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Kubota Y, Tsubouchi Y, Anan M, Kawano M, Iwasaki T, Itonaga I, Ikeda S, Kataoka M, Tsumura H, Kaku N, Tanaka K. Gait analysis of a patient after femoral nerve and malignant soft tissue tumor resections: a case report. BMC Musculoskelet Disord 2024; 25:131. [PMID: 38347547 PMCID: PMC10860307 DOI: 10.1186/s12891-024-07258-8] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 02/04/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Malignant femoral soft tissue tumors are occasionally resected together with the femoral nerves, but this can cause loss of knee extensor muscle activity. To the best of our knowledge, no previous reports have detailed the gait analysis of such cases in combination with electromyography. Herein, we report the gait analysis of a patient who underwent left groin synovial sarcoma and left femoral nerve resection 12 years ago. CASE PRESENTATION We analyzed the gait of a 38-year-old man who was able to walk unaided after the resection of a synovial sarcoma in the left groin together with the ipsilateral femoral nerve. The muscle activities of the affected medial (MH) and lateral hamstrings (LH), and lateral heads of the gastrocnemius (GL) were increased during 50-75% of the stance phase. The hip flexion angle of the affected limb was smaller, and the ankle plantar flexion angle of the affected limb was larger than that of the non-affected limb. This means that in the affected limb, the hip and ankle angles were adjusted to prevent knee collapse, and the MH, LH, and GL muscles contributed in the mid- and late-stance phases. Moreover, we found that the hamstring and gastrocnemius of the affected limb worked together to keep the ipsilateral knee extended in the mid-stance phase and slightly flexed in the late-stance phase. CONCLUSIONS Patients capable of walking after femoral nerve resection may control their hamstrings and gastrocnemius muscles collaboratively to prevent ipsilateral knee collapse in the mid- and late-stance phases.
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Affiliation(s)
- Yuta Kubota
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
| | - Yuta Tsubouchi
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
- School of Physical Therapy, Faculty of Rehabilitation, Reiwa Health Sciences University, 2-1-12 Wajirogaoka, Higashi-Ku, Fukuoka, 811-0213, Japan
| | - Masaya Anan
- Physical Therapy Course of Study, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita-City, Oita, 870-1192, Japan
| | - Masanori Kawano
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
| | - Tatsuya Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
| | - Ichiro Itonaga
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
| | - Shinichi Ikeda
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
- Department of Rehabilitation Medicine, Beppu Rehabilitation Center, 1026-10 Tsurumi, Beppu-Shi, Oita, 874-8611, Japan
| | - Masashi Kataoka
- Physical Therapy Course of Study, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita-City, Oita, 870-1192, Japan
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
| | - Nobuhiro Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan
| | - Kazuhiro Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan.
- Department of Advanced Medical Sciences, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama, Yufu City, Oita, 879-5593, Japan.
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Chen J, Ikeda SI, Kang L, Negishi K, Tsubota K, Kurihara T. Bisphenol A exposure triggers endoplasmic reticulum stress pathway leading to ocular axial elongation in mice. Front Med (Lausanne) 2023; 10:1255121. [PMID: 37746069 PMCID: PMC10517050 DOI: 10.3389/fmed.2023.1255121] [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] [Received: 07/08/2023] [Accepted: 08/23/2023] [Indexed: 09/26/2023] Open
Abstract
Background Ocular axial elongation is one of the features of myopia progression. Endoplasmic reticulum (ER) stress-associated scleral remodeling plays an important role in ocular axial elongation. Bisphenol A (BPA) is one of the most common environmental pollutants and is known to affect various human organs through ER stress. However, whether BPA exerts an effect on scleral remodeling remains unknown. The purpose of this study was to determine the effect of BPA on the development of myopia and scleral ER stress. Methods BPA was administered by intraperitoneal injection. 4-PBA was administered as an endoplasmic reticulum stress inhibitor by eye drops. Refraction and axial length were measured by refractometer and SD-OCT system. Western blot was performed to detect the expression level of ER stress-related proteins. Results BPA-administered mice exhibit axial elongation and myopic refractive shift with endoplasmic reticulum stress in the sclera. BPA administration activated scleral PERK and ATF6 pathways, and 4-PBA eye drops attenuated ER stress response and suppressed myopia progression. Conclusion BPA controlled axial elongation during myopia development in a mouse model by inducing scleral ER stress and activation of the PERK/ATF6 pathway. 4-PBA eye drops as ER stress inhibitor suppressed BPA-induced myopia development.
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Affiliation(s)
- Junhan Chen
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Shin-ichi Ikeda
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Longdan Kang
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, The First Hospital of China Medical University, Shenyang, China
| | - Kazuno Negishi
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
- Tsubota Laboratory, Inc., Tokyo, Japan
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
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Kakehi S, Tamura Y, Ikeda SI, Kaga N, Taka H, Nishida Y, Kawamori R, Watada H. Physical inactivity induces insulin resistance in plantaris muscle through protein tyrosine phosphatase 1B activation in mice. Front Physiol 2023; 14:1198390. [PMID: 37389126 PMCID: PMC10300557 DOI: 10.3389/fphys.2023.1198390] [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] [Received: 04/01/2023] [Accepted: 06/05/2023] [Indexed: 07/01/2023] Open
Abstract
Inactivity causes insulin resistance in skeletal muscle and exacerbates various lifestyle-related diseases. We previously found that 24-h hindlimb cast immobilization (HCI) of the predominantly slow-twitch soleus muscle increased intramyocellular diacylglycerol (IMDG) and insulin resistance by activation of lipin1, and HCI after a high-fat diet (HFD) further aggravated insulin resistance. Here, we investigated the effects of HCI on the fast-twitch-predominant plantaris muscle. HCI reduced the insulin sensitivity of plantaris muscle by approximately 30%, and HCI following HFD dramatically reduced insulin sensitivity by approximately 70% without significant changes in the amount of IMDG. Insulin-stimulated phosphorylation levels of insulin receptor (IR), IR substrate-1, and Akt were reduced in parallel with the decrease in insulin sensitivity. Furthermore, tyrosine phosphatase 1B (PTP1B), a protein known to inhibit insulin action by dephosphorylating IR, was activated, and PTP1B inhibition canceled HCI-induced insulin resistance. In conclusion, HCI causes insulin resistance in the fast-twitch-predominant plantaris muscle as well as in the slow-twitch-predominant soleus muscle, and HFD potentiates these effects in both muscle types. However, the mechanism differed between soleus and plantaris muscles, since insulin resistance was mediated by the PTP1B inhibition at IR in plantaris muscle.
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Affiliation(s)
- Saori Kakehi
- Department of Metabolism and Endocrinology, Tokyo, Japan
- Sportology Center, Tokyo, Japan
| | - Yoshifumi Tamura
- Department of Metabolism and Endocrinology, Tokyo, Japan
- Sportology Center, Tokyo, Japan
| | - Shin-ichi Ikeda
- Department of Metabolism and Endocrinology, Tokyo, Japan
- Sportology Center, Tokyo, Japan
| | - Naoko Kaga
- Division of Proteomics and Biomolecular Science, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hikari Taka
- Division of Proteomics and Biomolecular Science, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuya Nishida
- Department of Metabolism and Endocrinology, Tokyo, Japan
| | - Ryuzo Kawamori
- Department of Metabolism and Endocrinology, Tokyo, Japan
- Sportology Center, Tokyo, Japan
| | - Hirotaka Watada
- Department of Metabolism and Endocrinology, Tokyo, Japan
- Sportology Center, Tokyo, Japan
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Ikeda S, Kaku N, Hosoyama T, Tsumura H. Survival rates of different bearing surfaces with the same model of stem in total hip arthroplasty: predictive factors for revision surgery. Arch Orthop Trauma Surg 2022:10.1007/s00402-022-04706-9. [PMID: 36443614 DOI: 10.1007/s00402-022-04706-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 11/21/2022] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Few studies have examined the survival rates of total hip arthroplasty (THA) with the same femoral stem, and the predictive factors leading to the revision of stemmed metal-on-metal (MoM) THA remain unknown. We determined the long-term survival rate of stemmed MoM THA compared with that of metal-on-polyethylene (MoP) bearing THA, the effect of head size and cup placement angle on revision rate, and predictors of revision. MATERIALS AND METHODS A total of 130 hips in 110 patients who underwent primary THA by the same surgeon were included. M2a-RingLoc with a metal-on-polyethylene bearing (group P, 53 hips), M2a-Taper with MoM bearing (group T, 44 hips), and M2a-Magnum with MoM bearing (group M, 33 hips) were used. The mean age at surgery was 63.1 ± 9.5 years, and the mean postoperative follow-up duration was 133.7 ± 39.1 months. Whole blood metal ion concentrations were measured preoperatively and postoperatively, and magnetic resonance imaging was performed to identify aseptic local tissue reactions (ALTRs). Kaplan-Meier survivorship analysis and multiple logistic regression analysis were performed. RESULTS The THA survival rate up to the maximum postoperative follow-up period was 96.2% at 173 months, 46.6% at 179 months, and 47.8% at 145 months in groups P, T, and M, respectively, with revision as the endpoint. The stemmed MoM THA recorded a very low survival rate (p < 0.001). The ALTR rates were 70.5% and 63.6% in groups T and M, respectively. The risk factor for revision was the use of MoM bearing, and there was no difference in the results based on the head size in group M. Cobalt levels continued to increase postoperatively, although they were not accurate predictors of revision. CONCLUSIONS Stemmed MoM THA has a very low survival rate and should be used with caution. It is important to monitor the patient's symptoms and perform appropriate imaging to ensure timely revision.
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Affiliation(s)
- Shinichi Ikeda
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama-Machi, Yufu, Oita, 879-5593, Japan
| | - Nobuhiro Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama-Machi, Yufu, Oita, 879-5593, Japan.
| | - Tsuguaki Hosoyama
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama-Machi, Yufu, Oita, 879-5593, Japan
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hasama-Machi, Yufu, Oita, 879-5593, Japan
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Tanaka K, Anan M, Tsubouchi Y, Iwasaki T, Kawano M, Itonaga I, Ikeda S, Kataoka M, Suenobu S, Tsumura H. Gait analysis of a patient who underwent complete resection of the patella and quadriceps femoris for soft tissue sarcoma. Eur J Phys Rehabil Med 2021; 57:298-302. [PMID: 33619941 DOI: 10.23736/s1973-9087.21.06395-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The knee extension mechanism including the quadriceps femoris muscles and patella plays a crucial role in the stance phase of a normal gait cycle. We performed gait analysis of a patient who had undergone complete resection of the knee extension mechanism. An 8-month-old boy developed infantile fibrosarcoma of the right knee and underwent resection of the quadriceps femoris muscles, patella, and patellar tendon. The gait analysis performed at 8 years of age demonstrated that he could maintain the knee joint extension position during the stance phase. Increased muscle activities in the hamstring and gastrocnemius were observed. The results suggest that the hamstring and gastrocnemius muscles might play a role in maintaining the knee extension position during the stance phase. We suggest the importance of reinforcing these muscles in rehabilitation for patients who lost the knee extension mechanism.
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Affiliation(s)
- Kazuhiro Tanaka
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, Oita, Japan -
| | - Masaya Anan
- Physical Therapy Course of Study, Faculty of Welfare and Health Sciences, Oita University, Oita, Japan
| | - Yuta Tsubouchi
- Oita University Hospital Rehabilitation Center, Oita University, Oita, Japan
| | - Tatsuya Iwasaki
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Masanori Kawano
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Ichiro Itonaga
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Shinichi Ikeda
- Department of Rehabilitation Medicine, Faculty of Medicine, Oita University, Oita, Japan
| | - Masashi Kataoka
- Physical Therapy Course of Study, Faculty of Welfare and Health Sciences, Oita University, Oita, Japan
| | - Souichi Suenobu
- Division of General Pediatrics and Emergency Medicine, Department of Pediatrics, Faculty of Medicine, Oita University, Oita, Japan
| | - Hiroshi Tsumura
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, Oita, Japan
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Yamada K, Ito YM, Akagi M, Chosa E, Fuji T, Hirano K, Ikeda S, Ishibashi H, Ishibashi Y, Ishijima M, Itoi E, Iwasaki N, Izumida R, Kadoya K, Kamimura M, Kanaji A, Kato H, Kishida S, Mashima N, Matsuda S, Matsui Y, Matsunaga T, Miyakoshi N, Mizuta H, Nakamura Y, Nakata K, Omori G, Osuka K, Uchio Y, Ryu K, Sasaki N, Sato K, Senda M, Sudo A, Takahira N, Tsumura H, Yamaguchi S, Yamamoto N, Nakamura K, Takashi Ohe. Reference values for the locomotive syndrome risk test quantifying mobility of 8681 adults aged 20-89 years: A cross-sectional nationwide study in Japan. J Orthop Sci 2020; 25:1084-1092. [PMID: 32173180 DOI: 10.1016/j.jos.2020.01.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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] [Received: 09/26/2019] [Revised: 11/28/2019] [Accepted: 01/06/2020] [Indexed: 02/09/2023]
Abstract
BACKGROUND The locomotive syndrome risk test was developed to quantify the decrease in mobility among adults, which could eventually lead to disability. The purpose of this study was to establish reference values for the locomotive syndrome risk test for adults and investigate the influence of age and sex. METHODS We analyzed 8681 independent community dwellers (3607 men, 5074 women). Data pertaining to locomotive syndrome risk test (the two-step test, the stand-up test, and the 25-question geriatric locomotive function scale [GLFS-25]) scores were collected from seven administrative areas of Japan. RESULTS The reference values of the three test scores were generated and all three test scores gradually decreased among young-to-middle-aged individuals and rapidly decreased in individuals aged over 60 years. The stand-up test score began decreasing significantly from the age of 30 years. The trajectories of decrease in the two-step test score with age was slightly different between men and women especially among the middle-aged individuals. The two physical test scores were more sensitive to aging than the self-reported test score. CONCLUSION The reference values generated in this study could be employed to determine whether an individual has mobility comparable to independent community dwellers of the same age and sex.
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Affiliation(s)
- Keiko Yamada
- Departments of Sensory & Motor System Medicine, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; Department of Planning, Information and Management, University of Tokyo Hospital, Tokyo, Japan; "Locomo Challenge!" Promotion Council, Tokyo, Japan.
| | - Yoichi M Ito
- Department of Statistical Data Science, The Institute of Statistical Mathematics, Tokyo, Japan.
| | - Masao Akagi
- Department of Orthopedic Surgery, Kindai University Hospital, Osaka, Japan.
| | - Etsuo Chosa
- Department of Orthopaedic Surgery, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, Japan.
| | - Takeshi Fuji
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Orthopaedic Surgery, Japan Community Healthcare Organization Osaka Hospital, Osaka, Japan.
| | | | - Shinichi Ikeda
- Department of Orthopaedic Surgery, Oita University, Oita, Japan.
| | - Hideaki Ishibashi
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Orthopedic Surgery, Ina Hospital, Saitama, Japan.
| | - Yasuyuki Ishibashi
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, Aomori, Japan.
| | - Muneaki Ishijima
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - Eiji Itoi
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Norimasa Iwasaki
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan.
| | - Ryoichi Izumida
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Keiyu Joint Reconstruction Center, Edogawa Hospital, Tokyo, Japan.
| | - Ken Kadoya
- Department of Advanced Medicine for Locomotor System, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan.
| | - Masayuki Kamimura
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Arihiko Kanaji
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan.
| | - Hiroyuki Kato
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Nagano, Japan.
| | - Shunji Kishida
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Orthopaedic Surgery, Seirei Sakura Citizen Hospital, Chiba, Japan.
| | - Naohiko Mashima
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Ehime, Japan.
| | - Shuichi Matsuda
- Department of Orthopaedic Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.
| | - Yasumoto Matsui
- Center for Frailty and Locomotive Syndrome, National Center for Geriatrics and Gerontology, Aichi, Japan.
| | - Toshiki Matsunaga
- Department of Rehabilitation Medicine, Akita University Hospital, Akita, Japan.
| | - Naohisa Miyakoshi
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, Akita, Japan.
| | - Hiroshi Mizuta
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
| | | | - Ken Nakata
- Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan.
| | - Go Omori
- Department of Sports and Health, Faculty of Health and Science, Niigata University of Health and Welfare, Nigata, Japan.
| | | | - Yuji Uchio
- Department of Orthopaedic Surgery, Shimane University, Shimane, Japan.
| | | | | | - Kimihito Sato
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Sato Orthopaedic Clinic, Tokyo, Japan.
| | - Masuo Senda
- Okayama University Hospital, Division of Physical Medicine and Rehabilitation, Okayama, Japan.
| | - Akihiro Sudo
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Mie, Japan.
| | - Naonobu Takahira
- Department of Rehabilitation, Kitasato University School of Allied Health Sciences, Kanagawa, Japan.
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Oita University, Oita, Japan.
| | - Satoshi Yamaguchi
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Collage of Liberal Arts and Sciences, Chiba University, Chiba, Japan.
| | | | - Kozo Nakamura
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Towa Hospital, Tokyo, Japan.
| | - Takashi Ohe
- "Locomo Challenge!" Promotion Council, Tokyo, Japan; Department of Orhtopaedic Surgery, NTT Medical Center, Tokyo, Japan.
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Mori K, Kurihara T, Jiang X, Ikeda SI, Ishida A, Torii H, Tsubota K. Effects of Hyperoxia on the Refraction in Murine Neonatal and Adult Models. Int J Mol Sci 2019; 20:ijms20236014. [PMID: 31795325 PMCID: PMC6928741 DOI: 10.3390/ijms20236014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 11/22/2019] [Accepted: 11/27/2019] [Indexed: 02/01/2023] Open
Abstract
Whether hyperoxia affects the refraction in neonatal and adult mice is unknown. The mice exposed to 85% oxygen at postnatal 8 days (P8d) for 3 days and the mice exposed to normal air were assigned to the neonatal hyperoxia and normoxia groups, respectively. The refraction, the corneal curvature radius (CR) and the axial length (AL) were measured at P30d and P47d. Postnatal 6 weeks (P6w) adult mice were divided into the adult hyperoxia and normoxia groups. These parameters were measured before oxygen exposure, after 1 and 6 weeks, and every 7 weeks. The lens elasticity was measured at P7w and P26w by enucleation. The neonatal hyperoxia group showed a significantly larger myopic change than the neonatal normoxia group (P47d −6.56 ± 5.89 D, +4.11 ± 2.02 D, p < 0.001), whereas the changes in AL were not significantly different (P47d, 3.31 ± 0.04 mm, 3.31 ± 0.05 mm, p = 0.852). The adult hyperoxia group also showed a significantly larger myopic change (P12w, −7.20 ± 4.09 D, +7.52 ± 2.54 D, p < 0.001). The AL did not show significant difference (P12w, 3.44 ± 0.03 mm, 3.43 ± 0.01 mm, p = 0.545); however, the CR in the adult hyperoxia group was significantly smaller than the adult normoxia group (P12w, 1.44 ± 0.03 mm, 1.50 ± 0.03 mm, p = 0.003). In conclusion, hyperoxia was demonstrated to induce myopic shift both in neonatal and adult mice, which was attributed to the change in the CR rather than the AL. Elucidation of the mechanisms of hyperoxia and the application of this result to humans should be carried out in future studies.
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Affiliation(s)
- Kiwako Mori
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Laboratory of Photobiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Toshihide Kurihara
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Laboratory of Photobiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
- Correspondence: (T.K.); (K.T.); Tel.: +81-3-5363-3204 (T.K.); +81-3-5363-3269 (K.T.)
| | - Xiaoyan Jiang
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Laboratory of Photobiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Shin-ichi Ikeda
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Laboratory of Photobiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Ayako Ishida
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Laboratory of Photobiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Hidemasa Torii
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Laboratory of Photobiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; (K.M.); (X.J.); (S.-i.I.); (A.I.); (H.T.)
- Tsubota Laboratory, Inc., Keio University Shinanomachi Campus 2-5F, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
- Correspondence: (T.K.); (K.T.); Tel.: +81-3-5363-3204 (T.K.); +81-3-5363-3269 (K.T.)
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Fujii A, Inoue KI, Kinoshita MK, Nagai TN, Sasaki YS, Akazawa YA, Higashi HH, Uetani TU, Aono JA, Nishimura KN, Ikeda SI, Yamaguchi OY. P2450The atrial electromechanical conduction delay with ultrasound based two-dimensional speckle-tracking predicts very late recurrence following catherter ablation for atrial fibrillation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0782] [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: 11/14/2022] Open
Abstract
Abstract
Background/Introduction
Long-term efficacy following catheter ablation (CA) of atrial fibrillation (AF) remains unknown. Left atrial (LA) reverse remodeling following CA may be important to reduce the risk of very late recurrence (VLR).
Purpose
We hypothesize that improved mechanical conduction delay with myocardial strain is associated with LA reverse remodeling indicates efficacy following AF ablation. This study aimed to investigate the clinical utility of mechanical conduction delay to predict VLR in patients with AF undergoing CA.
Methods
We enrolled 114 consecutive patients undergoing initial CA in patients with AF from January 2012 to February 2014. 20 patients were excluded due to poor echocardiographic image quality. 38 patients had AF recurrence within 12 months after CA. Finally, 54 patients (age 62 years, 13 female, 15 persistent AF) were analyzed. Trans-thoracic echocardiography (TTE) was performed within 24 hours as baseline, and every 6–12 months following the initial CA as follow-up. We compared the TTE data with baseline and latest test when sinus rhythm was maintained. To assess atrial electromechanical conduction delay, we adopted a parameter based on speckle tracking echocardiography (EMT-ε), which was defined as the interval from the P- wave onset to the peak late diastolic longitudinal strain in the basal lateral wall of LA (Figure).
Results
Eleven patients had VLR after CA. In patients with VLR, left atrial volume index (LAVI) at baseline was significantly higher than those without VLR (49±17 vs 35±14 ml/m2, P<0.05). EMT-ε had no significant difference between two groups (225±52 vs 208±49 ms, P=NS).
During 58±22 months, LAVI and EMT-ε were significantly improved (LAVI: 38±16 vs 33±14 ml/m2, EMT-ε: 215±48 vs 197±45 ms, P<0.05, respectively). The change of LAVI had no significant difference between two groups (−2 (−10, 4) vs 33 (−13, 6) ml/m2, P=NS). EMT-ε shortening was significantly greater in AF-free patients than patients with VLR (−27 (−66, −3) vs 23 (−1, 79) ms, P<0.01). At a cut-off value of −9 ms, the change of EMT-ε predicted VLR with sensitivity (100%) and specificity (68.9%).
Conclusion(s)
The atrial electromechanical conduction delay could predict VLR after CA in patients with AF.
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Affiliation(s)
- A Fujii
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - K I Inoue
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - M K Kinoshita
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - T N Nagai
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - Y S Sasaki
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - Y A Akazawa
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - H H Higashi
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - T U Uetani
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - J A Aono
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - K N Nishimura
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - S I Ikeda
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
| | - O Y Yamaguchi
- Ehime University Graduate School of Medicine,Integrated Medicine and Informatics Dept/Cardiology Div, Toon, Japan
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9
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Tsubouchi Y, Ikeda S, Kataoka M, Tsumura H. Combination therapy with low-dose teriparatide and zoledronate contributes to fracture healing on rat femoral fracture model. J Orthop Surg Res 2018; 13:267. [PMID: 30359257 PMCID: PMC6202815 DOI: 10.1186/s13018-018-0917-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 08/15/2018] [Indexed: 01/05/2023] Open
Abstract
Background Delay in fracture healing or non-union can be devastating complication. Recent studies have reported that teriparatide (TP) demonstrated effectively on callus formation and mechanical strength and zoledronate (ZA) increased the callus size and resistance at the fracture site in rat fracture model. In this study, the effects of combination therapy with low dose TP and ZA on fracture healing was evaluated. Methods From 1 week post-operation, TP (5 times a week administration) and ZA (0.1 mg/kg single administration) were administered by dividing the rats into the following five groups: TP 1 μg group {T(1): TP 1 μg/kg}, ZA group (ZA:0.1 mg/kg), TP1 μg+ZA group {T(1)+ZA: TP 1 μg/kg+ZA}, TP 10 μg+ZA group {T(10)+ZA: TP 10 μg/kg + ZA}, and control group (C: administered saline). Rt femurs were excised 7 weeks after the surgery; bone fusions were evaluated with soft X-ray images on a 4-point scale. And the histopathological examination was performed in demineralized and non-demineralized specimens. Furthermore, the Radiographic Union Scale was conducted in all specimens. Results About the bone fusions rates, C, T(1), ZA, T(1)+ZA, and T(10)+ZA groups demonstrated 20.0%, 55.6%, 70.0%, 70.0%, and 80.0%, respectively, and with 4-point scale, each group was 0.50, 1.56, 2.00, 2.60, and 2.80 points, respectively. The callus volume was significantly increased to 16.66 mm2 and 17.75 mm2 in the T(1)+ZA and T(10)+ZA groups, respectively, while 10.65 mm2 (p < 0.05) in the C group. Furthermore, the callus area in the T(10)+ZA group was also observed to have significantly increased to 78.78%, compared with 54.63% and 44.11% in the C and T(1)+ZA groups, respectively (p < 0.01). Histopathologically, cartilage tissue and immature callus formation were observed at the bone junction in the C group; however, the osseous bridge formation of mature callus was observed in the ZA, T(1)+ZA, and T(10)+ZA groups. Conclusion It is suggested that administration of low dose TP and ZA in combination may lead to the treatment of delayed union of fracture. We hope the combination treatment may become one of new therapeutic strategy.
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Affiliation(s)
- Yuta Tsubouchi
- Oita University Hospital Rehabilitation Center, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-city, Oita, 879-5593, Japan
| | - Shinichi Ikeda
- Department of Rehabilitation Medicine, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-city, Oita, 879-5593, Japan
| | - Masashi Kataoka
- Physical Therapy Course of Study, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita, 870-1192, Japan.
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-city, Oita, 879-5593, Japan
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10
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Okubo S, Ohta H, Ijima T, Yamasaki T, Zhang W, Hara S, Ikeda S, Oshima H, Takahashi M, Tomiyasu K, Watanabe T. THz ESR study of Spinel Compound GeCo2O4. Z PHYS CHEM 2016. [DOI: 10.1515/zpch-2016-0841] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
We performed terahertz ESR measurements of spin frustrated spinel compound GeCo2O4 using pulsed magnetic fields of up to 40 T. A very broad EPR absorption line was observed at 86 K. The g-values at 86 K were estimated to be g=5.26±0.07, 5.16±0.12 and 4.98±0.07 for B//[111], [100] and [110], respectively. High-field ESR measurements revealed complicated phase structures and a field-induced magnetic phase below 3 K. Critical fields of magnetic phases at 1.8 K for B//[111] were observed at 1.8 T, 5.0 T, 8.6 T, 11.0 T and 12.9 T for B//[111]. An energy gap of 300 GHz (=14.4 K=1.24 meV), which was related to the lattice deformation, was observed for B//[111]. The zero field gap of ω
4 mode, which is considered to be a singlet-triplet excitation of the di-tetramer, was estimated to be 1120 GHz.
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Affiliation(s)
- Susumu Okubo
- Molecular Photoscience Research Center, Kobe University, Rokkodai 1-1, Nada, 657-8501, Japan
| | - Hitoshi Ohta
- Molecular Photoscience Research Center, Kobe University, Rokkodai 1-1, Nada, 657-8501, Japan , Tel.: +81-78-8035654
| | - Tatsuya Ijima
- Graduate School of Science, Kobe University, Rokkodai 1-1, Nada, 657-8501, Japan
| | - Tatsuya Yamasaki
- Graduate School of Science, Kobe University, Rokkodai 1-1, Nada, 657-8501, Japan
| | - Weimin Zhang
- Molecular Photoscience Research Center, Kobe University, Rokkodai 1-1, Nada, 657-8501, Japan
| | - Shigeo Hara
- Department of Physics, Chuo Univeristy, Kasuga 1-13-27, Tokyo, 112-8551, Japan
| | - Shinichi Ikeda
- National Institute of Advanced Industrial Science and Technology, Umezono 1-1-1, Tsukuba, 305-8568, Japan
| | - Hiroyuki Oshima
- Institute of Material Science, University of Tsukuba, Tennoudai 1-1, Tsukuba, 305-8577, Japan
| | - Miwako Takahashi
- Institute of Material Science, University of Tsukuba, Tennoudai 1-1, Tsukuba, 305-8577, Japan
| | - Keisuke Tomiyasu
- Department of Physics, Tohoku University, Aramaki aza aoba 6-3, Sendai, 980-8578, Japan
| | - Tadataka Watanabe
- Department of Physics, College of Science and Technology, Nihon University, Kanda surugadai 1-8, Tokyo, 101-8308, Japan
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11
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Takahashi K, Yoshida H, Watanabe R, Ishikawa M, Ikeda SI, Kato T. Metastasis of extra-ampullary duodenal adenocarcinoma to the uterine cervix. Malays J Pathol 2016; 38:45-48. [PMID: 27126664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Secondary metastatic tumours of the uterine cervix are rare. There have been no reports of duodenal cancer metastasizing to the uterine cervix. Here we present a rare case of an extra-ampullary duodenal adenocarcinoma that has metastasized to the uterine cervix. The patient was a 71-year-old woman who had surgery for an extra-ampullary duodenal adenocarcinoma five years previously. Follow-up examination revealed a suspicious right ovarian mass and nodules in the cervix and posterior fornix of the vagina. Biopsies suggested squamous cell carcinoma in the cervix and adenocarcinoma in the fornix. Intraoperatively, the right ovary was enlarged and peritoneal disseminations were found in the pouch of Douglas and the sigmoid colon mesentery. Histopathology of the subsequent hysterectomy and bilateral salpingo-oophorectomy specimen revealed a cervical squamous cell carcinoma categorized as pT1b1. Adenocarcinoma infiltration into the ovaries, uterine cervix and vagina, with vascular involvement was detected. Immunohistochemistry revealed the tumour in the cervix and ovaries to be positive for CK7, MUC5AC and MUC6, and immunonegative for CK20, CDX2, Pax8, ER, MUC2 and CD10, similar to the original duodenal adenocarcinoma. This case illustrates the difficulty in making a preoperative diagnosis of metastatic adenocarcinoma in the uterine cervix with a coexisting primary cervical squamous cell carcinoma. The absence of atypia in cervical glandular cells and immunohistochemical profiling of the adenocarcinoma clusters helped to reach a final diagnosis. This is the first report of an extra-ampullary duodenal adenocarcinoma metastasis to the uterine cervix.
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Affiliation(s)
- K Takahashi
- National Cancer Center Hospital, Department of Pathology and Clinical Laboratories, Tokyo, Japan.
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12
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Kawano M, Tanaka K, Itonaga I, Iwasaki T, Miyazaki M, Ikeda S, Tsumura H. Dendritic cells combined with doxorubicin induces immunogenic cell death and exhibits antitumor effects for osteosarcoma. Oncol Lett 2016; 11:2169-2175. [PMID: 26998143 DOI: 10.3892/ol.2016.4175] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [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: 12/05/2014] [Accepted: 01/13/2016] [Indexed: 12/26/2022] Open
Abstract
The effects of dendritic cells (DCs) with low dose doxorubicin on the enhancement of the systemic immune response, including the effects on calreticulin (CRT) expression, heat shock protein 70 (HSP70) on the cell surface expression, and the enhancement of high mobility group box 1 (HMGB1) release from cancer cells, remain unclear. The present study investigated whether the combination of DCs and doxorubicin (ADM) induces immune cell death, and leads to tumor growth inhibition in a murine osteosarcoma model. To evaluate immune response activation in vivo, 4 groups of mice were established: i) untreated mice, ii) DC-treated mice, iii) ADM-treated mice, and iv) DC and ADM-treated mice. Immunological cell death and CRT, HSP70, and HMGB1 expression levels were higher in doxorubicin-treated cells than those in untreated or those treated with DCs alone. NF-κB expression was higher in the DCs after ligand activation using CRT, HSP70, or HMGB1 in vitro. Mice treated with DCs and ADM displayed an increased number of CD8+ T-lymphocytes within metastatic tumors and inhibition of metastatic growth. The expression of CRT and the release of HMGB1 from tumor tissues were increased in the ADM-treated groups. Treatment with DCs and ADM resulted in the highest serum interferon-γ levels. Combining ADM, which can induce immunogenic cell death, with DCs enhanced the systemic immune response. The findings of the present study provide further support for the continued development of antitumor agents that induce cell death and the immune response to target osteosarcoma.
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Affiliation(s)
- Masanori Kawano
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Kazuhiro Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Ichiro Itonaga
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Tatsuya Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Masashi Miyazaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Shinichi Ikeda
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu, Oita 879-5593, Japan
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13
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Tanaka K, Kawano M, Itonaga I, Iwasaki T, Miyazaki M, Ikeda S, Tsumura H. Tumor suppressive microRNA-138 inhibits metastatic potential via the targeting of focal adhesion kinase in Ewing's sarcoma cells. Int J Oncol 2016; 48:1135-44. [PMID: 26782922 DOI: 10.3892/ijo.2016.3317] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 12/14/2015] [Indexed: 11/05/2022] Open
Abstract
Short non-coding RNAs, called microRNAs (miRNAs), regulate cell biology by affecting the expression of target genes. However, we know little about the miRNAs regulating the growth and progression of Ewing's sarcoma (ES). To identify possible oncogenic factors in ES, we used a microarray-based approach to profile the changes in the expression of miRNAs and the downstream mRNAs in five ES cell lines. One miRNA, miR‑138, was significantly downregulated, whereas the expression of focal adhesion kinase (FAK) was significantly upregulated in all tested ES cells. When miR‑138 was transfected into ES cell lines, the expression of FAK in these cells was greatly suppressed and inhibited the proliferation and mobility of ES cells. Overexpression of miR‑138 in vitro resulted in further inhibition of the cell cycle at the G1 phase and in the induction of anoikis, in a dose- and time-dependent manner. Moreover, miR‑138 overexpression in ES cells significantly suppressed the number of distant metastases in vivo. The data in the present study demonstrates for the first time a novel mechanism that regulates the expression of FAK via miR‑138 in ES cells.
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Affiliation(s)
- Kazuhiro Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Masanori Kawano
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Ichiro Itonaga
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Tatsuya Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Masashi Miyazaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Shinichi Ikeda
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
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14
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Abstract
Abstract
Alopecia impairs the physical and mental health of patients. We have previously shown that 8-week-old ob/ob mice have no reactivity to depilation, which is a stimulus that induces anagen transition in normal mice, while no hair cycle abnormalities have been reported in other studies until mice reach 7 weeks of age. Therefore, we hypothesized that ob/ob mice have abnormalities in hair cycle progression beyond 7 weeks of age. We examined 6- to 24-week-old ob/ob and 6- to 10-week-old normal mice. After acclimation, the dorsal skin was harvested and the hair cycle phase was identified histologically and immunohistochemically. Normal mice showed catagen–telogen and telogen–anagen transitions at 6 and 8–9 weeks old, respectively. In contrast, the anagen–catagen transition was observed in 7-week-old mice and the telogen phase was maintained from 10 to 24 weeks in most ob/ob mice. These results suggests that ob/ob mice are a possible model animal for telogen effluvium.
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Affiliation(s)
- Natsumi Tasaki
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takeo Minematsu
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yuko Mugita
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shin-ichi Ikeda
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Gojiro Nakagami
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hiromi Sanada
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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15
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Kawano M, Tanaka K, Itonaga I, Ikeda S, Iwasaki T, Tsumura H. microRNA-93 promotes cell proliferation via targeting of PTEN in Osteosarcoma cells. J Exp Clin Cancer Res 2015; 34:76. [PMID: 26243299 PMCID: PMC4524362 DOI: 10.1186/s13046-015-0192-z] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 07/17/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Aberrant microRNA (miRNA) expression plays an essential role in osteosarcoma (OS) pathogenesis. Recent studies have shown that dysregulation of miRNA expression is associated with increased tumorigenesis and poor prognosis in several types of cancers, including OS. The aim of this study was to investigate the relevant microRNAs involved in the development of OS. METHODS To explore possible oncogenic factors in OS, we used a microarray-based approach to profile changes in the expression of miRNAs and their target mRNAs in five OS cell lines and human mesenchymal stem cells (hMSCs). An miRNA, miR-93, was significantly up-regulated, whereas phosphatase and tensin homologue (PTEN) expression was significantly down-regulated in all tested OS cells, when compared with hMSCs. RESULTS When anti-miR-93 was transfected into OS cell lines, PTEN expression was greatly increased, suggesting that PTEN might be a target of miR-93 in ES cells. The expression of phosphorylated Akt protein, which is known to be inversely correlated with that of PTEN, was significantly down-regulated in anti-miR-93-transfected cells. Furthermore, transfection of anti-miR-93 inhibited the proliferation and cell cycle progression of ES cells. In addition, the down-regulation of miR-93 in these cells significantly suppressed tumor growth in vivo. CONCLUSION Ectopic expression of miR-93 decreased PTEN protein levels. Furthermore, miR-93 increased proliferation and decreased apoptosis in OS cells, whereas its silencing in these cells inhibited such carcinogenic processes. Taking these observations together, miR-93 can be seen to play a critical role in carcinogenesis through suppression of PTEN, and may serve as a therapeutic target for the treatment of OS.
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Affiliation(s)
- Masanori Kawano
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, 879-5593, Japan.
| | - Kazuhiro Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, 879-5593, Japan.
| | - Ichiro Itonaga
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, 879-5593, Japan.
| | - Shinichi Ikeda
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, 879-5593, Japan.
| | - Tatsuya Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, 879-5593, Japan.
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita, 879-5593, Japan.
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16
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Kawano M, Tanaka K, Itonaga I, Iwasaki T, Miyazaki M, Ikeda S, Tsumura H. Dendritic cells combined with anti-GITR antibody produce antitumor effects in osteosarcoma. Oncol Rep 2015; 34:1995-2001. [PMID: 26239052 DOI: 10.3892/or.2015.4161] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 06/02/2015] [Indexed: 11/06/2022] Open
Abstract
We attempted to enhance the antitumor effects of tumor lysate-pulsed dendritic cells by eliminating regulatory T cells. The combinatorial effects of dendritic cells and agonist anti-glucocorticoid-induced tumor necrosis factor receptor (anti-GITR) antibodies were investigated with respect to enhancement of the systemic immune response, elimination of regulatory T cells, and inhibition of tumor growth. To determine whether the combination of dendritic cells and anti‑GITR antibodies could enhance systemic immune responses and inhibit primary tumor growth in a murine osteosarcoma (LM8) model. We established the following 4 groups of C3H mice (20 mice in total): i), control IgG-treated mice; ii), tumor lysate-pulsed dendritic cell‑treated mice; iii), agonist anti-GITR antibody-treated mice; and iv), agonist anti-GITR antibody- and tumor lysate-pulsed dendritic cell‑treated mice.The mice that received the agonist anti-GITR antibodies and tumor lysate-pulsed dendritic cells displayed inhibited primary growth, prolonged life time, reduced numbers of regulatory T lymphocytes in the spleen, elevated serum interferon-γ levels, increased number of CD8+ T lymphocytes. The mice that received combined therapy had reduced level of immunosuppressive cytokines in tumor tissue and serum. Combining agonist anti-GITR antibodies with tumor lysate-pulsed dendritic cells enhanced the systemic immune response. These findings provide further support for the continued development of agonist anti-GITR antibodies as an immunotherapeutic strategy for osteosarcoma. We suggest that our proposed immunotherapy could be developed further to improve osteosarcoma treatment.
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Affiliation(s)
- Masanori Kawano
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Kazuhiro Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Ichiro Itonaga
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Tatsuya Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Masashi Miyazaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Shinichi Ikeda
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
| | - Hiroshi Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
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Nakagami G, Minematsu T, Morohoshi T, Yamane T, Kanazawa T, Huang L, Asada M, Nagase T, Ikeda SI, Ikeda T, Sanada H. Pseudomonas aeruginosa quorum-sensing signaling molecule N-3-oxododecanoyl homoserine lactone induces matrix metalloproteinase 9 expression via the AP1 pathway in rat fibroblasts. Biosci Biotechnol Biochem 2015; 79:1719-24. [PMID: 26096293 DOI: 10.1080/09168451.2015.1056509] [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] [Indexed: 12/23/2022]
Abstract
Quorum sensing is a cell-to-cell communication mechanism, which is responsible for regulating a number of bacterial virulence factors and biofilm maturation and therefore plays an important role for establishing wound infection. Quorum-sensing signals may induce inflammation and predispose wounds to infection by Pseudomonas aeruginosa; however, the interaction has not been well investigated. We examined the effects of the P. aeruginosa las quorum-sensing signal, N-3-oxo-dodecanoyl homoserine lactone (3OC12-HSL), on matrix metalloproteinase (MMP) 9 expression in Rat-1 fibroblasts. 3OC12-HSL upregulated the expression of the MMP9 gene bearing an activator protein-1 (AP-1) binding site in the promoter region. We further investigated the mechanism underlying this effect. c-Fos gene expression increased rapidly after exposure to 3OC12-HSL, and nuclear translocation of c-Fos protein was observed; both effects were reduced by pretreatment with an AP-1 inhibitor. These results suggest that 3OC12-HSL can alter MMP9 gene expression in fibroblasts via the AP-1 signaling pathway.
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Affiliation(s)
- Gojiro Nakagami
- a Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine , The University of Tokyo , Tokyo , Japan
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18
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Kawaguchi M, Tamura Y, Kakehi S, Takeno K, Sakurai Y, Watanabe T, Funayama T, Sato F, Ikeda S, Ogura Y, Saga N, Naito H, Fujitani Y, Kanazawa A, Kawamori R, Watada H. Association between expression of FABPpm in skeletal muscle and insulin sensitivity in intramyocellular lipid-accumulated nonobese men. J Clin Endocrinol Metab 2014; 99:3343-52. [PMID: 24937540 DOI: 10.1210/jc.2014-1896] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
CONTEXT Intramyocellular lipid (IMCL) accumulation is observed in both insulin-resistant subjects and insulin-sensitive endurance athletes (athlete's paradox). We hypothesized that the expression pattern of fatty acid transporters may influence oxidative capacity and determine the association between IMCL and insulin resistance. OBJECTIVE The objective of the study was to investigate the muscle expression of fatty acid transporters and their function related to insulin sensitivity in IMCL-accumulated subjects. DESIGN AND SETTING The study subjects were 36 nonobese healthy men. Their IMCL levels were measured by (1)H-magnetic resonance spectroscopy, and their insulin sensitivity was evaluated by steady-state glucose infusion rate (GIR) during a euglycemic-hyperinsulinemic clamp. Gene expression levels in the vastus lateralis were evaluated by quantitative RT-PCR. We compared the clinical phenotypes and the expression levels of genes involved in lipid metabolism in skeletal muscle between IMCL-accumulated high-GIR (H-GIR) subjects (n = 8) and low-GIR subjects (n = 9). The functions of candidate fatty acid transporters were determined by in vitro analyses. RESULTS Compared with the low-GIR group, body fat was lower and maximum oxygen uptake was higher in the H-GIR group. Several lipid oxidation genes in muscle were up-regulated in the H-GIR group, and this was associated with increased expression of higher plasma membrane-associated fatty acid-binding protein (FABPpm) and decreased expression of fatty acid transport protein (FATP)-1. Overexpression of FABPpm in C2C12 myotubes increased fatty acid oxidation coupled with the elevated expression of genes related to fatty acid oxidation. These changes were not observed in FATP1-overexpressed myotubes. CONCLUSIONS Differences in the gene expression of fatty acid transporters may, at least in part, affect insulin sensitivity in IMCL-accumulated nonobese men.
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Affiliation(s)
- Minako Kawaguchi
- Department of Metabolism and Endocrinology (M.K., Y.T., S.K., K.T., Y.S., T.W., T.F., F.S., S.I., Y.F., A.K., R.K., H.W.), Sportology Center (Y.T., S.K., S.I., R.K., H.W.), Center for Therapeutic Innovations in Diabetes (H.W.), and Center for Molecular Diabetology (H.W.), Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; and Institute of Health and Sports Science and Medicine (Y.O., N.S., H.N.) and Department of Exercise Physiology (Y.O., N.S., H.N.), Juntendo University Graduate School of Health and Sports Science, Chiba 270-1695, Japan
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Sakurai Y, Tamura Y, Takeno K, Kumashiro N, Sato F, Kakehi S, Ikeda S, Ogura Y, Saga N, Naito H, Katamoto S, Fujitani Y, Hirose T, Kawamori R, Watada H. Determinants of intramyocellular lipid accumulation after dietary fat loading in non-obese men. J Diabetes Investig 2014; 2:310-7. [PMID: 24843504 PMCID: PMC4014973 DOI: 10.1111/j.2040-1124.2010.00091.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Aims/Introduction: Accumulation of intramyocellular lipid (IMCL) is associated with insulin resistance. However, the factors affecting the change in IMCL remain to be elucidated. The aim of the present study was to determine the factors that influence the change in IMCL level after high‐fat loading. Materials and Methods: The study subjects were 37 non‐obese men. Each subject consumed a high‐fat diet for 3 days after a normal‐fat diet for 3 days. After each diet program, IMCL levels in the tibialis anterior (TA‐IMCL) and soleus (SOL‐IMCL) were measured by proton magnetic resonance spectroscopy. Glucose infusion rate (GIR) was evaluated by euglycemic hyperinsulinemic clamp as an index of peripheral insulin sensitivity. Results: The high‐fat diet significantly increased TA‐IMCL and SOL‐IMCL by ∼30 and ∼20%, respectively (P < 0.05), whereas it did not significantly alter GIR. The increase in SOL‐IMCL, but not in TA‐IMCL, negatively correlated with serum high molecular weight (HMW)‐adiponectin (r = −0.36, P < 0.05) and HMW‐/total‐adiponectin ratio (r = −0.46, P < 0.05). Although high‐fat diet‐related changes in SOL‐IMCL showed high inter‐individual variations, in subjects doing exercise, changes in SOL‐IMCL (r = 0.55, P < 0.05) and TA‐IMCL (r = 0.61, P < 0.05) positively correlated with daily physical activity level. In contrast, in sedentary subjects, changes in SOL‐IMCL (r = −0.50, P < 0.01) and TA‐IMCL (r = −0.48, P < 0.05) negatively correlated with daily physical activity. Conclusions: HMW‐adiponectin and daily physical activity are determinants of IMCL accumulation by a high‐fat diet. Intriguingly, the effect of daily physical activity on the change in IMCL depends on the level of regular exercise. (J Diabetes Invest,doi: 10.1111/j.2040‐1124.2010.00091.x, 2011)
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Affiliation(s)
- Yuko Sakurai
- Department of Medicine, Metabolism and Endocrinology
| | - Yoshifumi Tamura
- Department of Medicine, Metabolism and Endocrinology ; Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo
| | | | | | - Fumihiko Sato
- Department of Medicine, Metabolism and Endocrinology
| | - Saori Kakehi
- Department of Medicine, Metabolism and Endocrinology ; Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo
| | - Shinichi Ikeda
- Department of Medicine, Metabolism and Endocrinology ; Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo
| | - Yuji Ogura
- Institute of Health and Sports Science and Medicine ; Department of Exercise Physiology, Graduate School of Health and Sports Science, Juntendo University, Chiba
| | - Norio Saga
- Institute of Health and Sports Science and Medicine ; Department of Exercise Physiology, Graduate School of Health and Sports Science, Juntendo University, Chiba
| | - Hisashi Naito
- Institute of Health and Sports Science and Medicine ; Department of Exercise Physiology, Graduate School of Health and Sports Science, Juntendo University, Chiba
| | - Shizuo Katamoto
- Institute of Health and Sports Science and Medicine ; Department of Exercise Physiology, Graduate School of Health and Sports Science, Juntendo University, Chiba
| | | | | | - Ryuzo Kawamori
- Department of Medicine, Metabolism and Endocrinology ; Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo ; Center for Therapeutic Innovations in Diabetes ; Center for Beta Cell Biology and Regeneration, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Hirotaka Watada
- Department of Medicine, Metabolism and Endocrinology ; Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo
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Ikeda SI, Tamura Y, Kakehi S, Takeno K, Kawaguchi M, Watanabe T, Sato F, Ogihara T, Kanazawa A, Fujitani Y, Kawamori R, Watada H. Exercise-induced enhancement of insulin sensitivity is associated with accumulation of M2-polarized macrophages in mouse skeletal muscle. Biochem Biophys Res Commun 2013; 441:36-41. [DOI: 10.1016/j.bbrc.2013.10.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 10/03/2013] [Indexed: 12/17/2022]
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21
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Ambe-Suzuki K, Ohyama Y, Shirai N, Ikeda SI. Nickel/Zinc Chloride-Promoted Domino Reaction of Enynes and Enones Including Unstrained CC Bond Cleavage. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100770] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Inoue S, Yamamoto I, Ikeda S, Kawaguchi M, Kawakami T, Kirita T, Furuya H. Possible difficult laryngoscopy caused by masticatory muscle tendon-aponeurosis hyperplasia: we anesthesiologists should be aware of this disease. J Anesth 2010; 24:930-1. [PMID: 20721609 DOI: 10.1007/s00540-010-1010-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 07/28/2010] [Indexed: 11/26/2022]
Abstract
Masticatory muscle tendon-aponeurosis hyperplasia (MMTAH) is a new disease entity characterized by limited mouth opening due to contracture of the masticatory muscles resulting from hyperplasia of tendons and aponeuroses. The other clinical feature is that the face of the patient with this disease displays a square mandible configuration. Muscle relaxants provide no relief for the limited mouth-opening ability. Anesthesiologists need to suspect difficult airway when patients have limited mouth opening with square mandible configuration. MMTAH can therefore be a possible cause of difficult intubation.
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Affiliation(s)
- Satoki Inoue
- Department of Anesthesiology, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara 634-8522, Japan.
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Hisamatsu Y, Shirai N, Ikeda SI, Odashima K. A New Quadruple Hydrogen-Bonding Module Based on Five-Membered Heterocyclic Urea Structure. Org Lett 2010; 12:1776-9. [PMID: 20232854 DOI: 10.1021/ol100385b] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yosuke Hisamatsu
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Naohiro Shirai
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Shin-ichi Ikeda
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Kazunori Odashima
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
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24
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Hirohata M, Yoshita M, Ishida C, Ikeda SI, Tamaoka A, Kuzuhara S, Shoji M, Ando Y, Tokuda T, Yamada M. Clinical features of non-hypertensive lobar intracerebral hemorrhage related to cerebral amyloid angiopathy. Eur J Neurol 2010; 17:823-9. [PMID: 20158508 DOI: 10.1111/j.1468-1331.2009.02940.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE The present study aims to clarify the clinical features of non-hypertensive cerebral amyloid angiopathy-related lobar intracerebral hemorrhage (CAA-L-ICH). METHODS We investigated clinical, laboratory, and neuroimaging findings in 41 patients (30, women; 11, men) with pathologically supported CAA-L-ICH from 303 non-hypertensive Japanese patients aged >OR=55, identified via a nationwide survey as symptomatic CAA-L-ICH. RESULTS The mean age of patients at onset of CAA-L-ICH was 73.2 +/- 7.4 years; the number of patients increased with age. The corrected female-to-male ratio for the population was 2.2, with significant female predominance. At onset, 7.3% of patients received anti-platelet therapy. In brain imaging studies, the actual frequency of CAA-L-ICHs was higher in the frontal and parietal lobes; however, after correcting for the estimated cortical volume, the parietal lobe was found to be the most frequently affected. CAA-L-ICH recurred in 31.7% of patients during the average 35.3-month follow-up period. The mean interval between intracerebral hemorrhages (ICHs) was 11.3 months. The case fatality rate was 12.2% at 1 month and 19.5% at 12 months after initial ICH. In 97.1% of patients, neurosurgical procedures were performed without uncontrollable intraoperative or post-operative hemorrhage. CONCLUSIONS Our study revealed the clinical features of non-hypertensive CAA-L-ICH, including its parietal predilection, which will require further study with a larger number of patients with different ethnic backgrounds.
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Affiliation(s)
- M Hirohata
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
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25
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Hisamatsu Y, Shirai N, Ikeda SI, Odashima K. A New Quadruple Hydrogen-Bonding Module with a DDAA Array: Formation of a Stable Homodimer without Competition from Undesired Hydrogen-Bonded Dimers. Org Lett 2009; 11:4342-5. [DOI: 10.1021/ol9017084] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yosuke Hisamatsu
- Sagami Chemical Research Center, Hayakawa, Ayase 252-1193, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Naohiro Shirai
- Sagami Chemical Research Center, Hayakawa, Ayase 252-1193, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Shin-ichi Ikeda
- Sagami Chemical Research Center, Hayakawa, Ayase 252-1193, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Kazunori Odashima
- Sagami Chemical Research Center, Hayakawa, Ayase 252-1193, Japan, and Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
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26
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Ikeda SI, Obara H, Tsuchida E, Shirai N, Odashima K. Nickel-Catalyzed Coupling of Alkyne-Tethered Vinylcyclopropanes and Allyl Chloride. Organometallics 2008. [DOI: 10.1021/om7012524] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shin-ichi Ikeda
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Hitomi Obara
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Eriko Tsuchida
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Naohiro Shirai
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Kazunori Odashima
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
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27
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Hisamatsu Y, Fukumi Y, Shirai N, Ikeda SI, Odashima K. Five-membered heterocyclic ureas suitable for the donor–donor–acceptor hydrogen-bonding modules. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.01.068] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ikeda SI, Kizaki T, Haga S, Ohno H, Takemasa T. Acute exercise induces biphasic increase in respiratory mRNA in skeletal muscle. Biochem Biophys Res Commun 2008; 368:323-8. [PMID: 18249186 DOI: 10.1016/j.bbrc.2008.01.095] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Accepted: 01/16/2008] [Indexed: 12/15/2022]
Abstract
Peroxisome proliferator-activated receptor gamma coactivator-1alpha (PGC-1alpha) promotes the expression of oxidative enzymes in skeletal muscle. We hypothesized that activation of the p38 MAPK (mitogen-activated protein kinase) in response to exercise was associated with exercise-induced PGC-1alpha and respiratory enzymes expression and aimed to demonstrate this under the physiological level. We subjected mice to a single bout of treadmill running and found that the exercise induced a biphasic increase in the expression of respiratory enzymes mRNA. The second phase of the increase was accompanied by an increase in PGC-1alpha protein, but the other was not. Administration of SB203580 (SB), an inhibitor of p38 MAPK, suppressed the increase in PGC-1alpha expression and respiratory enzymes mRNA in both phases. These data suggest that p38 MAPK is associated with the exercise-induced expression of PGC-1alpha and biphasic increase in respiratory enzyme mRNAs in mouse skeletal muscle under physiological conditions.
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Affiliation(s)
- Shin-ichi Ikeda
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8574, Japan
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Iwaya K, Satow S, Hanaguri T, Shannon N, Yoshida Y, Ikeda SI, He JP, Kaneko Y, Tokura Y, Yamada T, Takagi H. Local tunneling spectroscopy across a metamagnetic critical point in the bilayer ruthenate Sr3Ru2O7. Phys Rev Lett 2007; 99:057208. [PMID: 17930789 DOI: 10.1103/physrevlett.99.057208] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Indexed: 05/25/2023]
Abstract
The local spectroscopic signatures of metamagnetic criticality in Sr(3)Ru(2)O(7) were explored using scanning tunneling microscopy (STM). Singular features in the tunneling spectrum were found close to the Fermi level, as would be expected in a Stoner picture of itinerant electron metamagnetism. These features showed a pronounced magnetic field dependence across the metamagnetic critical point, which cannot be understood in terms of a naive Stoner theory. In addition, a pseudogap structure was observed over several tens of meV, accompanied by a c(2 x 2) superstructure in STM images. This result represents a new electronic ordering at the surface in the absence of any measurable surface reconstruction.
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Affiliation(s)
- K Iwaya
- RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
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Abstract
The Ni-catalyzed coupling of allyl chlorides and enynes has been developed; the cyclization of enynes was triggered by the addition of pi-allylnickel species to the alkyne part, followed by the incorporation of the alkene part.
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Affiliation(s)
- Shin-ichi Ikeda
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Nagoya, 467-8603, Japan
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Saijo R, Tsunekawa S, Murakami H, Shirai N, Ikeda SI, Odashima K. Dopamine-selective potentiometric responses by new ditopic sensory elements based on a hexahomotrioxacalix[3]arene. Bioorg Med Chem Lett 2007; 17:767-71. [PMID: 17112724 DOI: 10.1016/j.bmcl.2006.10.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2006] [Revised: 10/18/2006] [Accepted: 10/25/2006] [Indexed: 11/29/2022]
Abstract
New ditopic sensory elements 2 and 3 for catecholamines based on a hexahomotrioxacalix[3]arene, with a boronic acid substituent appended, were designed and synthesized. As an interesting mode of molecular recognition at membrane surfaces, the host, when incorporated into poly(vinyl chloride) (PVC) liquid membranes, displayed excellent potentiometric selectivity for dopamine over other catecholamines (noradrenaline and adrenaline) and inorganic cations (Na+, K+, and NH4+).
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Affiliation(s)
- Ryosuke Saijo
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Mizuho-ku, Nagoya 467-8603, Japan
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Kim BJ, Yu J, Koh H, Nagai I, Ikeda SI, Oh SJ, Kim C. Missing xy-band Fermi surface in 4d transition-metal oxide Sr2RhO4: effect of the octahedra rotation on the electronic structure. Phys Rev Lett 2006; 97:106401. [PMID: 17025832 DOI: 10.1103/physrevlett.97.106401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Indexed: 05/12/2023]
Abstract
Electronic structures of the 4d transition-metal oxide compound Sr2RhO4 are investigated by angle-resolved photoemission spectroscopy and density-functional electronic structure calculations. In the measured Fermi surfaces (FS) of Sr2RhO4, the xy-band FS sheet expected from the well-established results of the FS of Sr2RuO4 is missing, the volume of which should be different only by one additional electron for Sr2RhO4. The apparent contradiction is resolved by a careful analysis of the band structure where the rotation of octahedra results in the hybridization of e(g) and t(2g) states and thus plays a key role in the determination of the electronic structure near EF. The modification of the FS structure due to the distorted lattice is related to the charge transfer among the orbital states and suggested to be relevant to the metal-insulator transition in Ca(2-x)Sr(x)RuO4.
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Affiliation(s)
- B J Kim
- School of Physics and Center for Strongly Correlated Materials Research, Seoul National University, Seoul, Korea
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Abstract
Catalytic cycloisomerization of enynes has been accomplished in the presence of an Ni0-PPh3-Zn-carboxylic acid or -ZnCl2 system. A nickel(I)-hydride complex, thought to be generated by reduction of the protonated nickel(II) complex with Zn, is proposed as the catalytic species. This cycloisomerization shows reactivity behavior that is different from that of a conventional metal-catalyzed reaction. In particular, in the reaction with (E)-enynes, the catalytic system has a selectivity that favors the formation of the 1,3-diene over the 1,4-diene. In addition, this catalytic system has been applied to the domino cyclization of dienynes for the construction of tricyclic compounds.
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Affiliation(s)
- Shin-ichi Ikeda
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan.
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Ikeda S, Tsumura H, Torisu T. Age-related quadriceps-dominant muscle atrophy and incident radiographic knee osteoarthritis. J Orthop Sci 2006; 10:121-6. [PMID: 15815857 DOI: 10.1007/s00776-004-0876-2] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2004] [Accepted: 12/10/2004] [Indexed: 02/09/2023]
Abstract
Muscle atrophy is common in the elderly. However, the etiologic role of muscle atrophy associated with osteoarthritis of the knee has not been studied in detail. We assessed the association between age-related muscle atrophy around the knee joint and incident radiographic osteoarthritis of the knee. Twenty-one women in their thirties and 17 women in their sixties participated. They had no history, symptoms, or objective findings of any knee problems, and none of the participants was limited in performing daily activities. Radiographs of the knee joint were graded for the presence of osteoarthritis, and the cross-sectional imaging around the knee joint was carried out using computed tomography. Incident radiographic osteoarthritis was observed in 6 of the 17 women in their sixties. Quadriceps-dominant muscle atrophy was marked in the elderly women with radiographic osteoarthritis. In a multivariate analysis, the risk of incident radiographic osteoarthritis of the knee was significantly increased among women with a higher hamstrings/quadriceps cross-sectional area ratio. The results suggest the possibility that age-related quadriceps-dominant muscle atrophy may play a role in the pathogenesis of osteoarthritis of the knee.
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Affiliation(s)
- Shinichi Ikeda
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Oita-gun, Oita, 879-5593, Japan
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Tsumura H, Kaku N, Ikeda S, Torisu T. A computer simulation of rotational acetabular osteotomy for dysplastic hip joint: does the optimal transposition of the acetabular fragment exist? J Orthop Sci 2006; 10:145-51. [PMID: 15815861 DOI: 10.1007/s00776-004-0866-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2004] [Accepted: 11/22/2004] [Indexed: 02/09/2023]
Abstract
For young patients who have early signs of coxarthrosis resulting from acetabular dysplasia, periacetabular osteotomies for correcting abnormal stress distribution can be useful for preventing the progression of the disease. However, it is difficult to confirm the optimal transposition of the osteotomized acetabular fragment. To deal with this problem, we devised a computer program to support preoperative planning. Hip images obtained by computed tomography were loaded into our program, and a three-dimensional voxel model was created. Then, osteotomy was simulated and the pressure distribution was analyzed with a rigid-body spring analysis (computational nonlinear mechanical analysis). The three-dimensional pressure distributions in seven dysplastic hips were evaluated before and after virtual rotational acetabular osteotomy. A peak pressure was calculated for every 5 degrees of rotation of the acetabular fragment. The peak pressure decreased gradually and increased again afterward, indicating the optimal transposition of the acetabular fragment. The postoperative peak pressure decreased to about 40% in the most improved case. This program allows the hip joint mechanics to be evaluated easily so that the advantages and disadvantages of various surgical methods can be examined biomechanically prior to surgery.
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Affiliation(s)
- Hiroshi Tsumura
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Oita-gun, Oita, 879-5593, Japan
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Ikeda S. [Project on disease-related proteomics and a proteome factory for drug innovation]. Rinsho Byori 2005; 53:246-52. [PMID: 15839055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The proteome is expected to be thoroughly researched in Post Genome Projects following the completion of the Human Genome Sequencing Project. Many research projects to investigate disease-related proteins are being undertaken worldwide. Analysis of the proteome, which has an intimate involvement in biogenics, should provide a breakthrough in vital activity and provide substantial clues for new treatments, diagnoses and new target of drugs. In the 2003 fiscal year, The Ministry of Health, Labour and Welfare (MHLW) started the Health, Labour and Welfare Scientific Research Founding Program "Disease Related Proteomics". At the time, the Japan Health Sciences Foundation was delegated the project from MHLW, along with the Japan Pharmaceutical Manufactures Association, and established a consortium with 22 pharmaceutical companies for this project, collaborating with the National Institute of Health Science to start the Project on Disease Related Proteomics and a Proteome Factory for Drug Innovation. In this report, the project overview and its facilities will be introduced.
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Affiliation(s)
- Shinichi Ikeda
- Japan Health Sciences Foundation, Chuo-ku, Tokyo 103-0001
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Tsumura H, Ikeda S, Ono T, Itonaga I, Taira H, Torisu T. Synovectomy, debridement, and continuous irrigation for infected total knee arthroplasty. Int Orthop 2005; 29:113-6. [PMID: 15685455 PMCID: PMC3474505 DOI: 10.1007/s00264-004-0626-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Accepted: 11/16/2004] [Indexed: 10/25/2022]
Abstract
Since 1990, a total of ten joints in nine patients with infected total knee arthroplasty have been treated in our department within 21 days of the onset of infection. Their radiographs showed no evidence of implant loosening or "moth-eaten" appearance. They underwent synovectomy, debridement, and continuous irrigation without implant removal. Continuous irrigation was maintained for 7-29 days. It was possible to retain implants in eight joints of seven patients. Two joints of two patients were removed. Pain disappeared in all eight joints in which the implants were retained. Four patients could walk with one cane; one patient could walk with one crutch. Range of motion in five joints remained over 100 degrees. We recommend synovectomy, debridement, and continuous irrigation to cure an early stage infection of total knee arthroplasty.
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Affiliation(s)
- Hiroshi Tsumura
- Department of Orthopedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Oita, 879-5593, Japan.
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Matsuhata H, Nagai I, Yoshida Y, Hara S, Ikeda SI, Shirakawa N. Crystal structure of Sr3Ir2O7 investigated by transmission electron microscopy. J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2004.06.056] [Citation(s) in RCA: 24] [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] [Indexed: 11/30/2022]
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Aiura Y, Yoshida Y, Hase I, Ikeda SI, Higashiguchi M, Cui XY, Shimada K, Namatame H, Taniguchi M, Bando H. Kink in the dispersion of layered strontium ruthenates. Phys Rev Lett 2004; 93:117005. [PMID: 15447372 DOI: 10.1103/physrevlett.93.117005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2004] [Indexed: 05/24/2023]
Abstract
We present detailed energy dispersions near the Fermi level along the high symmetry line GammaX on the monolayer and bilayer strontium ruthenates Sr2RuO4 and Sr3Ru2O7, determined by high-resolution angle-resolved photoemission spectroscopy. A kink in the dispersion is clearly shown for the both ruthenates. The energy position of the kink and the slope in the low-energy part near the Fermi level are almost identical between them, whereas the dispersion in the high-energy part varies, like the behavior of the kink for the cuprate superconductors.
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Affiliation(s)
- Y Aiura
- National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan.
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Ikeda SI, Sanuki R, Miyachi H, Miyashita H, Taniguchi M, Odashima K. Ni-Catalyzed, ZnCl2-Assisted Domino Coupling of Enones, Alkynes, and Alkenes. J Am Chem Soc 2004; 126:10331-8. [PMID: 15315447 DOI: 10.1021/ja047580a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Ni(0)/ZnCl(2) system effectively promotes the coupling of enones and alkene-tethered alkynes. In the reaction with 1,6-enynes, the oxidative cyclization of Ni(0) species on enones across the alkyne part followed by ZnCl(2)-promoted cleavage generates alkenylnickel intermediates. Subsequent migratory insertion of the tethered alkene occurs with 5-exo-cyclization. When the resulting sigma-alkylnickel intermediates have beta-hydrogen atoms, the reaction terminates by beta-hydrogen elimination to provide cyclopentane derivatives. On the other hand, a sigma-alkylnickel intermediate that does not have beta-hydrogen atoms undergoes the insertion of a second alkene unit to cause a domino effect via a three-fold C-C bond formation process with and without the cleavage of one C-C bond.
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Affiliation(s)
- Shin-ichi Ikeda
- Contribution from the Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
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Ikeda SI. Nickel-katalysierte Kupplung von Carbonylverbindungen mit Alkinen oder 1,3-Dienen zu Allyl-, Homoallyl- und Bishomoallylalkoholen. Angew Chem Int Ed Engl 2003. [DOI: 10.1002/ange.200301673] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ikeda SI, Kondo H, Arii T, Odashima K. Catalytic enantioselective intermolecular [2 + 2 + 2] cycloaddition of an alkene and two alkynes. Chem Commun (Camb) 2002:2422-3. [PMID: 12430471 DOI: 10.1039/b208313b] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalytic enantioselective intermolecular [2 + 2 + 2] cycloaddition of one molecule of alkene (enone) and two molecules of alkyne was developed in the presence of a nickel complex modified by chiral monodentate oxazoline ligands, which have not previously been used as chiral ligands for transition metals in asymmetric catalysts, and an aluminium phenoxide.
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Affiliation(s)
- Shin-ichi Ikeda
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan.
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Chatani N, Ikeda S, Ohe K, Murai S. Conversion of alkenes to enol silyl ethers of acylsilanes by iridium-catalyzed reaction with a hydrosilane and carbon monoxide. J Am Chem Soc 2002. [DOI: 10.1021/ja00050a089] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [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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Ikeda SI, Cui DM, Sato Y. Regio- and Stereoselective Synthesis of 3,6-Dien-1-ynes by Nickel-Catalyzed Coupling Reaction of Allyl Chlorides, 1-Alkynes, and Alkynyltins. J Org Chem 2002. [DOI: 10.1021/jo00102a001] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ikeda S, Chatani N, Kajikawa Y, Ohe K, Murai S. Regioselective incorporation of CO into enamines by rhodium-catalyzed reaction with a hydrosilane and CO. J Org Chem 2002. [DOI: 10.1021/jo00027a002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ikeda SI, Yamamoto H, Kondo K, Sato Y. Nickel-Catalyzed Tandem Coupling of Chlorotrimethylsilane, .alpha.,.beta.-Enones, Alkynes, and Dimethylzinc. Organometallics 2002. [DOI: 10.1021/om00011a018] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ikeda SI, Sato Y. Synthesis of Stereodefined Enynes by the Nickel-Catalyzed Coupling Reaction of Alkynyltins, Alkynes, and Enones. J Am Chem Soc 2002. [DOI: 10.1021/ja00092a061] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mitaka T, Sato F, Ikeda SI, Sugimoto SI, Higaki N, Hirata K, Lamers WH, Mochizuki Y. Expression of carbamoylphosphate synthetase I and glutamine synthetase in hepatic organoids reconstructed by rat small hepatocytes and hepatic nonparenchymal cells. Cell Tissue Res 2001; 306:467-71. [PMID: 11735048 DOI: 10.1007/s004410100465] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2000] [Accepted: 08/21/2001] [Indexed: 10/28/2022]
Abstract
The objective of this study was to investigate the expression of carbamoylphosphate synthetase I (CPS) and glutamine synthetase (GS) in small hepatocyte colonies and whether the heterogeneous expression of the enzymes could be induced during the maturation of small hepatocytes. Small hepatocytes isolated from an adult rat liver were cultured and proliferated to form colonies. The expression of CPS and GS was examined using immunocytochemistry and immunoblotting. In this culture more than 99% of morphologically hepatic cells were positive for CPS and all small hepatocytes were negative for GS at day 5. CPS-positive cells dramatically decreased with time in culture, whereas GS-positive ones appeared and their number increased in the colonies. Two to 3 weeks after plating, colonies with rising and piled-up cells appeared and the number of such colonies reached about 25% of all colonies at day 30. In most rising and piled-up cells in colonies both proteins were strongly expressed, whereas many small hepatocytes in monolayer colonies did not express either protein. When small hepatocytes in monolayer colonies were overlayed with Matrigel, the cells gradually piled up and both CPS and GS proteins were dramatically induced. The expression of CPS and GS in small hepatocytes may interact with the extracellular matrix because the rising and piled-up cells appear to be induced by the extracellular matrix produced by hepatic nonparenchymal cells.
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Affiliation(s)
- T Mitaka
- Department of Pathology, Cancer Research Institute, Sapporo Medical University School of Medicine, Chuo-ku, S-1, W-17, Sapporo 060-8556, Japan.
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