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Suzuki Y, Takai S, Morizane Y, Yasuda K, Takahashi K, Ishitsuka T, Sasaki Y, Otsuka M, Kato S, Madarame H, Sugiyama M, Kawaguchi H, Kakuda T. Development of monoclonal antibodies against Rhodococcus equi virulence-associated protein N and their application to pathological diagnosis. Microbiol Spectr 2023; 11:e0072923. [PMID: 37800907 PMCID: PMC10714782 DOI: 10.1128/spectrum.00729-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 08/02/2023] [Indexed: 10/07/2023] Open
Abstract
IMPORTANCE Rhodococcus equi can cause infection in ruminants, and its pathogenicity is suggested to be associated with VapN. Despite its wide distribution, no immunological diagnostic method has been developed for VapN-producing R. equi. Against this background, we attempted to develop monoclonal antibodies targeting VapN and assess their application in immunostaining. In the study, mice were immunized with recombinant VapN, and cell fusion and cloning by limiting dilution permitted the generation of three antibody-producing hybridomas. The utility of the antibodies produced from the hybridomas in immunostaining was demonstrated using an infected mouse model, and the antibodies were further applied to previously reported cases of R. equi infection in goats and cattle. Although the 4H4 antibody induced the strongest reactions, the reactivity of two other antibodies was improved by antigen retrieval. Our monoclonal antibodies will be utilized to support the definitive diagnosis of suspected R. equi infection, including cases that were previously missed.
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Affiliation(s)
- Yasunori Suzuki
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Shinji Takai
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Yuri Morizane
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Kentaro Yasuda
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Kei Takahashi
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Toko Ishitsuka
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Yukako Sasaki
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Mikihiro Otsuka
- The Gifu Central Livestock Hygiene Service Center, Gifu, Japan
| | - Satoru Kato
- The Gifu Central Livestock Hygiene Service Center, Gifu, Japan
| | - Hiroo Madarame
- Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Azabu University, Kanagawa, Japan
| | - Makoto Sugiyama
- Laboratory of Veterinary Anatomy, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Hiroaki Kawaguchi
- Laboratory of Veterinary Pathology, Kitasato University School of Veterinary Medicine, Aomori, Japan
| | - Tsutomu Kakuda
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Aomori, Japan
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Shofa M, Saito A. Generation of porcine PK-15 cells lacking the Ifnar1 or Stat2 gene to optimize the efficiency of viral isolation. PLoS One 2023; 18:e0289863. [PMID: 37939052 PMCID: PMC10631621 DOI: 10.1371/journal.pone.0289863] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/04/2023] [Indexed: 11/10/2023] Open
Abstract
Because pigs are intermediate or amplifying hosts for several zoonotic viruses, the pig-derived PK-15 cell line is an indispensable tool for studying viral pathogenicity and developing treatments, vaccines, and preventive measures to mitigate the risk of disease outbreaks. However, we must consider the possibility of contamination by type I interferons (IFNs), such as IFNα and IFNβ, or IFN-inducing substances, such as virus-derived double-stranded RNA or bacterial lipopolysaccharides, in clinical samples, leading to lower rates of viral isolation. In this study, we aimed to generate a PK-15 cell line that can be used to isolate viruses from clinical samples carrying a risk of contamination by IFN-inducing substances. To this end, we depleted the IFN alpha and beta receptor subunit 1 (Ifnar1) gene or signal transducer and activator of transcription 2 (Stat2) gene in PK-15 cells using the clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 method. Treatment of PK-15 cells lacking Ifnar1 or Stat2 with IFNβ or poly (I:C) resulted in no inhibitory effects on viral infection by a lentiviral vector, influenza virus, and Akabane virus. These results demonstrate that PK-15 cells lacking Ifnar1 or Stat2 could represent a valuable and promising tool for viral isolation, vaccine production, and virological investigations.
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Affiliation(s)
- Maya Shofa
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
- Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan
| | - Akatsuki Saito
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
- Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan
- Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan
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Konishi T, Kimura T, Minauchi K, Tanaka S. Fibrinous pericarditis secondary to recurrent acute myeloid leukaemia. Eur Heart J Case Rep 2023; 7:ytad537. [PMID: 38025125 PMCID: PMC10645415 DOI: 10.1093/ehjcr/ytad537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/24/2023] [Accepted: 11/01/2023] [Indexed: 12/01/2023]
Affiliation(s)
- Takao Konishi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, West 7, North 15, Kita-ku, Sapporo 060-8638, Japan
| | - Taichi Kimura
- Department of Cancer Pathology, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Koichiro Minauchi
- Department of Hematology, Sapporo City General Hospital, Sapporo, Japan
| | - Shinya Tanaka
- Department of Cancer Pathology, Faculty of Medicine, Hokkaido University, Sapporo, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Japan
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Kishigami K, Kanehisa H, Qi S, Arimitsu T, Miyachi M, Iemitsu M, Sanada K. Relationship between thigh muscle cross-sectional areas and single leg stand-up test in Japanese older women. PLoS One 2022; 17:e0269103. [PMID: 35700158 PMCID: PMC9197025 DOI: 10.1371/journal.pone.0269103] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 05/13/2022] [Indexed: 11/19/2022] Open
Abstract
In older adults, the quantitative decline of the quadriceps femoris is associated with the augmentation of difficulty in the execution of a stand-up task. However, it is unclear whether the cross-sectional areas (CSAs) of individual thigh muscles differ between older adults who can stand up from a 40-cm-height chair on a single leg and those who cannot. To investigate this, the present study determined the CSAs of individual mid-thigh muscles in 67 Japanese women aged 60–77 years by using a magnetic resonance imaging method. Participants were asked to stand up from a 40-cm-height chair on a single leg, and those who could and could not stand up without leaning back and maintain a standing posture for 3 seconds on a single leg were allocated into the successful group (SG, n = 40) and unsuccessful group (USG, n = 27), respectively. Only the CSA of the adductors (sum of the adductor longus and adductor magnus) was significantly smaller in USG compared to SG. When CSA was expressed relative to the two-third power of body mass, the values for the four heads of the quadriceps femoris and biceps femoris long head, as well as the adductors, were significantly lower in USG than in SG. The current results indicate that in terms of the value relative to body mass, the reduced CSAs of the adductors and biceps femoris long head, as well as the four heads of the quadriceps femoris, are associated with the failure of attempts to stand up from a 40-cm-height chair on a single leg in older women. This may be due to the anatomical function of the two muscle groups, which contributes to hip extension movement involved in transitioning from a sitting position to a standing position during the stand-up task.
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Affiliation(s)
- Keiko Kishigami
- College of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Hiroaki Kanehisa
- College of Sport and Health Science, Ritsumeikan University, Shiga, Japan
- National Institute of Fitness and Sports in KANOYA, Kagoshima, Japan
| | - Shumeng Qi
- College of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Takuma Arimitsu
- College of Sport and Health Science, Ritsumeikan University, Shiga, Japan
- Faculty of Health Care, Department of Human Health Hachinohe Gakuin University, Aomori, Japan
| | - Motohiko Miyachi
- Faculty of Sport Sciences, School of Sport and Sciences, Waseda University, Tokyo, Japan
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - Motoyuki Iemitsu
- College of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Kiyoshi Sanada
- College of Sport and Health Science, Ritsumeikan University, Shiga, Japan
- * E-mail:
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Sugiura K, Lei Z, Holley C, Haga T. Assessing the risk of ASFV entry into Japan through pork products illegally brought in by air passengers from China and fed to pigs in Japan. PLoS One 2020; 15:e0232132. [PMID: 32369517 PMCID: PMC7199999 DOI: 10.1371/journal.pone.0232132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/07/2020] [Indexed: 02/04/2023] Open
Abstract
A risk assessment was conducted to assess the risk of ASFV entry into Japan through pork products illegally brought in by air passengers from China and fed to pigs in Japan. Scenario tree modelling was used with the following entry and exposure pathway considered to be the most likely route of ASF entry: an ASFV infected pork product is illegally brought into Japan by air travellers from China; this pork product is then used in a restaurant where scrap waste is recycled for animal feed and subsequently fed to pigs without being heat-treated. Input parameter values were based on surveys conducted by the authors, scientific data gathered from the literature and official data published by government agencies. The annual probability of ASFV entry into Japan via this pathway was predicted to be 0.20 (90% prediction interval: 0.00-0.90). The wide prediction interval was mainly caused by the uncertainty regarding the dose response relation of ASFV, followed by the probability of an ASF infected pig dying on affected farms, the loading of ASFV in an infected pig and the probability of an illegally imported pork product being heat-treated in China and used in restaurants. The results of scenario analysis revealed that the annual probability of ASFV entry into Japan will increase with an increase in the number of ASF affected farms in China. The probability of ASFV entry will increase substantially even if only a small proportion of Ecofeed is not heat-treated during the production process. The probability will decrease if an increased proportion of farms that feed swill apply heat-treatment before feeding swill to their pigs. These findings indicate that stringent application of heat-treatment of Ecofeed and swill is key to protecting the Japanese pig industry from the introduction of ASFV.
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Affiliation(s)
- Katsuaki Sugiura
- Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Zhihao Lei
- Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Caitlin Holley
- Regional Representation for Asian and Pacific, World Organisation for Animal Health (OIE), Bunkyo-ku, Tokyo, Japan
| | - Takeshi Haga
- Department of Veterinary Medical Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Horimoto T, Hiono T, Mekata H, Odagiri T, Lei Z, Kobayashi T, Norimine J, Inoshima Y, Hikono H, Murakami K, Sato R, Murakami H, Sakaguchi M, Ishii K, Ando T, Otomaru K, Ozawa M, Sakoda Y, Murakami S. Nationwide Distribution of Bovine Influenza D Virus Infection in Japan. PLoS One 2016; 11:e0163828. [PMID: 27682422 PMCID: PMC5040247 DOI: 10.1371/journal.pone.0163828] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 09/14/2016] [Indexed: 12/20/2022] Open
Abstract
Cattle are major reservoirs of the provisionally named influenza D virus, which is potentially involved in the bovine respiratory disease complex. Here, we conducted a serological survey for the influenza D virus in Japan, using archived bovine serum samples collected during 2010–2016 from several herds of apparently healthy cattle in various regions of the country. We found sero-positive cattle across all years and in all the prefectural regions tested, with a total positivity rate of 30.5%, although the positivity rates varied among regions (13.5–50.0%). There was no significant difference in positivity rates for Holstein and Japanese Black cattle. Positivity rates tended to increase with cattle age. The herds were clearly divided into two groups: those with a high positive rate and those with a low (or no) positive rate, indicating that horizontal transmission of the virus occurs readily within a herd. These data demonstrate that bovine influenza D viruses have been in circulation for at least 5 years countrywide, emphasizing its ubiquitous distribution in the cattle population of Japan.
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Affiliation(s)
- Taisuke Horimoto
- 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
- * E-mail:
| | - Takahiro Hiono
- Laboratory of Microbiology, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060–0818, Japan
| | - Hirohisa Mekata
- Organization for Promotion of Tenure Track, University of Miyazaki, 1–1 Gakuen Kibanadai-nishi, Miyazaki, 889–2192, Japan
- Center for Animal Disease Control, University of Miyazaki, 1–1 Gakuen Kibanadai-nishi, Miyazaki, 889–2192, Japan
| | - Tomoha Odagiri
- 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
| | - Zhihao Lei
- 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
| | - Tomoya Kobayashi
- 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
| | - Junzo Norimine
- Center for Animal Disease Control, University of Miyazaki, 1–1 Gakuen Kibanadai-nishi, Miyazaki, 889–2192, Japan
| | - Yasuo Inoshima
- Laboratory of Food and Environmental Hygiene, United Graduate School of Veterinary Sciences, Gifu University, 1–1 Yanagido, Gifu, 501–1193, Japan
| | - Hirokazu Hikono
- Laboratory of Veterinary Microbiology, Co-department of Veterinary Medicine, Iwate University, 3-18-8 Ueda, Morioka, Iwate, 020–8550, Japan
| | - Kenji Murakami
- Laboratory of Veterinary Microbiology, Co-department of Veterinary Medicine, Iwate University, 3-18-8 Ueda, Morioka, Iwate, 020–8550, Japan
| | - Reiichiro Sato
- Laboratory of Internal Medicine 3, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252–5201, Japan
| | - Hironobu Murakami
- Laboratory of Animal Health 2, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252–5201, Japan
| | - Masahiro Sakaguchi
- Laboratory of Microbiology 1, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252–5201, Japan
| | - Kazunori Ishii
- Ishii Veterinary Clinic, 4-4-25 Nakamikunigaoka, Sakai-ku, Sakai, 590–0022, Osaka, Japan
| | - Takaaki Ando
- Laboratory of Theriogenology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890–0065, Japan
- United Graduate School of Veterinary Science, Yamaguchi University, 1677–1 Yoshida, Yamaguchi, 753–8515, Japan
| | - Kounosuke Otomaru
- Veterinary Teaching Hospital, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890–0065, Japan
| | - Makoto Ozawa
- United Graduate School of Veterinary Science, Yamaguchi University, 1677–1 Yoshida, Yamaguchi, 753–8515, Japan
- Laboratory of Animal Hygiene, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890–0065, Japan
- Transboundary Animal Diseases Control and Research Center, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890–0065, Japan
| | - Yoshihiro Sakoda
- Laboratory of Microbiology, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18 Nishi 9, Kita-ku, Sapporo, 060–0818, Japan
| | - Shin Murakami
- 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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