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Takenaka-Uema A, Bangphoomi N, Shioda C, Uchida K, Gen F, Kato K, Haga T, Murakami S, Akashi H, Hoimoto T. Characterization of a recombinant Akabane mutant virus with knockout of a nonstructural protein NSs in a pregnant goat model. Virol Sin 2017; 31:274-7. [PMID: 27068656 DOI: 10.1007/s12250-015-3704-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Akiko Takenaka-Uema
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan.,Department of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Norasuthi Bangphoomi
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan.,Department of Preclinical and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Phutthamonthon Nakhonpathom, 73170, Thailand
| | - Chieko Shioda
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Kazuyuki Uchida
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Fumihiro Gen
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan.,Department of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Kentaro Kato
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan.,National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, 080-8555, Japan
| | - Takeshi Haga
- Department of Infection Control and Disease Prevention, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Shin Murakami
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Hiroomi Akashi
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan
| | - Taisuke Hoimoto
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japan.
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Takenaka-Uema A, Sugiura K, Bangphoomi N, Shioda C, Uchida K, Kato K, Haga T, Murakami S, Akashi H, Horimoto T. Development of an improved reverse genetics system for Akabane bunyavirus. J Virol Methods 2016; 232:16-20. [DOI: 10.1016/j.jviromet.2015.12.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 12/15/2015] [Accepted: 12/17/2015] [Indexed: 10/22/2022]
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Ishihara Y, Shioda C, Bangphoomi N, Sugiura K, Saeki K, Tsuda S, Iwanaga T, Takenaka-Uema A, Kato K, Murakami S, Uchida K, Akashi H, Horimoto T. Akabane virus nonstructural protein NSm regulates viral growth and pathogenicity in a mouse model. J Vet Med Sci 2016; 78:1391-1397. [PMID: 27181086 PMCID: PMC5059365 DOI: 10.1292/jvms.16-0140] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The biological function of a nonstructural protein, NSm, of Akabane virus (AKAV) is
unknown. In this study, we generated a series of NSm deletion mutant viruses by reverse
genetics and compared their phenotypes. The mutant in which the NSm coding region was
almost completely deleted could not be rescued, suggesting that NSm plays a role in virus
replication. We next generated mutant viruses possessing various partial deletions in NSm
and identified several regions critical for virus infectivity. All rescued mutant viruses
produced smaller plaques and grew inefficiently in cell culture, compared to the wild-type
virus. Interestingly, although the pathogenicity of NSm deletion mutant viruses varied in
mice depending on their deletion regions and sizes, more than half the mice died following
infection with any mutant virus and the dead mice exhibited encephalitis as in wild-type
virus-inoculated mice, indicating their neuroinvasiveness. Abundant viral antigens were
detected in the brain tissues of dead mice, whereas appreciable antigen was not observed
in those of surviving mice, suggesting a correlation between virus growth rate in the
brain and neuropathogenicity in mice. We conclude that NSm affects AKAV replication
in vitro as well as in vivo and that it may function
as a virulence factor.
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Affiliation(s)
- Yukari Ishihara
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Abstract
A one-year-old, female Mexican axolotl (Ambystoma mexicanum) had a rough-surfaced, polypoid, pink tumor mass of approximately 10 mm in diameter in the oral cavity. Histologically, the tumor extended from the ethmoturbinate region and into the oral cavity and had replaced some of the maxillary bone tissue. The tumor mass was composed of a lobular architecture of small round-shaped tumor cells with occasional Flexner-Wintersteiner-like rosette formation. There were no metastatic lesions in the other organs. Immunohistochemically, the tumor cells were partly positive for several neural markers (class III beta-tubulin, S-100 protein, and doublecortin) and intensely positive for an epithelial marker (cytokeratin AE1/AE3). These results suggest that the present tumor originated from neuroectodermal tissue. Considering the location and histological and immunohistochemical features of the tumor, a diagnosis of olfactory neuroblastoma was made.
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Affiliation(s)
- Chieko Shioda
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Science, The University of Tokyo, 1–1–1 Yayoi, Bunkyo-ku, Tokyo 113–8657, Japan
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Shioda Y, Shioda C, Akita R, Ishida M, Kitamura E. [Medical care accompanied by nursing service in a private clinic--a trial and prospect of private practice. Discussion]. Kangogaku Zasshi 1980; 44:590-603. [PMID: 6770142] [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: 01/21/2023]
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