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Harima H, Qiu Y, Yamagishi J, Kajihara M, Changula K, Okuya K, Isono M, Yamaguchi T, Ogawa H, Nao N, Sasaki M, Simulundu E, Mweene AS, Sawa H, Ishihara K, Hang'ombe BM, Takada A. Surveillance, Isolation, and Genetic Characterization of Bat Herpesviruses in Zambia. Viruses 2023; 15:1369. [PMID: 37376669 DOI: 10.3390/v15061369] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/12/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Bats are of significant interest as reservoirs for various zoonotic viruses with high diversity. During the past two decades, many herpesviruses have been identified in various bats worldwide by genetic approaches, whereas there have been few reports on the isolation of infectious herpesviruses. Herein, we report the prevalence of herpesvirus infection of bats captured in Zambia and genetic characterization of novel gammaherpesviruses isolated from striped leaf-nosed bats (Macronycteris vittatus). By our PCR screening, herpesvirus DNA polymerase (DPOL) genes were detected in 29.2% (7/24) of Egyptian fruit bats (Rousettus aegyptiacus), 78.1% (82/105) of Macronycteris vittatus, and one Sundevall's roundleaf bat (Hipposideros caffer) in Zambia. Phylogenetic analyses of the detected partial DPOL genes revealed that the Zambian bat herpesviruses were divided into seven betaherpesvirus groups and five gammaherpesvirus groups. Two infectious strains of a novel gammaherpesvirus, tentatively named Macronycteris gammaherpesvirus 1 (MaGHV1), were successfully isolated from Macronycteris vittatus bats, and their complete genomes were sequenced. The genome of MaGHV1 encoded 79 open reading frames, and phylogenic analyses of the DNA polymerase and glycoprotein B demonstrated that MaGHV1 formed an independent lineage sharing a common origin with other bat-derived gammaherpesviruses. Our findings provide new information regarding the genetic diversity of herpesviruses maintained in African bats.
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Affiliation(s)
- Hayato Harima
- Laboratory of Veterinary Public Health, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
| | - Yongjin Qiu
- Management Department of Biosafety, Laboratory Animal and Pathogen Bank, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
- Department of Virology-I, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Junya Yamagishi
- Division of Collaboration and Education, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
| | - Masahiro Kajihara
- Division of International Research Promotion, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
| | - Katendi Changula
- Department of Para-Clinical Studies, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
| | - Kosuke Okuya
- Department of Pathogenetic and Preventive Veterinary Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
| | - Mao Isono
- Division of Global Epidemiology, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
| | - Tomoyuki Yamaguchi
- Department of Oral Microbiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Hirohito Ogawa
- Department of Virology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Naganori Nao
- Division of International Research Promotion, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
- One Health Research Center, Hokkaido University, Sapporo 060-0818, Japan
| | - Michihito Sasaki
- Division of Molecular Pathobiology, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
| | - Edgar Simulundu
- Department of Disease Control, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Macha Research Trust, Choma 20100, Zambia
| | - Aaron S Mweene
- Department of Disease Control, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
| | - Hirofumi Sawa
- One Health Research Center, Hokkaido University, Sapporo 060-0818, Japan
- Department of Disease Control, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Institute for Vaccine Research and Development, Hokkaido University, Sapporo 001-0021, Japan
| | - Kanako Ishihara
- Laboratory of Veterinary Public Health, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
| | - Bernard M Hang'ombe
- Department of Para-Clinical Studies, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
| | - Ayato Takada
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
- Division of Global Epidemiology, International Institute for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
- One Health Research Center, Hokkaido University, Sapporo 060-0818, Japan
- Department of Disease Control, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
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An JS, Tsuji K, Onuma H, Araya N, Isono M, Hoshino T, Inomata K, Hino J, Miyazato M, Hosoda H, Kangawa K, Nakagawa Y, Katagiri H, Miyatake K, Sekiya I, Muneta T, Koga H. Inhibition of fibrotic changes in infrapatellar fat pad alleviates persistent pain and articular cartilage degeneration in monoiodoacetic acid-induced rat arthritis model. Osteoarthritis Cartilage 2021; 29:380-388. [PMID: 33388431 DOI: 10.1016/j.joca.2020.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 12/05/2020] [Accepted: 12/15/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE We have reported that fibrotic changes in infrapatellar fat pad (IFP) after acute joint inflammation are closely associated with persistent pain in rats. In this study, to examine the effects of anti-fibrotic treatment on persistent pain, we used C-type natriuretic peptides (CNP) at the recovery phase after acute joint inflammation. DESIGN Thirty-two male Wistar rats were used in this study. Monoiodoacetic acid (MIA) was injected intra-articularly to induce IFP fibrosis and persistent pain. CNP was injected after acute inflammatory phase in the same knee joint. Time-course pain-avoidance behavior tests and histological analyses were performed to examine the effects of CNP. RESULTS Histological evaluations indicated that intra-articular injection of CNP inhibited fibrotic changes in IFP after acute inflammation. Incapacitance tests indicated that MIA injection into rat knee joint quickly decreased the percent weight on ipsilateral limb. In the vehicle group, the decrease was maintained up to day 28, suggesting that pain persistence occurred after acute inflammation (Day 0/Day 28, Est Dif -8.15, CI -10.78∼-5.53, Linear mixed-effect model). In contrast, the pain was alleviated in the CNP group after day 14 (Day0/Day 14, -0.51, -2.62-1.59). In addition, we observed significant improvement in the degree of articular cartilage degeneration at day 14 in the CNP group (OARSI score: vehicle 16.14 ± 4.37 vs CNP 6.87 ± 3.44, P < 0.01; Wilcoxon rank sum test). CONCLUSION Fibrotic changes in IFP may play important roles in both persistent pain and articular cartilage degeneration.
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Affiliation(s)
- J-S An
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - K Tsuji
- Department of Cartilage Regeneration, Tokyo Medical and Dental University, Tokyo, Japan.
| | - H Onuma
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - N Araya
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - M Isono
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - T Hoshino
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - K Inomata
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - J Hino
- Department of Biochemistry, Japan; National Cerebral and Cardiovascular Center Research Institute, Japan.
| | - M Miyazato
- Department of Biochemistry, Japan; National Cerebral and Cardiovascular Center Research Institute, Japan.
| | - H Hosoda
- Department of Regenerative Medicine and Tissue Engineering, Japan; National Cerebral and Cardiovascular Center Research Institute, Japan.
| | - K Kangawa
- National Cerebral and Cardiovascular Center Research Institute, Japan.
| | - Y Nakagawa
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan; Department of Cartilage Regeneration, Tokyo Medical and Dental University, Tokyo, Japan.
| | - H Katagiri
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - K Miyatake
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - I Sekiya
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - T Muneta
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - H Koga
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
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Isono M, Furuyama W, Kuroda M, Kondoh T, Igarashi M, Kajihara M, Yoshida R, Manzoor R, Okuya K, Miyamoto H, Feldmann H, Marzi A, Sakaitani M, Nanbo A, Takada A. A biaryl sulfonamide derivative as a novel inhibitor of filovirus infection. Antiviral Res 2020; 183:104932. [PMID: 32946918 PMCID: PMC11075116 DOI: 10.1016/j.antiviral.2020.104932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 09/04/2020] [Accepted: 09/09/2020] [Indexed: 01/11/2023]
Abstract
Ebolaviruses and marburgviruses, members of the family Filoviridae, are known to cause fatal diseases often associated with hemorrhagic fever. Recent outbreaks of Ebola virus disease in West African countries and the Democratic Republic of the Congo have made clear the urgent need for the development of therapeutics and vaccines against filoviruses. Using replication-incompetent vesicular stomatitis virus (VSV) pseudotyped with the Ebola virus (EBOV) envelope glycoprotein (GP), we screened a chemical compound library to obtain new drug candidates that inhibit filoviral entry into target cells. We discovered a biaryl sulfonamide derivative that suppressed in vitro infection mediated by GPs derived from all known human-pathogenic filoviruses. To determine the inhibitory mechanism of the compound, we monitored each entry step (attachment, internalization, and membrane fusion) using lipophilic tracer-labeled ebolavirus-like particles and found that the compound efficiently blocked fusion between the viral envelope and the endosomal membrane during cellular entry. However, the compound did not block the interaction of GP with the Niemann-Pick C1 protein, which is believed to be the receptor of filoviruses. Using replication-competent VSVs pseudotyped with EBOV GP, we selected escape mutants and identified two EBOV GP amino acid residues (positions 47 and 66) important for the interaction with this compound. Interestingly, these amino acid residues were located at the base region of the GP trimer, suggesting that the compound might interfere with the GP conformational change required for membrane fusion. These results suggest that this biaryl sulfonamide derivative is a novel fusion inhibitor and a possible drug candidate for the development of a pan-filovirus therapeutic.
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Affiliation(s)
- Mao Isono
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Wakako Furuyama
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Makoto Kuroda
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Tatsunari Kondoh
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Manabu Igarashi
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan; Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan
| | - Masahiro Kajihara
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Reiko Yoshida
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Rashid Manzoor
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Kosuke Okuya
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Hiroko Miyamoto
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | | | - Asuka Nanbo
- The National Research Center for the Control and Prevention of Infectious Diseases, Nagasaki University, Nagasaki, Japan
| | - Ayato Takada
- Division of Global Epidemiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo, Japan; Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan; Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia.
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4
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Harima H, Sasaki M, Kajihara M, Gonzalez G, Simulundu E, Bwalya EC, Qiu Y, Okuya K, Isono M, Orba Y, Takada A, Hang'ombe BM, Mweene AS, Sawa H. Characterization of mammalian orthoreoviruses isolated from faeces of pigs in Zambia. J Gen Virol 2020; 101:1027-1036. [PMID: 32706330 DOI: 10.1099/jgv.0.001476] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Mammalian orthoreovirus (MRV) has been identified in humans, livestock and wild animals; this wide host range allows individual MRV to transmit into multiple species. Although several interspecies transmission and genetic reassortment events of MRVs among humans, livestock and wildlife have been reported, the genetic diversity and geographic distribution of MRVs in Africa are poorly understood. In this study, we report the first isolation and characterization of MRVs circulating in a pig population in Zambia. In our screening, MRV genomes were detected in 19.7 % (29/147) of faecal samples collected from pigs by reverse transcription PCR. Three infectious MRV strains (MRV-85, MRV-96 and MRV-117) were successfully isolated, and their complete genomes were sequenced. Recombination analyses based on the complete genome sequences of the isolated MRVs demonstrated that MRV-96 shared the S3 segment with a different MRV isolated from bats, and that the L1 and M3 segments of MRV-117 originated from bat and human MRVs, respectively. Our results suggest that the isolated MRVs emerged through genetic reassortment events with interspecies transmission. Given the lack of information regarding MRVs in Africa, further surveillance of MRVs circulating among humans, domestic animals and wildlife is required to assess potential risk for humans and animals.
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Affiliation(s)
- Hayato Harima
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Michihito Sasaki
- Division of Molecular Pathobiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan
| | - Masahiro Kajihara
- Division of Global Epidemiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan.,Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Gabriel Gonzalez
- Division of Bioinformatics, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan
| | - Edgar Simulundu
- Department of Disease Control, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Eugene C Bwalya
- Department of Clinical Studies, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Yongjin Qiu
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Kosuke Okuya
- Division of Global Epidemiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan
| | - Mao Isono
- Division of Global Epidemiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan
| | - Yasuko Orba
- Division of Molecular Pathobiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan
| | - Ayato Takada
- Division of Global Epidemiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan.,Department of Disease Control, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia.,Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University Kita-ku, Sapporo, 001-0020, Japan.,Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Bernard M Hang'ombe
- Department of Para-clinical Studies, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia.,Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Aaron S Mweene
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia.,Department of Disease Control, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
| | - Hirofumi Sawa
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University Kita-ku, Sapporo, 001-0020, Japan.,Department of Disease Control, School of Veterinary Medicine, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia.,Global Virus Network, Baltimore, Maryland, 21201, 725 West Lombard St, Room S413, Baltimore, USA.,Division of Molecular Pathobiology, Hokkaido University, Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo, 001-0020, Japan.,Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, PO Box 32379, Lusaka, 10101, Zambia
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Harima H, Kajihara M, Simulundu E, Bwalya E, Qiu Y, Isono M, Okuya K, Gonzalez G, Yamagishi J, Hang’ombe BM, Sawa H, Mweene AS, Takada A. Genetic and Biological Diversity of Porcine Sapeloviruses Prevailing in Zambia. Viruses 2020; 12:v12020180. [PMID: 32033383 PMCID: PMC7077239 DOI: 10.3390/v12020180] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/30/2020] [Accepted: 02/03/2020] [Indexed: 01/07/2023] Open
Abstract
Porcine sapelovirus (PSV) has been detected worldwide in pig populations. Although PSV causes various symptoms such as encephalomyelitis, diarrhea, and pneumonia in pigs, the economic impact of PSV infection remains to be determined. However, information on the distribution and genetic diversity of PSV is quite limited, particularly in Africa. In this study, we investigated the prevalence of PSV infection in Zambia and characterized the isolated PSVs genetically and biologically. We screened 147 fecal samples collected in 2018 and found that the prevalences of PSV infection in suckling pigs and fattening pigs were high (36.2% and 94.0%, respectively). Phylogenetic analyses revealed that the Zambian PSVs were divided into three different lineages (Lineages 1–3) in the clade consisting of Chinese strains. The Zambian PSVs belonging to Lineages 2 and 3 replicated more efficiently than those belonging to Lineage 1 in Vero E6 and BHK cells. Bioinformatic analyses revealed that genetic recombination events had occurred and the recombination breakpoints were located in the L and 2A genes. Our results indicated that at least two biologically distinct PSVs could be circulating in the Zambian pig population and that genetic recombination played a role in the evolution of PSVs.
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Affiliation(s)
- Hayato Harima
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (H.H.); (Y.Q.)
| | - Masahiro Kajihara
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (H.H.); (Y.Q.)
- Correspondence: (M.K.); (A.T.); Tel.: +81-11-706-7327 (M.K.); +81-11-706-9502 (A.T.)
| | - Edgar Simulundu
- Department of Disease Control, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (E.S.); (H.S.); (A.S.M.)
| | - Eugene Bwalya
- Department of Clinical Studies, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia;
| | - Yongjin Qiu
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (H.H.); (Y.Q.)
| | - Mao Isono
- Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo 001-0020, Japan; (M.I.); (K.O.)
| | - Kosuke Okuya
- Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo 001-0020, Japan; (M.I.); (K.O.)
| | - Gabriel Gonzalez
- Division of Bioinformatics, Hokkaido University Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo 001-0020, Japan;
| | - Junya Yamagishi
- Division of Collaboration and Education, Hokkaido University Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo 001-0020, Japan;
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University Kita-ku, Sapporo 001-0020, Japan
| | - Bernard M. Hang’ombe
- Department of Para-Clinical Studies, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia;
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
| | - Hirofumi Sawa
- Department of Disease Control, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (E.S.); (H.S.); (A.S.M.)
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University Kita-ku, Sapporo 001-0020, Japan
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Division of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo 001-0020, Japan
- Global Virus Network, 725 West Lombard St, Room S413, Baltimore, MD 21201, USA
| | - Aaron S. Mweene
- Department of Disease Control, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (E.S.); (H.S.); (A.S.M.)
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
| | - Ayato Takada
- Department of Disease Control, School of Veterinary Medicine, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia; (E.S.); (H.S.); (A.S.M.)
- Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control, N20 W10, Kita-ku, Sapporo 001-0020, Japan; (M.I.); (K.O.)
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University Kita-ku, Sapporo 001-0020, Japan
- Africa Center of Excellence for Infectious Diseases of Humans and Animals, the University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
- Correspondence: (M.K.); (A.T.); Tel.: +81-11-706-7327 (M.K.); +81-11-706-9502 (A.T.)
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Kajihara M, Hang'ombe BM, Changula K, Harima H, Isono M, Okuya K, Yoshida R, Mori-Kajihara A, Eto Y, Orba Y, Ogawa H, Qiu Y, Sawa H, Simulundu E, Mwizabi D, Munyeme M, Squarre D, Mukonka V, Mweene A, Takada A. Marburgvirus in Egyptian Fruit Bats, Zambia. Emerg Infect Dis 2019; 25:1577-1580. [PMID: 31146800 PMCID: PMC6649326 DOI: 10.3201/eid2508.190268] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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: 11/25/2022] Open
Abstract
We detected Marburg virus genome in Egyptian fruit bats (Rousettus aegyptiacus) captured in Zambia in September 2018. The virus was closely related phylogenetically to the viruses that previously caused Marburg outbreaks in the Democratic Republic of the Congo. This finding demonstrates that Zambia is at risk for Marburg virus disease.
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Inui S, Ueda Y, Ono S, Ohira S, Isono M, Nitta Y, Murata S, Miyazaki M, Teshima T. EP-1747 In vivo dosimetry with electronic portal imaging device in VMAT for prostate cancer. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32167-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sato H, Niimi A, Yasuhara T, Isono M, Permata T, Sekine R, Oike T, Nuryadi E, Kakoti S, Yoshimoto Y, Held K, Suzuki Y, Kono K, Miyagawa K, Nakano T, Shibata A. Molecular Mechanism of PD-L1 Upregulation in Cancer Cells after X-Ray Irradiation. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Waza M, Hayashi Y, Sakurai T, Harada N, Nishida H, Isono M, Oku Y. Efficacy of interferential currents stimulation on post-stroke dysphagia: A case control study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Miyazaki M, Ueda Y, Oohira S, Tsujii K, Isono M, Masaoka A, Inui S, Teshima T. Planning Study for Esophageal Cancer: A Dosimetric Comparison of Conformal Radiation Therapy, VMAT, and Hybrid-VMAT. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tsujii K, Ueda Y, Isono M, Miyazaki M, Teshima T. Dosimetric Impact of Rotational Setup Errors for Cervical Cancer Patients With Postoperative Volumetric Modulated Arc Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.2141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Isono M, Murata K, Ohta F, Yoshida A, Ishida O. High Resolution Computed Tomography of Auditory Ossicles. Acta Radiol 2016. [DOI: 10.1177/028418519003100105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Auditory ossicular sections were scanned at section thicknesses (mm)/section interspaces (mm) of 1.5/1.5 (61 patients), 1.0/1.0 (13 patients) or 1.5/1.0 (33 patients). At any type of section thickness/interspace, the malleal and incudal structures were observed with almost equal frequency. The region of the incudostapedial joint and each component part of the stapes were shown more frequently at a section interspace of 1.0 mm than at 1.5 mm. The visualization frequency of each auditory ossicular component on two or more serial sections was investigated. At a section thickness/section interspace of 1.5/1.5, the visualization rates were low except for large components such as the head of the malleus and the body of the incus, but at a slice interspace of 1.0 mm, they were high for most components of the auditory ossicles.
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Hirano Y, Hirabara S, Isono M, Ishiguro N, Kojima T. FRI0152 Relationship between Biological DMARDs Treatment and Complications after Surgical Treatment in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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14
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Sato A, Asano T, Isono M, Okubo K, Asano T. Ritonavir interacts with ixazomib synergistically to cause ubiquitinated protein accumulation and endoplasmic reticulum stress in bladder cancer cells. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61435-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Hirano Y, Kanayama Y, Isono M, Ishiguro N, Kojima T. OP0105 The Predictors for 12 Months Efficacy of Denosumab, An anti-RANKL Antibody, on Osteoporosis in Patients with Rheumatoid Arthritis from Multicenter Study (TBCR-Bone). Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hirano Y, Isono M, Fukui J, Hasegawa J, Ishiguro N, Kojima T. THU0489 Daily Teriparatide Treatment after Bisphosphonate Therapy in Osteoporosis of Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hirano Y, Hirabara S, Isono M, Oishi Y, Ishiguro N, Kojima T. AB0379 Tapering or Stopping of Methotrexate in Non-Tumor Necrosis Factor Therapy (Tocilizumab and Abatacept) in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Miyazaki M, Ueda Y, Ohira S, Tsujii K, Isono M, Masaoka A, Teshima T. OC-0269: Comparison of dosimetric parameters of two techniques with VMAT for head and neck cancers. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)31518-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hirano Y, Hirabara S, Isono M, Oishi Y, Kojima T, Ishiguro N. SAT0138 Analysis of Treatment Retention Rate of Biologics Therapy in Patients with Rheumatoid Arthritis – A Single Center Cohort Study. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Isono M, Hirano Y, Hirabara S. OP0290 Influence of Diabetes Mellitus on Drug Survival and Treatment Efficacy of Biologics Therapy in Rheumatoid Arthritis Patients. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hirano Y, Hirabara S, Isono M, Oishi Y, Kojima T, Ishiguro N. FRI0287 Daily Teriparatide Treatment for Two Years on Osteoporosis in Patients with Rheumatoid Arthritis – Impact of Concomitant Drugs (Prednisolone and Biologics) on Effects of Teriparatide. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hirano Y, Hirabara S, Isono M, Oishi Y, Kojima T, Ishiguro N. AB0488 Influences of 2-Year Tocilizumab Therapy on Disease Activity, Quality of Life, Prevention of Joint Damage and Reduction of Concomitant Drugs (Prednisolone and Methotrexate) in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hashimoto M, Oohira S, Ueda Y, Miyazaki M, Isono M, Masaoka A, Takashina M, Koizumi M, Teshima T. SU-E-T-437: Four-Dimensional Treatment Planning for Lung VMAT-SBRT. Med Phys 2015. [DOI: 10.1118/1.4924798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Ueda Y, Hirose A, Oohira S, Isono M, Tsujii K, Miyazaki M, Kawaguchi Y, Konishi K, Teshima T. SU-E-T-68: A Quality Assurance System with a Web Camera for High Dose Rate Brachytherapy. Med Phys 2015. [DOI: 10.1118/1.4924429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Kuroda K, Asakuma J, Asano T, Horiguchi A, Isono M, Tsujita Y, Sato A, Seguchi K, Ito K, Asano T. Clinical significance of p21-activated kinase 1 expression level in patients with upper urinary tract urothelial carcinoma. Jpn J Clin Oncol 2014; 45:103-10. [DOI: 10.1093/jjco/hyu163] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Oohira S, Ueda Y, Nishiyama K, Miyazaki M, Isono M, Katsutomo T, Takashina M, Koizumi M, Kawanabe K, Teruki T. Couch-Height Based Patient Setup for Abdominal Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Okano N, Oike T, Saitoh J, Shirai K, Kiyono T, Enari M, Isono M, Torikai K, Ohno T, Nakano T. In Vitro Determination of the Relative Biological Effectiveness of Carbon Ion Beam Irradiation in Cells Derived From Human Normal Lung Tissues. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Suzuki Y, Yoshimoto Y, Oike T, Okonogi N, Ando K, Sato H, Noda S, Isono M, Mimura K, Kono K, Nakano T. Carbon-Ion Beam and X-Ray Irradiation Increase a Release of an Immune Mediator Protein High Mobility Group Box 1 (HMGB1) in Various Human Cancer Cell Lines. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Isono M, Sato A, Asano T, Ito K, Asano T. 770: Ritonavir interacts with belinostat to cause endoplasmic reticulum stress and histone acetylation synergistically in renal cancer cells. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50675-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sato A, Asano T, Isono M, Ito K, Asano T. 767: Ubiquitinated protein accumulation: A novel approach to treating bladder cancer. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50672-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Eguchi Y, Nakae H, Furuya T, Isono M, Kishi Y, Yoshioka T. Plasma filtration with dialysis (plasma diafiltration) in critically ill patients with acute liver failure. Crit Care 2014. [PMCID: PMC4069413 DOI: 10.1186/cc13589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Delawer F, Isono M, Ueki H, Zhuben M, Zafari M, Seddiq M, Habib H, Ayoubi M. Management of paediatric tuberculosis in provincial and district hospitals in Afghanistan. East Mediterr Health J 2013. [DOI: 10.26719/2013.19.8.698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Delawer FM, Isono M, Ueki H, Zhuben M, Zafari M, Seddiq MK, Habib H, Ayoubi MK. Management of paediatric tuberculosis in provincial and district hospitals in Afghanistan. East Mediterr Health J 2013; 19:698-703. [PMID: 24975354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 04/08/2012] [Indexed: 06/03/2023]
Abstract
Case detection, diagnosis and treatment of tuberculosis 1 B) in children are challenging issues vorldwide. This study in Afghanistan aimed to evaluate paediatric TB case management, including contact investigation, at health facilities where all diagnostic processes were available. In 7 out of 8 regions of the country 1 province was selected. Documents used for management of paediatric TB cases were reviewed in 15 distinct hospitals and 8 provincial hospitals in the selected provinces. The key issues which emerged were: a low suspect rate among total outpatients (0.4%) and a very low suspect rate among children aged < 5 years; low performance of suspect management (68.5% suspects received further examinations); low utilization of other diagnostic methods; a high early defaulter rate (14.0%); and insufficient coverage of contact management (74.0%). This survey indicated that the Afghanistan national TB programme needs to develop plans to improve the quality of diagnosis, suspect management and contact management in paediatric TB cases.
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Abstract
The A7 cell line is an astrocyte-like cell immortalized by SV40 large T antigen, using retroviral-mediated gene transfer. These cells were transplanted into rat brains, and the graft-host interaction was investigated immunohistochemically. The A7 cells survived focally 2, 6 and 8 weeks after transplantation and retained the immunocytochemical properties observed in vitro. No immunological response was observed. GAP-43 and N-cadherin immunoreactivities were not expressed by A7 cells, but were seen in the matrix within the area of the graft and in the surrounding brain tissue. This indicates that A7 cells may stimulate expression of GAP-43 and N-cadherin immunoreactivity by host tissue. Expression of Thy 1.1 was not observed within the graft site after 2 weeks of survival, but 6 and 8 weeks after transplantation Thy 1.1 was observed within the graft area, indicating the possible co-existence of grafted cells and host tissue. Although indirect, these observations suggest that the A7 cells induce changes in host brain, including possible growth or regeneration of host tissue into the graft area.
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Affiliation(s)
- M Isono
- Preclinical Neuroscience Section, Neuropsychiatry Branch, NIMH Neuroscience Center at St. Elizabeths, Washington, DC 20032 (USA)
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Takeuchi F, Yamamoto K, Katsuya T, Nabika T, Sugiyama T, Fujioka A, Isono M, Ohnaka K, Fujisawa T, Nakashima E, Ikegami H, Nakamura J, Yamori Y, Yamaguchi S, Kobayashi S, Ogihara T, Takayanagi R, Kato N. Association of genetic variants for susceptibility to obesity with type 2 diabetes in Japanese individuals. Diabetologia 2011; 54:1350-9. [PMID: 21369819 DOI: 10.1007/s00125-011-2086-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2010] [Accepted: 01/25/2011] [Indexed: 12/12/2022]
Abstract
AIMS/HYPOTHESIS In populations of East Asian descent, we performed a replication study of loci previously identified in populations of European descent as being associated with obesity measures such as BMI and type 2 diabetes. METHODS We genotyped 14 single nucleotide polymorphisms (SNPs) from 13 candidate loci that had previously been identified by genome-wide association meta-analyses for obesity measures in Europeans. Genotyping was done in 18,264 participants from two general Japanese populations. For SNPs showing an obesity association in Japanese individuals, we further examined diabetes associations in up to 6,781 cases and 7,307 controls from a subset of the original, as well as from additional populations. RESULTS Significant obesity associations (p < 0.1 two-tailed, concordant direction with previous reports) were replicated for 11 SNPs from the following ten loci in Japanese participants: SEC16B, TMEM18, GNPDA2, BDNF, MTCH2, BCDIN3D-FAIM2, SH2B1-ATP2A1, FTO, MC4R and KCTD15. The strongest effect was observed at TMEM18 rs4854344 (p = 7.1 × 10(-7) for BMI). Among the 11 SNPs showing significant obesity association, six were also associated with diabetes (OR 1.05-1.17; p = 0.04-2.4 × 10(-7)) after adjustment for BMI in the Japanese. When meta-analysed with data from the previous reports, the BMI-adjusted diabetes association was found to be highly significant for the FTO locus in East Asians (OR 1.13; 95% CI 1.09-1.18; p = 7.8 × 10(-10)) with substantial inter-ethnic heterogeneity (p = 0.003). CONCLUSIONS/INTERPRETATION We confirmed that ten candidate loci are associated with obesity measures in the general Japanese populations. Six (of ten) loci exert diabetogenic effects in the Japanese, although relatively modest in size, and independently of increased adiposity.
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Affiliation(s)
- F Takeuchi
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
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Sugimoto T, Yasuda M, Sakaguchi M, Osawa N, Tanaka Y, Uzu T, Kashiwagi A, Araki H, Isono M. Hyponatraemia due to renal proximal tubule dysfunction in a patient with adult-onset Still's disease. QJM 2008; 101:163-4. [PMID: 18184665 DOI: 10.1093/qjmed/hcm141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fujiki M, Kobayashi H, Isono M. High frequency electrical stimulation attenuates progressive necrosis and cavitation following spinal cord injury. Acta Neurochir Suppl 2004; 86:395-7. [PMID: 14753475 DOI: 10.1007/978-3-7091-0651-8_83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
This study evaluates the influence of preconditioning by following electrical stimulation on primary and secondary lesion formation following spinal cord injury in rats. The dorsal surface of the spinal cord was stimulated (500 Hz. 10 pulses/train, inter train interval of 10 sec. for 2 hrs) at the T7 level 24 hrs before a right side hemisection, carried out immediately after injury and maintained every 24 hrs for 7 days. Preconditioning by electrical stimulation of the spinal cord activates reactive astrocytes and significantly attenuates edema and progressive necrosis and cavitation, concerning especially the primary (1, 3 weeks post injury) and secondary (24 hrs, 1, 3 weeks post injury) lesion volume. The results suggest that pre-conditioning by electrical stimulation prevents spinal cord secondary lesion formation after injury, and that the beneficial effect is provided by astroglial cells with regard to their ability to attenuate trauma induced cellular cascades.
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Affiliation(s)
- M Fujiki
- Department of Neurosurgery, Oita Medical University, Oita, Japan.
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Kaga A, Fujiki M, Hori S, Nakano T, Isono M. Motor evoked potentials following transcranial magnetic stimulation after middle cerebral artery and/or basilar artery occlusions in rats. J Clin Neurosci 2003; 10:470-5. [PMID: 12852889 DOI: 10.1016/s0967-5868(03)00082-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 11/23/2022]
Abstract
To clarify the significance of motor evoked potentials following transcranial magnetic stimulation (MMEPs) in acute stage of cerebral ischemia, MMEPs were recorded in rats with the right middle cerebral artery (MCA) and/or the basilar (BA) artery occlusions. MMEPs from bilateral forelimb muscle and regional cerebral blood flow (rCBF) of the pons were recorded simultaneously. After MCA occlusion, the amplitudes of MMEPs from left forelimb were increased up to approximately 184-221% of the pre-ischemic value for 60 min, though the latencies were unchanged. On the other hand, in the rats of BA occlusion and both BA and MCA occlusion groups, MMEPs amplitudes were decreased to 8-25% of the pre-ischemic value for 60 min. Pontine rCBF was decreased to 28-44% in both groups. As a mechanism of the facilitation of MMEPs after MCA occlusion, the affection of the inhibitory mechanism between the cerebral cortex and the generator of MMEPs by MCA occlusion is speculated.
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Affiliation(s)
- A Kaga
- Department of Neurosurgery, Oita Medical University, Idaigaoka, Hasama-machi, Japan.
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Ziyadeh FN, Isono M, Chen S. Involvement of the transforming growth factor-β system in the pathogenesis of diabetic nephropathy. Clin Exp Nephrol 2002; 6:125-9. [DOI: 10.1007/s101570200021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
To investigate the clinical features of Rathke's cleft cysts (RCCs), we retrospectively analyzed 15 cases with histologically confirmed RCCs. All patients underwent formal testing of visual field, endocrinological evaluation and magnetic resonance imagings. As overall presenting symptoms, endocrine disturbance was the most common symptoms, followed by visual disturbance and headache. Among the endocrine disturbances based on adenohypophysial dysfunction, hyperprolactinemia was most common. Considering the size of RCCs, RCCs could induce hyperprolactinemia only when the cysts became large enough to compress the infundibular system. Our series showed relative high incidence of pituitary dwarfism and diabetes insipidus (DI). These facts indicated that RCCs could evoke hyposecretion of growth hormone in young patients and DI in aged patients by direct compression of the pituitary gland in the early stage of progression. All cases who had headache had no other symptoms. We could not prove the evidence that RCCs could induce headaches in these cases. This might be suggested that headache could not be a sole symptom in cases of RCCs.
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Affiliation(s)
- M Isono
- Department of Neurosurgery, Oita Medical University, 1-1, Idaigaoka, Hasama-machi, Oita 879-5593, Japan.
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Ishii K, Isono M, Kasai N, Nakano T, Kubo T, Inoue R, Nomura Y. Midaortic syndrome in childhood associated with a ruptured cerebral aneurysm: a case report. ACTA ACUST UNITED AC 2001; 55:209-12. [PMID: 11358589 DOI: 10.1016/s0090-3019(01)00343-3] [Citation(s) in RCA: 12] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND We present a patient with a midaortic syndrome who presented with subarachnoid hemorrhage caused by rupture of an anterior communicating artery aneurysm. CASE DESCRIPTION A 14-year-old boy with midaortic syndrome was admitted to our hospital because of subarachnoid hemorrhage due to rupture of an anterior communicating artery aneurysm. He also developed acute renal failure due to previously controlled hypotension. After blood dialysis, successful clipping of the aneurysm was performed. The postoperative course was complicated by malignant renovascular hypertension due to midaortic syndrome. Medical treatment failed to control his hypertension; left primary nephrectomy improved his condition. CONCLUSION Although midaortic syndrome is rare, it may be significant as a cause of cerebral hemorrhage in childhood.
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Affiliation(s)
- K Ishii
- Department of Neurosurgery, Oita Medical University, Oita, Japan
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Chen S, Hong SW, Iglesias-de la Cruz MC, Isono M, Casaretto A, Ziyadeh FN. The key role of the transforming growth factor-beta system in the pathogenesis of diabetic nephropathy. Ren Fail 2001; 23:471-81. [PMID: 11499562 DOI: 10.1081/jdi-100104730] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Progressive renal injury in diabetes mellitus leads to major morbidity and mortality. The manifestations of diabetic nephropathy may be a consequence of the actions of certain cytokines and growth factors. Prominent among these is transforming growth factor-beta (TGF-beta) because it promotes renal cell hypertrophy and stimulates extracellular matrix accumulation, the two hallmarks of diabetic renal disease. In cell culture, high ambient glucose increases TGF-beta mRNA and protein in proximal tubular, glomerular epithelial, and mesangial cells. Neutralizing anti-TGF-beta antibodies prevent the hypertrophic and matrix stimulatory effects of high glucose in these cells. In experimental and human diabetes mellitus, several reports describe overexpression of TGF-beta in the glomeruli and tubulointerstitium. We demonstrate that short-term treatment of diabetic mice with neutralizing monoclonal antibodies against TGF-beta significantly reduces kidney weight and glomerular hypertrophy and attenuates the increase in extracellular matrix mRNAs. Long-term treatment of diabetic mice further improves the renal pathology and also ameliorates the functional abnormalities of diabetic nephropathy. Finally, we provide evidence that the renal TGF-beta system is significantly up-regulated in human diabetes. The kidney of a diabetic patient actually elaborates TGF-beta1 protein into the circulation whereas the kidney of a non-diabetic subject extracts TGF-beta1 from the circulation. The data we review here strongly support the hypothesis that elevated production or activity of the TGF-beta system mediates diabetic renal hypertrophy and extracellular matrix expansion.
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Affiliation(s)
- S Chen
- Penn Center for Molecular Studies of Kidney Diseases, Department of Medicine, University of Pennsylvania, Philadelphia 19104-6144, USA
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Hong SW, Isono M, Chen S, Iglesias-De La Cruz MC, Han DC, Ziyadeh FN. Increased glomerular and tubular expression of transforming growth factor-beta1, its type II receptor, and activation of the Smad signaling pathway in the db/db mouse. Am J Pathol 2001; 158:1653-63. [PMID: 11337363 PMCID: PMC1891936 DOI: 10.1016/s0002-9440(10)64121-1] [Citation(s) in RCA: 161] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Activation of the renal transforming growth factor-beta (TGF-beta) system likely mediates the excess production of extracellular matrix in the diabetic kidney. To establish the role of the TGF-beta system in type 2 diabetic nephropathy, we examined the intrarenal localization and expression of the TGF-beta1 isoform, the TGF-beta type II receptor, and the Smad signaling pathway in the 16-week-old db/db mouse, a genetic model of type 2 diabetes that exhibits mesangial matrix expansion, glomerular basement membrane thickening, and renal insufficiency that closely resemble the human disease. Compared with its nondiabetic db/m littermate, the db/db mouse showed significantly increased TGF-beta1 mRNA expression by in situ hybridization in both glomerular and tubular compartments. Likewise, TGF-beta1 protein, by immunohistochemical staining, was increased in both renal compartments, but the fractional expression of TGF-beta1 protein was less than that of the mRNA in the glomerulus. In situ hybridization and immunohistochemical staining for the TGF-beta type II receptor revealed concordant and significant increases of both mRNA and protein in the glomerular and tubular compartments of diabetic animals. Finally, immunohistochemistry showed preferential accumulation of Smad3 in the nuclei of glomerular and tubular cells in diabetes. The complementary technique of Southwestern histochemistry using a labeled Smad-binding element demonstrated increased binding of nuclear proteins to Smad-binding element, indicating active signaling downstream of the TGF-beta stimulus. We therefore propose that the TGF-beta system is up-regulated at the ligand, receptor, and signaling levels throughout the renal cortex in this animal model of type 2 diabetes. Our findings suggest that the profibrotic effects of TGF-beta may underlie the progression to glomerulosclerosis and tubulointerstitial fibrosis that characterize diabetic nephropathy.
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MESH Headings
- Animals
- Binding Sites
- Cell Nucleus/metabolism
- DNA-Binding Proteins/metabolism
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Gene Expression
- Glomerular Mesangium/metabolism
- Glomerular Mesangium/pathology
- Glomerular Mesangium/ultrastructure
- Immunohistochemistry
- In Situ Hybridization
- Kidney Tubules/metabolism
- Kidney Tubules/pathology
- Mice
- Mice, Inbred C57BL
- Microscopy, Electron
- Nuclear Proteins/metabolism
- Protein Binding
- Protein Serine-Threonine Kinases
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, Transforming Growth Factor-beta Type II
- Receptors, Transforming Growth Factor beta/genetics
- Receptors, Transforming Growth Factor beta/metabolism
- Signal Transduction
- Smad3 Protein
- Trans-Activators/metabolism
- Transforming Growth Factor beta/genetics
- Transforming Growth Factor beta/metabolism
- Transforming Growth Factor beta1
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Affiliation(s)
- S W Hong
- Renal-Electrolyte and Hypertension Division of the Department of Medicine and the Penn Center for the Molecular Studies of Kidney Diseases, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Han DC, Isono M, Chen S, Casaretto A, Hong SW, Wolf G, Ziyadeh FN. Leptin stimulates type I collagen production in db/db mesangial cells: glucose uptake and TGF-beta type II receptor expression. Kidney Int 2001; 59:1315-23. [PMID: 11260392 DOI: 10.1046/j.1523-1755.2001.0590041315.x] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Serum leptin levels correlate with fat cell mass and are elevated in patients with massive obesity and type 2 diabetes mellitus, which are strong risk factors for the development of glomerulosclerosis. We have previously shown in cultured glomerular endothelial cells that leptin stimulates cellular proliferation and expression of the prosclerotic cytokine transforming growth factor-beta1 (TGF-beta1). Although the effect of leptin on the hypothalamus to regulate energy homeostasis is well known, the effect of leptin on the kidney, and specifically on the glomerular mesangial cell, is unclear. METHODS The obese, diabetic db/db mouse, which lacks the functional full-length Ob-Rb leptin receptor, is a suitable model to assess the effects of hyperleptinemia on peripheral tissues that express other receptor isoforms. The effects of leptin on glucose uptake, the TGF-beta system, and type I collagen production were evaluated in db/db mouse mesangial cells in culture. A phosphatidylinositol-3 kinase (PI-3K) inhibitor was used to assess the role of PI-3K in mediating the effects of leptin. RESULTS A short form of the leptin receptor (Ob-Ra), but not Ob-Rb, was present by reverse transcription-polymerase chain reaction in the kidney and mesangial cells of both nondiabetic db/m and diabetic db/db mice. In db/db mesangial cells, leptin increased 2-deoxy-D-glucose (2DOG) uptake dose dependently and stimulated gene expression of TGF-beta type II receptor (TbetaRII) and alpha1(I) collagen, but not TGF-beta1. Protein production of type I collagen (enzyme-linked immunosorbent assay) was also increased by leptin. Both leptin-stimulated 2DOG uptake and type I collagen production were suppressed by a PI-3K inhibitor, LY294002. Mesangial cells pretreated with leptin exhibited increased responsiveness to exogenous TGF-beta1, as evidenced by a greater production of type I collagen protein in leptin-pretreated cells exposed to low-dose TGF-beta1 (0.5 ng/mL). The addition of both TGF-beta1 (2 ng/mL) and leptin (100 ng/mL) increased type I collagen production more than addition of either TGF-beta1 or leptin alone. CONCLUSIONS Leptin increases glucose uptake and type I collagen in db/db mesangial cells through a PI-3K-dependent pathway. We postulate that increased leptin levels may transmit a signal through the short-form leptin receptor to up-regulate TbetaRII and activate the intraglomerular TGF-beta system, which may contribute to the glomerulosclerosis of obesity or type 2 diabetes.
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Affiliation(s)
- D C Han
- Renal-Electrolyte and Hypertension Division and Penn Center for Molecular Studies of Kidney Diseases, Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6144, USA
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Isono M, Ishii K, Kamida T, Fujiki M, Goda M, Kobayashi H. Retro-odontoid soft tissue mass associated with atlantoaxial subluxation in an elderly patient: a case report. ACTA ACUST UNITED AC 2001; 55:223-7. [PMID: 11358595 DOI: 10.1016/s0090-3019(01)00345-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [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: 11/16/2022]
Abstract
BACKGROUND We present the case of an elderly patient with a retro-odontoid soft tissue mass associated with atlanto-axial subluxation. CASE DESCRIPTION A 74-year-old man was admitted to our hospital with progressive motor weakness in his right arm and neck pain. Radiological examinations revealed atlantoaxial subluxation and diffuse degenerative changes. Cervical MRI revealed a syrinx at the C1 level and a retro-odontoid soft tissue mass that severely compressed the spinal cord. The mass was of low signal intensity on both T1- and T2-weighted images. Conservative therapy could not stop the progression of his symptoms, so posterior decompression via a laminectomy of C1 and occipitocervical fixation was performed. These procedures resulted in an improvement of his neurological condition and in reduction of the mass and the compression of the spinal cord. CONCLUSION The patient lacked any specific conditions that might have caused chronic atlantoaxial subluxation. The degenerative changes alone might have provoked chronic atlantoaxial subluxation and a subsequent retro-odontoid soft tissue mass. In patients with this condition, posterior fixation without direct removal of the mass should be the first choice for surgical intervention.
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Affiliation(s)
- M Isono
- Department of Neurosurgery, Oita Medical University, Oita, Japan
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Isono M, Murata K, Nakayama K, Miyashita H, Tanaka H, Ishikawa M. Inner ear anomaly of three-dimensional computed tomography: computed tomographic attenuation and image changes. Acta Otolaryngol Suppl 2001; 542:62-6. [PMID: 10897403 DOI: 10.1080/000164800454693] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
With regard to image diagnosis of inner ear anomalies, three-dimensional computed tomography (3D-CT) is useful in obtaining very realistic images that are unmatched by 2D-CT. Unlike the step scanning in the existing 2D-CT, in helical 3D-CT, scanning is performed in a spiral motion by continuously rotating the scanner and moving the table along the body axis at a constant speed. As a result, data obtained by this CT are continuous and very smooth curves can be obtained. Among the data, the CT attenuation determines the quality of the final 3D images. In the present paper, the usefulness of 3D-CT was investigated in a case with Mondini-type inner ear malformation.
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Affiliation(s)
- M Isono
- Department of Otolaryngology, Kinki University School of Medicine, Osaka, Japan
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Miyashita H, Isono M, Murata K, Nakayama K, Tanaka H, Ishikawa M. Three-dimensional magnetic resonance imaging findings of inner ear anomaly. Acta Otolaryngol Suppl 2001; 542:67-70. [PMID: 10897404 DOI: 10.1080/000164800454701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Using three-dimensional magnetic resonance imaging (3D-MRI), the membranous labyrinth was examined in normal cases and in a case with bilateral Mondini-type inner ear malformations. Both ears were also examined by high-resolution computed tomography (CT) of the temporal bone. 3D-MRI provided more detail than findings obtained by conventional high-resolution CT and it enabled 3D observations to be made. Detailed examination of maximum intensity projection images along the cochlea axis revealed the cochlear turns in three dimensions.
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Affiliation(s)
- H Miyashita
- Department of Otolaryngology, Kinki University School of Medicine, Osaka, Japan
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Wakabayashi Y, Nakano T, Isono M, Shimomura T, Hori S. Dissecting aneurysm of the anterior cerebral artery requiring surgical treatment--case report. Neurol Med Chir (Tokyo) 2000; 40:624-7. [PMID: 11153192 DOI: 10.2176/nmc.40.624] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A 45-year-old male presented with spontaneous dissecting aneurysm in the anterior cerebral artery manifesting as headache persisting for several days and speech disturbance. Neurological and laboratory examinations showed no abnormalities. Magnetic resonance imaging revealed infarction in the right cingulate gyrus. Angiography revealed occlusion of the right A2. Repeat angiography 8 months later showed a saccular aneurysm had developed. The interhemispheric approach exposed the aneurysm at the junction between the right frontopolar artery and the pericallosal artery. The aneurysm was fusiform due to the right A2 dissection. The aneurysm was trapped and resected. One month after the operation, the patient was discharged without neurological deficits. Cases of dissecting aneurysms in the anterior cerebral artery with ischemic onset are usually treated conservatively. Cases requiring surgery include those due to trauma, growing aneurysms, giant aneurysms, and uncontrolled hypertension. Some dissecting aneurysms of the distal anterior cerebral artery require only resection without bypass surgery.
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Affiliation(s)
- Y Wakabayashi
- Department of Neurosurgery, Oita Medical University, Oita
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Nomi T, Shiota G, Isono M, Sato K, Kawasaki H. Adenovirus-mediated hepatocyte growth factor gene transfer prevents lethal liver failure in rats. Biochem Biophys Res Commun 2000; 278:338-43. [PMID: 11097840 DOI: 10.1006/bbrc.2000.3793] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 12/22/2022]
Abstract
Hepatocyte growth factor (HGF) has a potent antiapoptotic effect on hepatocytes in D-galactosamine (D-GalN)/lipopolysaccharide (LPS)-treated rats. Here, we report that adenovirus mediated HGF gene transfer into liver prevents liver failure and reduces mortality of rats treated with d-GalN/LPS. Fisher 344 rats, which were given intraperitoneal injections of pAxCAHGF 48 h before, were treated with D-GalN/LPS. Serum ALT in the HGF group at 6 and 12 h after D-GalN/LPS was decreased to 1/6 and 1/12 of the control group (P < 0.01, each). Concomitant reduction of apoptotic cells were also observed. The Kaplan-Meier analysis showed that a survival rate in the HGF group was improved, compared to that in the control group (P < 0.05). Caspase-3 activity in the HGF group decreased, compared to that in the control group, especially at 12 h (P < 0.05), although it maintained a high level in the control group. Expression of Bcl-xL and cyclooxygenase-2 (Cox-2) was induced in liver by HGF gene transfer. These data suggest that HGF exerts an antiapoptotic effect through dual induction of Bcl-xL and Cox-2, which suppresses caspase-3 activity.
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Affiliation(s)
- T Nomi
- Second Department of Internal Medicine, Tottori University, Yonago, 683-8504, Japan
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Ishii K, Isono M, Inoue R, Hori S. Attempted gene therapy for intractable pain: dexamethasone-mediated exogenous control of beta-endorphin secretion in genetically modified cells and intrathecal transplantation. Exp Neurol 2000; 166:90-8. [PMID: 11031086 DOI: 10.1006/exnr.2000.7491] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
For optimal neural transplantation using gene engineering, it might be important to control the expression of the transfected gene extrinsically as required. This strategy could be very useful for the treatment of intractable pain that responds to opioids. For this purpose, we established a genetically modified embryonal carcinoma cell line (P19) in which the expression of beta-endorphin (beta-EP) could be controlled by the addition of dexamethasone. To obtain extrinsic control, we transfected the cells with pMAMneo containing mouse MMTV-LTR as a promoter and cDNA of the artificial beta-EP. The upregulation of beta-EP, through the activation of MMTV by the administration of dexamethasone, was confirmed in vitro. Then we transplanted these cells into the subarachonoid space in rats and evaluated the analgesic potential of these cells in vivo by hot plate test and formalin test. In the rats that received beta-EP-producing cells, we observed prominent analgesic effects after the transplantation for a month. The administration of naloxone blocked these effects. Intraperitoneal injection of 100 mg/kg dexamethasone further enhanced these effects by up to two times. These data indicate obvious analgesic effects of the cells after the transplantation and the possible exogenous upregulation of transfected beta-EP gene expression in vivo. The application of this technique might provide a new therapeutic approach to various neurological diseases.
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Affiliation(s)
- K Ishii
- Department of Neurosurgery, Oita Medical University, 1-1 Idaigaoka, Hasama-machi, Oita, 879-5593, Japan
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