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Yoshimura N, Kariya R, Shimada M, Tateyama M, Matsunaga H, Shibata Y, Tanimura S, Takata K, Arima T, Kawakami J, Maeda K, Fukuma Y, Uragami M, Ideo K, Sugimoto K, Yonemitsu R, Matsushita K, Hisanaga S, Yugami M, Uehara Y, Masuda T, Nakamura T, Tokunaga T, Karasugi T, Sueyoshi T, Sato H, Iwakura Y, Araki K, Kobayashi E, Okada S, Miyamoto T. The IL-17-IL-17RA axis is required to promote osteosarcoma progression in mice. Sci Rep 2023; 13:21572. [PMID: 38062130 PMCID: PMC10703823 DOI: 10.1038/s41598-023-49016-1] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/03/2023] [Indexed: 12/18/2023] Open
Abstract
Osteosarcoma is rare but is the most common bone tumor. Diagnostic tools such as magnetic resonance imaging development of chemotherapeutic agents have increased the survival rate in osteosarcoma patients, although 5-year survival has plateaued at 70%. Thus, development of new treatment approaches is needed. Here, we report that IL-17, a proinflammatory cytokine, increases osteosarcoma mortality in a mouse model with AX osteosarcoma cells. AX cell transplantation into wild-type mice resulted in 100% mortality due to ectopic ossification and multi-organ metastasis. However, AX cell transplantation into IL-17-deficient mice significantly prolonged survival relative to controls. CD4-positive cells adjacent to osteosarcoma cells express IL-17, while osteosarcoma cells express the IL-17 receptor IL-17RA. Although AX cells can undergo osteoblast differentiation, as can patient osteosarcoma cells, IL-17 significantly inhibited that differentiation, indicating that IL-17 maintains AX cells in the undifferentiated state seen in malignant tumors. By contrast, IL-17RA-deficient mice transplanted with AX cells showed survival comparable to wild-type mice transplanted with AX cells. Biopsy specimens collected from osteosarcoma patients showed higher expression of IL-17RA compared to IL-17. These findings suggest that IL-17 is essential to maintain osteosarcoma cells in an undifferentiated state and could be a therapeutic target for suppressing tumorigenesis.
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Affiliation(s)
- Naoto Yoshimura
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Ryusho Kariya
- Laboratory of Molecular Cell Biology, School of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Koube, 650-8586, Japan
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Masaki Shimada
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Makoto Tateyama
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hideto Matsunaga
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuto Shibata
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Shuntaro Tanimura
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kosei Takata
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takahiro Arima
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Junki Kawakami
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kazuya Maeda
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuko Fukuma
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masaru Uragami
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Katsumasa Ideo
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kazuki Sugimoto
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Ryuji Yonemitsu
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kozo Matsushita
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Satoshi Hisanaga
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masaki Yugami
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yusuke Uehara
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tetsuro Masuda
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takayuki Nakamura
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takuya Tokunaga
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tatsuki Karasugi
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takanao Sueyoshi
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hiro Sato
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yoichiro Iwakura
- Division of Experimental Animal Immunology, Center for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-Shi, Chiba, 278-8510, Japan
| | - Kimi Araki
- Division of Developmental Genetics, Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
- Center for Metabolic Regulation of Healthy Aging, Kumamoto University, 1-1-1, Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Eisuke Kobayashi
- Division of Musculoskeletal Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Takeshi Miyamoto
- Department of Orthopedic Surgery, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
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Maeda K, Sugimoto K, Tasaki M, Taniwaki T, Arima T, Shibata Y, Tateyama M, Karasugi T, Sueyoshi T, Masuda T, Uehara Y, Tokunaga T, Hisanaga S, Yugami M, Yonemitsu R, Ideo K, Matsushita K, Fukuma Y, Uragami M, Kawakami J, Yoshimura N, Takata K, Shimada M, Tanimura S, Matsunaga H, Kai Y, Takata S, Kubo R, Tajiri R, Homma F, Tian X, Ueda M, Nakamura T, Miyamoto T. Transthyretin amyloid deposition in ligamentum flavum (LF) is significantly correlated with LF and epidural fat hypertrophy in patients with lumbar spinal stenosis. Sci Rep 2023; 13:20019. [PMID: 37973808 PMCID: PMC10654520 DOI: 10.1038/s41598-023-47282-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 11/11/2023] [Indexed: 11/19/2023] Open
Abstract
Lumbar spinal stenosis (LSS) is a degenerative disease characterized by intermittent claudication and numbness in the lower extremities. These symptoms are caused by the compression of nerve tissue in the lumbar spinal canal. Ligamentum flavum (LF) hypertrophy and spinal epidural lipomatosis in the spinal canal are known to contribute to stenosis of the spinal canal: however, detailed mechanisms underlying LSS are still not fully understood. Here, we show that surgically harvested LFs from LSS patients exhibited significantly increased thickness when transthyretin (TTR), the protein responsible for amyloidosis, was deposited in LFs, compared to those without TTR deposition. Multiple regression analysis, which considered age and BMI, revealed a significant association between LF hypertrophy and TTR deposition in LFs. Moreover, TTR deposition in LF was also significantly correlated with epidural fat (EF) thickness based on multiple regression analyses. Mesenchymal cell differentiation into adipocytes was significantly stimulated by TTR in vitro. These results suggest that TTR deposition in LFs is significantly associated with increased LF hypertrophy and EF thickness, and that TTR promotes adipogenesis of mesenchymal cells. Therapeutic agents to prevent TTR deposition in tissues are currently available or under development, and targeting TTR could be a potential therapeutic approach to inhibit LSS development and progression.
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Affiliation(s)
- Kazuya Maeda
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kazuki Sugimoto
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masayoshi Tasaki
- Department of Neurology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takuya Taniwaki
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takahiro Arima
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuto Shibata
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Makoto Tateyama
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tatsuki Karasugi
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takanao Sueyoshi
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Tetsuro Masuda
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yusuke Uehara
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takuya Tokunaga
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Satoshi Hisanaga
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masaki Yugami
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Ryuji Yonemitsu
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Katsumasa Ideo
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kozo Matsushita
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuko Fukuma
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masaru Uragami
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Junki Kawakami
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Naoto Yoshimura
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kosei Takata
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masaki Shimada
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Shuntaro Tanimura
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hideto Matsunaga
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yuki Kai
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Shu Takata
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Ryuta Kubo
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Rui Tajiri
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Fuka Homma
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, 35 Shinano-Machi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Xiao Tian
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Mitsuharu Ueda
- Department of Neurology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takayuki Nakamura
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takeshi Miyamoto
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
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3
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Kawakami J, Hisanaga S, Yoshimoto Y, Mashimo T, Kaneko T, Yoshimura N, Shimada M, Tateyama M, Matsunaga H, Shibata Y, Tanimura S, Takata K, Arima T, Maeda K, Fukuma Y, Uragami M, Ideo K, Sugimoto K, Yonemitsu R, Matsushita K, Yugami M, Uehara Y, Nakamura T, Tokunaga T, Karasugi T, Sueyoshi T, Shukunami C, Okamoto N, Masuda T, Miyamoto T. Remnant tissue enhances early postoperative biomechanical strength and infiltration of Scleraxis-positive cells within the grafted tendon in a rat anterior cruciate ligament reconstruction model. PLoS One 2023; 18:e0293944. [PMID: 37939095 PMCID: PMC10631660 DOI: 10.1371/journal.pone.0293944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/22/2023] [Indexed: 11/10/2023] Open
Abstract
When ruptured, ligaments and tendons have limited self-repair capacity and rarely heal spontaneously. In the knee, the Anterior Cruciate Ligament (ACL) often ruptures during sports activities, causing functional impairment and requiring surgery using tendon grafts. Patients with insufficient time to recover before resuming sports risk re-injury. To develop more effective treatment, it is necessary to define mechanisms underlying ligament repair. For this, animal models can be useful, but mice are too small to create an ACL reconstruction model. Thus, we developed a transgenic rat model using control elements of Scleraxis (Scx), a transcription factor essential for ligament and tendon development, to drive GFP expression in order to localize Scx-expressing cells. As anticipated, Tg rats exhibited Scx-GFP in ACL during developmental but not adult stages. Interestingly, when we transplanted the flexor digitorum longus (FDP) tendon derived from adult Scx-GFP+ rats into WT adults, Scx-GFP was not expressed in transplanted tendons. However, tendons transplanted from adult WT rats into Scx-GFP rats showed upregulated Scx expression in tendon, suggesting that Scx-GFP+ cells are mobilized from tissues outside the tendon. Importantly, at 4 weeks post-surgery, Scx-GFP-expressing cells were more frequent within the grafted tendon when an ACL remnant was preserved (P group) relative to when it was not (R group) (P vs R groups (both n = 5), p<0.05), and by 6 weeks, biomechanical strength of the transplanted tendon was significantly increased if the remnant was preserved (P vsR groups (both n = 14), p<0.05). Scx-GFP+ cells increased in remnant tissue after surgery, suggesting remnant tissue is a source of Scx+ cells in grafted tendons. We conclude that the novel Scx-GFP Tg rat is useful to monitor emergence of Scx-positive cells, which likely contribute to increased graft strength after ACL reconstruction.
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Affiliation(s)
- Junki Kawakami
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Satoshi Hisanaga
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Yuki Yoshimoto
- Department of Molecular Craniofacial Embryology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
- Department of Molecular Biology and Biochemistry, Basic Life Sciences, Graduate School of Biomedical and Health Sciences, Minami-ku, Hiroshima, Japan
| | - Tomoji Mashimo
- Division of Animal Genetics, Laboratory Animal Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Takehito Kaneko
- Graduate School of Science and Engineering, Iwate University, Morioka, Iwate, Japan
| | - Naoto Yoshimura
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Masaki Shimada
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Makoto Tateyama
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Hideto Matsunaga
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Yuto Shibata
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Shuntaro Tanimura
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Kosei Takata
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takahiro Arima
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Kazuya Maeda
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Yuko Fukuma
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Masaru Uragami
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Katsumasa Ideo
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Kazuki Sugimoto
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Ryuji Yonemitsu
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Kozo Matsushita
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Masaki Yugami
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Yusuke Uehara
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takayuki Nakamura
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takuya Tokunaga
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tatsuki Karasugi
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takanao Sueyoshi
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Basic Life Sciences, Graduate School of Biomedical and Health Sciences, Minami-ku, Hiroshima, Japan
| | - Nobukazu Okamoto
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tetsuro Masuda
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takeshi Miyamoto
- Faculty of Life Sciences, Department of Orthopaedic Surgery, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Orthopedic Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
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4
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Uragami M, Matsushita K, Shibata Y, Takata S, Karasugi T, Sueyoshi T, Masuda T, Nakamura T, Tokunaga T, Hisanaga S, Yugami M, Sugimoto K, Yonemitsu R, Ideo K, Fukuma Y, Takata K, Arima T, Kawakami J, Maeda K, Yoshimura N, Matsunaga H, Kai Y, Tanimura S, Shimada M, Tateyama M, Miyamoto K, Kubo R, Tajiri R, Tian X, Homma F, Morinaga J, Yamanouchi Y, Takebayashi M, Kajitani N, Uehara Y, Miyamoto T. A machine learning-based scoring system and ten factors associated with hip fracture occurrence in the elderly. Bone 2023; 176:116865. [PMID: 37562661 DOI: 10.1016/j.bone.2023.116865] [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: 07/04/2023] [Revised: 07/30/2023] [Accepted: 08/01/2023] [Indexed: 08/12/2023]
Abstract
Hip fractures are fragility fractures frequently seen in persons over 80-years-old. Although various factors, including decreased bone mineral density and a history of falls, are reported as hip fracture risks, few large-scale studies have confirmed their relevance to individuals older than 80, and tools to assess contributions of various risks to fracture development and the degree of risk are lacking. We recruited 1395 fresh hip fracture patients and 1075 controls without hip fractures and comprehensively evaluated various reported risk factors and their association with hip fracture development. We initially constructed a predictive model using Extreme Gradient Boosting (XGBoost), a machine learning algorithm, incorporating all 40 variables and evaluated the model's performance using the area under the receiver operating characteristic curve (AUC), yielding a value of 0.87. We also employed SHapley Additive exPlanation (SHAP) values to evaluate each feature importance and ranked the top 20. We then used a stepwise selection method to determine key factors sequentially until the AUC reached a plateau nearly equal to that of all variables and identified the top 10 sufficient to evaluate hip fracture risk. For each, we determined the cutoff value for hip fracture occurrence and calculated scores of each variable based on the respective feature importance. Individual scores were: serum 25(OH)D levels (<10 ng/ml, score 7), femoral neck T-score (<-3, score 5), Barthel index score (<100, score 3), maximal handgrip strength (<18 kg, score 3), GLFS-25 score (≥24, score 2), number of falls in previous 12 months (≥3, score 2), serum IGF-1 levels (<50 ng/ml, score 2), cups of tea/day (≥5, score -2), use of anti-osteoporosis drugs (yes, score -2), and BMI (<18.5 kg/m2, score 1). Using these scores, we performed receiver operating characteristic (ROC) analysis and the resultant optimal cutoff value was 7, with a specificity of 0.78, sensitivity of 0.75, and AUC of 0.85. These ten factors and the scoring system may represent tools useful to predict hip fracture.
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Affiliation(s)
- Masaru Uragami
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Kozo Matsushita
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yuto Shibata
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Shu Takata
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Tatsuki Karasugi
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Takanao Sueyoshi
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Tetsuro Masuda
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Takayuki Nakamura
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Takuya Tokunaga
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Satoshi Hisanaga
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Masaki Yugami
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Kazuki Sugimoto
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Ryuji Yonemitsu
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Katsumasa Ideo
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yuko Fukuma
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Kosei Takata
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Takahiro Arima
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Jyunki Kawakami
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Kazuya Maeda
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Naoto Yoshimura
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Hideto Matsunaga
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yuki Kai
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Shuntaro Tanimura
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Masaki Shimada
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Makoto Tateyama
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Kana Miyamoto
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Ryuta Kubo
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Rui Tajiri
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Xiao Tian
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Fuka Homma
- Department of Clinical Investigation, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, Kumamoto 860-8556, Japan
| | - Jun Morinaga
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, 35 Shinano-machi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yoshinori Yamanouchi
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, 35 Shinano-machi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Minoru Takebayashi
- Department of Neuropsychiatry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Naoto Kajitani
- Department of Neuropsychiatry, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan; Center for Metabolic Regulation of Healthy Aging, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yusuke Uehara
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan.
| | - Takeshi Miyamoto
- Department of Orthopedic Surgery, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan.
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Naniwa S, Yamada S, Awano K, Yoshida A, Takami K, Tagashira T, Tsuda S, Terashita D, Takada H, Akita T, Takata K, Kunigita T, Nishijo K. Impact of wall shear stress affected by anatomical difference between acute and chronic coronary syndrome in patients with LAD proximal disease. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1075] [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
Recent hemodynamic studies have demonstrated that progression of coronary atherosclerosis occurs at low wall share-stress site, whereas plaque rupture frequently occurs at high share stress site. It is well recognized that wall shear stress is relatively low along the outer walls of the bifurcation.
We investigated consecutive 140 patients (77 with acute coronary syndrome (ACS) and 63 with chronic coronary syndrome (CCS) performed PCI for LAD proximal lesions (AHA seg.6) from January 2016 to December 2019. In CCS group, entry criteria included stenosis of at least 90% in the LAD proximal lesion or at least 70% in the LAD proximal lesion and objective evidence of myocardial ischemia (inducible ischemia with either exercise or pharmacologic vasodilator stress or with pressure wire). Exclusion criteria were patients with maintenance dialysis, chronic total occlusion lesions, in-stent restenosis, and clinically diagnosed unstable angina without troponin I elevation. We measured the distance from LMT distal carina to the culprit site (Distance) and plaque location (Location) with intravascular ultrasound and angle between LMT and LAD with cardiovascular angiography analysis system (CAAS) (Angle).
The two groups were generally well balanced with regard to baseline clinical characteristics. The mean (±SD) age of the patients was 69.0±11.8 years, and 75% were men. Medication at baseline was also similar between two groups except higher prevalence of statin prescription in CCS group. The Distance was shorter and Angle was steeper in CCS group than in ACS group. The number of patients with Angle less than 150 degrees and with Location in the lateral wall side was much more in CCS group.
In this study, plaques in CCS were frequently observed at low shear stress site, whereas those in ACS at high shear stress site. Plaque progression in CCS may be associated with low wall shear stress, and high shear stress may play key role in plaque rupture in ACS. This anatomical difference can partly explain the different mechanisms of onset between of ACS and CCS.
Funding Acknowledgement
Type of funding sources: None. Anatomical differenceCharacteristics and results
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Affiliation(s)
- S Naniwa
- Kita-Harima Medical Centre, Ono, Japan
| | - S Yamada
- Kita-Harima Medical Centre, Ono, Japan
| | - K Awano
- Kita-Harima Medical Centre, Ono, Japan
| | - A Yoshida
- Kita-Harima Medical Centre, Ono, Japan
| | - K Takami
- Kita-Harima Medical Centre, Ono, Japan
| | | | - S Tsuda
- Kita-Harima Medical Centre, Ono, Japan
| | | | - H Takada
- Kita-Harima Medical Centre, Ono, Japan
| | - T Akita
- Kita-Harima Medical Centre, Ono, Japan
| | - K Takata
- Kita-Harima Medical Centre, Ono, Japan
| | | | - K Nishijo
- Kita-Harima Medical Centre, Ono, Japan
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Takata K, Matsumoto K, Hirai F. Hepatobiliary and Pancreatic: An intraperitoneal gallstone due to gallbladder perforation. J Gastroenterol Hepatol 2020; 35:362. [PMID: 31816661 DOI: 10.1111/jgh.14918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 10/31/2019] [Indexed: 12/09/2022]
Affiliation(s)
- K Takata
- Department of Gastroenterology and Medicine, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - K Matsumoto
- Department of Gastroenterology and Medicine, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - F Hirai
- Department of Gastroenterology and Medicine, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
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7
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Harada D, Takata K, Mori S, Kozuki T, Takechi Y, Moriki S, Asakura Y, Ono T, Nogami N. Retrospective comparative study of the efficacy and safety in docetaxel and ramucirumab combination chemotherapy with or without previous immune checkpoint inhibitor treatment. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Takata K, Andrews J, Thomas G, Butters J, Shishikura D, Di Giovanni G, Nicholls S. Association Of Cholesterol Efflux Capacity With Regression Of Coronary Atherosclerosis. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Shishikura D, Kataoka Y, DiGiovanni G, Janssan A, Takata K, Andrews J, Psaltis P, Wolski K, Nissen S, Nicholls S. The Impact of Plaque Attenuation and Echogenicity on Clinical Outcome: Insight from Intravascular Ultrasound. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Takata K, Shemesh T, Kim S, Duong M, Lyons J, Sidharta S, Brown A, Nicholls S. Associations of Cardiovascular Risk Factors With Cholesterol Efflux Capacity in Indigenous Australians. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Okuno T, Takata K, Yamashita K, Nakatsuji Y, Mochizuki H. Oral succinate contained as a food additive exacerbates experimental autoimmune encephalomyelitis via increased IL-1β production. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Okada R, Inui T, Iguchi Y, Kitagawa T, Takata K, Kitagawa T. Molecular and morphological analyses revealed a cryptic species of dojo loach Misgurnus anguillicaudatus (Cypriniformes: Cobitidae) in Japan. J Fish Biol 2017; 91:989-996. [PMID: 28868749 DOI: 10.1111/jfb.13393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Accepted: 06/29/2017] [Indexed: 06/07/2023]
Abstract
Although it has been reported that populations of the Japanese dojo loach Misgurnus anguillicaudatus (Cypriniformes: Cobitidae) belong to two distinct mitochondrial (mt)DNA (Type I and Type II), the taxonomic status of the species remains unresolved. To address this question, nuclear DNA and morphological analyses were performed on M. anguillicaudatus population in the Nakaikemi Wetland, where Type I and Type II lineages are sympatric. Results suggest the existence of a cryptic species (Type I) within the Japanese dojo loach.
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Affiliation(s)
- R Okada
- Program in Environmental Management, Graduate School of Agriculture, Kindai University, Nara 3327-204, Japan
| | - T Inui
- Program in Environmental Management, Graduate School of Agriculture, Kindai University, Nara 3327-204, Japan
| | - Y Iguchi
- Program in Environmental Management, Graduate School of Agriculture, Kindai University, Nara 3327-204, Japan
| | - T Kitagawa
- Program in Environmental Management, Graduate School of Agriculture, Kindai University, Nara 3327-204, Japan
| | - K Takata
- Department of Biology, Faculty of Science, Shinshu University, Matsumoto 3-1-1, Japan
| | - T Kitagawa
- Program in Environmental Management, Graduate School of Agriculture, Kindai University, Nara 3327-204, Japan
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Takata K, Honda S, Sidharta S, Duong M, Shishikura D, Kim S, Andrews J, Di Bartolo B, Butters J, Psaltis P, Worthley M, Nicholls S. P2334Association between cholesterol efflux capacity and coronary plaque lipid composition on near infrared spectroscopy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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14
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Takata K, Honda S, Sidharta S, Duong M, Shishikura D, Kim S, Andrews J, Bartolo B, Nguyen T, Butters J, Psaltis P, Worthley M, Nicholls S. Relationship of Cholesterol Efflux Capacity with Coronary Plaque Lipid Composition on Near Infrared Spectroscopy. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Honda S, Sidharta S, Shishikura D, Takata K, DiGiovanni G, Potgieter C, Nguyen T, Jassan A, Kim S, Psaltis P, Andrews J, Worthley M, Nicholls S. Change in High-Density Lipoprotein Cholesterol in Relation to Serial Change in Coronary Plaque Lipid Burden Assessed by Near-Infrared Spectroscopy. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Shishikura D, Honda S, Takata K, Andrews J, Psaltis P, Kataoka Y, Nicholls S. Effect of High Intensity Statin Therapy on Intravascular Ultrasound Features of Coronary Plaque Instability. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Takata K, Kataoka Y, Honda S, Shishikura D, Andrews J, Psaltis P, Nicholls S. The Association of Triglyceride/High-Density Lipoprotein Cholesterol Ratio with Lipidic Plaque Features in Diabetic Patients Receiving a Statin: Frequency Domain Optical Coherence Tomography Analysis. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Sittiya J, Yamauchi K, Takata K. Effect of replacing corn with whole-grain paddy rice and brown rice in broiler diets on growth performance and intestinal morphology. J Anim Physiol Anim Nutr (Berl) 2015; 100:381-90. [DOI: 10.1111/jpn.12357] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 05/07/2015] [Indexed: 11/27/2022]
Affiliation(s)
- J. Sittiya
- Laboratory of Animal Science; Faculty of Agriculture; Kagawa University; Miki-cho Kagawa-ken Japan
| | - K. Yamauchi
- Laboratory of Animal Science; Faculty of Agriculture; Kagawa University; Miki-cho Kagawa-ken Japan
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Hsu TH, Takata K, Onozato H, Gwo JC. Causes of the drastic loss of genetic variation in the Critically Endangered Formosa landlocked salmon of Taiwan. ENDANGER SPECIES RES 2015. [DOI: 10.3354/esr00675] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Sittiya J, Yamauchi K, Takata K. Effects of whole-grain paddy rice replacement with or without enzyme addition on broiler performance and intestinal morphology. Br Poult Sci 2014; 55:619-27. [DOI: 10.1080/00071668.2014.950555] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Rauert C, Harrad S, Suzuki G, Takigami H, Uchida N, Takata K. Test chamber and forensic microscopy investigation of the transfer of brominated flame retardants into indoor dust via abrasion of source materials. Sci Total Environ 2014; 493:639-48. [PMID: 24984234 DOI: 10.1016/j.scitotenv.2014.06.029] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/06/2014] [Accepted: 06/10/2014] [Indexed: 05/27/2023]
Abstract
Brominated flame retardants (BFRs) have been detected in indoor dust in many studies, at concentrations spanning several orders of magnitude. Limited information is available on the pathways via which BFRs migrate from treated products into dust, yet the different mechanisms hypothesized to date may provide an explanation for the range of reported concentrations. In particular, transfer of BFRs to dust via abrasion of particles or fibers from treated products may explain elevated concentrations (up to 210 mg g(-1)) of low volatility BFRs like decabromodiphenyl ether (BDE-209). In this study, an indoor dust sample containing a low concentration of hexabromocyclododecane, or HBCD, (110 ng g(-1) ΣHBCDs) was placed on the floor of an in-house test chamber. A fabric curtain treated with HBCDs was placed on a mesh shelf 3 cm above the chamber floor and abrasion induced using a stirrer bar. This induced abrasion generated fibers of the curtain, which contaminated the dust, and ΣHBCD concentrations in the dust increased to between 4020 and 52 500 ng g(-1) for four different abrasion experiment times. The highly contaminated dust (ΣHBCD at 52 500 ng g(-1)) together with three archived dust samples from various UK microenvironments, were investigated with forensic microscopy techniques. These techniques included Micro X-ray fluorescent spectroscopy, scanning emission microscopy coupled with an energy dispersive X-ray spectrometer, Fourier transform infrared spectroscopy with further BFR analysis on LC-MS/MS. Using these techniques, fibers or particles abraded from a product treated with BFRs were identified in all dust samples, thereby accounting for the elevated concentrations detected in the original dust (3500 to 88 800 ng g(-1) ΣHBCD and 24 000 to 1,438 000 ng g(-1) for BDE-209). This study shows how test chamber experiments alongside forensic microscopy techniques, can provide valuable insights into the pathways via which BFRs contaminate indoor dust.
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Affiliation(s)
- C Rauert
- School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK.
| | - S Harrad
- School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - G Suzuki
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - H Takigami
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - N Uchida
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - K Takata
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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22
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Nomura Y, Kaneko M, Saito R, Okuma Y, Kitamura Y, Takata K, Nishi A. A Novel Therapeutic Target Against Alzeimer's Disease: HRD1 as Endoplasmic Reticulum Stress-Related Ubiquitin Ligase. Neurobiol Aging 2014. [DOI: 10.1016/j.neurobiolaging.2014.01.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
OBJECTIVE To clarify the effects of ovariectomy on lipid and bone metabolism. METHODS This study was a prospective study with a longitudinal design within 1 year after surgery. Sixty-two premenopausal women were recruited and divided into two groups: group M (preservation of ovary, n=27) and group BSO (bilateral ovariectomy, n=35). Serum lipid levels, urinary N-telopeptide of type I collagen (NTx) and bone mineral density (BMD) were measured. We also examined the number of postoperative episodes requiring pharmacological intervention. RESULTS There was a significant elevation in the level of low density lipoprotein cholesterol in group BSO from 6 to 12 months compared with the baseline level; the level did not change in group M. The NTx level significantly increased from 6 to 12 months, and the BMD was significantly decreased by as much as 6.7% at 12 months in group BSO; these variables did not change in group M. The effect of lipid and bone metabolism in group BSO was observed when the ages of the two groups were matched. Carbohydrate metabolism and arterial stiffness, measured by pulse wave velocity, did not change throughout the study period in either group. No subjects in group M required medication expect for two patients whose ovarian function was diminished by postoperative radiation and by natural menopause. Eleven women received medication in group BSO: nine for climacteric disorders using hormone therapy (25.7%), and two for dyslipidemia using statins (5.7%). CONCLUSIONS Bilateral ovariectomy seems to cause dyslipidemia and serious loss of bone mineral density within only 1 year, and patients who lose ovarian function may require careful medical care.
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Affiliation(s)
- T Yoshida
- Department of Obstetrics and Gynecology, Yamagata University School of Medicine, Yamagata, Japan
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Takata K, Tada N. Abstract: P415 EZETIMIBE ENHANCES THE IMPROVEMENT OF POSTPRANDIAL HYPERLIPOPROTEINEMIA BY FIBRATE IN PATIENTS WITH TYPE V HYPERLIPOPROTEINEMIA. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70710-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yoshida T, Nagasaki H, Asato Y, Takata K, Ohta T. Abstract: P1346 CHANGES OF SERUM LEVELS OF TOTAL AND HIGH MOLECULAR ADIPONECTINS IN PRETERM INFANTS DURING GROWTH AFTER PRETERM BIRTH. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71363-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Yoshii T, Tamai S, Aoyama N, Minamide J, Takagi S, Motohashi O, Nakayama N, Nishimura K, Takata K, Kameda Y. Clinical outcome of endoscopic mucosal resection (EMR) in clinical stage I (cSt I ) esophageal cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15569 Background: When a tumor invades to the muscularis mucosa or submucosal layer (T1a-MM or T1b, in Japan), cSt I esophageal cancer(EC) has 10–50%. risk of lymph node metastasis (LNM). Surgery, though very invasive, is the standard radical therapy for the patients(pts.) with such stage EC. Endoscopic mucosal resection (EMR), which conserves the esophagus, is a minimally invasive and attractive therapeutic modality for such pts. However, the clinical outcomes of EMR for these pts. have been not fully elucidated. Methods: We conducted retrospective analysis of the clinical courses of 44 pts. who underwent EMR for newly diagnosed T1a-MM or T1bcN0M0 EC between 1994 and 2007at our hospital, and who could be followed up for at least 1 year. Statistical analysis was performed by the Kaplan-Meier methods and the Cox proportional hazard model. Results: Patients decided on the following treatments immediately after EMR based on informed consent and their general condition; 2 underwent surgery, one underwent prophylactic chemotherapy(CHT) and 41 selected follow-up without any additional therapy. Of the 41, 20 selected this course by choice, 12 because of severe concurrent disease; 2 because of poor performance status and 7 because of other multiple primary cancers (MPCs). Twelve pts. died; 2 were cause specific; (4.5%), 8 from MPCs and, 2 from unknown causes. Median age was 67 years old (range 53–80), and 5 were female. No critical comlications were noted. Median follow-up time was 1542days (375–3786). 5 developed LNM. One with prophylactic CHT, was followed by surgery, and another was followed by CHT, who showed cause specific deaths later. Other 3 pts. followed by chemoradiotherapy, did not show cause specific death. Overall and cause specific survival rates at 5 years were 67.3% and 91.8%, respectively. Multivariate analysis revealed that either severe concurrent disease or MPCs significanctly influenced survival (p=0.041, HR 5.437(95%CI 1.073–25.542)). 8 and 6 pts. developed metachronous EC and local recurrence, respectively. Apart from one, they could be retreated endoscopicaly. Conclusions: EMR is a very useful therapeutic modality for cSt I EC, not only for local control but also as a clinically sufficient treatment; especially in pts. with severe concurrent disease. No significant financial relationships to disclose.
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Affiliation(s)
- T. Yoshii
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - S. Tamai
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - N. Aoyama
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - J. Minamide
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - S. Takagi
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - O. Motohashi
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - N. Nakayama
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - K. Nishimura
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - K. Takata
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
| | - Y. Kameda
- Kanagawa Cancer Center, Yokohama, Japan; Prefectural office of Kanagawa District, Yokohama, Japan
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Hirao T, Watanabe A, Miyamoto N, Takata K. Development and characterization of chloroplast microsatellite markers for Cryptomeria japonica D. Don. Mol Ecol Resour 2009; 9:122-4. [PMID: 21564578 DOI: 10.1111/j.1755-0998.2008.02216.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We developed 17 chloroplast microsatellite markers, which consisted of seven mononucleotide microsatellites with a minimum repeat number of 10 and 10 dinucleotide microsatellites with a minimum repeat number of six, from the complete chloroplast genomic sequence of Cryptomeria japonica. A survey of 45 C. japonica individuals showed the number of alleles ranging from two to 11 alleles and a diversity index ranging from 0.085 to 0.895. Consequently, the 45 C. japonica individuals were divided into 39 haplotypes. These markers will be useful genetic markers in the gene flow analysis and population genetics of C. japonica.
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Affiliation(s)
- T Hirao
- Institute of Wood Technology, Akita Prefectural University, 11-1 Kaieisaka, Noshiro, Akita 016-0876, Japan, Forest Tree Breeding Center, 3809-1 Ishi, Juo, Hitachi, Ibaraki 319-1301, Japan
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Takata K, Kurita T, Morishima Y, Morita K, Uraoka M, Sato S. Do the kidneys contribute to propofol elimination? Br J Anaesth 2008; 101:648-52. [DOI: 10.1093/bja/aen249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kurita T, Takata K, Morita K, Sato S. Lipophilic beta-adrenoceptor antagonist propranolol increases the hypnotic and anti-nociceptive effects of isoflurane in a swine model. Br J Anaesth 2008; 100:841-5. [PMID: 18424803 DOI: 10.1093/bja/aen089] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND We have previously reported that landiolol, an ultra-short-acting beta1-adrenoceptor antagonist, does not alter the anaesthetic effects of isoflurane. Here, we investigated the influence of propranolol on the electroencephalographic (EEG) effects and minimum alveolar concentration (MAC) of isoflurane. METHODS Fourteen swine [25.0 (SD 4.0) kg] were anaesthetized by isoflurane inhalation. The inhalation concentration was decreased to 0.5% and maintained for 25 min, before being returned to 2%, and maintained for a further 25 min. End-tidal isoflurane concentrations and spectral edge frequencies were recorded. Pharmacodynamic analysis was performed using a sigmoidal inhibitory maximal effect model for spectral edge frequency vs effect-site concentration. After measurement of the EEG effect, MAC was determined using the dew-claw clamp technique, in which movement in response to clamping is recorded. After completion of control measurements, a propranolol 4 mg bolus followed by an infusion (2 mg h(-1)) was started. After a 30 min stabilization period, the inhalation concentration of isoflurane was varied as in the control period and MAC was re-assessed. RESULTS Propranolol shifted the concentration-effect relationship to the left and decreased the effect-site concentration that produced 50% of the maximal effect from 1.30 (0.18) to 1.13 (0.17)%. Propranolol also decreased isoflurane MAC from 1.91 (0.35) to 1.54 (0.32)%. CONCLUSIONS Propranolol alters both the hypnotic and anti-nociceptive effects of isoflurane. In contrast to landiolol, lipophilic beta-adrenoceptor antagonists may increase the potency of inhalational anaesthetics.
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Affiliation(s)
- T Kurita
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu 431-3192, Japan.
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Sato Y, Ichimura K, Tanaka T, Takata K, Morito T, Sato H, Kondo E, Yanai H, Ohara N, Oka T, Yoshino T. Duodenal follicular lymphomas share common characteristics with mucosa-associated lymphoid tissue lymphomas. J Clin Pathol 2007; 61:377-81. [PMID: 17601964 DOI: 10.1136/jcp.2007.049825] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Follicular lymphomas occasionally arise in the extra-nodal organs and are frequently found in the duodenum. They are often localised tumours with multiple polyps around the ampulla of Vater. AIMS To examine a IgH/bcl-2 hybrid gene and VH gene to investigate the nature of the lymphoma cells and how they differ from nodal follicular lymphomas and MALT lymphomas. METHODS Of 40 patients reported previously, 35 with duodenal follicular lymphoma were studied in detail with respect to clinicopathological characteristics. RESULTS 37/40 patients were in clinical stage I (n = 30) or stage II (n = 7). Clonal immunoglobulin gene rearrangement was detected in 53.3% of examined cases, and rearrangement of IgH/bcl-2 gene at the major break point was detected in 27% of cases. Three of 8 examined cases were VH4 (38%); 2 out of them were VH4-34. As VH4 deviation is one of the common characteristics of MALT lymphomas and 2/3 were identical, duodenal follicular lymphomas have a similar aetiology to MALT lymphomas. Clinical course was also similar to that of MALT lymphomas. CONCLUSIONS Results suggest that duodenal follicular lymphomas have intermediate characteristics of MALT lymphomas and nodal follicular lymphomas.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Blotting, Southern
- Chromosomes, Human, Pair 14
- Chromosomes, Human, Pair 18
- Duodenal Neoplasms/genetics
- Duodenal Neoplasms/pathology
- Female
- Gene Rearrangement
- Genes, Immunoglobulin
- Genes, bcl-2
- Humans
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin Variable Region/genetics
- Immunophenotyping
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/pathology
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/pathology
- Male
- Middle Aged
- Neoplasm Staging
- Sequence Analysis, DNA
- Translocation, Genetic
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Affiliation(s)
- Y Sato
- Department of Pathology, Okayama University Graduate School of Medical, Dentistry and Pharmaceutical Sciencies, Okayama, Japan
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Takata K. Aquaporin-2 (AQP2): its intracellular compartment and trafficking. Cell Mol Biol (Noisy-le-grand) 2006; 52:34-9. [PMID: 17543219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Accepted: 01/17/2006] [Indexed: 05/15/2023]
Abstract
Aquaporins (AQPs) are membrane proteins serving in the transfer of water and small solutes across cellular membranes. At least 7 isoforms, namely AQP1, AQP2, AQP3, AQP4, AQP6, AQP7 and AQP11 are expressed in the kidney. Among them, AQP2 plays a pivotal role in the concentration of urine. AQP2 is expressed in the principal cells of the collecting ducts. It is localized in the intracellular compartment and is translocated to the cell surface upon anti-diuretic hormone stimulation. Analyses in cultured cells expressing AQP2 have provided clues to the trafficking of AQP2. AQP2 resides in the subapical vesicles, some of which are Rab11-positive, suggesting their close relationship with apical recycling endosomes. Upon stimulation with forskolin, AQP2 is translocated to the cell surface. After washout, AQP2 is endocytosed to early endosomes and then transferred to the apical storage compartment. Some of AQP2 is excreted as exosomes. Actin cytoskeleton plays important roles in the trafficking of AQP2. Analyses of molecules found in AQP2-containing vesicles will shed light on the mechanism of AQP2 translocation.
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Affiliation(s)
- K Takata
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan.
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Kurita T, Morita K, Fukuda K, Takata K, Uraoka M, Sanjo Y, Sato S. Landiolol, an ultra-short-acting beta 1-adrenoceptor antagonist, does not alter the electroencephalographic effect of isoflurane in swine model. Br J Anaesth 2006; 96:602-7. [PMID: 16567345 DOI: 10.1093/bja/ael069] [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] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND beta-Adrenergic blocking agents may interact with anaesthetics, and several studies suggest that beta-blockers attenuate electroencephalographic responses during general anaesthesia. We have investigated the influence of landiolol, an ultra-short-acting beta 1-adrenoceptor antagonist, on the electroencephalographic effect of isoflurane in pigs. METHODS Ten swine were anaesthetized through inhalation of 2% isoflurane. The inhalational concentration was then decreased to 0.5% and maintained for 25 min, before being returned to 2% and maintained for a further 25 min (control period). After control measurements, infusion of landiolol (at 0.125 mg kg(-1) min(-1) for 1 min, and then at 0.04 mg kg(-1) min(-1)) was started. After a 20 min stabilization period, the inhalational concentration was varied as in the control period (40 gamma landiolol). Finally, infusion of landiolol was increased from 0.04 to 0.2 mg kg(-1) min(-1), and after a 20 min stabilization period, the inhalational concentration was again varied as in the control period (200 gamma landiolol). End-tidal isoflurane concentrations and spectral edge frequencies were recorded throughout the study. Analysis of the pharmacodynamics was performed using a sigmoidal inhibitory maximal effect model for spectral edge frequency vs effect-site concentration. RESULTS There were no significant differences in the effect of isoflurane among the conditions used. Landiolol did not shift the concentration-effect relationship [the effect-site concentration that produced 50% of the maximal effect was 1.35 (0.17)% under control conditions, 1.30 (0.12)% at 40 gamma landiolol, and 1.38 (0.30)% at 200 gamma landiolol]. CONCLUSION Landiolol does not alter the electroencephalographic effect of isoflurane.
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Affiliation(s)
- T Kurita
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine 1-20-1 Handayama, Hamamatsu 431-3192, Japan.
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Hiromatsu Y, Mukai T, Kaku H, Miyake I, Ichimura M, Fukutani T, Nakayama H, Takata K, Imamura Y, Shoji S, Yamada K, Koda Y, Bednarczuk T. IL-18 gene polymorphism confers susceptibility to the development of anti-GAD65 antibody in Graves' disease. Diabet Med 2006; 23:211-5. [PMID: 16433722 DOI: 10.1111/j.1464-5491.2005.01734.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIMS This study aimed to investigate whether interleukin-18 (IL-18) gene polymorphisms are associated with the development of antibody against the 65-kDa isoform of recombinant human glutamic acid decarboxylase (GAD65Ab) in patients with Graves' disease. METHODS A total of 398 unrelated Japanese patients with Graves' disease, with and without GAD65Ab, were recruited. Three single nucleotide polymorphisms in the IL-18 gene were examined and the polymorphic allele and the genotype and haplotype frequencies calculated. RESULTS The frequency of the GG genotype at position -4675 of the IL-18 gene was significantly lower in Graves' disease patients with GAD65Ab than those without (4% vs. 24%, P = 0.0126). The -4675C allele frequency was significantly greater in patients with GAD65Ab than those without (69% vs. 53%, P = 0.0168). The homozygous -4675G/-607A/-137G haplotype was less common in Graves' disease patients with GAD65Ab than those without (4% vs. 23%, P = 0.0144). CONCLUSIONS These findings in a Japanese population indicate that Graves' disease patients carrying the GG genotype at position -4657 of the promoter of the IL-18 gene or a gene in linkage disequilibrium with the -4675G/-607A/-137G haplotype have a low risk for the development of GAD65Ab in Graves' disease.
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Affiliation(s)
- Y Hiromatsu
- Department of Endocrinology and Metabolism, Kurume University School of Medicine, Fukuoka, Japan.
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Takata K, Toyota Y, Hiraoka A, Mitauba N, Takahashi I, Ohta T. We-P11:100 Fatty liver contributes significantly to the progression of coronary artery disease in patients with metabolic syndrome. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81454-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sato T, Tachiwana T, Takata K, Tay TW, Ishii M, Nakamura R, Kimura S, Kanai Y, Kurohmaru M, Hayashi Y. Testicular dynamics in Syrian hamsters exposed to both short photoperiod and low ambient temperature. Anat Histol Embryol 2005; 34:220-4. [PMID: 15996122 DOI: 10.1111/j.1439-0264.2005.00599.x] [Citation(s) in RCA: 14] [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] [Indexed: 11/28/2022]
Abstract
The object of this study was to determine the details of morphological dynamics of spermatogenesis in Syrian hamsters exposed to both short photoperiod and low ambient temperature. Eight-week-old male hamsters, kept in a long photoperiod (14 h L, 10 h D), were transferred to a short photoperiod (6 h L, 18 h D) and kept there for 13 weeks to induce testicular regression. Some hamsters were then transferred from the room at 23 degrees C to that at 5 degrees C (5 degrees C group). Remaining hamsters were continuously kept at 23 degrees C (23 degrees C group). Thereafter, the morphology was examined. As a result, it took only 8 weeks until spermatogenesis recovered in the 23 degrees C group. However, it was not until 20 weeks that spermatogenesis was recognized in the 5 degrees C group. As the regulation of seasonal testicular activity is characterized by coordinated shifts in the relationships among mitosis, meiosis, and apoptosis, the changes in the proliferative and apoptotic activities were examined. Although no significant difference in proliferative activity of spermatogonia between the 5 degrees C and the 23 degrees C groups was confirmed, a notable increase in the rate of apoptosis was observed in the 5 degrees C group. Furthermore, this increase was more salient during the hibernation period. These findings suggest that both cold ambient temperature and hibernation caused the delay of testicular recrudescence and this delay arose from the increase of apoptotic activity but not the change in proliferative activity in spermatogonia in the 5 degrees C group.
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Affiliation(s)
- T Sato
- Department of Veterinary Anatomy, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Yamato O, Matsunaga S, Takata K, Uetsuka K, Satoh H, Shoda T, Baba Y, Yasoshima A, Kato K, Takahashi K, Yamasaki M, Nakayama H, Doi K, Maede Y, Ogawa H. GM2-gangliosidosis variant 0 (Sandhoff-like disease) in a family of Japanese domestic cats. Vet Rec 2004; 155:739-44. [PMID: 15623087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
A five-month-old, female Japanese domestic shorthair cat with proportionate dwarfism developed neurological disorders, including ataxia, decreased postural responses and generalised body and head tremors, at between two and five months of age. Leucocytosis due to lymphocytosis with abnormal cytoplasmic vacuolations was observed. The concentration of G(M2)-ganglioside in its cerebrospinal fluid was markedly higher than in normal cats, and the activities of beta-hexosaminidases A and B in its leucocytes were markedly reduced. On the basis of these biochemical data, the cat was diagnosed antemortem with G(M2)-gangliosidosis variant 0 (Sandhoff-like disease). The neurological signs became more severe and the cat died at 10 months of age. Histopathologically, neurons throughout the central nervous system were distended, and an ultrastructural study revealed membranous cytoplasmic bodies in these distended neurons. The compound which accumulated in the brain was identified as G(M2)-ganglioside, confirming G(M2)-gangliosidosis. A family study revealed that there were probable heterozygous carriers in which the activities of leucocyte beta-hexosaminidases A and B were less than half the normal value. The Sandhoff-like disease observed in this family of Japanese domestic cats is the first occurrence reported in Japan.
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Affiliation(s)
- O Yamato
- Laboratory of Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
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Takata K. [Education and research in anatomy in Japan--present and future]. Kaibogaku Zasshi 2003; 78:127-30. [PMID: 14689862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
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Takata K, Mishima Y, Shirahama H, Umemoto S, Toyota Y, Hiraoka A. 4P-1034 A novel nonsense mutation of cholesterol ester transfer protein gene and the clinical characterization of Japanese primary hyperalphalipoproteinemias. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91291-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kakimura J, Kitamura Y, Takata K, Tsuchiya D, Taniguchi T, Gebicke-Haerter PJ, Smith MA, Perry G, Shimohama S. Possible involvement of ER chaperone Grp78 on reduced formation of amyloid-beta deposits. Ann N Y Acad Sci 2002; 977:327-32. [PMID: 12480769 DOI: 10.1111/j.1749-6632.2002.tb04834.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J Kakimura
- Department of Neurobiology, Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
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Takata K, Kitamura Y, Kakimura J, Shibagaki K, Taniguchi T, Gebicke-Haerter PJ, Smith MA, Perry G, Shimohama S. Possible protective mechanisms of heme oxygenase-1 in the brain. Ann N Y Acad Sci 2002; 977:501-6. [PMID: 12480792 DOI: 10.1111/j.1749-6632.2002.tb04857.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K Takata
- Department of Neurobiology, Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
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Hayashi K, Kawai-Hirai R, Ishikawa K, Takata K. Reversal of neuronal polarity characterized by conversion of dendrites into axons in neonatal rat cortical neurons in vitro. Neuroscience 2002; 110:7-17. [PMID: 11882368 DOI: 10.1016/s0306-4522(01)00592-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The mechanisms for the establishment and maintenance of cell polarity in neurons are not well understood. Axon regeneration from dendrites has been reported after axotomy near the cell body in vivo. We report here in vitro a reversal of neuronal polarity characterized by the conversion of dendrites into axons. We isolated neurons from the neonatal rat cerebral cortex. Neurons that exhibited an apical dendrite with a length of >100 microm were monitored for 3 days in culture. In 66% of neurons examined, a new axon, as identified by reactivity with an antibody to dephosphorylated tau or by lack of reactivity with an antibody to the a and b isoforms of microtubule-associated protein 2, appeared to form from the tip of the original dendrite. Further analysis of such neurons revealed that the distal half of the original dendrite became positive for dephosphorylated tau or negative for microtubule-associated protein 2. Time-lapse video microscopy demonstrated the conversion of the original dendrite into an axon without dendritic retraction. Axon regeneration from dendritic tips required a significantly longer time than axon regeneration from minor processes. Our observations thus demonstrate in vitro a time-consuming reversal of neuronal polarity and the conversion of a dendritic cytoskeleton into an axonal one.
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Affiliation(s)
- K Hayashi
- Department of Cell Biology, Institute for Cellular and Moleculasr Regulation, Gunma University, 3-39-15 Showamachi, Maebashi, Gunma 371-8512, Japan.
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Hagiwara H, Ohwada N, Aoki T, Takata K. Ciliogenesis and ciliary abnormalities. Med Electron Microsc 2002; 33:109-14. [PMID: 11810467 DOI: 10.1007/s007950000009] [Citation(s) in RCA: 34] [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: 09/11/2000] [Accepted: 09/19/2000] [Indexed: 10/27/2022]
Abstract
Cilia are motile processes extending from the basal bodies, playing important roles in the mucociliary clearance in the respiratory tract and the transport of the ovum from the ovary to the uterus in mammals. Ciliogenesis is divided into four stages: (1) duplication of centrioles; (2) migration of centrioles to the apical cell surface to become basal bodies; (3) elongation of cilia containing the axoneme; and (4) formation of accessory structures of basal bodies. The orderly course of ciliogenesis appears to be disturbed by various internal and external factors and, as a result, various unusual forms of the ciliary apparatus develop in the cell. Inhibition of basal body migration results in development of intracytoplasmic axonemes, cilia within periciliary sheaths, and intracellular ciliated cysts. Swollen cilia and the bulging type of compound cilia are formed during ciliary budding and elongation. This review also discusses the origin, composition, and function of the centriolar precursor structures.
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Affiliation(s)
- H Hagiwara
- Department of Anatomy and Cell Biology, Gunma University School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan.
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Kanno T, Kubohara Y, Goto F, Takata K, Hayashi K. N-methyl-D-aspartate receptor-dependent and -independent cytotoxic effects of Dictyostelium discoideum differentiation-inducing factor-1 on rat cortical neurons. Dev Growth Differ 2001; 43:709-16. [PMID: 11737151 DOI: 10.1046/j.1440-169x.2001.00607.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Differentiation-inducing factor-1 (DIF-1) is a chlorinated alkylphenone (small lipophilic hormone) that induces stalk cell formation in the cellular slime mold Dictyostelium discoideum. Recent studies have revealed that DIF-1 inhibits growth and induces the differentiation of mammalian tumor cells. The present study examines the effects of DIF-1 on rat cortical neurons in primary culture. We found that DIF-1 induced rapid neuronal cell death. The release of lactate dehydrogenase (LDH), as an indicator of cell death, increased dose-dependently with DIF-1. The release of LDH was inhibited by the N-methyl-D-aspartate (NMDA) receptor antagonists MK801 and AP5, suggesting that the NMDA receptor is involved in the induction of cell death by DIF-1. However, glutamate cytotoxicity could not explain the entire action of DIF-1 on neurons because the estimated concentration of glutamate around DIF-1-treated neurons was below 50 microM and DIF-1 caused more severe cell death than 500 microM glutamate. We discovered that another portion of DIF-1 cytotoxicity is independent of the NMDA receptor; that is, coaddition of DIF-1 and MK801 induced dendritic beading and increased expression of the immediate early genes c-fos and zif/268. These results indicate that DIF-1 induces rapid cell death via both NMDA receptor-dependent and -independent pathways in rat cortical neurons.
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Affiliation(s)
- T Kanno
- Laboratory of Molecular and Cellular Morphology, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15, Showamachi, Maebashi, Gunma 371-8512, Japan
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Suzuki T, Fujikura K, Koyama H, Matsuzaki T, Takahashi Y, Takata K. The apical localization of SGLT1 glucose transporter is determined by the short amino acid sequence in its N-terminal domain. Eur J Cell Biol 2001; 80:765-74. [PMID: 11831390 DOI: 10.1078/0171-9335-00204] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
SGLT1, an isoform of Na+-dependent glucose cotransporters, is localized at the apical plasma membrane in the epithelial cells of the small intestine and the kidney, where it plays a pivotal role in the absorption and reabsorption of sugars, respectively. To search the domain responsible for the apical localization of SGLT1, we constructed an N-terminal deletion clone series of rat SGLT1 and analyzed the localization of the respective products in Madin-Darby canine kidney (MDCK) cells. The products of N-terminal deletion clones up to the 19th amino acid were localized at the apical plasma membrane, whereas the products of N-terminal 20- and 23-amino-acid deletion clones were localized along the entire plasma membrane. Since single-amino-acid mutations of either D28N or D28G in the N-terminal domain give rise to glucose/galactose malabsorption disease, we examined the localization of these mutants. The products of D28N and D28G clones were localized in the cytoplasm, showing that the aspartic acid-28 may be essential for the delivery of SGLT1 to the plasma membrane. These results suggest that a short amino acid sequence of the N-terminal domain of SGLT1 plays important roles in plasma membrane targeting and specific apical localization of the protein.
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Affiliation(s)
- T Suzuki
- Department of Cell Biology, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan.
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Kano A, Hagiwara H, Takata K, Mogi K. Immunolocalization of centriole-associated striated rootlets in human submandibular gland cells with and without solitary cilia. Histochem J 2001; 33:613-20. [PMID: 12197669 DOI: 10.1023/a:1016346116017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Using an antibody specific to striated rootlets, we investigated the immuolocalization of striated rootlets in cells constituting human submandibular glands. Striated rootlets were positively stained in all cell types constituting acini, intercalated ducts, striated ducts, and interlobular ducts, but their shapes were different. The mean lengths of striated rootlets were 1.46 +/- 0.49, 3.15 +/- 1.35 and 3.99 +/- 1.02 microm in acinar secretory cells, myoepithelial cells, and columnar cells of the striated duct, respectively. The rootlets were the longest in columnar cells of the striated duct, in which paired centrioles were located in the apical cytoplasm away from nuclei. These findings suggest that striated rootlets play important roles in the positioning of centrioles in the cell. 2-8% of striated rootlets in myoepithelial cells were associated with solitary cilia, but they were not associated with solitary cilia in acinar cells and columnar cells of the striated duct. These observations suggest that striated rootlets may be associated with centrioles under normal physiological conditions, without formation of solitary cilia.
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Affiliation(s)
- A Kano
- Department of Oral and Maxillofacial Surgery, Gunma University School of Medicine, Maebashi, Japan
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Takata K, Yoshida H, Hirose F, Yamaguchi M, Kai M, Oshige M, Sakimoto I, Koiwai O, Sakaguchi K. Drosophila mitochondrial transcription factor A: characterization of its cDNA and expression pattern during development. Biochem Biophys Res Commun 2001; 287:474-83. [PMID: 11554753 DOI: 10.1006/bbrc.2001.5528] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We cloned a cDNA for Drosophila mitochondrial transcription factor A (D-mtTFA) and characterized the recombinant protein. In Drosophila Kc cells, D-mtTFA was localized in the mitochondria, but not in the nucleus. By repetitive precipitation with His-tag and PCR amplification, the consensus nucleotide sequence for D-mtTFA-binding was determined to be 5'-TTATC/G. The binding sequence was found to be clustered in the A + T region of mitochondrial DNA which is suggested to be a replication origin and promoter region for light strand and heavy strand. We found a DNA replication-related element (DRE)-like sequence located upstream of the transcription initiation site of the D-mtTFA gene and obtained results indicating that DRE-binding factor (DREF) can bind to the DRE-like sequence of the D-mtTFA gene. The data suggest that transcription of the D-mtTFA gene is under control of the DRE/DREF regulatory system. Based on these results, the functions of D-mtTFA were discussed in relation to mitochondrial biogenesis of Drosophila melanogaster.
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Affiliation(s)
- K Takata
- Department of Applied Biological Science, Faculty of Science and Technology, Science University of Tokyo, 2641 Yamazaki, Noda-shi, Chiba-ken 278-8510, Japan
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Kajikawa T, Nozawa T, Owari Y, Fujisawa H, Kaneko T, Noro K, Takata K. [Bowel perforation after extracorporeal shock wave lithotripsy: a case report]. Nihon Hinyokika Gakkai Zasshi 2001; 92:586-8. [PMID: 11517571 DOI: 10.5980/jpnjurol1989.92.586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A case of intestinal perforation caused by ESWL for left ureteral calculus is reported. A 69-year-old male underwent the graft replacement for bilateral iliac aneurysm in March, 1996. In February, 1999, there appeared left flank pain, and a diagnosis of left ureterolithiasis was made by radiological examination. On March 29 he was admitted to our department for ESWL. On March 30, ESWL for calculus in the pelvic region was performed with the patient in the prone position. The patient complained of the left lower abdominal pain immediately after ESWL, but no muscular defense was observed. Since the pain was not relieved, CT was performed on March 31, but no evident abnormal finding was found. Thereafter the pain continued and on April 2 muscular defense was also noted. On CT performed a second time, free air and evidence of ileus were found, so emergency operation was performed. Two perforations about 2 mm in size were found in the jejunum 130 cm from the Treitz' ligament, which led to diagnosis of intestinal perforation due to ESWL. The patient followed a satisfactory postoperative course and was discharged on April 23. There has been only one reported case of intestinal perforation due to ESWL. It is a very rare complication. However, this complication should be taken into consideration where the patient has the history of abdominal surgery and where ESWL was performed with the patient in the prone position.
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Affiliation(s)
- T Kajikawa
- Department of Urology, Iwate Prefectural Central Hospital
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Abstract
Aquaporins (AQPs) are water channel proteins that participate in water transport. In the principal cells of the kidney collecting duct, water reabsorption is mediated by the combined action of AQP2 in the apical membrane and both AQP3 and AQP4 in the basolateral membrane, and the expression of AQP2 and AQP3 is regulated by antidiuretic hormone and water restriction. The effect of hypertonicity on AQP3 expression in Madin-Darby canine kidney (MDCK) epithelial cells was investigated by exposing the cells to hypertonic medium containing raffinose or NaCl. Northern blot and immunoblot analyses revealed that the amounts of AQP3 mRNA and AQP3 protein, respectively, were markedly increased by exposure of cells to hypertonicity. These effects were maximal at 12 and 24 h, respectively. Immunofluorescence and immunoelectron microscopy also demonstrated that the abundance of AQP3 protein was increased in cells incubated in hypertonic medium and that the protein was localized at the basolateral plasma membrane. These results indicate that the expression of AQP3 is upregulated by hypertonicity.
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Affiliation(s)
- T Matsuzaki
- Laboratory of Molecular and Cellular Morphology, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma 371-8512, Japan
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Fukushima Y, Saitoh T, Anai M, Ogihara T, Inukai K, Funaki M, Sakoda H, Onishi Y, Ono H, Fujishiro M, Ishikawa T, Takata K, Nagai R, Omata M, Asano T. Palmitoylation of the canine histamine H2 receptor occurs at Cys(305) and is important for cell surface targeting. Biochim Biophys Acta 2001; 1539:181-91. [PMID: 11420116 DOI: 10.1016/s0167-4889(01)00104-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
To determine the presence and functional role of the histamine H2 receptor (H2R) palmitoylation, a receptor with a Cys(305) to Ala (A(305) receptor) mutation was generated. Wild-type (WT) and A(305) receptors were tagged at their N-termini with a hemagglutinin (HA) epitope. WT, but not A(305), receptors incorporated [3H]palmitate by metabolic labeling, indicating that the H2R is palmitoylated at Cys(305). Immunocytochemistry of WT and A(305) receptors expressed in COS7 cells revealed WT receptors to be distributed at the plasma membrane, while the majority of A(305) receptors were localized intracellularly with only a small portion being at the plasma membrane. However, the affinity of the A(305) receptor for tiotidine was comparable to that of the WT receptor. In addition, when the amounts of cell surface receptors as determined by anti-HA antibody binding were equivalent, A(305) receptors mediated production of more cAMP than WT receptors. Preincubation of COS7 cells expressing each receptor with 10(-5) M histamine for 30 min reduced subsequent cAMP production in response to histamine via the receptors to similar extents, indicating that palmitoylation is not necessary for desensitization. In addition, cell surface A(305) receptors were capable of being internalized from the cell surface at a rate and extent similar to those of WT receptors. Finally, CHO cell lines stably expressing either WT or A(305) receptors were incubated with 10(-5) M histamine for 1, 6, 12 and 24 h. Total amounts of WT and A(305) receptors, as determined by tiotidine binding, were reduced by incubation, indicating downregulation. Downregulation of the A(305) receptor was more extensive than that of the WT receptor. Thus, palmitoylation of the H2R might be important for targeting to the cell surface and stability.
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Affiliation(s)
- Y Fukushima
- Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Japan.
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Abstract
We did a 5-year follow-up study on sleep apnea syndrome (SAS)-related symptoms and respiratory disorder variables on 109 patients. At follow up, SAS-related symptoms were improved in a significantly higher percentage of the treatment success group than the treatment failure group. A significant deterioration of the respiratory disorder variables was recognized only in the patients 40-60 years of age. These results indicate that treatment effect for SAS might be maintained in the long term and that the natural evolution of the disorder might be prominent in middle-aged patients.
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Affiliation(s)
- Y Inoue
- Department of Psychiatry, Juntendo University School of Medicine, Tokyo, Japan.
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