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Kamiya S, Sugai T, Oka K, Noda E, Miyazaki A, Hagiwara-Fujishiro R, Yamada M, Yagi T, Akiyama M. Case of monomicrobial necrotizing fasciitis caused by extended-spectrum β-lactamase-producing Citrobacter freundii. J Dermatol 2024. [PMID: 38651762 DOI: 10.1111/1346-8138.17246] [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] [Received: 01/30/2024] [Revised: 03/04/2024] [Accepted: 04/08/2024] [Indexed: 04/25/2024]
Affiliation(s)
- Satoshi Kamiya
- Department of Dermatology, Toyohashi Municipal Hospital, Toyohashi, Japan
- Department of Dermatology, Nagoya University School of Medicine, Nagoya, Japan
| | - Tatsuro Sugai
- Department of Dermatology, Toyohashi Municipal Hospital, Toyohashi, Japan
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan
| | - Eori Noda
- Department of Dermatology, Toyohashi Municipal Hospital, Toyohashi, Japan
| | - Akira Miyazaki
- Department of Dermatology, Toyohashi Municipal Hospital, Toyohashi, Japan
| | | | - Motohito Yamada
- Department of Dermatology, Toyohashi Municipal Hospital, Toyohashi, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan
| | - Masashi Akiyama
- Department of Dermatology, Nagoya University School of Medicine, Nagoya, Japan
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2
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Hirabayashi A, Yahara K, Oka K, Kajihara T, Ohkura T, Hosaka Y, Shibayama K, Sugai M, Yagi T. Comparison of disease and economic burden between MRSA infection and MRSA colonization in a university hospital: a retrospective data integration study. Antimicrob Resist Infect Control 2024; 13:27. [PMID: 38424606 PMCID: PMC10905874 DOI: 10.1186/s13756-024-01383-8] [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: 09/29/2023] [Accepted: 02/10/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND Although there is a growing concern and policy regarding infections or colonization caused by resistant bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), the prognosis of MRSA infections compared to that of methicillin-susceptible Staphylococcus aureus (MSSA) infections remains controversial. Moreover, there have not been any studies comparing both the burden of disease and its impact on the healthcare economy between MRSA infection and colonization while adjusting for confounding factors. These comparisons are crucial for developing effective infection control measures and healthcare policies. We aimed to compare the disease and economic burden between MRSA and MSSA infections and between MRSA infection and colonization. METHODS We retrospectively investigated data of 496 in-patients with MRSA or MSSA infections and of 1178 in-patients with MRSA infections or MRSA colonization from a university hospital in Japan from 2016 to 2021. We compared in-hospital mortality, length of stay, and hospital charges between in-patients with MRSA and MSSA infections and those with MRSA infections and MRSA colonization using multiple regressions. We combined surveillance data, including all microbiological test results, data on patients with infections, treatment histories, and clinical outcomes, to create the datasets. RESULTS There was no statistically significant difference in in-hospital mortality rates between matched MRSA vs. MSSA infections and MRSA infection vs. colonization. On the contrary, the adjusted effects of the MRSA infection compared to those of MSSA infection on length of stay and hospital charges were 1.21-fold (95% confidence interval [CI] 1.03-1.42, P = 0.019) and 1.70-fold (95% CI 1.39-2.07, P < 0.00001), respectively. The adjusted effects of the MRSA infection compared to those of MRSA colonization on length of stay and hospital charges were 1.41-fold (95% CI 1.25-1.58, P < 0.00001) and 1.53-fold (95% CI 1.33-1.75, P < 0.00001), respectively. Regarding confounding factors, hemodialysis or hemofiltration was consistently identified and adjusted for in the multiple regression analyses comparing MRSA and MSSA infections, as well as MRSA infection and MRSA colonization. CONCLUSIONS MRSA infection was associated with longer length of stay and higher hospital charges than both MSSA infection and MRSA colonization. Furthermore, hemodialysis or hemofiltration was identified as a common underlying factor contributing to increased length of stay and hospital charges.
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Affiliation(s)
- Aki Hirabayashi
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan.
| | - Koji Yahara
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan.
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Aichi, Japan
| | - Toshiki Kajihara
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Teruko Ohkura
- Department of Medical Technique, Nagoya University Hospital, Aichi, Japan
| | - Yumiko Hosaka
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Keigo Shibayama
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Aichi , Japan
| | - Motoyuki Sugai
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Aichi, Japan.
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Amano T, Nishikawa T, Oka K, Ota K, Shimizu T. How an Antimicrobial Stewardship Team Treated a Nocardia farcinica-Associated Brain Abscess: A Case Report. Cureus 2024; 16:e54605. [PMID: 38523941 PMCID: PMC10958982 DOI: 10.7759/cureus.54605] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/21/2024] [Indexed: 03/26/2024] Open
Abstract
Nocardia species, which are ubiquitous in the environment, form lesions primarily in immunocompromised patients via oral or cutaneous infection. Some of these Nocardia species, such as N. farcinica, also infect the central nervous system via hematogenous dissemination, which rarely results in brain abscesses. Notably, N. farcinica is resistant to numerous antimicrobial drugs used in empirical therapy, necessitating the intervention of an infectious disease specialist. To date, no case of antimicrobial stewardship teams (ASTs) playing a central role in community hospitals without an infectious disease specialist has been reported. Here, we describe a case of N. farcinica-associated brain abscess in a small-to-medium-sized hospital with no infectious disease department or specialist, in which the AST assisted in the identification of the causative organism and in selecting appropriate therapeutic agents, ultimately leading to a cure. The patient was an 88-year-old man with a high fever. He had been taking prednisolone (10-15 mg/day) for approximately 1 year for pemphigoid. Considering the possibility of fever owing to bacteremia of cutaneous origin, ampicillin/sulbactam antimicrobial therapy at 6 g/day was initiated. A subsequent close examination led to the diagnosis of a brain abscess. Emergency abscess drainage was performed by a neurosurgeon, and postoperative antimicrobial combination therapy comprising ceftriaxone (4 g/day), vancomycin (2 g/day), and metronidazole (1,500 mg/day) was commenced. The AST suspected Nocardia infection earlier, but further testing was difficult to perform at this facility. Therefore, by requesting assistance from Nagoya University Hospital, we performed early bacterial identification by mass spectrometry and appropriate antimicrobial susceptibility testing by a custom panel on day 11. The patient was non-responsive to all the previously used antibiotics at the time of admission. On day 13 after admission, the patient was successfully treated with trimethoprim-sulfamethoxazole (TMP-SMX) and imipenem/cilastatin sodium, and the patient was cured. The AST can be as effective as an infectious disease specialist when a strong working relationship is established between the team and clinicians. Further, the activities of the AST can improve patient survival via active medical support in collaboration with attending physicians.
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Affiliation(s)
- Tetsushi Amano
- Antimicrobial Stewardship Team, Hekinan Municipal Hospital, Hekinan, JPN
- Department of Pharmacy, Hekinan Municipal Hospital, Hekinan, JPN
| | | | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, JPN
| | - Kosei Ota
- Antimicrobial Stewardship Team, Hekinan Municipal Hospital, Hekinan, JPN
- Department of Clinical Laboratory, Hekinan Municipal Hospital, Hekinan, JPN
| | - Taro Shimizu
- Department of Diagnostic and Generalist Medicine, Dokkyo Medical University Hospital, Mibu, JPN
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4
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Solis-Pazmino P, Figueroa L, La K, Termeie O, Oka K, Schleicher M, Cohen J, Barnajian M, Nasseri Y. Liposomal bupivacaine versus conventional anesthetic or placebo for hemorrhoidectomy: a systematic review and meta-analysis. Tech Coloproctol 2024; 28:29. [PMID: 38294561 PMCID: PMC10830612 DOI: 10.1007/s10151-023-02881-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 11/11/2023] [Indexed: 02/01/2024]
Abstract
BACKGROUND Liposome bupivacaine (LB) is a long-acting anesthetic to enhance postoperative analgesia. Studies evaluating the efficacy of the LB against an active comparator (bupivacaine or placebo) on acute postoperative pain control in hemorrhoidectomy procedures are few and heterogeneous. Therefore, we performed a systematic review and meta-analysis comparing LB's analgesic efficacy and side effects to conventional/placebo anesthetic in hemorrhoidectomy patients. METHODS We performed a systematic review and meta-analysis of randomised controlled trials investigating the use of LB after haemorrhoidectomy. We searched the literature published from the time of inception of the datasets to August 19, 2022. The electronic databases included English publications in Ovid MEDLINE In-Process & Other Non-Indexed Citations, Ovid MEDLINE, Ovid EMBASE, and Scopus. RESULTS A total of 338 patients who underwent a hemorrhoidectomy procedure enrolled in three randomized clinical trials were included. The overall mean age was 45.84 years (SD ± 11.43), and there was a male predominance (53.55% male). In total 194 patients (52.2%) received LB and 144 (47.8%) received either bupivacaine or placebo. Pain scores at 72 h in the LB (199, 266, and 300 mg) were significantly lower than in the bupivacaine HCl group (p = 0.002). Compared to the bupivacaine/placebo group, the time to first use of opioids in the LB group was significantly longer at LB 199 mg (11 h vs. 9 h), LB 266 mg (19 h vs. 9 h), and LB 300 mg (19 h vs. 8 h) (p < 0.05). Moreover, compared to the bupivacaine/epinephrine group, it was significantly lower in the LB 266 mg group (3.7 vs. 10.2 mg) and at LB 300 mg (13 vs. 33 mg) (p < 0.05). Finally, regarding adverse effects, the conventional anesthetic/placebo group reported more pain in bowel movement than LB groups (OR 2.60, 95% CI 1.31-5.16). CONCLUSIONS Comparing LB to conventional anesthetic/placebo anesthetic for hemorrhoidectomy, we found a statistically significant reduction in pain through 72 h, decreased opioid requirements, and delayed time to first opioid use. Moreover, the conventional anesthetic/placebo group reported more pain in bowel movement than LB groups.
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Affiliation(s)
- P Solis-Pazmino
- Surgery Group Los Angeles, Los Angeles, CA, USA
- Surgery Department, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil
- Knowledge and Evaluation Research Unit, Mayo Clinic, Rochester, MN, USA
- CaTaLiNA-Cancer de Tiroides en Latino América, Quito, Ecuador
| | - L Figueroa
- CaTaLiNA-Cancer de Tiroides en Latino América, Quito, Ecuador
- Facultad de Ciencias Médicas, Universidad Central del Ecuador, Quito, Ecuador
| | - K La
- Surgery Group Los Angeles, Los Angeles, CA, USA
| | - O Termeie
- Surgery Group Los Angeles, Los Angeles, CA, USA
| | - K Oka
- Surgery Group Los Angeles, Los Angeles, CA, USA
| | | | - J Cohen
- Surgery Group Los Angeles, Los Angeles, CA, USA
| | - M Barnajian
- Surgery Group Los Angeles, Los Angeles, CA, USA
| | - Y Nasseri
- Surgery Group Los Angeles, Los Angeles, CA, USA.
- Cedars-Sinai Medical Center, Los Angeles, CA, USA.
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5
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Morioka H, Koizumi Y, Watariguchi T, Oka K, Tomita Y, Kojima Y, Okudaira M, Ito Y, Shimizu J, Watamoto K, Kato H, Nagaoka M, Yokota M, Hasegawa C, Tsuji T, Shimizu S, Ito K, Kawasaki S, Akita K, Kitagawa Y, Mutoh Y, Ishihara M, Iwata S, Nozaki Y, Nozawa M, Kato M, Katayama M, Yagi T. Surgical antimicrobial prophylaxis in Japanese hospitals: Real status and challenges. J Infect Chemother 2024:S1341-321X(24)00023-0. [PMID: 38272262 DOI: 10.1016/j.jiac.2024.01.013] [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: 08/11/2023] [Revised: 11/24/2023] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
BACKGROUND Information regarding the status of surgical antimicrobial prophylaxis (SAP) in Japanese hospitals is lacking. This study aimed to explore the status of SAP prescriptions for surgeries and adherence to Japanese SAP guidelines. METHODS From February to July 2020, a 1-day multicentre point prevalent survey was conducted at 27 hospitals in Aichi Prefecture, Japan. Patients prescribed SAP were included in this study. The appropriateness of the SAP was evaluated based on the guidelines for selection of antimicrobials and their duration. Surgery was defined as appropriate when all the items were appropriate. RESULTS A total of 728 patients (7.1 %; 728/10,199) received antimicrobials for SAP. Among them, 557 patients (76.5 %, 557/728) underwent the surgeries described in the guidelines. The overall appropriateness of all surgeries was 33.9 % (189/557). The appropriate selection of antimicrobial before/during and after surgery and their durations were 67.5 % (376/557), 67.5 % (376/557), and 43.3 % (241/557), respectively. The overall appropriateness ranged from 0 % (0/37, oral and maxillofacial surgery) to 58.7 % (88/150, orthopaedic surgery) and 27.7 % (36/130, community hospitals with 400-599 beds) to 47.2 % (17/36, specific hospitals). Cefazolin was the most prevalent antimicrobial prescribed before/during (55.5 %, 299/539), and after (45.1 %, 249/552) surgery. In total, 101 oral antimicrobials were prescribed postoperatively. CONCLUSIONS SAP adherence by specific surgical fields and hospitals was shown in this study. Intensive intervention and repeated surveillance are necessary to improve SAP prescriptions in Japanese hospitals.
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Affiliation(s)
- Hiroshi Morioka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan.
| | - Yusuke Koizumi
- Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Nagakute, Japan; Department of Infection Prevention and Control, Wakayama Medical University, Wakayama, Japan
| | | | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan; Antimicrobial Stewardship Team, Kariya Toyota General Hospital, Kariya, Japan
| | - Yuka Tomita
- Department of Infectious Diseases, Japanese Red Cross Aichi Medical Centre Nagoya Daini Hospital, Nagoya, Japan
| | - Yumi Kojima
- Infection Control Team, Nagoya Ekisaikai Hospital, Nagoya, Japan
| | | | - Yuji Ito
- Department of Respiratory Medicine, Daiyukai General Hospital, Ichinomiya, Japan
| | - Junichi Shimizu
- Department of Thoracic Oncology, Aichi Cancer Centre Hospital, Nagoya, Japan
| | - Koichi Watamoto
- Department of Hematology, Komaki City Hospital, Komaki, Japan
| | - Hiroki Kato
- Department of Infectious Diseases, Toyota Memorial Hospital, Toyota, Japan
| | | | - Manabu Yokota
- Department of Pharmacy, Handa City Hospital, Handa, Japan
| | - Chihiro Hasegawa
- Department of Infectious Diseases, Nagoya City East Medical Centre, Nagoya, Japan
| | - Takeshi Tsuji
- Department of Pediatrics, Okazaki City Hospital, Okazaki, Japan
| | - Shinsuke Shimizu
- Infection Control Team, Kamiiida Daiichi General Hospital, Nagoya, Japan
| | - Kenta Ito
- Department of General Pediatrics, Aichi Children's Health and Medical Centre, Obu, Japan
| | - Shohei Kawasaki
- Department of Pharmacy, Nishichita General Hospital, Tokai, Japan
| | - Kenji Akita
- Department of Respiratory Medicine, Nagoya City University West Medical Centre, Nagoya, Japan
| | - Yuichi Kitagawa
- Department of Infection Control, National Centre for Geriatrics and Gerontology, Obu, Japan
| | - Yoshikazu Mutoh
- Department of Infectious Diseases, Tosei General Hospital, Seto, Japan
| | | | - Susumu Iwata
- Department of Respiratory Medicine, Kasugai Municipal Hospital, Kasugai, Japan
| | - Yasuhiro Nozaki
- Department of Respiratory Medicine, Tokoname Municipal Hospital, Tokoname, Japan
| | | | - Munehiro Kato
- Department of Respiratory Medicine, Asahi Rosai Hospital, Owariasahi, Japan
| | - Masao Katayama
- Department of Internal Medicine and Rheumatology and Department of Infection Control Team, NHO Nagoya Medical Center, Nagoya, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan
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6
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Fukuda Y, Morioka H, Yamamoto S, Iguchi M, Umeda S, Asahara T, Kanda K, Oka K, Nakayama G, Yagi T. Catheter-related bloodstream infection caused by Lacticaseibacillus paracasei: A case report and literature review. J Infect Chemother 2024:S1341-321X(24)00002-3. [PMID: 38184108 DOI: 10.1016/j.jiac.2023.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/14/2023] [Accepted: 12/31/2023] [Indexed: 01/08/2024]
Abstract
Catheter-related bloodstream infections (CRBSIs) caused by Lactobacillus spp. and Lacticaseibacillus spp. are rare, and their clinical course and optimal treatment remain uncertain. In this report, we present a 46-year-old male patient who experienced clinically diagnosed Lacticaseibacillus paracasei CRBSI on four separate occasions, despite receiving systemic administration of antibiotics and antimicrobial lock therapy. The patient did not develop L. paracasei bacteremia after catheter removal. This case report furthers our knowledge of CRBSI caused by Lactobacillus and related genera and highlights the need for further research.
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Affiliation(s)
- Yuto Fukuda
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan; Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Hiroshi Morioka
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| | - Shuta Yamamoto
- Yakult Central Institute, Yakult Honsha Co., Ltd., 5-11 Izumi, Kunitachi, Tokyo, 186-8650, Japan
| | - Mitsutaka Iguchi
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Shinichi Umeda
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Takashi Asahara
- Yakult Central Institute, Yakult Honsha Co., Ltd., 5-11 Izumi, Kunitachi, Tokyo, 186-8650, Japan
| | - Kohei Kanda
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Goro Nakayama
- Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
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Lin CY, Shibata A, Ishii K, Koohsari MJ, Hadgraft N, Dunstan DW, Owen N, Oka K. Reallocating desk workers' sitting time to standing or stepping: associations with work performance. Occup Med (Lond) 2023; 73:575-580. [PMID: 38104251 PMCID: PMC10824261 DOI: 10.1093/occmed/kqad142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023] Open
Abstract
BACKGROUND Studies have suggested that sitting time at work may lead to underperformance but they may underestimate the benefits to desk workers' performance of reducing occupational sitting time without considering the relative effects of the specific activities replaced. AIMS To estimate differences in work performance (presenteeism, absenteeism and engagement) when occupational sitting time is reallocated to standing/stepping in desk workers. METHODS Data for middle-aged desk workers were from a Japan-wide online survey (n = 2228). Self-report proportion of occupational sitting and standing/stepping, work hours and work performance indicators, including absolute (ratings relating only to self) and relative (ratings of self, compared to others) presenteeism and absenteeism, and dimensions of work engagement, were collected. Partition and isotemporal substitution models were used to investigate the associations of occupational sitting and standing/stepping time with work performance, including their reallocation effects. RESULTS In partition models, longer occupational sitting time was associated with a lower absolute presenteeism score (i.e. less productivity), lower absolute absenteeism (i.e. longer-than-expected work hours), and lower engagement. Longer occupational standing/stepping time was associated with lower absolute absenteeism and more engagement. Isotemporal substitution models showed that each hour of occupational sitting reallocated to standing/stepping was favourably associated with overall work engagement (B = 0.087; 95% confidence interval 0.051, 0.122) and its dimensions (B ranged from 0.078 to 0.092), but was not associated with presenteeism or absenteeism. CONCLUSIONS These findings suggest that management support and practical initiatives to encourage desk workers to replace portions of their sitting time with standing/stepping may contribute to enhanced work engagement.
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Affiliation(s)
- C-Y Lin
- Department of Public Health, College of Public Health, China Medical University, Taichung, 406040Taiwan
- Faculty of Sport Sciences, Waseda University, Tokorozawa, 359-1192Japan
- Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Victoria, 3122Australia
| | - A Shibata
- Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, 305-8577Japan
| | - K Ishii
- Faculty of Sport Sciences, Waseda University, Tokorozawa, 359-1192Japan
| | - M J Koohsari
- Faculty of Sport Sciences, Waseda University, Tokorozawa, 359-1192Japan
- School of Knowledge Science, Japan Advanced Institute of Science and Technology, Nomi, 923-1292Japan
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, 3216Australia
| | - N Hadgraft
- Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Victoria, 3122Australia
- Physical Activity Laboratory, Baker Heart & Diabetes Institute, Melbourne, Victoria, 3004Australia
| | - D W Dunstan
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, 3216Australia
- Physical Activity Laboratory, Baker Heart & Diabetes Institute, Melbourne, Victoria, 3004Australia
| | - N Owen
- Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Victoria, 3122Australia
- Physical Activity Laboratory, Baker Heart & Diabetes Institute, Melbourne, Victoria, 3004Australia
| | - K Oka
- Faculty of Sport Sciences, Waseda University, Tokorozawa, 359-1192Japan
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8
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Fukaura R, Terashima-Murase C, Ota M, Noda H, Oka K, Ishihara Y, Shibayama K, Akiyama M. Methicillin-resistant Staphylococcus aureus-induced staphylococcal scalded skin syndrome in a preterm infant, and subsequent toxigenic analysis. J Dermatol 2023; 50:e422-e423. [PMID: 37605813 DOI: 10.1111/1346-8138.16929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/13/2023] [Accepted: 08/06/2023] [Indexed: 08/23/2023]
Affiliation(s)
- Ryo Fukaura
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | | | - Mai Ota
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Haruka Noda
- Department of Perinatal Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan
| | - Yuka Ishihara
- Department of Nursing, Sugiyama Jogakuen University, Nagoya, Japan
| | - Keigo Shibayama
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masashi Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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9
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Kinoshita T, Sahara S, Amano T, Ito M, Sakakibara T, Takimoto N, Osada Y, Oka K. First Case Report of Peritoneal Dialysis-associated Peritonitis Caused by Lysinibacillus sphaericus. Intern Med 2023; 62:2919-2922. [PMID: 36823089 PMCID: PMC10602840 DOI: 10.2169/internalmedicine.1141-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/16/2023] [Indexed: 02/23/2023] Open
Abstract
We herein report a case of peritoneal dialysis-associated peritonitis caused by Lysinibacillus sphaericus in a 40s-year-old patient. Treatment was initiated with intermittent intraperitoneal cefazolin and ceftazidime. Later, both peritoneal dialysate and blood cultures detected L. sphaericus, so the antibiotic was changed to ampicillin (ABPC). The patient was treated with a combination of intraperitoneal intermittent and intravenous ABPC for 7 days, followed by 14 days of amoxicillin. The patient experienced no adverse events and no recurrence for 30 days. The patient had four dogs, and the infection was deemed likely to have been caused by environmental contamination and inadequate catheter replacement.
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Affiliation(s)
| | - Shoko Sahara
- Department of Pharmacy, Kariya Toyota General Hospital, Japan
| | - Tomomi Amano
- Department of Clinical Laboratory, Kariya Toyota General Hospital, Japan
| | - Masashi Ito
- Department of Pharmacy, Takahama Toyota Hospital, Japan
| | | | - Norio Takimoto
- Department of Pharmacy, Kariya Toyota General Hospital, Japan
| | - Yukari Osada
- Department of Clinical Laboratory, Nagoya University Hospital, Japan
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Japan
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10
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Kobayashi H, Takeuchi S, Torii Y, Ikenouchi T, Kawada JI, Oka K, Kato S, Ogawa M. Time course of skin rash, computed tomography findings, and viral load in a rheumatoid arthritis patient with severe varicella pneumonia. IDCases 2023; 33:e01866. [PMID: 37559973 PMCID: PMC10407726 DOI: 10.1016/j.idcr.2023.e01866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 08/11/2023] Open
Abstract
Varicella-zoster virus (VZV) infection in adults or immunocompromised patients has a more severe presentation compared to the mild disease in children. To the best of our knowledge, no reports have described the clinical course of VZV pneumonia focusing on time course of skin rash, chest computed tomography (CT) findings, and viral load. Furthermore, no reports have described the reactivation of human herpes virus 6 (HHV-6) in VZV pneumonia. Here, we report a case of severe VZV pneumonia that resulted in reactivation of HHV-6 in a patient with rheumatoid arthritis (RA). A 66-year-old female treated for RA was admitted to our hospital with papules. Her chest CT showed granular infiltrates, micronodules, and ground-glass opacities. The day after admission, because the typical skin rashes and chest CT findings were observed, she was diagnosed with VZV pneumonia and treated with acyclovir. Her skin rash then crusted over five days and entered the healing process, whereas it took approximately two weeks for her respiratory condition and chest CT findings to improve. In addition, VZV deoxyribonucleic acid (DNA) gradually decreased with treatment. On the 34th day of admission, VZV DNA was not found in the serum sample but remained in the sputum sample. Furthermore, although reactivation of HHV-6 was observed, viremia resolved without treatment. Clinicians should be able to recognize the differences in the improvement of skin rashes, respiratory status, and chest CT findings. In addition, treatment for HHV-6 reactivation should be carefully determined for each case.
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Affiliation(s)
- Hironori Kobayashi
- Department of Respiratory Medicine, Handa City Hospital, 2-29 Touyou-cho, Handa-shi, Aichi 475-8599, Japan
| | - Shunta Takeuchi
- Department of Respiratory Medicine, Handa City Hospital, 2-29 Touyou-cho, Handa-shi, Aichi 475-8599, Japan
| | - Yuka Torii
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Tadasuke Ikenouchi
- Department of Respiratory Medicine, Handa City Hospital, 2-29 Touyou-cho, Handa-shi, Aichi 475-8599, Japan
| | - Jun-ichi Kawada
- Department of Pediatrics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Sayaka Kato
- Department of Respiratory Medicine, Handa City Hospital, 2-29 Touyou-cho, Handa-shi, Aichi 475-8599, Japan
| | - Masahiro Ogawa
- Department of Respiratory Medicine, Handa City Hospital, 2-29 Touyou-cho, Handa-shi, Aichi 475-8599, Japan
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11
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Oka K, Sahara S, Kuramae H, Osada Y. Mycobacterium obuense bacteremia: A case report and literature review. Int J Mycobacteriol 2023; 12:357-359. [PMID: 37721244 DOI: 10.4103/ijmy.ijmy_148_23] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023] Open
Abstract
An 84-year-old man visited our hospital with a high fever. He had cut his right index finger 7 days previously. Blood culture became positive on day 3. Gram staining was negative, and acid-fast staining was positive. The organism was subsequently identified as Mycobacterium obuense using a MALDI Biotyper. M. obuense was also detected in the soil at the patient's house, suggesting that it had entered his bloodstream through the cut on his finger. He was treated with a combination of imipenem/cilastatin, amikacin, and clarithromycin for 2 weeks. His clinical condition improved, and he was discharged after 2 weeks and was prescribed clarithromycin and levofloxacin therapy. Only two cases of human infection with M. obuense have been reported previously.
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Affiliation(s)
- Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Japan
| | - Shoko Sahara
- Department of Pharmacy, Kariya Toyota General Hospital, Kariya, Japan
| | - Hitoshi Kuramae
- Department of Safety Environment Management, Kariya Toyota General Hospital, Kariya, Japan
| | - Yukari Osada
- Department of Clinical Laboratory, Nagoya University Hospital, Nagoya, Japan
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12
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Mizuno Y, Shibata S, Miyagaki T, Ito Y, Taira H, Hisamoto T, Oka K, Takahashi-Shishido N, Boki H, Sato S. 501 Serum cell-free DNA as a new biomarker in cutaneous T-cell lymphoma. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.515] [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: 11/19/2022]
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13
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Oka K, Miyagawa T, Suga H, Miyagaki T, Mizuno Y, Hisamoto T, Omori I, Boki H, Takahashi-Shishido N, Sato S. 474 Increased Expression of Squamous Cell Carcinoma Antigen 1 and 2 in Mycosis Fungoides and Sézary Syndrome. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.488] [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: 11/19/2022]
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14
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Hara Y, Iguchi M, Tetsuka N, Morioka H, Hirabayashi A, Suzuki M, Tomita Y, Oka K, Yagi T. <Editors' Choice> Multicenter survey for carbapenemase-producing Enterobacterales in central Japan. Nagoya J Med Sci 2022; 84:630-639. [PMID: 36237878 PMCID: PMC9529634 DOI: 10.18999/nagjms.84.3.630] [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] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/02/2021] [Indexed: 11/20/2022]
Abstract
Carbapenemase-producing Enterobacterales (CPE) raise concerns about the treatment options for infectious diseases and infection control. We conducted a multicenter study to clarify the molecular epidemiology of CPE in the Aichi Prefecture during the first 3-month period from 2015 to 2019. Carbapenemase production was screened using a modified carbapenem inactivation method, and the genotypes of the carbapenemase genes were determined by polymerase chain reaction sequencing. Genetic relatedness was analyzed using multilocus sequence typing (MLST). Twenty-four hospitals participated in this study. Of the 56,494 Enterobacterales strains detected during the study period, 341 (0.6%) that met the susceptibility criteria were analyzed. Sixty-five of the 341 strains were determined to be CPE, with an incidence rate of 0.12% (65/56,494). The bacterial species responsible for CPE were Klebsiella pneumoniae (n = 24), Enterobacter cloacae complex (n = 23), Klebsiella oxytoca (n = 10), and Escherichia coli (n = 8). Most of the carbapenemase genotypes were IMP-1 (58/65), and only three were IMP-6 types. Three E. coli strains that produced NDM-5 were detected. MLST analysis showed that Sequence type (ST) 78 was predominant in E. cloacae complex CPE (14/23, 60.9%). Meanwhile, various STs were detected in carbapenemase-producing (CP) K. pneumoniae, of which ST37 and ST517 were the most common. The incidence rate of CPE in this region was comparable to national data. This 3-month surveillance revealed the spread of ST78 of CP E. cloacae complex and ST517 and ST592 of CP K. pneumoniae across hospitals, indicating the need to strengthen regional infection control programs.
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Affiliation(s)
- Yuki Hara
- Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Japan
,Department of Clinical Laboratory, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Mitsutaka Iguchi
- Department of Infectious diseases, Nagoya University Hospital, Nagoya, Japan
| | - Nobuyuki Tetsuka
- Department of Infection control, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Hiroshi Morioka
- Department of Infectious diseases, Nagoya University Hospital, Nagoya, Japan
| | - Aki Hirabayashi
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masato Suzuki
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Yuka Tomita
- Department of Infection control, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Keisuke Oka
- Department of Infectious diseases, Nagoya University Hospital, Nagoya, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Japan
,Department of Infectious diseases, Nagoya University Hospital, Nagoya, Japan
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15
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Oka K, Matsumoto A, Tetsuka N, Morioka H, Iguchi M, Ishiguro N, Nagamori T, Takahashi S, Saito N, Tokuda K, Igari H, Fujikura Y, Kato H, Kanai S, Kusama F, Iwasaki H, Furuhashi K, Baba H, Nagao M, Nakanishi M, Kasahara K, Kakeya H, Chikumi H, Ohge H, Azuma M, Tauchi H, Shimono N, Hamada Y, Takajo I, Nakata H, Kawamura H, Fujita J, Yagi T. Clinical characteristics and treatment outcomes of carbapenem-resistant Enterobacterales infections in Japan. J Glob Antimicrob Resist 2022; 29:247-252. [PMID: 35429667 DOI: 10.1016/j.jgar.2022.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES The dissemination of difficult-to-treat carbapenem-resistant Enterobacterales (CRE) is of great concern. We clarified the risk factors underlying CRE infection mortality in Japan. METHODS We conducted a retrospective, multicentre, observational cohort study of patients with CRE infections at 28 university hospitals from September 2014 to December 2016, using the Japanese National Surveillance criteria. Clinical information, including patient background, type of infection, antibiotic treatment, and treatment outcome, was collected. The carbapenemase genotype was determined using PCR sequencing. Multivariate analysis was performed to identify the risk factors for 28-day mortality. RESULTS Among the 179 patients enrolled, 65 patients (36.3%) had bloodstream infections, with 37 (20.7%) infections occurring due to carbapenemase-producing Enterobacterales (CPE); all carbapenemases were of IMP-type (IMP-1: 32, IMP-6: 5). Two-thirds of CPE were identified as Enterobacter cloacae complex. Combination therapy was administered only in 46 patients (25.7%), and the 28-day mortality rate was 14.3%. Univariate analysis showed that solid metastatic cancer, Charlson Comorbidity Index ≥3, bloodstream infection, pneumonia, or empyema, central venous catheters, mechanical ventilation, and prior use of quinolones were significant risk factors for mortality. Multivariate analysis revealed that mechanical ventilation (OR: 6.71 [1.42-31.6], P = 0.016), solid metastatic cancers (OR: 5.63 [1.38-23.0], P = 0.016), and bloodstream infections (OR: 3.49 [1.02-12.0], P = 0.046) were independent risk factors for 28-day mortality. CONCLUSION The significant risk factors for 28-day mortality in patients with CRE infections in Japan are mechanical ventilation, solid metastatic cancers, and bloodstream infections.
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Affiliation(s)
- Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Akane Matsumoto
- Department of Pediatrics, Kyoto Katsura Hospital, Saikyou-ku, Kyoto, Japan
| | - Nobuyuki Tetsuka
- Department of Infection Control, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Hiroshi Morioka
- Department of Infectious Diseases, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Mitsutaka Iguchi
- Department of Infectious Diseases, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Nobuhisa Ishiguro
- Division of Infection Control, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Tsunehisa Nagamori
- Department of Infection Control, Asahikawa Medical University Hospital, Asahikawa, Hokkaido, Japan
| | - Satoshi Takahashi
- Department of Infection Control and Laboratory Medicine, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Norihiro Saito
- Department of Clinical Laboratory Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - Koichi Tokuda
- Department of Infection Control and Laboratory Diagnostics, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hidetoshi Igari
- Division of Infection Control, Chiba University Hospital, Chiba, Chiba, Japan
| | - Yuji Fujikura
- Division of Infectious Diseases and Respiratory Medicine, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Yokohama, Kanagawa, Japan
| | - Shinichiro Kanai
- Department of Infection Control, Shinshu University Hospital, Matsumoto, Nagano, Japan
| | - Fumiko Kusama
- Department of Clinical Laboratory, Niigata University Medical and Dental Hospital, Niigata, Niigata, Japan
| | - Hiromichi Iwasaki
- Department of Infection Control and Prevention, University of Fukui, Fukui, Fukui, Japan
| | - Kazuki Furuhashi
- Department of Laboratory Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Hisashi Baba
- Centre for Nutrition Support and Infection Control, Gifu University Hospital, Gifu, Gifu, Japan
| | - Miki Nagao
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
| | - Masaki Nakanishi
- Department of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Kyoto, Japan
| | - Kei Kasahara
- Centre for Infectious Diseases, Nara Medical University, Kashihara, Nara, Japan
| | - Hiroshi Kakeya
- Department of Infection Control Science, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Osaka, Japan
| | - Hiroki Chikumi
- Centre for Infectious Diseases, Tottori University Hospital, Yonago, Tottori, Japan
| | - Hiroki Ohge
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Hiroshima, Japan
| | - Momoyo Azuma
- Department of Infection Control, Tokushima University Hospital, Tokushima, Tokushima, Japan
| | - Hisamichi Tauchi
- Division of Infectious Disease, Control and Prevention, Ehime University Hospital, Toon, Ehime, Japan
| | - Nobuyuki Shimono
- Centre for the Study of Global Infection, Kyushu University Hospital, Fukuoka, Fukuoka, Japan
| | - Yohei Hamada
- Department of Infectious Disease and Hospital Epidemiology, Saga University Hospital, Saga, Saga, Japan
| | - Ichiro Takajo
- Center for Infection Control, Miyazaki University Hospital, Miyazaki, Miyazaki, Japan
| | - Hirotomo Nakata
- Department of Infection Control, Kumamoto University Hospital, Kumamoto, Kumamoto, Japan
| | - Hideki Kawamura
- Department of Infection Control, Kagoshima University Hospital, Kagoshima, Kagoshima, Japan
| | - Jiro Fujita
- Department of Infectious, Respiratory, and Digestive Medicine, Graduate School of Medicine, University of the Ryukyus, Nakagami-gun, Okinawa, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Showa-ku, Nagoya, Aichi, Japan.
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16
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Oka K, Tetsuka N, Morioka H, Iguchi M, Kawamura K, Hayashi K, Yanagiya T, Morokuma Y, Watari T, Kiyosuke M, Yagi T. Genetic and epidemiological analysis of ESBL-producing Klebsiella pneumoniae in three Japanese university hospitals. J Infect Chemother 2022; 28:1286-1294. [PMID: 35659435 DOI: 10.1016/j.jiac.2022.05.013] [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] [Received: 03/03/2022] [Revised: 04/28/2022] [Accepted: 05/23/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION We aimed to clarify the genetic background and molecular epidemiology of extended-spectrum beta-lactamase (ESBL)-producing Klebsiella pneumoniae (K. pneumoniae) at three geographically separated university hospitals in Japan. METHODS From January 2014 to December 2016, 118 ESBL-producing K. pneumoniae (EPKP) strains that were detected and stored at three university hospitals were collected. Molecular epidemiological analysis was performed using enterobacterial repetitive intergenic consensus (ERIC)-polymerase chain reaction (PCR) and multi-locus sequence typing (MLST). The ESBL type was determined using the PCR-sequence method. The presence of plasmid-mediated fluoroquinolone resistance (PMQR) genes was analyzed by PCR. We compared the relationships between PMQR gene possession/quinolone resistance-determining region (QRDR) mutation and levofloxacin (LVFX)/ciprofloxacin (CPFX) susceptibility. RESULTS The detection rate of EPKP was 4.8% (144/2987 patients). MLST analysis revealed 62 distinct sequence types (STs). The distribution of STs was diverse, and only some EPKP strains had the same STs. ERIC-PCR showed discriminatory power similar to that of MLST. The major ESBL genotypes were CTX-M-15-, CTX-M-14-, and SHV-types, which were detected in 47, 30, and 27 strains, respectively. Ninety-one out of 118 strains had PMQR genes and 14 out of 65 strains which were not susceptible to CPFX had QRDR mutations, and the accumulation of PMQR genes and QRDR mutations tended to lead to higher minimum inhibitory concentrations (MICs) of LVFX. CONCLUSIONS At three geographically separated university hospitals in Japan, the epidemiology of EPKP was quite diverse, and no epidemic strains were found, whereas CTX-M-14 and CTX-M-15 were predominant.
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Affiliation(s)
- Keisuke Oka
- Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Aichi, 466-8560, Japan; Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, 466-8560, Japan
| | - Nobuyuki Tetsuka
- Department of Infection Control, Gifu University Graduate School of Medicine, Gifu, Gifu, 501-1112, Japan
| | - Hiroshi Morioka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, 466-8560, Japan
| | - Mitsutaka Iguchi
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, 466-8560, Japan
| | - Kazumitsu Kawamura
- Department of Medical Technique, Clinical Laboratory, Nagoya University Hospital, Nagoya, Aichi, 466-8560, Japan
| | - Kengo Hayashi
- Department of Microbiology, Fujita Health University School of Medicine, Toyoake, Aichi, 470-1192, Japan
| | - Takako Yanagiya
- Department of Medical Laboratory and Blood Center, Asahikawa Medical University Hospital, Asahikawa, Hokkaido, 078-8510, Japan
| | - Yuiko Morokuma
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Hospital, Fukuoka, Fukuoka, 812-8582, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, 296-8602, Japan
| | - Makiko Kiyosuke
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Hospital, Fukuoka, Fukuoka, 812-8582, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Aichi, 466-8560, Japan; Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, 466-8560, Japan. http://
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17
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Tetsuka N, Muramatsu H, Iguchi M, Oka K, Morioka H, Takahashi Y, Yagi T. Difficulties in diagnosing Malassezia furfur bloodstream infection and possibility of spontaneous resolution in a patient undergoing chemotherapy for neuroblastoma: A case report. J Infect Chemother 2022; 28:987-990. [DOI: 10.1016/j.jiac.2022.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 02/17/2022] [Accepted: 02/27/2022] [Indexed: 11/30/2022]
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18
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Kinoshita T, Sahara S, Mihara Y, Asai Y, Sato H, Sakakibara T, Takimoto N, Oka K. A case of acute focal bacterial nephritis caused by methicillin-resistant Staphylococcus saprophyticus in a 13-year-old adolescent girl treated with daptomycin. IDCases 2022; 29:e01594. [PMID: 35966278 PMCID: PMC9372729 DOI: 10.1016/j.idcr.2022.e01594] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 11/18/2022] Open
Abstract
Staphylococcus saprophyticus is a gram-positive, coagulase-negative member of the Staphylococcus genus and is second only to Escherichia coli as a cause of urinary tract infections in the young female population. S. saprophyticus usually has good susceptibility to drugs commonly used to treat urinary tract infections, but it is often methicillin-resistant. Here we report a case of acute focal bacterial nephritis in a 13-year-old female patient caused by methicillin-resistant S. saprophyticus and treated with daptomycin (DAP). The patient had a history of unilateral hearing loss and presented to her previous physician with a 3-day history of fever, right-sided abdominal pain, and diarrhea. Cefotaxime antimicrobial chemotherapy was initiated as an empiric therapy targeting E. coli, the most frequent cause of community-onset pyelonephritis. Vancomycin (VCM) was started for acute focal bacterial nephritis caused by methicillin-resistant S. saprophyticus but was stopped due to allergy and replaced with DAP. After 13 days of treatment with DAP, the patient received 17 days of treatment with sulfamethoxazole-trimethoprim combination therapy. The patient experienced no adverse events and did not relapse. DAP is a relatively new anti-methicillin-resistant Staphylococcus aureus drug used to treat gram-positive cocci infections. It is primarily excreted by the kidneys, which may be desirable in treating urinary tract infections. For children who cannot receive VCM for any reason, DAP may be a viable alternative. S. saprophyticus is a common cause of urinary tract infections in young women. The use of daptomycin for urinary tract infections in children is rare. Vancomycin (VCM) is usually used to treat methicillin-resistant S. saprophyticus. If VCM is unavailable, daptomycin can used to treat urinary tract infections in such cases.
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Affiliation(s)
- Teruhisa Kinoshita
- Department of Pharmacy, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
- Corresponding author.
| | - Shoko Sahara
- Department of Pharmacy, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
| | - Yuka Mihara
- Department of Pediatrics, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
| | - Yumiko Asai
- Department of Pediatrics, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
| | - Hiroko Sato
- Department of Pharmacy, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
| | - Takashi Sakakibara
- Department of Pharmacy, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
| | - Norio Takimoto
- Department of Pharmacy, Kariya Toyota General Hospital, 5-15, Sumiyoshi-cho, Kariya-city, Aichi Prefecture 448-8505, Japan
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, 65, Tsurumai-cho, Showa-ku, Nagoya-City, Aichi Prefecture 466-8560, Japan
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Morioka H, Oka K, Yamada Y, Nakane Y, Komiya H, Murase C, Iguchi M, Yagi T. Lysinibacillus fusiformis bacteremia: Case report and literature review. J Infect Chemother 2021; 28:315-318. [PMID: 34865964 DOI: 10.1016/j.jiac.2021.10.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 10/14/2021] [Accepted: 10/29/2021] [Indexed: 11/17/2022]
Abstract
A 93-year-old woman was diagnosed with Lysinibacillus fusiformis bacteremia complicated with coma blisters. Initial gram staining for L. fusiformis indicated the presence of gram-negative rods; however, subsequent staining of colonies from Mueller-Hinton agar revealed the presence of gram-positive and gram-negative rods with spherical endospores, and Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (VITEK ® MS and microflex® LT/SH) definitively identified the organism as L. fusiformis. The two-week administration of piperacillin/tazobactam and ampicillin resulted in an improvement of the patient's general condition, and the skin lesions gradually improved.
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Affiliation(s)
- Hiroshi Morioka
- Department of Infectious Diseases, Nagoya University Hospital, Japan.
| | - Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Japan
| | - Yosuke Yamada
- Department of Community Healthcare and Geriatrics, Nagoya University Graduate School of Medicine, Japan
| | - Yoshimasa Nakane
- Department of Dermatology, Nagoya University Graduate School of Medicine, Japan; Department of Dermatology, Toyohashi Municipal Hospital, Japan
| | - Hitoshi Komiya
- Department of Community Healthcare and Geriatrics, Nagoya University Graduate School of Medicine, Japan
| | - Chiaki Murase
- Department of Dermatology, Nagoya University Graduate School of Medicine, Japan
| | - Mitsutaka Iguchi
- Department of Infectious Diseases, Nagoya University Hospital, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Japan
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20
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Oka K, Morioka H, Eguchi M, Sato Y, Tetsuka N, Iguchi M, Kanematsu T, Fukano H, Hoshino Y, Kiyoi H, Yagi T. Bursitis, Bacteremia, and Disseminated Infection of Mycobacteroides (Mycobacterium) abscessus subsp. massiliense. Intern Med 2021; 60:3041-3045. [PMID: 33775997 PMCID: PMC8502645 DOI: 10.2169/internalmedicine.6189-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We herein report a 59-year-old woman with a 2-year history of chronic bursitis of the hand who took 50 mg/day prednisolone for several autoimmune diseases. Mycobacteroides abscessus subsp. massiliense was isolated from the abscess and blood culture. Combination therapy (imipenem/cilastatin, amikacin, and clarithromycin) was administered for a month. Two months later, M. massiliense was detected from a blood culture again, and disseminated lesions were found. Clarithromycin and sitafloxacin were administered following eight weeks of the same regimen. Six months after the diagnosis, M. massiliense was isolated from a blood culture, and she expired due to multiple organ failure.
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Affiliation(s)
- Keisuke Oka
- Department of Infectious Diseases, Nagoya University Hospital, Japan
| | - Hiroshi Morioka
- Department of Infectious Diseases, Nagoya University Hospital, Japan
| | - Motoki Eguchi
- Department of Hematology, Japanese Red Cross Nagoya First Hospital, Japan
| | - Yoshitaka Sato
- Department of Infectious Diseases, Nagoya University Hospital, Japan
- Department of Virology, Nagoya University Graduate School of Medicine, Japan
| | - Nobuyuki Tetsuka
- Department of Infectious Diseases, Nagoya University Hospital, Japan
| | - Mitsutaka Iguchi
- Department of Infectious Diseases, Nagoya University Hospital, Japan
| | - Takeshi Kanematsu
- Department of Clinical Laboratory, Nagoya University Hospital, Japan
| | - Hanako Fukano
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, Japan
| | - Yoshihiko Hoshino
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, Japan
| | - Hitoshi Kiyoi
- Department of Hematology, Nagoya University Hospital, Japan
| | - Tetsuya Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Japan
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21
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Affiliation(s)
- T Sugiyama
- Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Australia.,Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia.,Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.,Centre for Urban Transitions, Swinburne University of Technology, John Street, Hawthorne, VIC 3122, Australia
| | - M J Koohsari
- Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.,Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan.,Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - K Oka
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
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22
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Ito N, Zen K, Kadoya Y, Kuwabara K, Yamano M, Yamano T, Nakamura T, Numata S, Sakai O, Oka K, Yaku H, Matoba S. P932Structural changes in left ventricle after transcatheter aortic valve implantation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0527] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Transcatheter aortic valve implantation (TAVI) has improved prognosis and quality of life of patients with severe aortic stenosis (AS) who had been considered inoperable or at high risk for surgical aortic valve replacement reflecting their age, frailty, and comorbidities. However, less is known about changes in cardiac geometry after TAVI procedure, and predictors of them.
Purpose
To clarify changes in cardiac geometry after TAVI, and their predictors.
Methods
We retrospectively analyzed patients with severe AS who underwent TAVI in our institute between May 2016 and June 2018. Of the 117 consecutive patients enrolled to this study, 12 patients died before six-month follow up, and finally 88 patients received follow up exams including echocardiography at six months after TAVI procedure.
Results
The analysis of echocardiographic data at the baseline and the six-month follow up of the 88 patients (age 86.2±4.0 years, male 19.3%, STS-PROM 6.76±3.28%, peak aortic jet velocity 4.67±0.75m/s) revealed that left ventricular end-diastolic volume index (LVEDVi) (from 80.1±20.9ml/m2to 74.2±15.9ml/m2, p=0.011), and left ventricular mass index (LVMi) (from 116.0±32.7g/m2to 93.6±25.6g/m2, p<0.001) had improved in six months after TAVI procedure. The difference of LVEDVi (ΔLVEDVi: six-month LVEDVi–baseline LVEDVi) and the difference of LVMi (ΔLVMi: six-month LVMi – baseline LVMi) were significantly higher in the patients with chronic atrial fibrillation compared to the rest (ΔLVEDVi: +7.7±8.7ml/m2 vs −7.2±18.1ml/m2, p=0.024; ΔLVMi: +7.1±11.5g/m2 vs −25.3±33.5g/m2, p=0.008). In echocardiographic data, ΔLVEDVi and ΔLVMi both had positive correlation between baseline E/e' ratio (ΔLVEDVi: r=0.224, p=0.048; ΔLVMi: r=0.240, p=0.034), and negative correlation between baseline LVEDVi (ΔLVEDVi: r=−0.674, p<0.001; ΔLVMi: r=−0.312, p=0.003), LVMi (ΔLVEDVi: r=−0.422, p<0.001; ΔLVMi: r=−0.699, p<0.001), peak aortic jet velocity (ΔLVEDVi: r=−0.257, p=0.016; ΔLVMi: r=−0.376, p<0.001), and mean transaortic pressure gradient (ΔLVEDVi: r=−0.269, p=0.011; ΔLVMi: r=−0.403, p<0.001).
Conclusion
TAVI resulted in reverse remodeling and regression of hypertrophy in left ventricle. And these improvement were grater in patients with more advanced left ventricular remodeling and hypertrophy, and higher severity of AS at the baseline, however, less in patients with chronic atrial fibrillation and worse diastolic dysfunction.
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Affiliation(s)
- N Ito
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - K Zen
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Y Kadoya
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - K Kuwabara
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Yamano
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Yamano
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Nakamura
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - S Numata
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - O Sakai
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - K Oka
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - H Yaku
- Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - S Matoba
- Kyoto Prefectural University of Medicine, Kyoto, Japan
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23
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Kosaki K, Tanahashi K, Matsui M, Akazawa N, Osuka Y, Tanaka K, Dunstan D, Owen N, Shibata A, Oka K, Maeda S. Objectively assessed sedentary behavior, physical activity, and renal function in middle-aged and older Japanese adults. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Miyamura S, Oka K, Sakai T, Tanaka H, Shiode R, Shimada S, Mae T, Sugamoto K, Yoshikawa H, Murase T. Cartilage wear patterns in severe osteoarthritis of the trapeziometacarpal joint: a quantitative analysis. Osteoarthritis Cartilage 2019; 27:1152-1162. [PMID: 30954554 DOI: 10.1016/j.joca.2019.03.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/12/2019] [Accepted: 03/27/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The present quantitative study aimed to assess the three-dimensional (3-D) cartilage wear patterns of the first metacarpal and trapezium in the advanced stage of osteoarthritis (OA) and compare cartilage measurements with radiographic severity. DESIGN Using 19 cadaveric trapeziometacarpal (TMC) joints, 3-D cartilage surface models of the first metacarpal and trapezium were created with a laser scanner, and 3-D bone surface model counterparts were similarly created after dissolving the cartilage. These two models were superimposed, and the interval distance on the articular surface as the cartilage thickness was measured. All measurements were obtained in categorized anatomic regions on the articular surface of the respective bone, and we analyzed the 3-D wear patterns on the entire cartilage surface. Furthermore, we compared measurements of cartilage thickness with radiographic OA severity according to the Eaton grading system using Pearson correlation coefficients (r). RESULTS In the first metacarpal, the cartilage thickness declined volarly (the mean cartilage thickness of the volar region was 0.32 ± 0.16 mm, whereas that of the dorsal region was 0.53 ± 0.18 mm). Conversely, the cartilage evenly degenerated throughout the articular surface of the trapezium. Measurements of the categorized regions where cartilage thinning was remarkable exhibited statistical correlations with radiographic staging (r = -0.48 to -0.72). CONCLUSIONS Our findings indicate that cartilage wear patterns differ between the first metacarpal and trapezium in the late stage of OA. There is a need for further studies on cartilage degeneration leading to symptomatic OA in the TMC joint.
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Affiliation(s)
- S Miyamura
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - K Oka
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - T Sakai
- Department of Orthopaedic Surgery, Yamaguchi University, Graduate School of Medicine, 1-1-1, Minamikogushi, Ube 755-8505, Japan.
| | - H Tanaka
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - R Shiode
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - S Shimada
- Department of Neuroscience and Cell Biology, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - T Mae
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - K Sugamoto
- Department of Orthopaedic Biomaterial Science, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - H Yoshikawa
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - T Murase
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
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25
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Tetsuka N, Hirabayashi A, Matsumoto A, Oka K, Hara Y, Morioka H, Iguchi M, Tomita Y, Suzuki M, Shibayama K, Yagi T. Molecular epidemiological analysis and risk factors for acquisition of carbapenemase-producing Enterobacter cloacae complex in a Japanese university hospital. Antimicrob Resist Infect Control 2019; 8:126. [PMID: 31367347 PMCID: PMC6657070 DOI: 10.1186/s13756-019-0578-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/15/2019] [Indexed: 12/25/2022] Open
Abstract
Background To clarify the molecular epidemiology of carbapenem-resistant Enterobacter cloacae complex (CREC) and the risk factors for acquisition of carbapenemase-producing E. cloacae complex (CPEC). Methods Using clinical CREC isolates detected in a Japanese university hospital over 4 years, carbapenemase production was screened with phenotypic methods. Carbapenemase genes were analysed by PCR and sequencing. Molecular epidemiological analyses were conducted with repetitive extragenic palindromic (REP)-PCR and multilocus sequence typing (MLST). CRECs were identified to the subspecies level by hsp60 sequencing. Whole-genome sequencing of plasmids was conducted. A case-control study was performed to identify risk factors for acquisition of CPEC among patients with CREC. Results Thirty-nine CRECs including 20 CPECs carrying bla IMP-1 were identified. Patients with CPEC had longer hospital stay before detection (26.5 days vs. 12 days, p = 0.008), a urinary catheter (odds ratio [OR], 5.36; 95% confidence interval [CI], 1.14-30.9; p = 0.023), or intubation (OR, 7.53; 95% CI, 1.47-53.8; p = 0.008) compared to patients without CPEC. Four genetically closely related CPEC clusters were observed, which showed that three of four CPEC clusters corresponded to E. asburiae (ST 53), E. hormaechei subsp. steigerwaltii (ST 113 and ST 1047) and E. cloacae subsp. cloacae (ST 513) by MLST and hsp60 sequencing. Seven representative plasmids shared structures with class I integron containing bla IMP-1 and IncHI2A replicon type. Conclusions A longer hospital stay, presence of a urinary catheter, and intubation are risk factors for CPEC acquisition. In addition to horizontal transmission of genetically indistinguishable CPECs, IncHI2A plasmid carrying bla IMP-1 appeared to be transferred among genetically different ECs.
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Affiliation(s)
- Nobuyuki Tetsuka
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan.,2Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Aichi Japan
| | - Aki Hirabayashi
- 3Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Akane Matsumoto
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan
| | - Keisuke Oka
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan.,2Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Aichi Japan
| | - Yuki Hara
- 2Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Aichi Japan.,4Japanese Red Cross Nagoya Daini Hospital, Nagoya, Aichi Japan
| | - Hiroshi Morioka
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan
| | - Mitsutaka Iguchi
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan
| | - Yuka Tomita
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan
| | - Masato Suzuki
- 3Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Keigo Shibayama
- 5Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tetsuya Yagi
- 1Department of Infectious Diseases, Nagoya University Hospital, 65 Tsurumai, Nagoya, Aichi 466-0065 Japan.,2Department of Infectious Diseases, Nagoya University Graduate School of Medicine, Nagoya, Aichi Japan
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26
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Kadoya Y, Zen K, Tamaki N, Ito N, Kuwabara K, Yamano M, Yamano T, Nakamura T, Sakai O, Oka K, Yaku H, Matoba S. 192Early effect of transcatheter aortic valve implantation on cardiac sympathetic nervous function assessed by 123i-metaiodobenzylguanidine scintigraphy in patients with severe aortic stenosis. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez144.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Kadoya
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - K Zen
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - N Tamaki
- Kyoto Prefectural University of Medicine, Department of Radiology, Kyoto, Japan
| | - N Ito
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - K Kuwabara
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - M Yamano
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - T Yamano
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - T Nakamura
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - O Sakai
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Surgery, Kyoto, Japan
| | - K Oka
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Surgery, Kyoto, Japan
| | - H Yaku
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Surgery, Kyoto, Japan
| | - S Matoba
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
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27
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Abstract
An active recording x-ray crystal spectrometer for extended x-ray absorption fine structure (EXAFS) has been built using a position sensitive detector of the self scanning photodiode array (SSPA) type. The SSPA detector has energy and position sensitivity for x-rays. The spectrometer was applied to the measurement for EXAFS of the several compounds in foil, powder and liquid states. The spectra can be obtained rapidly, and compare very well with other methods. We found that the SSPA detector is very useful for the measurement of EXAFS.
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Miyamoto T, Matsui Y, Terashige T, Morimoto T, Sono N, Yada H, Ishihara S, Watanabe Y, Adachi S, Ito T, Oka K, Sawa A, Okamoto H. Probing ultrafast spin-relaxation and precession dynamics in a cuprate Mott insulator with seven-femtosecond optical pulses. Nat Commun 2018; 9:3948. [PMID: 30258055 PMCID: PMC6158258 DOI: 10.1038/s41467-018-06312-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 08/23/2018] [Indexed: 11/18/2022] Open
Abstract
A charge excitation in a two-dimensional Mott insulator is strongly coupled with the surrounding spins, which is observed as magnetic-polaron formations of doped carriers and a magnon sideband in the Mott-gap transition spectrum. However, the dynamics related to the spin sector are difficult to measure. Here, we show that pump-probe reflection spectroscopy with seven-femtosecond laser pulses can detect the optically induced spin dynamics in Nd2CuO4, a typical cuprate Mott insulator. The bleaching signal at the Mott-gap transition is enhanced at ~18 fs. This time constant is attributable to the spin-relaxation time during magnetic-polaron formation, which is characterized by the exchange interaction. More importantly, ultrafast coherent oscillations appear in the time evolution of the reflectivity changes, and their frequencies (1400-2700 cm-1) are equal to the probe energy measured from the Mott-gap transition peak. These oscillations can be interpreted as the interference between charge excitations with two magnons originating from charge-spin coupling.
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Affiliation(s)
- T Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - Y Matsui
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - T Terashige
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Chiba, 277-8568, Japan
| | - T Morimoto
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - N Sono
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - H Yada
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - S Ishihara
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan
| | - Y Watanabe
- Department of Chemistry, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - S Adachi
- Department of Chemistry, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - T Ito
- National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan
| | - K Oka
- National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan
| | - A Sawa
- National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan
| | - H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan.
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Chiba, 277-8568, Japan.
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Abe S, Noguchi N, Matsuka Y, Shinohara C, Kimura T, Oka K, Okura K, Rodis OMM, Kawano F. Educational effects using a robot patient simulation system for development of clinical attitude. Eur J Dent Educ 2018; 22:e327-e336. [PMID: 29091328 DOI: 10.1111/eje.12298] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION The aim of this study was to assess the effectiveness of improving the attitude of dental students towards the use of a full-body patient simulation system (SIMROID) compared to the traditional mannequin (CLINSIM) for dental clinical education. MATERIALS AND METHODS The participants were 10 male undergraduate dental students who had finished clinical training in the university hospital 1 year before this study started. They performed a crown preparation on an upper pre-molar tooth using SIMROID and CLINSIM as the practical clinical trials. The elapsed time for preparation was recorded. The taper of the abutment teeth was measured using a 3-dimensional shape-measuring device after this trial. In addition, a self-reported questionnaire was collected that included physical pain, treatment safety and maintaining a clean area for each simulator. Qualitative data analysis of a free format report about SIMROID was performed using text mining analysis. This trial was performed twice at 1-month intervals. RESULTS The students considered physical pain, treatment safety and a clean area for SIMROID significantly better than that for CLINSIM (P < .01). The elapsed time of preparation in the second practical clinical trial was significantly lower than in the first for SIMROID and CLINSIM (P < .01). However, there were no significant differences between the abutment tapers for both systems. For the text mining analysis, most of the students wrote that SIMROID was similar to real patients. CONCLUSION The use of SIMROID was proven to be effective in improving the attitude of students towards patients, thereby giving importance to considerations for actual patients during dental treatment.
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Affiliation(s)
- S Abe
- Department of Comprehensive Dentistry, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - N Noguchi
- Division of Oral Care and Clinical Education, Tokushima University Hospital, Tokushima, Japan
| | - Y Matsuka
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - C Shinohara
- Department of Comprehensive Dentistry, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - T Kimura
- Division of Oral Care and Clinical Education, Tokushima University Hospital, Tokushima, Japan
| | - K Oka
- Division of Oral Care and Clinical Education, Tokushima University Hospital, Tokushima, Japan
| | - K Okura
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - O M M Rodis
- School of Oral Health and Welfare, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - F Kawano
- Department of Comprehensive Dentistry, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
- Division of Oral Care and Clinical Education, Tokushima University Hospital, Tokushima, Japan
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30
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Miyamura S, Oka K, Abe S, Shigi A, Tanaka H, Sugamoto K, Yoshikawa H, Murase T. Altered bone density and stress distribution patterns in long-standing cubitus varus deformity and their effect during early osteoarthritis of the elbow. Osteoarthritis Cartilage 2018; 26:72-83. [PMID: 29037846 DOI: 10.1016/j.joca.2017.10.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 08/29/2017] [Accepted: 10/03/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To quantify the bone density and stress distribution patterns in long-standing cubitus varus and clarify the effects of the deformity on bone density. DESIGN We created three-dimensional computed tomography (CT) elbow models from 21 patients with long-standing cubitus varus deformities without advanced osteoarthritis (OA) and assessed the deformity by superimposing the affected humerus onto a mirror-image of the contralateral normal. Elbows were divided into 13 regions before measuring the bone density of each region and comparing the percentage of high-density volume (%HDV) between affected and normal sides. We constructed finite element models and quantitatively analyzed stress distribution. RESULTS Average degrees of deformities were 20.1° of varus, 6.4° of extension, and 12.7° of internal rotation. The medial side of the affected humerus and ulna, Anteromedial trochlea (P < 0.001), Medial coronoid (P = 0.004), and Medial olecranon (P = 0.049) had significantly higher %HDVs than their normal counterparts. Conversely, %HDVs on the affected lateral side, Capitellum (P < 0.001), Anterolateral trochlea (P = 0.010), Posterolateral trochlea (P < 0.001), Lateral coronoid (P = 0.007), and Lateral olecranon (P < 0.001) were significantly lower than the normal side. The affected radial head %HDVs at Anterolateral and Posteromedial quadrants were high (P = 0.007) and low (P = 0.007), respectively. The bone density distribution coincided with stress distribution patterns revealed by finite element analysis (FEA), except in the lateral region influenced by forearm rotation. CONCLUSIONS Repetitive stress on the medial elbow may alter bone density distribution patterns, probably presenting from early stage of OA.
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Affiliation(s)
- S Miyamura
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - K Oka
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan; Osaka University Healthcare Center, 17-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| | - S Abe
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - A Shigi
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - H Tanaka
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - K Sugamoto
- Department of Orthopaedic Biomaterial Science, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - H Yoshikawa
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - T Murase
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.
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31
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Okamoto N, Hosono A, Shibata K, Tsujimura S, Oka K, Fujita H, Kamiya M, Kondo F, Wakabayashi R, Yamada T, Suzuki S. Accuracy of self-reported height, weight and waist circumference in a Japanese sample. Obes Sci Pract 2017; 3:417-424. [PMID: 29259800 PMCID: PMC5729501 DOI: 10.1002/osp4.122] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 06/28/2017] [Accepted: 07/10/2017] [Indexed: 11/15/2022] Open
Abstract
Objective Inconsistent results have been found in prior studies investigating the accuracy of self‐reported waist circumference, and no study has investigated the validity of self‐reported waist circumference among Japanese individuals. This study used the diagnostic standard of metabolic syndrome to assess the accuracy of individual's self‐reported height, weight and waist circumference in a Japanese sample. Methods Study participants included 7,443 Japanese men and women aged 35–79 years. They participated in a cohort study's baseline survey between 2007 and 2011. Participants' height, weight and waist circumference were measured, and their body mass index was calculated. Self‐reported values were collected through a questionnaire before the examination. Results Strong correlations between measured and self‐reported values for height, weight and body mass index were detected. The correlation was lowest for waist circumference (men, 0.87; women, 0.73). Men significantly overestimated their waist circumference (mean difference, 0.8 cm), whereas women significantly underestimated theirs (mean difference, 5.1 cm). The sensitivity of self‐reported waist circumference using the cut‐off value of metabolic syndrome was 0.83 for men and 0.57 for women. Conclusions Due to systematic and random errors, the accuracy of self‐reported waist circumference was low. Therefore, waist circumference should be measured without relying on self‐reported values, particularly in the case of women.
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Affiliation(s)
- N Okamoto
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - A Hosono
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - K Shibata
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan.,Aichi Gakusen University Okazaki Japan
| | - S Tsujimura
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - K Oka
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - H Fujita
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - M Kamiya
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - F Kondo
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - R Wakabayashi
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
| | - T Yamada
- Okazaki City Medical Association, Public Health Center Okazaki Japan
| | - S Suzuki
- Department of Public Health Nagoya City University Graduate School of Medical Sciences Nagoya Japan
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Kawada K, Taira N, Hatono M, Takahashi Y, Miyoshi Y, Nogami T, Iwamoto T, Motoki T, Sien T, Matsuoka J, Doihara H, Ikeda M, Ogasawara Y, Takabatake D, Yoshitomi S, Kiyoto S, Yamamoto S, Mizota Y, Oka K. Abstract OT3-07-02: Influence of exercise or educational programs on long-term physical activity by patients after surgery for primary breast cancer: A randomized trial. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-ot3-07-02] [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: 11/16/2022]
Abstract
Abstract
[Background]
Past studies revealed that a moderate to high level of physical activity after diagnosis of breast cancer reduces both the risk of breast cancer-related death and death from all causes. Furthermore, some randomized studies suggested that exercise programs improve the percentage of patients who complete the chemotherapy and quality of life, and decrease fatigue, and adverse events. The issues to be determined include defining an established uniform exercise program and the efficacy of a long-term exercise program after breast cancer surgery.
[Object] To elucidate the efficacy of a long-term exercise program and to verify the safety and feasibility of a uniform exercise program using an ‘existing social resource’ after primary therapy of breast cancer.
[Design] A multi-center, randomized trial.
[Method] Subjects: The subjects included patients who had completed treatment for primary breast cancer, including surgery and/or adjuvant chemotherapy. Patients with metastatic breast cancer were excluded.
Randomization & intervention: The patients were randomly assigned to three groups.
The first group followed an exercise program at Curves® that involved 30 minutes of exercise, including aerobics, weight training, and stretching 3 times a week for 4 months. The second group was given life-style guidance at least once that patients participate in a lecture program about recommended exercise at this point and the importance of weight control after diagnosis of breast cancer using a brochure. The third group served as controls that the patients receive a brochure used same one in the second group. The variables included age and weight.
Outcome: The primary endpoint is level of physical activity at 1 year after randomization, and the secondary endpoints are the percentage of those completing the exercise program, patient reported outcomes (QOL, cancer or treatment associated symptoms, fatigue, depression, and anxiety), body mass index, bone density, and level of lymphedema.
Period of research: The study will last 2 years beginning March 2016.
Sample size: We plan to enroll 400 patients to detect 20% difference with 90% power.
Additional study: Some biochemical markers in the blood will be evaluated to determine the mechanism of the effect of exercise on the human body.
Citation Format: Kawada K, Taira N, Hatono M, Takahashi Y, Miyoshi Y, Nogami T, Iwamoto T, Motoki T, Sien T, Matsuoka J, Doihara H, Ikeda M, Ogasawara Y, Takabatake D, Yoshitomi S, Kiyoto S, Yamamoto S, Mizota Y, Oka K. Influence of exercise or educational programs on long-term physical activity by patients after surgery for primary breast cancer: A randomized trial [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr OT3-07-02.
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Affiliation(s)
- K Kawada
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - N Taira
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - M Hatono
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Y Takahashi
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Y Miyoshi
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - T Nogami
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - T Iwamoto
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - T Motoki
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - T Sien
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - J Matsuoka
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - H Doihara
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - M Ikeda
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Y Ogasawara
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - D Takabatake
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - S Yoshitomi
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - S Kiyoto
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - S Yamamoto
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - Y Mizota
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
| | - K Oka
- Okayama University Hospital, Okayama, Japan; Fukuyama City Hospital, Fukuyama, Hiroshima, Japan; Kagawa Prefectural Central Hospital, Takamatsu, Kagawa, Japan; Kochi Health Science Center, Kochi, Japan; Japanese Red Cross Okayama Hospital, Okayama, Japan; Shikoku Cancer Center, Matsumoto, Ehime, Japan; Nashonal Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Faculty of Sport Sciences, Waseda University, Shinjuku-ku, Tokyo, Japan
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Yamane K, Sakamoto M, Murakami N, Morita R, Oka K. Picosecond rotation of a ring-shaped optical lattice by using a chirped vortex-pulse pair. Opt Lett 2016; 41:4597-4600. [PMID: 27749890 DOI: 10.1364/ol.41.004597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel method of ultrafast rotation of a ring-shaped optical lattice in the picosecond time region was proposed and demonstrated. Our ring-lattice generator was assembled by a pair of linearly chirped pulses with a time delay, a high-order birefringent retarder, and an axially symmetric polarization element. Using a mode-locked Ti:sapphire laser oscillator as a light source, stable two-, four-, and six-petaled ring-lattice rotations were demonstrated with the rotation periods of 1.6, 3.2, and 4.8 ps, respectively. Our method has the potential to open up a new technique to resonantly excite propagating quasi-particles together with their coherent enhancement.
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Isa K, Oka K, Beauchamp N, Sato M, Wada K, Ohtani K, Nakanishi S, McCartney E, Tanaka M, Shimizu T, Kamiya S, Kruger C, Takahashi M. Safety assessment of the Clostridium butyricum MIYAIRI 588® probiotic strain including evaluation of antimicrobial sensitivity and presence of Clostridium toxin genes in vitro and teratogenicity in vivo. Hum Exp Toxicol 2016; 35:818-32. [DOI: 10.1177/0960327115607372] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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]
Abstract
Probiotics are live microorganisms ingested for the purpose of conferring a health benefit on the host. Development of new probiotics includes the need for safety evaluations that should consider factors such as pathogenicity, infectivity, virulence factors, toxicity, and metabolic activity. Clostridium butyricum MIYAIRI 588® (CBM 588®), an anaerobic spore-forming bacterium, has been developed as a probiotic for use by humans and food animals. Safety studies of this probiotic strain have been conducted and include assessment of antimicrobial sensitivity, documentation of the lack of Clostridium toxin genes, and evaluation of CBM 588® on reproductive and developmental toxicity in a rodent model. With the exception of aminoglycosides, to which anaerobes are intrinsically resistant, CBM 588® showed sensitivity to all antibiotic classes important in human and animal therapeutics. In addition, analysis of the CBM 588® genome established the absence of genes for encoding for α, β, or ε toxins and botulin neurotoxins types A, B, E, or F. There were no deleterious reproductive and developmental effects observed in mice associated with the administration of CBM 588®. These data provide further support for the safety of CBM 588® for use as a probiotic in animals and humans.
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Affiliation(s)
- K Isa
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
| | - K Oka
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
| | | | - M Sato
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
| | - K Wada
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
| | - K Ohtani
- Department of Bacteriology, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan
| | - S Nakanishi
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
- Deceased
| | | | - M Tanaka
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
| | - T Shimizu
- Department of Bacteriology, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan
- Deceased
| | - S Kamiya
- Department of Infectious Diseases, Kyorin University School of Medicine, Tokyo, Japan
| | - C Kruger
- Spherix Consulting, Rockville, MD, USA
| | - M Takahashi
- Miyarisan Pharmaceutical Co., Ltd, Tokyo, Japan
- Department of Infectious Diseases, Kyorin University School of Medicine, Tokyo, Japan
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Kazekawa K, Oka K, Aikawa H, Tomonaga M, Yoshimura S, Yoshioka T, Hosoda H. How to Embolize Wide-Necked Aneurysms? Interv Neuroradiol 2016; 5 Suppl 1:103-8. [DOI: 10.1177/15910199990050s119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/1999] [Accepted: 09/30/1999] [Indexed: 11/16/2022] Open
Abstract
Novel endovascular approaches are needed for safer and more definitive treatment of wide-necked aneurysms, to overcome the limitations of the Guglielmi detachable coil (GDC) system and further, the application of this technique. The double GDC technique (DGT), for embolization of wide-necked aneurysms, and the combination of stent placement and coil deposition (CTSC) for management of fusiform aneurysms have been developed and their usefulness is reviewed. The DGT involves scaffolding of a GDC coil to form a stabilizing frame inside the aneurysmal neck and then positioning of a second coil to reinforce the first coil. After confirming the absence of coil herniation in the parent artery, both coils are released together. A patient with a wide-necked large aneurysm of the left internal carotid artery was treated using this technique, and followed up angiographically and clinically for a period of three months. The follow-up angiograms revealed complete embolization of the aneurysm. The patient had no neurological changes or adverse events during the procedure. The CTSC involves reconstructing the artery with a stent and packing the aneurysm lumen with GDCs through the stent interstices. A patient with a dissecting fusiform aneurysm of the vertebral artery associated with hypoplasia of the contralateral vertebral artery was treated using this technique to prevent rebleeding. His clinical course was uneventful over a six-month follow-up period. Angiography performed two months after the procedure confirmed excellent flow through the right vertebral artery and absence of filling of the daughter aneurysm.
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Affiliation(s)
| | | | | | | | - S. Yoshimura
- Department of Neurosurgery, Gifu University School of Medicine; Gifu
| | - T. Yoshioka
- Department of Neurosurgery, Yahata Municipal Hospital; Kitakyushu
| | - H. Hosoda
- Department of Neurosurgery, Chigasaki Tokushukai General Hospital; Chigasaki
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Kato T, Oka K, Nakamura T, Ito A. Decreased expression of Met during differentiation in rat lung. Eur J Histochem 2016; 60:2575. [PMID: 26972715 PMCID: PMC4800251 DOI: 10.4081/ejh.2016.2575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 10/12/2015] [Revised: 01/05/2016] [Accepted: 01/05/2016] [Indexed: 12/02/2022] Open
Abstract
Organ-specific stem cells play key roles in maintaining the epithelial cell layers of lung. Bronchioalveolar stem cells (BASCs) are distal lung epithelial stem cells of adult mice. Alveolar type 2 (AT2) cells have important functions and serve as progenitor cells of alveolar type 1 (AT1) cells to repair the epithelium when they are injured. Hepatocyte growth factor (HGF) elicits mitogenic, morphogenic, and anti-apoptotic effects on lung epithelial cells through tyrosine phosphorylation of Met receptor, and thus is recognized as a pulmotrophic factor. To understand which cells HGF targets in lung, we identified the cells expressing Met by immunofluorescence assay. Met was strongly expressed in BASCs, which expressed an AT2 cell marker, pro-SP-C, and a club cell marker, CCSP. In alveoli, we found higher expression of Met in primary AT2 than in AT1 cells, which was confirmed using primary AT2 cells. We further examined the mitogenic activity of HGF in AT2-cell-derived alveolar-like cysts (ALCs) in 3D culture. Multicellular ALCs expressed Met, and HGF enhanced the ALC production. Taking these findings together, BASCs could also be an important target for HGF, and HGF-Met signaling could function more potent on cells that have greater multipotency in adult lung.
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Yamanaka R, Shindo Y, Karube T, Hotta K, Suzuki K, Oka K. Neural depolarization triggers Mg2+ influx in rat hippocampal neurons. Neuroscience 2015; 310:731-41. [DOI: 10.1016/j.neuroscience.2015.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/26/2015] [Accepted: 10/02/2015] [Indexed: 12/14/2022]
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Abstract
Microthrombi in 43 untreated and 26 treated cases of DIC were studied histologically and immunohistochemically. In the untreated cases, four types of microthrombi (intraluminal microthrombi with or without fibroblastic and/or smooth muscle cell reaction) were identified. Microthrombi in the former three types showed various degrees of thrombolysis. Failure of thrombolysis seemed to lead the organization of microthrombi. These morphological findings were considered to indicate the course of DIC and the degree of disappearance of the microthrombi in DIC. Microthrombi in the hepatic sinusoids and glomerular capillaries were studied with special reference to the removal processes of the microthrombi. Pathogenesis of renal cortical necrosis in DIC was also discussed. The number of microthrombi was markedly decreased by heparin and gabexate mesilate treatment. The incidences of microthrombi in the liver, kidney, lung, and heart were compared in the two treated groups.
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Kuga Y, Takeda N, Oka K, Shibata H, Kitagawa H, Matsui A, Yoshida N, Katoh T, Iwata M, Yamada T. [Case Report; A case of pulmonary sclerosing hemangioma in a young male]. ACTA ACUST UNITED AC 2015; 104:103-6. [PMID: 26571782 DOI: 10.2169/naika.104.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kira-Tatsuoka M, Oka K, Tsuruga E, Ozaki M, Sawa Y. Immunohistochemical expression of fibrillin-1 and fibrillin-2 during tooth development. J Periodontal Res 2014; 50:714-20. [PMID: 25524144 DOI: 10.1111/jre.12256] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND OBJECTIVE Oxytalan fibers are categorized as a microfibril assembly without elastin deposition, and are unique components in the periodontal ligament (PDL). However, little is known about their formation during PDL development. To clarify the mechanisms of oxytalan fiber formation in developing PDL, we performed immunohistochemical analysis to detect the direct expression of fibrillin-1 and fibrillin-2, which are major components of microfibrils. MATERIAL AND METHODS Frozen sections of lower molars from mice at several stages of growth were prepared without chemical fixation and decalcification using the film transfer method. Immunostaining was performed with anti-fibrillin-1 and -2, and anticytokeratin antibodies. RESULTS Fibrillin-1 was not expressed in the dental follicle during the crown forming stage. At postneonatal day 9, fibrillin-1 expression started with meshwork appearance between the epithelial cells from Hertwig's epithelial root sheath at the root dentin surface. Fibirillin-2 was detected much earlier than fibrillin-1 expression. Fibrillin-2 was expressed with a liner appearance, running parallel to the root axis in PDL, and was partially co-expressed with cytokeratin 14 expression in Hertwig's epithelial root sheath. Furthermore, we detected both fibrillin-1 and fibrillin-2 expression in human PDL. Fibrillin-1 was detected in fibers with a vertically oriented root axis in PDL. Fibrillin-2 was widely expressed in PDL, including around the epithelial cell rests of Malassez. Fibrillin-1 and fibrillin-2 were clearly co-expressed in thick fiber structures in human PDL. CONCLUSION Our results suggest that both fibrillin-1 and fibrillin-2 expression is required to form thick oxytalan fibers in PDL. Based on the expression patterns for fibrillin-1 and fibrillin-2, they have different functions during tooth root and PDL development. Early expression of fibrillin-2 may regulate dental epithelial cell behavior during root and PDL development.
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Affiliation(s)
- M Kira-Tatsuoka
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan.,Section of Functional Structure, Department of Morphological Biology, Fukuoka Dental College, Fukuoka, Japan
| | - K Oka
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan
| | - E Tsuruga
- Section of Functional Structure, Department of Morphological Biology, Fukuoka Dental College, Fukuoka, Japan
| | - M Ozaki
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan
| | - Y Sawa
- Section of Functional Structure, Department of Morphological Biology, Fukuoka Dental College, Fukuoka, Japan
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Ishii K, Shibataf A, Oka K. Recess physical activity and perceived school environment among elementary school children. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Oka K, Ishii K, Shibata A. Descriptive epidemiology of objectively measured sedentary time among Japanese adults. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lai WF, Oka K, Jung HS. Advanced functional polymers for regenerative and therapeutic dentistry. Oral Dis 2014; 21:550-7. [PMID: 25098817 DOI: 10.1111/odi.12281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 06/23/2014] [Accepted: 08/01/2014] [Indexed: 01/16/2023]
Abstract
Use of ceramics and polymers continues to dominate clinical procedures in modern dentistry. Polymers have provided the basis for adhesives, tissue void fillers, and artificial replacements for whole teeth. They have been remarkably effective in the clinic at restoration of major dental functions after damage or loss of teeth. With the rapid development of polymer science, dental materials science has significantly lagged behind in harnessing these advanced polymer products. What they offer is new and unique properties superior to traditional polymers and crucially a range of properties that more closely match natural biomaterials. Therefore, we should pursue more vigorously the benefits of advanced polymers in dentistry. In this review, we highlight how the latest generation of advanced polymers will enhance the application of materials in the dental clinic using numerous promising examples. Polymers have a broad range of applications in modern dentistry. Some major applications are to construct frameworks that mimic the precise structure of tissues, to restore tooth organ function, and to deliver bioactive agents to influence cell behavior from the inside. The future of polymers in dentistry must include all these new enhancements to increase biological and clinical effectiveness beyond what can be achieved with traditional biomaterials.
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Affiliation(s)
- W-F Lai
- Division in Anatomy and Developmental Biology, Department of Oral Biology, BK21 PLUS Project, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Korea
| | - K Oka
- Section of Pediatric Dentistry, Department of Oral Growth and Development, Fukuoka Dental College, Fukuoka, Japan
| | - H-S Jung
- Division in Anatomy and Developmental Biology, Department of Oral Biology, BK21 PLUS Project, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Korea.,Oral Biosciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
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Murase T, Takeyasu Y, Oka K, Kataoka T, Tanaka H, Yoshikawa H. Three-Dimensional Corrective Osteotomy for Cubitus Varus Deformity with Use of Custom-Made Surgical Guides. JBJS Essent Surg Tech 2014. [DOI: 10.2106/jbjs.st.m.00044.test] [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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Shimoi T, Mizutani K, Kojima D, Kitamura Y, Hotta K, Ogawa H, Oka K. Identification of oscillatory firing neurons associated with locomotion in the earthworm through synapse imaging. Neuroscience 2014; 268:149-58. [PMID: 24657777 DOI: 10.1016/j.neuroscience.2014.03.016] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 03/06/2014] [Accepted: 03/10/2014] [Indexed: 11/16/2022]
Abstract
We used FM imaging to identify neurons that receive sensory feedback from the body wall in a circuit for octopamine (OA)-evoked rhythmic locomotion in the earthworm, Eisenia fetida. We visualized synapses in which postsynaptic neurons receive the sensory feedback, by using FM1-43 dye to label the synapses of both motor and sensory pathways that are associated with locomotion, then clearing the motor pathway synapse labeling, and finally identifying the target synapses by distinguishing physiologically functional synapses through destaining using a high-K(+) solution. A pair of synaptic regions associated with the sensory feedback was found to be located two or three cell body-widths away from the midline, between the anterior parts of the roots of the second lateral nerves (LNs) at the segmental ganglia (SGs). Using conventional intracellular recording and dye loading of the cell bodies surrounding these synaptic regions, we identified a pair of bilateral neurons with cell bodies larger than those of other cells in these regions, and named them "Oscillatory firing neurons Projecting to Peripheral nerves" (OPPs). These had a bipolar shape and projected neurites to the ipsilateral first and third LNs, fired rhythmically, and had a burst timing synchronized with the motor pattern bursts from the ipsilateral first LNs. Current injection into an OPP caused firing in the ipsilateral first LNs, supporting the hypothesis that OPPs functionally project to the peripheral nerves. OPPs also sent neurites to the adjacent anterior and posterior SGs, suggesting connections with the adjacent segments. We conclude that FM imaging can be used to identify neurons involved in specific functions, and that OPPs are the first neurons to be associated with OA-induced locomotion in the earthworm.
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Affiliation(s)
- T Shimoi
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - K Mizutani
- Department of Human and Information Science, Tokai University, Kanagawa, Japan
| | - D Kojima
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - Y Kitamura
- Department of Mathematical Sciences and Physics, College of Science and Engineering, Kanto Gakuin University, Yokohama, Japan
| | - K Hotta
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - H Ogawa
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - K Oka
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan.
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Miyake J, Shimada K, Oka K, Tanaka H, Sugamoto K, Yoshikawa H, Murase T. Arthroscopic debridement in the treatment of patients with osteoarthritis of the elbow, based on computer simulation. Bone Joint J 2014; 96-B:237-41. [DOI: 10.1302/0301-620x.96b2.30714] [Citation(s) in RCA: 21] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We retrospectively assessed the value of identifying impinging osteophytes using dynamic computer simulation of CT scans of the elbow in assisting their arthroscopic removal in patients with osteoarthritis of the elbow. A total of 20 patients were treated (19 men and one woman, mean age 38 years (19 to 55)) and followed for a mean of 25 months (24 to 29). We located the impinging osteophytes dynamically using computerised three-dimensional models of the elbow based on CT data in three positions of flexion of the elbow. These were then removed arthroscopically and a capsular release was performed. The mean loss of extension improved from 23° (10° to 45°) pre-operatively to 9° (0° to 25°) post-operatively, and the mean flexion improved from 121° (80° to 140°) pre-operatively to 130° (110° to 145°) post-operatively. The mean Mayo Elbow Performance Score improved from 62 (30 to 85) to 95 (70 to 100) post-operatively. All patients had pain in the elbow pre-operatively which disappeared or decreased post-operatively. According to their Mayo scores, 14 patients had an excellent clinical outcome and six a good outcome; 15 were very satisfied and five were satisfied with their post-operative outcome. We recommend this technique in the surgical management of patients with osteoarthritis of the elbow. Cite this article: Bone Joint J 2014;96-B:237–41.
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Affiliation(s)
- J. Miyake
- Osaka University Graduate School of Medicine, Department
of Orthopaedic Surgery, 2-2 Yamadaoka, Suita, Osaka
565-0871, Japan
| | - K. Shimada
- Osaka Koseinenkin Hospital, Department
of Orthopaedic Surgery, 4-2-78 Fukushima, Osaka
553-0003, Japan
| | - K. Oka
- Osaka University Graduate School of Medicine, Department
of Orthopaedic Surgery, 2-2 Yamadaoka, Suita, Osaka
565-0871, Japan
| | - H. Tanaka
- Osaka University Graduate School of Medicine, Department
of Orthopaedic Surgery, 2-2 Yamadaoka, Suita, Osaka
565-0871, Japan
| | - K. Sugamoto
- Osaka University Graduate School of Medicine, Department
of Orthopaedic Biomaterial Science, 2-2 Yamadaoka, Suita, Osaka
565-0871, Japan
| | - H. Yoshikawa
- Osaka University Graduate School of Medicine, Department
of Orthopaedic Surgery, 2-2 Yamadaoka, Suita, Osaka
565-0871, Japan
| | - T. Murase
- Osaka University Graduate School of Medicine, Department
of Orthopaedic Surgery, 2-2 Yamadaoka, Suita, Osaka
565-0871, Japan
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Yanagida T, Nagashima K, Oka K, Kanai M, Klamchuen A, Park BH, Kawai T. Scaling effect on unipolar and bipolar resistive switching of metal oxides. Sci Rep 2013; 3:1657. [PMID: 23584551 PMCID: PMC3625919 DOI: 10.1038/srep01657] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [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] [Received: 01/03/2013] [Accepted: 03/18/2013] [Indexed: 11/08/2022] Open
Abstract
Electrically driven resistance change in metal oxides opens up an interdisciplinary research field for next-generation non-volatile memory. Resistive switching exhibits an electrical polarity dependent "bipolar-switching" and a polarity independent "unipolar-switching", however tailoring the electrical polarity has been a challenging issue. Here we demonstrate a scaling effect on the emergence of the electrical polarity by examining the resistive switching behaviors of Pt/oxide/Pt junctions over 8 orders of magnitudes in the areas. We show that the emergence of two electrical polarities can be categorised as a diagram of an electric field and a cell area. This trend is qualitatively common for various oxides including NiOx, CoOx, and TiO(2-x). We reveal the intrinsic difference between unipolar switching and bipolar switching on the area dependence, which causes a diversity of an electrical polarity for various resistive switching devices with different geometries. This will provide a foundation for tailoring resistive switching behaviors of metal oxides.
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Affiliation(s)
- Takeshi Yanagida
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Kazuki Nagashima
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Keisuke Oka
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Masaki Kanai
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Annop Klamchuen
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Bae Ho Park
- Division of Quantum Phases & Devices, Department of Physics, Konkuk University, Seoul 143-701, Korea
| | - Tomoji Kawai
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- Division of Quantum Phases & Devices, Department of Physics, Konkuk University, Seoul 143-701, Korea
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Ishii K, Shibata A, Oka K. Recommended physical activity and depression in Japanese adults. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.053] [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: 10/27/2022]
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Liao Y, Harada K, Shibata A, Ishii K, Oka K, Nakamura Y, Inoue S, Shimomitsu T. Association of self-reported physical activity patterns and socio-demographic factors among normal-weight and overweight Japanese men. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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