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Azami NAM, Moi ML, Salleh SA, Neoh HM, Kamaruddin MA, Jalal NA, Ismail N, Takasaki T, Kurane I, Jamal R. Dengue epidemic in Malaysia: urban versus rural comparison of dengue immunoglobulin G seroprevalence among Malaysian adults aged 35-74 years. Trans R Soc Trop Med Hyg 2021; 114:798-811. [PMID: 32735681 DOI: 10.1093/trstmh/traa056] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 06/15/2020] [Accepted: 07/02/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND A periodic serosurvey of dengue seroprevalence is vital to determine the prevalence of dengue in countries where this disease is endemic. This study aimed to determine the prevalence of dengue immunoglobulin G (IgG) seropositivity among healthy Malaysian adults living in urban and rural areas. METHODS A total of 2598 serum samples (1417 urban samples, 1181 rural samples) were randomly collected from adults ages 35-74 y. The presence of the dengue IgG antibody and neutralising antibodies to dengue virus (DENV) 1-4 was determined using enzyme-linked immunosorbent assay and the plaque reduction neutralisation test assay, respectively. RESULTS The prevalence of dengue IgG seropositivity was 85.39% in urban areas and 83.48% in rural areas. The seropositivity increased with every 10-y increase in age. Ethnicity was associated with dengue seropositivity in urban areas but not in rural areas. The factors associated with dengue seropositivity were sex and working outdoors. In dengue IgG-positive serum samples, 98.39% of the samples had neutralising antibodies against DENV3, but only 70.97% of them had neutralising antibodies against DENV4. CONCLUSION The high seroprevalence of dengue found in urban and rural areas suggests that both urban and rural communities are vital for establishing and sustaining DENV transmission in Malaysia.
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Affiliation(s)
- Nor Azila Muhammad Azami
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, 56000, Malaysia
| | - Meng Ling Moi
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Sharifah Azura Salleh
- Department of Medical Microbiology and Immunology, University Kebangsaan Malaysia Medical Centre, Kuala Lumpur, 56000, Malaysia
| | - Hui-Min Neoh
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, 56000, Malaysia
| | - Mohd Arman Kamaruddin
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, 56000, Malaysia
| | - Nazihah Abdul Jalal
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, 56000, Malaysia
| | - Norliza Ismail
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, 56000, Malaysia
| | - Tomohiko Takasaki
- Kanagawa Prefectural Institute of Public Health, Kanagawa, 253-0087, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, Tokyo, 162-8640, Japan
| | - Rahman Jamal
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, 56000, Malaysia
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Kuramitsu M, Okuma K, Tezuka K, Nakamura H, Sagara Y, Kurane I, Hamaguchi I. Development and evaluation of human T-cell leukemia virus-1 and -2 multiplex quantitative PCR. Microbiol Immunol 2019; 63:458-464. [PMID: 31429972 DOI: 10.1111/1348-0421.12740] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/31/2019] [Accepted: 08/12/2019] [Indexed: 01/25/2023]
Abstract
The diagnosis of human T -cell leukemia virus type 1 (HTLV-1) infection in Japan is usually performed by serological testing, but the high rate of indeterminate results from western blotting makes it difficult to assess the infection accurately. Nucleic acid tests for HTLV-1 and/or HTLV-2 are used to confirm infection with HTLV-1 and/or HTLV-2 and are also used for the follow-up of HTLV-1 related diseases. To prepare a highly sensitive method that can discern infection with HTLV-1 and HTLV-2, a multiplex quantitative polymerase chain reaction (qPCR) by large-scale primer screening was developed. Sensitivity and specificity were evaluated by serial dilution of cell lines and by testing with known clinical samples. The resulting multiplex qPCR can detect about four copies of HTLV-1 provirus per 105 cells. Moreover, HTLV-1 provirus could be detected in 97.2% (205 of 211) of HTLV-1 seropositive clinical samples. These sensitivities were sufficiently high compared with the methods reported previously. Also, all the HTLV-2 seropositive clinical samples tested were found to be positive by this method (three of three). In conclusion, this method can successfully and simultaneously detect both types of HTLV-1 and HTLV-2 provirus with extremely high sensitivity.
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Affiliation(s)
- Madoka Kuramitsu
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kazu Okuma
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kenta Tezuka
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hitomi Nakamura
- Department of Quality, Japanese Red Cross Kyushu Block Blood Center, Fukuoka, Japan
| | - Yasuko Sagara
- Department of Quality, Japanese Red Cross Kyushu Block Blood Center, Fukuoka, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Isao Hamaguchi
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
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Kinoshita H, Nakamichi K, Lim CK, Takayama-Ito M, Wang L, Iizuka I, Kurane I, Saijo M. Correction to: A loop-mediated isothermal amplification assay for the detection and quantification of JC polyomavirus in cerebrospinal fluid: a diagnostic and clinical management tool and technique for progressive multifocal leukoencephalopathy. Virol J 2018; 15:154. [PMID: 30296946 PMCID: PMC6176501 DOI: 10.1186/s12985-018-1057-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 09/18/2018] [Indexed: 11/10/2022] Open
Abstract
In the original publication of article [1], '20 × 101 copies', which is in the sentence 'As seen in Fig. 4, the sensitivity of the specimens containing equal to or more than 20 × 101 copies in 2 μL of extracted DNA (equivalent to ≥3.0 × 103 copies/mL CSF) was 100% (29/29)' changes to '2.0 × 101 copies' in results section. The publisher apologizes to the readers and authors for the inconvenience.
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Affiliation(s)
- Hitomi Kinoshita
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Kazuo Nakamichi
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Chang-Kweng Lim
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Mutsuyo Takayama-Ito
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Lixin Wang
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan.,Present Address: School of Tropical and Laboratory, Hainan Medical University, Haikou, 571199, Hainan, China
| | - Itoe Iizuka
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan.
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Kinoshita H, Nakamichi K, Lim CK, Takayama-Ito M, Wang L, Iizuka I, Kurane I, Saijo M. A loop-mediated isothermal amplification assay for the detection and quantification of JC polyomavirus in cerebrospinal fluid: a diagnostic and clinical management tool and technique for progressive multifocal leukoencephalopathy. Virol J 2018; 15:136. [PMID: 30170628 PMCID: PMC6119251 DOI: 10.1186/s12985-018-1046-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 08/20/2018] [Indexed: 01/24/2023] Open
Abstract
Background JC polyomavirus (JCV) is the causative agent of progressive multifocal leukoencephalopathy (PML), a demyelinating disease of the central nervous system in immunosuppressed patients. PML usually has a poor prognosis. Detection and quantification of the JCV genome in cerebrospinal fluid (CSF) is an efficacious tool for the diagnosis and management of PML, for which proper therapeutic interventions are required. Methods A loop-mediated isothermal amplification (LAMP) assay was applied for the quantitative detection of JCV. The LAMP assay was evaluated for the efficacy in diagnosis of PML in comparison with the TaqMan-based quantitative real-time PCR (qPCR) assay using 153 CSF specimens collected from patients with suspected PML. Results The LAMP assay showed no cross-reactivity against other polyomavirus plasmids, viral DNA, and viral RNA, which causes encephalitis, and detected 1 copy of the standard DNA per reaction. Among 50 qPCR-positives, 42 specimens (containing JCV genome ranged from 3.2 × 100 to 3.2 × 106 copies/reaction) showed positive reactions and 8 specimens (containing 0.9 to 19.9 copies/reaction) showed negative in the LAMP assay. Furthermore, 3 of 103 qPCR-negative specimens showed positive reactions in the LAMP assay. The sensitivity, specificity, positive predictive value, and negative predictive values of the LAMP assay were 84% (42/50), 97% (100/103), 93% (42/45), and 93% (100/108), respectively. The kappa statistic was 0.83. The JCV loads determined by the LAMP assay showed a strong positive correlation with those determined by the qPCR assay for 33 specimens with copy numbers of ≥1 copies/reaction (r = 0.89). Additionally, the LAMP assay could monitor the JCV genome copy number in CSF for sequential samples equivalently to qPCR assay. Conclusions The newly developed LAMP assay is highly specific against JCV and detect the JCV genome in the sample DNA containing 20 or more copies of JCV genome per reaction with 100% sensitivity (n = 29), which corresponds to ≥3 × 103 copies/mL of CSF. The LAMP assay is useful for the diagnosis and offers valuable information for the evaluation and management of PML in the clinical setting.
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Affiliation(s)
- Hitomi Kinoshita
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Kazuo Nakamichi
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Chang-Kweng Lim
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Mutsuyo Takayama-Ito
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Lixin Wang
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan.,Present Address: School of Tropical and Laboratory, Hainan Medical University, Hainan, 571199, China
| | - Itoe Iizuka
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan.
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Azami NAM, Moi ML, Ami Y, Suzaki Y, Lim CK, Taniguchi S, Saijo M, Takasaki T, Kurane I. Genotype-specific and cross-reactive neutralizing antibodies induced by dengue virus infection: detection of antibodies with different levels of neutralizing activities against homologous and heterologous genotypes of dengue virus type 2 in common marmosets (Callithrix jacchus). Virol J 2018; 15:51. [PMID: 29587780 PMCID: PMC5870686 DOI: 10.1186/s12985-018-0967-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 08/09/2017] [Accepted: 03/19/2018] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND A vaccine against all four dengue virus (DENV) serotypes includes the formulation of one genotype of each serotype. Although genetic similarities among genotypes within a serotype are higher as compared to those among serotypes, differences in the immunogenicity of the included genotypes would be a critical issue in maximizing successful dengue vaccine development. Thus, we determined the neutralizing antibody responses against three genotypes of dengue virus serotype 2 (DENV-2), namely Cosmopolitan, Asian I, and Asian/American, after primary and secondary inoculation with DENV-2 in a dengue animal model, the common marmoset (Callithrix jacchus). METHODS A total of fifty-four plasma samples were obtained from thirty-four marmosets that were inoculated with clinically-isolated DENV strains or DENV candidate vaccines, were used in this study. Plasma samples were obtained from marmosets after primary inoculation with DENV-2 infection, secondary inoculation with homologous or heterologous genotypes, and tertiary inoculation with heterologous DENV. Neutralizing antibody titers against DENV-2 (Cosmopolitan, Asian I, and Asian/American genotypes) and DENV-1 were determined using a conventional plaque reduction neutralization assay. RESULTS In marmosets that were inoculated with the Cosmopolitan genotype in primary infection, neutralizing antibody neutralized 3 genotypes, and the titers to Asian I genotype were significantly higher than those to homologous Cosmopolitan genotype. After secondary DENV-2 infection with heterologous genotype (Asian I in primary and Asian/American in secondary), neutralizing antibody titers to Asian/American genotype was significantly higher than those against Cosmopolitan and Asian I genotypes. Following tertiary infection with DENV-1 following DENV-2 Asian I and Cosmopolitan genotypes, neutralizing antibody titers to Asian/American were also significantly higher than those against Cosmopolitan and Asian I genotypes. CONCLUSION The present study demonstrated that different levels of neutralizing antibodies were induced against variable DENV-2 genotypes after primary, secondary and tertiary infections, and that neutralizing antibody titers to some heterologous genotypes were higher than those to homologous genotypes within a serotype. The results indicate that heterogeneity and homogeneity of infecting genotypes influence the levels and cross-reactivity of neutralizing antibodies induced in following infections. The results also suggest that certain genotypes may possess advantage in terms of breakthrough infections against vaccination.
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Affiliation(s)
- Nor Azila Muhammad Azami
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
| | - Meng Ling Moi
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Yasushi Ami
- Division of Experimental Animal Research, National Institute of Infectious Diseases, Tokyo, Japan
| | - Yuriko Suzaki
- Division of Experimental Animal Research, National Institute of Infectious Diseases, Tokyo, Japan
| | - Chang-Kweng Lim
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Satoshi Taniguchi
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo, 162-8640 Japan
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6
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Moi ML, Ami Y, Muhammad Azami NA, Shirai K, Yoksan S, Suzaki Y, Kitaura K, Lim CK, Saijo M, Suzuki R, Takasaki T, Kurane I. Marmosets (Callithrix jacchus) as a non-human primate model for evaluation of candidate dengue vaccines: induction and maintenance of specific protective immunity against challenges with clinical isolates. J Gen Virol 2017; 98:2955-2967. [PMID: 29160199 DOI: 10.1099/jgv.0.000913] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Dengue virus (DENV) is one of the major infectious diseases in tropical regions and approximately half of the world population is at risk of infection. Vaccines would offer an effective control measure against this disease. We previously reported on the utility of marmosets as an animal model for studying primary and secondary dengue infections. Infected marmosets consistently develop viraemia and antibody kinetics that reflect those of patients with dengue. Thus, it is important to determine the utility of marmosets as an animal model for demonstrating vaccine efficacy. In this study, marmosets were inoculated with candidate vaccine and parent strains and challenged with a clinical DENV strain. The viraemia and antibody kinetics in these marmosets were determined. Marmosets consistently develop lower viraemia with an attenuated vaccine strain. During secondary challenge, the IgM response was delayed, whereas the IgG levels rose rapidly, indicating a secondary antibody response. The neutralizing activities against the homotypic serotype were high; all marmosets were protected against viraemia following secondary inoculation. The viraemia markers and antibody responses were consistent with those of human DENV infection and vaccinees. These results demonstrate the utility of marmosets as an animal model for the study of vaccine efficacy.
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Affiliation(s)
- Meng Ling Moi
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Yasushi Ami
- Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | | | - Kenji Shirai
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
| | - Sutee Yoksan
- Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom, Thailand
| | - Yuriko Suzaki
- Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Kazutaka Kitaura
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
| | - Chang-Kweng Lim
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Ryuji Suzuki
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
| | | | - Ichiro Kurane
- National Institute of Infectious Diseases, Tokyo, Japan
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Iizuka I, Ami Y, Suzaki Y, Nagata N, Fukushi S, Ogata M, Morikawa S, Hasegawa H, Mizuguchi M, Kurane I, Saijo M. A Single Vaccination of Nonhuman Primates with Highly Attenuated Smallpox Vaccine, LC16m8, Provides Long-term Protection against Monkeypox. Jpn J Infect Dis 2017; 70:408-415. [PMID: 28003603 DOI: 10.7883/yoken.jjid.2016.417] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Monkeypox virus (MPXV) causes human monkeypox (human MPX), which is a similar disease to smallpox in humans. A previous study showed that a single vaccination of monkeys with LC16m8, a highly attenuated smallpox vaccine, protected them from MPX from 4-5 weeks post-vaccination. In this study, we evaluated the long-term efficacy of a single vaccination with LC16m8 in a nonhuman primate model of MPXV infection. The monkeys were inoculated with either LC16m8, Lister (parental strain of LC16m8), or a mock-up vaccine, and then challenged with MPXV via a subcutaneous route, at 6 and 12 months after vaccination, which we compared with either Lister or the mock-up vaccination. The LC16m8 monkeys exhibited almost no MPX-associated symptoms, whereas most of the naïve monkeys died. LC16m8 generated the protective memory immune response against MPXV, as suggested by the immediate viremia reduction and the response of the IgG antibody. The results demonstrated that the vaccination of monkeys with a single dose of LC16m8 provided durable protection against MPXV for longer than one year after immunization. The results suggest that the vaccination of humans with LC16m8 could induce long-term protection against MPXV infection.
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Affiliation(s)
- Itoe Iizuka
- Laboratory of Special Pathogens, Department of Virology 1, National Institute of Infectious Diseases
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo
| | - Yasushi Ami
- Department of Experimental Animals Research, National Institute of Infectious Diseases
| | - Yuriko Suzaki
- Department of Experimental Animals Research, National Institute of Infectious Diseases
| | - Noriyo Nagata
- Department of Pathology, National Institute of Infectious Diseases
| | - Shuetsu Fukushi
- Laboratory of Special Pathogens, Department of Virology 1, National Institute of Infectious Diseases
| | - Momoko Ogata
- Laboratory of Special Pathogens, Department of Virology 1, National Institute of Infectious Diseases
| | - Shigeru Morikawa
- Department of Veterinary Science, National Institute of Infectious Diseases
| | - Hideki Hasegawa
- Department of Pathology, National Institute of Infectious Diseases
| | - Masashi Mizuguchi
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo
| | | | - Masayuki Saijo
- Laboratory of Special Pathogens, Department of Virology 1, National Institute of Infectious Diseases
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo
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Izumiya H, Furukawa M, Ogata K, Isobe J, Watanabe S, Sasaki M, Ichinose K, Arakawa E, Morita M, Kurane I, Ohnishi M. A double-quadratic model for predicting Vibrio species in water environments of Japan. Arch Microbiol 2017. [PMID: 28646477 DOI: 10.1007/s00203-017-1402-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Vibrio spp. are natural inhabitants of marine and estuarine environments. Vibrio cholerae, Vibrio parahaemolyticus, and Vibrio vulnificus are the major infectious agents for humans. Their densities are affected by environmental factors such as water temperature and salinity. The detailed contribution of each factor still remains to be elucidated. Here we conducted multi-coastal study in a 21-month period to examine relationships between environmental factors and V. cholerae, V. parahaemolyticus and V. vulnificus densities in sea surface water in eight coastal sites of four prefectures in Japan. Vibrio densities were measured by a most-probable-number with PCR method which is highly sensitive and quantitative (3/100 ml of detection limit). Vibrio densities were analyzed with environmental factors including water temperature, salinity, total dissolved substance, and pH, and their quadratics. A linear regression model suited best for prediction of V. cholerae density. A novel double-quadratic model suited best for the prediction of V. parahaemolyticus and V. vulnificus densities.
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Affiliation(s)
| | - Masato Furukawa
- Kumamoto Prefectural Institute of Public-Health and Environmental Science, Kumamoto, Japan
| | - Kikuyo Ogata
- Oita Prefectural Institute of Health and Environment, Oita, Japan
| | | | - Setsu Watanabe
- Miyagi Prefectural Institute of Public Health and Environment, Miyagi, Japan
| | - Mari Sasaki
- Oita Prefectural Institute of Health and Environment, Oita, Japan
| | - Kazuya Ichinose
- Oita Prefectural Institute of Health and Environment, Oita, Japan
| | - Eiji Arakawa
- National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Ichiro Kurane
- National Institute of Infectious Diseases, Tokyo, Japan
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Yamanaka A, Moi ML, Takasaki T, Kurane I, Konishi E. Neutralizing and enhancing antibody responses to five genotypes of dengue virus type 1 (DENV-1) in DENV-1 patients. J Gen Virol 2017; 98:166-172. [PMID: 27911254 DOI: 10.1099/jgv.0.000669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Dengue virus (DENV) has four distinct serotypes, DENV-1-4, with four to six genotypes in each serotype. The World Health Organization recommends tetravalent formulations including one genotype of each serotype as safe and effective dengue vaccines. Here, we investigated the impact of genotype on the neutralizing antibody responses to DENV-1 in humans. Convalescent sera collected from patients with primary infection of DENV-1 were examined for neutralizing antibody against single-round infectious particles of the five DENV-1 genotypes (GI-GV). In both GI- and GIV-infected patients, their neutralizing antibody titres against the five genotypes were similar, differing ≤4-fold from the homogenotypic responses. The enhancing activities against the five genotypes were also similar in these sera. Thus, the genotype strains of DENV-1 showed no significant antigenic differences in these patients, suggesting that GI- or GIV-derived vaccine antigens should induce equivalent levels of neutralizing antibodies against all DENV-1 genotypes.
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Affiliation(s)
- Atsushi Yamanaka
- BIKEN Endowed Department of Dengue Vaccine Development, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand.,BIKEN Endowed Department of Dengue Vaccine Development, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Meng Ling Moi
- Present address: Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan.,Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Tomohiko Takasaki
- Present address: Kanagawa Prefectural Institute of Public Health, Kanagawa, Japan.,Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Eiji Konishi
- BIKEN Endowed Department of Dengue Vaccine Development, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan.,BIKEN Endowed Department of Dengue Vaccine Development, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand
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10
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Yamanaka A, Moi ML, Takasaki T, Kurane I, Matsuda M, Suzuki R, Konishi E. Utility of Japanese encephalitis virus subgenomic replicon-based single-round infectious particles as antigens in neutralization tests for Zika virus and three other flaviviruses. J Virol Methods 2017; 243:164-171. [PMID: 28219763 DOI: 10.1016/j.jviromet.2017.02.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 02/16/2017] [Accepted: 02/17/2017] [Indexed: 11/18/2022]
Abstract
The introduction of a foreign virus into an area may cause an outbreak, as with the Zika virus (ZIKV) outbreak in the Americas. Preparedness for handling a viral outbreak involves the development of tests for the serodiagnosis of foreign virus infections. We previously established a gene-based technology to generate some flaviviral antigens useful for functional antibody assays. The technology utilizes a Japanese encephalitis virus subgenomic replicon to generate single-round infectious particles (SRIPs) that possess designed surface antigens. In the present study, we successfully expanded the capacity of SRIPs to four human-pathogenic mosquito-borne flaviviruses that could potentially be introduced from endemic to non-endemic countries: ZIKV, Sepik virus, Wesselsbron virus, and Usutu virus. Flavivirus-crossreactive monoclonal antibodies dose-dependently neutralized these SRIPs. ZIKV-SRIPs also produced antibody-dose-dependent neutralization curves equivalent to those shown by authentic ZIKV particles using sera from a Zika fever patient. The faithful expression of designed surface antigens on SRIPs will allow their use in neutralization tests to diagnose foreign flaviviral infections.
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Affiliation(s)
- Atsushi Yamanaka
- BIKEN Endowed Department of Dengue Vaccine Development, Faculty of Tropical Medicine, Mahidol University,420/6 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand(3); BIKEN Endowed Department of Dengue Vaccine Development, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.
| | - Meng Ling Moi
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Tomohiko Takasaki
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Mami Matsuda
- Department of Virology II, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Ryosuke Suzuki
- Department of Virology II, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Eiji Konishi
- BIKEN Endowed Department of Dengue Vaccine Development, Faculty of Tropical Medicine, Mahidol University,420/6 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand(3); BIKEN Endowed Department of Dengue Vaccine Development, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
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11
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Takayama-Ito M, Lim CK, Nakamichi K, Kakiuchi S, Horiya M, Posadas-Herrera G, Kurane I, Saijo M. Reduction of animal suffering in rabies vaccine potency testing by introduction of humane endpoints. Biologicals 2016; 46:38-45. [PMID: 28040390 DOI: 10.1016/j.biologicals.2016.12.007] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 12/20/2016] [Indexed: 10/20/2022] Open
Abstract
Potency controls of inactivated rabies vaccines for human use are confirmed by the National Institutes of Health challenge test in which lethal infection with severe neurological symptoms should be observed in approximately half of the mice inoculated with the rabies virus. Weight loss, decreased body temperature, and the presence of rabies-associated neurological signs have been proposed as humane endpoints. The potential for reduction of animal suffering by introducing humane endpoints in the potency test for inactivated rabies vaccine for human use was investigated. The clinical signs were scored and body weight was monitored. The average times to death following inoculation were 10.49 and 10.99 days post-inoculation (dpi) by the potency and challenge control tests, respectively, whereas the average times to showing Score-2 signs (paralysis, trembling, and coma) were 6.26 and 6.55 dpi, respectively. Body weight loss of more than 15% appeared at 5.82 and 6.42 dpi. The data provided here support the introduction of obvious neuronal signs combined with a body weight loss of ≥15% as a humane endpoint to reduce the time of animal suffering by approximately 4 days.
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Affiliation(s)
| | - Chang-Kweng Lim
- Department of Virology I, National Institute of Infectious Diseases, Japan
| | - Kazuo Nakamichi
- Department of Virology I, National Institute of Infectious Diseases, Japan
| | - Satsuki Kakiuchi
- Department of Virology I, National Institute of Infectious Diseases, Japan
| | - Madoka Horiya
- Department of Virology I, National Institute of Infectious Diseases, Japan
| | | | - Ichiro Kurane
- Department of Virology I, National Institute of Infectious Diseases, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, Japan
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12
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Mizutani T, Sayama Y, Nakanishi A, Ochiai H, Sakai K, Wakabayashi K, Tanaka N, Miura E, Oba M, Kurane I, Saijo M, Morikawa S, Ono SI. Corrigendum to "Novel DNA virus isolated from samples showing endothelial cell necrosis in the Japanese eel, Anguilla japonica" [Virology 412 (2011) 179-187]. Virology 2016; 499:399-400. [PMID: 27825474 DOI: 10.1016/j.virol.2016.10.019] [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: 11/29/2022]
Affiliation(s)
- Tetsuya Mizutani
- Virology 1, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama, Tokyo 208-0011, Japan.
| | - Yusuke Sayama
- Virology 1, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama, Tokyo 208-0011, Japan; Department of Virology, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Akira Nakanishi
- National Center for Geriatrics and Gerontology, 35 Gengo, Morioka-machi, Obu, Aichi 474-8522, Japan
| | - Hideharu Ochiai
- Research Institute of Biosciences, Azabu University, Fuchinobe 1-17-71, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Kouji Sakai
- Division of Experimental Animals Research, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashi-Murayama, Tokyo 208-0011, Japan
| | - Kouji Wakabayashi
- School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu-ku, Shizuoka 424-8610, Japan
| | - Nozomi Tanaka
- School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu-ku, Shizuoka 424-8610, Japan
| | - Emi Miura
- School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu-ku, Shizuoka 424-8610, Japan
| | - Mami Oba
- Virology 1, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama, Tokyo 208-0011, Japan
| | - Ichiro Kurane
- Virology 1, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama, Tokyo 208-0011, Japan
| | - Masayuki Saijo
- Virology 1, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama, Tokyo 208-0011, Japan
| | - Shigeru Morikawa
- Virology 1, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama, Tokyo 208-0011, Japan
| | - Shin-Ichi Ono
- School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu-ku, Shizuoka 424-8610, Japan
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13
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Moi ML, Kobayashi D, Isawa H, Sasaki T, Saijo M, Kurane I, Sawabe K, Takasaki T. Dengue Virus Isolation in Mosquito Aedes albopictus Captured During an Outbreak in Tokyo, 2014, by a Method Relying on Antibody-Dependent Enhancement Mechanism Using FcγR-Expressing BHK Cells. Vector Borne Zoonotic Dis 2016; 16:810-812. [PMID: 27911695 DOI: 10.1089/vbz.2016.1982] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dengue virus (DENV) isolation from mosquitoes is necessary for providing definitive evidence of virus circulation, and is critical for further virological characterization and determination of epidemiological characteristics. By using Aedes albopictus mosquitoes captured during an outbreak in Tokyo in 2014, we compared the DENV isolation rates of a conventional virus isolation method that uses C6/36 mosquito cells as assay cells with those of a virus isolation method that relies on an antibody-dependent enhancement (ADE) mechanism by using FcγR-expressing baby hamster kidney (BHK) cells and an antibody with ADE activity. The number of DENV genome copies and infectious virus titers in cell culture supernatant fluids of FcγR-expressing BHK cells were significantly higher than those of the C6/36 cells. In addition, DENV was isolated from a mosquito pool by using FcγR-expressing BHK cells only in the presence of infection-enhancing antibody. Infectious virus was detected in six mosquito pools only by using FcγR-expressing BHK cells. The results suggest that the method that relies on ADE mechanism by using the FcγR-expressing BHK cells and an antibody with ADE activity is useful for DENV isolation from mosquitoes caught in the field.
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Affiliation(s)
- Meng Ling Moi
- 1 Institute of Tropical Medicine, Nagasaki University , Nagasaki, Japan .,2 Department of Virology 1, National Institute of Infectious Diseases , Tokyo, Japan
| | - Daisuke Kobayashi
- 3 Department of Medical Entomology, National Institute of Infectious Diseases , Tokyo, Japan
| | - Haruhiko Isawa
- 3 Department of Medical Entomology, National Institute of Infectious Diseases , Tokyo, Japan
| | - Toshinori Sasaki
- 3 Department of Medical Entomology, National Institute of Infectious Diseases , Tokyo, Japan
| | - Masayuki Saijo
- 2 Department of Virology 1, National Institute of Infectious Diseases , Tokyo, Japan
| | - Ichiro Kurane
- 4 National Institute of Infectious Diseases , Tokyo, Japan
| | - Kyoko Sawabe
- 3 Department of Medical Entomology, National Institute of Infectious Diseases , Tokyo, Japan
| | - Tomohiko Takasaki
- 2 Department of Virology 1, National Institute of Infectious Diseases , Tokyo, Japan .,5 Kanagawa Prefectural Institute of Public Health , Kanagawa, Japan
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14
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Tezuka K, Kuramitsu M, Okuma K, Nojima K, Araki K, Shinohara N, Matsumoto C, Satake M, Takasaki T, Saijo M, Kurane I, Hamaguchi I. Development of a novel dengue virus serotype-specific multiplex real-time reverse transcription-polymerase chain reaction assay for blood screening. Transfusion 2016; 56:3094-3100. [PMID: 27774649 DOI: 10.1111/trf.13875] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 07/22/2016] [Accepted: 07/28/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND Dengue fever is caused by four related RNA viruses of the genus Flavivirus, dengue virus (DENV)-1, -2, -3, and -4, which are transmitted to humans by mosquitoes. Although DENV is not endemic in Japan, an autochthonous dengue outbreak occurred in 2014. Several transfusion-transmitted cases have also been reported after the use of blood and plasma products in DENV-endemic countries. The aim of this study was to develop a novel multiplex reverse transcription-polymerase chain reaction (RT-PCR) assay for DENV blood screening. STUDY DESIGN AND METHODS Large-scale oligonucleotide screening was performed to obtain DENV-specific primers and probes using a variety of DENV clinical isolates. A multiplex RT-PCR assay was then developed using the identified oligonucleotides and the ability of this assay to detect DENV RNA was evaluated. RESULTS A number of oligonucleotides suitable for DENV RNA detection were identified and a novel DENV serotype-specific multiplex RT-PCR assay was successfully established. Comparative analysis revealed that the multiplex assay could detect levels of viral contamination as low as 100 viral copies/mL. CONCLUSION This established serotype-specific multiplex RT-PCR assay provides a simple, sensitive, and quantitative detection method for DENV, which could be applied in the screening of blood samples to prevent transfusion-transmitted DENV infection.
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Affiliation(s)
- Kenta Tezuka
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Madoka Kuramitsu
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kazu Okuma
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kiyoko Nojima
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kumiko Araki
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
| | - Naoya Shinohara
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
| | - Chieko Matsumoto
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
| | - Masahiro Satake
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
| | - Tomohiko Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Isao Hamaguchi
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, Tokyo, Japan
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15
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Saito Y, Moi ML, Takeshita N, Lim CK, Shiba H, Hosono K, Saijo M, Kurane I, Takasaki T. Japanese encephalitis vaccine-facilitated dengue virus infection-enhancement antibody in adults. BMC Infect Dis 2016; 16:578. [PMID: 27756212 PMCID: PMC5070094 DOI: 10.1186/s12879-016-1873-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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] [Received: 04/29/2016] [Accepted: 09/27/2016] [Indexed: 02/01/2023] Open
Abstract
Background Dengue virus (DENV) and Japanese encephalitis virus (JEV) belong to the genus Flavivirus, and infection with a virus within this genus induces antibodies that are cross-reactive to other flaviviruses. Particularly in DENV infection, antibodies to DENV possess two competing activities: neutralizing activity and infection-enhancing activity. These antibody activities are considered central in modulating clinical outcomes of DENV infection. Here, we determined the neutralizing and infection-enhancing activity of DENV cross-reactive antibodies in adults before and after JE vaccination. Methods Participants were 77 Japanese adults who had received a single dose of inactivated Vero cell-derived JE vaccine. A total of 154 serum samples were obtained either before or approximately a month after a single dose of JE vaccination. The antibody-dependent enhancement (ADE) activity to each of four DENV serotypes and the neutralizing activities to DENV and to JEV were determined in each of the serum samples by using baby hamster kidney (BHK) cells and FcγR-expressing BHK cells. Results A total of 18 post-JE immunization samples demonstrated cross-reactivity to DENV in an anti-DENV IgG ELISA. DENV neutralizing antibodies were not detected after JE vaccination in this study. However, undiluted post-JE vaccination serum samples from 26 participants demonstrated monotypic and heterotypic ADE activity to DENV. ADE activity was also observed in 1:10-diluted samples from 35 of the JE vaccine recipients (35/77, 45 %). Conclusion In summary, JE vaccination induced DENV cross-reactive antibodies, and at sub-neutralizing levels, these DENV cross-reactive antibodies possess DENV infection-enhancement activity. The results also indicate that cross-reactivity to DENV is associated with high levels of JEV neutralizing antibodies and, the DENV cross-reactivity is further facilitated by JE vaccination. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-1873-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yuka Saito
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, 162-8640, Japan.,College of Bioresource Science, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Meng Ling Moi
- Department of Virology, Institute of Tropical Medicine, Nagasaki University, Sakamoto 1-12-4, Nagasaki, Nagasaki, 852-8523, Japan.
| | - Nozomi Takeshita
- National Center for Global Health and Medicine, Tokyo, 162-8655, Japan
| | - Chang-Kweng Lim
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, 162-8640, Japan
| | - Hajime Shiba
- College of Bioresource Science, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Kuniaki Hosono
- College of Bioresource Science, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, 162-8640, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, Tokyo, 162-8640, Japan
| | - Tomohiko Takasaki
- Kanagawa Prefectural Institute of Public Health, Chigasaki, Kanagawa, 253-0087, Japan
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16
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Moi ML, Takasaki T, Kurane I. Human antibody response to dengue virus: implications for dengue vaccine design. Trop Med Health 2016; 44:1. [PMID: 27398060 PMCID: PMC4934144 DOI: 10.1186/s41182-016-0004-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 01/13/2016] [Indexed: 11/10/2022] Open
Abstract
Dengue, a global health threat, is a leading cause of morbidity and mortality in most tropical and subtropical countries. Dengue can range from asymptomatic, relatively mild dengue fever to severe and life-threatening dengue hemorrhagic fever. Disease severity and outcome is largely associated with the host immune response. Several candidate vaccines in clinical trials appear promising as effective measures for dengue disease control. Vaccine development has been hampered by safety and efficacy issues, driven by a lack of understanding of the host immune response. This review focuses on recent research findings on the dengue host immune response, particularly in humans, and the relevance of these findings to challenges in vaccine development.
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Affiliation(s)
- Meng Ling Moi
- />Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
- />National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Ichiro Kurane
- />National Institute of Infectious Diseases, Tokyo, Japan
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17
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Eto A, Saito T, Yokote H, Kurane I, Kanatani Y. Recent advances in the study of live attenuated cell-cultured smallpox vaccine LC16m8. Vaccine 2015; 33:6106-11. [PMID: 26319072 PMCID: PMC9533910 DOI: 10.1016/j.vaccine.2015.07.111] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 07/20/2015] [Accepted: 07/29/2015] [Indexed: 12/02/2022]
Abstract
LC16m8 is a live, attenuated, cell-cultured smallpox vaccine that was developed and licensed in Japan in the 1970s, but was not used in the campaign to eradicate smallpox. In the early 2000s, the potential threat of bioterrorism led to reconsideration of the need for a smallpox vaccine. Subsequently, LC16m8 production was restarted in Japan in 2002, requiring re-evaluation of its safety and efficacy. Approximately 50,000 children in the 1970s and about 3500 healthy adults in the 2000s were vaccinated with LC16m8 in Japan, and 153 adults have been vaccinated with LC16m8 or Dryvax in phase I/II clinical trials in the USA. These studies confirmed the safety and efficacy of LC16m8, while several studies in animal models have shown that LC16m8 protects the host against viral challenge. The World Health Organization Strategic Advisory Group of Experts on Immunization recommended LC16m8, together with ACAM2000, as a stockpile vaccine in 2013. In addition, LC16m8 is expected to be a viable alternative to first-generation smallpox vaccines to prevent human monkeypox.
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Affiliation(s)
- Akiko Eto
- Department of Health Crisis Management, National Institute of Public Health, 2-3-6 Minami, Wako-shi, 351-0197, Saitama, Japan
| | - Tomoya Saito
- Department of Health Crisis Management, National Institute of Public Health, 2-3-6 Minami, Wako-shi, 351-0197, Saitama, Japan
| | - Hiroyuki Yokote
- Chemo-Sero-Therapeutic Research Institute (Kaketsuken), 1-6-1 Okubo, Kita-ku, Kumamoto-shi, 860-8568, Kumamoto, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, 162-8640, Tokyo, Japan
| | - Yasuhiro Kanatani
- Department of Health Crisis Management, National Institute of Public Health, 2-3-6 Minami, Wako-shi, 351-0197, Saitama, Japan.
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18
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Tajima S, Yagasaki K, Kotaki A, Tomikawa T, Nakayama E, Moi ML, Lim CK, Saijo M, Kurane I, Takasaki T. In vitro growth, pathogenicity and serological characteristics of the Japanese encephalitis virus genotype V Muar strain. J Gen Virol 2015; 96:2661-2669. [PMID: 26048886 DOI: 10.1099/vir.0.000213] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [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: 12/26/2022] Open
Abstract
The characteristics of genotype V Japanese encephalitis virus (GV JEV) remain poorly understood as only two strains have been isolated to date. In this study, we examined the effects of the GV JEV Muar strain on in vitro growth and pathogenicity in mice; we also evaluated the efficacy of inactivated JEV vaccines against the Muar strain. Although growth of the Muar strain in mouse neuroblastoma N18 cells was clearly worse than that of the GIII Beijing-1 and GI Mie/41/2002 strains, neuroinvasiveness of the Muar strain was similar to that of the Beijing-1 strain and significantly higher than that of the Mie/41/2002 strain. The results of a plaque reduction neutralization test suggested that the neutralization ability of the JEV vaccines against the Muar strain was reduced compared with the GI and GIII strains. However, the protection potency of the JEV vaccine against the Muar strain was similar to that for the Beijing-1 strain in mice. Our data indicate that GV JEV has unique growth, virulence and antigenicity features.
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Affiliation(s)
- Shigeru Tajima
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Kazumi Yagasaki
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Akira Kotaki
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Takumi Tomikawa
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Eri Nakayama
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Meng Ling Moi
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Chang-Kweng Lim
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Ichiro Kurane
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Tomohiko Takasaki
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
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19
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Sakai K, Hagiwara K, Omatsu T, Hamasaki C, Kuwata R, Shimoda H, Suzuki K, Endoh D, Nagata N, Nagai M, Katayama Y, Oba M, Kurane I, Saijo M, Morikawa S, Mizutani T, Maeda K. Isolation and characterization of a novel Rhabdovirus from a wild boar (Sus scrofa) in Japan. Vet Microbiol 2015; 179:197-203. [PMID: 26116524 DOI: 10.1016/j.vetmic.2015.05.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 05/15/2015] [Accepted: 05/18/2015] [Indexed: 01/29/2023]
Abstract
A novel rhabdovirus was isolated from the serum of a healthy Japanese wild boar (Sus scrofa leucomystax) and identified using the rapid determination system for viral nucleic acid sequences (RDV), next-generation sequencing, and electron microscopy. The virus was tentatively named wild boar rhabdovirus 1 (WBRV1). Phylogenetic analysis of the entire genome sequence indicated that WBRV1 is closely related to Tupaia rhabdovirus (TRV), which was isolated from cultured cells of hepatocellular carcinoma tissue of tree shrew. TRV has not been assigned to any genus of Rhabdoviridae till date. Analysis of the L gene indicated that WBRV1 belongs to the genus Vesiculovirus. These observations suggest that both TRV and WBRV1 belong to a new genus of Rhabdoviridae. Next-generation genome sequencing of WBRV1 revealed 5 open reading frames of 1329, 765, 627, 1629, and 6336 bases in length. The WBRV1 gene sequences are similar to those of other rhabdoviruses. Epizootiological analysis of a population of wild boars in Wakayama prefecture in Japan indicated that 6.5% were positive for the WBRV1 gene and 52% were positive for WBRV1-neutralizing antibodies. Furthermore, such viral neutralizing antibodies were found in domestic pigs in another prefecture. WBRV1 was inoculated intranasally and intraperitoneally into SCID and BALB/c mice and viral RNA was detected in SCID mice, suggesting that WBRV1 can replicate in immunocompromised mice. These results indicate this novel virus is endemic in wild animals and livestock in Japan.
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Affiliation(s)
- Kouji Sakai
- Department of Virology 3, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Katsuro Hagiwara
- Virus Unit, School of Veterinary Medicine, Rakuno Gakuen University, 582 Midorimachi, Bunkyodai, Ebetsu, Hokkaido 069-8501, Japan
| | - Tsutomu Omatsu
- Research and Education center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Chinami Hamasaki
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Ryusei Kuwata
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Hiroshi Shimoda
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kazuo Suzuki
- Hikiiwa Park Center, 1629 Inari-cho, Tanabe 646-0051, Japan
| | - Daiji Endoh
- Department of Veterinary Radiology, School of Veterinary Medicine, Rakuno Gakuen University, 582 Midorimachi, Bunkyodai, Ebetsu-shi 069-8501, Japan
| | - Noriyo Nagata
- Department of Pathology, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Makoto Nagai
- Research and Education center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Yukie Katayama
- Research and Education center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Mami Oba
- Research and Education center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Shigeru Morikawa
- Department of Veterinary Science, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama, Tokyo 162-8640, Japan
| | - Tetsuya Mizutani
- Research and Education center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan.
| | - Ken Maeda
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan.
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Saito Y, Moi ML, Kotaki A, Ikeda M, Tajima S, Shiba H, Hosono K, Saijo M, Kurane I, Takasaki T. Detecting Dengue Virus Nonstructural Protein 1 (NS1) in Urine Samples Using ELISA for the Diagnosis of Dengue Virus Infection. Jpn J Infect Dis 2015; 68:455-60. [PMID: 25766601 DOI: 10.7883/yoken.jjid.2014.441] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Dengue virus (DENV) infection is a serious global health threat. For the surveillance and control of dengue, there is a need for robust diagnostic tools that are relatively easy to use and reliable in various clinical settings. We investigated the applicability of NS1 antigen detection in urine samples for the diagnosis of DENV. About 118 urine samples, obtained from 96 dengue patients at various phases of disease, were used for this study. NS1 antigen was detected by ELISA in the urine samples obtained from patients after 2-17 days of disease onset. Positive detection rates of NS1 antigen ranged between 13-43%. Based on real-time RT-PCR, positive detection rates of viral genome in the urine samples ranged between 20-33% on days 0 to ≥15. On days 11 to ≥15 after the disease onset, NS1 antigen was detected at similar rates in serum and urine samples. Additionally, NS1 antigen was detected in 2 urine samples, but not in the serum samples, on days 7 and 16 after the onset of the disease. The results confirm the applicability of NS1 antigen detection in urine samples using ELISA to diagnose acute DENV infection and suggests that the assay is potentially useful when only limited amounts of serum samples are available and in limited resource settings.
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Affiliation(s)
- Yuka Saito
- Department of Virology 1, National Institute of Infectious Diseases
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21
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Imai K, Maeda T, Sayama Y, Osa M, Mikita K, Kurane I, Miyahira Y, Kawana A, Miura S. Chronic Chagas disease with advanced cardiac complications in Japan: Case report and literature review. Parasitol Int 2015; 64:240-2. [PMID: 25744336 DOI: 10.1016/j.parint.2015.02.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 02/20/2015] [Accepted: 02/23/2015] [Indexed: 11/18/2022]
Abstract
Due to the unprecedented recent increases in global migration, Chagas disease has become a global health threat and its epidemiology has drastically changed. Here we describe the first case in Japan of benznidazole treatment for chronic Chagas disease characterized by advanced cardiac complications. A 55-year-old Japanese-Brazilian woman who had previously presented with chronic heart failure was diagnosed as having Chagas disease and treated with benznidazole to prevent aggravation of her cardiac complications. However, benznidazole administration was stopped on day 56 due to severe drug-induced peripheral neuritis. Sixteen months later, her serologic test for Trypanosoma cruzi is still positive and she is being followed regularly by cardiology. Despite an estimated prevalence of over 4000 cases in Japan, only a few cases of Chagas disease have been reported. A Medline search revealed only 7 cases identified between 1995 and 2014 in Japan: in 6 cases, complications of chronic Chagas disease were apparent at the time of presentation, and sudden death occurred in 2 of these cases due to cardiac complications. This clinical case and literature review re-emphasize the urgent need to establish a surveillance network and improve the diagnostic methods and treatment framework for Chagas disease in Japan.
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Affiliation(s)
- Kazuo Imai
- Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Takuya Maeda
- Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, National Defense Medical College, Saitama, Japan.
| | - Yusuke Sayama
- Infectious Disease Research Department, Central Blood Institute, Japanese Red Cross Society, Tokyo, Japan
| | - Morichika Osa
- Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Kei Mikita
- Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, Tokyo, Japan
| | - Yasushi Miyahira
- Department of Global Infectious Diseases and Tropical Medicine, National Defense Medical College, Saitama, Japan
| | - Akihiko Kawana
- Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, National Defense Medical College, Saitama, Japan
| | - Sachio Miura
- Infectious Disease Research Department, Central Blood Institute, Japanese Red Cross Society, Tokyo, Japan
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22
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Moi ML, Ami Y, Shirai K, Lim CK, Suzaki Y, Saito Y, Kitaura K, Saijo M, Suzuki R, Kurane I, Takasaki T. Formation of infectious dengue virus-antibody immune complex in vivo in marmosets (Callithrix jacchus) after passive transfer of anti-dengue virus monoclonal antibodies and infection with dengue virus. Am J Trop Med Hyg 2014; 92:370-6. [PMID: 25548383 DOI: 10.4269/ajtmh.14-0455] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Infection with a dengue virus (DENV) serotype induces cross-reactive, weakly neutralizing antibodies to different dengue serotypes. It has been postulated that cross-reactive antibodies form a virus-antibody immune complex and enhance DENV infection of Fc gamma receptor (FcγR)-bearing cells. We determined whether infectious DENV-antibody immune complex is formed in vivo in marmosets after passive transfer of DENV-specific monoclonal antibody (mAb) and DENV inoculation and whether infectious DENV-antibody immune complex is detectable using FcγR-expressing cells. Marmosets showed that DENV-antibody immune complex was exclusively infectious to FcγR-expressing cells on days 2, 4, and 7 after passive transfer of each of the mAbs (mAb 4G2 and mAb 6B6C) and DENV inoculation. Although DENV-antibody immune complex was detected, contribution of the passively transferred antibody to overall viremia levels was limited in this study. The results indicate that DENV cross-reactive antibodies form DENV-antibody immune complex in vivo, which is infectious to FcγR-bearing cells but not FcγR-negative cells.
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Affiliation(s)
- Meng Ling Moi
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Yasushi Ami
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Kenji Shirai
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Chang-Kweng Lim
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Yuriko Suzaki
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Yuka Saito
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Kazutaka Kitaura
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Ryuji Suzuki
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
| | - Tomohiko Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan; Division of Experimental Animal Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan; Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan; College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan; National Institute of Infectious Diseases, Tokyo, Japan
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23
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Imai K, Maeda T, Sayama Y, Mikita K, Fujikura Y, Misawa K, Nagumo M, Iwata O, Ono T, Kurane I, Miyahira Y, Kawana A, Miura S. Mother-to-child transmission of congenital Chagas disease, Japan. Emerg Infect Dis 2014; 20:146-8. [PMID: 24378113 PMCID: PMC3884731 DOI: 10.3201/eid2001.131071] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We report a patient with congenital Chagas disease in Japan. This report reemphasizes the role of neglected and emerging tropical diseases in the era of globalization. It also indicates the need for increased vigilance for detecting Chagas disease in non-disease-endemic countries.
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24
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Tajima S, Kotaki A, Yagasaki K, Taniwaki T, Moi ML, Nakayama E, Saijo M, Kurane I, Takasaki T. Identification and amplification of Japanese encephalitis virus and Getah virus propagated from a single porcine serum sample: a case of coinfection. Arch Virol 2014; 159:2969-75. [PMID: 24986716 DOI: 10.1007/s00705-014-2152-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 06/14/2014] [Indexed: 11/28/2022]
Abstract
We detected two viruses, Japanese encephalitis virus (JEV)/Kochi/01/2005 and Getah virus (GETV)/Kochi/01/2005 in the same culture supernatant obtained by inoculation of Vero cells with a swine serum sample and subsequent passaging of the supernatant in Vero cells. Phylogenetic analysis using the nucleotide sequences of the complete genome and the E2 region of GETV indicated that GETV/Kochi/01/2005 is most similar to a Mongolian strain. In contrast, a partial sequence of the nsP1 protein coding region of GETV/Kochi/01/2005 showed that it was similar to Japanese strains isolated in the 1980s. Alignment of the nucleotide sequence of the E region of JEV showed that JEV/Kochi/01/2005 has the highest similarity to a Japanese strain. We also examined the changes in the amount of JEV/Kochi/01/2005 and GETV/Kochi/01/2005 present after passaging in Vero cells. The RNA copy number and infectious titer of JEV/Kochi/01/2005 decreased, whereas those of GETV/Kochi/01/2005 increased, following repeated passages in Vero cells. Our results provide evidence for coinfection with JEV and GETV in the Kochi/01/2005 pig. This is the first report of incidental confection with JEV and GETV in a domestic animal.
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Affiliation(s)
- Shigeru Tajima
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo, 162-8640, Japan,
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25
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Nagata N, Saijo M, Kataoka M, Ami Y, Suzaki Y, Sato Y, Iwata-Yoshikawa N, Ogata M, Kurane I, Morikawa S, Sata T, Hasegawa H. Pathogenesis of fulminant monkeypox with bacterial sepsis after experimental infection with West African monkeypox virus in a cynomolgus monkey. Int J Clin Exp Pathol 2014; 7:4359-70. [PMID: 25120821 PMCID: PMC4129056] [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] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 07/01/2014] [Indexed: 06/03/2023]
Abstract
The pathogenesis of severe human monkeypox, which causes systemic and fulminant infections, is not clear. This study presents a case repot of fulminant monkeypox with bacterial sepsis after experimental infection with monkeypox virus in a cynomolgus monkey (Macaca fascicularis). In our previous study (Saijo et al., 2009, J Gen Virol), two cynomolgus monkeys became moribund after experimental infection with monkeypox virus Liberia strain, West African strain. One exhibited typical monkeypox-related papulovesicular lesions. The other monkey presented fulminant clinical symptoms with a characteristic flat red rash similar to that found in smallpox, which is associated with extremely high fatality rates. In this study, we found that the monkey with flat red rash had high levels of viremia and neutropenia, as well as high plasma levels of pro-inflammatory cytokines and chemokines compared with the other monkey. Monkeypox virus replicates in epithelial cells and macrophages in various organs. Sepsis due to Gram-positive cocci was confirmed histopathologically in the monkey with flat red rash. The lack of inflammatory response in the lesion suggested that the monkey with sepsis experienced strong immune suppression during the viral infection. The neutropenia and excessive inflammatory cytokine responses indicate that neutrophils play key roles in the pathogenesis of systemic and fulminant human monkeypox virus infections with sepsis.
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Affiliation(s)
- Noriyo Nagata
- Department of Pathology, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Michiyo Kataoka
- Department of Pathology, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Yasushi Ami
- Department of Division of Experimental Animals Research, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Yuriko Suzaki
- Department of Division of Experimental Animals Research, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Yuko Sato
- Department of Pathology, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Naoko Iwata-Yoshikawa
- Department of Pathology, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Momoko Ogata
- Department of Virology 1, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Shigeru Morikawa
- Department of Veterinary Science, National Institute of Infectious Diseases1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Tetsutaro Sata
- Department of Pathology, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
| | - Hideki Hasegawa
- Department of Pathology, National Institute of Infectious Diseases4-7-1 Gakuen, Musashimurayama, Tokyo 208-0011, Japan
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26
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Runtuwene LR, Konishi E, Yamanaka A, Makino Y, Suzuki Y, Takasaki T, Kurane I, Kobayashi T, Eshita Y. Dengue transmission model by means of viremic adult immuno-competent mouse. Parasit Vectors 2014; 7:143. [PMID: 24685121 PMCID: PMC3976050 DOI: 10.1186/1756-3305-7-143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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] [Received: 11/11/2013] [Accepted: 03/24/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dengue virus infection manifests in three distinct forms in humans: dengue fever, dengue hemorrhagic fever, and dengue shock syndrome. Infection with the virus is a fatal disease; no vaccine is available and prevention depends on interruption of the chain of transmission. The study of dengue viral transmission by mosquitoes is hindered due to the lack of an affordable animal model. In general, immuno-competent mice are used as a simple and inexpensive animal model, but mice are not susceptible to dengue virus infection and therefore viremia will not occur following the inoculation of the virus in such mice. Here, we report a method for creating artificial viremia in immuno-competent mice, and further demonstrate the use of viremic mice to simultaneously infect a large number of Aedes aegypti. METHODS We infected K562 cells with DENV-2 in the presence of an antibody against DENV-4. We then incubated the cells for 2 d before injecting the infected cells into C3H mice. After 5 h incubation, we allowed 100-150 female Aedes aegypti to feed on blood from the mice directly. We collected blood samples from the mice and from randomly selected Ae. aegypti at 2, 6, 12, and 24 h post-blood meal and screened the samples for DENV-2 genome as well as for virus concentration. RESULTS Our procedure provided high virus concentrations in the mice for at least 7 h after viral inoculation. We found that 13 out of 14 randomly picked mosquitoes were infected with DENV-2. High concentrations of virus were detected in the mosquitoes until at least 12 h post-infection. CONCLUSIONS Using the viremic immuno-competent mouse, we show that mass infection of Ae. aegypti is achievable. Compared to other infection techniques using direct inoculation, membrane-feeding, or immuno-deficient/humanized mice, we are confident that this method will provide a simpler and more efficient infection technique.
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Affiliation(s)
- Lucky Ronald Runtuwene
- Department of Infectious Disease Control, Faculty of Medicine, Oita University, Oita 879-5593, Japan.
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27
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Wang LX, Takayama-Ito M, Kinoshita-Yamaguchi H, Kakiuchi S, Suzutani T, Nakamichi K, Lim CK, Kurane I, Saijo M. Characterization of DNA polymerase-associated acyclovir-resistant herpes simplex virus type 1: mutations, sensitivity to antiviral compounds, neurovirulence, and in-vivo sensitivity to treatment. Jpn J Infect Dis 2014; 66:404-10. [PMID: 24047739 DOI: 10.7883/yoken.66.404] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Acyclovir (ACV)-resistant (ACV(r)) mutants were generated from plaque-purified ACV-sensitive herpes simplex virus type 1 (HSV-1) by culturing the virus in Vero cells in the presence of 2-amino-7-(1,3-dihydroxy-2-propoxymethyl) purine (S2242). Three DNA polymerase (DNApol)-associated ACV(r) HSV-1 generated under ACV selection in a previous study (Suzutani, T., Ishioka, K., De Clercq, E., et al., Antimicrob. Agents Chemother., 47, 1707-1713, 2003) were also included. The sensitivity of the mutants to other antivirals and their neurovirulence were determined. The treatment efficacy of ACV and ganciclovir (GCV) against ACV(r) HSV-1 infections was evaluated in mice. Amino acid substitutions were demonstrated in conserved regions II and III in DNApol in 5 of the 6 mutants, while the other substitution was located in non-conserved regions. DNApol-associated ACV(r) clones showed cross-resistance to foscarnet, penciclovir, and vidarabine but were sensitive or hypersensitive to GCV, brivudin, sorivudine, and spongothymidine. The ACV(r) clone with an N815S mutation in DNApol showed similar neurovirulence to that of the parent virus; however, those with other mutations showed attenuation. GCV was effective in the treatment of the ACV(r) clone with similar virulence to that of parent HSV-1, while ACV was less effective in mice. These results indicate the importance of the characterization of HSV-1 isolates for the proper treatment of HSV-1 infections exhibiting ACV-resistance.
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Affiliation(s)
- Li-Xin Wang
- Department of Virology 1, National Institute of Infectious Diseases
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28
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Yamanaka A, Iwakiri A, Yoshikawa T, Sakai K, Singh H, Himeji D, Kikuchi I, Ueda A, Yamamoto S, Miura M, Shioyama Y, Kawano K, Nagaishi T, Saito M, Minomo M, Iwamoto N, Hidaka Y, Sohma H, Kobayashi T, Kanai Y, Kawagishi T, Nagata N, Fukushi S, Mizutani T, Tani H, Taniguchi S, Fukuma A, Shimojima M, Kurane I, Kageyama T, Odagiri T, Saijo M, Morikawa S. Imported case of acute respiratory tract infection associated with a member of species nelson bay orthoreovirus. PLoS One 2014; 9:e92777. [PMID: 24667794 PMCID: PMC3965453 DOI: 10.1371/journal.pone.0092777] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 02/26/2014] [Indexed: 11/19/2022] Open
Abstract
A Japanese man suffered from acute respiratory tract infection after returning to Japan from Bali, Indonesia in 2007. Miyazaki-Bali/2007, a strain of the species of Nelson Bay orthoreovirus, was isolated from the patient's throat swab using Vero cells, in which syncytium formation was observed. This is the sixth report describing a patient with respiratory tract infection caused by an orthoreovirus classified to the species of Nelson Bay orthoreovirus. Given the possibility that all of the patients were infected in Malaysia and Indonesia, prospective surveillance on orthoreovirus infections should be carried out in Southeast Asia. Furthermore, contact surveillance study suggests that the risk of human-to-human infection of the species of Nelson Bay orthoreovirus would seem to be low.
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Affiliation(s)
- Atsushi Yamanaka
- Department of Internal Medicine, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Miyazaki, Japan
| | - Akira Iwakiri
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Miyazaki, Miyazaki, Japan
| | - Tomoki Yoshikawa
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Kouji Sakai
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Harpal Singh
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Daisuke Himeji
- Department of Internal Medicine, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Miyazaki, Japan
| | - Ikuo Kikuchi
- Department of Internal Medicine, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Miyazaki, Japan
| | - Akira Ueda
- Department of Internal Medicine, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Miyazaki, Japan
| | - Seigo Yamamoto
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Miyazaki, Miyazaki, Japan
| | - Miho Miura
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Miyazaki, Miyazaki, Japan
| | - Yoko Shioyama
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Miyazaki, Miyazaki, Japan
| | - Kimiko Kawano
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Miyazaki, Miyazaki, Japan
| | - Tokiko Nagaishi
- Nichinan Public Health Office of Miyazaki Prefecture, Nichinan, Miyzakaki, Japan
| | - Minako Saito
- Nichinan Public Health Office of Miyazaki Prefecture, Nichinan, Miyzakaki, Japan
| | - Masumi Minomo
- Nichinan Public Health Office of Miyazaki Prefecture, Nichinan, Miyzakaki, Japan
| | - Naoyasu Iwamoto
- Nichinan Public Health Office of Miyazaki Prefecture, Nichinan, Miyzakaki, Japan
| | - Yoshio Hidaka
- Miyazaki City Public Health Office, Miyazaki, Miyazaki, Japan
| | - Hirotoshi Sohma
- Health Promotion Division, Miyazaki Prefecture Government, Miyazaki, Miyazaki, Japan
| | - Takeshi Kobayashi
- Laboratory of Viral Replication, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Yuta Kanai
- Laboratory of Viral Replication, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Takehiro Kawagishi
- Laboratory of Viral Replication, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Noriyo Nagata
- Department of Pathology, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Shuetsu Fukushi
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Tetsuya Mizutani
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Hideki Tani
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Satoshi Taniguchi
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Aiko Fukuma
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Masayuki Shimojima
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Ichiro Kurane
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Tsutomu Kageyama
- Influenza virus Research Center, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Takato Odagiri
- Influenza virus Research Center, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Masayuki Saijo
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
- * E-mail:
| | - Shigeru Morikawa
- Special Pathogens Laboratory, Department of Virology 1, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
- Department of Veterinary Science, National Institute of Infectious Diseases, Shinjuku, Tokyo, Japan
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Takayama-Ito M, Nakamichi K, Kinoshita H, Kakiuchi S, Kurane I, Saijo M, Lim CK. A sensitive in vitro assay for the detection of residual viable rabies virus in inactivated rabies vaccines. Biologicals 2014; 42:42-7. [DOI: 10.1016/j.biologicals.2013.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 10/31/2013] [Accepted: 11/07/2013] [Indexed: 10/25/2022] Open
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Nakamichi K, Inoue N, Shimokawa T, Kurane I, Lim CK, Saijo M. Detection of human herpesviruses in the cerebrospinal fluid from patients diagnosed with or suspected of having progressive multifocal leukoencephalopathy. BMC Neurol 2013; 13:200. [PMID: 24330281 PMCID: PMC3878787 DOI: 10.1186/1471-2377-13-200] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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] [Received: 09/26/2013] [Accepted: 12/05/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Progressive multifocal leukoencephalopathy (PML), a fatal demyelinating disease caused by JC virus (JCV), occurs mainly in immunocompromised patients. While JCV DNA is detected in the cerebrospinal fluid (CSF) from a certain proportion of patients suspected of having PML, JCV-negative patients may also develop brain lesions due to other infectious agents. This study assessed the prevalence of six herpesviruses in the CSF from patients diagnosed with or suspected of PML. METHODS Two hundred and ninety-nine CSF specimens and clinical data were collected from 255 patients, including 31 confirmed PML cases. Quantitative PCR assays were carried out to detect the genomic DNA of JCV, herpes simplex virus (HSV), varicella-zoster virus (VZV), cytomegalovirus (CMV), Epstein-Barr virus (EBV), and human herpesvirus 6 (HHV-6). RESULTS Herpesvirus DNAs were detected in the CSF specimens from 29 of 255 patients (11.4%). HSV-1 and CMV were detected in JCV-negative patients, whereas VZV and EBV were detected in both CSF JCV-positive and -negative individuals. The herpesvirus-positive patients had underlying disorders that caused immunosuppression, such as HIV infection, congenital immunodeficiencies, and hematologic malignancies, and presented with neurologic symptoms and MRI lesions, mainly in the cerebral white matter. The median values of CSF cell counts and protein levels in the herpesvirus-positive patients were slightly higher than those in the PML patients. CONCLUSIONS The results demonstrate that herpesviruses are occasionally detected in the CSF from PML patients and immunocompromised individuals suspected of having PML. Thus, this study provides a significant basis for the diagnosis and treatment of neurological disorders in immunocompromised patients.
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Affiliation(s)
- Kazuo Nakamichi
- Department of Virology 1, National Institute of Infectious Diseases, Toyama 1-23-1, Shinjuku-ku, Tokyo 162-8640, Japan.
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Moi ML, Takasaki T, Omatsu T, Nakamura S, Katakai Y, Ami Y, Suzaki Y, Saijo M, Akari H, Kurane I. Demonstration of marmosets (Callithrix jacchus) as a non-human primate model for secondary dengue virus infection: high levels of viraemia and serotype cross-reactive antibody responses consistent with secondary infection of humans. J Gen Virol 2013; 95:591-600. [PMID: 24323638 DOI: 10.1099/vir.0.060384-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
There are four dengue virus (DENV) serotypes. Primary infection with one does not confer protective immunity against the others. We have reported previously that the marmoset (Callithrix jacchus) is a useful primary DENV infection model. It has been reported that secondary DENV infection with a heterotypic serotype induces viraemia kinetics and antibody responses that differ from those in primary infection. Thus, it is important to determine the utility of the marmoset as a model for secondary DENV infection. Marmosets were infected with heterologous DENV by secondary inoculation, and viraemia kinetics and antibody responses were analysed. The marmosets consistently developed high levels of viraemia after the secondary inoculation with heterologous DENV serotypes. IgM responses were lower compared with primary inoculation responses, whilst IgG responses were rapid and high. Neutralizing activities, which possessed serotype cross-reactive activities, were detected as early as 4 days after inoculation. In addition, infectious viraemia titres were higher when assayed with Fcγ receptor-expressing baby hamster kidney (BHK) cells than when assayed with conventional BHK cells, suggesting the presence of infectious virus-antibody immune complexes. After secondary infection with heterotypic DENV, the marmosets demonstrated viraemia kinetics, IgM and IgG responses, and high levels of serotype cross-reactive neutralizing antibody responses, all of which were consistent with secondary DENV infection in humans. The results indicate the marmoset as a useful animal for studying secondary, as well as primary, DENV infection.
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Affiliation(s)
- Meng Ling Moi
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tomohiko Takasaki
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tsutomu Omatsu
- Research and Education Center for Prevention of Global Infectious Diseases of Animals, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Shinichiro Nakamura
- Research Center for Animal Life Science, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Yuko Katakai
- Laboratory of Disease Control, Tsukuba Primate Research Center, National Institute of Biomedical Innovation, Ibaraki, Japan
| | - Yasushi Ami
- Division of Experimental Animal Research, National Institute of Infectious Diseases, Tokyo, Japan
| | - Yuriko Suzaki
- Division of Experimental Animal Research, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hirofumi Akari
- Section of Comparative Immunology and Microbiology, Center for Human Evolution Modeling Research Institute, Kyoto University, Inuyama, Aichi, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, Tokyo, Japan
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Takahashi T, Maeda K, Suzuki T, Ishido A, Shigeoka T, Tominaga T, Kamei T, Honda M, Ninomiya D, Sakai T, Senba T, Kaneyuki S, Sakaguchi S, Satoh A, Hosokawa T, Kawabe Y, Kurihara S, Izumikawa K, Kohno S, Azuma T, Suemori K, Yasukawa M, Mizutani T, Omatsu T, Katayama Y, Miyahara M, Ijuin M, Doi K, Okuda M, Umeki K, Saito T, Fukushima K, Nakajima K, Yoshikawa T, Tani H, Fukushi S, Fukuma A, Ogata M, Shimojima M, Nakajima N, Nagata N, Katano H, Fukumoto H, Sato Y, Hasegawa H, Yamagishi T, Oishi K, Kurane I, Morikawa S, Saijo M. The first identification and retrospective study of Severe Fever with Thrombocytopenia Syndrome in Japan. J Infect Dis 2013; 209:816-27. [PMID: 24231186 PMCID: PMC7107388 DOI: 10.1093/infdis/jit603] [Citation(s) in RCA: 569] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background. Severe fever with thrombocytopenia syndrome (SFTS) is caused by SFTS virus (SFTSV), a novel bunyavirus reported to be endemic in central and northeastern China. This article describes the first identified patient with SFTS and a retrospective study on SFTS in Japan. Methods. Virologic and pathologic examinations were performed on the patient's samples. Laboratory diagnosis of SFTS was made by isolation/genome amplification and/or the detection of anti-SFTSV immunoglobulin G antibody in sera. Physicians were alerted to the initial diagnosis and asked whether they had previously treated patients with symptoms similar to those of SFTS. Results. A female patient who died in 2012 received a diagnosis of SFTS. Ten additional patients with SFTS were then retrospectively identified. All patients were aged ≥50 years and lived in western Japan. Six cases were fatal. The ratio of males to females was 8:3. SFTSV was isolated from 8 patients. Phylogenetic analyses indicated that all of the Japanese SFTSV isolates formed a genotype independent to those from China. Most patients showed symptoms due to hemorrhage, possibly because of disseminated intravascular coagulation and/or hemophagocytosis. Conclusions. SFTS has been endemic to Japan, and SFTSV has been circulating naturally within the country.
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Kawabata H, Ando S, Kishimoto T, Kurane I, Takano A, Nogami S, Fujita H, Tsurumi M, Nakamura N, Sato F, Takahashi M, Ushijima Y, Fukunaga M, Watanabe H. First Detection ofRickettsiain Soft-Bodied Ticks Associated with Seabirds, Japan. Microbiol Immunol 2013; 50:403-6. [PMID: 16714848 DOI: 10.1111/j.1348-0421.2006.tb03807.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [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: 11/26/2022]
Abstract
Rickettsia was first detected in seabird soft-bodied ticks, Carios capensis and C. sawaii in Japan. According to sequence analysis, Rickettsia in Japan was identical to Rickettsia scc31 in C. capensis in the U.S.A. This suggested that an environmental circulation had consisted among microorganisms, ticks and long distance migratory seabirds around the Pacific Ocean.
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Affiliation(s)
- Hiroki Kawabata
- Department of Bacteriology, National Institute of Infectious Diseases, Shinjoku-ku, Tokyo 162-8640, Japan.
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Pandey BD, Nabeshima T, Pandey K, Rajendra SP, Shah Y, Adhikari BR, Gupta G, Gautam I, Tun MMN, Uchida R, Shrestha M, Kurane I, Morita K. First isolation of dengue virus from the 2010 epidemic in Nepal. Trop Med Health 2013; 41:103-11. [PMID: 24155651 PMCID: PMC3801155 DOI: 10.2149/tmh.2012-17] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 04/23/2013] [Indexed: 11/23/2022] Open
Abstract
Dengue is an emerging disease in Nepal and was first observed as an outbreak in nine lowland districts in 2006. In 2010, however, a large epidemic of dengue occurred with 4,529 suspected and 917 serologically-confirmed cases and five deaths reported in government hospitals in Nepal. The collection of demographic information was performed along with an entomological survey and clinical evaluation of the patients. A total of 280 serum samples were collected from suspected dengue patients. These samples were subjected to routine laboratory investigations and IgM-capture ELISA for dengue serological identification, and 160 acute serum samples were used for virus isolation, RT-PCR, sequencing and phylogenetic analysis. The results showed that affected patients were predominately adults, and that 10% of the cases were classified as dengue haemorrhagic fever/ dengue shock syndrome. The genetic characterization of dengue viruses isolated from patients in four major outbreak areas of Nepal suggests that the DENV-1 strain was responsible for the 2010 epidemic. Entomological studies identified Aedes aegypti in all epidemic areas. All viruses belonged to a monophyletic single clade which is phylogenetically close to Indian viruses. The dengue epidemic started in the lowlands and expanded to the highland areas. To our knowledge, this is the first dengue isolation and genetic characterization reported from Nepal.
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Affiliation(s)
- Basu D Pandey
- Sukra Raj Tropical and Infectious Disease Hospital, Nepal ; Everest International Clinic and Research Center, Kathmandu, Nepal
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Moi ML, Takasaki T, Saijo M, Kurane I. Determination of antibody concentration as the main parameter in a dengue virus antibody-dependent enhancement assay using FcγR-expressing BHK cells. Arch Virol 2013; 159:103-16. [DOI: 10.1007/s00705-013-1787-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 04/26/2013] [Indexed: 11/29/2022]
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Sakai K, Yoshikawa T, Seki F, Fukushi S, Tahara M, Nagata N, Ami Y, Mizutani T, Kurane I, Yamaguchi R, Hasegawa H, Saijo M, Komase K, Morikawa S, Takeda M. Canine distemper virus associated with a lethal outbreak in monkeys can readily adapt to use human receptors. J Virol 2013; 87:7170-5. [PMID: 23596291 PMCID: PMC3676118 DOI: 10.1128/jvi.03479-12] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 04/04/2013] [Indexed: 02/01/2023] Open
Abstract
A canine distemper virus (CDV) strain, CYN07-dV, associated with a lethal outbreak in monkeys, used human signaling lymphocyte activation molecule as a receptor only poorly but readily adapted to use it following a P541S substitution in the hemagglutinin protein. Since CYN07-dV had an intrinsic ability to use human nectin-4, the adapted virus became able to use both human immune and epithelial cell receptors, as well as monkey and canine ones, suggesting that CDV can potentially infect humans.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Ryoji Yamaguchi
- Department of Veterinary Pathology, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | | | | | | | - Shigeru Morikawa
- Department of Virology 1,
- Department of Veterinary Science, National Institute of Infectious Diseases, Tokyo, Japan
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Moi ML, Omatsu T, Hirayama T, Nakamura S, Katakai Y, Yoshida T, Saito A, Tajima S, Ito M, Takasaki T, Akari H, Kurane I. Presence of Viral Genome in Urine and Development of Hematuria and Pathological Changes in Kidneys in Common Marmoset (Callithrix jacchus) after Inoculation with Dengue Virus. Pathogens 2013; 2:357-63. [PMID: 25437039 PMCID: PMC4235723 DOI: 10.3390/pathogens2020357] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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] [Received: 03/25/2013] [Revised: 04/27/2013] [Accepted: 05/08/2013] [Indexed: 11/29/2022] Open
Abstract
Common marmosets (Callithrix jacchus) developed high levels of viremia, clinical signs including fever, weight loss, a decrease in activity and hematuria upon inoculation with dengue virus (DENV). Presence of DENV genome in urine samples and pathological changes in kidneys were examined in the present study. Levels of DENV genome were determined in 228 urine samples from 20 primary DENV-inoculated marmosets and in 56 urine samples from four secondary DENV-inoculated marmosets. DENV genome was detected in 75% (15/20) of marmosets after primary DENV infection. No DENV genome was detected in urine samples from the marmosets with secondary infection with homologous DENV (0%, 0/4). Two marmosets demonstrated hematuria. Pathological analysis of the kidneys demonstrated non-suppressive interstitial nephritis with renal tubular regeneration. DENV antigen-positive cells were detected in kidneys. In human dengue virus infections, some patients present renal symptoms. The results indicate that marmosets recapitulate some aspects of the involvement of kidneys in human DENV infection, and suggest that marmosets are potentially useful for the studies of the pathogenesis of DENV infection, including kidneys.
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Affiliation(s)
- Meng Ling Moi
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Tsutomu Omatsu
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Takanori Hirayama
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Shinichiro Nakamura
- Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Shiga, 520-2192, Japan.
| | - Yuko Katakai
- National Institute of Biomedical Innovation, 1 Hachimandai, Tsukuba, Ibaraki, 305-0843, Japan.
| | - Tomoyuki Yoshida
- Primate Research Institute, Kyoto University, Inuyama, Aichi, 484-8506, Japan.
| | - Akatsuki Saito
- Primate Research Institute, Kyoto University, Inuyama, Aichi, 484-8506, Japan.
| | - Shigeru Tajima
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Mikako Ito
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Tomohiko Takasaki
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Hirofumi Akari
- Primate Research Institute, Kyoto University, Inuyama, Aichi, 484-8506, Japan.
| | - Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
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Kurane I, Shibasaki KI, Kotaki A, Hijioka Y, Takasaki T. The effect of precipitation on the transmission of Japanese encephalitis (JE) virus in nature: a complex effect on antibody-positive rate to JE virus in sentinel pigs. Int J Environ Res Public Health 2013; 10:1831-44. [PMID: 23644830 PMCID: PMC3709351 DOI: 10.3390/ijerph10051831] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 04/23/2013] [Accepted: 04/25/2013] [Indexed: 11/16/2022]
Abstract
Japanese encephalitis (JE) is one of the most important mosquito-borne viral diseases in Asia. Pigs are a natural host and the amplifier of JE virus. The sero-conversion rate to JE virus in sentinel pigs reflects the activity of JE virus in the region. We analyzed whether precipitation has any effect on the sero-conversion rate to JE virus in sentinel pigs. Linear regression analysis was performed to determine the correlations between the levels of precipitation and sero-conversion rates to JE virus, in the entire year and during summertime over the period of 32 years from 1969 to 2000. The levels of the annual and summertime precipitation demonstrated statistically significant positive correlations with sero-conversion rates for the whole of the country and for some regions in Japan. The levels of the summertime precipitation, on the other hand, demonstrated statistically significant inverse correlations with the sero-conversion rates in other regions. Further, the levels of precipitation during preceding 10-day periods from days 1-40 before blood collection showed inverse correlation with antibody-positive rates in some regions. The results indicate that the relationship between the annual and summertime precipitation, and the sero-conversion rate to JE virus is complex; both positive and inverse effects are demonstrated depending on the regions.
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Affiliation(s)
- Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjukuku, Tokyo 162-8640, Japan
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +81-3-5285-1111 (ext. 2007); Fax: +81-3-5285-1356
| | - Ken-ichi Shibasaki
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjukuku, Tokyo 162-8640, Japan; E-Mails: (K.S.); (A.K.); (T.T.)
| | - Akira Kotaki
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjukuku, Tokyo 162-8640, Japan; E-Mails: (K.S.); (A.K.); (T.T.)
| | - Yasuaki Hijioka
- Sustainable Social Systems Section, Center for Social and Environmental Systems Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba-City, Ibaraki 305-8506, Japan; E-Mail:
| | - Tomohiko Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjukuku, Tokyo 162-8640, Japan; E-Mails: (K.S.); (A.K.); (T.T.)
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Moi ML, Omatsu T, Tajima S, Lim CK, Kotaki A, Ikeda M, Harada F, Ito M, Saijo M, Kurane I, Takasaki T. Detection of dengue virus nonstructural protein 1 (NS1) by using ELISA as a useful laboratory diagnostic method for dengue virus infection of international travelers. J Travel Med 2013; 20:185-93. [PMID: 23577865 DOI: 10.1111/jtm.12018] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 11/30/2012] [Accepted: 12/05/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND Dengue virus ( DENV) nonstructural protein 1 ( NS1) has been used as a novel diagnostic marker during the early phase of DENV infection. METHODS Presence of NS1 antigen was examined using 336 serum samples obtained from 276 travelers returning to Japan from Asia, Central and South America, Pacific Islands, and Africa with dengue. Assay specificity was evaluated using 148 non-dengue samples. RESULTS Positive rates among four DENV serotypes were 68%-89%. NS1 antigen positive rates were at similar levels between primary infection and secondary infection. NS1 antigen positive rates were 88%-96% on days 1-5, 75%-100% on days 6-10, and 36-60% on ≥ day 11. Positive rates using real-time polymerase chain reaction (RT-PCR) were over 70% on days 1-5, but decreased thereafter. CONCLUSIONS The results indicate that NS1 antigen positive rates were higher than those of RT-PCR during longer period of early phase in DENV infection. Thus, NS1 antigen ELISA is a useful tool for confirming DENV infection in international travelers, when it is used in combination with anti-DENV IgM ELISA.
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Affiliation(s)
- Meng Ling Moi
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
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Fujii Y, Kitaura K, Matsutani T, Shirai K, Suzuki S, Takasaki T, Kumagai K, Kametani Y, Shiina T, Takabayashi S, Katoh H, Hamada Y, Kurane I, Suzuki R. Immune-related gene expression profile in laboratory common marmosets assessed by an accurate quantitative real-time PCR using selected reference genes. PLoS One 2013; 8:e56296. [PMID: 23451040 PMCID: PMC3581525 DOI: 10.1371/journal.pone.0056296] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 01/07/2013] [Indexed: 11/29/2022] Open
Abstract
The common marmoset (Callithrix jacchus) is considered a novel experimental animal model of non-human primates. However, due to antibody unavailability, immunological and pathological studies have not been adequately conducted in various disease models of common marmoset. Quantitative real-time PCR (qPCR) is a powerful tool to examine gene expression levels. Recent reports have shown that selection of internal reference housekeeping genes are required for accurate normalization of gene expression. To develop a reliable qPCR method in common marmoset, we used geNorm applets to evaluate the expression stability of eight candidate reference genes (GAPDH, ACTB, rRNA, B2M, UBC, HPRT, SDHA and TBP) in various tissues from laboratory common marmosets. geNorm analysis showed that GAPDH, ACTB, SDHA and TBP were generally ranked high in stability followed by UBC. In contrast, HPRT, rRNA and B2M exhibited lower expression stability than other genes in most tissues analyzed. Furthermore, by using the improved qPCR with selected reference genes, we analyzed the expression levels of CD antigens (CD3ε, CD4, CD8α and CD20) and cytokines (IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12β, IL-13, IFN-γ and TNF-α) in peripheral blood leukocytes and compared them between common marmosets and humans. The expression levels of CD4 and IL-4 were lower in common marmosets than in humans whereas those of IL-10, IL-12β and IFN-γ were higher in the common marmoset. The ratio of Th1-related gene expression level to that of Th2-related genes was inverted in common marmosets. We confirmed the inverted ratio of CD4 to CD8 in common marmosets by flow cytometric analysis. Therefore, the difference in Th1/Th2 balance between common marmosets and humans may affect host defense and/or disease susceptibility, which should be carefully considered when using common marmoset as an experimental model for biomedical research.
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Affiliation(s)
- Yoshiki Fujii
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kazutaka Kitaura
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Takaji Matsutani
- Laboratory of Immune Regulation, Wakayama Medical University, Osaka, Japan
| | - Kenji Shirai
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Satsuki Suzuki
- Section of Biological Science, Research Center for Odontology, Nippon Dental University, School of Life Dentistry, Tokyo, Japan
| | - Tomohiko Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kenichi Kumagai
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University, Kanagawa, Japan
| | - Yoshie Kametani
- Department of Immunology, Division of Basic Medical Science and Molecular Medicine, Tokai University School of Medicine, Kanagawa, Japan
| | - Takashi Shiina
- Department of Molecular Life Science, Division of Basic Medical Science and Molecular Medicine, Tokai University School of Medicine, Kanagawa, Japan
| | - Shuji Takabayashi
- Experimental Animals Institute, Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Hideki Katoh
- Experimental Animals Institute, Hamamatsu University School of Medicine, Shizuoka, Japan
- Laboratory of Animal Breeding and Genetics, Central Institute for Experimental Animals, Kawasaki, Japan
| | - Yoshiki Hamada
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University, Kanagawa, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Ryuji Suzuki
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan
- * E-mail:
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Yoshida T, Omatsu T, Saito A, Katakai Y, Iwasaki Y, Kurosawa T, Hamano M, Higashino A, Nakamura S, Takasaki T, Yasutomi Y, Kurane I, Akari H. Dynamics of cellular immune responses in the acute phase of dengue virus infection. Arch Virol 2013; 158:1209-20. [PMID: 23381396 DOI: 10.1007/s00705-013-1618-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 06/13/2012] [Accepted: 12/12/2012] [Indexed: 11/26/2022]
Abstract
In this study, we examined the dynamics of cellular immune responses in the acute phase of dengue virus (DENV) infection in a marmoset model. Here, we found that DENV infection in marmosets greatly induced responses of CD4/CD8 central memory T and NKT cells. Interestingly, the strength of the immune response was greater in animals infected with a dengue fever strain than in those infected with a dengue hemorrhagic fever strain of DENV. In contrast, when animals were re-challenged with the same DENV strain used for primary infection, the neutralizing antibody induced appeared to play a critical role in sterilizing inhibition against viral replication, resulting in strong but delayed responses of CD4/CD8 central memory T and NKT cells. The results in this study may help to better understand the dynamics of cellular and humoral immune responses in the control of DENV infection.
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Affiliation(s)
- Tomoyuki Yoshida
- Tsukuba Primate Research Center, National Institute of Biomedical Innovation, 1-1 Hachimandai, Tsukuba, Ibaraki 305-0843, Japan.
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Moi ML, Takasaki T, Saijo M, Kurane I. Dengue virus infection-enhancing activity of undiluted sera obtained from patients with secondary dengue virus infection. Trans R Soc Trop Med Hyg 2012; 107:51-8. [DOI: 10.1093/trstmh/trs007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Nakamichi K, Kishida S, Tanaka K, Suganuma A, Sano Y, Sano H, Kanda T, Maeda N, Kira JI, Itoh A, Kato N, Tomimoto H, Kurane I, Lim CK, Mizusawa H, Saijo M. Sequential changes in the non-coding control region sequences of JC polyomaviruses from the cerebrospinal fluid of patients with progressive multifocal leukoencephalopathy. Arch Virol 2012; 158:639-50. [PMID: 23138154 DOI: 10.1007/s00705-012-1532-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 10/01/2012] [Indexed: 11/28/2022]
Abstract
Progressive multifocal leukoencephalopathy (PML) is caused by JC polyomavirus (JCV) infection in the brain. JCV isolates from PML patients have variable mutations in the non-coding control region (NCCR) of the genome. This study was conducted to examine sequential changes in NCCR patterns of JCV isolates obtained from the cerebrospinal fluid (CSF) of PML patients. CSF specimens were collected from PML patients at different time points, the NCCR sequences were determined, and their compositions were assessed by computer-based analysis. In patients showing a marked increase in JCV load, the most frequent NCCR sequences in the follow-up specimens were different from those in the initial samples. In contrast, the dominant NCCRs in the CSF remained unaltered during the follow-up of individuals in whom the viral load decreased after therapeutic intervention. These data demonstrate that the majority of JCV variants emerge with the progression of PML and that these changes are suppressed when the viral load is decreased.
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Affiliation(s)
- Kazuo Nakamichi
- Department of Virology 1, National Institute of Infectious Diseases, Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
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Nakamichi K, Mizusawa H, Yamada M, Kishida S, Miura Y, Shimokawa T, Takasaki T, Lim CK, Kurane I, Saijo M. Characteristics of progressive multifocal leukoencephalopathy clarified through internet-assisted laboratory surveillance in Japan. BMC Neurol 2012; 12:121. [PMID: 23066763 PMCID: PMC3495800 DOI: 10.1186/1471-2377-12-121] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [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] [Received: 06/28/2012] [Accepted: 10/12/2012] [Indexed: 11/15/2022] Open
Abstract
Background Progressive multifocal leukoencephalopathy (PML), a rare but fatal demyelinating disease caused by JC virus (JCV), occurs mainly in immunocompromised patients. As PML develops in individuals with various underlying disorders sporadically and infrequently, a nationwide survey of PML is difficult. This study was conducted to elucidate the characteristics of PML in Japan through an internet-assisted laboratory surveillance program. Methods A diagnostic support system for PML was established using a real-time PCR assay of JCV DNA in cerebrospinal fluid (CSF), and requests for testing were received from clinicians via specialized websites. Medical histories of patients were collected through standardized questionnaires, and a database of CSF JCV loads and clinical information was created and analyzed. Results For 4 years from April 2007 to March 2011, CSF specimens from 419 patients were tested. Forty-eight individuals were found positive for JCV DNA in their CSF and were diagnosed with PML. PML primarily occurred not only in HIV-positive patients (33.3%) but also in patients with hematologic disorders after receiving stem cell transplantation, chemotherapy, and/or immunosuppressive treatment (39.6%). The frequencies of PML cases among the subjects in these two categories were 20.3% and 23.5%, respectively. Although no significant features were observed with respect to CSF JCV loads in PML patients with an HIV infection or hematologic disorder, males were predominant in both groups (100% and 89.5%, respectively). The proportion of PML cases with autoimmune disorders (6.3%) or solid-organ transplants (2.1%) was smaller than those with HIV infection or hematologic disorders, probably due to the limited availability of therapeutic monoclonal antibodies and transplantation from brain dead donors. Conclusions The results suggest that the internet-assisted laboratory surveillance program might be a useful strategy for collecting precise real-time information on PML on a national level. The current database provides important background information for the diagnosis and treatment of patients with risk factors for PML.
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Affiliation(s)
- Kazuo Nakamichi
- Department of Virology 1, National Institute of Infectious Diseases, Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
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Yamaguchi Y, Nukui Y, Kotaki A, Sawabe K, Saijo M, Watanabe H, Kurane I, Takasaki T, Tajima S. Characterization of a serine-to-asparagine substitution at position 123 in the Japanese encephalitis virus E protein. J Gen Virol 2012; 94:90-96. [PMID: 23052392 DOI: 10.1099/vir.0.044925-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Amino acid position 123 in the E protein of Japanese encephalitis virus (JEV) determines viral growth properties and pathogenicity. The majority of JEV strains have a serine residue at this position (E(123S)); however, JEV with an asparagine residue (E(123N)) has also been isolated. To compare the growth properties and pathogenicity of E(123S) and E(123N) JEV, we produced recombinant JEV with a serine-to-asparagine substitution at position 123 (rJEV-Mie41-E(S123N)) in the E(123S)-type strain Mie/41/2002 background. The growth rate of rJEV-Mie41-E(S123N) was similar to that of Mie/41/2002 in mammalian and mosquito cell lines. Mouse challenge experiments showed that there was only a slight difference in neuroinvasiveness between the parent strain (Mie/41/2002) and rJEV-Mie41-E(S123N). Thus, our results indicate that the Ser-to-Asn substitution in the JEV E protein has weak impact on viral growth properties in vitro or on pathogenicity in vivo.
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Affiliation(s)
- Yukie Yamaguchi
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan.,Department of Pathology, Immunology and Microbiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Yoko Nukui
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan.,Department of Infection Control and Prevention, University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo, Tokyo 113-8655, Japan
| | - Akira Kotaki
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Kyoko Sawabe
- Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Haruo Watanabe
- Department of Pathology, Immunology and Microbiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.,National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Ichiro Kurane
- National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Tomohiko Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | - Shigeru Tajima
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
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Kitaura K, Fujii Y, Matsutani T, Shirai K, Suzuki S, Takasaki T, Shimada S, Kametani Y, Shiina T, Takabayashi S, Katoh H, Ogasawara K, Kurane I, Suzuki R. A new method for quantitative analysis of the T cell receptor V region repertoires in healthy common marmosets by microplate hybridization assay. J Immunol Methods 2012; 384:81-91. [PMID: 22841578 DOI: 10.1016/j.jim.2012.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 07/11/2012] [Accepted: 07/18/2012] [Indexed: 10/28/2022]
Abstract
The common marmoset, Callithrix jacchus, is one of the smallest primates and is increasingly used for an experimental nonhuman primate model in many research fields. Analysis of T cell receptor (TCR) repertoires is a powerful tool to investigate T cell immunity in terms of antigen specificity and variability of TCR expression. However, monoclonal antibodies specific for many TCR Vα or Vβ chains have not been created. We have recently identified a large number of TCRα chain variable (TRAV) and TCRβ chain variable (TRBV) sequences from a cDNA library of common marmosets. The purpose of this study is to develop a new method for analysis of TCR repertoires in the common marmoset using this sequence information. This method is based on a microplate hybridization technique using 32 TRAV-specific and 32 TRBV-specific oligoprobes following an adaptor-ligation PCR. This enables the easy quantitation of the respective TRAV and TRBV expression levels. No cross-hybridization among specific-oligoprobes and very low variances in repeated measures of the same samples was found, demonstrating high specificity and reproducibility. Furthermore, this method was validated by an antihuman Vβ23 antibody which specifically bound to marmoset Vβ23. Using this method, we analyzed TCR repertoires from various tissue samples (PBMCs, spleen, lymph node and thymus) and isolated T cell subpopulations (CD4+CD8+, CD4+CD8− and CD4−CD8+) from the thymus of 10 common marmosets. Neither tissue-specific nor T cell subpopulation-specific differences was found in TRAV and TRBV repertoires. These results suggest that, unlike mice, TCR repertoires in the common marmoset are not affected by endogenous superantigens and are conserved among individuals, among tissues, and among T cell subpopulations. Thus, TCR repertoire analysis with high specificity and reproducibility is a very useful technique, with the potential to replace flow cytometric analysis using a panel of TRV-specific antibodies, many of which remain unavailable.
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Affiliation(s)
- Kazutaka Kitaura
- Department of Rheumatology and Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihra National Hospital, National Hospital Organization, Kanagawa, Japan
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Omatsu T, Moi ML, Takasaki T, Nakamura S, Katakai Y, Tajima S, Ito M, Yoshida T, Saito A, Akari H, Kurane I. Changes in hematological and serum biochemical parameters in common marmosets (Callithrix jacchus) after inoculation with dengue virus. J Med Primatol 2012; 41:289-96. [PMID: 22775469 DOI: 10.1111/j.1600-0684.2012.00552.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Marmosets are susceptible to dengue virus (DENV) infection. However, blood parameter data and clinical signs of DENV-infected marmosets are limited. METHODS Blood hematological and serum biochemical values were obtained from twelve DENV-inoculated and four mock-infected marmosets. Additionally, body temperature and activity level were determined. RESULTS Five DENV-inoculated marmosets demonstrated thrombocytopenia, nine demonstrated leucopenia, and five demonstrated an increase in the levels of AST, ALT, LDH, and BUN. Additionally, seven DENV-inoculated marmosets demonstrated clinical signs including fever and decreases in activity. None of the four mock-inoculated marmosets demonstrated changes in either hematological or biochemical parameters. CONCLUSIONS Marmosets inoculated with DENV exhibited clinical signs and changes in hematological and biochemical parameters. The results suggest that blood parameter data and clinical signs could potentially be useful markers for understanding the progress of DENV infection in studies using marmosets.
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Affiliation(s)
- Tsutomu Omatsu
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
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Sayama Y, Demetria C, Saito M, Azul RR, Taniguchi S, Fukushi S, Yoshikawa T, Iizuka I, Mizutani T, Kurane I, Malbas FF, Lupisan S, Catbagan DP, Animas SB, Morales RG, Lopez EL, Dazo KRC, Cruz MS, Olveda R, Saijo M, Oshitani H, Morikawa S. A seroepidemiologic study of Reston ebolavirus in swine in the Philippines. BMC Vet Res 2012; 8:82. [PMID: 22709971 PMCID: PMC3433389 DOI: 10.1186/1746-6148-8-82] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [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] [Received: 02/23/2012] [Accepted: 06/12/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ebola viruses cause viral hemorrhagic fever in humans and non-human primates and are endemic in Africa. Reston ebolavirus (REBOV) has caused several epizootics in cynomolgus monkeys (Macaca fascicularis) but is not associated with any human disease. In late 2008, REBOV infections were identified in swine for the first time in the Philippines. METHODS A total of 215 swine sera collected at two REBOV-affected farms in 2008, in Pangasinan and Bulacan, were tested for the presence of REBOV-specific antibodies using multiple serodiagnosis systems. A total of 98 swine sera collected in a non-epizootic region, Tarlac, were also tested to clarify the prevalence of REBOV infection in the general swine population in the Philippines. RESULTS Some 70 % of swine sera at the affected farms were positive for REBOV antibodies in the multiple serodiagnosis systems. On the other hand, none of the swine sera collected in Tarlac showed positive reactions in any of the diagnosis systems. CONCLUSIONS The high prevalence of REBOV infection in swine in the affected farms in 2008 suggests that swine is susceptible for REBOV infection. The multiple serological assays used in the study are thought to be useful for future surveillance of REOBV infection in swine in the Philippines.
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Affiliation(s)
- Yusuke Sayama
- Department of Virology 1, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama, Tokyo, 208-0011, Japan
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Moi ML, Lim CK, Chua KB, Takasaki T, Kurane I. Dengue virus infection-enhancing activity in serum samples with neutralizing activity as determined by using FcγR-expressing cells. PLoS Negl Trop Dis 2012; 6:e1536. [PMID: 22389741 PMCID: PMC3289619 DOI: 10.1371/journal.pntd.0001536] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 01/05/2012] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Progress in dengue vaccine development has been hampered by limited understanding of protective immunity against dengue virus infection. Conventional neutralizing antibody titration assays that use FcγR-negative cells do not consider possible infection-enhancement activity. We reasoned that as FcγR-expressing cells are the major target cells of dengue virus, neutralizing antibody titration assays using FcγR-expressing cells that determine the sum of neutralizing and infection-enhancing activity, may better reflect the biological properties of antibodies in vivo. METHODS AND FINDINGS We evaluated serum samples from 80 residents of a dengue endemic country, Malaysia, for neutralizing activity, and infection-enhancing activity at 1∶10 serum dilution by using FcγR-negative BHK cells and FcγR-expressing BHK cells. The serum samples consisted of a panel of patients with acute DENV infection (31%, 25/80) and a panel of donors without acute DENV infection (69%, 55/80). A high proportion of the tested serum samples (75%, 60/80) demonstrated DENV neutralizing activity (PRNT(50)≥10) and infection-enhancing activity. Eleven of 18 serum samples from patients with acute secondary DENV infection demonstrated neutralizing activity to the infecting serotype determined by using FcγR-negative BHK cells (PRNT(50)≥10), but not when determined by using FcγR-expressing cells. CONCLUSION Human serum samples with low neutralizing activity determined by using FcγR-negative cells showed DENV infection-enhancing activity using FcγR-expressing cells, whereas those with high neutralizing activity determined by using FcγR-negative cells demonstrate low or no infection-enhancing activity using FcγR-expressing cells. The results suggest an inverse relationship between neutralizing antibody titer and infection-enhancing activity, and that neutralizing activity determined by using FcγR-expressing cells, and not the activity determined by using FcγR-negative cells, may better reflect protection to DENV infection in vivo.
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Affiliation(s)
- Meng Ling Moi
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Chang-Kweng Lim
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kaw Bing Chua
- National Public Health Laboratory, Ministry of Health, Sungai Buloh, Selangor, Malaysia
| | - Tomohiko Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
| | - Ichiro Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan
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