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Komiya A, Kawai K, Sujino T, Iijima M, Tsukamoto S, Kato M, Tajima M, Takayanagi Y, Nako Y, Hiraoka K, Uchida N, Ishikawa S, Ichikawa T. O-015 Results of urological consultation in the setting of IVF clinic. Hum Reprod 2022. [DOI: 10.1093/humrep/deac104.015] [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: 11/15/2022] Open
Abstract
Abstract
Study question
In the management of male infertility, we investigated whether urological consultation could improve the live birth rate, and who should visit urologists in the setting of IVF clinic.
Summary answer
Urologic consultation resulted in improvement of semen quality and live birth rate with more IVF use in those with adverse semen parameters.
What is known already
Male factor infertility exists in about a half of infertility couples. This accounts for about 8% in male reproductive age. Therefore, ideally every male partner of infertility couples attempting conception should have a urological evaluation. However, it is not very easy to access urologists who specialized in reproductive medicine in Japan because we have very few of such urologists. One the other hand, a certain number of couples are wasting their time during IVF failure without urological evaluation.
Study design, size, duration
This is a single-institution retrospective study. We enrolled male partners of infertility couples who visited Kameda IVF clinic Makuhari, Chiba, Japan, between May 2016 and December 2020 and followed at least one year. Live birth rate and the frequency of IVF use were investigated according to semen quality and urological consultation status. Chi-square tests and T tests were used to compare the results between groups.
Participants/materials, setting, methods
Among 2225 couples who visited Kameda IVF clinic Makuhari, 803 male partners (Group A, 36.0%) were evaluated by urologists who were specialized in male reproductive medicine. Remaining 1422 patients did not (Group B, 64.0%). Lifestyle evaluation, physical examination, semen analyses, scrotal ultrasonography, blood test including sexual hormones and zinc concentration were performed in Group A. Semen analyses and lifestyle evaluation were performed in Group B. Urological treatments were done according to factors of male infertility.
Main results and the role of chance
Semen quality was worse in Group A as compared to Group B (sperm motility, 28.5±16.9% vs. 46.0±17.0%; total sperm count, 105±108 million/mL vs. 176±155; total motile sperm count, 34±49 vs.87±98; mean±S.D.; p = 0.0001, 0.0001, 0.0001, A vs. B, respectively). After urologic consultation and managements, sperm motility was improved to 34±18% (p = 0.001). Live birth rate in groups A and B were similar (56.0% vs. 57.2%), however couples who obtained a child in Group A used IVF more often than those in Group B (70% vs. 49.9%, p < 0.001). Among those with adverse semen quality (total motile sperm count less than 15.6 million/mL, n = 472), 350 visited urologists (Group 1, 74.2%) and remaining 122 did not (Group 2, 25.8%). Live birth rate in Group 1 was significantly better than in Group 2 (65.3% vs. 54.1%, p = 0.0359). Use of IVF was significantly more frequent in Group 1 than Group 2 (79.3% vs. 63.6%, p = 0.0359) among who obtained a child. In those with better semen quality (motile sperm count >50 million, n = 900), 119 visited urologist (31.1%, Group 3) and 781 did not (Group 4). Live birth rate and the use of IVF were not different between Groups 3 and 4 (51.1% vs.60.9%; 50.4% vs. 62.9%).
Limitations, reasons for caution
This study is a single-institution, retrospective study in the setting of IVF clinic. There may be a selection bias since men first visit gynecologists. These could affect the study results.
Wider implications of the findings
In the setting of IVF clinic, urologic consultation resulted in improved semen quality and better live birth rate with the use of IVF, especially in those who have adverse semen parameters. The results of this study encourage patients to see urologists and physicians to introduce urologist to patients.
Trial registration number
not applicable
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Affiliation(s)
- A Komiya
- Chiba University Hospital, Urology, Chiba-shi , Japan
| | - K Kawai
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - T Sujino
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - M Iijima
- Kanazawa University Hospital, Urology, Kanazawa-shi , Japan
| | - S Tsukamoto
- Touyu Clinic Shinmatsudo, Urology, Matsudo-shi , Japan
| | - M Kato
- Chiba University Hospital, Urology, Chiba-shi , Japan
| | - M Tajima
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - Y Takayanagi
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - Y Nako
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - K Hiraoka
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - N Uchida
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - S Ishikawa
- Kameda IVF Clinic Makuhari, Reproductive Medicine, Chiba-shi , Japan
| | - T Ichikawa
- Chiba University Hospital, Urology, Chiba-shi , Japan
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Uchida N, Hiraoka K, Sujino T, Yamashita H, Ishikawa T, Kawai K. P-199 Effect of the area of oocyte perivitelline space on the fertilization and embryo development following intracytoplasmic sperm injection. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.192] [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: 11/14/2022] Open
Abstract
Abstract
Study question
Does the area of oocyte perivitelline space have an effect on fertilization and embryo development following intracytoplasmic sperm injection?
Summary answer
The area of oocyte perivitelline space has not an effect on the fertilization but the embryo development following intracytoplasmic sperm injection.
What is known already
Oocyte perivitelline space has a lot of variation at intracytoplasmic sperm injection (ICSI). Some researchers reported that the characteristics of perivitelline space (large or small) affect embryo development, pregnancy, and implantation. However, these studies did not accurately calculate the area of perivitelline space. Therefore, little information is available on the effect of the area of oocyte perivitelline space on fertilization and embryo development following ICSI. The purpose of this study was to calculate and classify the area of oocyte perivitelline space and investigate the effect of the area of perivitelline space on fertilization and embryo development following ICSI.
Study design, size, duration
1. We retrospectively investigated 634 mature oocytes that were conducted ICSI between January 2021 and December 2021. The area of each oocyte perivitelline space was defined from between the area of circle calculated from the inner layer of zona pellucida and cytoplasm and divided into 3 groups (-9%, 10-19%, 20%-).
2. We retrospectively calculated the diameter of an inner layer of zona pellucida and cytoplasm and compared it with the 3 groups (-9%, 10-19%, 20%-).
Participants/materials, setting, methods
1. The fertilization, survival, good quality day-3 embryo, blastocyst, good quality blastocyst rates following ICSI were compared with the 3 groups (-9%, 10-19%, 20%-).
2. The average diameter of an inner layer of zona pellucida and cytoplasm of each oocyte for the 3 groups (-9%, 10-19%, 20%-) were compared.
The data were analyzed by Fisher’s exact test, residual analysis, one-way ANOVA test, with Bonferroni correction as appropriate to determine the statistical differences among groups.
Main results and the role of chance
1. The survival rates of perivitelline space -9%, 10-19%, 20%- groups were 100% (109/109), 96% (363/378), 94% (138/147), the fertilization rates were 89% (97/109), 88% (331/378), 86% (127/147), the good quality day-3 embryo rates were 56% (54/97), 70% (232/331), 70% (89/127) respectively. No significant difference was observed between these comparison items. The blastocyst rates of perivitelline space -9%, 10-19%, 20%- groups were 51% (47/92), 69% (222/321), 82% (93/114), the good quality blastocyst rates were 22% (20/92), 40% (129/321), 52% (59/114) respectively. The blastocyst and good quality blastocyst rates of perivitelline space -9% group showed significantly lower results. On the other hand, the blastocyst and good quality blastocyst rates of perivitelline space 20%- group showed significantly higher results.
2. The average diameter of an inner layer of zona pellucida of perivitelline space -9%, 10-19%, 20%- groups were 125 ± 4 µm, 129 ± 5 µm, 136 ± 6 µm, the average diameter of the cytoplasm of perivitelline space were 121 ± 4 µm, 119 ± 4 µm, 118 ± 4 µm respectively. Significant differences were observed in all pairs of groups of the average diameter of an inner layer of zona pellucida and cytoplasm.
Limitations, reasons for caution
The area of oocyte perivitelline space was calculated at only one plane.
Wider implications of the findings
Oocytes with narrow perivitelline space might have a wide region of adhesive between the cytoplasm surface and an inner layer of the zona pellucida which resulted in a smaller diameter of the zona pellucida and lower blastocyst rate by forming cytoplasmic fragments (Yumoto K et al. JARG. 2020 ;37(6):1349-1354.).
Trial registration number
Not Applicable
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Affiliation(s)
- N Uchida
- Kameda IVF Clinic Makuhari, ART Laboratory , Chiba, Japan
| | - K Hiraoka
- Kameda IVF Clinic Makuhari, ART Laboratory , Chiba, Japan
| | - T Sujino
- Kameda IVF Clinic Makuhari, ART Laboratory , Chiba, Japan
| | - H Yamashita
- H.U. Group Research Institute G.K., Research Laboratory , Tokyo, Japan
| | - T Ishikawa
- Tokyo Medical and Dental University, Comprehensive Reproductive Medicine , Tokyo, Japan
| | - K Kawai
- Kameda IVF Clinic Makuhari, ART Laboratory , Chiba, Japan
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Gersel Stokholm M, Iranzo A, Østergaard K, Serradell M, Otto M, Bacher Svendsen K, Garrido A, Vilas D, Fedorova T, Santamaria J, Møller A, Gaig C, Hiraoka K, Brooks D, Okamura N, Borghammer P, Tolosa E, Pavese N. Cholinergic denervation in patients with idiopathic rapid eye movement sleep behaviour disorder. Eur J Neurol 2019; 27:644-652. [DOI: 10.1111/ene.14127] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 11/11/2019] [Indexed: 11/29/2022]
Affiliation(s)
- M. Gersel Stokholm
- Department of Nuclear Medicine & PET Centre Aarhus University Hospital Aarhus Denmark
| | - A. Iranzo
- Department of Neurology Hospital Clínic de Barcelona Barcelona
- Centro de Investigación Biomédica en Red sobre Enfermedades eurodegenerativas (CIBERNED) Hospital Clínic IDIBAPS Universitat de Barcelona Catalonia
- Multidisciplinary Sleep Unit Hospital Clinic Barcelona Spain
| | - K. Østergaard
- Department of Neurology Aarhus University Hospital Aarhus
| | - M. Serradell
- Department of Neurology Hospital Clínic de Barcelona Barcelona
- Multidisciplinary Sleep Unit Hospital Clinic Barcelona Spain
| | - M. Otto
- Department of Clinical Neurophysiology Aarhus University Hospital Aarhus Denmark
| | | | - A. Garrido
- Centro de Investigación Biomédica en Red sobre Enfermedades eurodegenerativas (CIBERNED) Hospital Clínic IDIBAPS Universitat de Barcelona Catalonia
- Movement Disorders Unit Neurology Service Hospital Clínic de Barcelona Catalonia Spain
| | - D. Vilas
- Centro de Investigación Biomédica en Red sobre Enfermedades eurodegenerativas (CIBERNED) Hospital Clínic IDIBAPS Universitat de Barcelona Catalonia
- Movement Disorders Unit Neurology Service Hospital Clínic de Barcelona Catalonia Spain
| | - T.D. Fedorova
- Department of Nuclear Medicine & PET Centre Aarhus University Hospital Aarhus Denmark
| | - J. Santamaria
- Department of Neurology Hospital Clínic de Barcelona Barcelona
- Centro de Investigación Biomédica en Red sobre Enfermedades eurodegenerativas (CIBERNED) Hospital Clínic IDIBAPS Universitat de Barcelona Catalonia
- Multidisciplinary Sleep Unit Hospital Clinic Barcelona Spain
| | - A. Møller
- Department of Nuclear Medicine & PET Centre Aarhus University Hospital Aarhus Denmark
| | - C. Gaig
- Department of Neurology Hospital Clínic de Barcelona Barcelona
- Centro de Investigación Biomédica en Red sobre Enfermedades eurodegenerativas (CIBERNED) Hospital Clínic IDIBAPS Universitat de Barcelona Catalonia
- Multidisciplinary Sleep Unit Hospital Clinic Barcelona Spain
| | - K. Hiraoka
- Division of Cyclotron Nuclear Medicine, Cyclotron and Radioisotope Center Tohoku University Sendai Japan
| | - D.J. Brooks
- Department of Nuclear Medicine & PET Centre Aarhus University Hospital Aarhus Denmark
- Division of Neuroscience Newcastle University Newcastle upon Tyne UK
| | - N. Okamura
- Division of Pharmacology Faculty of Medicine Tohoku Medical and Pharmaceutical University Sendai Japan
| | - P. Borghammer
- Department of Nuclear Medicine & PET Centre Aarhus University Hospital Aarhus Denmark
| | - E. Tolosa
- Centro de Investigación Biomédica en Red sobre Enfermedades eurodegenerativas (CIBERNED) Hospital Clínic IDIBAPS Universitat de Barcelona Catalonia
- Movement Disorders Unit Neurology Service Hospital Clínic de Barcelona Catalonia Spain
| | - N. Pavese
- Department of Nuclear Medicine & PET Centre Aarhus University Hospital Aarhus Denmark
- Division of Neuroscience Newcastle University Newcastle upon Tyne UK
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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.
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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
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5
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Hiraoka K, Ishikawa T, Kawai K, Harada T. Piezo-ICSI. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.1128] [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]
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6
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Nakamura M, Sugimoto H, Ogata T, Hiraoka K, Yoda H, Sang M, Sang M, Zhu Y, Yu M, Shimozato O, Ozaki T. Improvement of gemcitabine sensitivity of p53-mutated pancreatic cancer MiaPaCa-2 cells by RUNX2 depletion-mediated augmentation of TAp73-dependent cell death. Oncogenesis 2016; 5:e233. [PMID: 27294865 PMCID: PMC4945741 DOI: 10.1038/oncsis.2016.40] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 12/29/2015] [Revised: 04/21/2016] [Accepted: 05/03/2016] [Indexed: 12/12/2022] Open
Abstract
Pancreatic cancer exhibits the worst prognostic outcome among human cancers. Recently, we have described that depletion of RUNX2 enhances gemcitabine (GEM) sensitivity of p53-deficient pancreatic cancer AsPC-1 cells through the activation of TAp63-mediated cell death pathway. These findings raised a question whether RUNX2 silencing could also improve GEM efficacy on pancreatic cancer cells bearing p53 mutation. In the present study, we have extended our study to p53-mutated pancreatic cancer MiaPaCa-2 cells. Based on our current results, MiaPaCa-2 cells were much more resistant to GEM as compared with p53-proficient pancreatic cancer SW1990 cells, and there existed a clear inverse relationship between the expression levels of TAp73 and RUNX2 in response to GEM. Forced expression of TAp73α in MiaPaCa-2 cells significantly promoted cell cycle arrest and/or cell death, indicating that a large amount of TAp73 might induce cell death even in the presence of mutant p53. Consistent with this notion, overexpression of TAp73α stimulated luciferase activity driven by p53/TAp73-target gene promoters in MiaPaCa-2 cells. Similar to AsPC-1 cells, small interfering RNA-mediated knockdown of RUNX2 remarkably enhanced GEM sensitivity of MiPaCa-2 cells. Under our experimental conditions, TAp73 further accumulated in RUNX2-depleted MiaPaCa-2 cells exposed to GEM relative to GEM-treated non-silencing control cells. As expected, silencing of p73 reduced GEM sensitivity of MiPaCa-2 cells. Moreover, GEM-mediated Tyr phosphorylation level of TAp73 was much more elevated in RUNX2-depleted MiaPaCa-2 cells. Collectively, our present findings strongly suggest that knockdown of RUNX2 contributes to a prominent enhancement of GEM sensitivity of p53-mutated pancreatic cancer cells through the activation of TAp73-mediated cell death pathway, and also provides a promising strategy for the treatment of patients with pancreatic cancer bearing p53 mutation.
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Affiliation(s)
- M Nakamura
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan
| | - H Sugimoto
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan
| | - T Ogata
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan
| | - K Hiraoka
- Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, Chiba, Japan
| | - H Yoda
- Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, Chiba, Japan
| | - M Sang
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan.,Department of Regenerative Medicine, Graduate School of Medicine, University of Toyama, Toyama, Japan
| | - M Sang
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan.,Research Center, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei province, P.R. China
| | - Y Zhu
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan.,Department of Urology, First Hospital of China Medical University, Shenyang, Liaoning Sheng province, P.R. China
| | - M Yu
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan.,Department of Laboratory Animal of China Medical University, Shenyang, Liaoning Sheng province, P.R. China
| | - O Shimozato
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan
| | - T Ozaki
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, Japan
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7
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Chen LC, Ninomiya S, Hiraoka K. Super-atmospheric pressure ionization mass spectrometry and its application to ultrafast online protein digestion analysis. J Mass Spectrom 2016; 51:ii. [PMID: 27270871 DOI: 10.1002/jms.3668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Pressure is a key parameter for an ionization source. In this Special Feature article, Lee Chuin Chen and colleagues review super-atmospheric pressure ionization MS with electrospray, corona-discharge-based chemical ionization, and field desorption. They routinely run their mass spectrometer with ion source pressures ranging from several to several tens of atmospheres. A number of strategies have been used to preserve the high vacuum of the instrument while working with a high-pressure (HP) ion source. A recent prototype uses a booster pump with variable pumping speed added to the first pumping stage of the mass spectrometer to regulate a constant vacuum pressure. Further, a new HP-ESI source allowing rapid (a few seconds) online protein digestion MS is also reported. Dr. Lee Chuin Chen is Associate Professor in the Department of Interdisciplinary Research at the University of Yamanashi (Yamanashi, Japan). His main research interest is the development of novel mass spectrometric methods for in-situ medical diagnosis.
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8
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Usmanov DT, Hiraoka K, Wada H, Morita S, Nonami H. Desorption of low-volatility compounds induced by dynamic friction between microdroplets and an ultrasonically vibrating blade. Analyst 2016; 141:1398-404. [DOI: 10.1039/c5an02215k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Friction plays an important role in desorption and/or ionization of nonvolatile compounds in mass spectrometry, e.g., sonic spray, easy ambient sonic-spray ionization, solvent-assisted inlet ionization, desorption electrospray, etc.
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Affiliation(s)
- D. T. Usmanov
- Clean Energy Research Center
- University of Yamanashi
- Kofu 400-8511
- Japan
- Institute of Ion-Plasma and Laser Technologies
| | - K. Hiraoka
- Clean Energy Research Center
- University of Yamanashi
- Kofu 400-8511
- Japan
| | - H. Wada
- Kyushu Okinawa Agricultural Research Center
- National Agriculture and Food Research Organization
- Chikugo
- Japan
| | - S. Morita
- Kyushu Okinawa Agricultural Research Center
- National Agriculture and Food Research Organization
- Chikugo
- Japan
| | - H. Nonami
- Plant Biophysics/Biochemistry Research Laboratory
- Faculty of Agriculture
- Ehime University
- Matsuyama
- Japan
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9
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Sugimoto H, Nakamura M, Yoda H, Hiraoka K, Shinohara K, Sang M, Fujiwara K, Shimozato O, Nagase H, Ozaki T. Silencing of RUNX2 enhances gemcitabine sensitivity of p53-deficient human pancreatic cancer AsPC-1 cells through the stimulation of TAp63-mediated cell death. Cell Death Dis 2015; 6:e1914. [PMID: 26469963 PMCID: PMC4632284 DOI: 10.1038/cddis.2015.242] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- H Sugimoto
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - M Nakamura
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - H Yoda
- Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - K Hiraoka
- Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - K Shinohara
- Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - M Sang
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - K Fujiwara
- Innovative Therapy Research Group, Nihon University Research Institute of Medical Science, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi, Tokyo 173-8610, Japan
| | - O Shimozato
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - H Nagase
- Laboratory of Cancer Genetics, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
| | - T Ozaki
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuou-ku, Chiba 260-8717, Japan
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Takaishi R, Sakai Y, Hiraoka K, Wada H, Morita S, Nakashima T, Nonami H. Electrospray droplet impact secondary ion mass spectrometry using a vacuum electrospray source. Rapid Commun Mass Spectrom 2015; 29:1420-1426. [PMID: 26147482 DOI: 10.1002/rcm.7240] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 05/29/2015] [Accepted: 05/30/2015] [Indexed: 06/04/2023]
Abstract
RATIONALE In electrospray droplet impact (EDI) developed in our laboratory, an atmospheric pressure electrospray source has been used. To increase the ion beam intensity and reduce the evacuation load, a vacuum electrospray cluster ion source using a silica capillary was developed. METHODS A silica capillary with a tip inner diameter of 8 µm was used for vacuum electrospray using aqueous 10% methanol. To stabilize the flow rate of the liquid for nano-electrospray, a home-made constant pressure liquid pump was also developed. RESULTS By using the silica tip nano-electrospray emitter and a constant pressure pump, stable electrospray with flow rate of 22 nL/min was realized without using any heating system such as laser irradiation. Comparative study of mass spectra obtained by atmospheric pressure EDI (A-EDI) and vacuum EDI (V-EDI) was made for various samples such as thermometer molecule, peptide, polystyrene, Alq(3), NPD, C(60), indium, and SiO(2). V-EDI showed slightly milder ionization than A-EDI. CONCLUSIONS Because V-EDI gave higher target current (5-10 nA) than A-EDI (a few nA at most), V-EDI secondary ion mass spectrometry (SIMS) would be a useful technique for the surface and interface analysis.
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Affiliation(s)
- R Takaishi
- Clean Energy Research Center, University of Yamanashi, Takeda-4, Kofu, 400-8511, Japan
| | - Y Sakai
- Clean Energy Research Center, University of Yamanashi, Takeda-4, Kofu, 400-8511, Japan
| | - K Hiraoka
- Clean Energy Research Center, University of Yamanashi, Takeda-4, Kofu, 400-8511, Japan
| | - H Wada
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization (NARO), 496 Izumi, Fukuoka, 833-0041, Japan
| | - S Morita
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization (NARO), 496 Izumi, Fukuoka, 833-0041, Japan
| | - T Nakashima
- Plant Biophysics/Biochemistry Research Laboratory, Faculty of Agriculture, Ehime University, Matsuyama, 790-8566, Japan
| | - H Nonami
- Plant Biophysics/Biochemistry Research Laboratory, Faculty of Agriculture, Ehime University, Matsuyama, 790-8566, Japan
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Usmanov DT, Chen LC, Yu Z, Yamabe S, Sakaki S, Hiraoka K. Atmospheric pressure chemical ionization of explosives using alternating current corona discharge ion source. J Mass Spectrom 2015; 50:651-661. [PMID: 26149109 DOI: 10.1002/jms.3552] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 10/28/2014] [Accepted: 11/19/2014] [Indexed: 06/04/2023]
Abstract
The high-sensitive detection of explosives is of great importance for social security and safety. In this work, the ion source for atmospheric pressure chemical ionization/mass spectrometry using alternating current corona discharge was newly designed for the analysis of explosives. An electromolded fine capillary with 115 µm inner diameter and 12 mm long was used for the inlet of the mass spectrometer. The flow rate of air through this capillary was 41 ml/min. Stable corona discharge could be maintained with the position of the discharge needle tip as close as 1 mm to the inlet capillary without causing the arc discharge. Explosives dissolved in 0.5 µl methanol were injected to the ion source. The limits of detection for five explosives with 50 pg or lower were achieved. In the ion/molecule reactions of trinitrotoluene (TNT), the discharge products of NOx (-) (x = 2,3), O3 and HNO3 originating from plasma-excited air were suggested to contribute to the formation of [TNT - H](-) (m/z 226), [TNT - NO](-) (m/z 197) and [TNT - NO + HNO3 ](-) (m/z 260), respectively. Formation processes of these ions were traced by density functional theory calculations. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- D T Usmanov
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
- Institute of Ion-Plasma and Laser Technologies, Dormon Yoli Street 33, Akademgorodok, Tashkent, 100125, Uzbekistan
| | - L C Chen
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
| | - Z Yu
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
- School of Chemical and Life Sciences, Shenyang Normal University, Shenyang, 110034, China
| | - S Yamabe
- Fukui Institute of Fundamental Chemistry, Kyoto University, Takano, Sakyoku, Kyoto, 606-8103, Japan
| | - S Sakaki
- Fukui Institute of Fundamental Chemistry, Kyoto University, Takano, Sakyoku, Kyoto, 606-8103, Japan
| | - K Hiraoka
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
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Inagaki A, Hiraoka K, Kamijima S, Robbins J, Jolly D, Gruber H, Kasahara N. ET-23 * THERAPEUTIC EFFICACY OF RETROVIRAL REPLICATING VECTORS IN HUMAN BREAST CANCER CNS METASTASIS MODEL. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou255.23] [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: 11/13/2022] Open
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Takahashi M, Valdes G, Inagaki A, Kamijima S, Hiraoka K, Micewicz E, McBride WH, Iwamoto KS, Hermann K, Collins S, Tam Q, Gruber HE, Robbins JM, Jolly DJ, Kasahara N. ET-60 * ENHANCED THERAPEUTIC EFFICACY OF PRODRUG ACTIVATOR GENE THERAPY WITH A NON-LYTIC RETROVIRAL REPLICATING VECTOR (TOCA 511) COMBINED WITH RADIATION THERAPY IN EXPERIMENTAL GLIOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou255.57] [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: 11/12/2022] Open
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Grimaldi G, Argyropoulos GP, Boehringer A, Celnik P, Edwards MJ, Ferrucci R, Galea JM, Groiss SJ, Hiraoka K, Kassavetis P, Lesage E, Manto M, Miall RC, Priori A, Sadnicka A, Ugawa Y, Ziemann U. Non-invasive cerebellar stimulation--a consensus paper. Cerebellum 2014; 13:121-38. [PMID: 23943521 DOI: 10.1007/s12311-013-0514-7] [Citation(s) in RCA: 195] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The field of neurostimulation of the cerebellum either with transcranial magnetic stimulation (TMS; single pulse or repetitive (rTMS)) or transcranial direct current stimulation (tDCS; anodal or cathodal) is gaining popularity in the scientific community, in particular because these stimulation techniques are non-invasive and provide novel information on cerebellar functions. There is a consensus amongst the panel of experts that both TMS and tDCS can effectively influence cerebellar functions, not only in the motor domain, with effects on visually guided tracking tasks, motor surround inhibition, motor adaptation and learning, but also for the cognitive and affective operations handled by the cerebro-cerebellar circuits. Verbal working memory, semantic associations and predictive language processing are amongst these operations. Both TMS and tDCS modulate the connectivity between the cerebellum and the primary motor cortex, tuning cerebellar excitability. Cerebellar TMS is an effective and valuable method to evaluate the cerebello-thalamo-cortical loop functions and for the study of the pathophysiology of ataxia. In most circumstances, DCS induces a polarity-dependent site-specific modulation of cerebellar activity. Paired associative stimulation of the cerebello-dentato-thalamo-M1 pathway can induce bidirectional long-term spike-timing-dependent plasticity-like changes of corticospinal excitability. However, the panel of experts considers that several important issues still remain unresolved and require further research. In particular, the role of TMS in promoting cerebellar plasticity is not established. Moreover, the exact positioning of electrode stimulation and the duration of the after effects of tDCS remain unclear. Future studies are required to better define how DCS over particular regions of the cerebellum affects individual cerebellar symptoms, given the topographical organization of cerebellar symptoms. The long-term neural consequences of non-invasive cerebellar modulation are also unclear. Although there is an agreement that the clinical applications in cerebellar disorders are likely numerous, it is emphasized that rigorous large-scale clinical trials are missing. Further studies should be encouraged to better clarify the role of using non-invasive neurostimulation techniques over the cerebellum in motor, cognitive and psychiatric rehabilitation strategies.
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Affiliation(s)
- G Grimaldi
- Unité d'Etude du Mouvement, Hôpital Erasme-ULB, 808 Route de Lennik, 1070, Brussels, Belgium,
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Aaberg-Jessen C, Fogh L, Halle B, Jensen V, Brunner N, Kristensen BW, Abe T, Momii Y, Watanabe J, Morisaki I, Natsume A, Wakabayashi T, Fujiki M, Aldaz B, Fabius AWM, Silber J, Harinath G, Chan TA, Huse JT, Anai S, Hide T, Nakamura H, Makino K, Yano S, Kuratsu JI, Balyasnikova IV, Prasol MS, Kanoija DK, Aboody KS, Lesniak MS, Barone T, Burkhart C, Purmal A, Gudkov A, Gurova K, Plunkett R, Barton K, Misuraca K, Cordero F, Dobrikova E, Min H, Gromeier M, Kirsch D, Becher O, Pont LB, Kloezeman J, van den Bent M, Kanaar R, Kremer A, Swagemakers S, French P, Dirven C, Lamfers M, Leenstra S, Pont LB, Balvers R, Kloezeman J, Kleijn A, Lawler S, Leenstra S, Dirven C, Lamfers M, Gong X, Andres A, Hanson J, Delashaw J, Bota D, Chen CC, Yao NW, Chuang WJ, Chang C, Chen PY, Huang CY, Wei KC, Cheng Y, Dai Q, Morshed R, Han Y, Auffinger B, Wainwright D, Zhang L, Tobias A, Rincon E, Thaci B, Ahmed A, He C, Lesniak M, Choi YA, Pandya H, Gibo DM, Fokt I, Priebe W, Debinski W, Chornenkyy Y, Agnihotri S, Buczkowicz P, Rakopoulos P, Morrison A, Barszczyk M, Becher O, Hawkins C, Chung S, Decollogne S, Luk P, Shen H, Ha W, Day B, Stringer B, Hogg P, Dilda P, McDonald K, Moore S, Hayden-Gephart M, Bergen J, Su Y, Rayburn H, Edwards M, Scott M, Cochran J, Das A, Varma AK, Wallace GC, Dixon-Mah YN, Vandergrift WA, Giglio P, Ray SK, Patel SJ, Banik NL, Dasgupta T, Olow A, Yang X, Mueller S, Prados M, James CD, Haas-Kogan D, Dave ND, Desai PB, Gudelsky GA, Chow LML, LaSance K, Qi X, Driscoll J, Driscoll J, Ebsworth K, Walters MJ, Ertl LS, Wang Y, Berahovic RD, McMahon J, Powers JP, Jaen JC, Schall TJ, Eroglu Z, Portnow J, Sacramento A, Garcia E, Raubitschek A, Synold T, Esaki S, Rabkin S, Martuza R, Wakimoto H, Ferluga S, Tome CL, Debinski W, Forde HE, Netland IA, Sleire L, Skeie B, Enger PO, Goplen D, Giladi M, Tichon A, Schneiderman R, Porat Y, Munster M, Dishon M, Weinberg U, Kirson E, Wasserman Y, Palti Y, Giladi M, Porat Y, Schneiderman R, Munster M, Weinberg U, Kirson E, Palti Y, Gramatzki D, Staudinger M, Frei K, Peipp M, Weller M, Grasso C, Liu L, Becher O, Berlow N, Davis L, Fouladi M, Gajjar A, Hawkins C, Huang E, Hulleman E, Hutt M, Keller C, Li XN, Meltzer P, Quezado M, Quist M, Raabe E, Spellman P, Truffaux N, van Vurden D, Wang N, Warren K, Pal R, Grill J, Monje M, Green AL, Ramkissoon S, McCauley D, Jones K, Perry JA, Ramkissoon L, Maire C, Shacham S, Ligon KL, Kung AL, Zielinska-Chomej K, Grozman V, Tu J, Viktorsson K, Lewensohn R, Gupta S, Mladek A, Bakken K, Carlson B, Boakye-Agyeman F, Kizilbash S, Schroeder M, Reid J, Sarkaria J, Hadaczek P, Ozawa T, Soroceanu L, Yoshida Y, Matlaf L, Singer E, Fiallos E, James CD, Cobbs CS, Hashizume R, Tom M, Ihara Y, Ozawa T, Santos R, Torre JDL, Lepe E, Waldman T, Prados M, James D, Hashizume R, Ihara Y, Huang X, Yu-Jen L, Tom M, Mueller S, Gupta N, Solomon D, Waldman T, Zhang Z, James D, Hayashi T, Adachi K, Nagahisa S, Hasegawa M, Hirose Y, Gephart MH, Moore S, Bergen J, Su YS, Rayburn H, Scott M, Cochran J, Hingtgen S, Kasmieh R, Nesterenko I, Figueiredo JL, Dash R, Sarkar D, Fisher P, Shah K, Horne E, Diaz P, Stella N, Huang C, Yang H, Wei K, Huang T, Hlavaty J, Ostertag D, Espinoza FL, Martin B, Petznek H, Rodriguez-Aguirre M, Ibanez C, Kasahara N, Gunzburg W, Gruber H, Pertschuk D, Jolly D, Robbins J, Hurwitz B, Yoo JY, Bolyard C, Yu JG, Wojton J, Zhang J, Bailey Z, Eaves D, Cripe T, Old M, Kaur B, Serwer L, Yoshida Y, Le Moan N, Santos R, Ng S, Butowski N, Krtolica A, Ozawa T, Cary SPL, James CD, Johns T, Greenall S, Donoghue J, Adams T, Karpel-Massler G, Westhoff MA, Kast RE, Dwucet A, Wirtz CR, Debatin KM, Halatsch ME, Karpel-Massler G, Kast RE, Westhoff MA, Merkur N, Dwucet A, Wirtz CR, Debatin KM, Halatsch ME, Kievit F, Stephen Z, Wang K, Kolstoe D, Silber J, Ellenbogen R, Zhang M, Kitange G, Schroeder M, Sarkaria J, Kleijn A, Haefner E, Leenstra S, Dirven C, Lamfers M, Knubel K, Pernu BM, Sufit A, Pierce AM, Nelson SK, Keating AK, Jensen SS, Kristensen BW, Lachowicz J, Demeule M, Regina A, Tripathy S, Curry JC, Nguyen T, Castaigne JP, Le Moan N, Serwer L, Yoshida Y, Ng S, Davis T, Santos R, Davis A, Tanaka K, Keating T, Getz J, Kapp GT, Romero JM, Ozawa T, James CD, Krtolica A, Cary SPL, Lee S, Ramisetti S, Slagle-Webb B, Sharma A, Connor J, Lee WS, Maire C, Kluk M, Aster JC, Ligon K, Sun S, Lee D, Ho ASW, Pu JKS, Zhang ZQ, Lee NP, Day PJR, Leung GKK, Liu Z, Liu X, Madhankumar AB, Miller P, Webb B, Connor JR, Yang QX, Lobo M, Green S, Schabel M, Gillespie Y, Woltjer R, Pike M, Lu YJ, Torre JDL, Waldman T, Prados M, Ozawa T, James D, Luchman HA, Stechishin O, Nguyen S, Cairncross JG, Weiss S, Lun X, Wells JC, Hao X, Zhang J, Grinshtein N, Kaplan D, Luchman A, Weiss S, Cairncross JG, Senger D, Robbins S, Madhankumar A, Slagle-Webb B, Rizk E, Payne R, Park A, Pang M, Harbaugh K, Connor J, Wilisch-Neumann A, Pachow D, Kirches E, Mawrin C, McDonell S, Liang J, Piao Y, Nguyen N, Yung A, Verhaak R, Sulman E, Stephan C, Lang F, de Groot J, Mizobuchi Y, Okazaki T, Kageji T, Kuwayama K, Kitazato KT, Mure H, Hara K, Morigaki R, Matsuzaki K, Nakajima K, Nagahiro S, Kumala S, Heravi M, Devic S, Muanza T, Nelson SK, Knubel KH, Pernu BM, Pierce AM, Keating AK, Neuwelt A, Nguyen T, Wu YJ, Donson A, Vibhakar R, Venkatamaran S, Amani V, Neuwelt E, Rapkin L, Foreman N, Ibrahim F, New P, Cui K, Zhao H, Chow D, Stephen W, Nozue-Okada K, Nagane M, McDonald KL, Ogawa D, Chiocca E, Godlewski J, Ozawa T, Yoshida Y, Santos R, James D, Pang M, Liu X, Madhankumar AB, Slagle-Webb B, Patel A, Miller P, Connor J, Pasupuleti N, Gorin F, Valenzuela A, Leon L, Carraway K, Ramachandran C, Nair S, Quirrin KW, Khatib Z, Escalon E, Melnick S, Phillips A, Boghaert E, Vaidya K, Ansell P, Shalinsky D, Zhang Y, Voorbach M, Mudd S, Holen K, Humerickhouse R, Reilly E, Huang T, Parab S, Diago O, Espinoza FL, Martin B, Ibanez C, Kasahara N, Gruber H, Pertschuk D, Jolly D, Robbins J, Ryken T, Agarwal S, Al-Keilani M, Alqudah M, Sibenaller Z, Assemolt M, Sai K, Li WY, Li WP, Chen ZP, Saito R, Sonoda Y, Kanamori M, Yamashita Y, Kumabe T, Tominaga T, Sarkar G, Curran G, Jenkins R, Scharnweber R, Kato Y, Lin J, Everson R, Soto H, Kruse C, Kasahara N, Liau L, Prins R, Semenkow S, Chu Q, Eberhart C, Sengupta R, Marassa J, Piwnica-Worms D, Rubin J, Serwer L, Kapp GT, Le Moan N, Yoshida Y, Romero JM, Ng S, Davis A, Ozawa T, Krtolica A, James CD, Cary SPL, Shai R, Pismenyuk T, Moshe I, Fisher T, Freedman S, Simon A, Amariglio N, Rechavi G, Toren A, Yalon M, Shen H, Decollogne S, Dilda P, Chung S, Luk P, Hogg P, McDonald K, Shimazu Y, Kurozumi K, Ichikawa T, Fujii K, Onishi M, Ishida J, Oka T, Watanabe M, Nasu Y, Kumon H, Date I, Sirianni RW, McCall RL, Spoor J, van der Kaaij M, Kloezeman J, Geurtjens M, Dirven C, Lamfers M, Leenstra S, Stephen Z, Veiseh O, Kievit F, Fang C, Leung M, Ellenbogen R, Silber J, Zhang M, Strohbehn G, Atsina KK, Patel T, Piepmeier J, Zhou J, Saltzman WM, Takahashi M, Valdes G, Inagaki A, Kamijima S, Hiraoka K, Micewicz E, McBride WH, Iwamoto KS, Gruber HE, Robbins JM, Jolly DJ, Kasahara N, Warren K, McCully C, Bacher J, Thomas T, Murphy R, Steffen-Smith E, McAllister R, Pastakia D, Widemann B, Wei K, Yang H, Huang C, Chen P, Hua M, Liu H, Woolf EC, Abdelwahab MG, Fenton KE, Liu Q, Turner G, Preul MC, Scheck AC, Yoshida Y, Ozawa T, Butowski N, Shen W, Brown D, Pedersen H, James D, Zhang J, Hariono S, Yao TW, Sidhu A, Hashizume R, James CD, Weiss WA, Nicolaides TP, Olusanya T. EXPERIMENTAL THERAPEUTICS AND PHARMACOLOGY. Neuro Oncol 2013; 15:iii37-iii61. [PMCID: PMC3823891 DOI: 10.1093/neuonc/not176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023] Open
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Kanno S, Saito M, Hayashi A, Uchiyama M, Hiraoka K, Nishio Y, Hisanaga K, Mori E. Counting-backward test for executive function in idiopathic normal pressure hydrocephalus. Acta Neurol Scand 2012; 126:279-86. [PMID: 22288385 DOI: 10.1111/j.1600-0404.2012.01644.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2012] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to develop and validate a bedside test for executive function in patients with idiopathic normal pressure hydrocephalus (INPH). MATERIALS AND METHODS Twenty consecutive patients with INPH and 20 patients with Alzheimer's disease (AD) were enrolled in this study. We developed the counting-backward test for evaluating executive function in patients with INPH. Two indices that are considered to be reflective of the attention deficits and response suppression underlying executive dysfunction in INPH were calculated: the first-error score and the reverse-effect index. Performance on both the counting-backward test and standard neuropsychological tests for executive function was assessed in INPH and AD patients. RESULTS The first-error score, reverse-effect index and the scores from the standard neuropsychological tests for executive function were significantly lower for individuals in the INPH group than in the AD group. The two indices for the counting-backward test in the INPH group were strongly correlated with the total scores for Frontal Assessment Battery and Phonemic Verbal Fluency. The first-error score was also significantly correlated with the error rate of the Stroop colour-word test and the score of the go/no-go test. In addition, we found that the first-error score highly distinguished patients with INPH from those with AD using these tests. CONCLUSION The counting-backward test is useful for evaluating executive dysfunction in INPH and for differentiating between INPH and AD patients. In particular, the first-error score may reflect deficits in the response suppression related to executive dysfunction in INPH.
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Affiliation(s)
- S. Kanno
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
| | - M. Saito
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
| | - A. Hayashi
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
| | - M. Uchiyama
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
| | - K. Hiraoka
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
| | - Y. Nishio
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
| | - K. Hisanaga
- Department of Neurology; Miyagi National Hospital; Watari; Miyagi; Japan
| | - E. Mori
- Department of Behavioural Neurology and Cognitive Neuroscience; Tohoku University Graduate School of Medicine; Sendai; Japan
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Hiraoka K, Tamaki T, Nada Y, Kiriake C, Kitamura S. Clinical efficiency of piezo-ICSI with ultra-thin micropipette. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.586] [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: 10/28/2022]
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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
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Demirol A, Guven S, Benkhalifa M, Girgin B, Gurgan T, Hiraoka K, Tamaki T, Matsumura Y, Kiriake C, Yoshie M, Uto H, Yoshida H, Kitamura S, Sozen EO, Vicdan K, Akarsu C, Tuncay G, Buluc B, Colak M, Zafosnik M, Taborin M, Kovacic B, Herceg N, Breznik B, Tanaka M, Suzuki H, Takeuchi T, Yoshida A. SESSION 38: EMBRYOLOGY - LABORATORY PROCEDURES. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.37] [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: 11/13/2022] Open
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Hiraoka K, Mota De Queiroz A, Aparecida Marinho S, Costa Pereira AA, Costa Hanemann JA. Sclerotherapy with monoethanolamine oleate in benign oral vascular lesions. Minerva Stomatol 2012; 61:31-36. [PMID: 22274308] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
AIM The aim of the present study was to carry out a retrospective survey at the Stomatology Clinic of a federal university in Brazil of 411 dental charts for the assessment of vascular tumors. METHODS After the determination of the sample, the following clinical patient information was recorded: gender, age, ethnic background, marital status, profession, place of birth, clinical diagnosis, anatomic site and tumor size. RESULTS Among all patients treated, 4.4% had benign vascular tumors in the oral cavity. The majority of these tumors were asymptomatic, with a purplish, bluish or reddish coloration and of variable size. A clinical examination and vitropressure were essential to the diagnosis. The most affected age group was 60 to 75 years. Vascular tumors most often affected white individuals and the female gender. The most common anatomic site was the tongue, followed by the buccal mucosa. Treatment with sclerotherapy proved effective, with complete regression in 94.5% of the tumors. CONCLUSION The majority of patients demonstrated wholehearted acceptance of the treatment and side effects following the administration of the substance were slight. Sclerotherapy is a simple, low-cost method of safe and easy execution, allowing the elimination of surgical trauma and a lesser risk of hemorrhage.
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Affiliation(s)
- K Hiraoka
- Department of Clinical Dentistry and Surgery School of Dentistry, Federal University of Alfenas (UNIFAL)Alfenas, Minas Gerais, Brazil
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Hickey MJ, Malone CK, Erickson KL, Gerschenson LE, Lin AH, Inagaki A, Hiraoka K, Kasahara N, Mueller B, Kruse CA, Kong S, Tyler B, Zhou J, Carter BS, Brem H, Junghans RP, Sampath P, Lai RK, Recht LD, Reardon DA, Paleologos N, Groves M, Rosenfeld MR, Davis T, Green J, Heimberger A, Sampson J, Hashimoto N, Tsuboi A, Chiba Y, Kijima N, Oka Y, Kinoshita M, Kagawa N, Fujimoto Y, Sugiyama H, Yoshimine T, Birks SM, Burnet M, Pilkington GJ, Yu JS, Wheeler CJ, Rudnick J, Mazer M, Wang HQ, Nuno MA, Richardson JE, Fan X, Ji J, Chu RM, Bender JG, Hawkins EW, Black KL, Phuphanich S, Pollack IF, Jakacki RI, Butterfield LH, Okada H, Hunt MA, Pluhar GE, Andersen BM, Gallardo JL, Seiler CO, SantaCruz KS, Ohlfest JR, Bauer DF, Lamb LS, Harmon DK, Zheng X, Romeo AK, Gillespie GY, Parker JN, Markert JM, Jacobs VL, Landry RP, De Leo JA, Bromberg JE, Doorduijn J, Baars JW, van Imhoff GW, Enting R, van den Bent MJ, Murphy KA, Bedi J, Epstein A, Ohlfest JR, Olin M, Andersen B, Swier L, Ohlfest J, Litterman AJ, Zellmer DM, Ohlfest JR, Chiocca EA, Aguilar LK, Aguilar-Cordova E, Manzanera AG, Harney KR, Portnow J, Badie B, Lesniak M, Bell S, Ray-Chaudhuri A, Kaur B, Hardcastle J, Cavaliere R, McGregor J, Lo S, Chakarvarti A, Grecula J, Newton H, Trask TW, Baskin DS, New PZ, Zeng J, See AP, Phallen J, Belcaid Z, Durham N, Meyer C, Albesiano E, Pradilla G, Ford E, Hammers H, Tyler B, Brem H, Tran PT, Pardoll D, Drake CG, Lim M, Ghazi A, Ashoori A, Hanley P, Salsman V, Schaffer DR, Grada Z, Kew Y, Powell SZ, Grossman R, Scheurer ME, Leen AM, Rooney CM, Bollard CM, Heslop HE, Gottschalk S, Ahmed N, Hu J, Patil C, Nuno M, Wheeler C, Rudnick J, Phuphanich S, Mazer M, Wang HQ, Chu R, Black K, Yu J, Marabelle A, Kohrt H, Brody J, Luong R, Tse V, Levy R, Li YM, Jun H, Shahryar M, Daniel VA, Walter HA, Thaipisuttikul I, Avila E, Mitchell DA, Archer GE, Friedman HS, Herndon JE, Bigner DD, Sampson JH, Johnson LA, Archer GE, Nair SK, Schmittling R, Reap E, Sampson JH, Mitchell DA, Li YM, Shahryar M, Jun H, Daniel VA, Walter HA, Knisely JP, Kluger H, Flanigan J, Sznol M, Yu JB, Chiang VL, Prins RM, Kim W, Soto H, Lisiero DN, Lisiero DN, Liau LM. IMMUNOTHERAPY. Neuro Oncol 2011; 13:iii34-iii40. [PMCID: PMC3199174 DOI: 10.1093/neuonc/nor151] [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: 09/21/2023] Open
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Hirayama H, Yamanaka T, Kinoshita A, Hiraoka K, Hirata A, Aoyagi Y. Fabrication of p-n junction with Mg-doped wide bandgap InAlGaN for application to UV emitters. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-693-i4.10.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractMg-doped quaternary InAlGaN is very attractive for use as p-side layers of 300-nm band ultraviolet (UV) light-emitting diodes (LEDs) or laser diodes (LDs), because high hole conductivity is expected to obtain for wide bandgap (~4 eV) InAlGaN with Mg-doping. We fabricated p-n junction diode consisting of Mg-doped In0.02Al0.28Ga0.70N and Si-doped Al0.25Ga0.75N, and demonstrated intense UV emission under CW current injection at room temperature. The rising voltage in I-V curve was around 3.8 V and the breakdown voltage was as high as 10 V. Single peaked intense emission was observed at 340 nm from around InAlGaN/AlGaN p-n junction area without any deep level emission. Also we found that Ni/Au electrode directly fabricated on Mg-doped InAlGaN is useful. From these results, Mg-doped InAlGaN is considered to be very attractive for use as p-side layer of UV-LEDs or LDs.
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Vassena R, Boue S, Gozalez-Roca E, Aran B, Auer H, Veiga A, Izpisua Belmonte JC, Ermini B, Stoop D, Haentjens P, De Vos M, Polyzos N, Verheyen G, Devroey P, Montag M, Ebner T, Xanthopoulou L, Mantzouratou A, Mania A, Ghevaria H, Ghebo C, Serhal P, Delhanty JDA, Martikainen H, Niinimaki M, Suikkari AM, Hiraoka K, Tamaki T, Matsumura Y, Kiriake C, Uto H, Yoshida H, Kitamura S, Monzo C, Assou S, Haouzi D, Bruno C, Dechaud H, Hamamah S. SELECTED ORAL COMMUNICATION SESSION, SESSION 68: EMBRYOLOGY - THE OOCYTE Wednesday 6 July 2011 14:00 - 15:45. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.68] [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: 11/13/2022] Open
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Hiraoka K, Horino H, Yagura A. P29-18 Cerebellar TMS induces fluctuation of the finger movement while manually tracking a moving target. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61134-0] [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: 10/18/2022]
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Meseguer M, Herrero J, Tejera A, de los Santos MJ, Escrich L, Garrido N, Ramsing N, Graham J, Richter K, Siques J, Vermilyea M, Widra E, Tucker M, Cauffman G, Verheyen G, Haentjens P, Devroey P, Liebaers I, Van de Velde H, Hiraoka K, Hiraoka K, Miyazaki M, Fukunaga E, Horiuchi T, Kusuda T, Okano S, Kinutani M, Kinutani K, Brugnon F, Bouraoui Z, Ouchchane L, Gremeau AS, Peikrishvili R, Pouly JL, Janny L. Session 41: Embryo Development & Implantation. Hum Reprod 2010. [DOI: 10.1093/humrep/de.25.s1.41] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hiraoka K, Kamata N, Iwata A, Minamida F, Abe K. Finger movement improves ankle control for gait initiation in patients with Parkinson's disease. Electromyogr Clin Neurophysiol 2008; 48:343-349. [PMID: 19097474] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The purpose of this study was to investigate the effect of finger movement on ankle control for gait initiation in patients with Parkinson's disease (PD patients). The subjects were 13 PD patients and 6 age-matched healthy adults. The subjects moved fingers before or after gait initiation, or initiated gait without finger movement. Ankle joint movement in the stance leg was recorded to estimate the duration of ankle dorsiflexion (DIF duration), which reflects the degree of disturbance in ankle control for gait initiation in PD patients. In the PD patients with prolonged D/F duration, finger movement that preceded gait initiation shortened the D/F duration, but in the PD patients without prolonged D/F duration and in healthy subjects, the effect was not found. Accordingly, finger movement that precedes gait initiation improves ankle control for gait initiation in PD patients who suffer disturbance in ankle control for gait initiation.
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Affiliation(s)
- K Hiraoka
- School of Comprehensive Rehabilitation, Osaka Prefecure University, Japan.
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Abstract
In this report, we describe the visible-laser desorption/ionization of biomolecules deposited on gold-coated porous silicon and gold nanorod arrays. The porous silicon made by electrochemical etching was coated with gold using argon ion sputtering. The gold nanorod arrays were fabricated by electrodepositing gold onto a porous alumina template, and the subsequent partial removal of the alumina template. A frequency-doubled/tripled Nd : YAG laser was used to irradiate the gold nanostructured substrate, and the desorbed molecular ions were mass-analyzed by a time-of-flight mass spectrometer. The desorption/ionization of biomolecules for both substrates was favored by the use of the 532-nm visible-laser, which is in the range of the localized surface plasmon resonance of the gold nanostructure. The present technique offers a potential analytical method for low-molecular-weight analytes that are rather difficult to handle in the conventional matrix-assisted laser desorption/ionization (MALDI) mass spectrometry.
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Affiliation(s)
- L C Chen
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan
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Saito J, Miyamoto H, Nakamura R, Ishiguro M, Michikami T, Nakamura AM, Demura H, Sasaki S, Hirata N, Honda C, Yamamoto A, Yokota Y, Fuse T, Yoshida F, Tholen DJ, Gaskell RW, Hashimoto T, Kubota T, Higuchi Y, Nakamura T, Smith P, Hiraoka K, Honda T, Kobayashi S, Furuya M, Matsumoto N, Nemoto E, Yukishita A, Kitazato K, Dermawan B, Sogame A, Terazono J, Shinohara C, Akiyama H. Detailed images of asteroid 25143 Itokawa from Hayabusa. Science 2006; 312:1341-4. [PMID: 16741110 DOI: 10.1126/science.1125722] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Rendezvous of the Japanese spacecraft Hayabusa with the near-Earth asteroid 25143 Itokawa took place during the interval September through November 2005. The onboard camera imaged the solid surface of this tiny asteroid (535 meters by 294 meters by 209 meters) with a spatial resolution of 70 centimeters per pixel, revealing diverse surface morphologies. Unlike previously explored asteroids, the surface of Itokawa reveals both rough and smooth terrains. Craters generally show unclear morphologies. Numerous boulders on Itokawa's surface suggest a rubble-pile structure.
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Affiliation(s)
- J Saito
- Hayabusa Project Team, Institute of Space and Astronautical Sciences (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan.
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Oshikiri T, Miyamoto M, Hiraoka K, Shichinohe T, Kawarada Y, Kato K, Suzuoki M, Nakakubo Y, Kondo S, Dosaka-Akita H, Kasahara N, Katoh H. Transcriptional targeting of adenovirus vectors with the squamous cell carcinoma-specific antigen-2 promoter for selective apoptosis induction in lung cancer. Cancer Gene Ther 2006; 13:856-63. [PMID: 16710347 DOI: 10.1038/sj.cgt.7700953] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Squamous cell carcinoma antigens SCCA1 and SCCA2 are highly homologous serine proteinase inhibitors which have been widely utilized as serological markers for squamous cell cancers, but it has recently been demonstrated that only SCCA2 is truly specific for certain forms of lung cancer. Using a construct containing the 5'-flanking region of the SCCA2 gene between -460 and +0 bp and the luciferase reporter gene, SCCA2 promoter activity was detected in SCCA2-producing SCC cell lines (LK-2, LC-1), but not in SCCA2-nonproducing lung adenocarcinoma cell lines (A549, ABC-1, and RERF-LC-MS) or normal cells (WI-38, SAEC, and NHEK-Adult). Infection with a recombinant adenovirus vector, Ad-SCCA2-DsRed, resulted in cell-specific expression of the SCCA2 promoter-driven DsRed marker gene only in LK-2 and LC-1 cells. The same strategy was used for SCCA2-driven expression of a proapoptotic gene, (KLAKLAK)2, which can cause mitochondrial disruption by triggering mitochondrial permeabilization and swelling, resulting in the release of cytochrome c and induction of apoptosis. Infection with Ad-SCCA2-KLAKLAK2 specifically reduced the growth of the two human lung SCC cell lines compared to the SCCA2 nonproducing cell lines both in vitro and in vivo, suggesting that the SCCA2 promoter had a tumor-specific effect. These results suggest that transduction of SCCA2 promoter-controlled suicide genes by adenoviral vectors can confer transcriptionally targeted cytotoxicity in SCCA2-producing lung SCC cells, and represents a novel strategy for gene transfer specifically targeted to SCC in the lung.
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Affiliation(s)
- T Oshikiri
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University Graduate School of Medicine, Kita-Ku, Sapporo, Japan.
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Hiraoka K, Miyamoto M, Cho Y, Suzuoki M, Oshikiri T, Nakakubo Y, Itoh T, Ohbuchi T, Kondo S, Katoh H. Concurrent infiltration by CD8+ T cells and CD4+ T cells is a favourable prognostic factor in non-small-cell lung carcinoma. Br J Cancer 2006; 94:275-80. [PMID: 16421594 PMCID: PMC2361103 DOI: 10.1038/sj.bjc.6602934] [Citation(s) in RCA: 352] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The purpose of this study was to clarify the relationship between the number of tumour-infiltrating T lymphocytes and the clinicopathological features and clinical outcome in patients with non-small-cell lung cancer (NSCLC). Tissue specimens from 109 patients who underwent surgical resection for NSCLC were immunohistochemically analysed for CD4 and CD8 expression. Patients were classified into two groups according to whether their tumours exhibited a ‘high’ or ‘low’ level of CD8+ or CD4+ lymphocyte infiltration. Although the level of infiltration by CD8+ T cells alone had no prognostic significance, the survival rate for patients with both ‘high’ CD8+ and ‘high’ CD4+ T-cell infiltration was significantly higher than that for the other groups (log-rank test, P=0.006). Multivariate analysis indicated that concomitant high CD8+ and high CD4+ T-cell infiltration was an independent favourable prognostic factor (P=0.0092). In conclusion, the presence of high levels of both CD8+ T cells and CD4+ T cells is a significant indicator of a better prognosis for patients with NSCLC, and cooperation between these cell populations may allow a significantly more potent antitumour response than either population alone.
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Affiliation(s)
- K Hiraoka
- Surgical Oncology, Cancer Medicine, Division of Cancer Medicine, Hokkaido University Graduate School of Medicine, Kita-15, Nishi-7, Kita-ku, Sapporo 060-8638, Japan.
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Hiraoka K, Fujita K, Ishida M, Hiizumi K, Nakagawa F, Wada A, Yamabe S, Tsuchida N. Thermochemical stabilities and structures of the cluster ions OCS+, S2+, H+(OCS), and C2H5+ with OCS molecules in the gas phase. J Am Soc Mass Spectrom 2005; 16:1760-71. [PMID: 16185889 DOI: 10.1016/j.jasms.2005.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2004] [Revised: 07/22/2005] [Accepted: 07/22/2005] [Indexed: 05/04/2023]
Abstract
The gas-phase clustering reactions of OCS+, S2+, H+(OCS), and C2H5+ ions with carbonyl sulfide (OCS) molecules were studied using a pulsed electron-beam high-pressure mass spectrometer and applying density functional theory (DFT) calculations. In the cluster ions OCS+(OCS)(n) and H+(OCS)(OCS)(n), a moderately strong, here referred to as "semi-covalent", bond was formed with n = 1. However, the nature of bonding changed from semi-covalent to electrostatic with n = 1 --> 2. The bond energy of S2(+)(OCS) was determined experimentally to be 12.9 +/- 1 kcal/mol, which is significantly smaller than that of the isovalent S2(+)(CS2) complex (30.9 +/- 1.5 kcal/mol). DFT based calculations predicted the presence of several isomeric structures for H+(OCS)(OCS)(n) complexes. The bond energies in the C2H5+(OCS)(n) clusters showed an irregular decrease for n = 1 --> 2 and 7 --> 8. The nonclassical bridge structure for the free C2H5+ isomerized to form a semi-covalent bond with one OCS ligand, [H3CCH2...SCO]+, i.e., reverted to classical structure. However, the nonclassical bridge structure of C2H5+ was preserved in the cluster ions C2H5+(OCS)(n) below 140 K attributable to the lack of thermal energy for the isomerization. DFT calculations revealed that stability orders of the geometric isomers of H+(OCS)(OCS)(n) and C2H5+(OCS)(n) changed with increasing n values.
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Affiliation(s)
- K Hiraoka
- Clean Energy Research Center, University of Yamanashi, Takeda 4-3-11, Kofu 400-8511, Japan.
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Hiraoka K, Fujita K, Ishida M, Ichikawa T, Okada H, Hiizumi K, Wada A, Takao K, Yamabe S, Tsuchida N. Gas-Phase Ion/Molecule Reactions in C5F8. J Phys Chem A 2005; 109:1049-56. [PMID: 16833413 DOI: 10.1021/jp040251k] [Citation(s) in RCA: 9] [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: 11/29/2022]
Abstract
Gas-phase ion-molecule reactions in octafluorocyclopentene (C5F8) were studied with a pulsed electron beam mass spectrometer. When a few Torr of major gas, CH4, Ar, or N2, containing approximately 10 mTorr C5F8 was ionized by 2 keV electrons, C5F8+, C5F7+, C4F6+, C4F5+, and C3F3+ were formed as major fragment ions. The interaction between those ions and C5F8 is found to be a weak electrostatic interaction. The cation...C5F8 bonding energies are around 10 kcal/mol, which were reproduced well by (U)B3LYP/6-311+G(d) calculations. The proton affinity of C5F8 (=148.6 kcal/mol by B3LYP/6-311+G(d)) was found to be smaller than that of C2H4 (=162.8 kcal/mol). In the negative mode of operation, the intense signal of C5F8- was observed during the electron pulse. This indicates that C5F8 has a positive electron affinity (1.27 eV by (U)B3LYP/6-311+G(d)). The C5F8- ion was quickly converted to a complex C10F16-. This complex did not react further with C5F8 down to 170 K. The theoretical calculation revealed that a C5F7-F-...C5F8 interaction mode in (C5F8)2- was converted to a C5F7*...C5F9- one via fluoride-ion transfer. The F- ion was found to form a strong covalent bond with C5F8, but the interaction in F-(C5F8)- - -C5F8 is a weak electrostatic interaction due to the charge dispersal in F-(C5F8). The halide ions except F- interact with C5F8 only weakly. Thermochemical stabilities for the cluster ions I-(CH3I)n (n = 1, 2) were also determined.
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Affiliation(s)
- K Hiraoka
- Clean Energy Research Center, University of Yamanashi, Takeda-4, Kofu 400-8511, Japan
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Cunje A, Hopkinson AC, Yamabe S, Hiraoka K, Nakagawa F, Ishida M, Fujita K, Takao K, Wada A, Hiizumi K. Methyl and Ethyl Cation Affinities of Rare Gas Atoms and N2. J Phys Chem A 2004. [DOI: 10.1021/jp040133x] [Citation(s) in RCA: 13] [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] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - S. Yamabe
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
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Abstract
The purpose of this study was to investigate masseter muscle activity during swallowing in seven healthy humans. In order to observe both the increase and the decrease of masseter muscle activity, the subjects performed voluntary saliva swallowing while low-intensity tonic clenching was maintained. Electromyograms (EMG) were recorded from the right masseter muscle and the suprahyoid muscle complex. For six of seven subjects, the masseter EMG amplitude increased above the pre-swallow baseline level at the initial phase of swallowing. This increase was initiated 0.1 +/- 0.3 s before the suprahyoid EMG onset and was terminated 0.6 +/- 0.4 s after the suprahyoid EMG onset. For six of seven subjects, the masseter EMG amplitude decreased below the pre-swallow baseline level during swallowing. This decrease was initiated 0.6 +/- 0.3 s after the suprahyoid EMG onset and was terminated 1.3 +/- 0.4 s after the suprahyoid EMG onset. These findings indicate that biphasic modulation of masseter motoneuron excitability occurs during swallowing in humans. Further investigations are needed to determine whether these findings are extensively applicable to swallowing as it occurs under natural conditions.
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Affiliation(s)
- K Hiraoka
- Department of Physical Therapy, Osaka Prefecture College of Nursing, Osaka, Japan.
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Hiraoka K, Fujita K, Ishida M, Hiizumi K, Nakagawa F, Ichikawa T, Okada H, Wada A, Yamabe S, Tsuchida N. Thermochemical stabilities and structures of the gas-phase cluster ions of halide ions with OCS. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.01.060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Nakakubo Y, Miyamoto M, Cho Y, Hida Y, Oshikiri T, Suzuoki M, Hiraoka K, Itoh T, Kondo S, Katoh H. Clinical significance of immune cell infiltration within gallbladder cancer. Br J Cancer 2003; 89:1736-42. [PMID: 14583778 PMCID: PMC2394404 DOI: 10.1038/sj.bjc.6601331] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
To investigate the pathophysiological significance of infiltrating antitumour immune cells, we evaluated the quantity of immune cell intratumoral infiltration in 110 surgically resected gallbladder specimens by immunohistochemistry. We examined 45 cases of gallbladder cancer and 65 cases of benign gallbladder diseases for CD4+ T cells, CD8+ T cells, natural killer cells (NKCs), and dendritic cells (DCs). High levels of CD4+ T cell, CD8+ T cell, NKC, and DC infiltration were recognised in 51.1% (23 out of 45), 37.8% (17 out of 45), 33.3% (15 out of 45), and 48.9% (22 out of 45) of cancer specimens, respectively. High numbers of infiltrating CD4+ and CD8+ T cells correlated with decreasing tumour invasion, and high numbers of infiltrating DCs correlated with decreasing lymph-node tumour metastasis. Furthermore, increased infiltration of CD4+ and CD8+ T cells and DCs exhibited a significant correlation with prolonged survival. NKC infiltration, however, did not correlate with any of the clinicopathological factors examined. Additionally, high levels of infiltration were not identified in specimens from benign diseases, consistent with the cancer-specific activity of CD4+ and CD8+ T cells and DCs. In this study, we demonstrate that CD4+ and CD8+ tumour-infiltrating lymphocyte and DCs, but not NKCs, are important factors in the accurate prognosis of survival after surgical removal of gallbladder adenocarcinoma.
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Affiliation(s)
- Y Nakakubo
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - M Miyamoto
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan. E-mail:
| | - Y Cho
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - Y Hida
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - T Oshikiri
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - M Suzuoki
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - K Hiraoka
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - T Itoh
- Department of Pathology, Hokkaido University Hospital, N-14 W-5, Kita-ku, Sapporo 060-8648, Japan
| | - S Kondo
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
| | - H Katoh
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University, Graduate School of Medicine, N-15 W-7, Kita-ku, Sapporo 060-8638, Japan
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Murakami S, Miyamoto M, Hida Y, Cho Y, Fukunaga A, Oshikiri T, Kato K, Kurokawa T, Suzuoki M, Nakakubo Y, Hiraoka K, Itoh T, Shinohara T, Morikawa T, Okushiba O, Kondo S, Katoh H. Caveolin-I overexpression is a favourable prognostic factor for patients with extrahepatic bile duct carcinoma. Br J Cancer 2003; 88:1234-8. [PMID: 12737162] [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: 03/02/2023] Open
Abstract
Extrahepatic bile duct carcinoma (EBDC) is a malignancy well known for its poor prognosis. Some clinicopathological prognostic markers have been proposed, but genetic factors have not been well investigated. We have examined expression patterns of caveolin-1, which has been shown to function as a tumour suppressor in vitro, in EBDC using immunohistochemistry. Normal tissues adjacent to the tumour cells did not show immunoreactivity for caveolin-1. A total of 22 of the 60-carcinoma tissue samples (36.7%) studied were positive for caveolin-1. Caveolin-1 immunostaining negatively correlated with the patient's age and pathological T factor (pT) in a statistically significant manner. Multivariate analysis using Cox's proportional hazards model identified caveolin-1 expression as an independent positive prognostic factor. Thus, our study suggests that caveolin-1 expression may be a useful prognostic marker for EBDC.
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Affiliation(s)
- S Murakami
- Department of Surgical Oncology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Suzuoki M, Miyamoto M, Kato K, Hiraoka K, Oshikiri T, Nakakubo Y, Fukunaga A, Shichinohe T, Shinohara T, Itoh T, Kondo S, Katoh H. Impact of caveolin-1 expression on prognosis of pancreatic ductal adenocarcinoma. Br J Cancer 2002; 87:1140-4. [PMID: 12402154 PMCID: PMC2376201 DOI: 10.1038/sj.bjc.6600619] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2002] [Revised: 08/22/2002] [Accepted: 09/09/2002] [Indexed: 01/03/2023] Open
Abstract
Caveolin-1 is a major component of caveolae and plays a regulatory role in several signalling pathways. Caveolin-1 was recently identified as a metastasis-related gene in prostate cancer. The clinical effects of caveolin-1 expression in pancreatic carcinoma, however, remain unknown. In this study, we have investigated the relationship between caveolin-1 expression and the clinicopathologic variables and clinical outcome in 79 patients with pancreatic adenocarcinoma undergoing surgical resection. Caveolin-1 expression was determined by immunohistochemistry, using a polyclonal anti-caveolin-1 antibody. Patients were divided into two groups based on the extent of caveolin-1 expression: a negative expression group (immunoreactivity in less than 50% of cells) and a positive expression group. Positive caveolin-1 immunostaining was detected in 32 cases (40.5% of total), while non-neoplastic ductal epithelium showed little or no staining. Positive caveolin-1 expression was correlated with tumour diameter (P=0.0079), histopathologic grade (P=0.0272) and poor prognosis (P=0.0008). Upon multivariate analysis with Cox's proportional hazards model, positive caveolin-1 expression was shown to be an independent negative predictor for survival (P=0.0358). These results suggest that caveolin-1 overexpression is associated with tumour progression, thereby indicating a poor prognosis for certain patients undergoing surgical resection for pancreatic carcinoma.
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Affiliation(s)
- M Suzuoki
- Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University Graduate School of Medicine, Kita-15, Nishi-7, Kita-ku, Sapporo, Hokkaido 060-8638 Japan.
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Hiraoka K, Kuroda Y, Suzuki Y, Fujino Y, Tanioka Y, Matsumoto S, Sakai T, Kandaswamy R, Sutherland DER. Outcomes in clinical pancreas transplantation with the two-layer cold storage method versus simple storage in University of Wisconsin solution. Transplant Proc 2002; 34:2688-9. [PMID: 12431575 DOI: 10.1016/s0041-1345(02)03376-6] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- K Hiraoka
- Department of Gastroenterological Surgery, Kobe University Graduate School of Medical Science, Kobe, Japan
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41
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Hiraoka K, Sato T, Watanabe M, Mori K, Kimura M. Secondary ions produced by 400 eV He+ ion impact on N2 and O2 thin films at 8 K. J Chem Phys 2002. [DOI: 10.1063/1.1458936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Kobayashi S, Ishimaru M, Hiraoka K, Honda C. Myb-related genes of the Kyoho grape ( Vitis labruscana) regulate anthocyanin biosynthesis. Planta 2002; 215:924-33. [PMID: 12355152 DOI: 10.1007/s00425-002-0830-5] [Citation(s) in RCA: 236] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2002] [Accepted: 05/21/2002] [Indexed: 05/18/2023]
Abstract
Partial cDNAs of myb-related regulatory genes were isolated from the tetraploid Kyoho grape ( Vitis labruscana: V. labrusca x V. vinifera) and the expression patterns of the corresponding genes were studied. Since MybA gene expression is closely related to coloring and/or ripening of the berry (expression increases strongly with the commencement of coloring and berry softening, and is detected only in berry skin and flesh), full-length cDNAs for the gene were isolated from a mature-berry cDNA library. Three different species of MybA were identified from the cDNA sequences. Delivery of these cDNAs to somatic embryos of grape led to the induction of reddish-purple spots and UDP-glucose:flavonoid 3- O-glucosyltransferase (UFGT) gene expression in non-colored embryos. The UFGT transcript was not detected in control embryos, while other structural genes for anthocyanin biosynthesis were expressed in both control and pigmented embryos. In addition, introduction of the UFGT gene induced the same reddish-purple spots in embryos. In contrast, treatment with the leucoanthocyanidin dioxygenase (LDOX) gene failed to induce these spots. Our results strongly suggest that MybA genes are involved in the regulation of anthocyanin biosynthesis in the grape via expression of the UFGT gene.
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Affiliation(s)
- S Kobayashi
- Department of Grape and Persimmon Research, National Institute of Fruit Tree Science, Akitsu, Hiroshima 729-2494, Japan.
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43
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Hiraoka K. Neural mechanisms underlying the effect of transcutaneous electrical nerve stimulation in humans. Electromyogr Clin Neurophysiol 2002; 42:359-66. [PMID: 12224473] [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] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The aim of the present study was to observe the effect of transcutaneous electrical nerve stimulation (TENS) and to determine which group of afferent nerve fibers plays a role in this effect. The subjects were 43 healthy humans. The subjects received placebo intervention, TENS to the common peroneal nerve or to the cutaneous branches of the peroneal nerve. All TENS interventions decreased the Hmax/Mmax ratio. All the TENS interventions but the TENS below the motor threshold to the common peroneal nerve increased the H-reflex latency. The effect of TENS on Ia-mediated presynaptic inhibition varied according to the stimulation. Both group Ia and group II cutaneous afferent nerve fibers from the peroneal nerve are considered to mediate the inhibitory effect on the soleus motoneuron pool. Group II cutaneous afferent nerve fibers are considered to play an important role in increasing soleus H-reflex latency.
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Affiliation(s)
- K Hiraoka
- Department of Physical Education and Welfare, Okayama Prefectural University-Junior College, 111 Kuboki, Sojya, Okayama 719-1197, Japan.
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Sato H, Hiraoka K, Taniguchi M, Takeda Y, Arita M, Shimada K, Namatame H, Kimura A, Kojima K, Muro T, Saitoh Y, Sekiyama A, Suga S. Electronic structure of YbXCu(4) (X = In, Cd, Mg) investigated by high-resolution photoemission spectroscopy. J Synchrotron Radiat 2002; 9:229-232. [PMID: 12091731 DOI: 10.1107/s0909049502009226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2002] [Accepted: 05/21/2002] [Indexed: 05/23/2023]
Abstract
The valence-band electronic structure of YbXCu(4) (X = In, Cd, Mg) has been investigated by means of temperature-dependent high-energy-resolution photoemission spectroscopy using a He I resonance line (hnu = 21.22 eV) and synchrotron radiation (hnu = 800 eV). Intensities of the structure due to the Yb(2+) 4f(7/2) states in the He I spectra of YbInCu(4) and YbCdCu(4) gradually increase with decreasing temperature from 300 to 10 K, and Yb(2+) 4f(7/2) structures are clearly observed as peaks near the Fermi level (E(F)) at 10 K. The enhancement of the Yb(2+) 4f(7/2) peak from 50 to 10 K is much greater for YbInCu(4) than for YbCdCu(4). On the other hand, the Yb(2+) 4f(7/2) states of YbMgCu(4) are observed as a broad structure near E(F). In the synchrotron radiation photoemission spectra of YbInCu(4) and YbCdCu(4), the structures due to the Yb(2+) and Yb(3+) 4f states are recognized at all temperatures. The intensity ratio Yb(2+)/Yb(3+) gradually increases with decreasing temperature. The energy separations between the Yb(2+) and Yb(3+) 4f structures of YbInCu(4) increase from 50 to 20 K. For YbMgCu(4), on the other hand, almost only the Yb(2+) structures are observed and little temperature dependence has been detected.
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Affiliation(s)
- H Sato
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
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Shibata S, Kirchhof N, Matsumoto S, Sageshima J, Hiraoka K, Ansite J, Wistrom M, Sutherland DE, Hering BJ. High-dose streptozotocin for diabetes induction in adult rhesus monkeys. Transplant Proc 2002; 34:1341-4. [PMID: 12072355 DOI: 10.1016/s0041-1345(02)02796-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- S Shibata
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
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Sharma RB, Sharma DKS, Hiraoka K, Kebarle P. Kinetics and equilibria of chloride transfer reactions. Stabilities of carbocations based on chloride and hydride transfer equilibria measurements. J Am Chem Soc 2002. [DOI: 10.1021/ja00299a001] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hiraoka K, Takimoto H, Morise K. Gas-phase hydration reactions of protonated alcohols. Energetics and bulk hydration of cluster ions. J Am Chem Soc 2002; 108:5683-9. [DOI: 10.1021/ja00279a004] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Hiraoka K, Kebarle P. Condensation reactions involving carbonium ions and Lewis bases in the gas phase. Hydration of the tert-butyl cation. J Am Chem Soc 2002. [DOI: 10.1021/ja00444a008] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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49
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Hiraoka K, Kebarle P. Condensation reactions involving carbonium ions in the gas phase. Synthesis of protonated acids in gaseous methane containing carbon monoxide and water vapor. J Am Chem Soc 2002. [DOI: 10.1021/ja00444a009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Hiraoka K, Takimoto H, Yamabe S. Stabilities and structures in cluster ions of five-membered heterocyclic compounds containing oxygen, nitrogen, and sulfur atoms. J Am Chem Soc 2002. [DOI: 10.1021/ja00258a018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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