1
|
Sakai M, Tamaki S, Murata I, Parajuli RK, Matsumura A, Kubo N, Tashiro M. Author Correction: Experimental study on Compton camera for boron neutron capture therapy applications. Sci Rep 2024; 14:3154. [PMID: 38326462 PMCID: PMC10850088 DOI: 10.1038/s41598-024-53559-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024] Open
Affiliation(s)
- M Sakai
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - S Tamaki
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - I Murata
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - R K Parajuli
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
- Sydney Imaging Core Research Facility, The University of Sydney, Camperdown, NSW, 2050, Australia
| | - A Matsumura
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - N Kubo
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - M Tashiro
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| |
Collapse
|
2
|
Sakai M, Tamaki S, Murata I, Parajuli RK, Matsumura A, Kubo N, Tashiro M. Experimental study on Compton camera for boron neutron capture therapy applications. Sci Rep 2023; 13:22883. [PMID: 38129553 PMCID: PMC10739814 DOI: 10.1038/s41598-023-49955-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023] Open
Abstract
Boron neutron capture therapy (BNCT) is a high-dose-intensive radiation therapy that has gained popularity due to advancements in accelerator neutron sources. To determine the dose for BNCT, it is necessary to know the difficult-to-determine boron concentration and neutron fluence. To estimate this dose, we propose a method of measuring the prompt γ-rays (PGs) from the boron neutron capture reaction (BNCR) using a Compton camera. We performed a fundamental experiment to verify basic imaging performance and the ability to discern the PGs from 511 keV annihilation γ-rays. A Si/CdTe Compton camera was used to image the BNCR and showed an energy peak of 478 keV PGs, separate from the annihilation γ-ray peak. The Compton camera could visualize the boron target with low neutron intensity and high boron concentration. This study experimentally confirms the ability of Si/CdTe Compton cameras to image BNCRs.
Collapse
Affiliation(s)
- M Sakai
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan.
| | - S Tamaki
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - I Murata
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - R K Parajuli
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
- Sydney Imaging Core Research Facility, The University of Sydney, Camperdown, NSW, 2050, Australia
| | - A Matsumura
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - N Kubo
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - M Tashiro
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| |
Collapse
|
3
|
Tashiro M, Nakao M, Yoshida Y, Yusa K, Ohno T. DOSIMETRY OF EXPERIMENTAL CARBON-ION MINI-BEAMS TOWARD ‘CARBON-KNIFE’ AND ‘CARBON-FLASH’. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01630-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
4
|
Oozawa K, Okawa Y, Hirata S, Tashiro M, Taniguchi K. Professional dental care provision systems for persons with disabilities by prefecture in Japan. Community Dent Health 2021; 38:182-186. [PMID: 34223715 DOI: 10.1922/cdh_00004oozawa05] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The number of persons with disabilities has increased and aged. Although it is important to maintain good oral health to extend healthy life expectancy, it is difficult for such people. This study aimed to analyze regional disparities in dental care provision systems for disabled people and to propose measures for the establishment of an appropriate system. BASIC RESEARCH DESIGN To examine regional disparities in dental care provision systems for persons with disabilities, the number of practicing dentists and dental clinics per 100,000 population, dentists certified by the Japanese Society for Disability and Oral Health, and institutions with certified dentists per 100,000 disabled persons for each prefecture were calculated. The Gini coefficient of each was also calculated to visualize and analyze regional disparities. RESULT The Gini coefficients were 0.09 and 0.07 for practicing dentists and dental clinics and 0.32 and 0.28 for the certified dentists and institutions with the certified dentists, respectively. Dental institutions for the disabled abounded in the three metropolitan areas: Tokyo, Aichi, and Osaka, and their density tended to be lower in northern and southern Japan. In prefectures with few such institutions, there was no correlation between the number of institutions and prefectural residents' income, and some prefectures had similar incomes but had many institutions. CONCLUSION The distribution of dental care to the disabled is highly uneven in Japan, therefore, a system needs to be established to address this issue.
Collapse
Affiliation(s)
- K Oozawa
- Department of Social Dentistry, Tokyo Dental College, Japan
| | - Y Okawa
- Department of Dental Hygiene, Faculty of Health Care Science, Chiba Prefectural University of Health Sciences, Japan
| | - S Hirata
- Department of Social Dentistry, Tokyo Dental College, Japan
| | - M Tashiro
- Department of Social Dentistry, Tokyo Dental College, Japan
| | - K Taniguchi
- Department of Social Dentistry, Tokyo Dental College, Japan
| |
Collapse
|
5
|
Ezura M, Kikuchi A, Ishiki A, Okamura N, Hasegawa T, Harada R, Watanuki S, Funaki Y, Hiraoka K, Baba T, Sugeno N, Oshima R, Yoshida S, Kobayashi J, Kobayashi M, Tano O, Nakashima I, Mugikura S, Iwata R, Taki Y, Furukawa K, Arai H, Furumoto S, Tashiro M, Yanai K, Kudo Y, Takeda A, Aoki M. Longitudinal changes in 18 F-THK5351 positron emission tomography in corticobasal syndrome. Eur J Neurol 2019; 26:1205-1211. [PMID: 30980575 DOI: 10.1111/ene.13966] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 12/05/2018] [Accepted: 04/04/2019] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE Corticobasal syndrome (CBS) is pathologically characterized by tau deposits in neuronal and glial cells and by reactive astrogliosis. In several neurodegenerative disorders, 18 F-THK5351 has been observed to bind to reactive astrocytes expressing monoamine oxidase B. In this study, the aim was to investigate the progression of disease-related pathology in the brains of patients with CBS using positron emission tomography with 18 F-THK5351. METHODS Baseline and 1-year follow-up imaging were acquired using magnetic resonance imaging and positron emission tomography with 18 F-THK5351 in 10 subjects: five patients with CBS and five age-matched normal controls (NCs). RESULTS The 1-year follow-up scan images revealed that 18 F-THK5351 retention had significantly increased in the superior parietal gyrus of the patients with CBS compared with the NCs. The median increases in 18 F-THK5351 accumulation in the patients with CBS were 6.53% in the superior parietal gyrus, 4.34% in the precentral gyrus and 4.33% in the postcentral gyrus. In contrast, there was no significant increase in the regional 18 F-THK5351 retention in the NCs. CONCLUSIONS Longitudinal increases in 18 F-THK5351 binding can be detected over a short interval in the cortical sites of patients with CBS. A monoamine oxidase B binding radiotracer could be useful in monitoring the progression of astrogliosis in CBS.
Collapse
Affiliation(s)
- M Ezura
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - A Kikuchi
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - A Ishiki
- Department of Geriatrics and Gerontology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - N Okamura
- Division of Pharmacology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan.,Department of Pharmacology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - T Hasegawa
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - R Harada
- Department of Pharmacology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S Watanuki
- Division of Cyclotron Nuclear Medicine, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - Y Funaki
- Division of Radiopharmaceutical Chemistry, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - K Hiraoka
- Division of Cyclotron Nuclear Medicine, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - T Baba
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - N Sugeno
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - R Oshima
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S Yoshida
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - J Kobayashi
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - M Kobayashi
- Department of Neurology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - O Tano
- Department of Neurology, Sendai Medical Center, Sendai, Japan
| | - I Nakashima
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan.,Department of Neurology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - S Mugikura
- Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - R Iwata
- Division of Radiopharmaceutical Chemistry, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - Y Taki
- Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - K Furukawa
- Department of Geriatrics and Gerontology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.,Division of Community of Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - H Arai
- Department of Geriatrics and Gerontology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - S Furumoto
- Division of Radiopharmaceutical Chemistry, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - M Tashiro
- Division of Cyclotron Nuclear Medicine, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | - K Yanai
- Department of Pharmacology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Y Kudo
- Division of Neuroimaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - A Takeda
- Department of Neurology, National Hospital Organization, Sendai Nishitaga Hospital, Sendai, Japan
| | - M Aoki
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| |
Collapse
|
6
|
Hirata Y, Sanada Y, Urahashi T, Ihara Y, Yamada N, Okada N, Tashiro M, Katano T, Otomo S, Ushijima K, Mizuta K. Relationship Between Graft Liver Function and the Change of Graft Liver and Spleen Volumes After Technical Variant Liver Transplantation. Transplant Proc 2017; 48:1105-9. [PMID: 27320567 DOI: 10.1016/j.transproceed.2015.12.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 12/30/2015] [Indexed: 12/28/2022]
Abstract
BACKGROUND Although there have been a few reports describing the changes of graft liver and spleen volumes after liver transplantation (LT), little is known about the relationship between graft liver function and the changes of these volumes after technical variant liver transplantation (TVLT). We therefore performed a retrospective study to investigate the relationship between graft liver function and these volumes after TVLT. METHODS We retrospectively investigated the cases of 140 TVLT procedures that were performed in our department between July 1987 and October 2012 and in which follow-up was conducted at our department. We calculated the graft liver volume to standard liver volume (GV/SLV) ratio, the spleen volume to standard spleen volume (SV/SSV) ratio, and the spleen volume to graft liver volume (S/L) ratio by CT volumetry. We clarified the relationship between graft liver function (according to the pathological findings) and the graft liver and spleen volumes at 2, 5, and 10 years after TVLT. RESULTS In the normal liver function group, the GV/SLV, SV/SSV, and S/L ratios decreased until 6 months after TVLT and then converged at 10 years after TVLT to 0.95, 1.27, and 0.27, respectively. In the graft liver failure group, the GV/SLV, SV/SSV, and S/L ratios at 10 years after TVLT were 0.67, 5.01, and 1.55, respectively. A significant correlation was observed between the GV/SLV ratio and the presence of mild liver fibrosis at 2 and 5 years after TVLT (P = .03 and P = .04, respectively). CONCLUSIONS Post-transplant CT-volumetry is a noninvasive and effective means of evaluating graft liver status.
Collapse
Affiliation(s)
- Y Hirata
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan.
| | - Y Sanada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - T Urahashi
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - Y Ihara
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - N Yamada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - N Okada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - M Tashiro
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - T Katano
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - S Otomo
- Department of Pharmacy, Jichi Medical University Hospital, Shimotsuke City, Tochigi, Japan
| | - K Ushijima
- Department of Clinical Pharmacology, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - K Mizuta
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| |
Collapse
|
7
|
Upadhyay BP, Ghimire P, Tashiro M, Banjara MR. Molecular Epidemiology and Antigenic Characterization of Seasonal Influenza Viruses Circulating in Nepal. J Nepal Health Res Counc 2017; 15:44-50. [PMID: 28714491 DOI: 10.3126/jnhrc.v15i1.18013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND Influenza is one of the public health burdens in Nepal and its epidemiology is not clearly understood. The objective of this study was to explore the molecular epidemiology and the antigenic characteristics of the circulating influenza viruses in Nepal. METHODS A total of 1495 throat swab specimens were collected from January to December, 2014. Real time PCR assay was used for identification of influenza virus types and subtypes. Ten percent of the positive specimens were randomly selected and inoculated onto Madin-Darby Canine Kidney Epithelial cells (MDCK) for influenza virus isolation. All viruses were characterized by the hemagglutination inhibition (HI) assay. RESULTS Influenza viruses were detected in 421/1495 (28.2%) specimens. Among positive cases, influenza A virus was detected in 301/421 (71.5%); of which 120 (39.9%) were influenza A/H1N1 pdm09 and 181 (60.1%) were influenza A/H3 subtype. Influenza B viruses were detected in 119/421 (28.3%) specimens. Influenza A/H1N1 pdm09, A/H3 and B viruses isolated in Nepal were antigenically similar to the vaccine strain influenza A/California/07/2009(H1N1pdm09), A/Texas/50/2012(H3N2), A/New York/39/2012(H3N2) and B/Massachusetts/2/2012, respectively. CONCLUSIONS Influenza viruses were reported year-round in different geographical regions of Nepal which was similar to other tropical countries. The circulating influenza virus type and subtypes of Nepal were similar to vaccine candidate virus which could be prevented by currently used influenza vaccine.
Collapse
Affiliation(s)
- B P Upadhyay
- National Public Health Laboratory, Department of Health Services, Kathmandu, Nepal
| | - P Ghimire
- Central Department of Microbiology, Tribhuvan University, Kirtipur, Nepal
| | - M Tashiro
- National Institute of Infectious Diseases, Tokyo, Japan
| | - M R Banjara
- Central Department of Microbiology, Tribhuvan University, Kirtipur, Nepal
| |
Collapse
|
8
|
Upadhyay BP, Ghimire P, Tashiro M, Banjara MR. Characterization of Seasonal Influenza Virus Type and Subtypes Isolated from Influenza Like Illness Cases of 2012. Kathmandu Univ Med J (KUMJ) 2017; 15:57-60. [PMID: 29446364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Background Seasonal influenza is one of the increasing public health burdens in Nepal. Objective The objective of this study was to isolate and characterize the influenza virus type and subtypes of Nepal. Method A total of 1536 throat swab specimens were collected from January to December 2012. Total ribonucleic acid was extracted using Qiagen viral nucleic acid extraction kit and polymerase chain reaction assay was performed following the US; CDC Real-time PCR protocol. Ten percent of positive specimens were inoculated onto Madin-Darby Canine Kidney cells. Isolates were characterized by using reference ferret antisera. Result Of the total specimens (n=1536), influenza virus type A was detected in 196 (22%) cases; of which 194 (99%) were influenza A (H1N1) pdm09 and 2 (1 %) were influenza A/H3 subtype. Influenza B was detected in 684 (76.9%) cases. Influenza A (H1N1) pdm09, A/H3 and influenza B virus were antigenically similar to the recommended influenza virus vaccine candidate of the year 2012. Although sporadic cases of influenza were observed throughout the year, peak was observed during July to November. Conclusion Similar to other tropical countries, A (H1N1) pdm09, A/H3 and influenza B viruses were co-circulated in Nepal.
Collapse
Affiliation(s)
- B P Upadhyay
- Department of Microbiology, National Public Health Laboratory, Tribhuvan University, Kathmandu, Nepal
| | - P Ghimire
- Department of Microbiology, National Public Health Laboratory, Tribhuvan University, Kathmandu, Nepal
| | - M Tashiro
- National Institute of Infectious Disease, Tokyo, Japan
| | - M R Banjara
- Department of Microbiology, National Public Health Laboratory, Tribhuvan University, Kathmandu, Nepal
| |
Collapse
|
9
|
Eckart ME, Boyce KR, Brown GV, Chiao MP, Fujimoto R, Haas D, den Herder JW, Ishisaki Y, Kelley RL, Kilbourne CA, Leutenegger MA, McCammon D, Mitsuda K, Porter FS, Sawada M, Sneiderman GA, Szymkowiak AE, Takei Y, Tashiro M, Tsujimoto M, de Vries CP, Watanabe T, Yamada S, Yamasaki NY. Calibration of the microcalorimeter spectrometer on-board the Hitomi (Astro-H) observatory (invited). Rev Sci Instrum 2016; 87:11D503. [PMID: 27910640 DOI: 10.1063/1.4961075] [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] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The Hitomi Soft X-ray Spectrometer (SXS) was a pioneering non-dispersive imaging x-ray spectrometer with 5 eV FWHM energy resolution, consisting of an array of 36 silicon-thermistor microcalorimeters at the focus of a high-throughput soft x-ray telescope. The instrument enabled astrophysical plasma diagnostics in the 0.3-12 keV band. We introduce the SXS calibration strategy and corresponding ground calibration measurements that took place from 2012-2015, including both the characterization of the microcalorimeter array and measurements of the x-ray transmission of optical blocking filters.
Collapse
Affiliation(s)
- M E Eckart
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - K R Boyce
- NASA Goddard Space Flight Center, Code 592, Greenbelt, Maryland 20771, USA
| | - G V Brown
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M P Chiao
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - R Fujimoto
- Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - D Haas
- SRON Netherlands Institute for Space Research, Utrecht, The Netherlands
| | - J-W den Herder
- SRON Netherlands Institute for Space Research, Utrecht, The Netherlands
| | - Y Ishisaki
- Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - R L Kelley
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - C A Kilbourne
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - M A Leutenegger
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - D McCammon
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - K Mitsuda
- Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 252-5210, Japan
| | - F S Porter
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - M Sawada
- Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - G A Sneiderman
- NASA Goddard Space Flight Center, Code 592, Greenbelt, Maryland 20771, USA
| | | | - Y Takei
- Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 252-5210, Japan
| | - M Tashiro
- Saitama University, Sakura-ku, Saitama 338-8570, Japan
| | - M Tsujimoto
- Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 252-5210, Japan
| | - C P de Vries
- SRON Netherlands Institute for Space Research, Utrecht, The Netherlands
| | - T Watanabe
- NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA
| | - S Yamada
- Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - N Y Yamasaki
- Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 252-5210, Japan
| |
Collapse
|
10
|
Ishiki A, Harada R, Okamura N, Tomita N, Rowe CC, Villemagne VL, Yanai K, Kudo Y, Arai H, Furumoto S, Tashiro M, Furukawa K. Tau imaging with [18F]THK-5351 in progressive supranuclear palsy. Eur J Neurol 2016; 24:130-136. [DOI: 10.1111/ene.13164] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 08/29/2016] [Indexed: 12/26/2022]
Affiliation(s)
- A. Ishiki
- Department of Geriatrics and Gerontology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
| | - R. Harada
- Division of Neuro-imaging; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
| | - N. Okamura
- Department of Pharmacology; Tohoku University School of Medicine; Sendai Japan
- Division of Pharmacology; Faculty of Medicine; Tohoku Medical and Pharmaceutical University; Sendai Japan
| | - N. Tomita
- Department of Geriatrics and Gerontology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
| | - C. C. Rowe
- Centre for PET; Austin Health; Heidelberg Victoria Australia
| | - V. L. Villemagne
- Centre for PET; Austin Health; Heidelberg Victoria Australia
- The Florey Institute of Neuroscience and Mental Health; The University of Melbourne; Melbourne Victoria Australia
| | - K. Yanai
- Department of Pharmacology; Tohoku University School of Medicine; Sendai Japan
| | - Y. Kudo
- Division of Neuro-imaging; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
| | - H. Arai
- Department of Geriatrics and Gerontology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
| | - S. Furumoto
- Division of Radiopharmaceutical Chemistry; Cyclotron and Radioisotope Center; Tohoku University; Sendai Japan
| | - M. Tashiro
- Division of Cyclotron Nuclear Medicine; Cyclotron and Radioisotope Center; Tohoku University; Sendai Japan
| | - K. Furukawa
- Department of Geriatrics and Gerontology; Institute of Development, Aging and Cancer; Tohoku University; Sendai Japan
- Division of Community of Medicine; Faculty of Medicine; Tohoku Medical and Pharmaceutical University; Sendai Japan
| |
Collapse
|
11
|
Sato K, Shidahara M, Watabe H, Watanuki S, Ishikawa Y, Arakawa Y, Nai YH, Furumoto S, Tashiro M, Shoji T, Yanai K, Gonda K. Performance evaluation of the small-animal PET scanner ClairvivoPET using NEMA NU 4-2008 Standards. Phys Med Biol 2015; 61:696-711. [PMID: 26716872 DOI: 10.1088/0031-9155/61/2/696] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The aim of this study was to evaluate the performance of ClairvivoPET using NEMA NU4 standards. The ClairvivoPET incorporates a LYSO dual depth-of-interaction detector system with 151 mm axial field of view (FOV). Spatial resolution, sensitivity, counting rate capabilities, and image quality were evaluated using NEMA NU4-2008 standards. Normal mouse imaging was also performed for 10 min after intravenous injection of (18)F(-)-NaF. Data were compared with 19 other preclinical PET scanners. Spatial resolution measured using full width at half maximum on FBP-ramp reconstructed images was 2.16 mm at radial offset 5 mm of the axial centre FOV. The maximum absolute sensitivity for a point source at the FOV centre was 8.72%. Peak noise equivalent counting rate (NECR) was 415 kcps at 14.6 MBq ml(-1). The uniformity with the image-quality phantom was 4.62%. Spillover ratios in the images of air and water filled chambers were 0.19 and 0.06, respectively. Our results were comparable with the 19 other preclinical PET scanners based on NEMA NU4 standards, with excellent sensitivity because of the large FOV. The ClairvivoPET with iterative reconstruction algorithm also provided sufficient visualization of the mouse spine. The high sensitivity and resolution of the ClairvivoPET scanner provided high quality images for preclinical studies.
Collapse
Affiliation(s)
- K Sato
- Department of Medical Physics, Tohoku University Graduate School of Medicine, Sendai, Japan. Department of Radiology, Hachinohe National Hospital, Hachinohe, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Hedin L, Tashiro M, Linusson P, Eland J, Ehara M, Ueda K, Zhaunerchyk V, Karlsson L, Feifel R. Single site double core level ionisation of OCS. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.05.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
13
|
Asao T, Tsuji I, Tashiro M, Iwami K, Ibuki F. Trypsin Hydrolysis of the Tyr(42)-Ser(43) Bond, the Chymotrypsin Reactive-site Peptide Bond, of Faba Bean Bowman-Birk Type Inhibitor. Biosci Biotechnol Biochem 2014; 56:521-2. [PMID: 1368336 DOI: 10.1271/bbb.56.521] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- T Asao
- Department of Food Sciences, Faculty of Home Economics, Mukogawa Women's University, Hyogo, Japan
| | | | | | | | | |
Collapse
|
14
|
Hedin L, Tashiro M, Linusson P, Eland JHD, Ehara M, Ueda K, Zhaunerchyk V, Karlsson L, Pernestål K, Feifel R. N1s and O1s double ionization of the NO and N2O molecules. J Chem Phys 2014; 140:044309. [DOI: 10.1063/1.4853655] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
15
|
Takashita E, Ejima M, Itoh R, Miura M, Ohnishi A, Nishimura H, Odagiri T, Tashiro M. A community cluster of influenza A(H1N1)pdm09 virus exhibiting cross-resistance to oseltamivir and peramivir in Japan, November to December 2013. Euro Surveill 2014; 19. [DOI: 10.2807/1560-7917.es2014.19.1.20666] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Six influenza A(H1N1)pdm09 viruses were detected in Sapporo, Japan, between November and December 2013. All six viruses possessed an H275Y substitution in the neuraminidase protein, which confers cross-resistance to oseltamivir and peramivir. No epidemiological link among the six cases could be identified; none of them had received neuraminidase inhibitors before specimen collection. The haemagglutinin and neuraminidase genes of the six viruses were closely related to one another, suggesting clonal spread of a single resistant virus.
Collapse
Affiliation(s)
- E Takashita
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - M Ejima
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - R Itoh
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - M Miura
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - A Ohnishi
- Sapporo City Institute of Public Health, Hokkaido, Japan
| | - H Nishimura
- Virus Research Center, Sendai Medical Center, Miyagi, Japan
| | - T Odagiri
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - M Tashiro
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| |
Collapse
|
16
|
Tatebe S, Fukumoto Y, Oikawa-Wakayama M, Sugimura K, Satoh K, Miura Y, Aoki T, Nochioka K, Miura M, Yamamoto S, Tashiro M, Kagaya Y, Shimokawa H. Enhanced [18F]fluorodeoxyglucose accumulation in the right ventricular free wall predicts long-term prognosis of patients with pulmonary hypertension: a preliminary observational study. Eur Heart J Cardiovasc Imaging 2014; 15:666-72. [DOI: 10.1093/ehjci/jet276] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
|
17
|
Naito T, Tashiro M, Ishida T, Ohnishi K, Kawakami J. PP202—Cancer Cachexia Raises the Plasma Concentration of Oxymorphone Through the Reduction of CYP3A but not CYP2D6 in Oxycodone-Treated Patients. Clin Ther 2013. [DOI: 10.1016/j.clinthera.2013.07.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
18
|
Nakano M, Penent F, Tashiro M, Grozdanov TP, Žitnik M, Carniato S, Selles P, Andric L, Lablanquie P, Palaudoux J, Shigemasa E, Iwayama H, Hikosaka Y, Soejima K, Suzuki IH, Kouchi N, Ito K. Single photon K(-2) and K(-1)K(-1) double core ionization in C(2)H(2n) (n=1-3), CO, and N(2) as a potential new tool for chemical analysis. Phys Rev Lett 2013; 110:163001. [PMID: 23679597 DOI: 10.1103/physrevlett.110.163001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Indexed: 06/02/2023]
Abstract
We have observed single photon double K-shell photoionization in the C(2)H(2n) (n=1-3) hydrocarbon sequence and in N(2) and CO, using synchrotron radiation and electron coincidence spectroscopy. Our previous observations of the K(-2) process in these molecules are extended by the observations of a single photon double photoionization with one core hole created at each of the two neighboring atoms in the molecule (K(-1)K(-1) process). In the C(2)H(2n) sequence, the spectroscopy of K(-1)K(-1) states is much more sensitive to the bond length than conventional electron spectroscopy for chemical analysis spectroscopy based on single K-shell ionization. The cross section variation for single photon K(-1)K(-1) double core ionization in the C(2)H(2n) sequence and in the isoelectronic C(2)H(2n), N(2) and CO molecules validates a knock-out mechanism in which a primary ionized 1s photoelectron ejects another 1s electron of the neighbor atom. The specific Auger decay from such states is clearly observed in the CO case.
Collapse
Affiliation(s)
- M Nakano
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Kageyama T, Fujisaki S, Takashita E, Xu H, Yamada S, Uchida Y, Neumann G, Saito T, Kawaoka Y, Tashiro M. Genetic analysis of novel avian A(H7N9) influenza viruses isolated from patients in China, February to April 2013. Euro Surveill 2013. [DOI: 10.2807/ese.18.15.20453-en] [Citation(s) in RCA: 216] [Impact Index Per Article: 19.6] [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
Novel influenza viruses of the H7N9 subtype have infected 33 and killed nine people in China as of 10 April 2013. Their haemagglutinin (HA) and neuraminidase genes probably originated from Eurasian avian influenza viruses; the remaining genes are closely related to avian H9N2 influenza viruses. Several characteristic amino acid changes in HA and the PB2 RNA polymerase subunit probably facilitate binding to human-type receptors and efficient replication in mammals, respectively, highlighting the pandemic potential of the novel viruses.
Collapse
Affiliation(s)
- T Kageyama
- These authors contributed equally to this work
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - S Fujisaki
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
- These authors contributed equally to this work
| | - E Takashita
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - H Xu
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - S Yamada
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Y Uchida
- Influenza and Prion Disease Research Center, National Institute of Animal Health, National Agriculture and Food Research Organization, Ibaraki, Japan
| | - G Neumann
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, United States
| | - T Saito
- The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
- Influenza and Prion Disease Research Center, National Institute of Animal Health, National Agriculture and Food Research Organization, Ibaraki, Japan
| | - Y Kawaoka
- Department of Special Pathogens, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Tokyo, Japan
- ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo, Japan
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, United States
| | - M Tashiro
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| |
Collapse
|
20
|
Kageyama T, Fujisaki S, Takashita E, Xu H, Yamada S, Uchida Y, Neumann G, Saito T, Kawaoka Y, Tashiro M. Genetic analysis of novel avian A(H7N9) influenza viruses isolated from patients in China, February to April 2013. Euro Surveill 2013; 18:20453. [PMID: 23594575 PMCID: PMC6296756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
Novel influenza viruses of the H7N9 subtype have infected 33 and killed nine people in China as of 10 April 2013. Their haemagglutinin (HA) and neuraminidase genes probably originated from Eurasian avian influenza viruses; the remaining genes are closely related to avian H9N2 influenza viruses. Several characteristic amino acid changes in HA and the PB2 RNA polymerase subunit probably facilitate binding to human-type receptors and efficient replication in mammals, respectively, highlighting the pandemic potential of the novel viruses.
Collapse
Affiliation(s)
- T Kageyama
- Influenza Virus Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Sakama M, Kanai T, Kase Y, Yusa K, Tashiro M, Torikai K, Shimada H, Yamada S, Ohno T, Nakano T. Design of ridge filters for spread-out Bragg peaks with Monte Carlo simulation in carbon ion therapy. Phys Med Biol 2012; 57:6615-33. [PMID: 23022653 DOI: 10.1088/0031-9155/57/20/6615] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Spread-out Bragg peaks made by ridge filters or wheel range modulators are used in charged particle therapy with passive methods to achieve uniform biological responses in irradiated tumors. Following the biological responses needed to design the ridge filters, which were developed at the National Institute of Radiological Sciences in Japan, new ridge filters were designed using recent developments in heavy-ion reactions and dosimetry. The Monte Carlo code of Geant4 was used to calculate the qualities of carbon ion beams in a water phantom. The results obtained from the simulation were corrected so that they agreed with the measurements of depth dose distributions. The calculations of biological responses to fragments other than carbon ions were assumed to be for helium ions. The measured dose distributions with the designed ridge filters were compared to the calculated distributions. A beam modifying system using this adaptable method was successively applied to carbon ion therapy at Gunma University.
Collapse
Affiliation(s)
- M Sakama
- Department of Electrical and Electronic Engineering, College of Industrial Technology, Nihon University, 1-2-1, Izumicho, Narashino, Chiba 275-8575 Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Morita-Suzuki S, Fujioka Y, Mitsuoka H, Tashiro M, Harada M. Adding diet and exercise counseling to the health promotion plan alleviates anthropometric and metabolic complications in patients with metabolic syndrome. Nutr Metab Insights 2012; 5:49-58. [PMID: 23882148 PMCID: PMC3698469 DOI: 10.4137/nmi.s9683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
We investigated the effects of individual (IC) and group (GC) diet and exercise counseling in men with metabolic syndrome. Participants received exercise instruction and exercise load was monitored. IC participants received individual diet counseling sessions and general consultations at baseline and monthly. GC participants received a group diet counseling session at baseline and general consultations at baseline and monthly. In the IC group, body mass index (BMI) percent body fat, waist circumference, diastolic blood pressure, low-density lipoprotein cholesterol, glycosylated hemoglobin A1c, and liver function levels were reduced significantly after 3 months, whereas in the GC group, waist circumference and levels of liver function were reduced. Exercise load was negatively correlated with change in BMI and waist circumference in the IC group, and positively correlated with changes in high-density lipoprotein cholesterol levels in all subjects and in the GC group. Diet and exercise counseling, especially IC, may benefit patients with metabolic syndrome.
Collapse
Affiliation(s)
- S Morita-Suzuki
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan. ; Department of Internal Medicine, Kakogawa East City Hospital
| | | | | | | | | |
Collapse
|
23
|
Hiraoka K, Okamura N, Funaki Y, Hayashi A, Tashiro M, Hisanaga K, Fujii T, Takeda A, Yanai K, Iwata R, Mori E. Cholinergic Deficit and Response to Donepezil Therapy in Parkinson's Disease with Dementia: [5-11C-Methoxy]donepezil-PET Study (P04.189). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p04.189] [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: 11/15/2022] Open
|
24
|
Eland JHD, Tashiro M, Linusson P, Ehara M, Ueda K, Feifel R. Double core hole creation and subsequent Auger decay in NH3 and CH4 molecules. Phys Rev Lett 2010; 105:213005. [PMID: 21231301 DOI: 10.1103/physrevlett.105.213005] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Indexed: 05/30/2023]
Abstract
Energies of the hollow molecules CH(4)(2+) and NH(3)(2+) with double vacancies in the 1s shells have been measured using an efficient coincidence technique combined with synchrotron radiation. The energies of these states have been determined accurately by high level electronic structure calculations and can be well understood on the basis of a simple theoretical model. Their major decay pathway, successive Auger emissions, leads first to a new form of triply charged ion with a core hole and two valence vacancies; experimental evidence for such a state is presented with its theoretical interpretation. Preedge 2-hole-1-particle (2h-1p) states at energies below the double core-hole states are located in the same experiments and their decay pathways are also identified.
Collapse
Affiliation(s)
- J H D Eland
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | | | | | | | | | | |
Collapse
|
25
|
Muramatsu M, Kitagawa A, Drentje AG, Hojo S, Ueda T, Miyazaki H, Yusa K, Tashiro M, Torikai K, Sakama M, Kanai T, Yamada S. The compact electron cyclotron resonance ion source KeiGM for the carbon ion therapy facility at Gunma University. Rev Sci Instrum 2010; 81:02A327. [PMID: 20192348 DOI: 10.1063/1.3273055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A high-energy carbon-ion radiotherapy facility is under construction at Gunma University Heavy Ion Medical Centre (GHMC). Its design was based on a study of the heavy ion radiotherapy at the National Institute of Radiological Sciences (NIRS) in order to reduce the size and construction cost of the facility. A compact electron cyclotron resonance ion source (ECRIS) for Gunma University, called KeiGM, was installed in 2008. It is almost a copy of the prototype ECRIS Kei2 which was developed by NIRS; meanwhile this prototype produced over 1 e mA of C(4+) using C(2)H(2) gas (660 W and 40 kV). The beam intensity of C(4+) was 600 e microA with CH(4) gas (250 W and 30 kV). The beam intensity satisfies the required value of 300 e microA.
Collapse
Affiliation(s)
- M Muramatsu
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Masud M, Fujimoto T, Watanuki S, Miyake M, Itoh M, Tashiro M. Application of positron emission tomography in physical medicine. Mymensingh Med J 2010; 19:110-115. [PMID: 20046182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Positron emission tomography (PET) is widely used in the fields of clinical and basic medicine. The PET device utilizes coincidence logic to detect annihilation photons emitted from positrons and estimates physiological functions of human organs in vivo. Radiopharmaceutical 18F- fluorodeoxyglucose (FDG), an analogue of glucose, is trapped metabolically in cells after being administered into the body, and can be substantially used for evaluating physiological and biochemical functions in vivo. Here, we attempted to describe the basics of PET as well as to apply the technique together with 18F-FDG as a tracer for evaluating organ glucose metabolism induced by exercise. Three-dimensional (3D) FDG-PET was applied to normal volunteers who performed exercise to evaluate whole-body glucose metabolism. Regions of interest analysis were drawn on visually defined regions (i.e., lower limbs, thigh, liver, intestine, brain, heart, etc.) to determine radioactivity distribution. FDG-PET clearly showed the recruitment of energy resources from abdominal organs to lower limb skeletal muscles to balance energy expenditures. The results suggested that 3D FDG-PET can be applied as an imaging tool to physical medicine.
Collapse
Affiliation(s)
- M Masud
- Division of Cyclotron Nuclear Medicine, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan
| | | | | | | | | | | |
Collapse
|
27
|
|
28
|
Ito A, Abe N, Ueno A, Koseki Y, Mori E, Tashiro M, Fujii T. Amygdala activity associated with unpleasant emotion induced by social appraisal: A PET study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)72137-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
29
|
Koseki Y, Abe N, Ueno A, Ito A, Mori E, Tashiro M, Fujii T. The brain empathic responses modulated by the affective link between self and others: A PET study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71989-5] [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: 11/30/2022] Open
|
30
|
Abe N, Ueno A, Shigemune Y, Suzuki M, Mori E, Tashiro M, Fujii T. Right temporal lobe activity associated with the retrieval of family relationships in person identification: A positron emission tomography study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70152-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
31
|
Ueno A, Abe N, Suzuki M, Shigemune Y, Hirayama K, Mori E, Tashiro M, Itoh M, Fujii T. Reactivation of the medial temporal lobe and visual association areas during the retrieval of visual information: a positron emission tomography study. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70480-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
32
|
|
33
|
Tashiro M, Watanabe H, Tsuge O. STUDIES ON POSITIONAL PROTECTIVE GROUPS III. A NEW PREPARATIVE METHOD FOR CHLOROPHENOLS WITH THE BROMO GROUP AS A PROTECTIVE GROUP. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304947509356814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
34
|
Tsuge O, Tashiro M, Kamata K, Hokama K. THE PREPARATION OF 1,4-DIBROMOMETHYL-1,4-DIPHENYL-AZINEMETHYLENE AND ITS REACTION WITH BENZYLAMINE. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304947109356077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
35
|
|
36
|
Tashiro M. Progress on Pre-pandemic/Pandemic Influenza Vaccine. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.047] [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
|
37
|
Nakamura H, Tashiro M, Asaumi H, Nomiyama Y, Kaku M, Watanabe S, Miyamoto T, Otsuki M. Increased expression of Smad6 deteriorates murine acute experimental pancreatitis in two models. Gut 2008; 57:788-98. [PMID: 18477679 DOI: 10.1136/gut.2007.119370] [Citation(s) in RCA: 2] [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] [Indexed: 12/08/2022]
Abstract
BACKGROUND Smad6 is implicated in the inhibition of bone morphogenetic protein signalling. However, the function of Smad6 in the pancreas remains obscure. METHODS To elucidate the unknown function of Smad6, we developed transgenic mice selectively expressing Smad6 in pancreatic acinar cells using a plasmid construct coding rat elastase 1 enhancer/promoter. RESULTS Smad6 transgenic mice had no specific distinguishing phenotype such as body weight, pancreatic wet weight and concentrations of pancreatic protein. However, Smad6 transgenic mice reacted to hyperstimulation by caerulein injection or a diet containing 0.5% ethionine. Maximal amylase release stimulated by CCK-8 was significantly decreased in Smad6 transgenic mice acini, and trypsin activities in transgenic mice acini were significantly increased after stimulation of CCK-8. There was no difference in effect of CCK-8 stimulation on the subsequent increase in intracellular free Ca2+ concentration ([Ca2+](i)) between wild-type and transgenic mice acini. These findings suggest that reduced pancreatic enzyme secretion was caused by the disorder of its downstream signal transduction pathways in acinar cells. The amino acid sequence at the N-terminus of Smad6 was similar to that of synaptosome-associated protein (SNAP) 25 interacting protein, which plays an important role in regulating exocytosis of pancreatic enzymes in acinar cells. Pancreatic SNAP25 protein levels in transgenic mice were decreased after caerulein-induced pancreatitis. CONCLUSIONS These results suggest that elevated expression of Smad6 inhibits normal function of SNAP25-interacting protein and SNAP25, reduces amylase secretion in acinar cells, and increases the susceptibility of acinar cells to the onset of pancreatitis.
Collapse
Affiliation(s)
- H Nakamura
- Third Department of Internal Medicine, University of Occupational and Environmental Health, Japan, School of Medicine, 1-1 Iseigaoka, Yahatanishi-ku Kitakyushu 807-8555, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
38
|
Kamijuku H, Nagata Y, Jiang X, Ichinohe T, Tashiro T, Mori K, Taniguchi M, Hase K, Ohno H, Shimaoka T, Yonehara S, Odagiri T, Tashiro M, Sata T, Hasegawa H, Seino KI. Mechanism of NKT cell activation by intranasal coadministration of alpha-galactosylceramide, which can induce cross-protection against influenza viruses. Mucosal Immunol 2008; 1:208-18. [PMID: 19079180 DOI: 10.1038/mi.2008.2] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In a nasal vaccine against influenza, the activation of natural killer T (NKT) cells by intranasal coadministration of alpha-galactosylceramide (alpha-GalCer) can potently enhance protective immune responses. The results of this study show that the NKT cell-activated nasal vaccine can induce an effective cross-protection against different strains of influenza virus, including H5 type. To analyze the mechanism of NKT cell activation by this nasal vaccine, we prepared fluorescence-labeled alpha-GalCer by which we detect a direct interaction between NKT cells and alpha-GalCer-stored dendritic cells in nasal mucosa-associated tissues. Accordingly, although very few NKT cells exist at mucosa, the nasal vaccination induced a localized increase in NKT cell population, which is partly dependent on CXCL16/CXCR6. Furthermore, we found that NKT cell activation stimulates mucosal IgA production by a mechanism that is dependent on interleukin (IL)-4 production. These results strengthen the basis of nasal vaccination via NKT cell activation, which can induce immune cross-protection.
Collapse
Affiliation(s)
- H Kamijuku
- Division of Bioregulation Research, Institute of Medical Science, St Marianna University School of Medicine, Miyamae-ku, Kawasaki City, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Kume K, Yamasaki M, Tashiro M, Santo N, Syukuwa K, Maekawa S, Aritome G, Matsuoka H, Murase T, Yoshikawa I, Otsuki M. Endoscopic mucosal resection for early gastric cancer: comparison of two modifications of the cap method. Endoscopy 2008; 40:280-3. [PMID: 18389445 DOI: 10.1055/s-2007-995646] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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: 01/08/2023]
Abstract
BACKGROUND AND STUDY AIM Endoscopic mucosal resection using a cap (EMR-C) is an established method for curative resection of early neoplastic lesions; prelooping of the snare may however be difficult and lead to imprecise resection. We therefore compared two modifications of the conventional technique using outer snare placement with an accessory channel in a prospective, nonrandomized study. PATIENTS AND METHODS Between October 2004 and March 2007, 54 patients (men 37, women 17; mean age 71 years) underwent EMR. One method involved an internally retained snare (IRS) cap, with a fixed prelooped snare inside the cap; the other method used an externally guided snare (EGS) cap with the snare guided over an oblique cap. The main outcome parameters were specimen size, en bloc resection, and complications. RESULTS There was no difference between use of the IRS and EGS cap methods in relation to specimen size (27.6 vs. 27.1 mm), or rates of en bloc resection (88.9 % vs. 83.3 %); only one perforation occurred, and this was in the EGS group. CONCLUSION Both techniques appeared to provide similar efficacy, the inner rim of the IRS cap stabilizes aspiration of the lesion compared with the EGS cap that does not have it.
Collapse
Affiliation(s)
- K Kume
- Department of Gastroenterology and Metabolism, University of Occupational and Environmental Health, School of Medicine, Kitakyusyu, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Honda Y, Shimada T, Tashiro M, Kimura N, Yoshida Y, Isoyama G, Tagawa S. Study of annihilation processes of positrons in polystyrene-related polymers. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2006.03.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
41
|
Asaumi H, Watanabe S, Taguchi M, Tashiro M, Nagashio Y, Nomiyama Y, Nakamura H, Otsuki M. Green tea polyphenol (-)-epigallocatechin-3-gallate inhibits ethanol-induced activation of pancreatic stellate cells. Eur J Clin Invest 2006; 36:113-22. [PMID: 16436093 DOI: 10.1111/j.1365-2362.2006.01599.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Activated pancreatic stellate cells (PSCs) play a central role in the pathogenesis of pancreatic fibrogenesis and inflammation. Ethanol, a major cause of chronic pancreatitis, directly induces PSC activation and oxidative stress. Inhibition of PSC activation or stimulation to PSC might be an effective therapeutic strategy for the prevention of pancreatic fibrosis, and (-)-epigallocatechin-3-gallate (EGCG), a major component of green tea extracts, is a potent antioxidant of polyphenols. Therefore, we examined the mechanisms through which ethanol induces oxidative stress on PSCs and evaluated the effect of EGCG on activation and cell functions of ethanol-stimulated PSCs. MATERIALS AND METHODS The PSCs were isolated from the pancreas of male Wister rats with Nycodenz gradient methods and cells between passages one and four were used. Isolated PSCs were cultured with ethanol (50 mM) in the absence or presence of EGCG (5 microM or 25 microM). RESULTS The EGCG pre-treatment abolished ethanol-induced lipid peroxidation of the cell membrane, loss of total superoxide dismutase (SOD) activity and suppressed ethanol-induced gene expressions of Mn- and Cu/Zn-SOD. EGCG also suppressed ethanol-induced p38 mitogen-activated protein (MAP) kinase phosphorylation, alpha-smooth muscle actin production in PSCs and activated transforming growth factor-beta1 secretion into the medium. Furthermore, EGCG inhibited ethanol-induced type-I procollagen production and collagen secretion. In addition, EGCG inhibited transformation of freshly isolated cells to activated myofibroblast-like phenotype. CONCLUSIONS Our results suggest that green tea and polyphenols could prevent pancreatic fibrosis by inhibiting PSC activation through the antioxidative effect.
Collapse
Affiliation(s)
- H Asaumi
- Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Kitakyushu, Japan
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Gehrels N, Sarazin CL, O'Brien PT, Zhang B, Barbier L, Barthelmy SD, Blustin A, Burrows DN, Cannizzo J, Cummings JR, Goad M, Holland ST, Hurkett CP, Kennea JA, Levan A, Markwardt CB, Mason KO, Meszaros P, Page M, Palmer DM, Rol E, Sakamoto T, Willingale R, Angelini L, Beardmore A, Boyd PT, Breeveld A, Campana S, Chester MM, Chincarini G, Cominsky LR, Cusumano G, de Pasquale M, Fenimore EE, Giommi P, Gronwall C, Grupe D, Hill JE, Hinshaw D, Hjorth J, Hullinger D, Hurley KC, Klose S, Kobayashi S, Kouveliotou C, Krimm HA, Mangano V, Marshall FE, McGowan K, Moretti A, Mushotzky RF, Nakazawa K, Norris JP, Nousek JA, Osborne JP, Page K, Parsons AM, Patel S, Perri M, Poole T, Romano P, Roming PWA, Rosen S, Sato G, Schady P, Smale AP, Sollerman J, Starling R, Still M, Suzuki M, Tagliaferri G, Takahashi T, Tashiro M, Tueller J, Wells AA, White NE, Wijers RAMJ. A short γ-ray burst apparently associated with an elliptical galaxy at redshift z = 0.225. Nature 2005; 437:851-4. [PMID: 16208363 DOI: 10.1038/nature04142] [Citation(s) in RCA: 471] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Accepted: 08/10/2005] [Indexed: 11/08/2022]
Abstract
Gamma-ray bursts (GRBs) come in two classes: long (> 2 s), soft-spectrum bursts and short, hard events. Most progress has been made on understanding the long GRBs, which are typically observed at high redshift (z approximately 1) and found in subluminous star-forming host galaxies. They are likely to be produced in core-collapse explosions of massive stars. In contrast, no short GRB had been accurately (< 10'') and rapidly (minutes) located. Here we report the detection of the X-ray afterglow from--and the localization of--the short burst GRB 050509B. Its position on the sky is near a luminous, non-star-forming elliptical galaxy at a redshift of 0.225, which is the location one would expect if the origin of this GRB is through the merger of neutron-star or black-hole binaries. The X-ray afterglow was weak and faded below the detection limit within a few hours; no optical afterglow was detected to stringent limits, explaining the past difficulty in localizing short GRBs.
Collapse
Affiliation(s)
- N Gehrels
- NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Tashiro M, Yoshikawa I, Matsuhashi T, Yamasaki T, Nishikawa S, Taguchi M, Yamasaki M, Kume K, Otsuki M. Images of interest. Gastrointestinal: inflammatory myoglandular polyp of the colon. J Gastroenterol Hepatol 2005; 20:1123. [PMID: 15955226 DOI: 10.1111/j.1440-1746.2005.04013.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- M Tashiro
- Third Department of Internal Medicine, University of Occupational and Environmental Health, Japan, School of Medicine, Kitakyushu, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Yoshikawa H, Nakamura H, Tashiro M, Yamaguchi T, Taguchi M, Fukumitsu K, Otsuki M. Cholecystokinin-1 receptor protein up-regulation during pancreatic regeneration after acute haemorrhagic pancreatitis in rats. Eur J Clin Invest 2004; 34:498-507. [PMID: 15255787 DOI: 10.1111/j.1365-2362.2004.01363.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Cholecystokinin (CCK) plays an important role in regeneration after acute pancreatitis in rats. The present study was aimed to elucidate the role of CCK-1 receptor (CCK-1R) in acute pancreatitis. We investigated the serial changes in CCK-1R mRNA and protein levels and their immunolocalization after acute haemorrhagic pancreatitis induced in male Wistar rats by retrograde intraductal infusion of 4% sodium taurocholate (100 micro L 100 g(-1) body weight). METHODS Histological changes were evaluated by haematoxylin and eosin staining. Pancreatic CCK-1R mRNA was determined by Northern blot analysis. Pancreatic CCK-1R protein was evaluated by immunoblot analysis and immunohistochemistry with a polyclonal antibody against rat CCK-1R protein. RESULTS Histological findings revealed that newly formed acinar cells were detected at the periphery of tubular complexes on day 14, and normal architecture of lobules was observed focally on day 21. Pancreatic CCK-1R mRNA peaked on day 3 and thereafter gradually decreased. Cholecystokinin-1R protein rapidly increased after induction of pancreatitits, reaching a maximal level on day 3. On day 3, intense immunoreactivity for CCK-1R protein was observed in both the cytoplasm of vacuolized acinar cells and the tubular complexes. In the regenerative process after acute haemorrhagic pancreatitis in rats, the expression of pancreatic CCK-1R mRNA and protein increased, and intense immunoreactivity for CCK-1R protein was observed in tubular complexes in the cytoplasm of regenerated acinar cells. CONCLUSION These results suggest that CCK-1R contributes to pancreatic regeneration after acute haemorrhagic pancreatitis and that tubular complexes are involved in the process of acinar cell regeneration following pancreatic injury.
Collapse
Affiliation(s)
- H Yoshikawa
- Third Department of Internal Medicine, University of Occupational and Environmental Health, Kitayushu, Japan
| | | | | | | | | | | | | |
Collapse
|
45
|
Saito T, Lim W, Tashiro M. Attenuation of a human H9N2 influenza virus in mammalian host by reassortment with an avian influenza virus. Arch Virol 2004; 149:1397-407. [PMID: 15221539 DOI: 10.1007/s00705-003-0257-8] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2003] [Accepted: 10/10/2003] [Indexed: 10/26/2022]
Abstract
In order to develop a surrogate virus strain for production of an inactivated influenza vaccine against a human H9N2 virus, A/Hong Kong/1073/99 (HK1073: H9N2) was co-infected in embryonated chicken eggs with an apathogenic avian influenza virus, A/Duck/Czechoslovakia/56 (Dk/Cz: H4N6), for gene segment reassortment. Multiple-gene reassortants obtained were examined for replication in mammalian hosts in vitro and in vivo by infecting MDCK cells and by intranasal administration to hamsters, respectively. A 2-6 gene reassortant with both surface glycoproteins of HK1073 origin and the rest of Dk/Cz origin, HK/CZ-13, was shown to replicate poorly in the mammalian hosts both in vivo and in vitro comparing with HK1073, although this reassortant replicated as efficiently as each parental strain in embryonated eggs. No sequence difference was observed in the HA1 region between HK1073 and HK/CZ-13, indicating that the reassortant would be equivalent in its immunogenicity to the parental HK1073 strain when it is used as an inactivated vaccine. A virus strain with attenuation in mammalian hosts is preferable for production of an H9 vaccine, since it should reduce the risk of manufacturing-related infections of employees during the vaccine production. HK/CZ-13 can therefore be a surrogate strain for production of an inactivated vaccine as well as diagnostic antigens in case of a possible future pandemic caused by an HK1073-like H9 influenza virus.
Collapse
Affiliation(s)
- T Saito
- Department of Virology III, National Institute of Infectious Diseases, Tokyo, Japan.
| | | | | |
Collapse
|
46
|
|
47
|
Tashiro M, Tseng C, Seki S, Honda Y, Tagawa S. Influence of radiation-induced species on positronium formation in poly(methylmethacrylate) at low temperature. Radiat Phys Chem Oxf Engl 1993 2003. [DOI: 10.1016/s0969-806x(03)00211-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
48
|
Seki S, Terashima Y, Kunimi Y, Kawamori T, Tashiro M, Honda Y, Tagawa S. The effects of free volumes on charge carrier transport in polysilanes probed by positron annihilation. Radiat Phys Chem Oxf Engl 1993 2003. [DOI: 10.1016/s0969-806x(03)00218-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
49
|
McKimm-Breschkin J, Trivedi T, Hampson A, Hay A, Klimov A, Tashiro M, Hayden F, Zambon M. Neuraminidase sequence analysis and susceptibilities of influenza virus clinical isolates to zanamivir and oseltamivir. Antimicrob Agents Chemother 2003; 47:2264-72. [PMID: 12821478 PMCID: PMC161875 DOI: 10.1128/aac.47.7.2264-2272.2003] [Citation(s) in RCA: 237] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The influenza virus neuraminidase (NA) inhibitors zanamivir and oseltamivir were introduced into clinical practice in various parts of the world between 1999 and 2002. In order to monitor the potential development of resistance, the Neuraminidase Inhibitor Susceptibility Network was established to coordinate testing of clinical isolates collected through the World Health Organization influenza surveillance network from different regions of the world (M. Zambon and F. G. Hayden, Antivir. Res. 49:147-156, 2001). The present study establishes the baseline susceptibilities prior to and shortly after the introduction of the NA inhibitors. Over 1000 clinical influenza isolates recovered from 1996 to 1999 were tested. Susceptibilities were determined by enzyme inhibition assays with chemiluminescent or fluorescent substrates with known NA inhibitor-resistant viruses as controls. The 50% inhibitory concentrations (IC(50)s) depended upon the assay method, the drug tested, and the influenza virus subtype. By both assays, the mean zanamivir IC(50)s were 0.76, 1.82, and 2.28 nM for the subtype H1N1 (N1), H3N2 (N2), and B NAs, respectively, and the oseltamivir IC(50)s were 1.2, 0.5, and 8.8 nM for the N1, N2, and B NAs, respectively. The drug susceptibilities of known zanamivir- and oseltamivir-resistant viruses with the NA mutations E119V, R292K, H274Y, and R152K fell well outside the 95% confidence limits of the IC(50)s for all natural isolates. Sequence analysis of the NAs of viruses for which the IC(50)s were above the 95% confidence limits and several control isolates for which the IC(50)s were in the normal range revealed variations in some previously conserved residues, including D151, A203, T225, and E375 (N2 numbering). Known resistance mutations are both influenza virus subtype and drug specific, but there was no evidence of naturally occurring resistance to either drug in any of the isolates.
Collapse
Affiliation(s)
- J McKimm-Breschkin
- Division of Health Sciences and Nutrition, Commonwealth Scientific and Industrial Research Organisation, Parkville, Australia.
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Tashiro M, Itoh M, Kubota K, Kumano H, Masud MM, Moser E, Arai H, Sasaki H. Relationship between trait anxiety, brain activity and natural killer cell activity in cancer patients: a preliminary PET study. Psychooncology 2001; 10:541-6. [PMID: 11747066 DOI: 10.1002/pon.548] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 01/18/2023]
Abstract
The purpose of this study is to examine the relationship between psychological factors, regional brain activity and natural killer cell activity (NKA). Eight patients with malignant diseases were studied by FDG-PET under a resting condition. NKA and degree of anxiety and depression were measured using Taylor's manifest anxiety scale (MAS) and Zung's self-rating depression scale (SDS). Linear correlation of NKA and psychological measures to the regional brain metabolism in cancer patients was examined using statistical parametric mapping (SPM). Positive linear correlation between NKA and regional metabolic rate ratios was identified in the visual association cortex, anterior cingulate gyrus (CG) and sensorimotor area, and negative correlation was identified in the inferolateral prefrontal cortex (ILPFC), prefrontal cortex (PFC), orbitofrontal cortex (OFC) and anterior temporal cortex. Positive linear correlation to the MAS score was identified in the visual association cortex, anterior CG, primary sensorimotor area and the posterior parietal cortex, and negative correlation was detected in the ILPFC, PFC, OFC and anterior temporal cortex. The NKA and MAS scores positively correlated with each other (p<0.001). The result might serve as supporting data for a hypothesis that psycho-immune interaction is also mediated by the cerebral cortex and limbic system.
Collapse
Affiliation(s)
- M Tashiro
- Division of Nuclear Medicine, Cyclotron and Radioisotope Centre, Tohoku University, Sendai, Japan.
| | | | | | | | | | | | | | | |
Collapse
|