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Murakami N, Kabayama M, Yano T, Nakamura C, Fukata Y, Morioka C, Fang W, Nako Y, Omichi Y, Koujiya E, Godai K, Kido M, Tseng W, Wada T, Nakamura T, Hirotani A, Fukuda T, Tamatani M, Okuda Y, Ikushima M, Baba Y, Nagano M, Nakamura Y, Rakugi H, Kamide K. Actual conditions for returning home after hospitalization among older patients receiving home medical care in Japan: OHCARE Study. Geriatr Gerontol Int 2024; 24 Suppl 1:320-326. [PMID: 38267253 DOI: 10.1111/ggi.14802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 12/14/2023] [Accepted: 12/19/2023] [Indexed: 01/26/2024]
Abstract
AIM To examine the actual conditions of older patients receiving home medical care after hospitalization over a period of 2 years in Japan. METHODS The study population included 102 participants, aged ≥65 years, receiving home medical care, who consented to participate in the Osaka Home Care Registry (OHCARE) study in Japan over a period of 2 years. We investigated the actual conditions for returning home after hospitalization. RESULTS The median age of the 102 participants was 84 years, and 61 (59.8%) were women. In the group that returned home, 42 (55.3%) of the respondents desired to recuperate in a familiar place, as in advanced care planning (ACP). During the 2-year follow-up period, the group that did not return home had significantly more deaths. A multivariate analysis showed the association in the presence of ACP (odds ratio: 4.72, 95% confidence interval: 1.60-13.86) and cardiac disease (odds ratio: 0.25, 95% confidence interval: 0.08-0.76). The lack of ACP in the medical records when the patient was admitted to the hospital may have prevented the return home. CONCLUSION In older patients who had difficulty returning home after hospitalization, the lack of ACP in home medical care may have been an influencing factor. ACP could help continue with home medical care. Geriatr Gerontol Int 2024; 24: 320-326.
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Affiliation(s)
- Naoko Murakami
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Mai Kabayama
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Tomoko Yano
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Chika Nakamura
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Yuka Fukata
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Chihiro Morioka
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Wen Fang
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Yumiko Nako
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Yuki Omichi
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Eriko Koujiya
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Kayo Godai
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Michiko Kido
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Winston Tseng
- School of Public Health, University of California, Berkeley, California, USA
| | - Taizo Wada
- Osaka Home Medical Care Clinic, Osaka, Japan
| | | | | | | | | | | | | | | | | | | | - Hiromi Rakugi
- Department of Geriatric and General Medicine, Osaka University, Graduate School of Medicine, Osaka, Japan
- Japan Organization of Occupational Health and Safety, Osaka Rosai Hospital, Osaka, Japan
| | - Kei Kamide
- Division of Health Sciences, Osaka University, Graduate School of Medicine, Osaka, Japan
- Department of Geriatric and General Medicine, Osaka University, Graduate School of Medicine, Osaka, Japan
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Yamashina H, Sakai T, Akatsu T, Takatsu Y, Okuda Y. Current Status on Medical Radiation Safety Management in Asia: A Questionnaire Survey. J Med Imaging Radiat Sci 2022. [DOI: 10.1016/j.jmir.2022.10.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Koujiya E, Kabayama M, Yamamoto M, Higami Y, Kodama K, Mukai S, Yano T, Nako Y, Nakamura T, Hirotani A, Fukuda T, Tamatani M, Okuda Y, Ikushima M, Baba Y, Nagano M, Rakugi H, Kamide K. [Seasonal changes in blood pressure and related factors among older patients receiving home medical care]. Nihon Ronen Igakkai Zasshi 2021; 58:602-609. [PMID: 34880179 DOI: 10.3143/geriatrics.58.602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
AIM We investigated seasonal variations in blood pressure (BP) and factors related to these variations among older patients receiving home medical care. METHOD A total 57 patients ≥ 65 years old receiving home medical care who participated in the Osaka Home Care REgistry study (OHCARE), a prospective cohort study, were included. We investigated the seasonal patient characteristics and variations in the BP. In addition, to determine the influence of seasonal variations in the systolic blood pressure (SBP) on the occurrence of clinical events (hospitalization, falls and death), we classified patients into larger- and smaller- change groups based on the median seasonal variations in SBP. RESULT About 60% of subjects were very frail or bedridden. The mean BP was higher in winter than in summer (124.7±11/69.5±7 vs.120.5±12/66.9±8 mmHg) (P< 0.01). On comparing the characteristics of the two groups with larger and smaller changes in the SBP, the group with large BP changes had a significantly lower BP in summer than the group with small BP changes. In addition, the incidence of "hospitalization" was significantly higher in the group with large BP changes than in the group with small BP changes (P = 0.03). CONCLUSION The present study revealed that there were seasonal changes in the BP in older patients receiving home medical care. It was also suggested that seasonal changes in the BP might be associated with the risk of hospitalization events. Given these BP variations, doctors and visiting nurses should be alert for systemic abnormalities, especially in frail patients receinving home medical care.
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Affiliation(s)
- Eriko Koujiya
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Mai Kabayama
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | | | | | - Kana Kodama
- Division of Medicine, Osaka University Graduate School of Medicine
| | - Sakino Mukai
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Tomoko Yano
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Yumiko Nako
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | | | | | | | | | | | | | | | | | - Hiromi Rakugi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine
| | - Kei Kamide
- Division of Health Sciences, Osaka University Graduate School of Medicine.,Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine
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Johnson M, Doi T, Piha-Paul S, Sen S, Shimizu T, Cheng B, Yoshizuka N, Okamoto N, Okuda Y, Qian X, Serbest G, Hammett T, Brady W, Patel M, Bendell J. 513O A phase I/II multicenter, first-in-human study of DS-7300 (B7-H3 DXd-ADC) in patients (pts) with advanced solid tumors. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Niki A, Deguchi Y, Iwasaki S, Mitake T, Okuda Y, Sakaguchi A, Hirota T, Shirahama Y, Nakamichi Y, Inoue K. Gender differences in self-perceived changes among Japanese workers with depression. Occup Med (Lond) 2021; 70:680-684. [PMID: 33247305 DOI: 10.1093/occmed/kqaa202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND The number of patients living with depression continues to increase in Japan. The economic effects of depression include loss of productivity due to both absenteeism and presenteeism. Gender differences have been reported in prevalence, onset pathways and subjective symptoms of depression. AIMS To understand how workers with major depressive disorder (MDD) perceive problems in the workplace and examine gender differences in their self-perceived levels of functioning at work, noticed during the initial stages of depression. METHODS This is a cross-sectional study of Japanese workers with MDD. Participants' self-perceived changes in the level of functioning at work were surveyed after the diagnosis during the first visit. The relationship between gender and changes in the level of functioning at work as initially perceived by the participants themselves was analysed using the chi-square test, supplemented by a residual analysis. RESULTS We administered the survey to 147 workers with MDD. In terms of gender differences in initial self-perceived changes in the level of functioning at work, the proportion of men reporting reduced work efficiency was significantly higher than that of women, while the proportion of women reporting deterioration in relationships with colleagues and superiors was significantly higher than that of men. CONCLUSIONS The findings suggest that greater attention to reduced work efficiency by men and to deterioration in work relationships by women with MDD should be essential components of self-care. Managers need to pay attention to the level of functioning and provide adequate social support for employees.
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Affiliation(s)
- A Niki
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - Y Deguchi
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - S Iwasaki
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - T Mitake
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - Y Okuda
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - A Sakaguchi
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - T Hirota
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - Y Shirahama
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - Y Nakamichi
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
| | - K Inoue
- Department of Neuropsychiatry, Osaka City University, Graduate School of Medicine, Osaka, Japan
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Affiliation(s)
- Y Izumiya
- Department of Respiratory Medicine, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Y Okuda
- Department of Respiratory Medicine, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - S Ueki
- Department of General Internal Medicine and Clinical Laboratory Medicine, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - M Takeda
- Department of Respiratory Medicine, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - K Sato
- Department of Respiratory Medicine, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - K Nakayama
- Department of Respiratory Medicine, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
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Yoshino T, Siena S, Di Bartolomeo M, Raghav K, Masuishi T, Loupakis F, Kawakami H, Yamaguchi K, Nishina T, Fakih M, Elez E, Rodriguez J, Ciardiello F, Saxena K, Yamamoto E, Kobayashi K, Bako E, Okuda Y, Grothey A. 84MO A phase II, multicenter, open-label study of trastuzumab deruxtecan (T-DXd; DS-8201) in patients with HER2-expressing metastatic colorectal cancer (mCRC): DESTINY-CRC01. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.104] [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: 10/22/2022] Open
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Takahashi M, Bang YJ, Karayama M, Watanabe J, Minami H, Yamamoto N, Kinoshita I, Lin C, Im YH, Fujiki T, Achiwa I, Kamiyama E, Okuda Y, Lee C, Takahashi S. 147P Pharmacokinetics, safety, and efficacy of trastuzumab deruxtecan (T-DXd) with OATP1B/CYP3A inhibitors in patients with HER2-expressing advanced solid tumours. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.03.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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9
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Yamamoto M, Kabayama M, Koujiya E, Huang Y, Akiyama M, Higami Y, Kodama K, Nakamura T, Hirotani A, Fukuda T, Tamatani M, Okuda Y, Ikushima M, Baba Y, Nagano M, Rakugi H, Kamide K. Factors associated with changes of care needs level in disabled older adults receiving home medical care: Prospective observational study by Osaka Home Care Registry (OHCARE). Geriatr Gerontol Int 2019; 19:1198-1205. [DOI: 10.1111/ggi.13790] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 08/08/2019] [Accepted: 09/12/2019] [Indexed: 11/27/2022]
Affiliation(s)
- Mariko Yamamoto
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | - Mai Kabayama
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | - Eriko Koujiya
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | - Ya Huang
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | - Masako Akiyama
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | - Yoko Higami
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | - Kana Kodama
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
| | | | | | | | | | | | | | | | | | - Hiromi Rakugi
- Department of Geriatric and General MedicineOsaka University Graduate School of Medicine Osaka Japan
| | - Kei Kamide
- Division of Health SciencesOsaka University Graduate School of Medicine Osaka Japan
- Department of Geriatric and General MedicineOsaka University Graduate School of Medicine Osaka Japan
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Bang YJ, Karayama M, Takahashi M, Watanabe J, Minami H, Yamamoto N, Kinoshita I, Lin CC, Im YH, Fujiki T, Achiwa I, Kamiyama E, Okuda Y, Lee C, Takahashi S. Pharmacokinetics (PK), safety, and efficacy of [fam-] trastuzumab deruxtecan with OATP1B/CYP3A inhibitors in subjects with HER2-expressing advanced solid tumours. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz242.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Takahashi K, Asai T, Okuda Y. Efficacy of a new blood pressure monitor (inflationary non-invasive blood pressure, iNIBP™): a randomised controlled study. Anaesthesia 2019; 75:37-44. [PMID: 31556454 DOI: 10.1111/anae.14850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2019] [Indexed: 11/29/2022]
Abstract
The inflationary non-invasive blood pressure monitor (iNIBP™) uses a new measurement method, whereby the cuff is slowly inflated whilst simultaneously sensing oscillations, to determine the diastolic blood pressure first and then the systolic pressure. It may measure blood pressure more quickly than the conventional non-invasive blood pressure monitor. We studied 66 patients undergoing general anaesthesia, comparing the time taken to measure the blood pressure between the two monitors at times when there were marked changes (increases or decreases by 30 mmHg or greater) in the systolic blood pressure. The median (IQR) [range]) time was significantly longer for the non-invasive blood pressure monitor (38.8 (31.5-44.7) [18.0-130.0] s) than for the iNIBP (14.6 (13.7-16.4) [11.5-35.5] s), p = 0.001, 95%CI for difference 22-25 s). We also studied 30 volunteers to evaluate the accuracy of the iNIBP, comparing it with the mercury sphygmomanometer. There was good agreement between the two monitors, with a mean difference of 0 (95% limit of agreement -12 to 11) mmHg for the systolic blood pressure. We also compared the degree of pain during cuff inflation between the automated non-invasive blood pressure and iNIBP monitors. Pain was significantly more for the non-invasive blood pressure monitor (22 of 30 volunteers had less pain with the iNIBP). We have shown that the iNIBP measured the blood pressure quicker than the conventional non-invasive blood pressure monitor and the speed of measurement was not significantly affected by marked changes in the blood pressure.
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Affiliation(s)
- K Takahashi
- Department of Anaesthesiology, Dokkyo Medical University, Koshigaya City, Japan
| | - T Asai
- Department of Anaesthesiology, Dokkyo Medical University, Koshigaya City, Japan
| | - Y Okuda
- Department of Anaesthesiology, Dokkyo Medical University, Koshigaya City, Japan
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Higami Y, Kabayama M, Kojiya E, Ko G, Yamamoto M, Akiyama M, Kodama K, Nakamura T, Hirotani A, Fukuda T, Tamatani M, Okuda Y, Ikushima M, Baba Y, Nagano M, Rakugi H, Kamide K. [Factors associated with behavioral and psychological symptoms in patients with dementia who received home medical treatment: A cross-sectional study (OHCARE study)]. Nihon Ronen Igakkai Zasshi 2019; 56:468-477. [PMID: 31761853 DOI: 10.3143/geriatrics.56.468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
AIM The present study investigated the behavioral and psychological symptoms of dementia (BPSD) and pharmacological therapy among elderly people with dementia who received home medical treatment. METHODS This study was part of the Osaka Home Care Registry study (OHCARE-study). Participants were >65 years old with dementia. Demographic and medical data, BPSD, and the LTCI [long-term care insurance] care-need level were collected. A multiple logistic regression analysis was performed in order to clarify the factors associated with BPSD. RESULTS Among 110 subjects (82.0±11.3 years old), 64.6% had a diagnosis of dementia, most commonly Alzheimer's dementia. Aside from home medical treatment, 58.1% had a nurse visit, 48.1% received home care, and 40.0% used a day service. The prevalence of BPSD was 53.0%. Those with BPSD most frequently had an LTCI care-need level of 3, and the prevalence of BPSD declined as the level increased after 3. Psychotropic drugs were prescribed in 61.5% of those with BPSD. Antipsychotic drugs were used significantly more frequently in those with nursing care resistance, assault and delusions than in others (all, p <0.005). A multivariate analysis showed that the positive predictor of BPSD was antipsychotic drug use, while negative predictors were an LTCI care-need level and the use of visiting rehabilitation. CONCLUSION The BPSD in elderly dementia patients receiving home medical treatment were clarified. The LTCI care-need level is an independent predictor of BPSD after adjusting for the activities of daily life. Further longitudinal investigations including the BPSD severity and frequency are needed.
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Affiliation(s)
- Yoko Higami
- Osaka Medical College, Faculty of Nursing
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Mai Kabayama
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Eriko Kojiya
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Ga Ko
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Mariko Yamamoto
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Masako Akiyama
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | - Kana Kodama
- Division of Health Sciences, Osaka University Graduate School of Medicine
| | | | | | | | | | | | | | | | | | - Hiromi Rakugi
- Geriatric and General Medicine, Osaka University Graduate School of Medicine
| | - Kei Kamide
- Division of Health Sciences, Osaka University Graduate School of Medicine
- Geriatric and General Medicine, Osaka University Graduate School of Medicine
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Yoshino T, Siena S, Dalal R, Okuda Y, Yamamoto E, Grothey A. A multicenter, multicohort, phase II study of trastuzumab deruxtecan (DS-8201a) in subjects with HER2-expressing metastatic colorectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy431.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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14
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Ito S, Ito H, Rakugi H, Okuda Y, Yoshimura M, Yamakawa S. A DOUBLE BLIND PHASE III STUDY OF ESAXERENONE (CS-3150) COMPARED TO EPLERENONE IN PATIENTS WITH ESSENTIAL HYPERTENSION (ESAX-HTN STUDY). J Hypertens 2018. [DOI: 10.1097/01.hjh.0000539672.65099.dd] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yoshino T, Siena S, Dalal R, Okuda Y, Yamamoto E, Grothey A. A multicenter, multicohort, phase 2 study of trastuzumab deruxtecan (DS-8201a) in subjects with HER2-expressing metastatic colorectal cancer - Trial in progress. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.294] [Citation(s) in RCA: 1] [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: 11/13/2022] Open
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Shimura T, Okuda Y, Yamada T, Hirata Y, Joh T. Colorectal obstruction is a potential prognostic factor for stage II/III colorectal cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx659.028] [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: 11/14/2022] Open
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17
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Hirose N, Okuda Y, Mori S. Across-frequency impairment in seeing a temporal gap. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.0t065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- N. Hirose
- Department of Informatics-Faculty of Information Science and Electrical Engineering; Kyushu University; Fukuoka Japan
| | - Y. Okuda
- Department of Informatics-Graduate School of Information Science and Electrical Engineering; Kyushu University; Fukuoka Japan
| | - S. Mori
- Department of Informatics-Faculty of Information Science and Electrical Engineering; Kyushu University; Fukuoka Japan
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Abstract
Arterial occlusion using radiofrequency energy was performed. The length of the noninsulated part of the guidewire was 10 mm and the duration of radiofrequency supply was 20 s. Animal experiments were carried out in 17 canine arteries; 4 out of 6 arteries less than 2.3 mm in diameter were completely occluded during the 20 s radiofrequency supply. A clinical application was also successfully performed without any complications. Arterial occlusion with radiofrequency can be applied to vessels less than about 2 mm in diameter.
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Affiliation(s)
- N. Tanigawa
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - S. Sawada
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - N. Morioka
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - T. Iwamiya
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - T. Senda
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - M. Kobayashi
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - Y. Okuda
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
| | - Y. Ohta
- From the Department of Radiology, Tottori University Hospital, Tottori, Japan
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Komemushi A, Tanigawa N, Okuda Y, Kojima H, Fujii H, Shomura Y, Sougawa M, Sawada S. A new liquid embolic material for liver tumors: An animal experimental study using Onyx. Acta Radiol 2016; 43:186-91. [PMID: 12010301 DOI: 10.1080/028418502127347736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Purpose: To evaluate the feasibility of a new liquid embolic material, Onyx, for treating liver tumors. Material and Methods: Onyx is a mixture of 6% (w/v) ethylene-vinyl-alcohol copolymer dissolved in anhydrous dimethyl sulfoxide (DMSO) with 28% (w/v) tantalum powder. In addition to 6% Onyx, we also tried 4%, 2% and 1% solutions, prepared by adjusting the amount of DMSO. We used 15 white rabbits with liver tumors created by percutaneous injection of VX2 tumor cells. In 4 groups with 3 rabbits in each, the liver arteries were embolized with 6%, 4%, 2% and 1% Onyx, respectively, and in 3 rabbits DMSO alone was injected. The injections were performed just proximal to the bifurcation of the proper hepatic artery, followed by celiac arteriography. Post mortem, the livers were examined by soft-tissue radiography, and liver-tissue section microscopy. Results: The maximum number of arterial branching points passed by embolic material in either the right or left hepatic arteries was 11, 15 and 16, for 6%, 4% and 2% Onyx, respectively, but was non-measurable for 1% Onyx. Minimum diameters of arteries reached by 6%, 4%, 2% and 1% Onyx in tumorous areas were 40 μm, 35 μm, 20 μm and 10 μm, respectively, and in non-tumorous areas 35 μm, 5 μm, 5 μm and 5 μm, respectively. Conclusion: This study suggests that Onyx may be feasible for treatment of hepatic tumors.
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Affiliation(s)
- A Komemushi
- Department of Radiology, Kansai Medical University, Osaka, Japan
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Takahashi T, Minezaki H, Suzuki A, Obara K, Itaka K, Nomura R, Okuda Y. Control of the wetting properties of ^{4}He crystals in superfluid. Phys Rev E 2016; 93:052806. [PMID: 27300963 DOI: 10.1103/physreve.93.052806] [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] [Received: 03/10/2016] [Indexed: 06/06/2023]
Abstract
To investigate whether it is possible to control the wetting of ^{4}He crystals on a wall in superfluid, the contact angles of ^{4}He crystals were measured on rough and smooth walls at very low temperatures. A rough wall was prepared in a simple manner in which a commercially available coating agent for car mirrors, which makes the glass surface superhydrophobic, was used to coat a glass plate. The contact angles of ^{4}He crystals were increased by approximately 10^{∘} on the rough wall coated with the agent. Therefore, the increase in the repellency of ^{4}He crystals in superfluid was demonstrated to be possible on a very rough surface. The enhancement of the contact angles and a scanning electron microscopy image of the coated surface both suggest that a Cassie-Baxter state of ^{4}He crystals was realized on the surface; the crystals did not have full contact with the wall, but entrapped superfluid was present beneath the crystals in the hollow parts of the rough wall.
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Affiliation(s)
- T Takahashi
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - H Minezaki
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - A Suzuki
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - K Obara
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - K Itaka
- NJRISE, Hirosaki University, 2-1-3 Matsubara, Aomori-shi, Aomori 030-0613, Japan
| | - R Nomura
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Y Okuda
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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Murakawa S, Yamaguchi A, Arai M, Wasai M, Aoki Y, Ishimoto H, Nomura R, Okuda Y, Nagato Y, Higashitani S, Nagai K. Spin-dependent acoustic response in the nonunitary A1 and A2 phases of superfluid 3He under high magnetic fields. Phys Rev Lett 2015; 114:105304. [PMID: 25815943 DOI: 10.1103/physrevlett.114.105304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Indexed: 06/04/2023]
Abstract
The transverse acoustic impedance of superfluid ^{3}He was measured in the A1 and A2 phases up to 13 T to investigate the surface states in nonunitary superfluids. The temperature dependence of the impedance was much larger in the A1 phase than in the A2 phase. This nonsymmetric behavior indicates that momentum exchange with walls for spin-down surface states is quite different from that for spin-up surface states. The spin-dependent response might be a reflection of an essential feature of the nonunitary states where gap amplitudes depend on spin states. Weak-coupling theories ignore any spin-dependent processes and do not account for the nonsymmetric behavior.
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Affiliation(s)
- S Murakawa
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - A Yamaguchi
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - M Arai
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - M Wasai
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - Y Aoki
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - H Ishimoto
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - R Nomura
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - Y Okuda
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - Y Nagato
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Hiroshima 739-8521, Japan
| | - S Higashitani
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Hiroshima 739-8521, Japan
| | - K Nagai
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Hiroshima 739-8521, Japan
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Okuda M, Kashio M, Tanaka N, Matsumoto T, Ishihara S, Nozoe T, Fujii T, Okuda Y, Kawahara T, Miyata K. Nasal high-flow oxygen therapy system for improving sleep-related hypoventilation in chronic obstructive pulmonary disease: a case report. J Med Case Rep 2014; 8:341. [PMID: 25312578 PMCID: PMC4198978 DOI: 10.1186/1752-1947-8-341] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 07/31/2014] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Sleep-related hypoventilation should be considered in patients with chronic obstructive pulmonary disease, because appropriate respiratory management during sleep is important for preventing elevation of PaCO2 levels. A nasal high-flow oxygen therapy system using a special nasal cannula can deliver suitably heated and humidified oxygen at up to 60 L/min. Since the oxygen concentration remains a constant independent of minute ventilation, this system is particularly useful in patients with chronic obstructive pulmonary disease who have hypercapnia. This is the first report of sleep-related hypoventilation with chronic obstructive pulmonary disease improving using a nasal high-flow oxygen therapy system. CASE PRESENTATION We report the case of a 73-year-old Japanese female who started noninvasive positive-pressure ventilation for acute exacerbation of chronic obstructive pulmonary disease and CO2 narcosis due to respiratory infection. Since she became agitated as her level of consciousness improved, she was switched to a nasal high-flow oxygen therapy system. When a repeat polysomnography was performed while using the nasal high-flow oxygen therapy system, the Apnea Hypopnea Index was 3.7 times/h, her mean SpO2 had increased from 89 to 93%, percentage time with SpO2 ≤ 90% had decreased dramatically from 30.8 to 2.5%, and sleep stage 4 was now detected for 38.5 minutes. As these findings indicated marked improvements in sleep-related hypoventilation, nasal high-flow oxygen therapy was continued at home. She has since experienced no recurrences of CO2 narcosis and has been able to continue home treatment. CONCLUSIONS Use of a nasal high-flow oxygen therapy system proved effective in delivering a prescribed concentration of oxygen from the time of acute exacerbation until returning home in a patient with chronic obstructive pulmonary disease, dementia and sleep-related hypoventilation. The nasal high-flow oxygen therapy system is currently used as a device to administer high concentrations of oxygen in many patients with type I respiratory failure, but may also be useful instead of a Venturi mask in patients like ours with type II respiratory failure, additionally providing some positive end-expiratory pressure.
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Affiliation(s)
- Miyuki Okuda
- Osaka Hospital, Internal Medicine Department, Neyagawakoen 2276-1, Neyagawa City, Osaka 572-0854, Japan.
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Hashimoto Y, Asai T, Arai T, Okuda Y. Effect of cricoid pressure on placement of the I-gel™ : a randomised study. Anaesthesia 2014; 69:878-82. [PMID: 24866121 DOI: 10.1111/anae.12731] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2014] [Indexed: 11/30/2022]
Abstract
We studied 40 adult patients to see if cricoid pressure affected placement of the I-gel(™). In a randomised crossover design, the i-gel was placed with and without cricoid pressure, and we compared the success rate of adequate ventilation through the i-gel, time to placement and the rate of optimal position of the device between the two circumstances. Cricoid pressure significantly decreased the success rate of adequate ventilation through the i-gel (40 vs 34 patients) (p = 0.041, 95% CI for difference 4-26%), and significantly decreased the rate of the optimal position (39 vs 17 patients) (p < 0.001). The time to achieve adequate ventilation was significantly longer (p < 0.001) with cricoid pressure than without (median difference 8 s; 95% CI for median difference 3-12 s). Cricoid pressure significantly decreases the success rate of ventilation through the i-gel, but the success rate of ventilation through the i-gel is reasonably high.
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Affiliation(s)
- Y Hashimoto
- Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan
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Oyama T, Kohno N, Oyama H, Okuda Y, Namba S, Takasugi K. Serum KL-6: a useful marker for early detection of methotrexate-induced interstitial pneumonia. Mod Rheumatol 2014; 12:366-7. [DOI: 10.3109/s101650200067] [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: 11/13/2022]
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Okuda Y, Ohnishi M, Takasugi K. THU0091 Comparison of the clinical utility of anti-IL-6 receptor antibody therapy and anti-TNF therapy in aa amyloidosis in rheumatic disease. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Takada-Iwao A, Seki M, Nakanishi M, Souma J, Okuda S, Okuda Y, Imai Y, Sato S. Porcine circovirus type 2 (PCV2) vaccination reduces PCV2 in a PCV2 and Salmonella enterica serovar Choleraesuis coinfection model. Vet Microbiol 2013; 162:219-23. [DOI: 10.1016/j.vetmic.2012.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 10/01/2012] [Accepted: 10/05/2012] [Indexed: 11/30/2022]
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Mukai M, Yokooka Y, Seki M, Okuda Y, Ando Y. Proposal of the Cooperation Method Between EMR/CPOE-RIS-TMS by Using the IHE (integrating the Healthcare Enterprise) - Implementation and Challenge. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2252] [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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Mokuda S, Sawada N, Matoba K, Yamada A, Onishi M, Okuda Y, Jouyama K, Murata Y, Takasugi K. Serum undercarboxylated osteocalcin level increases with 48 weeks of teriparatide treatment in pre-treated elderly rheumatoid arthritis patients who use anti-resorptive drugs. J Endocrinol Invest 2012; 35:796-9. [PMID: 23135318 DOI: 10.1007/bf03347100] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIM The serum undercarboxylated osteocalcin (ucOC) level, a biochemical bone marker of vitamin K insufficiency, is often affected by anti-osteoporosis drugs. There have been no reports regarding the relationship between ucOC and teriparatide. SUBJECTS AND METHODS We conducted a prospective observational study of 26 female rheumatoid arthritis (RA) patients. The patients were divided into 3 groups: those who underwent a direct switch from anti-resorptive drugs to teriparatide (12 cases), those who started teriparatide without pre-treatment (5 cases), and the control patients (9 cases). The median age (interquartile range) of the patients in each group was 75 (67-77), 82 (78-84), and 69 (62-80) yr, respectively. All patients, except controls, received 48-week treatments of teriparatide. We analyzed the median 48-week changes from baseline of the serum ucOC levels with the Steel-Dwass method. RESULTS The median change from baseline in the direct switch group was higher than that in other groups (p<0.05). CONCLUSIONS The serum ucOC levels increased with treatment of teriparatide in elderly RA patients, especially when the patients received pre-treatment.
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Affiliation(s)
- S Mokuda
- Department of Internal Medicine, Center for Rheumatic Diseases, Dohgo Spa Hospital, Matsuyama City, Ehime, Japan.
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Okuda M, Kashio M, Tanaka N, Fujii T, Okuda Y. Positive outcome of average volume-assured pressure support mode of a Respironics V60 Ventilator in acute exacerbation of chronic obstructive pulmonary disease: a case report. J Med Case Rep 2012; 6:284. [PMID: 22963752 PMCID: PMC3485098 DOI: 10.1186/1752-1947-6-284] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 05/17/2012] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION We were able to treat a patient with acute exacerbation of chronic obstructive pulmonary disease who also suffered from sleep-disordered breathing by using the average volume-assured pressure support mode of a Respironics V60 Ventilator (Philips Respironics: United States). This allows a target tidal volume to be set based on automatic changes in inspiratory positive airway pressure. This removed the need to change the noninvasive positive pressure ventilation settings during the day and during sleep. The Respironics V60 Ventilator, in the average volume-assured pressure support mode, was attached to our patient and improved and stabilized his sleep-related hypoventilation by automatically adjusting force to within an acceptable range. CASE PRESENTATION Our patient was a 74-year-old Japanese man who was hospitalized for treatment due to worsening of dyspnea and hypoxemia. He was diagnosed with acute exacerbation of chronic obstructive pulmonary disease and full-time biphasic positive airway pressure support ventilation was initiated. Our patient was temporarily provided with portable noninvasive positive pressure ventilation at night-time following an improvement in his condition, but his chronic obstructive pulmonary disease again worsened due to the recurrence of a respiratory infection. During the initial exacerbation, his tidal volume was significantly lower during sleep (378.9 ± 72.9mL) than while awake (446.5 ± 63.3mL). A ventilator that allows ventilation to be maintained by automatically adjusting the inspiratory force to within an acceptable range was attached in average volume-assured pressure support mode, improving his sleep-related hypoventilation, which is often associated with the use of the Respironics V60 Ventilator. Polysomnography performed while our patient was on noninvasive positive pressure ventilation revealed obstructive sleep apnea syndrome (apnea-hypopnea index = 14), suggesting that his chronic obstructive pulmonary disease was complicated by obstructive sleep apnea syndrome. CONCLUSION In cases such as this, in which patients with severe acute respiratory failure requiring full-time noninvasive positive pressure ventilation therapy also show sleep-disordered breathing, different ventilator settings must be used for waking and sleeping. On such occasions, the Respironics V60 Ventilator, which is equipped with an average volume-assured pressure support mode, may be useful in improving gas exchange and may achieve good patient compliance, because that mode allows ventilation to be maintained by automatically adjusting the inspiratory force to within an acceptable range whenever ventilation falls below target levels.
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Affiliation(s)
- Miyuki Okuda
- Osaka Hospital, Neyagawakoen 2276-1, Neyagawa City, Osaka, 572-0854, Japan
| | - Makoto Kashio
- Osaka Hospital, Neyagawakoen 2276-1, Neyagawa City, Osaka, 572-0854, Japan
| | - Nobuya Tanaka
- Osaka Hospital, Neyagawakoen 2276-1, Neyagawa City, Osaka, 572-0854, Japan
| | - Takashi Fujii
- Osaka Hospital, Neyagawakoen 2276-1, Neyagawa City, Osaka, 572-0854, Japan
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Abstract
Superfluid (3)He is an intensively investigated and well characterized p-wave superfluid. In the bulk Balian-Werthamer state, which is commonly called the (3)He B phase, the superfluid gap is opened isotropically but near a flat boundary such as a wall of a container it can harbor interesting quasi-particle states inside the gap. These states are called surface Andreev bound states, and have not been experimentally explored in detail. Transverse acoustic impedance measurement has revealed their existence and provided spectroscopic details of the dispersion of the bound states. Recent theoretical arguments claim that the surface Andreev bound states of the superfluid (3)He B phase can be recognized as the edge states of the topological superfluid and be regarded as a Majorana fermion, a fancy particle which has not been confirmed in elementary particle physics. In this review, we present up-to-date knowledge on the surface Andreev bound states of the (3)He B phase revealed by acoustic spectroscopy and the possible realization of a Majorana fermion, along with related studies on this topic.
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Affiliation(s)
- Y Okuda
- Department of Physics, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
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Mokuda S, Okuda Y, Onishi M, Sawada N, Matoba K, Yamada A, Jouyama K, Takasugi K. Post-menopausal women with rheumatoid arthritis who are treated with raloxifene or alendronate or glucocorticoids have lower serum undercarboxylated osteocalcin levels. J Endocrinol Invest 2012; 35:661-4. [PMID: 21970822 DOI: 10.3275/7971] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Serum undercarboxylated osteocalcin (ucOC) is a biochemical bone marker of vitamin K insufficiency. It had been reported that bone resorption inhibitors tend to decrease the serum ucOC level in patients with primary osteoporosis. In rheumatoid arthritis (RA) patients, these results have never been reported. AIM We investigated risk factors which could change serum ucOC level in post-menopausal women with RA (no.=100). SUBJECTS AND METHODS Twenty patients received no bone resorption inhibitor (control), 30 received raloxifene (RLX), while 50 received alendronate (ALN). This cross-sectional study was limited to patients with low RA disease activity (Disease Activity Score-28 ≤3.2). We measured serum ucOC, and the data were analyzed by multivariable analysis, including ucOC and the other variables. RESULTS Scheffe's F test demonstrated a significant difference in serum ucOC levels between controls and the RLX group (p<0.01), and between controls and the ALN group (p<0.01). Serum ucOC levels were low in both treated groups. An adjusted multivariate analysis was performed for the variables: bone resorption inhibitor use, serum alkaline phosphatase, glucocorticoid dose, age, estimated glomerular filtration rate and matrix metalloproteinase 3. As a result, serum ucOC inversely correlated with bone resorption inhibitor use (p<0.01) and oral glucocorticoid dose (p<0.01), which were independent risk factors of lowering ucOC. CONCLUSIONS Bone resorption inhibitors and glucocorticoids were independent risk factors for lowering serum ucOC levels in post-menopausal RA patients.
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Affiliation(s)
- S Mokuda
- Department of Internal Medicine, Center for Rheumatic Diseases, Dohgo Spa Hospital, 21-21 Otsu Dohgo-Himezuka, Matsuyama, Ehime, 790-0858, Japan.
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Mukai M, Okuda Y, Yokooka Y, Seki M, Ando Y, Tsuji H. EP-1484 CONSTRUCTION OF THE COOPERATION BETWEEN THE HIS AND TMS BY USING IHE ESI INTEGRATION PROFILE. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71817-0] [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: 10/28/2022]
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Murakawa S, Wasai M, Akiyama K, Wada Y, Tamura Y, Nomura R, Okuda Y. Strong suppression of the Kosterlitz-Thouless transition in a 4He film under high pressure. Phys Rev Lett 2012; 108:025302. [PMID: 22324695 DOI: 10.1103/physrevlett.108.025302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Indexed: 05/31/2023]
Abstract
We have found that the surface specularity for 3He quasiparticle scattering is closely related to the superfluidity and the Kosterlitz-Thouless (KT) transition of 4He film adsorbed on the surface. The specularity is determined by measurements of the transverse acoustic impedance of bulk liquid 3He. The unique point of our system is that we can control the correlation among 4He atoms in the film by changing the pressure of the bulk 3He. The observed KT transition temperature is significantly suppressed by increasing the pressure, which suggests a strong correlation effect on KT transition.
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Affiliation(s)
- S Murakawa
- Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
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Takada-Iwao A, Nakanishi M, Souma J, Chikata S, Okuda Y, Imai Y, Sato S. Porcine circovirus type 2 potentiates morbidity of Salmonella enterica serovar Choleraesuis in Cesarean-derived, colostrum-deprived pigs. Vet Microbiol 2011; 154:104-12. [PMID: 21782358 DOI: 10.1016/j.vetmic.2011.06.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 06/23/2011] [Accepted: 06/28/2011] [Indexed: 10/18/2022]
Abstract
PROBLEM ADDRESSED Porcine circovirus type 2 (PCV2) and Salmonella enterica subspecies enterica serovar Choleraesuis (S. Choleraesuis) are two leading causes of economic loss in the swine industry. Although S. Choleraesuis infection occurs concurrently with PCV2-associated disease in many swine herds, the pathogenesis of concurrent infection with PCV2 and S. Choleraesuis remains largely undefined. OBJECTIVE We investigated the interactions between PCV2 and S. Choleraesuis in 20 Cesarean-derived, colostrum-deprived (CDCD) pigs randomly assigned to 4 groups (n=5 per group). METHODS AND APPROACH Pigs in the dual-infected and PCV2-infected groups were inoculated intranasally with PCV2 at 5 weeks of age, and pigs in the dual-infected and S. Choleraesuis-infected groups were inoculated intranasally with S. Choleraesuis at 7 weeks of age. Pigs in the control group served as uninfected controls. RESULTS After S. Choleraesuis inoculation, severe clinical signs, reduction of weight gain, and severe microscopic lung lesions were observed in dual-infected pigs compared to those in other groups. In addition, the pigs in the dual-infected group shed significantly (P=0.002) higher quantities of S. Choleraesuis in feces 12 days after S. Choleraesuis inoculation, and S. Choleraesuis was recovered from more tissues in this group 14 days after S. Choleraesuis inoculation. CONCLUSIONS These results indicate that prior PCV2 infection potentiates the severity of clinical signs, lung lesions, and fecal shedding and tissue dissemination of S. Choleraesuis in infected pigs. Therefore, dual infection of pigs with PCV2 and S. Choleraesuis may increase clinical effects of salmonellosis in the field.
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Affiliation(s)
- A Takada-Iwao
- Zen-noh Institute of Animal Health, 7 Ohja-machi, Sakura, Chiba 285-0043, Japan.
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Abstract
404 Background: Treatment options for metastatic renal cell carcinoma (mRCC) have increased. Complete remission is, however, rarely seen and patients are treated with multiple sequential therapies. We assessed clinical activity of sorafenib rechallenge after progressing on other therapies. Methods: Patients with mRCC who received a second course of sorafenib therapy after failure of prior sorafenib and other agents were retrospectively identified. RECIST-defined objective response rate and progression-free survival (PFS) and toxicity were analyzed. Results: Fourteen patients with mRCC who were retreated with sorafenib were identified and twelve patients were assessable for this study. 92% were male. Median age at first systemic therapy was 63 years. Prior nephrectomy was performed in 92% of patients. 42% of patients had favorable or intermediate risk, 17% poor, and the rest not available per MSKCC criteria. Eighty-three percent of patients were treated with other agents before initial sorafenib therapy, including 75% interferon-alpha (IFN-alpha), 50% interleukin-2 (IL-2), and 17% sunitinib. First sorafenib therapy began a median of 9.0 months after the diagnosis of mRCC and produced a clinical benefit (PR + SD) rate of 75% and a median PFS of 5.0 months. 67% of patients discontinued initial sorafenib for disease progression and 33% for adverse events. Interval between discontinuation of initial sorafenib and rechallenge was a median of 7.6 months. During the intervening period, 50% of patients were treated with sunitinib, 33% with everolimus, 25% with VEGFR1 vaccine, and others. Clinical benefit rate of 67% and a median PFS of 4.3 months were obtained on sorafenib rechallenge. There was no significant difference in outcome to sorafenib rechallenge based on duration between sorafenib treatments or number or type of intervening treatments. No new severe toxicity was observed during rechallenge. Conclusions: Sorafenib rechallenge has potential to achieve clinical benefits, is well-tolerated, and may be considered after multiple sequential therapies in select mRCC patients. No significant financial relationships to disclose.
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Affiliation(s)
- M. Nozawa
- Kinki University School of Medicine, Osaka-Sayama, Japan
| | - N. Matsumura
- Kinki University School of Medicine, Osaka-Sayama, Japan
| | - M. Yasuda
- Kinki University School of Medicine, Osaka-Sayama, Japan
| | - Y. Okuda
- Kinki University School of Medicine, Osaka-Sayama, Japan
| | - H. Uemura
- Kinki University School of Medicine, Osaka-Sayama, Japan
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Dodo T, Uchida K, Hirose T, Fukuta T, Kojima C, Shiraishi I, Kato E, Horiba T, Mineshima H, Okuda Y, Maeda M, Katsutani N, Hirano K, Aoki T. Increases in discontinuous rib cartilage and fused carpal bone in rat fetuses exposed to the teratogens, busulfan, acetazolamide, vitamin A, and ketoconazole. Hum Exp Toxicol 2010; 29:439-50. [DOI: 10.1177/0960327110363862] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Skeletal changes induced by treatment of pregnant rats with four potent teratogens, busulfan, acetazolamide, vitamin A palmitate, and ketoconazole, were evaluated using Alizarin Red S and Alcian Blue double-staining to investigate the relationship between drug-induced skeletal malformations and cartilaginous changes in the fetuses. Pregnant rats (N = 8/group) were treated once or twice between gestation days (GDs) 10 to 13 with busulfan at doses of 3, 10, or 30 mg/kg; acetazolamide at 200, 400, or 800 mg/kg; vitamin A palmitate at 100,000, 300,000, or 1,000,000 IU/kg; or ketoconazole at doses of 10, 30, or 100 mg/kg. Uterine evaluations and fetal external and skeletal examinations were conducted on GD 20. Marked skeletal abnormalities in ribs and hand/forelimb bones such as absent/ short/bent ribs, fused rib cartilage, absent/fused forepaw phalanx, and misshapen carpal bones were induced at the mid- and high-doses of busulfan and acetazolamide and at the high-dose of vitamin A palmitate and ketoconazole. Increased incidences of discontinuous rib cartilage (DRC) and fused carpal bone (FCB) were observed from the low- or mid-dose in the busulfan and acetazolamide groups, and incidences of FCB were increased from the mid-dose in the vitamin A palmitate and ketoconazole groups. Therefore, DRC and FCB were detected at lower doses than those at which ribs and hand/forelimb malformations were observed in the four potent teratogens.
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Affiliation(s)
- T. Dodo
- Planning & Coordination, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan, , Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi Gifu-shi, Gifu 502-8585, Japan
| | - K. Uchida
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - T. Hirose
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - T. Fukuta
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - C. Kojima
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - I. Shiraishi
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - E. Kato
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - T. Horiba
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - H. Mineshima
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - Y. Okuda
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - M. Maeda
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Ibaraki, Japan
| | - N. Katsutani
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
| | - K. Hirano
- Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi Gifu-shi, Gifu 502-8585, Japan
| | - T. Aoki
- Drug Safety Japan, Biopharmaceutical Assessments Core Function Unit, Eisai Co., Ltd., Gifu, Japan
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Murakawa S, Tamura Y, Wada Y, Wasai M, Saitoh M, Aoki Y, Nomura R, Okuda Y, Nagato Y, Yamamoto M, Higashitani S, Nagai K. New anomaly in the transverse acoustic impedance of superfluid 3He-B with a wall coated by several layers of 4He. Phys Rev Lett 2009; 103:155301. [PMID: 19905647 DOI: 10.1103/physrevlett.103.155301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 09/18/2009] [Indexed: 05/28/2023]
Abstract
We measured the transverse acoustic impedance of superfluid 3He-B with a wall coated by several layers of 4He. The coating is known to enhance the specularity in quasiparticle scattering by the wall. We found a new anomaly, a bump and a peak, in the temperature dependence of the transverse acoustic impedance. This agrees with a theoretical calculation using a partially specular wall boundary condition. The new anomaly is shown to arise from a change in the surface density of states by coating and the scattering of thermally occupied surface bound states to other states. The change is towards the density of states of Majorana cone in the specular limit.
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Affiliation(s)
- S Murakawa
- Department of Condensed Matter Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
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38
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Nozawa M, Oki T, Okuda Y, Minami T, Hayashi T, Nagae S, Nishigaki K, Mochida Y, Uemura H. 7125 Tolerability and adverse events of sunitinib in Japanese patients with advanced renal cell carcinoma. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71458-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Okuda Y, Irisawa Y, Okimoto K, Osawa T, Yamashita S. A new formulation for orally disintegrating tablets using a suspension spray-coating method. Int J Pharm 2009; 382:80-7. [PMID: 19686825 DOI: 10.1016/j.ijpharm.2009.08.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 06/23/2009] [Accepted: 08/09/2009] [Indexed: 11/25/2022]
Abstract
The aim of this study was to design a new orally disintegrating tablet (ODT) that has high tablet hardness and a fast oral disintegration rate using a new preparation method. To obtain rapid disintegration granules (RDGs), a saccharide, such as trehalose, mannitol, or lactose, was spray-coated with a suspension of corn starch using a fluidized-bed granulator (suspension method). As an additional disintegrant, crospovidone, light anhydrous silicic acid, or hydroxypropyl starch was also included in the suspension. The RDGs obtained possessed extremely large surface areas, narrow particle size distribution, and numerous micro-pores. When tabletting these RDGs, it was found that the RDGs increased tablet hardness by decreasing plastic deformation and increasing the contact frequency between granules. In all tablets, a linear relationship was observed between tablet hardness and oral disintegration time. From each linear correlation line, a slope (D/H value) and an intercept (D/H(0) value) were calculated. Tablets with small D/H and D/H(0) values could disintegrate immediately in the oral cavity regardless of the tablet hardness and were considered to be appropriate for ODTs. Therefore, these values were used as key parameters to select better ODTs. Of all the RDGs prepared in this study, mannitol spray-coated with a suspension of corn starch and crospovidone (2.5:1 w/w ratio) showed most appropriate properties for ODTs; fast in vivo oral disintegration time, and high tablet hardness. In conclusion, this simple method to prepare superior formulations for new ODTs was established by spray-coating mannitol with a suspension of appropriate disintegrants.
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Affiliation(s)
- Y Okuda
- Towa Pharmaceutical Co., Ltd., 26-7 Ichiban-Cho, Kadoma, Osaka 571-0033, Japan.
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Liu E, Asai T, Matsumoto S, Hirabayashi Y, Seo N, Suzuki A, Toi T, Yasumoto K, Okuda Y. The Airway Scope, a new video laryngoscope: its use in 253 patients with difficult airways. J Clin Anesth 2009. [DOI: 10.1016/j.jclinane.2008.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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41
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Okuda M, Tanaka N, Kashio M, Sagara N, Aozasa K, Okuda Y, Tsuyuguchi I. Rapid improvement of massive bloody pleural effusion after splenectomy for splenic marginal zone lymphoma. BMJ Case Rep 2009; 2009:bcr0920080974. [PMID: 21687049 DOI: 10.1136/bcr.09.2008.0974] [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: 11/04/2022] Open
Abstract
Splenic marginal zone lymphoma (SMZL) is a rare malignant lymphoma involving marginal zone B cells, accounting for only 1% of non-Hodgkin lymphomas. No previous reports have documented SMZL accompanied by massive bloody pleural effusion. Herein, the case of a patient with SMZL that was only diagnosed after splenectomy and thoracoscopic pleural biopsy is presented. SMZL in this patient was accompanied by massive bloody pleural effusion. The characteristics of the patient's pleural effusion changed from bloody to transudative after splenectomy, and rapid improvement was observed. It was considered that the splenectomy was valid for treatment of unidentified pleural effusion with enlarged spleen.
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Affiliation(s)
- Miyuki Okuda
- Osaka Hospital, Neyagawakoen 2276-1, Neyagawa City, Osaka, 572-0854, Japan
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42
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Mukuda H, Fujii T, Ohara T, Harada A, Yashima M, Kitaoka Y, Okuda Y, Settai R, Onuki Y. Enhancement of superconducting transition temperature due to the strong antiferromagnetic spin fluctuations in the noncentrosymmetric heavy-fermion superconductor CeIrSi3: A 29Si NMR study under pressure. Phys Rev Lett 2008; 100:107003. [PMID: 18352225 DOI: 10.1103/physrevlett.100.107003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Indexed: 05/26/2023]
Abstract
We report a (29)Si NMR study on the pressure-induced superconductivity (SC) in an antiferromagnetic (AFM) heavy-fermion compound CeIrSi(3) without inversion symmetry. In the SC state at P = 2.7-2.8 GPa, the temperature (T) dependence of the nuclear-spin lattice relaxation rate 1/T(1) below T(c) exhibits a T(3) behavior without any coherence peak just below T(c), revealing the presence of line nodes in the SC gap. In the normal state, 1/T(1) follows a square root T-like behavior, suggesting that the SC emerges under the non-Fermi-liquid state dominated by AFM spin fluctuations enhanced around a quantum critical point. The reason why the maximum T(c) in CeIrSi(3) is relatively high among the Ce-based heavy-fermion superconductors may be the existence of the strong AFM spin fluctuations. We discuss the comparison with the other Ce-based heavy-fermion superconductors.
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Affiliation(s)
- H Mukuda
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan.
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Enomoto Y, Asai T, Arai T, Kamishima K, Okuda Y. Pentax-AWS, a new videolaryngoscope, is more effective than the Macintosh laryngoscope for tracheal intubation in patients with restricted neck movements: a randomized comparative study. Br J Anaesth 2008; 100:544-8. [PMID: 18238836 DOI: 10.1093/bja/aen002] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND We studied whether laryngoscopy and tracheal intubation were easier when using the Pentax-AWS (Tokyo, Japan), a new videolaryngoscope, than when applying the Macintosh laryngoscope, during manual in-line neck stabilization. METHODS In 203 anaesthetized patients with manual in-line neck stabilization, we inserted the Pentax-AWS and a Macintosh laryngoscope, in turn, and recorded the view of the glottis and time taken to laryngoscopy. The success rate of tracheal intubation (within 120 s) and time to intubation were also recorded. RESULTS The view of the glottis was significantly better with the Pentax-AWS than with the Macintosh laryngoscope (P<0.001). For the Macintosh laryngoscope, the view was obscured in 22 of 203 patients (11%) (Grade 3 in 21 patients and Grade 4 in one patient), whereas for the Pentax-AWS, the glottis was always clearly seen (Grade 1). Time taken to see the glottis with the Pentax-AWS [mean (sd): 6.0 (3.1) s] was significantly shorter than with the Macintosh laryngoscope [11.0 (5.0) s] (95% CI for difference: 4-6 s). The success rate of tracheal intubation with the Pentax-AWS (all of 99 patients) was significantly higher than with the Macintosh laryngoscope (93 of 104 patients) (P=0.001). Time taken for intubation was similar between the Macintosh laryngoscope [51 (27) s] and the Pentax-AWS [54 (14) s] (95% CI for difference: -9 to 3 s). CONCLUSIONS In patients with stabilized neck, the Pentax-AWS provided a better view of the glottis and a higher success rate of tracheal intubation, compared with the conventional Macintosh laryngoscope.
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Affiliation(s)
- Y Enomoto
- Department of Anaesthesiology, Koshigaya Hospital, Dokkyo Medical University, Koshigaya City, Saitama, Japan
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Seita Y, Sugio S, Sano D, Nakada M, Hoshina M, Okuda Y, Ito J, Kashiwazaki N. 273 REMOVAL OF ACROSOME FROM SPERM HEADS IMPROVES DEVELOPMENT OF RAT ZYGOTES THROUGH INTRACYTOPLASMIC SPERM INJECTION. Reprod Fertil Dev 2008. [DOI: 10.1071/rdv20n1ab273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
In intracytoplasmic sperm injection (ICSI), sperm chromatin is introduced into the oocyte together with acrosome, which does not enter cytoplasm of oocytes during normal fertilization. In mice, acrosome of sperm head has a detrimental effect on embryonic development of the ICSI oocytes (Morozumi et al. 2006 Proc. Natl. Acad. Sci. USA 103, 17 661–17 666). We examined the effect of acrosome removal of frozen/thawed (F/T) rat sperm on development to term of the ICSI oocytes in order to improve production efficiency of live offspring from F/T rat spermatozoa through ICSI. In experiment 1, epididymal spermatozoa of the Wistar rats were frozen as described previously (Seita et al. 2005 Reprod. Fertil. Dev. 18, 256 abst). The F/T spermatozoa were sonicated to separate sperm heads. The sperm heads were divided into 3 treatment groups; nontreated sperm head (control), sperm heads exposed in 0.02% of Triton X-100 solution for 1 min (TX), sperm heads exposed in 0.02% lysolectin solution for 1 min (LL). Acrosomal status of the sperm heads was then examined by FITC-peanut agglutinin stain. In experiment 2, sperm heads of the control, TX, and LL treatments were microinjected into denuded oocytes obtained from superovulated females (Hirabayashi et al. 2002 Transgenic Res. 11, 221–228). The ICSI oocytes were cultured and observed for the formation of pronuclei (2PN) for 6 h and blastocyst formation at 120 h of culture. In experiment 3, the ICSI oocytes cultured for 6 h were transferred to recipient females to examine development to term. Statistical analyses of the results were carried out by 1-way ANOVA. In experiment 1, the TX (76%) and LL (89%) treatments showed higher rates of acrosome removal than that of the control (24%) group (P < 0.05). In experiment 2, the percentage of 2PN formation at 6 h after ICSI was not significantly different among sperm-treated groups, although the TX (76%) and LL (70%) groups were higher than the control (24%) group at 4 h (P < 0.05). The percentages of blastocyst formation were not significantly different among sperm-treated groups (control: 10%; TX: 25%; and LL: 25%). In experiment 3, the efficiency of development to term of the TX treatment group (21%: 12/57) was significantly higher than the control (5%: 3/55; P < 0.05), although the LL treatment group (16%: 12/75) was not significantly different from the control and TX treatment groups. These results indicate that acrosome removal using TX of F/T rat sperm heads before ICSI improves development to term of the ICSI oocytes. This benefical effect of acrosome removal may be due to the quick release of sperm-activating factors from sperm heads after ICSI in the rat.
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Seita Y, Sugio S, Sano D, Okuda Y, Kashiwazaki N. 313 IMPROVEMENT OF FERTILIZATION IN VITRO BY PRE-INCUBATION OF FROZEN - THAWED RAT SPERMATOZOA WITH CAFFEINE-SUPPLEMENTED MEDIUM. Reprod Fertil Dev 2007. [DOI: 10.1071/rdv19n1ab313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We previously reported the successful production of live offspring from cryopreserved rat spermatozoa through IVF (2006 Reprod. Fertil. Dev. 18, 256). The objective of the present study was to improve the IVF system with frozen–thawed spermatozoa for more efficient reproduction of live offspring. We examined the effect of caffeine-supplemented medium on post-thaw sperm fertility in vitro. Epididymal spermatozoa of Wistar rats were cryopreserved in 2.0 mL of freezing medium containing 23% (v/v) egg yolk, 8.0% (w/v) lactose monohydrate, and 0.7% (v/v) Equex STM. Post-thaw spermatozoa were diluted to 0.5 to 1.5 � 106 sperm mL-1 in a droplet of 200 �L of R1ECM as the pre-incubation medium. In Experiment 1, the effect of caffeine-supplemented medium on fertility in vitro was examined. The post-thaw spermatozoa were incubated for 5 h in pre-incubation medium with added caffeine at concentrations of 0, 1, 2, and 4 mM. Ovulated oocytes were introduced into droplets of the pre-incubation medium and co-cultured for 10 h. The oocytes were denuded and fixed to examine for 2 pronuclei formation (2PNF). In Experiment 2, the effect of caffeine-supplemented medium on post-thaw sperm function was examined using the chlortetracycline (CTC) fluorescence assessment. The post-thaw spermatozoa were incubated in pre-incubation medium with added caffeine at concentrations of 0 (Caf+) and 2 mM (Caf-), and CTC patterns were examined hourly until 6 h later. Statistical analyses of the results were carried out by one-way ANOVA. In Experiment 1, the percentages of 2PNF were 14 � 6, 32 � 8, 42 � 4, and 27 � 5% for the 0, 1, 2, and 4-mM groups, respectively, and only the 2-mM group was different from the 0-mM group (P < 0.05). In Experiment 2, the rate of capacitated spermatozoa was not significantly different (P > 0.05) among incubation times in the Caf+ group, but the rates at 5 and 6 h were lower (P < 0.05) than the rate at 1 h in the Caf- group. Although the rates of acrosome-reacted spermatozoa were not significantly different (P > 0.05) in the Caf+ group after 3 h of incubation, the accelerated trend of the acrosome reaction was observed in the Caf- group with increasing incubation time. The results demonstrated that frozen–thawed rat spermatozoa pre-incubated in medium containing 2 mM caffeine could improve in vitro fertility. This positive effect of caffeine would be provided to induce and keep sperm capacitation, and to inhibit the spontaneous sperm acrosome reaction in frozen–thawed rat spermatozoa.
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Abstract
The purpose of the present study was to investigate porcine circovirus (PCV) shedding into the milk of sows. Colostrum was collected from 33 sows. PCV1 was isolated from four of 33 milk whey samples. PCV1 DNA was detected by polymerase chain reaction in three of these samples and in three of 10 milk cell samples. PCV2 was also isolated and detected from every single milk whey sample. These results showed that PCV1 and PCV2 were shed into the milk of sows and suggest that PCV can be transmitted to offspring by an oral route through milk.
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Affiliation(s)
- I Shibata
- Zen-Noh Institute of Animal Health, 7 Ohja-Machi, Sakura, Chiba 285-0043, Japan.
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Nomura R, Miyashita W, Yoneyama K, Okuda Y. Dynamics of capillary condensation in aerogels. Phys Rev E Stat Nonlin Soft Matter Phys 2006; 73:032601. [PMID: 16605581 DOI: 10.1103/physreve.73.032601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Revised: 01/24/2006] [Indexed: 05/08/2023]
Abstract
Dynamics of capillary condensation of liquid 4He in various density silica aerogels was investigated systematically. Interfaces were clearly visible when bulk liquid was rapidly sucked into the aerogel. Time evolution of the interface positions was consistent with the Washburn model and their effective pore radii were obtained. Condensation was a single step in a dense aerogel and two steps in a low density aerogel. Crossover between the two types of condensation was observed in an intermediate density aerogel. Variety of the dynamics may be the manifestation of the fractal nature of aerogels which had a wide range of distribution of pore radii.
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Affiliation(s)
- R Nomura
- Department of Condensed Matter Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan
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Seita Y, Okuda Y, Takizawa A, Hisamatu S, Inomata T, Kashiwazaki N. 297 BIRTH OF LIVE RATS THROUGH IN VITRO FERTILIZATION USING CRYOPRESERVED SPERMATOZOA: SPERM FERTILITY IMPROVED BY FREEZING AT - 150°C. Reprod Fertil Dev 2006. [DOI: 10.1071/rdv18n2ab297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We previously reported that damages to spermatozoa by cold shock can be avoided by cooling slowly at 0.5�C/min to 5.0�C (Seita et al. 2005 Reprod. Fertil. Dev. 17, 277-278). The objective of the present study was to develop an in vitro fertilization (IVF) system with frozen-thawed rat spermatozoa for more efficient reproduction of live offspring. We examined the effect of freezing temperatures (cooling 5.0�C to pre-plunging) on post-thaw sperm motility, plasma membrane integrity, and fertility in vitro. Epididymal spermatozoa of Wistar rats were collected in 2.0 mL of freezing medium containing 23% (v/v) egg yolk, 8.0% (w/v) lactose monohydrate, and 0.7% (v/v) Equex STM (Nova Animal Sales, Inc., Scituate, MA, USA) at room temperature. Samples were loaded into 0.25-mL straws and cooled to 5.0�C at 0.5�C/min in a programmable freezer. Next, the samples were exposed to liquid nitrogen (LN) vapor at various freezing temperatures (-120�C, -150�C or -180�C) above the LN level for 15 min and then plunged into LN. Straws were thawed in a 37�C water bath for 10 min. The thawed samples were diluted to 0.5-1.5 � 106 sperm/mL in a droplet of 200 �L of R1ECM and then pre-incubated for 5 h. Ovulated oocytes were introduced into the droplet and co-cultured for 10 h. The oocytes were denuded, fixed, and/or examined for two pronuclei (2PN) formation microscopically. The denuded oocytes, which were fertilized with spermatozoa frozen at -150�C and were microscopically confirmed to have 2PN formation, were transferred to pseudo-pregnant recipient females. IVF was also performed by the same method using fresh spermatozoa as the control. Differences in the sperm motility and plasma membrane integrity were analyzed by ANOVA, and the IVF data were analyzed by chi-square test. At 2 h after thawing the motility of spermatozoa frozen at -150�C was significantly higher than that of spermatozoa frozen at -180�C (19.8% and 11.1%; P < 0.05), although the sperm plasma membrane integrity was not significantly different among different freezing temperatures, -120�C, -150�C, and -180�C (18.2%, 23.5%, and 17.9%; P > 0.05). The percentage of oocytes with 2PN was not significantly different between the -150�C frozen and the control (fresh spermatozoa) groups [59% (131/221) and 62% (155/251); P > 0.05], although that of frozen spermatozoa at -120�C and -180�C [20% (38/188) and 23% (35/153)] were significantly lower than that of frozen spermatozoa at -150�C (P < 0.05). A total of 168 putative fertilized zygotes with 2PN were transferred to eleven recipients, and 87 live young were born. In conclusion, our results indicated that post-thaw motility of cryopreserved rat spermatozoa was improved by using a suitable cooling protocol, and the IVF system used in the present study would effectively produce offspring from the cryopreserved epididymal rat spermatozoa. To our knowledge, this procedure is the first successful production of live offspring from cryopreserved rat spermatozoa through in vitro fertilization.
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