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Parvate A, Williams EP, Taylor MK, Chu YK, Lanman J, Saphire EO, Jonsson CB. Diverse Morphology and Structural Features of Old and New World Hantaviruses. Viruses 2019; 11:E862. [PMID: 31527500 PMCID: PMC6783877 DOI: 10.3390/v11090862] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/01/2019] [Accepted: 09/12/2019] [Indexed: 02/07/2023] Open
Abstract
To further understanding of the structure and morphology of the Orthohantavirus, family Hantaviridae, we have employed cryo-electron microscopy (cryo-EM) for three New World hantaviruses: Andes (ANDV), Sin Nombre (SNV), and Black Creek Canal (BCCV). Building upon our prior cryo-EM and cryo-tomography study of the Old World hantavirus, Hantaan virus (HTNV), we have expanded our studies to examine the entire virion population present in cell culture supernatant. Hence, in contrast to the prior cryo-EM/ET studies in which we used a polyethylene precipitation, a sucrose gradient, and a sucrose cushion, we used two sucrose cushions. We inactivated the material after the first cushion. We tested the method using HTNV which has a known cryo-EM structure and observed equivalent results. Therefore, we used this method to assess the particle distribution of the New World hantaviruses by cryo-EM. Cryo-EM images showed a diverse range of sizes and morphologies for the New World viruses that we classified as round, tubular, and irregular. Strikingly, BCCV virions were mostly tubular. These first cryo-EM images of the New World Orthohantavirus confirm prior EM observations that noted tubular projections of SNV at the plasma membrane during virion morphogenesis but were not confirmed. These findings underscore the need for further investigation of virion morphogenesis of the Orthohantavirus.
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Affiliation(s)
- Amar Parvate
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47906, USA; (A.P.)
| | - Evan P. Williams
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA, (M.K.T.)
| | - Mariah K. Taylor
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA, (M.K.T.)
| | - Yong-Kyu Chu
- Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville, Louisville, KY 40202, USA;
| | - Jason Lanman
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47906, USA; (A.P.)
| | | | - Colleen B. Jonsson
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA, (M.K.T.)
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Abstract
The Bunyavirales Order encompasses nine families of enveloped viruses containing a single-stranded negative-sense RNA genome divided into three segments. The small (S) and large (L) segments encode proteins participating in genome replication in the infected cell cytoplasm. The middle (M) segment encodes the viral glycoproteins Gn and Gc, which are derived from a precursor polyprotein by host cell proteases. Entry studies are available only for a few viruses in the Order, and in each case they were shown to enter cells via receptor-mediated endocytosis. The acidic endosomal pH triggers the fusion of the viral envelope with the membrane of an endosome. Structural studies on two members of this Order, the phleboviruses and the hantaviruses, have shown that the membrane fusion protein Gc displays a class II fusion protein fold and is homologous to its counterparts in flaviviruses and alphaviruses, which are positive-sense, single-stranded RNA viruses. We analyze here recent data on the structure and function of the structure of the phlebovirus Gc and hantavirus Gn and Gc glycoproteins, and extrapolate common features identified in the amino acid sequences to understand also the structure and function of their counterparts in other families of the Bunyavirales Order. Our analysis also identified clear structural homology between the hantavirus Gn and alphavirus E2 glycoproteins, which make a heterodimer with the corresponding fusion proteins Gc and E1, respectively, revealing that not only the fusion protein has been conserved across viral families.
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Affiliation(s)
- Pablo Guardado-Calvo
- Institut Pasteur, Unité de Virologie Structurale, Paris Cedex 15, France; CNRS UMR 3569 Virologie, Paris Cedex 15, France
| | - Félix A Rey
- Institut Pasteur, Unité de Virologie Structurale, Paris Cedex 15, France; CNRS UMR 3569 Virologie, Paris Cedex 15, France.
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Olal D, Daumke O. Structure of the Hantavirus Nucleoprotein Provides Insights into the Mechanism of RNA Encapsidation. Cell Rep 2016; 14:2092-2099. [PMID: 26923588 DOI: 10.1016/j.celrep.2016.02.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 12/07/2015] [Accepted: 01/25/2016] [Indexed: 11/19/2022] Open
Abstract
Hantaviruses are etiological agents of life-threatening hemorrhagic fever with renal syndrome and hantavirus cardiopulmonary syndrome. The nucleoprotein (N) of hantavirus is essential for viral transcription and replication, thus representing an attractive target for therapeutic intervention. We have determined the crystal structure of hantavirus N to 3.2 Å resolution. The structure reveals a two-lobed, mostly α-helical structure that is distantly related to that of orthobunyavirus Ns. A basic RNA binding pocket is located at the intersection between the two lobes. We provide evidence that oligomerization is mediated by amino- and C-terminal arms that bind to the adjacent monomers. Based on these findings, we suggest a model for the oligomeric ribonucleoprotein (RNP) complex. Our structure provides mechanistic insights into RNA encapsidation in the genus Hantavirus and constitutes a template for drug discovery efforts aimed at combating hantavirus infections.
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Affiliation(s)
- Daniel Olal
- Crystallography, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Strasse 10, 13125 Berlin, Germany.
| | - Oliver Daumke
- Crystallography, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Strasse 10, 13125 Berlin, Germany; Biochemie, Freie Universität Berlin, Takustrasse 6, 14195 Berlin, Germany.
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Xu F, Yang Z, Wang L, Lee YL, Yang CC, Xiao SY, Xiao H, Wen L. Morphological characterization of hantavirus HV114 by electron microscopy. Intervirology 2007; 50:166-72. [PMID: 17259735 DOI: 10.1159/000098959] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2005] [Accepted: 04/11/2005] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE This study was sought to investigate the propagation and morphogenesis of a new strain of hantavirus, HV114. METHODS The urine of patient with epidemic hemorrhagic fever was inoculated to Vero E6 cells for the virus isolation. Electron microscopy was used to observe the isolated virus, HV114 and the variation of infected Vero E6 cells. RESULTS According to our observations, the size (90-120 nm) of HV114 is smaller than that reported previously as 110- 160 nm. While ribosome-like particles associated with virions originating from rodent hantaviruses were not observed in HV114, virion budding was exhibited. It suggests that the dumbbell-shaped particles may generated from the process of virion budding. The budding processes suggest that there are several sites for HV114 assembly and maturation, including the host endoplasmic reticulum-Golgi compartment and the host plasma membranes. CONCLUSIONS The HV114 isolated from the urine of the patient is differed from other hantaviruses which were isolated from rat organs. HV114 might undergo changes during the viral transmission process from rodents to humans.
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Affiliation(s)
- Fangling Xu
- Institute of Virology, Medical College, Wuhan University, Wuhan, Hubei, PR China
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Plekhova NG, Somova-Isachkova LM, Slonova RA, Kompanets GG, Pustovalov EV, Drobot EI. [Mechanism of viral infection of macrophages by an agent of hemorrhagic fever with renal syndrome: ultrastructural aspects]. Tsitologiia 2003; 45:770-9. [PMID: 15216629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Monocytes/macrophages are one of the first cells subjected to the infectious effect of viruses. The present paper analyses for the first time the ultrastructural changes in macrophages caused by an agent of hemorrhagic fever with renal syndrome (HERS)--hantavirus (HV). After a local fusion with the host cell plasmalemma and its adsorption on the cell surface, the HV penetrates through the macrophage membrane. This process occurred without destruction of cell plasmalemma. HV viral particles were observe within the macrophage cytoplasm mostly on the smooth granular endoplasmic reticulum vesicles. Viroplasts were defined in macrophages after a 2 h incubation, with synthesis of viral nucleoproteins and primary covers being observed on the surface of viroplasts. Viral particles left macrophages in the process of budding on the phagocyte surface. Thereby HV, similar to other enveloped viruses, realizes entrance and egress from the target cell without damaging its plasmalemma. This accounts for the viral ability to reproduce in macrophages for a long time without any cytopathological effect. Consequently, in the absence of obvious destruction changes, mononuclear phagocytes can serve as a long-term storage of viruses, and thus being involved in HV dissemination during HERS.
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Affiliation(s)
- N G Plekhova
- Research Institute of Epidemiology and Microbiology, Siberian Branch of RAMS, Vladivostok
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Simmons JH, Riley LK. Hantaviruses: an overview. Comp Med 2002; 52:97-110. [PMID: 12022401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Hantaviruses are a newly emerging group of rodent-borne viruses that have significant zoonotic potential. Human infection by hantaviruses can result in profound morbidity and mortality, with death rates as high as 50%, and potentially long-term cardiovascular consequences. Hantaviruses are carried by peridomestic and wild rodents worldwide and have occasionally been linked to infections in laboratory rodents. Because these viruses have been associated with significant human disease, they have become the subject of intense scientific investigation. In this review the reader is introduced to the hantaviruses, including hantavirus diseases and their pathogenesis. A review of the biology, morphology, and molecular biology of the hantaviruses with a brief overview of the ecology and biology of hantavirus-rodent pairs is also included. The risks of occupational exposure to hantaviruses, diagnosis of hantavirus infections, and methods for handling potentially infected rodents and tissues are discussed as well.
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Affiliation(s)
- Joe H Simmons
- Research Animal Diagnostic Laboratory, Department of Veterinary Pathobiology, Columbia, Missouri 65211, USA
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Affiliation(s)
- C F Spiropoulou
- Special Pathogens Branch, Division for Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd NE Atlanta, GA 30333, USA
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Goldsmith CS, Elliott LH, Peters CJ, Zaki SR. Ultrastructural characteristics of Sin Nombre virus, causative agent of hantavirus pulmonary syndrome. Arch Virol 1995; 140:2107-22. [PMID: 8572935 DOI: 10.1007/bf01323234] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A previously unrecognized disease, hantavirus pulmonary syndrome, was described following an outbreak of severe, often lethal, pulmonary illness in the southwestern United States in May-June, 1993. We have now studied the morphologic features of the causative agent, Sin Nomber virus (SNV), by thin section electron microscopy and immunoelectron microscopy of infected Vero E6 cells. SNV virions were roughly spherical and had a mean diameter of 112 nm. They had a rather dense envelope and closely apposed fine surface projections, 7 nm in length. Filamentous nucleocapsids were present within virions. Viral inclusion bodies were present in the cytoplasm of infected cells; these appeared granular or filamentous, depending on the plane of section. All of these characteristics were similar to published descriptions of other hantaviruses; however, unlike all other hantaviruses and virtually all other member viruses of the family Bunyaviridae which bud upon smooth intracytoplasmic membranes, SNV budding occurred almost entirely upon the plasma membrane of infected cells. Virus budding was associated with the formation of long 28 nm diameter tubular projections. Occasional elongated 47 nm diameter virus-like particles were seen to bud upon intracytoplasmic membranes. As shown by immunoelectron microscopy, viral antigens were localized over virions, inclusions, and tubular projections associated with virion morphogenesis.
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Affiliation(s)
- C S Goldsmith
- Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Elliott LH, Ksiazek TG, Rollin PE, Spiropoulou CF, Morzunov S, Monroe M, Goldsmith CS, Humphrey CD, Zaki SR, Krebs JW. Isolation of the causative agent of hantavirus pulmonary syndrome. Am J Trop Med Hyg 1994; 51:102-8. [PMID: 8059907 DOI: 10.4269/ajtmh.1994.51.102] [Citation(s) in RCA: 118] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Investigation of a recent outbreak of acute respiratory illness in the southwestern United States resulted in the recognition of a new disease, hantavirus pulmonary syndrome (HPS) with high mortality. Different animals and cell lines were used in attempts to isolate the causative agent. A previously unknown hantavirus was passaged in laboratory-bred deer mice, recovered from lung tissues of a deer mouse, Peromyscus maniculatus, and propagated in the E6 clone of Vero cells. Virus antigen was readily detected in the infected cells by an indirect immunofluorescence assay, using convalescent-phase sera from HPS patients. By electron microscopy, the virus was shown to have the typical morphologic features of members of the genus Hantavirus, family Bunyaviridae. Virus sequences corresponded to those previously detected by a nested reverse transcriptase-polymerase chain reaction assay of hantavirus-infected specimens from rodents and humans. This newly recognized virus, the etiologic agent of HPS, has been tentatively named Muerto Canyon virus.
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Affiliation(s)
- L H Elliott
- Special Pathogens Branch, Centers for Disease Control and Prevention, Atlanta, Georgia
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Gligic A, Dimkovic N, Xiao SY, Buckle GJ, Jovanovic D, Velimirovic D, Stojanovic R, Obradovic M, Diglisic G, Micic J. Belgrade Virus: A New Hantavirus Causing Severe Hemorrhagic Fever with Renal Syndrome in Yugoslavia. J Infect Dis 1992; 166:113-20. [PMID: 1351508 DOI: 10.1093/infdis/166.1.113] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Two biologically and genetically distinct hantaviruses were isolated from blood and urine specimens collected from four Yugoslavian patients with clinically severe hemorrhagic fever with renal syndrome (HFRS). Viral isolates from three patients, designated strains Belgrade 1-3, were distinct from Hantaan, Seoul, Puumala, and Prospect Hill viruses as determined by plaque-reduction neutralization tests and restriction analysis of enzymatically amplified M-segment fragments. The fourth isolate, called Kraljevo, was indistinguishable from Hantaan virus. Strains Belgrade 1 and 2, like the Kraljevo strain, caused a fatal meningoencephalitis in newborn mice inoculated with 100 pfu of virus intracerebrally and intraperitoneally. Strain Belgrade 3 was much less neurovirulent, requiring 30,000 pfu of virus to cause fatal disease in mice. These data indicate that two distinct hantaviruses, one of which constitutes a new serotype, cause clinically severe HFRS in Yugoslavia.
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Affiliation(s)
- A Gligic
- Institute of Immunology and Virology, Belgrade, Yugoslavia
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Hung T, Zhou JY, Tang YM, Zhao TX, Baek LJ, Lee HW. Identification of Hantaan virus-related structures in kidneys of cadavers with haemorrhagic fever with renal syndrome. Arch Virol 1992; 122:187-99. [PMID: 1346088 DOI: 10.1007/bf01321127] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The etiologic agent of haemorrhagic fever with renal syndrome (HFRS), Hantaan virus, was first isolated in 1976. Since then numerous Hantaan-like viruses have been isolated and five serotypes of Hantavirus have been recognized. Serological studies indicate that these viruses are globally distributed, with each serotype occurring in specific areas. Hantaan virus has been intensively studied antigenically, biochemically, and genetically. However there is still a paucity of information on the pathogenesis of Hantaan virus in the human host. In this paper, we report the detection by thin section immune electron microscopy of the occurrence of numerous dense precipitates, typical inclusion bodies, a surface antigen layer, as well as Hantaan virion-like structures in the kidneys of patients that died during the acute phase of HFRS. These findings may shed some light on understanding the pathogenesis of HFRS in target organs most affected by the disease, such as the kidneys.
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Affiliation(s)
- T Hung
- Department of Immunology, #4 Medical University of Peoples Liberation Army, Beijing, China
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12
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Abstract
Hemorrhagic fever with renal syndrome (HFRS) virus, strain SR-11 (SR) was inoculated intraperitoneally into specific-pathogen-free (SPF) newborn rats, from which the kidney lesions were examined pathologically. The infected rats revealed proteinuria on and after 16 days postinoculation (PI). Histologically, the epithelial cells of the renal tubules showed mild vacuolar and granular degeneration with cytoplasmic inclusion bodies (CIB) on and after 16 days PI. Ultrastructurally, a decrease in number of mitochondria and endocytic vesicles was recognized in the epithelial cells of the proximal renal tubules. Occasionally, both the proximal and distal renal tubular cells had CIB near well-developed Golgi apparatus on and after 13 days PI. Immunohistochemically, CIB were positive for anti-SR nucleocapsid antibody, but negative for anti-SR envelope protein antibody. From the results obtained here, it was concluded that the proteinuria in rats infected with HFRS virus resulted from an insufficiency of reabsorption in the proximal renal tubules, and that CIB consisted of the viral nucleocapsid protein.
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Affiliation(s)
- K Kobayashi
- Department of Comparative Pathology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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13
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Chen DH. [An electron microscopic study of viral infected peripheral mononuclear cells in epidemic hemorrhagic fever]. Zhonghua Bing Li Xue Za Zhi 1989; 18:194-6. [PMID: 2576865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Ultrathin sections of peripheral blood cells from 7 patients of early stage epidemic hemorrhagic fever (EHF) were reexamined under transmission electron microscope. Virus particles were found in the cytoplasmic vacuoles of mononuclear cells from two patients. The morphology and morphogenesis of the matured virus were identical with those of Hantaan virus of the Bunyaviridae family. Additionally, abnormal aggregations of tubuloreticular structure (TRS) were sometimes encountered in the dilated cisternae of endoplasmic reticulum in the lymphoid cells regardless of whether there are virus particles present in the cytoplasm.
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Abstract
Hemorrhagic fever with renal syndrome is an acute infectious illness characterized by fever, hemorrhage, and renal failure. Research over the last 40 years has led to the discovery and characterization of the causative viruses, detailed knowledge of the epidemiology of the disease, development of sensitive diagnostic assays, and improvements in patient management, which in turn have led to significant reductions in mortality. Considerable progress has also been made in elucidating the pathophysiology of the disease, although much more needs to be learned. Recent data show that hemorrhagic fever with renal syndrome has a wider geographic occurrence than previously thought. This syndrome must be considered in the differential diagnosis of acute renal failure of unknown cause.
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Affiliation(s)
- T M Cosgriff
- U.S. Army Medical Research Institute of Infectious Diseases, Frederick, Maryland
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15
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Xia SM, Ling JP, Chen WK, Wang LH, Liang S, Zhou JY, Chi J, Hong T. [Immunocolloidal gold labelling electron microscopy and its application in studying the morphology of viruses]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1987; 9:50-4. [PMID: 3036385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Chen DH, Yang HB, Wang GH, Chang HQ, Ni DS, He H, Lee YZ, Zhou L. [Electron microscopic study of the morphology of virus of hemorrhagic fever with renal syndrome in suckling mice]. Wei Sheng Wu Xue Bao 1986; 26:112-5. [PMID: 2875562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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17
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Yu CZ. [Morphological study of two strains of hemorrhagic fever renal syndrome virus isolated from patients]. Zhonghua Liu Xing Bing Xue Za Zhi 1985; 6:119-21. [PMID: 2861905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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18
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Hong T, Ye WW, Xia SM, Chu YL, Zhou JY, Zhao TX, Hang CS, Liao HX. [Identification of hemorrhagic fever-renal syndrome virus isolated from different areas in China by immuno-enzyme electron microscopy--morphological study on various virulent strains]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1983; 5:356-60. [PMID: 6233018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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19
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Li ZD. [Isolation of the virus of hemorrhagic fever with renal syndrome (HFRS) from the blood of patients using Vero E-6 cell culture]. Zhonghua Liu Xing Bing Xue Za Zhi 1983; 4:198-201. [PMID: 6416679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Cai BJ. [Morphology of epidemic hemorrhagic fever virus. I. Electron microscopic observation of virus in human diploid cell line]. Zhonghua Liu Xing Bing Xue Za Zhi 1983; 4:137-9. [PMID: 6414714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Donets MA, Rezapkin GV, Korolev MB, Tkachenko EA. [Virus--the causative agent of hemorrhagic fever with renal syndrome--a new representative of the family Bunyaviridae]. Vopr Virusol 1983:330-3. [PMID: 6412459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Physicochemical characteristics (sedimentation coefficient, buoyant density of particles, as well as ribonuclein of these particles) and morphology of the causative agent of hemorrhagic fever with renal syndrome were found to be similar to those of the other members of the Bunyaviridae family.
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Hung T, Xia SM, Song G, Liao HX, Chao TX, Chou ZY, Hang CS. Viruses of classical and mild forms of haemorrhagic fever with renal syndrome isolated in China have similar bunyavirus-like morphology. Lancet 1983; 1:589-91. [PMID: 6131283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Hung T, Xia SM, Zhao TX, Zhou JY, Song G, Liao GX, Ye WW, Chu YL, Hang CS. Morphological evidence for identifying the viruses of hemorrhagic fever with renal syndrome as candidate members of the Bunyaviridae family. Brief report. Arch Virol 1983; 78:137-44. [PMID: 6139996 DOI: 10.1007/bf01310869] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Thin section immuno-electron microscopy has been successfully applied to investigate and identify the classical and mild form of HFRS viruses isolated in the People's Republic of China. The results showed that all the 8 strains studied (derived from different parts of China, adapted in different cell lines) share a common morphology and morphogenesis. Essentially, the viruses possess characteristics of members of the Bunyaviridae Family, however, differing by a larger size and size variation and formation of cytoplasmic viral inclusions.
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Abstract
Korean haemorrhagic fever (KHF) (Hantaan virus), a rodent-borne viral illness, is an important cause of human disease throughout much of Asia and Eastern Europe. The agent responsible for KHF has not yet been conclusively identified. Plaque-purified KHF virus was concentrated and then banded in a potassium tartrate gradient. Material from the 1.17-1.19 g/ml band was examined by electron microscopy and particles with a morphology identical to that of the family Bunyaviridae were found. The particles were aggregated by KHF serum but not by saline solution or non-immune serum. Identification of KHF virus as a member of the family Bunyaviridae implies a potential for spread by arthropod vectors.
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Abstract
The morphology and morphogenesis of three strains of Hantaan virus, which causes Korean haemorrhagic fever (KHF), were examined by thin-section and negative-contrast electron microscopy of infected A549 cell-culture specimens. In thin sections, virus was detected within cytoplasmic granular matrices (viroplasms) of the infected cells. Virus particles were spherical (diameter 73 +/- 5 nm), and had an extremely electron-dense core (diameter 47 +/- 6.5 nm). Replication and maturation of the virus seemed to occur in the viroplasm. As infection progressed, viral particles increased in number and were packed into the granular matrices as cytoplasmic crystalline arrays. Viruses seemed to be released from infected cells by cell dissolution. Negative-contrast staining showed that the virus had an icosahedral structure (diameter 80 +/- 2 nm) and annular surface capsomeres. Viruses clumped when exposed to anti-Hantaan virus serum from a convalescent patient. The morphology and morphogenesis of the virus were compatible with those of orbiviruses.
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