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Narita M, Monma N, Chiba K, Suzuki R, Fujita S, Hoshino C, Nakamura K, Sekikawa Y, Ikeda H, Inoue M, Shimbo T, Yamamoto S, Ando S, Takada N, Fujita H. Masqueraders Around Disaster: Clinical Features of Scrub Typhus in Fukushima, Japan. Open Forum Infect Dis 2024; 11:ofae215. [PMID: 38756759 PMCID: PMC11096087 DOI: 10.1093/ofid/ofae215] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/16/2024] [Indexed: 05/18/2024] Open
Abstract
Background Scrub typhus (ST) is endemic in Fukushima, with the largest number of cases reported in Japan from 2009 to 2010. Although ST is highly treatable, its atypical clinical presentation impedes diagnosis, causing delays in treatment. Methods We review the clinical features of ST in adults from 2008 to 2017 at Ohta Nishinouchi General Hospital in Fukushima, Japan. Results Fifty-five cases (serotype Karp 24, Irie/Kawasaki 21, Hirano/Kuroki 10) of ST were confirmed via serology based on elevated immunoglobulin (Ig)M and IgG and polymerase chain reaction positivity of eschar samples. The mean age was 69 years, and 64% were female. The case fatality rate was 1.8% (1/55). Approximately 70% of cases (38/55) were not diagnosed as ST upon the initial clinic visit. Inappropriate use of antibiotics was identified in 22% of cases (12/55). In terms of atypical clinical features, 1 or more of the manifestations, fever, rash, and eschar, was absent in 31% of cases (17/55). Approximately 11% of cases presented without eschar (6/55; Karp 1, Irie/Kawasaki 1, Hirano/Kuroki 4). Moreover, severe complications were observed with shock and disseminated intravascular coagulation in 7% of cases (4/55), Thus, while 53% of cases presented with the typical triad (29/55), unusual complications and atypical features occurred in 40% (22/55). Conclusions Diagnosis of ST becomes clinically challenging in the absence of typical features. In Fukushima, an endemic area of ST, an atypical presentation involving multisystem disease is common.
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Affiliation(s)
- Masashi Narita
- Division of Infectious Diseases, Department of Internal Medicine, Okinawa Prefectural Nambu Medical Center & Children's Medical Center, Haebaru, Japan
- Division of Infectious Diseases, Department of Internal Medicine, Okinawa Prefectural Chubu Hospital, Uruma, Japan
- Department of Medicine, Ohta Nishinouch General Hospital, Koriyama, Japan
| | - Naota Monma
- Department of Infection Control, Fukushima Medical University, Fukushima, Japan
| | - Kazuki Chiba
- Fukushima Prefectural Institute of Public Health, Fukushima, Japan
| | - Rie Suzuki
- Fukushima Prefectural Institute of Public Health, Fukushima, Japan
| | - Shohei Fujita
- Fukushima Prefectural Institute of Public Health, Fukushima, Japan
| | | | - Kiwamu Nakamura
- Department of Infection Control, Fukushima Medical University, Fukushima, Japan
| | - Yoshiyuki Sekikawa
- Division of Infectious Diseases, Department of Internal Medicine, Japanese Red Cross Musashino Hospital, Musashino, Japan
| | | | - Minoru Inoue
- Department of Medicine, Ohta Nishinouch General Hospital, Koriyama, Japan
| | - Takuro Shimbo
- Department of Medicine, Ohta Nishinouch General Hospital, Koriyama, Japan
| | - Seigo Yamamoto
- Miyazaki Prefectural Institute for Public Health and Environment, Miyazaki, Japan (former affiliation)
| | - Shuji Ando
- National Institute of Infectious Diseases, Tokyo, Japan
| | - Nobuhiro Takada
- Department of Pathological Sciences, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Hiromi Fujita
- Institute of Rickettsioses, Kita-Fukushima Medical Center, Fukushima, Japan
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Ogawa M, Takada N, Noda S, Takahashi M, Matsutani M, Kageyama D, Ebihara H. GENETIC VARIATION OF LEPTOTROMBIDIUM (ACARI: TROMBICULIDAE) MITES CARRYING ORIENTIA TSUTSUGAMUSHI, THE BACTERIAL PATHOGEN CAUSING SCRUB TYPHUS. J Parasitol 2023; 109:340-348. [PMID: 37498779 PMCID: PMC10658875 DOI: 10.1645/22-97] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023] Open
Abstract
Leptotrombidium (Acari: Trombiculidae) mites are carriers of Orientia tsutsugamushi, the bacterial pathogen causing scrub typhus in humans. Classification of Leptotrombidium is vital because limited mite species carry O. tsutsugamushi. Generally, Leptotrombidium at the larval stage (approximately 0.2 mm in size) are used for morphological identification. However, morphological identification is often challenging because it requires considerable skills and taxonomic expertise. In this study, we found that the full-length sequences of the mitochondrial cytochrome c oxidase subunit 1 gene varied among the significant Leptotrombidium. On the basis of these, we modified the canonical deoxyribonucleic acid (DNA) barcoding method for animals by redesigning the primer set to be suitable for Leptotrombidium. Polymerase chain reaction with the redesigned primer set drastically increased the detection sensitivity, especially against Leptotrombidium scutellare (approximately 17% increase), one of the significant mites carrying O. tsutsugamushi. Phylogenetic analysis showed that the samples morphologically classified as L. scutellare and Leptotrombidium pallidum were further split into 3 and 2 distinct subclusters respectively. The mean genetic distance (p-distance) between L. scutellare and L. pallidum was 0.2147, whereas the mean distances within each species were 0.052 and 0.044, respectively. Within L. scutellare, the mean genetic distances between the 3 subclusters were 0.1626-0.1732, whereas the distances within each subcluster were 0.003-0.017. Within L. pallidum, the mean genetic distance between the 2 subclusters was 0.1029, whereas the distances within each subcluster were 0.010-0.013. The DNA barcoding uncovered a broad genetic diversity of Leptotrombidium, especially of L. scutellare and L. pallidum, the notable species carrying O. tsutsugamushi. We conclude that the DNA barcoding using our primers enables precise and detailed classification of Leptotrombidium and implies the existence of a subgenotype in Leptotrombidium that had not been found by morphological identification.
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Affiliation(s)
- Motohiko Ogawa
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1, Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Nobuhiro Takada
- Faculty of Medical Sciences, University of Fukui, 23-3 Matsuoka, Eiheiji, Fukui 910-1193, Japan
| | - Shinichi Noda
- Research Center for the Pacific Islands, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Japan
| | - Mamoru Takahashi
- Department of Anesthesiology, Saitama Medical University, 38 Moroyama-Machi, Iruma-Gun, Saitama, 350-0495, Japan
| | - Minenosuke Matsutani
- NODAI Genome Research Center, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo 156-8502, Japan
| | - Daisuke Kageyama
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, 1-2, Owashi, Tsukuba, Ibaraki 305-0851, Japan
| | - Hideki Ebihara
- Department of Virology I, National Institute of Infectious Diseases, 1-23-1, Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
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Matsubara Y, Inamura N, Takada N, Fujita T. Prenatal diagnosis of cor triatriatum sinister. Ultrasound Obstet Gynecol 2023; 61:124-126. [PMID: 36273403 DOI: 10.1002/uog.26099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 10/10/2022] [Accepted: 10/14/2022] [Indexed: 05/27/2023]
Affiliation(s)
| | - N Inamura
- Department of Pediatrics, Faculty of Medicine, Kindai University, Osaka, Japan
| | - N Takada
- Department of Pediatrics, Faculty of Medicine, Kindai University, Osaka, Japan
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Shima K, Inoue T, Uehara Y, Iwamura M, Fukagawa S, Kuwano T, Tanida K, Takada N, Saito‐Abe M, Yamamoto‐Hanada K, Ohya Y, Murase T. Non‐invasive transcriptomic analysis using
mRNAs
in skin surface lipids obtained from children with mild‐to‐moderate atopic dermatitis. J Eur Acad Dermatol Venereol 2022; 36:1477-1485. [PMID: 35462437 PMCID: PMC9545805 DOI: 10.1111/jdv.18173] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 12/08/2021] [Accepted: 03/23/2022] [Indexed: 11/29/2022]
Abstract
Background Specimens for analysing the molecular pathology of skin disease are generally obtained through invasive methods, such as biopsy. However, less burdensome methods are desirable for paediatric patients. We recently established a method that comprehensively analyses RNA present in sebum (skin surface lipid–RNAs: SSL‐RNAs) using a next‐generation sequencer. Using this method, biological information can be obtained from the skin in a completely non‐invasive manner. Objectives To verify the applicability of the SSL‐RNA method for analysis of paediatric skin and analyse the molecular pathology of mild‐to‐moderate atopic dermatitis (AD) in children. Methods We collected sebum specimens from the whole faces of 23 healthy children and 16 children with mild‐to‐moderate AD (eczema area and severity index (EASI) score: 5.9 ± 2.6) ranging in age from 6 months to 5 years, using an oil‐blotting film. We then extracted SSL‐RNAs from the samples and performed an AmpliSeq transcriptomic analysis. Results The expressions of genes related to keratinization (LCE, PSORS1C2, IVL and KRT17), triglyceride synthesis and storage (PLIN2, DGAT2 and CIDEA), wax synthesis (FAR2), ceramide synthesis (GBA2, SMPD3 and SPTLC3), antimicrobial peptides (DEFB1) and intercellular adhesion (CDSN), all of which are related to the skin barrier, are lower in children with AD than in healthy children. The children with AD also have higher expression of CCL17, a Th2‐cytokine and an increased Th2‐immune response as demonstrated by a gene set variation analysis. Moreover, KRT17 and CCL17 expression levels are significantly correlated with the EASI score. Conclusions Molecular changes associated with abnormal immune responses and the epidermal barrier in children with mild‐to‐moderate AD can be determined using the SSL‐RNA method. This non‐invasive method could therefore be a useful means for understanding the molecular pathology of paediatric AD.
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Affiliation(s)
- K. Shima
- Biological Science Research, Kao Corporation Tochigi Japan
| | - T. Inoue
- Biological Science Research, Kao Corporation Tochigi Japan
| | - Y. Uehara
- Biological Science Research, Kao Corporation Tochigi Japan
| | - M. Iwamura
- Biological Science Research, Kao Corporation Tochigi Japan
| | - S. Fukagawa
- Biological Science Research, Kao Corporation Tochigi Japan
| | - T. Kuwano
- Biological Science Research, Kao Corporation Tochigi Japan
| | - K. Tanida
- Biological Science Research, Kao Corporation Tochigi Japan
| | - N. Takada
- Biological Science Research, Kao Corporation Tochigi Japan
| | - M. Saito‐Abe
- Allergy Center, National Center for Child Health and Development Tokyo Japan
| | - K. Yamamoto‐Hanada
- Allergy Center, National Center for Child Health and Development Tokyo Japan
| | - Y. Ohya
- Allergy Center, National Center for Child Health and Development Tokyo Japan
| | - T. Murase
- Biological Science Research, Kao Corporation Tochigi Japan
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Takahashi M, Kunita S, Kawakami M, Kadosaka T, Fujita H, Takada N, Miyake M, Kobayashi T, Ohnishi H, Nagashima S, Murata K, Okamoto H. First Detection and Characterization of Rat Hepatitis E Virus (HEV-C1) in Japan. Virus Res 2022; 314:198766. [DOI: 10.1016/j.virusres.2022.198766] [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] [Received: 02/24/2022] [Revised: 03/27/2022] [Accepted: 03/28/2022] [Indexed: 10/18/2022]
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Takada N, Asakura K, Sugiyama S. Developing and validating the Japanese version of professional attitude scale for nurses. Int Nurs Rev 2020; 68:24-33. [PMID: 33047308 PMCID: PMC8247416 DOI: 10.1111/inr.12627] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 08/20/2020] [Accepted: 08/23/2020] [Indexed: 11/28/2022]
Abstract
Aim We developed and psychometrically tested the Japanese version of the Professional Attitude Scale for Nurses (PASN‐J). Background Nurses must recognize the importance of their professionalism; therefore, it is critical to quantitatively measure nurses’ professional attitudes. Introduction This instrument validation study was designed to generate an itemized scale and examine its content validity/psychometric testing using a sample of Japanese nurses. Methods Based on a trait approach focusing on the characteristic traits of the nursing profession, a 59‐item draft scale was generated. During November 2017, 2657 nurses from 29 facilities in Japan were surveyed. The questionnaire included demographics, the 59‐item draft scale, and a self‐report scale of nurses’ professional behaviour and nursing practice ability. Using exploratory and confirmatory factor analyses, we evaluated the construct, criterion‐related, concurrent, and known‐groups validity, and reliability of the PASN‐J. Results Data from 1716 participants were analysed. The analyses yielded a 38‐item, 3‐factor scale that adequately fit the data. PASN‐J scores were positively correlated with nurses’ professional behaviour and nursing practice ability. Conclusion The 38‐item PASN‐J has good reliability and validity, making it useful for measuring the current condition of nursing professionalism and evaluating nursing education. Implications for Nursing and Health Policy: This scale can evaluate nursing education and promote nurses’ professionalism. The PASN‐J will help identifying the elements of undergraduate nursing education that require further emphasis. Additionally, the PASN‐J could facilitate the development of nursing policies to promote professional development in nurses. Ultimately, evaluating nursing education with the PASN‐J enhances nurses’ professional attitudes and subsequently improves their quality of nursing, nursing efficiency and patient outcomes.
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Affiliation(s)
- N Takada
- Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - K Asakura
- Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - S Sugiyama
- Graduate School of Medicine, Tohoku University, Sendai, Japan
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Ogawa M, Takahashi M, Matsutani M, Takada N, Noda S, Saijo M. Obligate intracellular bacteria diversity in unfed Leptotrombidium scutellare larvae highlights novel bacterial endosymbionts of mites. Microbiol Immunol 2019; 64:1-9. [PMID: 31549736 DOI: 10.1111/1348-0421.12745] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 06/11/2019] [Revised: 08/27/2019] [Accepted: 09/17/2019] [Indexed: 11/30/2022]
Abstract
It is well known that the mite Leptotrombidium scutellare carries the pathogen of scrub typhus, Orientia tsutsugamushi. However, our understanding of other bacterial endosymbionts of mites is limited. This study investigated the diversity of the obligate intracellular bacteria carried by L. scutellare using 16S rRNA gene amplicon analysis with next-generation sequencing. The results showed that the detected bacteria were classified into the genera Rickettsia, Wolbachia, and Rickettsiella and an unknown genus of the order Rickettsiales. For further classification of the detected bacteria, a representative read that was most closely related to the assigned taxonomic classification was subjected to homology search and phylogenic analysis. The results showed that some bacteria of the genus Rickettsia were identical or very close to the human pathogens Rickettsia akari, Rickettsia aeschlimannii, Rickettsia felis, and Rickettsia australis. The genetic distance between the genus Wolbachia bacteria in the present study and in previous reports is highly indicative that the bacteria in the present study can be classified as a new taxon of Wolbachia. This study detected obligate intracellular bacteria from unfed mites; thus, the mites did not acquire bacteria from infected animals or any other infectious sources. Finally, the present study demonstrated that various and novel bacterial endosymbionts of mites, in addition to O. tsutsugamushi, might uniquely evolve with the host mites throughout overlapping generations of the mite life cycle. The roles of the bacteria in mites and their pathogenicity should be further examined in studies based on bacterial isolation.
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Affiliation(s)
- Motohiko Ogawa
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Mamoru Takahashi
- Department of Anesthesiology, Saitama Medical University, Saitama, Japan
| | - Minenosuke Matsutani
- NODAI Genome Research Center, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | - Nobuhiro Takada
- Faculty of Medical Sciences, University of Fukui, Eiheiji, Fukui, Japan
| | - Shinichi Noda
- Research Center for the Pacific Islands, Kagoshima University, Kagoshima, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
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8
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Mafie E, Saito-Ito A, Kasai M, Hatta M, Rivera PT, Ma XH, Chen ER, Sato H, Takada N. Integrative taxonomic approach of trypanosomes in the blood of rodents and soricids in Asian countries, with the description of three new species. Parasitol Res 2018; 118:97-109. [PMID: 30353232 DOI: 10.1007/s00436-018-6120-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/15/2018] [Indexed: 11/26/2022]
Abstract
Trypanosoma lewisi (Kinetoplastea: Trypanosomatida: Trypanosomatidae) with a cosmopolitan distribution is the type species of the subgenus Herpetosoma, which includes ca. 50 nominal species isolated mainly from rodents. Since members of Herpetosoma in different host species have an almost identical morphology of bloodstream forms, these trypanosomes are referred to as 'T. lewisi-like', and the molecular genetic characterization of each species is necessary to verify their taxonomy. In the present study, we collected blood samples from 89 murid rodents of 15 species and 11 soricids of four species in Indonesia, Philippines, Vietnam, Taiwan, and mainland China for the detection of hemoprotozoan infection. T. lewisi and T. lewisi-like trypanosomes were found in the blood smears of 10 murid animals, which included Bandicota indica (two rats), Rattus argentiventer (one rat), and Rattus tiomanicus (two rats) in Indonesia; Rattus rattus (one rat) in the Philippines; and Niviventer confucianus (four rats) in mainland China. Furthermore, large- or medium-sized non-T. lewisi-like trypanosomes were detected in two soricids, Crocidura dracula in Vietnam and Anourosorex yamashinai in Taiwan, respectively. Molecular genetic characterization of the small subunit (SSU) ribosomal RNA gene (rDNA) and glycosomal glyceraldehyde-3-phosphate dehydrogenase (gGAPDH) gene indicated that the trypanosomes from all the murid hosts had identical SSU rDNA or gGAPDH gene nucleotide sequences except for those in N. confucianus in mainland China. These N. confucianus-infecting trypanosomes also showed several unique morphological features such as smaller bodies, anteriorly positioned nuclei, and larger rod-shaped kinetoplasts when compared with T. lewisi trypomastigotes. Trypanosoma (Herpetosoma) niviventerae n. sp. is erected for this new species. Similarly, based on morphological and molecular genetic characterization, Trypanosoma sapaensis n. sp. and Trypanosoma anourosoricis n. sp. are proposed for the trypanosomes in C. dracula in Vietnam and A. yamashinai in Taiwan, respectively. More effort directed toward the morphological and molecular genetic characterization of the trypanosomes of rodents and soricids is required to fully understand the real biodiversity of their hemoflagellates.
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Affiliation(s)
- Eliakunda Mafie
- Laboratory of Parasitology, United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan
| | - Atsuko Saito-Ito
- Section of Parasitology, Division of Microbiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, 650-0017, Japan
- Section of Microbiology, School of Pharmacy, Hyogo University of Health Sciences, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo, 650-8530, Japan
| | - Masatoshi Kasai
- Section of Parasitology, Division of Microbiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, 650-0017, Japan
| | - Mochammad Hatta
- Department of Medical Microbiology, Molecular Biology and Immunology Laboratory, Faculty of Medicine, Hasanuddin University, Makassar, South Sulawesi, Indonesia
| | - Pilarita T Rivera
- Department of Parasitology, College of Public Health, University of the Philippines Manila, 625 Pedro Gil Street, 1000, Manila, Philippines
| | - Xiao-Hang Ma
- College of Life Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Eng-Rin Chen
- Department of Parasitology, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Road, Kaohsiung, Taiwan
| | - Hiroshi Sato
- Laboratory of Parasitology, United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan.
- Faculty of Veterinary Medicine, Airlangga University, Campus C, Mulyorejo, Surabaya, 60115, Indonesia.
| | - Nobuhiro Takada
- Faculty of Medical Sciences, University of Fukui, Fukui, 910-1193, Japan
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Tsuruoka S, Kataoka M, Makita K, Ishikawa H, Takada N, Nagasaki K, Hamamoto Y, Mochizuki T. EP-1435: The role of elective nodal irradiation in radiotherapy for stage I esophageal cancer. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31744-4] [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: 10/14/2022]
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Kanzaki A, Natsuaki M, Matsutani S, Mase K, Nakajima E, Kataoka S, Konya H, Takeda A, Nishiura T, Takada N. Two cases of Japanese spotted fever infected in Rokko mountain near urban area of southern Hyogo Prefecture. J Dermatol 2018; 45:e146-e147. [PMID: 29315729 DOI: 10.1111/1346-8138.14208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akinori Kanzaki
- Department of Internal Medicine, Ashiya Municipal Hospital, Ashiya, Japan.,Division of Endocrinology and Metabolism, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Masaru Natsuaki
- Department of Dermatology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Satoshi Matsutani
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Koushi Mase
- Department of Internal Medicine, Ashiya Municipal Hospital, Ashiya, Japan
| | - Emi Nakajima
- Department of Nursing, Ashiya Municipal Hospital, Ashiya, Japan
| | - Seiko Kataoka
- Department of Internal Medicine, Ashiya Municipal Hospital, Ashiya, Japan
| | - Hiroyuki Konya
- Department of Internal Medicine, Ashiya Municipal Hospital, Ashiya, Japan
| | - Akira Takeda
- Department of Internal Medicine, Ashiya Municipal Hospital, Ashiya, Japan
| | - Tetsuo Nishiura
- Department of Internal Medicine, Ashiya Municipal Hospital, Ashiya, Japan
| | - Nobuhiro Takada
- Faculty of Medical Sciences, University of Fukui, Yoshida-gun, Japan
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Iwabu-Itoh Y, Bazartseren B, Naranbaatar O, Yondonjamts E, Furuno K, Lee K, Sato K, Kawabata H, Takada N, Andoh M, Kajita H, Oikawa Y, Nakao M, Ohnishi M, Watarai M, Shimoda H, Maeda K, Takano A. Tick surveillance for Borrelia miyamotoi and phylogenetic analysis of isolates in Mongolia and Japan. Ticks Tick Borne Dis 2017; 8:850-857. [PMID: 28768603 DOI: 10.1016/j.ttbdis.2017.06.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 01/10/2017] [Revised: 06/27/2017] [Accepted: 06/27/2017] [Indexed: 01/19/2023]
Abstract
Borrelia miyamotoi, recently recognized as a human pathogenic spirochete, was isolated from Ixodes persulcatus and I. ovatus in northern Mongolia and Honshu Island, a major island in Japan. Although no human B. miyamotoi infections have been reported in Mongolia, the prevalence of B. miyamotoi in ticks from Mongolia is higher than that in ticks from Hokkaido, Japan, where human cases have been reported. Moreover, the multi-locus sequence analysis of cultured isolates revealed that B. miyamotoi isolates in Mongolia belong to the Siberian type, a sequence type that was originally reported from isolates from I. persulcatus in Hokkaido. Thus, there is a possibility of unrecognized human B. miyamotoi infections in Mongolia. Moreover our data support the hypothesis of clonal expansion of the Siberian type B. miyamotoi. In contrast, although the isolates were found to belong to the Siberian type B. miyamotoi, two isolates from I. persulcatus in Honshu Island were identified to be of a different sequence type. Furthermore, B. miyamotoi isolates from I. ovatus were distinguishable from those from I. ricinus complex ticks, according to genetic analysis. In this study, we show that there may be some genetic diversity among B. miyamotoi in ticks from Honshu Island.
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Affiliation(s)
- Yukie Iwabu-Itoh
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Boldbaatar Bazartseren
- Laboratory of Virology, Institute of Veterinary Medicine, Mongolian University of Life Sciences, Zaisan, Ulaanbaatar 17024, Mongolia
| | - Oyunnomin Naranbaatar
- Laboratory of Virology, Institute of Veterinary Medicine, Mongolian University of Life Sciences, Zaisan, Ulaanbaatar 17024, Mongolia
| | - Enkhmandakh Yondonjamts
- Laboratory of Virology, Institute of Veterinary Medicine, Mongolian University of Life Sciences, Zaisan, Ulaanbaatar 17024, Mongolia
| | - Kiwa Furuno
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kyunglee Lee
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Kozue Sato
- Department of Bacteriology-I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Hiroki Kawabata
- Department of Bacteriology-I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan; United Graduate School of Veterinary Science, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Nobuhiro Takada
- Faculty of Medical Sciences, University of Fukui, 23-3 Matsuoka, Eiheiji, Fukui 910-1193, Japan
| | - Masako Andoh
- Laboratory of Veterinary Public Health, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
| | - Hiroko Kajita
- Iwate Prefecture Research Institute for Environmental Sciences and Public Health, 1-11-16 Kitaiioka, Morioka, Iwate 020-0857, Japan
| | - Yosaburo Oikawa
- Department of Medical Zoology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan
| | - Minoru Nakao
- Asahikawa Medical University, 1-1-1 Higashi 2, Midorigaoka, Asahikawa, Hokkaido 078-8510, Japan
| | - Makoto Ohnishi
- Department of Bacteriology-I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Masahisa Watarai
- The United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan
| | - Hiroshi Shimoda
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Ken Maeda
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
| | - Ai Takano
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan; The United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8515, Japan.
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12
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Higuchi M, Hirokawa M, Suzuki A, Takada N, Yamao N, Kuma S, Miyauchi A. Cytological features of solid variants of papillary thyroid carcinoma: a fine needle aspiration cytology study of 18 cases. Cytopathology 2016; 28:268-272. [PMID: 27862483 DOI: 10.1111/cyt.12399] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Solid variants of papillary thyroid carcinoma (SV-PTC) are rare, and there have been few reports describing the cytological findings of such variants. METHODS The cytological features of cellular specimens aspirated from 18 histologically confirmed SV-PTC cases were evaluated, retrospectively. RESULTS Solid and small papillary clusters were observed in 14 (77.8%) and 13 (72.2%) cases, respectively. The incidences of large papillary clusters (11.1%) and sheet-like arrangements (11.1%) were low. Nuclear features were consistent with conventional PTC. The background was clean, and there were no colloid materials, foamy histiocytes, multinucleated giant cells, psammoma bodies, or necrotic materials. CONCLUSIONS Solid clusters and small papillary clusters in conjunction with a clean background are diagnostic clues that indicate SV-PTC cytologically. It is thought that small papillary clusters reflect the micropapillary growth pattern seen within the lumen of middle-sized follicular structures. The presence of nuclear findings typical of conventional PTC and the absence of mitotic figures and necrotic materials are important for distinguishing SV-PTC from poorly differentiated carcinoma.
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Affiliation(s)
- M Higuchi
- Department of Laboratory Science, Kuma Hospital, Kobe, Japan
| | - M Hirokawa
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Kobe, Japan
| | - A Suzuki
- Department of Laboratory Science, Kuma Hospital, Kobe, Japan
| | - N Takada
- Department of Laboratory Science, Kuma Hospital, Kobe, Japan
| | - N Yamao
- Department of Laboratory Science, Kuma Hospital, Kobe, Japan
| | - S Kuma
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Kobe, Japan
| | - A Miyauchi
- Department of Surgery, Kuma Hospital, Kobe, Japan
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13
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Suzuki J, Hashino M, Matsumoto S, Takano A, Kawabata H, Takada N, Andoh M, Oikawa Y, Kajita H, Uda A, Watanabe K, Shimizu T, Watarai M. Detection of Francisella tularensis and analysis of bacterial growth in ticks in Japan. Lett Appl Microbiol 2016; 63:240-6. [PMID: 27432517 DOI: 10.1111/lam.12616] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 07/13/2016] [Accepted: 07/14/2016] [Indexed: 11/28/2022]
Abstract
UNLABELLED Francisella tularensis is distributed in the Northern hemisphere and it is the bacterial agent responsible for tularaemia, a zoonotic disease. We collected 4 527 samples of DNA from ticks in Japan, which were then analysed by real-time PCR and nested PCR. Francisella DNA was detected by real-time PCR in 2·15% (45/2 093) of Ixodes ovatus, 0·66% (14/2 107) of I. persulcatus, 8·22% (6/73) of I. monospinosus and 0·72% (1/138) of Haemaphysalis flava specimens. Finally, Francisella DNA was detected by nested PCR in 42 and five samples I. ovatus and I. persulcatus, respectively, which were positive according to real-time PCR. Phylogenetic analysis showed that the sequence from I. ovatus and I. persulcatus were clustered with F. tularensis type B strains distributed in Eurasia. Microinjected live F. tularensis persisted in ticks, whereas heat-killed F. tularensis decreased. Microinjected F. tularensis hlyD mutant decreased in ticks significantly compared to parent strain, thereby suggesting that HlyD in F. tularensis contributes to the adaptation or survive of bacterial infection in ticks. SIGNIFICANCE AND IMPACTS OF THE STUDY Francisella tularensis has been detected in ticks, suggesting that it is a tick-borne pathogen. However, F. tularensis has not been detected in ticks in Japan since 1991. In this study, we performed a large-scale analysis of DNA isolated from ticks in Japan and detected F. tularensis by real-time polymerase chain reaction (PCR) and nested PCR. We found that F. tularensis could survive in ticks based on an experimental tick-infection model. We also identified a bacterial factor that contributes to survival in ticks. Our results suggest that ticks are candidate vectors that mediate F. tularensis infection in Japan.
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Affiliation(s)
- J Suzuki
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Hashino
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - S Matsumoto
- Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - A Takano
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.,Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - H Kawabata
- Laboratory of Systemic Infection, Department of Bacteriology-I, National Institute of Infectious Diseases, Tokyo, Japan
| | - N Takada
- Faculty of Medical Science, University of Fukui, Eiheiji, Fukui, Japan
| | - M Andoh
- Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - Y Oikawa
- Department of Medical Zoology, Kanazawa Medical University, Kahoku, Ishikawa, Japan
| | - H Kajita
- Meat Inspection Center of Iwate Prefecture, Iwate, Japan
| | - A Uda
- Department of Veterinary Science, National Institute of Infectious Diseases, Tokyo, Japan
| | - K Watanabe
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.,Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - T Shimizu
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.,Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - M Watarai
- The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan. .,Department of Veterinary Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan.
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14
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Abstract
The development of blowing agents that exhibit lower thermal conductivity, shorter atmospheric lifetime, and less adverse effects on the atmosphere is an urgent issue. We investigated three fluorinated ethers as blowing agent alternatives [2,2,2-trifluoroethyl difluoromethyl ether (HFE-254mf), 2,2,3,3,3-pentafluoropropyl difluoromethyl ether (HFE-347mcf), and 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (HFE-347pc-f)] in terms of physical properties (boiling point and gaseous thermal conductivity), environmental adaptability (atmospheric lifetime), toxicity, flammability, solubility in polyols, and thermal stability. By using these fluorinated ethers as blowing agents, we experimentally produced rigid polyurethane foams, all of which showed thermal conductivities lower than or equal to foams produced with the blowing agent alternative candidates, HFC-245fa and cyclopentane.
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Affiliation(s)
- N. Takada
- RITE, cdo NIMC, 1-1 Higashi, Tsukuba, 305-8565 Japan
| | - R. Tamai
- RITE, cdo NIMC, 1-1 Higashi, Tsukuba, 305-8565 Japan
| | - H. Yamamoto
- RITE, cdo NIMC, 1-1 Higashi, Tsukuba, 305-8565 Japan
| | - A. Sekiya
- National Institute of Materials and Chemical Research (NIMC), Division of Organic Chemistry, 1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
| | - N. Tsukida
- Asahi Glass Co., Ltd., 3-474-2 Tsukakoshi, Sawai-ku, Kanagawa-shi, 210-0924 Japan
| | - H. Takeyasu
- Asahi Glass Co., Ltd., 3-474-2 Tsukakoshi, Sawai-ku, Kanagawa-shi, 210-0924 Japan
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15
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Suzuki A, Hirokawa M, Takada N, Masuoka H, Miyauchi A. Thyroid follicular adenoma with numerous intracytoplasmic lumina mimicking yellow bodies: a case report. Cytopathology 2016; 27:495-498. [PMID: 27146719 DOI: 10.1111/cyt.12339] [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] [Accepted: 01/17/2016] [Indexed: 11/30/2022]
Affiliation(s)
- A Suzuki
- Department of Laboratory, Kuma Hospital, Kobe, Japan
| | - M Hirokawa
- Department of Diagnostic Pathology, Kuma Hospital, Kobe, Japan
| | - N Takada
- Department of Laboratory, Kuma Hospital, Kobe, Japan
| | - H Masuoka
- Department of Surgery, Kuma Hospital, Kobe, Japan
| | - A Miyauchi
- Department of Surgery, Kuma Hospital, Kobe, Japan
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16
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Oba M, Omatsu T, Takano A, Fujita H, Sato K, Nakamoto A, Takahashi M, Takada N, Kawabata H, Ando S, Mizutani T. A novel Bunyavirus from the soft tick, Argas vespertilionis, in Japan. J Vet Med Sci 2015; 78:443-5. [PMID: 26498534 PMCID: PMC4829514 DOI: 10.1292/jvms.15-0536] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Soft ticks, Argas vespertilionis, were collected from feces of
bats in Japan. Cytopathic effect (CPE) was observed after inoculating the homogenates of
ticks to Vero cells. Sequencing of RNA extracted from the cell supernatant was performed
by next generation sequencer. The contigs had identity to segments of Bunyaviruses,
Issyk-Kul virus. The identities of segment L, M and S were only 77, 76 and 79% to
Issyk-Kul virus, respectively. Therefore, we named this novel virus Soft tick bunyavirus
(STBV). In the phylogenetic tree, segment L of STBV was closely related to a cluster
consisting of the genus Nairovirus of the family Bunyaviridae.
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Affiliation(s)
- 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, Tokyo 183-8509, Japan
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17
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Abstract
Reported here are five cases of tick bite: in a 2-year-old boy, a 3-year-old girl, a 72-year-old woman, a 29-year-old woman, and a 51-year-old man. Four cases are thought to have occurred in a mountain area while one occurred in a city garden. None were accompanied with severe systemic symptoms or deuteropathies. The parasites were identified as the adult female tick Ixodes ovatus Neumann (3 cases) and Ixodes nipponensis Kitaoka et Saito (2 cases), which are commonly distributed in Japan.
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Affiliation(s)
- S Sakai
- Department of Dermatology, Hirosaki University School of Medicine, Hirosaki, Japan
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18
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Masuzawa T, Masuda S, Fukui T, Okamoto Y, Bataa J, Oikawa Y, Ishiguro F, Takada N. PCR detection of Anaplasma phagocytophilum and Borrelia burgdorferi in Ixodes persulcatus ticks in Mongolia. Jpn J Infect Dis 2014; 67:47-9. [PMID: 24451102 DOI: 10.7883/yoken.67.47] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A molecular epidemiological survey was conducted to identify the tick-borne disease agents Anaplasma phagocytophilum and Borrelia burgdorferi sensu lato in Selenge Province, Mongolia. The survey was in response to a suspected A. phagocytophilum infection in a patient. In 2012, a total of 129 questing Ixodes persulcatus adult ticks were sampled by flagging vegetation. A. phagocytophilum and Borrelia spp. were detected by PCR, targeting the 16S rDNA (rrs) and 5S-23S intergenic spacer region, respectively. Infection rates for A. phagocytophilum and B. burgdorferi sensu lato spp. were 6.2% and 55.0%, respectively. Six of the 129 ticks (4.9%) were coinfected with A. phagocytophilum and B. burgdorferi sensu lato. Among Borrelia spp., the highest prevalence rate was that for B. garinii 20047 type (26.3%), followed by B. afzelii (7.8%) and B. garinii NT29 type (7.0%). Furthermore, ticks were detected that were dually infected with B. afzelii and B. garinii 20047 type (7.8%) and B. garinii NT29 and 20047 types (6.2%).
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Affiliation(s)
- Toshiyuki Masuzawa
- Laboratory of Microbiology and Immunology, Faculty of Pharmacy, Chiba Institute of Science
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19
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Natsuaki M, Takada N, Kawabata H, Ando S, Yamanishi K. Case of tick-associated rash illness caused byAmblyomma testudinarium. J Dermatol 2014; 41:834-6. [DOI: 10.1111/1346-8138.12594] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 07/08/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Masaru Natsuaki
- Department of Dermatology; Hyogo College of Medicine; Nishinomiya
| | | | - Hiroki Kawabata
- Department of Bacteriology I; National Institute of Infectious Diseases; Tokyo Japan
| | - Shuji Ando
- Department of Virology I; National Institute of Infectious Diseases; Tokyo Japan
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20
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Mukofujiwara Y, Sekiya I, Takada N, Hayashi Y, Shibata Y, Katuda Y. AB0369 Clinical Features of Elderly-Onset Rheumatoid Arthritis Started with the Acute Onset. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.6074] [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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21
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Masuzawa T, Uchishima Y, Fukui T, Okamoto Y, Pan MJ, Kadosaka T, Takada N. Detection of Anaplasma phagocytophilum and Anaplasma bovis in Small Wild Mammals from Taichung and Kinmen Island, Taiwan. Jpn J Infect Dis 2014; 67:111-4. [DOI: 10.7883/yoken.67.111] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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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22
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Abstract
Babesia microti protozoa were detected by light and electron microscopy in the salivary glands of field-collected Ixodes ovatus ticks; 6 of 85 adult ticks were demonstrated to be positive for B. microti DNA by polymerase chain reaction assays. In the salivary glands of unfed ticks, B. microti existed in the sporoblast stage in the granular acinus cells, and developed into the sporozoite stage during feeding on the host for 2 days. The present results indicated for the first time that I. ovatus can indeed carry B. microti and is not infected mechanically with the parasites by blood-sucking. This frequent infection of I. ovatus with B. microti demonstrates the significance of such a vector-pathogen relationship in Japan, and strongly suggests that I. ovatus is involved in the maintenance of B. microti in the fauna of Japanese rodents.
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Affiliation(s)
- Yasuhiro Yano
- Department of Pathological Sciences, Faculty of Medical Sciences, University of Fukui, Japan.
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23
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Saito-Ito A, Kasahara M, Kasai M, Dantrakool A, Kawai A, Fujita H, Yano Y, Kawabata H, Takada N. Survey ofBabesia microtiInfection in Field Rodents in Japan: Records of the Kobe-Type in New Foci and Findings of a New Type Related to the Otsu-Type. Microbiol Immunol 2013; 51:15-24. [PMID: 17237595 DOI: 10.1111/j.1348-0421.2007.tb03886.x] [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] [Indexed: 11/28/2022]
Abstract
Of 247 rodents comprising 5 genera and 7 species collected at 17 sites throughout Japan from 2003 to 2005, Babesia microti was detected microscopically and by polymerase chain reaction (PCR) in 36 rodents comprising 2 genera and 3 species from 12 sites. Based on the analysis of small subunit ribosomal RNA gene (SSUrDNA) sequences, the Kobe-type, the etiological type of the first Japanese case of human infection was found in Apodemus speciosus and Apodemus argenteus in Aomori, the northernmost prefecture of the Japanese mainland, while the U.S.-type was found on Hokkaido Island and the Otsu-type was widely distributed. In addition, a new Otsu-related type was detected exclusively in Eothenomys andersoni in Nagano, a prefecture in central Japan. The sequences of internal transcribed spacer 1 to 2 (ITS1/2) of the present Kobe- and Otsu-types were almost identical to those of the same types previously identified. The ITS1/2 sequence of the U.S.-type identified in Hokkaido in this survey was somewhat different from that of the U.S.-type strain originating from the U.S.A., with approximately 95% identity. This value was similar to the 94% identity found between the ITS1/2 sequences of the Otsu-type and the new Otsu-related type. The new Otsu-related type of B. microti was isolated as the Nagano strain, which was serologically differentiated from the other type strains of B. microti. The divergence and distribution of genotypes are important factors in investigating the epidemiology of human B. microti infection in Japan.
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MESH Headings
- Animals
- Babesia microti/classification
- Babesia microti/genetics
- Babesia microti/isolation & purification
- Babesiosis/epidemiology
- Babesiosis/parasitology
- Babesiosis/veterinary
- Cricetinae
- DNA, Intergenic/analysis
- DNA, Intergenic/chemistry
- DNA, Intergenic/genetics
- DNA, Protozoan/analysis
- DNA, Protozoan/chemistry
- DNA, Protozoan/genetics
- DNA, Ribosomal/analysis
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Japan/epidemiology
- Molecular Epidemiology
- Molecular Sequence Data
- Phylogeny
- Polymerase Chain Reaction
- Rodent Diseases/epidemiology
- Rodent Diseases/parasitology
- Rodentia
- Sequence Analysis, DNA
- Sequence Homology, Nucleic Acid
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Affiliation(s)
- Atsuko Saito-Ito
- Section of Parasitology, Division of Microbiology, Kobe University Graduate School of Medicine, Japan.
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24
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Yano Y, Fujita H, Takada N. Ultrastructure of a Japanese Rickettsial Strain Genetically Identified asRickettsia helveticaWhich Was Originally Found in Europe. Microbiol Immunol 2013; 48:535-9. [PMID: 15272199 DOI: 10.1111/j.1348-0421.2004.tb03549.x] [Citation(s) in RCA: 5] [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: 11/27/2022]
Abstract
A rickettsial strain IO-1 has been isolated from a tick, Ixodes ovatus, in Japan and genetically identified as Rickettsia helvetica, a member of the spotted fever group rickettsiae. Ultrastructural observations were made on the microorganism. The ultrastructure of R. helvetica IO-1 appeared to be generally the same as that previously shown for other rickettsiae of the spotted fever and typhus groups. The rickettsiae were primarily found free in the cytoplasm of L929 cultured cells. Occasionally, the rickettsiae may also invade the host cell nucleus; however, the frequency of the nuclear localization was very low.
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Affiliation(s)
- Yasuhiro Yano
- Department of Pathological Sciences, Faculty of Medical Sciences, University of Fukui, Fukui 910-1193, Japan.
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25
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Arai S, Tabara K, Yamamoto N, Fujita H, Itagaki A, Kon M, Satoh H, Araki K, Tanaka-Taya K, Takada N, Yoshikawa Y, Ishihara C, Okabe N, Oishi K. Molecular phylogenetic analysis of Orientia tsutsugamushi based on the groES and groEL genes. Vector Borne Zoonotic Dis 2013; 13:825-9. [PMID: 24107204 DOI: 10.1089/vbz.2012.1155] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
DNA sequences encoding the GroES and GroEL proteins of Orientia tsutsugamushi were amplified by the PCR and sequenced. Pairwise alignment of full-length groES and groEL gene sequences indicated high sequence similarity (90.4-100% and 90.3-100%) in O. tsutsugamushi, suggesting that these genes are good candidates for the molecular diagnosis and phylogenetic analysis of scrub typhus. Comparisons of the 56-kD type-specific antigen (TSA) protein gene and the groES and groEL genes showed that genotypes based on the 56-kD TSA gene were not related to a cluster containing the groES and groEL genes in a dendrogram, suggesting that a gene rearrangement may be associated with homologous recombination in mites.
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Affiliation(s)
- Satoru Arai
- 1 Infectious Disease Surveillance Center, National Institute of Infectious Diseases , Tokyo, Japan
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26
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Gaowa, Ohashi N, Aochi M, Wuritu D, Wu, Yoshikawa Y, Kawamori F, Honda T, Fujita H, Takada N, Oikawa Y, Kawabata H, Ando S, Kishimoto T. Rickettsiae in ticks, Japan, 2007–2011. Emerg Infect Dis 2013; 19:338-40. [PMID: 23460996 PMCID: PMC3559048 DOI: 10.3201/eid1902.120856] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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27
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Ikegaya S, Iwasaki H, Takada N, Yamamoto S, Ueda T. Tsutsugamushi disease caused by Shimokoshi-type Orientia tsutsugamushi: the first report in Western Japan. Am J Trop Med Hyg 2013; 88:1217-9. [PMID: 23589529 DOI: 10.4269/ajtmh.12-0740] [Citation(s) in RCA: 4] [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] [Indexed: 11/07/2022] Open
Abstract
An 85-year-old female farmer was admitted to our hospital for fever, general fatigue, and skin rash. Cephalosporin was not effective and minocycline was dramatically effective. An eschar was discovered on her inguinal region after the defervescence. Laboratory examination of serum taken 12 days after onset of the illness showed elevated titers of antibodies against the Shimokoshi strain of Orientia tsutsugamushi. The gene sequence analysis of specimen from the patient's eschar revealed high similarity to the Shimokoshi strain by nested polymerase chain reaction. Therefore, this patient was diagnosed as a case of Shimokoshi-type tsutsugamushi disease, which has not previously been reported in Western Japan. Recently, cases of this type have also been confirmed in northeastern Japan, suggesting the need for further epidemiological studies.
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Affiliation(s)
- Satoshi Ikegaya
- Division of Hematology and Oncology, Division of Infection Control and Senior Fellow Laboratory, University of Fukui, Fukui, Japan.
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28
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Tsujiyama S, Muraoka T, Takada N. Biodegradation of 2,4-dichlorophenol by shiitake mushroom (Lentinula edodes) using vanillin as an activator. Biotechnol Lett 2013; 35:1079-83. [DOI: 10.1007/s10529-013-1179-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 02/26/2013] [Indexed: 11/29/2022]
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29
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Tokiwa T, Harunari T, Tanikawa T, Komatsu N, Koizumi N, Tung KC, Suzuki J, Kadosaka T, Takada N, Kumagai T, Akao N, Ohta N. Phylogenetic relationships of rat lungworm, Angiostrongylus cantonensis, isolated from different geographical regions revealed widespread multiple lineages. Parasitol Int 2012; 61:431-6. [DOI: 10.1016/j.parint.2012.02.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 02/14/2012] [Accepted: 02/18/2012] [Indexed: 11/16/2022]
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30
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Yoshitoshi EY, Yoshizawa A, Ogawa E, Kaneshiro M, Takada N, Okamoto S, Fujimoto Y, Sakamoto S, Masuda S, Matsuura M, Nakase H, Chiba T, Tsuruyama T, Haga H, Uemoto S, Uemoto S. The challenge of acute rejection in intestinal transplantation. Pediatr Surg Int 2012; 28:855-9. [PMID: 22760434 DOI: 10.1007/s00383-012-3110-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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] [Accepted: 05/30/2012] [Indexed: 10/28/2022]
Abstract
Early diagnosis and treatment of acute cellular rejection (ACR) after intestinal transplantation (ITx) is challenging. We report the outcome of three patients: two presented mild ACR improved with steroids. One presented steroid-resistant severe rejection, improved after rabbit anti-thymocyte globulin (r-ATG), but unfortunately died for encephalitis caused by opportunistic infections.
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Affiliation(s)
- E Y Yoshitoshi
- Department of Hepatobiliary, Pancreas, Transplantation and Pediatric Surgery, Kyoto University Hospital, Graduate School of Medicine, 54 Kawara-cho, Shogoin, Sakyo-ku, Kyoto city, 606-8507, Japan.
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Takada N, Otsuka T, Yamada K, Suzuki H, Hasuo T, Kondo A, Fukuta M. Minimally invasive plate osteosynthesis for distal radius fractures with a palmar locking plate. Eur J Trauma Emerg Surg 2012; 38:627-32. [PMID: 26814548 DOI: 10.1007/s00068-012-0204-z] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 06/12/2012] [Indexed: 10/28/2022]
Abstract
PURPOSE Since 2006, we have been performing minimally invasive plate osteosynthesis with a palmar locking plate and without division of the pronator quadratus muscle for repairing distal radial fractures. The purpose of this study was to present the surgical technique we have developed and to retrospectively evaluate the clinical outcomes. METHODS Twenty patients were treated with this technique between January and December 2007. The range of motion of the wrist and forearm, grip strength, and the quick disability of the arm, shoulder, and hand score were assessed at the latest follow-up examination, and postoperative complications were evaluated. RESULTS The average ranges of flexion and extension of the wrist were 55° and 60°, respectively. The average ranges of supination and pronation of the forearm were 88° and 86°, respectively. The average grip strength of the treated side was 71 % of that of the uninjured side. The average quick disability of the arm, shoulder, and hand score was 13.4 points. No patient had loss of fracture reduction, implant failure, deep infection, or tendon or nerve problems. CONCLUSIONS The small skin incisions of this technique are advantageous from the aesthetic viewpoint. Minimally invasive plate osteosynthesis is one of the options for the treatment of distal radial fractures.
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Affiliation(s)
- N Takada
- Department of Orthopaedic Surgery, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8602, Japan.
| | - T Otsuka
- Department of Orthopaedic Surgery, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8602, Japan
| | - K Yamada
- Department of Orthopaedic Surgery, Komaki City Hospital, 1-20 Jyobushi, Komaki, Aichi, 485-0852, Japan
| | - H Suzuki
- Department of Orthopaedic Surgery, Komaki City Hospital, 1-20 Jyobushi, Komaki, Aichi, 485-0852, Japan
| | - T Hasuo
- Department of Orthopaedic Surgery, Komaki City Hospital, 1-20 Jyobushi, Komaki, Aichi, 485-0852, Japan
| | - A Kondo
- Department of Orthopaedic Surgery, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8602, Japan
| | - M Fukuta
- Department of Orthopaedic Surgery, Nagoya City University, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8602, Japan
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Gaowa, Wuritu, Wu D, Yoshikawa Y, Ohashi N, Kawamori F, Sugiyama K, Ohtake M, Ohashi M, Yamamoto S, Kitano T, Takada N, Kawabata H. Detection and Characterization of <i>p44/msp2</i> Transcript Variants of <i>Anaplasma phagocytophilum</i> from Naturally Infected Ticks and Wild Deer in Japan. Jpn J Infect Dis 2012. [DOI: 10.7883/yoken.65.79] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Gaowa
- Laboratory of Microbiology, Department of Food and Nutritional Sciences, Graduate School of Nutritional and Environmental Sciences, Global Center of Excellence Program, University of Shizuoka, Japan
| | - Wuritu
- Laboratory of Microbiology, Department of Food and Nutritional Sciences, Graduate School of Nutritional and Environmental Sciences, Global Center of Excellence Program, University of Shizuoka, Japan
| | - Dongxing Wu
- Laboratory of Microbiology, Department of Food and Nutritional Sciences, Graduate School of Nutritional and Environmental Sciences, Global Center of Excellence Program, University of Shizuoka, Japan
| | - Yuko Yoshikawa
- Laboratory of Microbiology, Department of Food and Nutritional Sciences, Graduate School of Nutritional and Environmental Sciences, Global Center of Excellence Program, University of Shizuoka, Japan
| | - Norio Ohashi
- Laboratory of Microbiology, Department of Food and Nutritional Sciences, Graduate School of Nutritional and Environmental Sciences, Global Center of Excellence Program, University of Shizuoka, Japan
| | - Fumihiko Kawamori
- Department of Microbiology, Shizuoka Institute of Environment and Hygiene, Japan
| | - Kanji Sugiyama
- Department of Microbiology, Shizuoka Institute of Environment and Hygiene, Japan
| | - Masayoshi Ohtake
- Forestry and Forest Products Research Center, Shizuoka Prefectural Research Institute of Agriculture and Forestry, Japan
| | - Masataka Ohashi
- Forestry and Forest Products Research Center, Shizuoka Prefectural Research Institute of Agriculture and Forestry, Japan
| | - Seigo Yamamoto
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Japan
| | - Tomokazu Kitano
- Department of Microbiology, Miyazaki Prefectural Institute for Public Health and Environment, Japan
| | - Nobuhiro Takada
- Department of Immunology and Medical Zoology, Faculty of Medical Science, University of Fukui, Japan
| | - Hiroki Kawabata
- Department of Bacteriology I, National Institute of Infectious Diseases, Japan
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Arai S, Gu SH, Baek LJ, Tabara K, Bennett SN, Oh HS, Takada N, Kang HJ, Tanaka-Taya K, Morikawa S, Okabe N, Yanagihara R, Song JW. Divergent ancestral lineages of newfound hantaviruses harbored by phylogenetically related crocidurine shrew species in Korea. Virology 2012; 424:99-105. [PMID: 22230701 DOI: 10.1016/j.virol.2011.11.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 11/15/2011] [Accepted: 11/15/2011] [Indexed: 12/24/2022]
Abstract
Spurred by the recent isolation of a novel hantavirus, named Imjin virus (MJNV), from the Ussuri white-toothed shrew (Crocidura lasiura), targeted trapping was conducted for the phylogenetically related Asian lesser white-toothed shrew (Crocidura shantungensis). Pair-wise alignment and comparison of the S, M and L segments of a newfound hantavirus, designated Jeju virus (JJUV), indicated remarkably low nucleotide and amino acid sequence similarity with MJNV. Phylogenetic analyses, using maximum likelihood and Bayesian methods, showed divergent ancestral lineages for JJUV and MJNV, despite the close phylogenetic relationship of their reservoir soricid hosts. Also, no evidence of host switching was apparent in tanglegrams, generated by TreeMap 2.0β.
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Affiliation(s)
- Satoru Arai
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Toyama 1-23-1, Shinjuku, Tokyo 162-8640, Japan
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Wu D, Yoshikawa Y, Ohashi N, Kawamori F, Sugiyama K, Ohtake M, Ohashi M, Yamamoto S, Kitano T, Takada N, Kawabata H. Detection and characterization of p44/msp2 transcript variants of Anaplasma phagocytophilum from naturally infected ticks and wild deer in Japan. Jpn J Infect Dis 2012; 65:79-83. [PMID: 22274164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Anaplasma phagocytophilum is an obligate intracellular bacterium and causes a febrile illness in humans and livestock. In nature, this bacterium is sustained in a tick-mammal cycle. Several p44/msp2-related genes are expressed from a single expression locus by gene conversion. In this study, we obtained 119 cDNA sequences of p44/msp2 transcripts from A. phagocytophilum in 6 Haemaphysalis ticks and 3 wild sika deer (Cervus nippon) in Japan. These 119 sequences were classified into 36 different variant sequences based on their similarities. The 36 cDNA sequences were phylogenetically grouped into 2 major clusters--tick- and deer-associated. The tick-associated sequences were further classified into 4 distinct subclusters, suggesting that A. phagocytophilum in ticks seems to selectively express specific p44/msp2 transcripts, such as the transcripts in the 4 subclusters that were closely related to previously identified p44/msp2 genes. The deer-associated sequences were also grouped into 4 subclusters, but these transcripts were probably more diverse than the transcripts derived from ticks. This might be due to the relatively nonselective expression of p44/msp2 in deer or the strain differences in A. phagocytophilum from ticks and deer in separate geographic regions or both. Thus, this study may contribute to the understanding of A. phagocytophilum p44/msp2 expression in nature in Japan.
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Seki T, Harada H, Takada N, Mochizuki T, Hotta K, Sato T, Murahashi N, Togashi M. MP-14.9 Open Conversion Cases During Laparoscopic Surgery: The Sappro City General Hospital Experience. Urology 2011. [DOI: 10.1016/j.urology.2011.07.331] [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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Kanda T, Imazeki F, Yonemitsu Y, Mikami S, Takada N, Nishino T, Takashi M, Tsubota A, Kato K, Sugiura N, Tawada A, Wu S, Tanaka T, Nakamoto S, Mikata R, Tada M, Chiba T, Kurihara T, Arai M, Fujiwara K, Kanai F, Yokosuka O. Quantification of hepatitis C virus in patients treated with peginterferon-alfa 2a plus ribavirin treatment by COBAS TaqMan HCV test. J Viral Hepat 2011; 18:e292-7. [PMID: 21129130 DOI: 10.1111/j.1365-2893.2010.01409.x] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Extremely low levels of serum hepatitis C virus (HCV) RNA can be detected by COBAS TaqMan HCV test. To investigate whether the COBAS TaqMan HCV test is useful for measuring rapid virological response (RVR) and early virological response (EVR) to predict sustained virological response (SVR), we compared the virological response to PEG-IFN-alfa 2a plus RBV in 76 patients infected with HCV genotype 1 when undetectable HCV RNA by the COBAS TaqMan HCV test was used, with those when below 1.7 log IU/mL HCV RNA by COBAS TaqMan HCV test was used, which corresponded to the use of traditional methods. Among the 76 patients, 28 (36.8%) had SVR, 13 (17.1%) relapsed, 19 (25.0%) did not respond, and 16 (21.0%) discontinued the treatment due to side effects. The positive predictive values for SVR based on undetectable HCV RNA by COBAS TaqMan HCV test at 24 weeks after the end of treatment [10/10 (100%) at week 4, 21/23 (91.3%) at week 8 and 26/33 (78.7%) at week 12] were superior to those based on <1.7 log IU/mL HCV RNA [17/19 (89.4%) at week 4, 27/38 (71.0%) at week 8, and 27/43 (62.7%) at week 12]. The negative predictive values for SVR based on <1.7 log IU/mL HCV RNA by COBAS TaqMan HCV test [46/57 (80.7%) at week 4, 37/38 (97.3%) at week 8, and 32/33 (96.9%) at week 12] were superior to those based on undetectable HCV RNA [48/66 (72.7%) at week 4, 46/53 (86.7%) at week 8, and 41/43 (95.3%) at week 12]. The utilization of both undetectable RNA and <1.7 log IU/mL HCV RNA by COBAS TaqMan HCV test is useful and could predict SVR and non-SVR patients with greater accuracy.
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Affiliation(s)
- T Kanda
- Department of Medicine and Clinical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan.
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Ohmori S, Kawai A, Takada N, Saito-Ito A. Development of real-time PCR assay for differential detection and quantification for multiple Babesia microti-genotypes. Parasitol Int 2011; 60:403-9. [PMID: 21723958 DOI: 10.1016/j.parint.2011.06.021] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 05/25/2011] [Accepted: 06/20/2011] [Indexed: 10/18/2022]
Abstract
We have developed a real-time PCR assay that can rapidly and differentially detect and quantify four genotypes of small subunit ribosomal RNA gene (SSUrDNA) of Babesia microti (Kobe-, Otsu-, Nagano- and US-types). In this assay, four genotype-specific pairs of primers targeted on internal transcribed spacer (ITS) 1 or 2 sequences were used and amplicons by each pair of primers were quantitatively detected by fluorescent SYBR Green I. The four genotype-specific pairs of primers displayed the high specificity for homologous genotype DNA. The standard curves of cycle threshold (Ct) values versus amount of target DNA per reaction (log) for all four genotypes were linear and the correlation coefficient (Rsq) values for the curves were from 0.970 to 0.997. The standard curves were almost identical even in the presence of heterologous genotype DNA. This assay could detect 10-30 fg purified DNA (equivalent to the amount of 1-5 parasite DNA) of each genotype B. microti. This assay could also detect each genotype B. microti infection in blood with 3×10(-6)%-1×10(-5)% parasitemia. This assay was applicable to field rodent and tick samples to reveal mixed infection in several samples, for which a single genotype of B. microti had been detected by direct sequencing analyses in our previous studies. This assay also seemed to be applicable to clinical human samples, showing Kobe-type positive results for the first Japanese babesiosis patient and the asymptomatic donor, both infected with Kobe-type B. microti.
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Affiliation(s)
- Shiho Ohmori
- Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Hyogo, Japan
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Takada N, Abe T, Maruyama S, Sazawa A, Shinohara N, Seki T, Togashi M, Nonomura K. Perioperative morbidity and mortality in patients treated by radical cystectomy: A multi-institutional retrospective study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.7_suppl.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
270 Background: It is well known that radical cystectomy is associated with comparatively high perioperative morbidity and mortality. In the present study, we collected data of perioperative outcomes from Hokkaido University Graduate School of Medicine and our teaching hospitals and assessed the complications and death rate within 90 days after radical cystectomy. Methods: We collected clinical data of 970 patients undergoing radical cystectomy for nonmetastatic bladder cancer in 21 institutions between 1999 and 2009. We then assessed 90-day complications and death after radical cystectomy. The complications were classified according to the modified Clavien classification. Over 40 variables were included in the analysis, including age, ASA score, BMI, comorbidity, neoadjuvant chemotherapy, clinical stage, type of urinary diversion, operative time, estimated blood loss, transfusion, and hospital stay. Statistical analysis was performed utilizing Student's t-tests, chi-square tests, and logistic regression analysis. Results: The median patient age was 70 (range, 25-91) years old. 62.5% of patients had an ASA score≥2. Regarding the urinary diversion, ileal conduit was performed in 523 (53.6%) patients, neobladder in 178 (18.4%), ureterocutaneostomy in 255 (26.3%). Median operative time was 399 (range, 100-927) minutes. Median hospital stay was 39 (0-364) days. Regarding the complications, 660 (68%) patients experienced at least one complication and death rate within 90 days after surgery was 1.34% (n=13), respectively. Of the complications, 34.1% was classified as grade 1, 41.5% as grade 2, 20.1% as grade 3, 1.1% as grade 4, 1.2% as grade 5. Multivariate analysis identified age≥70 (odds ratio 1.41), urinary diversion utilizing intestine (OR 1.58) and operative time ≥ 400 (OR 1.54) were independent risk factors. Conclusions: Death rate was 1.34%, which was compatible to reports form western high- volume centers. About two-thirds of the patients experienced at least one complication, although they were mostly classified as grade 2 or less. Age, urinary diversion, and operative time were significant risk factors for perioperative complications after radical cystectomy. No significant financial relationships to disclose.
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Affiliation(s)
- N. Takada
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - T. Abe
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - S. Maruyama
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - A. Sazawa
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - N. Shinohara
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - T. Seki
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - M. Togashi
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
| | - K. Nonomura
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Sapporo City General Hospital, Sapporo, Japan
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Ando S, Kurosawa M, Sakata A, Fujita H, Sakai K, Sekine M, Katsumi M, Saitou W, Yano Y, Takada N, Takano A, Kawabata H, Hanaoka N, Watanabe H, Kurane I, Kishimoto T. Human Rickettsia heilongjiangensis infection, Japan. Emerg Infect Dis 2010; 16:1306-8. [PMID: 20678332 PMCID: PMC3298298 DOI: 10.3201/eid1608.100049] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
A case of Rickettsia heilongjiangensis infection in Japan was identified in a 35-year-old man who had rash, fever, and eschars. Serum contained R. heilongjiangensis antibodies, and eschars contained R. heilongjiangensis DNA. R. heilongjiangensis was also isolated from ticks in the suspected geographic area of infection.
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Affiliation(s)
- Shuji Ando
- National Institute of Infectious Diseases, Tokyo, Japan.
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Abe T, Shinohara N, Muranaka M, Sazawa A, Maruyama S, Osawa T, Harabayashi T, Kubota K, Matsuno Y, Shibata T, Toyada Y, Shinno Y, Minami K, Sakashita S, Kumagai A, Takada N, Togashi M, Sano H, Mori T, Nonomura K. Role of lymph node dissection in the treatment of urothelial carcinoma of the upper urinary tract: multi-institutional relapse analysis and immunohistochemical re-evaluation of negative lymph nodes. Eur J Surg Oncol 2010; 36:1085-91. [PMID: 20832972 DOI: 10.1016/j.ejso.2010.08.134] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 06/11/2010] [Accepted: 08/19/2010] [Indexed: 01/11/2023] Open
Abstract
AIM To determine the role of lymph node dissection (LND) in the treatment of urothelial carcinoma (UC) of the upper urinary tract (UUT). PATIENTS AND METHODS [Study-1] A retrospective multi-institutional study evaluated 293 patients undergoing predominantly nephroureterectomy for UC of the UUT. Of 293 patients, 267 patients had pure UC and 26 demonstrated other histological components. Regarding the pathological node status, 130 patients had pN0 disease, 141 patients had pNx disease and 22 patients had pN+ disease. The sites of initial recurrence and time to first recurrence were reviewed. The sites of recurrence were classified as locoregional or distant recurrence. The relationship between node status and future recurrence was analyzed. [Study-2] Fifty-one patients treated by nephroureterectomy at Hokkaido University Hospital were included. All had LND and all LNs were negative on hematoxylin and eosin staining. We re-evaluated the presence of micrometastasis in LND specimens by anti-cytokeratin immunohistochemistory. RESULTS [Study-1] Of 293 patients, 76 developed disease relapse. Regional lymph node recurrence was the most common site (34 patients). On multivariate analyses that adjusted for the effect of tumor stage and tumor grade, pNx (skipping LND) was an adverse factor not only for locoregional recurrence, but also for distant relapse. [Study-2] Immunohistochemistry identified micrometastases in 7 (14%) of 51 patients. Regarding survival, 5 of these 7 patients with micrometastases were alive at last follow-up. CONCLUSIONS On relapse analysis, skipping LND was an adverse factor not only for locoregional recurrence, but also for distant relapse. Immunohistochemistry detected micrometastases in about 14% of patients previously diagnosed as pN0. These findings further support a potential therapeutic benefit of LND by eliminating micrometastases.
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Affiliation(s)
- T Abe
- Department of Urology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
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Iwasaki H, Mizoguchi J, Takada N, Tai K, Ikegaya S, Ueda T. Correlation between the concentrations of tumor necrosis factor-alpha and the severity of disease in patients infected with Orientia tsutsugamushi. Int J Infect Dis 2009; 14:e328-33. [PMID: 19699129 DOI: 10.1016/j.ijid.2009.06.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2009] [Revised: 05/31/2009] [Accepted: 06/01/2009] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Patients with tsutsugamushi disease sometimes die if they do not receive appropriate chemotherapy. This study measured the concentration of several cytokines both before and after the administration of tetracyclines, and evaluated the changes in cytokine levels in patient serum to investigate the relationship between serum levels of cytokines and disease severity. METHODS A total of nine patients were infected with Orientia tsutsugamushi. The diagnosis of tsutsugamushi disease was made using an indirect immunoperoxidase antibody test. The serum concentrations of cytokines were measured using enzyme-linked immunosorbent assays. RESULTS The levels of interleukin (IL)-10 (mean 71.7 pg/ml) and IL-12p40 (mean 588 pg/ml) were elevated in all patients in the acute phase, above the normal upper limits. Tumor necrosis factor-alpha (TNF-alpha) levels (mean 9.20 pg/ml) were elevated in 89% and interferon-gamma (IFN-gamma) levels (mean 41.0 pg/ml) in 44% of patients. The down-regulation of these overproduced cytokines was observed after chemotherapy. There was a significant correlation between the concentrations of TNF-alpha in the acute phase and the severity of disease (r=0.918). CONCLUSION The concentration of TNF-alpha may predict the severity of tsutsugamushi disease in the acute infectious phase.
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Affiliation(s)
- Hiromichi Iwasaki
- First Department of Internal Medicine, Faculty of Medical Science, University of Fukui, Matsuoka, Fukui, Japan.
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Takada N, Fujita H, Kawabata H, Ando S, Sakata A, Takano A, Chaithong U. Spotted fever group Rickettsia sp. closely related to Rickettsia japonica, Thailand. Emerg Infect Dis 2009; 15:610-1. [PMID: 19331747 DOI: 10.3201/eid1504.071271] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Takada N, Fujita H, Kawabata H, Ando S, Sakata A, Takano A, Chaithong U. Spotted Fever Group Rickettsiasp. Closely Related to R. japonica,Thailand. Emerg Infect Dis 2009. [PMID: 19331747 PMCID: PMC2671449 DOI: 10.3201/eid1504.081271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Sakurai M, Todaka K, Takada N, Kamigaki S, Anami S, Shikata A, Ueno H, Iseki C, Fujii C, Fujino M, Yamamura J, Masuda H, Ishitobi M, Nakayama T, Masuda N. Multicenter phase II study of a frozen glove to prevent docetaxel-induced onycholysis and cutaneous toxicity for the breast cancer patients (Kinki Multidisciplinary Breast Oncology Group: KMBOG-0605). Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-4093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #4093
Background: We have learned from the questionnaire survey of description and hearing type that the onycholysis and skin toxicity occur in approximately 90% of patients(pts) treated with docetaxel (DTX) on hands and 65% on feet. Besides neurotoxicity and edema, these adverse events cause the worse quality of life (QOL) assessment because of the exposure, public noticed site. According to the report that the Elasto-Gel frozen glove (FG) was effective for the prevention of DTX-induced onycholysis and skin toxicity (Scotte F, JCO 23, 4424-29, 2005), we have planned to reanalyze the efficacy and safety of FG for Japanese breast cancer pts by the multicenter, prospective phase II study.
 Patients and Methods: Patients receiving DTX 75 mg/m2 alone or in combination chemotherapy more than 4 cycles were eligible for this case-control study. Each patient on case group wore an FG for a total of 90 minutes on the both hands. Her feet were not protected. The control data was obtained by the questionnaire survey from the pts who had not used FG during the chemotherapy. Onycholysis and skin toxicity were assessed at each cycle by National Cancer Institute Common Toxicity Criteria and documented by photography. This study had accomplished by multidisciplinary approach by nurses, pharmacists, and doctors. Wilcoxon matched-pairs rank test was used.
 Results: Between March 2006 and May 2007, 70 pts on case and 52 pts on control were evaluated. Median age were similar for each group, 52 [29-74 years] on case and 51 [25-73 years] on control. Onycholysis and skin toxicity were significantly lower in the FG-protected hands compared with the control hands (P = .0001). Onycholysis was grade (G) 0 in 41% v 8%, G1 in 54% v 74%, and G2 to 3 in 4.3% v 18% for the FG-protected hands and the control hands, respectively. For the feet, there was no difference in frequency between pts on case and on control. Skin toxicity was G0 in 76.6% v 44%, G1 in 13.6% v 42%, and G2 to 3 in 4.4% v 14% for the FG-protected hands and the control, respectively. 32 pts (46%) had experienced the deterioration of pigmentation on hands and/or feet, the FG had seemed not to be able to prevent these unfavorable events. Median time to nail and skin toxicity occurrence was not significantly different between the FG-protected and the control hands of feet, respectively. Although one pt (1.4%) experienced discomfort due to cold intolerance, there were no serious adverse events caused by FG.
 Conclusion: FG significantly reduces the nail and skin toxicity associated with DTX and is a safety tool on supportive care management. This should be provided in general practice widely to improve a patient's QOL.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 4093.
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Affiliation(s)
- M Sakurai
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
| | - K Todaka
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
| | - N Takada
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - S Kamigaki
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - S Anami
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - A Shikata
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
| | - H Ueno
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
| | - C Iseki
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - C Fujii
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - M Fujino
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - J Yamamura
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
| | - H Masuda
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
| | - M Ishitobi
- 3 Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - T Nakayama
- 2 Breast Oncology Group, Sakai Municipal Hospital, Sakai, Japan
| | - N Masuda
- 1 Breast Oncology Group, Osaka National Hospital, Osaka, Japan
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Mahara F, Takada N. Vector and Epidemiology. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.096] [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: 10/21/2022] Open
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Affiliation(s)
- T Sato
- Dept of Chemistry and Materials Technology, Kyoto Institute of Technology, Japan
| | - N Takada
- Dept of Chemistry and Materials Technology, Kyoto Institute of Technology, Japan
| | - M Ueda
- Dept of Chemistry and Materials Technology, Kyoto Institute of Technology, Japan
| | - T Nakamura
- Dept of Life Science, Nara Saho Jogakuin College, Japan
| | - M R Luo
- Design Research Centre, University of Derby, UK
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Ishiguro F, Takada N, Fujita H, Noji Y, Yano Y, Iwasaki H. Survey of the vectorial competence of ticks in an endemic area of spotted fever group rickettsioses in Fukui Prefecture, Japan. Microbiol Immunol 2008; 52:305-9. [PMID: 18577164 DOI: 10.1111/j.1348-0421.2008.00042.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The prevalence of SFGR in ixodid ticks in the Mt. Arashima-dake area in the northern part of Fukui Prefecture was surveyed, because of strong suspicions that the first case identified in this Prefecture had become infected with R. helvetica in this region. The ticks identified consisted of three genera and six species; I.ovatus, I. persulcatus, I. monospinosus, H. flava, H. japonica and D. taiwanensis. Of all 222 ticks collected, only I. monospinosus ticks (8 of 32 examined) were positive for SFGR isolates, which were genetically identified as R. helvetica. Ticks (157 of all 222) positive for SFGR-DNA fragments consisted of I. monospinosus (14 of 32), I. persulcatus (11 of 55), I. ovatus (3 of 38), H. flava (5 of 21) and H. japonica (2 of 9). Of these, thirteen I. monospinosus, eight I. persulcatus, three I. ovatus, two H. flava and one H. japonica were identified by nucleotide sequences as positive for R. helvetica. DNA fragments from three H. flava and one H. japonica showed greater homology to R. japonica than to R. helvetica or R. asiatica. The present results indicate that it is most likely that the vector tick of R. helvetica infection in Fukui Prefecture is I. monospinosus.
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Affiliation(s)
- Fubito Ishiguro
- Fukui Prefectural Institute of Health and Environmental Science, Fukui, Fuku 910-8551, Japan.
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48
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Inoue K, Maruyama S, Kabeya H, Yamada N, Ohashi N, Sato Y, Yukawa M, Masuzawa T, Kawamori F, Kadosaka T, Takada N, Fujita H, Kawabata H. Prevalence and genetic diversity of Bartonella species isolated from wild rodents in Japan. Appl Environ Microbiol 2008; 74:5086-92. [PMID: 18606803 PMCID: PMC2519277 DOI: 10.1128/aem.00071-08] [Citation(s) in RCA: 60] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Accepted: 06/08/2008] [Indexed: 11/20/2022] Open
Abstract
Here, we describe for the first time the prevalence and genetic properties of Bartonella organisms in wild rodents in Japan. We captured 685 wild rodents throughout Japan (in 12 prefectures) and successfully isolated Bartonella organisms from 176 of the 685 rodents (isolation rate, 25.7%). Those Bartonella isolates were all obtained from the rodents captured in suburban areas (rate, 51.8%), but no organism was isolated from the animals captured in city areas. Sequence analysis of rpoB and gltA revealed that the Bartonella isolates obtained were classified into eight genetic groups, comprising isolates closely related to B. grahamii (A-I group), B. tribocorum and B. elizabethae (B-J group), B. tribocorum and B. rattimassiliensis (C-K group), B. rattimassiliensis (D-L group), B. phoceensis (F-N group), B. taylorii (G-O group), and probably two additional novel Bartonella species groups (E-M and H-P). B. grahamii, which is one of the potential causative agents of human neuroretinitis, was found to be predominant in Japanese rodents. In terms of the relationships between these Bartonella genetic groups and their rodent species, (i) the A-I, E-M, and H-P groups appear to be associated with Apodemus speciosus and Apodemus argenteus; (ii) the C-K, D-L, and F-N groups are likely implicated in Rattus rattus; (iii) the B-J group seems to be involved in Apodemus mice and R. rattus; and (iv) the G-O group is probably associated with A. speciosus and Clethrionomys voles. Furthermore, dual infections with two different genetic groups of bartonellae were found in A. speciosus and R. rattus. These findings suggest that the rodent in Japan might serve as a reservoir of zoonotic Bartonella infection.
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Affiliation(s)
- Kai Inoue
- Laboratory of Veterinary Public Health, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
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Takada N, Yamaguchi H, Shida K, Terajima D, Satou Y, Kasuya A, Satoh N, Satake M, Wang HG. The cell death machinery controlled by Bax and Bcl-XL is evolutionarily conserved in Ciona intestinalis. Apoptosis 2008; 10:1211-20. [PMID: 16215691 DOI: 10.1007/s10495-005-1391-4] [Citation(s) in RCA: 12] [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: 10/25/2022]
Abstract
Bax and Bcl-XL are key regulators of apoptosis in mammals. Here we report the functional characterization of two Bcl-2 homologues, ciBax and ciBcl-XL, in a basal invertebrate-chordate ascidian Ciona intestinalis. CiBax is a Ciona homologue of the BH1-3 pro-apoptotic protein Bax, whereas ciBcl-XL is a Bcl-XL-like anti-apoptotic protein. Molecular modeling analysis showed that ciBax and ciBcl-XL share both sequence and structural similarities to human Bax and Bcl-XL, respectively. Like their human counterparts, ciBax could form a homodimer or oligomers as well as heterodimerize with ciBcl-XL, and overexpression of ciBax caused apoptosis that could be attenuated by ciBcl-XL. Mutagenesis studies showed that the BH3 domain of ciBax is critical for its cell death-inducing function and also for its interaction with ciBcl-XL. In Ciona embryos, ectopic expression of ciBax but not its BH3 deletion mutant resulted in cell dissociation and apoptosis after late gastrula stage of embryonic development. Moreover, not only wild type ciBcl-XL but also a mutant ciBcl-XL(F101V), which is unable to interact with ciBax, could block cell dissociation and developmental deficit in Ciona embryos induced by overexpression of ciBax. Taken together, these findings suggest that functional homologues of both the BH1-3 death effector Bax and the pro-survival Bcl-XL exist in sea squirt Ciona intestinalis, and they control the cell death machinery independent of their heterodimerization.
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Affiliation(s)
- N Takada
- Department of Interdisciplinary Oncology, Drug Discovery Program, H. Lee Moffitt Cancer Center & Research Institute, University of South Florida College of Medicine, 12902 Magnolia Drive, Tampa, FL 33612, USA
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50
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Terakami S, Adachi Y, Iketani H, Sato Y, Sawamura Y, Takada N, Nishitani C, Yamamoto T. Genetic mapping of genes for susceptibility to black spot disease in Japanese pears. Genome 2008; 50:735-41. [PMID: 17893733 DOI: 10.1139/g07-053] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [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: 11/22/2022]
Abstract
Black spot disease, which is caused by the Japanese pear pathotype of Alternaria alternata (Fr.) Keissler, is one of the most harmful diseases in Japanese pear cultivation. We identified the exact positions and linkage groups (LGs) of the genes for susceptibility to black spot in the Japanese pear (Pyrus pyrifolia Nakai) cultivars 'Osa Nijisseiki' (gene Ani) and 'Nansui' (gene Ana). Segregation of susceptibility and resistance fitted the expected ratio of 1:1 in progeny of 'Nansui' but showed a slight distortion in progeny of 'Osa Nijisseiki'. We mapped the genes for susceptibility to black spot in both populations using a genome scanning approach. The simple sequence repeat (SSR) markers CH04h02 and CH03d02 showed tight linkage to Ani and Ana. Although Ani and Ana are derived from different sources, both genes are located at the top region of LG 11. Information about the positions of the susceptibility genes and the molecular markers linked to them will be useful for marker-assisted selection in pear breeding programs.
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Affiliation(s)
- S Terakami
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan.
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