University of Balochistan, Quetta 87300, Pakistan;
| | - Rafiq Ahmad
- Department of Microbiology, The University of Haripur, Haripur 22610, Pakistan; (R.A.); (Z.K.); (J.M.)
| | - Zainab Khalid
- Department of Microbiology, The University of Haripur, Haripur 22610, Pakistan; (R.A.); (Z.K.); (J.M.)
| | - Javed Muhammad
- Department of Microbiology, The University of Haripur, Haripur 22610, Pakistan; (R.A.); (Z.K.); (J.M.)
| | - Naveed Ahmed
- Department of Medical Microbiology & Parasitology, School of Medical Sciences, University Sains Malaysia, Kota Bharu 16150, Kelantan, Malaysia
- Correspondence: (A.A.R.); (N.A.)
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Novel Roles of the Nipah Virus Attachment Glycoprotein and Its Mobility in Early and Late Membrane Fusion Steps. mBio 2022; 13:e0322221. [PMID: 35506666 PMCID: PMC9239137 DOI: 10.1128/mbio.03222-21] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Paramyxoviridae family comprises important pathogens that include measles (MeV), mumps, parainfluenza, and the emerging deadly zoonotic Nipah virus (NiV) and Hendra virus (HeV). Paramyxoviral entry into cells requires viral-cell membrane fusion, and formation of paramyxoviral pathognomonic syncytia requires cell-cell membrane fusion. Both events are coordinated by intricate interactions between the tetrameric attachment (G/H/HN) and trimeric fusion (F) glycoproteins. We report that receptor binding induces conformational changes in NiV G that expose its stalk domain, which triggers F through a cascade from prefusion to prehairpin intermediate (PHI) to postfusion conformations, executing membrane fusion. To decipher how the NiV G stalk may trigger F, we introduced cysteines along the G stalk to increase tetrameric strength and restrict stalk mobility. While most point mutants displayed near-wild-type levels of cell surface expression and receptor binding, most yielded increased NiV G oligomeric strength, and showed remarkably strong defects in syncytium formation. Furthermore, most of these mutants displayed stronger F/G interactions and significant defects in their ability to trigger F, indicating that NiV G stalk mobility is key to proper F triggering via moderate G/F interactions. Also remarkably, a mutant capable of triggering F and of fusion pore formation yielded little syncytium formation, implicating G or G/F interactions in a late step occurring post fusion pore formation, such as the extensive fusion pore expansion required for syncytium formation. This study uncovers novel mechanisms by which the G stalk and its oligomerization/mobility affect G/F interactions, the triggering of F, and a late fusion pore expansion step-exciting novel findings for paramyxoviral attachment glycoproteins. IMPORTANCE The important Paramyxoviridae family includes measles, mumps, human parainfluenza, and the emerging deadly zoonotic Nipah virus (NiV) and Hendra virus (HeV). The deadly emerging NiV can cause neurologic and respiratory symptoms in humans with a >60% mortality rate. NiV has two surface proteins, the receptor binding protein (G) and fusion (F) glycoproteins. They mediate the required membrane fusion during viral entry into host cells and during syncytium formation, a hallmark of paramyxoviral and NiV infections. We previously discovered that the G stalk domain is important for triggering F (via largely unknown mechanisms) to induce membrane fusion. Here, we uncovered new roles and mechanisms by which the G stalk and its mobility modulate the triggering of F and also unexpectedly affect a very late step in membrane fusion, namely fusion pore expansion. Importantly, these novel findings may extend to other paramyxoviruses, offering new potential targets for therapeutic interventions.
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Sakamoto K, Satoh Y, Takahashi KI, Wakimoto H, Kitagawa Y, Gotoh B, Ayata M, Itoh M. Upregulation of viral RNA polymerase activity promotes adaptation of SSPE virus to neuronal cells. Virology 2022; 573:1-11. [DOI: 10.1016/j.virol.2022.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 05/13/2022] [Accepted: 05/24/2022] [Indexed: 11/26/2022]
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Hashimoto H, Tanaka Y, Murata M, Ito T. Nectin-4: a Novel Therapeutic Target for Skin Cancers. Curr Treat Options Oncol 2022; 23:578-593. [PMID: 35312963 DOI: 10.1007/s11864-022-00940-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2021] [Indexed: 12/19/2022]
Abstract
OPINION STATEMENT Nectin-4 is a tumor-associated antigen that is highly expressed on various cancer cells, and it has been further proposed to have roles in tumor development and propagation ranging from cellular proliferation to motility and invasion. Nectin-4 blockade reduces tumor proliferation and induces apoptosis in several malignancies. Nectin-4 has been used as a potential target in antibody-drug conjugate (ADC) development. Enfortumab vedotin, an ADC against Nectin-4, has demonstrated efficacy against solid tumor malignancies. Enfortumab vedotin has received US Food and Drug Administration approval for treating urothelial cancer. Furthermore, the efficacy of ADCs against Nectin-4 against solid tumors other than urothelial cancer has been demonstrated in preclinical studies, and clinical trials examining the effects of enfortumab vedotin are ongoing. Recently, Nectin-4 was reported to be highly expressed in several skin cancers, including malignant melanoma, cutaneous squamous cell carcinoma, and extramammary Paget's disease, and involved in tumor progression and survival in retrospective studies. Nectin-4-targeted therapies and ADCs against Nectin-4 could therefore be novel therapeutic options for skin cancers. This review highlights current knowledge on Nectin-4 in malignant tumors, the efficacy of enfortumab vedotin in clinical trials, and the prospects of Nectin-4-targeted agents against skin cancers.
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Affiliation(s)
- Hiroki Hashimoto
- Department of Dermatology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Yuka Tanaka
- Department of Dermatology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Maho Murata
- Department of Dermatology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takamichi Ito
- Department of Dermatology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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Shen F, Geng Y, Zhang L, Luo L, Yan G, Hou R, Yue B, Zhang X. Transcriptome Analysis Reveals the Alternative Splicing Changes in the Immune-Related Genes of the Giant Panda (Ailuropoda melanoleuca), in Response to the Canine Distemper Vaccine. Zoolog Sci 2022; 39:275-285. [DOI: 10.2108/zs210078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 01/18/2022] [Indexed: 11/17/2022]
Affiliation(s)
- Fujun Shen
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu 610081, China
| | - Yang Geng
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China
| | - Liang Zhang
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu 610081, China
| | - Li Luo
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu 610081, China
| | - Guoqiang Yan
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China
| | - Rong Hou
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu 610081, China
| | - Bisong Yue
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, College of Life Sciences, Sichuan University, Chengdu 610064, China
| | - Xiuyue Zhang
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China
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Abstract
Canine distemper virus (CDV) is a highly contagious pathogen and is known to enter the host via the respiratory tract and disseminate to various organs. Current hypotheses speculate that CDV uses the homologous cellular receptors of measles virus (MeV), SLAM and nectin-4, to initiate the infection process. For validation, here, we established the well-differentiated air-liquid interface (ALI) culture model from primary canine tracheal airway epithelial cells. By applying the green fluorescent protein (GFP)-expressing CDV vaccine strain and recombinant wild-type viruses, we show that cell-free virus infects the airway epithelium mainly via the paracellular route and only after prior disruption of tight junctions by pretreatment with EGTA; this infection was related to nectin-4 but not to SLAM. Remarkably, when CDV-preinfected DH82 cells were cocultured on the basolateral side of canine ALI cultures grown on filter supports with a 1.0-μm pore size, cell-associated CDV could be transmitted via cell-to-cell contact from immunocytes to airway epithelial cultures. Finally, we observed that canine ALI cultures formed syncytia and started to release cell-free infectious viral particles from the apical surface following treatment with an inhibitor of the JAK/STAT signaling pathway (ruxolitinib). Our findings show that CDV can overcome the epithelial barrier through different strategies, including infection via immunocyte-mediated transmission and direct infection via the paracellular route when tight junctions are disrupted. Our established model can be adapted to other animals for studying the transmission routes and the pathogenicity of other morbilliviruses. IMPORTANCE Canine distemper virus (CDV) is not only an important pathogen of carnivores, but it also serves as a model virus for analyzing measles virus pathogenesis. To get a better picture of the different stages of infection, we used air-liquid interface cultures to analyze the infection of well-differentiated airway epithelial cells by CDV. Applying a coculture approach with DH82 cells, we demonstrated that cell-mediated infection from the basolateral side of well-differentiated epithelial cells is more efficient than infection via cell-free virus. In fact, free virus was unable to infect intact polarized cells. When tight junctions were interrupted by treatment with EGTA, cells became susceptible to infection, with nectin-4 serving as a receptor. Another interesting feature of CDV infection is that infection of well-differentiated airway epithelial cells does not result in virus egress. Cell-free virions are released from the cells only in the presence of an inhibitor of the JAK/STAT signaling pathway. Our results provide new insights into how CDV can overcome the barrier of the airway epithelium and reveal similarities and some dissimilarities compared to measles virus.
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