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Mitsuhashi R, Song BS, Inoue K, Asano T, Noda S. Design and fabrication of a coupled high-Q photonic nanocavity system with large coupling coefficients. Opt Express 2024; 32:10630-10647. [PMID: 38571269 DOI: 10.1364/oe.513508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/27/2024] [Indexed: 04/05/2024]
Abstract
In a previous work, we demonstrated a coupled cavity system where photons in one storage cavity can be transferred to another storage cavity at an arbitrary time by applying a voltage pulse to a third cavity placed in a p-i-n junction. In this work, we demonstrate methods to improve the transfer efficiency and photon lifetimes of such a coupled system. Firstly, we designed a photonic-crystal structure that achieves a large coupling coefficient without reducing the radiation quality factor compared to the previously proposed structure: The photonic-crystal design was changed to a more symmetric configuration to suppress radiation losses and then optimized using an automatic structure tuning method based on the Covariance Matrix Adaptive Evolutional Strategy (CMAES). Here we added two improvements to achieve an evolution toward the desired direction in the two-dimensional target parameter space (spanned by the coupling coefficient and the inverse radiation loss). Secondly, to improve the experimental cavity quality factors, we developed a fabrication process that reduces the surface contamination associated with the fabrication of the p-i-n junction: We covered the photonic structure with a SiO2 mask to avoid the contamination and the electrode material was changed from Al to Au/Cr to enable cleaning by a weak acid. Owing to these improvements of the cavity design and the fabrication process, the obtained system provides coupling strengths that are about three times stronger and photon lifetimes that are about two times longer, compared to the previously reported system.
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Ishizu H, Shimizu T, Arita K, Sato K, Takahashi R, Kusunoki K, Shimodan S, Asano T, Iwasaki N. Secondary fracture and mortality risk with very high fracture risk osteoporosis and proximal femoral fracture. J Bone Miner Metab 2024; 42:196-206. [PMID: 38308695 DOI: 10.1007/s00774-023-01492-1] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 12/06/2023] [Indexed: 02/05/2024]
Abstract
INTRODUCTION We aimed to investigate secondary fracture and mortality rates, and risk factors in patients with proximal femoral fractures. MATERIALS AND METHODS We conducted a multicenter prospective cohort study on female patients with proximal femoral fractures who underwent surgical treatment between April 2020 and March 2021. Postoperative follow-ups were performed at 6-, 12-, 18-, and 24-month intervals to determine the secondary fracture and mortality rates, and the risk factors and its influence were examined. RESULTS Of the 279 registered patients, 144 patients (51.6%) were diagnosed with very high fracture risk osteoporosis. The postoperative osteoporosis rate exceeded 96%; however, osteoanabolic agents were used sparingly. The risk factor of both secondary fracture and mortality was very high fracture risk osteoporosis, and secondary fractures within 12 months were markedly occurred. Secondary fracture rates increased as the number of matched very high fracture risk osteoporosis criteria increased. Notably, secondary fractures and mortality were recorded in 21.4% and 23.5% of the patients who met all criteria, respectively. CONCLUSION Over half of the female patients with proximal femoral fractures had very high fracture risk osteoporosis. Although, very high fracture risk osteoporosis demonstrated a notably increased risk of secondary fractures, particularly at 12 months post-surgery, the use of osteoanabolic agents was substantially low. Collectively, our findings highlight the need to consider the risk of very high fracture risk osteoporosis, expand the use of medications to include osteoanabolic agents, and reconsider the current healthcare approach for proximal femoral fractures.
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Affiliation(s)
- Hotaka Ishizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.
| | - Kosuke Arita
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, KKR Sapporo Medical Center, Sapporo, Japan
| | - Komei Sato
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Iwamizawa City Hospital, Iwamizawa, Hokkaido, Japan
| | - Renya Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Kushiro City General Hospital, Kushiro, Hokkaido, Japan
| | - Kenichi Kusunoki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Central Hospital, Hakodate, Hokkaido, Japan
| | - Shun Shimodan
- Department of Orthopaedic Surgery, Kushiro City General Hospital, Kushiro, Hokkaido, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, KKR Sapporo Medical Center, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
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Shibayama H, Yamaga S, Sugawara Y, Asano T, Iwasaki N. The Novel Ulnar Nerve Coverage Method Which Has the Potential to Prevent the Postoperative Ulnar Neuropathy after Plate Fixation of Distal Humerus Fractures: Three Case Reports. Case Rep Orthop 2023; 2023:5008141. [PMID: 38053758 PMCID: PMC10695686 DOI: 10.1155/2023/5008141] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/21/2023] [Accepted: 10/28/2023] [Indexed: 12/07/2023] Open
Abstract
Introduction Postoperative ulnar neuropathy is still an unresolved complication in patients undergoing plate fixation of distal humerus fractures. We hypothesized that decreased blood flow to the ulnar nerve due to intraoperative procedures is an important factor in the development of postoperative ulnar neuropathy. We herein report three cases of distal humerus fractures in which the soft tissues surrounding the ulnar nerve were preserved as much as possible and finally not transferred anteriorly. Case Presentation. A 76-year-old woman, 82-year-old woman, and 34-year-old woman underwent plate fixation for distal humerus fractures. None of the patients developed postoperative ulnar neuropathy, and there were no complaints of numbness after postoperative day 1. Nerve conduction studies were performed after 3 months postoperatively and revealed that the motor nerve conduction velocities and compound motor nerve action potentials of the ulnar nerve in two of the three patients were higher than those of the noninjured side. In one of the three patients, these values were slightly lower than those of the noninjured side. All three patients achieved bony union after several months postoperatively. Conclusions We obtained good outcomes with the ulnar nerve coverage method for preventing postoperative ulnar neuropathy in patients with distal humerus fractures. Preservation of blood flow to the ulnar nerve was considered important, and anatomical repositioning of the ulnar nerve after plate fixation has the potential to prevent adhesion between the ulnar nerve and the plate.
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Affiliation(s)
- Hiroki Shibayama
- Department of Orthopaedic Surgery, KKR Sapporo Medical Center, 6-3-40, Hiragishi 1-jo, Toyohira-ku, Sapporo, Hokkaido 062-0931, Japan
| | - Shintaro Yamaga
- Department of Orthopaedic Surgery, KKR Sapporo Medical Center, 6-3-40, Hiragishi 1-jo, Toyohira-ku, Sapporo, Hokkaido 062-0931, Japan
| | - Yutaro Sugawara
- Department of Orthopaedic Surgery, KKR Sapporo Medical Center, 6-3-40, Hiragishi 1-jo, Toyohira-ku, Sapporo, Hokkaido 062-0931, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, KKR Sapporo Medical Center, 6-3-40, Hiragishi 1-jo, Toyohira-ku, Sapporo, Hokkaido 062-0931, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Nishi 7, Kita 15, Kita-ku, Sapporo, Hokkaido 060-8638, Japan
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Oue T, Shimizu T, Asano T, Shimodan S, Ishizu H, Arita K, Iwasaki N. Comparison of the Efficacy of Zoledronate Acid or Denosumab After Switching from Romosozumab in Japanese Postmenopausal Patients. Calcif Tissue Int 2023; 112:683-690. [PMID: 37037949 DOI: 10.1007/s00223-023-01079-y] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/28/2023] [Indexed: 04/12/2023]
Abstract
We aimed to compare the efficacy of switching from romosozumab (RMAb) to denosumab (DMAb) or zoledronic acid (Zol) with respect to changes in bone mineral density (BMD) and bone metabolism. We also aimed to determine predictors of changes in BMD among patients who received sequential therapy from RMAb. One hundred patients who received RMAb therapy were recruited for this study. A total 49 patients received bisphosphonate (BP) pre-treatment and 51 received active vitamin D3 analog pre-treatment or no treatment. Forty-two patients were switched to Zol (BP-RMAb-Zol; 20 and RMAb-Zol; 22), and 58 patients were switched to DMAb (BP-RMAb-DMAb; 29 and RMAb-DMAb; 29). Longitudinal changes in bone metabolic markers (P1NP and TRACP-5b) and BMD were also evaluated. In the BP-RMAb-Zol group, TRACP-5b increased after administration of Zol, and the mean BMD of the lumbar spine (LS) was significantly lower than those in the BP-RMAb-DMAb, RMAb-Zol and RMAb-DMAb groups at 24 months. The % changes in BMD of the LS after 24 months were associated with TRACP-5b values at baseline and at 12 months in patients who received Zol therapy, and with TRACP-5b value at baseline in patients who received DMAb therapy. The DMAb follow-on regimen could be considered more effective than Zol as a sequential agent for the enhancement of BMD after RMAb in patients with BP pretreatment. TRACP-5b, especially the baseline value, may predict the efficacy of sequential therapy from RMAb, as well as previous treatments.
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Affiliation(s)
- Tetsuro Oue
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Tsuyoshi Asano
- Department of Orthopedic Surgery, KKR Sapporo Medical Center, Sapporo, Japan
| | - Shun Shimodan
- Department of Orthopedic Surgery, Kushiro City General Hospital, Kushiro, Japan
| | - Hotaka Ishizu
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Kosuke Arita
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
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Asano T, Udagawa T, Komura N, Imamura A, Ishida H, Ando H, Tanaka HN. Unprecedented neighboring group participation of C2 N-imidoxy functionalities for 1,2-trans-selective glycosylation. Carbohydr Res 2023; 527:108808. [PMID: 37068315 DOI: 10.1016/j.carres.2023.108808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/28/2023] [Accepted: 04/05/2023] [Indexed: 04/08/2023]
Abstract
Stereoselective glycosylation reactions are important in carbohydrate chemistry. The most used method for 1,2-trans(β)-selective glycosylation involves the neighboring group participation (NGP) of the 2-O-acyl protecting group; nevertheless, an alternative stereoselective method independent of classical NGP would contribute to carbohydrate chemistry, despite being challenging to achieve. Herein, a β-selective glycosylation reaction employing unprecedented NGP of the C2 N-succinimidoxy and phthalimidoxy functionalities is reported. The C2 functionalities provided the glycosylated products in high yields with β-selectivity. The participation of the functionalities from the α face of the glycosyl oxocarbenium ions gives stable six-membered intermediates and is supported by density functional theory calculations. The applicability of the phthalimidoxy functionality for hydroxyl protection is also demonstrated. This work expands the scope of functionalities tolerated in carbohydrate chemistry to include O-N moieties.
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Suzuki Y, Nakagawa S, Endo T, Sotome A, Yuan R, Asano T, Otsuguro S, Maenaka K, Iwasaki N, Kadoya K. High-Throughput Screening Assay Identifies Berberine and Mubritinib as Neuroprotection Drugs for Spinal Cord Injury via Blood-Spinal Cord Barrier Protection. Neurotherapeutics 2022; 19:1976-1991. [PMID: 36178590 PMCID: PMC9723073 DOI: 10.1007/s13311-022-01310-y] [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] [Accepted: 09/19/2022] [Indexed: 12/13/2022] Open
Abstract
Because the breakdown of the blood-brain spinal cord barrier (BBSCB) worsens many central nervous system (CNS) diseases, prevention of BBSCB breakdown has been a major therapeutic target, especially for spinal cord injury (SCI). However, effective drugs that protect BBSCB function have yet to be developed. The purpose of the current study was 1) to develop a high-throughput screening assay (HTSA) to identify candidate drugs to protect BBSCB function, 2) to identify candidate drugs from existing drugs with newly developed HTSA, and 3) to examine the therapeutic effects of candidate drugs on SCI. Our HTSA included a culture of immortalized human brain endothelial cells primed with candidate drugs, stress with H2O2, and evaluation of their viability. A combination of the resazurin-based assay with 0.45 mM H2O2 qualified as a reliable HTSA. Screening of 1,570 existing drugs identified 90 drugs as hit drugs. Through a combination of reproducibility tests, exclusion of drugs inappropriate for clinical translation, and dose dependency tests, berberine, mubritinib, and pioglitazone were identified as a candidate. An in vitro BBSCB functional test revealed that berberine and mubritinib, but not pioglitazone, protected BBSCB from oxygen-glucose deprivation and reoxygenation stress. Additionally, these two drugs minimized BBSCB breakdown 1 day after cervical SCI in mice. Furthermore, berberine and mubritinib reduced neuronal loss and improved gait performance 8 weeks after SCI. Collectively, the current study established a useful HTSA to identify potential neuroprotective drugs by maintaining BBSCB function and demonstrated the neuroprotective effect of berberine and mubritinib after SCI.
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Affiliation(s)
- Yuki Suzuki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Shinsuke Nakagawa
- Department of Pharmaceutical Care and Health Sciences, Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Takeshi Endo
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Akihito Sotome
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Rufei Yuan
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Satoko Otsuguro
- Center for Research and Education On Drug Discovery, Department of Medical Pharmacology, Hokkaido University, Kita 12 jo, Nishi 6 chome, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
| | - Katsumi Maenaka
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12 jo, Nishi 6 chome, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Ken Kadoya
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15 jo, Nishi 7 chome, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.
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Fujita R, Endo T, Takahata M, Haraya K, Suzuki H, Oda I, Kanayama M, Asano T, Shigenobu K, Iwata A, Yamada K, Takeuchi H, Ohura H, Yoneoka D, Iwasaki N. Real-world persistence of twice-weekly teriparatide and factors associated with the discontinuation in patients with osteoporosis. J Bone Miner Metab 2022; 40:782-789. [PMID: 35759143 PMCID: PMC9244578 DOI: 10.1007/s00774-022-01347-1] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/15/2022] [Indexed: 11/28/2022]
Abstract
INTRODUCTION A 28.2 μg twice-weekly formulation of teriparatide (2/W-TPD) was developed to provide comparably high efficacy for osteoporosis to a 56.5 μg once-weekly formulation while improving the safety and persistence rate. In the current study, we aimed to elucidate the real-world persistence of 2/W-TPD and to identify the factors associated with the discontinuation of 2/W-TPD in patients with severe osteoporosis. MATERIALS AND METHODS This retrospective study included 90 patients who were treated with 2/W-TPD at three hospitals in Japan. Patient information was collected, including age, sex, distance to the hospital, family structure, comorbidities, previous treatment for osteoporosis, timing of the injection, side effects and duration of 2/W-TPD treatment, barthel index (BI), and bone mineral density (BMD) of the lumbar spine and femoral neck. We examined the factors influencing 2/W-TPD discontinuation using the Cox proportional hazards model. RESULTS The 12 month completion rate of 2/W-TPD therapy was 47.5%. The Cox hazard analysis identified side effects [Hazard Ratio (HR) = 14.59, P < 0.001], low BMD of the femoral neck (HR = 0.04, P = 0.002), and morning injection (HR = 3.29, P = 0.006) as risk factors influencing the discontinuation of 2/W-TPD. Other variables, including age, did not contribute to the continuation of 2/W-TPD. CONCLUSION One year continuation rate of 2/W-TPD was higher than the previously reported value of the once-weekly formulation in real-world setting, probably due to the lower incidence of side effects. Introducing injection of 2/W-TPD may further improve the persistence of TPD therapy for osteoporosis.
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Affiliation(s)
- Ryo Fujita
- Hokkaido Orthopedic Memorial Hospital, Sapporo, Hokkaido, Japan
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, Japan
| | - Tsutomu Endo
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, Japan.
| | - Masahiko Takahata
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, Japan
| | | | - Hisataka Suzuki
- Hakodate Central General Hospital, Hakodate, Hokkaido, Japan
| | - Itaru Oda
- Hokkaido Orthopedic Memorial Hospital, Sapporo, Hokkaido, Japan
| | | | | | | | - Akira Iwata
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, Japan
| | - Katsuhisa Yamada
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, Japan
| | | | - Hisanori Ohura
- Hokkaido Orthopedic Memorial Hospital, Sapporo, Hokkaido, Japan
| | - Daisuke Yoneoka
- Division of Biostatistics and Bioinformatics, Graduate School of Public Health, St. Luke's International University, 3-6-2 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Norimasa Iwasaki
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, Japan
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Ogawa T, Shimizu T, Asano T, Iwasaki N, Takahashi D. Radiological predictors associated with success of treatment for developmental dysplasia of hip using the Pavlik harness: A retrospective study. J Orthop Sci 2022; 27:1067-1072. [PMID: 34364753 DOI: 10.1016/j.jos.2021.06.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND While various predictors of treatment outcome of Pavlik harness have been reported, appropriate indications for treatment and relationships between patient characteristics and outcome are unclear. The present study aimed to identify radiological predictors for successful Pavlik harness treatment of DDH at the initiation of treatment and investigate the progression of radiological characteristics after successful treatment. METHODS One-hundred-forty-two of 527 infants who visited our hospital for secondary screening of DDH were treated with the Pavlik harness. One-hundred-eight hips of 108 infants experienced successful treatment and could be followed up until 3 years of age (group S); treatment was unsuccessful within the first 2 weeks for 22 hips of 21 infants (group F). We investigated the Graf classification and radiological parameters. RESULTS We observed the ipsilateral-side measurements of distance A and B as defined by Yamamuro and Chene's method to be significantly smaller and greater, respectively, in group F compared with those of group S. Group F tended to exhibit the smaller distance A and larger distance B compared to the group S among the same Graf type. The cut-off values for successful treatment at were >7.4 mm at initiation of treatment for distance A and <11.2 mm for distance B. The acetabular index (AI) of the ipsilateral side at the initiation of treatment was significantly correlated with that at 1 and 3 years of age. Patients with an AI of >32° at the initiation of harness treatment were more likely to exhibit hip dysplasia at 3 years of age. CONCLUSIONS Radiographic parameters prior to the Pavlik harness could be predictors of treatment failure and DDH in the future. This study showed that AI at the initiation of treatment is associated with residual acetabular dysplasia, suggesting that radiographic assessment may be useful even considering the risks associated with radiation exposure.
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Affiliation(s)
- Takuya Ogawa
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
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Bartoli-Leonard F, Rogers M, Zheng K, Small A, Asano T, Kuraoka S, Blaser M, Natarajan P, Yeang C, Tsimikas S, O'donnell C, Aikawa M, Singh S, Stroes E, Aikawa E. Inhibition of novel lipoprotein(a) receptor major facilitator superfamily domain containing 5 (MFSD5) reduces development of aortic valve calcification. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.139] [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: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Other. Main funding source(s): Private grant from Kowa Pharmaceuticals to Brigham and Woman's Hospital
Calcific aortic valve stenosis (CAVS) is the most prevent valvular heart disease in the western world increasing exponentially with age, with an 112% increase in CAVS deaths in the last three decades; however no therapeutic treatment is currently available. Recently, lipoprotein(a) [Lp(a)] has been demonstrated to be an independent and causal risk factor for CAVS, yet the understanding of its cellular uptake and catabolism is limited thus underscoring the need for further investigation.
This study aimed to determine a target receptor, unique for Lp(a) on the surface of valvular interstitial cells (VICs) and ascertain the role of the receptor on the development of VIC calcification.
Unbiased ligand-receptor capture mass spectrometry (TriCEPS) was used to identify target receptor, with western blotting, ELISA, qPCR, alizarin red calcium staining and immunofluorescence used to validate the targets in vitro via siRNA inhibition and overexpression. Transmission electron microscopy (TEM) was used to determine uptake of Lp(a) within excised human valves. Identification of small molecule inhibitors was assessed computationally via the L1000 dataset, with the top hit candidate validated in vitro. Genotype-phenotype studies were examined using the United Kingdom Biobank (UKBB) and the Millions Veterans Program. Linear regression was used to evaluate association between aortic stenosis and plasma Lp(a) levels, and a phenotype-wide association analysis was then performed against this generated ‘genotype’.
Ligand-receptor capture mass spectrometry was used to detect novel membrane proteins with specific binding to Lp(a); MFSD5, MRC2, LDLR were identified as possible candidates. MFSD5 RNAscope demonstrated its presence in human aortic valves. Lp(a) uptake in VICs was confirmed via western blot and TEM. MFSD5 siRNA significantly reduced dil-labelled Lp(a) uptake in human VICs (p=0.003) and HEPG2 cells (p=0.0003), conversely MFSD5 overexpression increased uptake (p=0.0345, p=0.0318), whilst specificity of MFSD5 to Lp(a) alone was shown via no change in LDL uptake following MFSD5 inhibition (p=0.616, p=0.991). MFSD5 inhibition reduced RUNX2 (p=0.0124) and Osteocalcin (p<0.001) RNA expression and reduced alizarin red staining following culture in Lp(a) osteogenic media for 21 days (p<0.0033). Druggability of MFSD5 was confirmed by the L1000 database, which identified aminopurvalanol as a binding partner for MFSD5 and significantly reduced Lp(a) uptake within VICs (p=0.0091). MFSD5-loss of function within the UKBB showed no significant cardiovascular association, however 50kb +/- of the MFSD5 gene showed nominal association with hyperlipidaemia and atrial fibrillation.
The current study demonstrates the novel Lp(a) receptor MFSD5 may be responsible for uptake of Lp(a) within VICs, resulting in the development of aortic valve calcification, highlighting the need for further exploration into the role of MFSD5 in aortic valve disease.
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Affiliation(s)
- F Bartoli-Leonard
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - M Rogers
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - K Zheng
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - A Small
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - T Asano
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - S Kuraoka
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - M Blaser
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - P Natarajan
- Boston VA Healthcare System , Boston , United States of America
| | - C Yeang
- University of California, San Diego , San Diego , United States of America
| | - S Tsimikas
- University of California, San Diego , San Diego , United States of America
| | - C O'donnell
- Boston VA Healthcare System , Boston , United States of America
| | - M Aikawa
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - S Singh
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - E Stroes
- Amsterdam UMC - Location Academic Medical Center , Amsterdam , Netherlands (The)
| | - E Aikawa
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
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Ishizu H, Shimizu T, Kaibara T, Asano T, Terkawi MA, Takahashi D, Iwasaki N. Bilateral subchondral insufficiency fractures of the femoral head in a normally active adolescent patient: A case report. J Orthop Sci 2022; 27:492-494. [PMID: 31176516 DOI: 10.1016/j.jos.2019.05.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 12/17/2018] [Revised: 04/21/2019] [Accepted: 05/14/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Hotaka Ishizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan.
| | - Takuma Kaibara
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Mohamad Alaa Terkawi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
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Nakamura Y, Shimizu T, Asano T, Shimodan S, Ishizu H, Takahashi D, Takahata M, Iwasaki N. Short-term efficacy and safety of zoledronate acid or denosumab in Japanese patients with postmenopausal osteoporosis. J Bone Miner Metab 2021; 39:824-832. [PMID: 33821302 PMCID: PMC8021003 DOI: 10.1007/s00774-021-01221-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/04/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION We aimed to compare the efficacy after switching from either bisphosphonates (BPs) or non-BPs (NBPs) to combination therapies of denosumab (DMAb) or zoledronic acid (Zol) with eldecalcitol (ELD) in bone mineral density (BMD) and bone metabolism and investigate the prognostic and risk factors of side effects of this therapy. MATERIALS AND METHODS One-hundred forty-eight patients with postmenopausal osteoporosis were recruited; their therapy was switched from BPs or NBPs to Zol or DMAb plus ELD (BP-Zol: 43, NBP-Zol: 32, BP-DMAb: 35, and NBP-DMAb: 38). Longitudinal changes in bone metabolic markers (P1NP and TRACP-5b) and BMD were evaluated. RESULTS In the BP-Zol group, P1NP did not change after 6 months and increased by 38.9% after 12 months. TRACP-5b decreased 15.8% after 6 months, but came back to baseline values 12 months after administration. In the rest of the groups, the bone metabolic markers remained suppressed after 6 and 12 months. Compared with baseline, all groups showed increase in BMD after 6 and 12 months. Bone metabolic markers at baseline were correlated with %change in lumbar spine BMD from baseline to 12 months. P1NP and 25-hydroxy vitamin D levels at baseline were identified as potential predictors of development of acute-phase reactions. CONCLUSIONS The combination therapy of Zol or DMAb and ELD may increase BMD at 12 months after the first administration in Japanese patients with postmenopausal osteoporosis, regardless of BPs pretreatment. Bone metabolic markers at baseline may be useful predictors for reaction to the therapy and side effects caused by these combination therapies in postmenopausal osteoporosis.
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Affiliation(s)
- Yumejiro Nakamura
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Shun Shimodan
- Department of Orthopaedic Surgery, Kushiro City General Hospital, Kushiro, Japan
| | - Hotaka Ishizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Kushiro City General Hospital, Kushiro, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Masahiko Takahata
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
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12
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Shimizu T, Arita K, Murota E, Hiratsuka S, Fujita R, Ishizu H, Asano T, Takahashi D, Takahata M, Iwasaki N. Effects after starting or switching from bisphosphonate to romosozumab or denosumab in Japanese postmenopausal patients. J Bone Miner Metab 2021; 39:868-875. [PMID: 33847831 PMCID: PMC8042469 DOI: 10.1007/s00774-021-01226-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/23/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE We aimed to investigate the longitudinal changes in bone metabolic markers and bone mineral density (BMD) after starting or switching from bisphosphonate (BP) to romosozumab (ROMO) or denosumab (DENO) therapies over 12 months and to determine predictors that establish associations with changes in BMD among the patients received the ROMO therapy. METHODS Postmenopausal osteoporosis patients with a high risk of fracture-154 in total-were recruited; their therapies were switched to ROMO or DENO from BP/naïve or vitamin D (ND) (ND-ROMO: 43, BP-ROMO: 38, ND-DENO: 38, and BP-DENO: 35). Longitudinal changes in bone metabolic markers and BMD were evaluated. RESULTS ROMO groups showed significant increases in BMD of the lumbar spine at 6 and 12 months and femoral neck at 12 months compared to the DENO groups. Although BP-ROMO showed significant increase in the lumbar spine BMD compared to BP-DENO, there were no significant differences in femoral neck and total hip BMDs between BP-ROMO and BP-DENO. Among the ROMO groups, % changes of BMD from baseline to 12 months were associated with bone metabolic markers at baseline and changes in TRACP-5b from baseline to 3 months. CONCLUSIONS ROMO continuously increased BMD for 12 months and performed better than DENO. On the other hand, effects of ROMO switched from BP on BMD of femoral neck and total hip were almost same with DENO. Bone metabolic markers at baseline and changes in TRACP-5b from baseline to 3 months may predict the efficacy of ROMO after 12 months of administration.
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Affiliation(s)
- Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.
| | - Kosuke Arita
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Eihiro Murota
- Department of Orthopaedic Surgery, Wajyokai Sapporo Hospital, Sapporo, Japan
| | - Shigeto Hiratsuka
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Wajyokai Sapporo Hospital, Sapporo, Japan
| | - Ryo Fujita
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Hokkaido Orthopaedic Memorial Hospital, Sapporo, Japan
| | - Hotaka Ishizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Masahiko Takahata
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
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Abstract
After the accident at Fukushima Daiichi nuclear power plant on 11 March 2011, radioactive materials were released into the atmosphere resulting in environmental contamination. Following the implementation of environmental decontamination efforts, the Radiation Dose Registration Centre of the Radiation Effects Association established the radiation dose registration system for decontamination and related workers to consolidate and prevent the loss of radiation records. This article presents statistics on the radiation doses of decontamination and related workers using official records. Since approximately 10 years have passed since the accident in Fukushima, the types of work conducted in the affected restricted areas have changed over time. Therefore, changes in radiation dose for each type of work and comparisons with nuclear workers are presented.
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Affiliation(s)
- T Ogawa
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - T Ueno
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - T Asano
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - A Suzuki
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - A Ito
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
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Takahashi D, Noyama Y, Asano T, Shimizu T, Irie T, Terkawi MA, Iwasaki N. Finite element analysis of double-plate fixation using reversed locking compression-distal femoral plates for Vancouver B1 periprosthetic femoral fractures. BMC Musculoskelet Disord 2021; 22:276. [PMID: 33714273 PMCID: PMC7956136 DOI: 10.1186/s12891-021-04152-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 03/08/2021] [Indexed: 11/17/2022] Open
Abstract
Background Internal fixation is recommended for treating Vancouver B1 periprosthetic femoral fractures. Although several fixation procedures have been developed with high fixation stability and union rates, long-term weight-bearing constructs are still lacking. Therefore, the aim of the present study was to evaluate the stability of a double-plate procedure using reversed contralateral locking compression-distal femoral plates for fixation of Vancouver B1 periprosthetic femoral fractures under full weight-bearing. Methods Single- and double-plate fixation procedures for locking compression-distal femoral plates were analysed under an axial load of 1,500 N by finite element analysis and biomechanical loading tests. A vertical loading test was performed to the prosthetic head, and the displacements and strains were calculated based on load-displacement and load-strain curves generated by the static compression tests. Results The finite element analysis revealed that double-plate fixation significantly reduced stress concentration at the lateral plate place on the fracture site. Under full weight-bearing, the maximum von Mises stress in the lateral plate was 268 MPa. On the other hand, the maximum stress in the single-plating method occurred at the defect level of the femur with a maximum stress value of 1,303 MPa. The principal strains of single- and double-plate fixation were 0.63 % and 0.058 %, respectively. Consistently, in the axial loading test, the strain values at a 1,500 N loading of the single- and double-plate fixation methods were 1,274.60 ± 11.53 and 317.33 ± 8.03 (× 10− 6), respectively. Conclusions The present study suggests that dual-plate fixation with reversed locking compression-distal femoral plates may be an excellent treatment procedure for patients with Vancouver B1 fractures, allowing for full weight-bearing in the early postoperative period.
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Affiliation(s)
- Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Japan.
| | - Yoshihiro Noyama
- Department of Pharmaceutical Affairs Division, Teijin Nakashima Medical Company Limited, 688-1, Joto-Kitagata, Higashi-ku, Okayama, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Japan
| | - Tohru Irie
- Department of Orthopaedic Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Japan
| | - Mohamad Alaa Terkawi
- Department of Orthopaedic Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, Japan
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15
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Yokota S, Sakamoto K, Shimizu Y, Asano T, Takahashi D, Kudo K, Iwasaki N, Shimizu T. Evaluation of whole-body modalities for diagnosis of multifocal osteonecrosis-a pilot study. Arthritis Res Ther 2021; 23:83. [PMID: 33706802 PMCID: PMC7947377 DOI: 10.1186/s13075-021-02473-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 03/04/2021] [Indexed: 08/26/2023] Open
Abstract
Background This study aimed to investigate the ability of whole-body bone scintigraphy (WB-BS) in the detection of multifocal osteonecrosis (ON) compared to whole-body magnetic resonance imaging (WB-MRI) and to clarify the characteristics of patients with multifocal ON among those with ON of the femoral head (ONFH) using WB-MRI. Methods Forty-six patients who had symptomatic ONFH and underwent surgery in our hospital from April 2019 to October 2020 were included in the study. Data on patient demographics, including age, sex, body mass index (BMI), history of corticosteroid intake, alcohol abuse, smoking, and symptomatic joints, were collected from their medical records. All patients underwent WB-MRI and WB-BS before surgery. Results The agreement in the detection of ON by WB-MRI vs the uptake lesions by WB-BS in the hip joints was moderate (κ = 0.584), while that in other joints was low (κ < 0.40). Among the 152 joints with ON detected by WB-MRI, 92 joints (60.5%) were symptomatic, and 60 joints (39.5%) were asymptomatic. Twelve out of the 46 (26.0%) patients had multifocal (three or more distinct anatomical sites) ON. Nonetheless, while WB-BS detected symptomatic ON detected by WB-MRI as uptake lesions in 82.6% (76/92) of the joints, asymptomatic ON detected by WB-MRI was detected as uptake lesions in 21.7% (13/60) of the joints. All patients with multifocal ON had a history of steroid therapy, which was significantly higher than that in patients with oligofocal ON (P = 0.035). The patients with a hematologic disease had multifocal ON at a higher rate (P = 0.015). Conclusions It might be difficult for WB-BS to detect the asymptomatic ON detected by WB-MRI compared to symptomatic ON. Considering the cost, examination time, and radiation exposure, WB-MRI might be useful for evaluating multifocal ON. Larger longitudinal studies evaluating the benefits of WB-MRI for detecting the risk factors for multifocal ON are required.
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Affiliation(s)
- Shunichi Yokota
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Keita Sakamoto
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Yukie Shimizu
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan.,Department of advanced diagnostic imaging development, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Kohsuke Kudo
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan.
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Takahashi K, Shimizu T, Asano T, Terkawi MA, Iwasaki N, Takahashi D. Long-Term Clinical and Radiological Outcomes of Primary Total Hip Arthroplasty with Modular Femoral Stem in Middle-Aged Asian Patients. J Arthroplasty 2020; 35:3650-3655. [PMID: 32718667 DOI: 10.1016/j.arth.2020.06.079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND There is insufficient information regarding the outcome of primary total hip arthroplasty (THA) with the modular femoral stem in middle-aged patients. This study aimed to assess long-term clinical and radiological outcomes of primary THA using the original or modified modular hip system (S-ROM) in middle-aged Asian patients. METHODS A retrospective review identified 98 primary THAs that used a modular stem and were undertaken between 1997 and 2009 in patients younger than 58 years, for whom at least 5 years of follow-up data were available. Clinical data and radiograph assessments were reviewed to analyze differences between the original and modified modular stem groups. RESULTS The mean patient follow-up duration was 148.3 months, and the follow-up ratio was 89.1%. The Kaplan-Meier analysis revealed that the survival rate of both stems was 98.9% at 10 years and 89.8% at 15 years. Although no statistically significant differences in the survival rate were observed between the stem designs, the original stem group had increased incidence of thigh pain compared with the modified stem group. In total, 12 and 54 hips showed change in stem alignment and osteolysis, respectively. CONCLUSION The findings of this study show that the modular stems have a high survival rate, and results suggest positive outcomes among the Asian population over the long term. Although there were very few differences between the stem designs, the results suggest that the modified modular stem could prevent thigh pain and that selection of the implant based on the bone shape is important for THA.
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Affiliation(s)
- Kaname Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Mohamad Alaa Terkawi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Onuki T, Shoji M, Kikuchi M, Asano T, Suzuki H, Tannno K, Shinke T. Clinical risk predictors for bradycardia, supraventricular tachycardia and epilepsy necessitating therapy in patients with unexplained syncope monitored by insertable cardiac monitor. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Insertable cardiac monitors (ICMs) allow for lengthy monitoring of cardiac rhythm and improve diagnostic yield in patients with unexplained syncope. In most cardiac syncope cases, sick sinus syndrome, atrioventricular block, and paroxysmal supraventricular tachycardia (SVT) are detected using ICMs. On the other hand, epileptic seizures are sometimes diagnosed as unexplained syncope because in these situations, the loss of consciousness is a similar manifestation. Thus, the population of patients with unexplained syncope monitored by ICMs includes epileptic patients. Clinical risk factors for bradycardia, SVT and epilepsy that necessitate therapy in patients with unexplained syncope are not well known. If these risks can be clarified, clinicians could provide more specific targeted monitoring.
Purpose
We aimed to identify these predictors.
Methods
We retrospectively reviewed medical records of consecutive patients who received ICMs to monitor unexplained syncope in three medical facilities. We performed Cox's stepwise logistic regression analysis to identify significant independent risk factors for bradycardia, SVT, and epilepsy.
Results
One hundred thirty-two patients received ICMs to monitor unexplained syncope. During the 17-month follow-up period, 19 patients (10 patients had sick sinus syndrome and 9 had atrioventricular block) needed pacemaker for bradycardia; 8 patients (3 had atrial flutter, 4 had atrial tachycardia, and 1 had paroxysmal atrial fibrillation) needed catheter ablation for SVT; and 9 patients needed antiepileptic agents from the neurologist.Stepwise logistic regression analysis indicated that syncope during effort (odds ratio [OR] = 3.41; 95% confidence interval [CI], 1.21 to 9.6; p=0.02) was an independent risk factor for bradycardia. Palpitation before syncope (OR = 9.46; 95% CI, 1.78 to 50.10; p=0.008) and history of atrial fibrillation (OR = 10.1; 95% CI, 1.96 to 52.45; p=0.006) were identified as significant independent prognostic factors for SVT. Syncope while supine (OR = 11.7; 95% CI, 1.72 to 79.7; p=0.01) or driving (OR = 15.6; 95% CI, 2.10 to 115.3; p=0.007) was an independent factor for epileptic seizure.
Conclusions
ICMs are useful devices for diagnosing unexplained syncope. Palpitation, atrial fibrillation and syncope during effort were independent risk factors for bradycardia and for SVT. Syncope while supine or driving was an independent risk factor for epilepsy. We should carefully follow up of patients with these risk factors.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Onuki
- Showa University Hospital, Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - M Shoji
- Showa University Hospital, Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - M Kikuchi
- Cardiovascular Center, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - T Asano
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Kanagawa, Japan
| | - H Suzuki
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Kanagawa, Japan
| | - K Tannno
- Cardiovascular Center, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - T Shinke
- Showa University Hospital, Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
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18
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Asano T, Mitsuhashi Y, Yamashita J, Ito R, Saji M, Wakabayashi K, Yahagi K, Shinke T, Mase T, Miyachi H, Higuchi S, Miyauchi K, Yamamoto T, Nagao K, Takayama M. Relationship between age and the impact of revascularization on mortality in patients with non-ST-elevation myocardial infarction. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1766] [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: 11/13/2022] Open
Abstract
Abstract
Background
It is known that the early coronary revascularization in patients with non-ST-elevation myocardial infarction (NSTEMI) was associated with favorable clinical outcomes. However, it is still unclear whether this efficacy is equivalent over all the ages of the patients.
Methods
Patients with NSTEMI were screened from the database of the Tokyo CCU network registry. Of those, the patients treated without revascularization (medical treatment) were matched with the patients receiving revascularization by propensity score matching. The probabilities of in-hospital death were calculated in the logistic regression model. In two subgroups stratified according to median of the age (elderly and non-elderly subgroups), the odds ratios of revascularization for in-hospital death were calculated.
Results
In the patients registered between 2013 and 2017, 4,851 patients with NSTEMI were identified. After the screening, 370 patients with medical treatment were matched with 370 patients treated with revascularization. The incidence of in-hospital death was significantly higher in the patients with medical treatment (20.3% vs 13.0%, P=0.01). The two probability curves of in-hospital death in patients with and without revascularization converged as age increased. In the elderly subgroup, the revascularization was not significantly associated with favorable outcome of mortality, whereas it had a significant impact on mortality in the non-elderly subgroup (odds ratio: 0.47 [95% CI 0.23–0.95]).
Conclusion
The impact of revascularization on short-term mortality in patients with NSTEMI tended to be reduced as age increased.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Asano
- Tokyo CCU Network, Tokyo, Japan
| | | | | | - R Ito
- Tokyo CCU Network, Tokyo, Japan
| | - M Saji
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | - T Mase
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | | | - K Nagao
- Tokyo CCU Network, Tokyo, Japan
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Asano T, Mitsuhashi Y, Sachi M, Wakabayashi K, Yahagi K, Shinke T, Mase T, Miyachi H, Tujiguchi S, Yamashita J, Yamazaki M, Miyauchi K, Yamamoto T, Nagao K, Takayama M. The impact of low diastolic blood pressure on 30-day mortality of patients with acute myocardial infarction. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1652] [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: 11/13/2022] Open
Abstract
Abstract
Background
It is known that low diastolic blood pressure (DBP) is associated with long-term cardiovascular events after acute myocardial infarction (AMI). However, the impact of low diastolic blood pressure on short-term outcome has not yet been well investigated.
Methods and results
We included 15,208 patients who were hospitalized for AMI and registered in the Tokyo CCU network registry between 2013 and 2016. Thirty-day in-hospital mortality rate was 4.8% (728/15,208). To assess the relationship between DBP at the time of admission and 30-day mortality non-linearly, spline regression model was applied with the stratification of the cohort according to tercile of systolic blood pressure (SBP, low:≤122 mmHg, intermediate:123–148 mmHg, high:≥149 mmHg) and J-curve phenomenon was observed in the low and high SBP groups. In multivariate logistic regression analysis, adjusted odds ratio of the lowest quintile of DBP (≤64 mmHg) was 1.65 (95% CI:1.02–2.66) in low SBP group and 4.55 (95% CI:1.72–12.00) in high SBP group.
Conclusion
Low DBP was associated with increased 30-day in-hospital mortality rate after AMI even in patients with high SBP.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Asano
- Tokyo CCU Network, Tokyo, Japan
| | | | - M Sachi
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | - T Mase
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | | | | | | | - K Nagao
- Tokyo CCU Network, Tokyo, Japan
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Asano T, Ono M, Saito A, Kanie T, Takaoka T, Komiyama N. Twenty-year trends in clinical outcome of randomized controlled trial for coronary intervention: systematic review and meta-regression analysis of 46 randomized controlled trials. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Aim
The technology of percutaneous coronary intervention (PCI) has been developed after the advent of coronary stent. However, the impact of the technological development on clinical outcomes is still unclear, whereas a remarkable improvement of clinical outcomes after PCI has not been observed in the trials comparing to medical therapy or coronary bypass graft. The current analysis aims to investigate trends in clinical outcomes after PCI after the emargence of coronary stent, using the randomized controlled trials (RCTs) comparing coronary stents.
Methods and results
We performed a systematic review of RCTs investigating coronary stents in non-specific population (excluding the trials particularly enrolling diabetic or myocardial infarction etc.) conducted between 1996 and 2015 (publication between 1997 and 2019) with independent clinical event adjudication. The random-effect meta-regression analysis including 90 arms with 94,831 patients in 46 RCTs was performed investigating the 20-year trends in clinical outcomes such as death, cardiac death, myocardial infarction, target lesion revascularization (TLR) and stent thrombosis at one and five years after the index procedure. The sensitivity analysis was performed by limiting to 20 all comer trials. In the meta-regression analysis, we did not observe significant change in the incidences of cardiac death and myocardial infarction after PCI over 20 years (P values for cardiac death: 0.666 at one year, 0.256 at five years and P values for myocardial infarction: 0.121 at one year, 0.376 at five years; R2 for cardiac death: <0.01 at one year and five years and R2 for myocardial infarction: <0.01 at one year and five years), whereas the incidences of clinically indicated TLR (P value <0.001, R2 = 0.40 at one year, P value = 0.002, R2 = 0.22 at five years) and stent thrombosis were decreased steeply in the first decade and slightly in the second decade (P value = 0.040, R2 = 0.09 at one year; P value = 0.017, R2 = 0.17 at five year). The sencitivity analysis limiting all-comer population revealed the consistent results.
Conclusion
The development of PCI had an impact on the 20-year trends in TLR and ST, despite there were no trends in the cardiac death and myocardial infarction.
Trends in the incidence of the outcomes
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- T Asano
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - M Ono
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - A Saito
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - T Kanie
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - T Takaoka
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - N Komiyama
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
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21
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Nonokawa M, Shimizu T, Yoshinari M, Hashimoto Y, Nakamura Y, Takahashi D, Asano T, Nishibata Y, Masuda S, Nakazawa D, Tanaka S, Tomaru U, Iwasaki N, Ishizu A. Association of Neutrophil Extracellular Traps with the Development of Idiopathic Osteonecrosis of the Femoral Head. Am J Pathol 2020; 190:2282-2289. [PMID: 32702358 DOI: 10.1016/j.ajpath.2020.07.008] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/07/2020] [Accepted: 07/09/2020] [Indexed: 11/30/2022]
Abstract
Idiopathic osteonecrosis of the femoral head (ONFH) is defined as necrosis of osteocytes due to a non-traumatic ischemia of the femoral head. Iatrogenic glucocorticoid administration and habitual alcohol intake are regarded as risk factors. It has been suggested that glucocorticoid-induced activation of platelets contributes to the local blood flow disturbance of the femoral head. Both activated platelets and alcohol can induce neutrophil extracellular traps (NETs). To determine the association of NETs with the development of idiopathic ONFH, surgically resected femoral heads of patients with idiopathic ONFH and osteoarthritis were assessed for existence of NET-forming neutrophils by immunofluorescence staining. NET-forming neutrophils were present in small vessels surrounding the femoral head of patients with idiopathic ONFH but not osteoarthritis. Moreover, Wistar-Kyoto rats were intravenously injected with NET-forming neutrophils or neutrophils without NET induction, and then the ischemic state of the tissue around the femoral head was evaluated by immunohistochemistry for hypoxia-inducible factor-1α. NET-forming neutrophils circulated into the tissue around the femoral head, and hypoxia-inducible factor-1α expression in the tissue was higher compared with that of rats intravenously administered with neutrophils without NET induction. Furthermore, ischemic change of osteocytes was observed in the femoral head of rats given an i.v. injection of NET-forming neutrophils. The collective findings suggest that NETs are possibly associated with the development of idiopathic ONFH.
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Affiliation(s)
- Mayu Nonokawa
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Tomohiro Shimizu
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Miku Yoshinari
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Yamato Hashimoto
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Yusuke Nakamura
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Daisuke Takahashi
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tsuyoshi Asano
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yuka Nishibata
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Sakiko Masuda
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Daigo Nakazawa
- Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Satoshi Tanaka
- Center for Cause of Death Investigation, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Utano Tomaru
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akihiro Ishizu
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
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Okubo K, Asano T, Sato A. Simvastatin augments anticancer activity of romidepsin in bladder cancer cells by causing AMP-activated protein kinase activation and histone acetylation. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32620-3] [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: 10/23/2022] Open
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Shimizu T, Yokota S, Kimura Y, Asano T, Shimizu H, Ishizu H, Iwasaki N, Takahashi D. Predictors of cartilage degeneration in patients with subchondral insufficiency fracture of the femoral head: a retrospective study. Arthritis Res Ther 2020; 22:150. [PMID: 32571393 PMCID: PMC7310243 DOI: 10.1186/s13075-020-02243-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/09/2020] [Indexed: 11/30/2022] Open
Abstract
Background There is evidence that the cause of primary osteoarthritis (OA) is related to the changes in subchondral bone; however, the influence of subchondral insufficiency fracture (SIF) of the femoral head on the degeneration of the hip joint and the prognostic factors related to joint degeneration remain unclear. The objectives of this study were (1) to investigate the natural history of joint space width after the occurrence of SIF and (2) to investigate the associations between joint space narrowing and bone metabolic markers as well as magnetic resonance imaging (MRI) among the patients with SIF. Methods Between January 2010 and December 2019, 238 patients in whom band pattern of the femoral head were observed on MRI visited Hokkaido University Hospital. Among these patients, 44 hips in 41 patients were diagnosed with SIF and eligible for this retrospective study. We evaluated the joint space width (JSW) of the hip on the radiograph obtained at the first and last visits, length of the band lesion on MRI, bone mineral density by dual-energy X-ray absorptiometry, and bone metabolism markers. Similarly, the factors associated with the necessity of surgery and the progression of the narrowing of the joint space were evaluated. Results Fifteen of the 44 hips required total hip arthroplasty (THA). A significant decrease was observed in the JSW from the first visit to the final follow-up. Changes in the JSW were associated with the length of band patterns, serum type 1 procollagen-N-propeptide (P1NP), and tartrate-resistant acid phosphatase 5b (TRACP-5b) during diagnosis. Additionally, bone metabolic markers tended to be associated with the length of the band pattern. Conclusions SIF could cause joint space narrowing and hip OA. In addition to MRI findings as prognostic predictors of SIF, as previously described, bone metabolic markers were equally associated with changes in JSW, suggesting that these parameters could be useful in predicting the prognosis of SIF. Considering that bone metabolic markers trended to be associated with the length of band pattern, they might reflect the local severity.
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Affiliation(s)
- Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Shunichi Yokota
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Yosuke Kimura
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Hirokazu Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Hotaka Ishizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan.
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24
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Shimodan S, Sato D, Takahashi K, Nakamura Y, Hyakkan R, Watanabe T, Hishimura R, Ota M, Shimizu H, Hojo Y, Hasegawa Y, Chubachi T, Yasui K, Tsujimoto T, Tsukuda Y, Asano T, Takahashi D, Takahata M, Iwasaki N, Shimizu T. Ten years change in post-fracture care for hip fracture patients. J Bone Miner Metab 2020; 38:222-229. [PMID: 31583538 DOI: 10.1007/s00774-019-01047-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 04/10/2019] [Accepted: 09/03/2019] [Indexed: 11/26/2022]
Abstract
INTRODUCTION This multicenter, retrospective study aimed to clarify the changes in postoperative care provided by orthopaedic surgeons after hip fractures and clarify the incidence of secondary fractures requiring surgery. MATERIALS AND METHODS Subjects were patients with hip fracture treated surgically in seven hospitals during the 10-year period from January 2008 to December 2017. Data on patient demographics, comorbidities, preoperative and postoperative osteoporosis treatments, and secondary fractures were collected from the medical records. RESULTS In total, 4764 new hip fractures in 982 men and 3782 women (mean age: 81.3 ± 10.0 years) were identified. Approximately 10% of patients had a history of osteoporosis drug treatment and 35% of patients received postoperative drug treatment. The proportion of patients receiving postoperative drug therapy increased by approximately 10% between 2009 and 2010, 10% between 2010 and 2011, and 10% between 2011 and 2013. Although the rate of secondary fractures during the entire period and within 3 years decreased from 2011, the rate of secondary fracture within 1 year remained at around 2% every year. CONCLUSIONS The approval of new osteoporosis drugs and the establishment of osteoporosis liaison services have had a positive effect on the use of postoperative drug therapy in the orthopedic field. Our finding that the rate of secondary fracture within 1 year of the initial fracture remained around 2% every year, despite improvements in postoperative drug therapy, suggests that both rehabilitation for preventing falls and early postoperative drug therapy are essential to prevent secondary fractures.
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Affiliation(s)
- Shun Shimodan
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Kushiro City General Hospital, Kushiro, Hokkaido, Japan
| | - Dai Sato
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Iwamizawa City Hospital, Iwamizawa, Hokkaido, Japan
| | - Kaname Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Hakodate General Central Hospital, Hakodate, Hokkaido, Japan
| | - Yumejiro Nakamura
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Hakodate General Central Hospital, Hakodate, Hokkaido, Japan
| | - Ryota Hyakkan
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Hakodate General Central Hospital, Hakodate, Hokkaido, Japan
| | - Takamasa Watanabe
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Hakodate General Central Hospital, Hakodate, Hokkaido, Japan
| | - Ryosuke Hishimura
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Ebetsu City Hospital, Ebetsu, Hokkaido, Japan
| | - Masahiro Ota
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Hokushokai Hospital, Iwamizawa, Hokkaido, Japan
| | - Hirokazu Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Kushiro Rosai Hospital, Kushiro, Hokkaido, Japan
| | - Yoshihiro Hojo
- Department of Orthopaedic Surgery, Kushiro Rosai Hospital, Kushiro, Hokkaido, Japan
| | - Yuichi Hasegawa
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Obihiro Kosei Hospital, Obihiro, Hokkaido, Japan
| | - Toshiya Chubachi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Obihiro Kosei Hospital, Obihiro, Hokkaido, Japan
| | - Keigo Yasui
- Department of Orthopaedic Surgery, Obihiro Kosei Hospital, Obihiro, Hokkaido, Japan
| | - Takeru Tsujimoto
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Otaru City Hospital, Otaru, Hokkaido, Japan
| | - Yukinori Tsukuda
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
- Department of Orthopaedic Surgery, Otaru City Hospital, Otaru, Hokkaido, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Masahiko Takahata
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan.
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Shindo Y, Kuribara H, Matsuoka T, Futo S, Sawada C, Shono J, Akiyama H, Goda Y, Toyoda M, Hino A, Asano T, Hiramoto M, Iwaya A, Jeong SI, Kajiyama N, Kato H, Katsumoto H, Kim YM, Kwak HS, Ogawa M, Onozuka Y, Takubo K, Yamakawa H, Yamazaki F, Yoshida A, Yoshimura T. Validation of Real-Time PCR Analyses for Line-Specific Quantitation of Genetically Modified Maize and Soybean UsingNew Reference Molecules. J AOAC Int 2019. [DOI: 10.1093/jaoac/85.5.1119] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Novel analytical methods based on real-time quantitative polymerase chain reactions by use of new reference molecules were validated in interlaboratory studies for the quantitation of genetically modified (GM) maize and soy. More than 13 laboratories from Japan, Korea, and the United States participated in the studies. The interlaboratory studies included 2 separate stages: (1) measurement tests of coefficient values, the ratio of recombinant DNA (r-DNA) sequence, and endogenous DNA sequence in the seeds of GM maize and GM soy; and (2) blind tests with 6 pairs of maize and soy samples, including different levels of GM maize or GM soy. Test results showed that the methods are applicable to the specific quantitation of the 5 lines of GM maize and one line of GM soy. After statistical treatment to remove outliers, the repeatability and reproducibility of these methods at a level of 5.0% were <13.7 and 15.9%, respectively. The quantitation limits of the methods were 0.50% for Bt11, T25, and MON810, and 0.10% for GA21, Event176, and Roundup Ready soy. The results of blind tests showed that the numerical information obtained from these methods will contribute to practical analyses for labeling systems of GM crops.
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Affiliation(s)
- Yoichiro Shindo
- Fundamental Research Laboratory, Asahi Breweries Ltd., 1-1-21 Midori, Moriya, Kitasoma-gun, Ibaraki 302-0106, Japan
| | - Hideo Kuribara
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Takeshi Matsuoka
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Satoshi Futo
- FASMAC Co., Ltd., 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Chihiro Sawada
- Japan Frozen Foods Inspection Corp., Nishi-1 Koyo, Higashinada-ku, Kobe, Hyogo 658-0033, Japan
| | - Jinji Shono
- Somatech Center, House Foods Co., 1-4 Takanodai, Yotsukaido, Chiba 284-0033, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Yukihiro Goda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Masatake Toyoda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Akihiro Hino
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Dai Z, Asano T, Ohde S, Komiyama N. P1643An exploratory analysis for the optimal monitoring interval of N-terminal pro-B-type natriuretic peptide in patients with stable heart failure. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0402] [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: 11/13/2022] Open
Abstract
Abstract
Background
N-terminal pro-B-type natriuretic peptide (NT-proBNP) is a potential biomarker for monitoring the status of heart failure. However, the optimal monitoring interval is unknown. This study aims to investigate minimal informative monitoring interval of NT-proBNP in patients with stable chronic heart failure.
Methods
In this retrospective open cohort study, adult patients followed up at a tertiary hospital for chronic heart failure with NT-proBNP measurements were included if they had been previously admitted due to acute heart failure and were free from readmission over 6 months after discharge. We analyzed NT-proBNP measured between 6 months after discharge and the timepoint of an alteration of medication regimen or readmission due to worsening of heart failure. To distinguish actual progression of the disease from biological variability and measurement error, the signal-to-noise ratio method was applied with a random-effects model. Stratified analysis was performed according to underlying risks.
Results
In this analysis, 368 patients were included with NT-proBNP measured between July 2009 and December 2017. The patients had 6.0 times of NT-proBNP measurements in median (interquartile range [IQR] 4.0–10.0) during the follow-up period (median 12.0 months [IQR 6.0–27.0]). In the estimates of the random-effects model, signal (i.e. actual progression of the disease) exceeded noise (i.e. biological variability and measurement error) at 8.1 months (95% confidence interval [CI]: 5.7–10.1) after the index measurement. In a subgroup analysis according to the AHEAD risk score, the minimal informative monitoring interval was shortened as the risk score increased (0–1 point: 12.3 months [95% CI: 10.3–14.5]; 2–3 points: 8.0 months [95% CI: 6.8–9.7]; 4–5 points: 3.3 months [95% CI: 3.0–3.8]; Figure).
Informative intervals stratified by risk
Conclusion
In patients with stable chronic heart failure, the overall minimal informative monitoring interval of NT-proBNP measurement was 8.1 months, which varies by underlying risk. The optimal monitoring interval could be lengthened especially for patients at lower risk.
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Affiliation(s)
- Z Dai
- St. Luke's International Hospital, Department of Cardiology, Tokyo, Japan
| | - T Asano
- St. Luke's International Hospital, Department of Cardiology, Tokyo, Japan
| | - S Ohde
- St. Luke's International University, Graduate School of Public Health, Tokyo, Japan
| | - N Komiyama
- St. Luke's International Hospital, Department of Cardiology, Tokyo, Japan
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Arakawa T, Norimoto S, Iwakiri S, Asano T, Niimi Y. Cavity resonator for circularly polarized microwave irradiation mounted on a cryostat. Rev Sci Instrum 2019; 90:084707. [PMID: 31472660 DOI: 10.1063/1.5098846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/07/2019] [Indexed: 06/10/2023]
Abstract
We have constructed a cylindrical cavity resonator with a hybrid coupler where circularly polarized microwaves can be irradiated to a sample. The polarity of the microwave can be switched by changing the input ports of the hybrid coupler. The cavity resonator is small enough to be mounted on a cryostat which enables us to change the sample temperature in a wide range. To demonstrate the performance of the cavity resonator mounted on a cryostat, Yttrium Iron Garnet (YIG) was used as a test sample. We succeeded in selectively exciting left and right circularly polarized modes with high polarization (>80%). We also evaluated the susceptibility tensor of YIG in the cryostat. The technique presented here would offer a new direction in the fields of spintronics and quantum information.
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Affiliation(s)
- T Arakawa
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Norimoto
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Iwakiri
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Asano
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Niimi
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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Irie T, Takahashi D, Asano T, Shimizu T, Arai R, Terkawi AM, Ito YM, Iwasaki N. Effects of femoral bone defect morphology on initial polished tapered stem stability in massive defect model: a biomechanical study. BMC Musculoskelet Disord 2019; 20:355. [PMID: 31370807 PMCID: PMC6670119 DOI: 10.1186/s12891-019-2716-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 07/11/2019] [Indexed: 11/13/2022] Open
Abstract
Background Good outcomes have been reported in revision total hip replacement with massive segmental defects using impaction bone grafting with circumferential metal meshes. However, the morphology of defects that require a mesh is poorly defined. The purpose of this study was to evaluate the effects of a variety of segmental defects on load transmission to the proximal femur under both axial and rotational loads. Methods Initial stability of the Exeter stem was investigated in a composite bone model using three medial bone defect morphologies: Long (length 5 cm × width 2 cm), Short (2.5 cm × 2 cm), Square (3.2 cm × 3.2 cm), Square with mesh (3.2 cm × 3.2 cm defect covered with metal mesh), and with no defect as control. Specimens (5 per group) were axially loaded and internally rotated up to 20° or to failure. Strain distributions of the femora were measured using a strain gauge. Results All Square group specimens failed while rotation was increasing. In the other four groups, failure was not observed in any specimens. Mean torsional stiffness in the Long (4.4 ± 0.3 Nm/deg.) and Square groups (4.3 ± 0.3 Nm/deg.) was significantly smaller than in the Control group (4.8 ± 0.3 Nm/deg.). In the medio-cranial region, the magnitude of the maximum principal strain in the Square group (1176.4 ± 100.9) was significantly the largest (Control, 373.2 ± 129.5, p < 0.001; Long, 883.7 ± 153.3, p = 0.027; Short, 434.5 ± 196.8, p < 0.001; Square with mesh, 256.9 ± 100.8, p < 0.001). Torsional stiffness, and both maximum and minimum principal strains in the Short group showed no difference compared to the Control group in any region. Conclusions Bone defect morphology greatly affected initial stem stability and load transmission. If defect morphology is not wide and the distal end is above the lower end of the lesser trochanter, it may be acceptable to fill the bone defect region with bone cement. However, this procedure is not acceptable for defects extending distally below the lower end of the lesser trochanter or defects 3 cm or more in width.
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Affiliation(s)
- Tohru Irie
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Ryuta Arai
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Alaa Muhammad Terkawi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Yoichi M Ito
- Department of Biostatistics, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
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Asano T, Shimizu T, Takahashi D, Ota M, Sato D, Hamano H, Hiratsuka S, Takahata M, Iwasaki N. Potential association with early changes in serum calcium level after starting or switching to denosumab combined with eldecalcitol. J Bone Miner Metab 2019; 37:351-357. [PMID: 29721807 DOI: 10.1007/s00774-018-0928-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 02/08/2018] [Accepted: 04/03/2018] [Indexed: 11/30/2022]
Abstract
The aims of this study are to investigate changes in serum calcium (Ca) level after switching from either non-therapy, bisphosphonate, selective estrogen receptor modulators (SERM) or teriparatide treatments to a combination therapy of denosumab (DMAb), and eldecalcitol, and the association between early changes in serum calcium and changes in bone metabolic markers and bone mineral density (BMD). 129 patients with postmenopausal osteoporosis (32 non-pretreatment, 50 bisphosphonates, 18 SERM, and 29 teriparatide) were recruited and switched to DMAb plus eldecalcitol. Serum calcium levels, bone metabolism markers, and BMD measurements of the lumbar spine and femoral neck were evaluated. All groups showed an increase in BMD 6 months and 1 year after DMAb administration compared to baseline via suppression of bone metabolism markers. The TPD group showed a significant decrease in serum calcium level 1 week after the first injection of DMAb and eldecalcitol compared to baseline and the bisphosphonate group. Changes in serum calcium level from baseline to 1 week after the first injection of DMAb trended to correlate with changes in bone metabolism markers and lumbar BMD. The risks of DMAb-induced hypocalcemia are different between starting and switching from bone resorption inhibitors and bone formation promoters. Therefore, appropriate assessment before administration of DMAb, including pretreatment therapy as well as serum Ca and bone metabolic markers will help identify the risk of hypocalcemia following DMAb in combination with eldecalcitol. Our findings also showed that early change in serum Ca level after DMAb initiation could potentially predict the efficacy for therapy reaction.
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Affiliation(s)
- Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Masahiro Ota
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
- Department of Orthopaedic Surgery, Hokushokai Hospital, Iwamizawa, Japan
| | - Dai Sato
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
- Department of Orthopaedic Surgery, Iwamizawa City Hospital, Iwamizawa, Japan
| | - Hiroki Hamano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Shigeto Hiratsuka
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Masahiko Takahata
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
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Shimizu H, Shimizu T, Takahashi D, Asano T, Arai R, Takakuwa Y, Iwasaki N. Corticosteroid dose increase is a risk factor for nonalcoholic fatty liver disease and contralateral osteonecrosis of the femoral head: a case report. BMC Musculoskelet Disord 2019; 20:88. [PMID: 30782153 PMCID: PMC6381694 DOI: 10.1186/s12891-019-2468-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 02/13/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The incidence of bilateral corticosteroid-induced osteonecrosis of the femoral head (ONFH) is high. Although the precise mechanism of corticosteroid-induced ONFH development is unclear, hepatic enzyme abnormalities such as low activity of hepatic cytochrome P450 3A could be one cause. Herein, we report the case of a patient who developed ONFH in the contralateral hip after the dose of corticosteroids for idiopathic thrombocytopenic purpura was increased. Liver biopsy was done to rule out autoimmune hepatitis. CASE PRESENTATION A 32-year-old woman had been treated with continuous corticosteroids of up to 10 mg/day for Sjögren's syndrome for 25 years and corticosteroid-induced ONFH in the left side. At age 33, idiopathic thrombocytopenia developed, which was treated by increasing the corticosteroid dose (40 mg/day). Two months later, liver enzyme level began to increase slightly and continued to increase. A year after corticosteroid dose increase, contralateral ONFH developed, and a liver biopsy demonstrated nonalcoholic fatty liver disease (NAFLD). CONCLUSIONS The current case indicates that corticosteroid dose increase is a potential risk factor for NAFLD and contralateral ONFH. Therefore, it would be useful and important for to screen and monitor patients with hepatic enzyme abnormality for ONFH occurrence.
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Affiliation(s)
- Hirokazu Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Ryuta Arai
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Yasunari Takakuwa
- Department of Pathology, Sapporo Medical Center NTT EC, Nippon Telegraph and Telephone East Corporation, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
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Asano T, Takahashi D, Shimizu T, Irie T, Arai R, Terkawi MA, Iwasaki N. A mathematical model for predicting postoperative leg shortening after curved intertrochanteric varus osteotomy for osteonecrosis of the femoral head. PLoS One 2018; 13:e0208818. [PMID: 30562353 PMCID: PMC6298649 DOI: 10.1371/journal.pone.0208818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 11/24/2018] [Indexed: 11/19/2022] Open
Abstract
Despite good clinical outcomes associated with curved intertrochanteric varus osteotomy for the treatment of osteonecrosis of the femoral head, post-operative leg-length discrepancy is frequently reported and might reduce patient satisfaction. Although previous report showed that varus angulation affected post-operative leg-length discrepancy, sufficient varus angulation is the most important factor for obtaining a lateral intact portion. Therefore, to ensure better postoperative outcomes, detection of other parameters associated with leg shortening may prove useful. This study aimed to detect other factors influencing post-operative leg-length discrepancy and to develop a theory for pre-operative planning. The study included 42 hips of 36 patients with osteonecrosis of the femoral head [25 men and 11 women; mean age at the time of surgery, 33.8 years (range, 17 to 53 years)]. Patients were assessed their clinical and radiological results bofore and after surgery. Additionally, a mathematical model was developed to predict leg shortening after curved intertrochanteric varus osteotomy based on the degree of varus angulation and the distance between the femoral head and osteotomy arc centers. Predicted and actual leg shortening in patients were compared to verify the accuracy of our model. Post-operatively, mean varus angle was 21.7° (range, 15 to 38°) and mean leg shortening was 1.7 mm (range, -5.1 to 11.4 mm). Univariate analysis showed that varus angulation and lateral shift of the osteotomy arc might influence the degree of leg shortening. Furthermore, mathematically predicted leg shortening significantly correlated with actual leg shortening (r = 0.905, p < 0.001), suggesting the usefulness of our model for predicting complications of curved intertrochanteric varus osteotomy. This study indicates the importance of not positioning the center of the osteotomy arc lateral from the center of the femoral head to minimize leg shortening after curved intertrochanteric osteotomy.
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Affiliation(s)
- Tsuyoshi Asano
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
- * E-mail:
| | - Daisuke Takahashi
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tomohiro Shimizu
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tohru Irie
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ryuta Arai
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mohamad Alaa Terkawi
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Norimasa Iwasaki
- Department of Orthopedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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Modolo R, Collet C, Miyazaki Y, Chichareon P, Asano T, Katagiri Y, Tenekecioglu E, Walsh S, Lesiak M, Moreno R, Escaned J, Banning A, Onuma Y, Serruys PW. P2639Clinical outcomes with the state-of-the-art PCI for the treatment of bifurcation lesions: a sub-analysis of the SYNTAX II study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R Modolo
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - Y Miyazaki
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - P Chichareon
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - T Asano
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - Y Katagiri
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - E Tenekecioglu
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - S Walsh
- Belfast Health and Social Care Trust, Department of Cardiology, Belfast, United Kingdom
| | - M Lesiak
- Poznan University of Medical Sciences, Department of Cardiology, Poznan, Poland
| | - R Moreno
- University Hospital La Paz, Department of Cardiology, Madrid, Spain
| | - J Escaned
- Hospital Clinic San Carlos, Department of Cardiology, Madrid, Spain
| | - A Banning
- John Radcliffe Hospital, Department of Cardiology, Oxford, United Kingdom
| | - Y Onuma
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - P W Serruys
- Imperial College London, Department of Cardiology, London, United Kingdom
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Asano T, Onuma Y, Escaned J, Van Der Schaaf R, Van Geuns R, Piek J, Serruys P. P3627The assessment of microvascular resistance and conductance three years after the implantation of Absorb bioresorbable vascular scaffold and Xience metallic stent: ABSORB II pressure-velocity substudy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3627] [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] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Asano
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J Escaned
- Hospital Clinic San Carlos, Madrid, Spain
| | | | - R Van Geuns
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J Piek
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - P Serruys
- Imperial College London, London, United Kingdom
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Asano T, Onuma Y, Collet C, Sabate M, Morice M, Chevalier B, Windecker S, Serruys P. P573Angiographic late lumen loss revisited: impact on target lesion revascularization and device thrombosis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p573] [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] [Indexed: 11/13/2022] Open
Affiliation(s)
- T Asano
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - M Sabate
- Hospital Clinic de Barcelona, Barcelona, Spain
| | - M Morice
- Institut Cardiovasculaire Paris Sud, Paris, France
| | - B Chevalier
- Institut Cardiovasculaire Paris Sud, Paris, France
| | | | - P Serruys
- Imperial College London, London, United Kingdom
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Chichareon P, Collet C, Tenekecioglu E, Asano T, Katagiri Y, Miyazaki Y, Modolo R, Takahashi K, Kogame N, Onuma Y, Serruys P. P5344Clinical outcomes after primary PCI using contemporary drug eluting stents: evidence from a network meta-analysis comprising 12,639 patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5344] [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] [Indexed: 11/14/2022] Open
Affiliation(s)
- P Chichareon
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - E Tenekecioglu
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - T Asano
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Katagiri
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Miyazaki
- Erasmus Medical Center, Rotterdam, Netherlands
| | - R Modolo
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - K Takahashi
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - N Kogame
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| | - P Serruys
- Imperial College London, London, United Kingdom
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Katagiri Y, Serruys PW, Tenekecioglu E, Asano T, Collet C, Miyazaki Y, Piek JJ, Wykrzykowska J, Chevalier B, Mintz G, Onuma Y. P6374Acute and long-term relocation of minimal lumen area after Absorb bioresorbable scaffold or Xience metallic stent implantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6374] [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] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Katagiri
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - P W Serruys
- Imperial College London, London, United Kingdom
| | | | - T Asano
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - Y Miyazaki
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J J Piek
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - J Wykrzykowska
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - B Chevalier
- Institut Hospitalier Jacques Cartier, Massy, France
| | - G Mintz
- Cardiovascular Research Foundation, New York, United States of America
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
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Terkawi MA, Hamasaki M, Takahashi D, Ota M, Kadoya K, Yutani T, Uetsuki K, Asano T, Irie T, Arai R, Onodera T, Takahata M, Iwasaki N. Transcriptional profile of human macrophages stimulated by ultra-high molecular weight polyethylene particulate debris of orthopedic implants uncovers a common gene expression signature of rheumatoid arthritis. Acta Biomater 2018; 65:417-425. [PMID: 29109029 DOI: 10.1016/j.actbio.2017.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/27/2017] [Accepted: 11/02/2017] [Indexed: 01/09/2023]
Abstract
Osteolysis is a serious postoperative complication of total joint arthroplasty that leads to aseptic loosening and surgical revision. Osteolysis is a chronic destructive process that occurs when host macrophages recognize implant particles and release inflammatory mediators that increase bone-resorbing osteoclastic activity and attenuate bone-formation osteoblastic activity. Although much progress has been made in understanding the molecular responses of macrophages to implant particles, the pathways/signals that initiate osteolysis remain poorly characterized. Transcriptomics and gene-expression profiling of these macrophages may unravel key mechanisms in the pathogenesis of osteolysis and aid the identification of molecular candidates for therapeutic intervention. To this end, we analyzed the transcriptional profiling of macrophages exposed to ultra-high molecular weight polyethylene (UHMWPE) particles, the most common components used in bearing materials of orthopedic implants. Regulated genes in stimulated macrophages were involved in cytokine, chemokine, growth factor and receptor activities. Gene enrichment analysis suggested that stimulated macrophages elicited common gene expression signatures for inflammation and rheumatoid arthritis. Among the regulated genes, tumor necrosis factor superfamily member 15 (TNFSF15) and chemokine ligand 20 (CCL20) were further characterized as molecular targets involved in the pathogenesis of osteolysis. Treatment of monocyte cultures with TNFSF15 and CCL20 resulted in an increase in osteoclastogenesis and bone-resorbing osteoclastic activity, suggesting their potential contribution to loosening between implants and bone tissues. STATEMENT OF SIGNIFICANCE Implant loosening due to osteolysis is the most common mode of arthroplasty failure and represents a great challenge to orthopedic surgeons and a significant economic burden for patients and healthcare services worldwide. Bone loss secondary to a local inflammatory response initiated by particulate debris from implants is considered the principal feature of the pathogenesis of osteolysis. In the present study, we analyzed the transcriptional profiling of human macrophages exposed to UHMWPE particles and identified a large number of inflammatory genes that were not identified previously in macrophage responses to wear particles. Our data provide a new insight into the molecular pathogenesis of osteolysis and highlights a number of molecular targets with prognostic and therapeutic implications.
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Zeng Y, Zeng Y, Cavalcante R, Collet C, Tenekecioglu E, Sotomi Y, Miyazaki Y, Katagiri Y, Asano T, Abdelghani M, Nie S, Bourantas C, Bruining N, Onuma Y, Serruys P. P2398Coronary calcification as a mechanism of plaque media shrinkage a multimodality intracoronary imaging study. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2398] [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: 11/13/2022] Open
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Sano T, Nagayasu S, Suzuki S, Iwashita M, Yamashita A, Shinjo T, Sanui T, Kushiyama A, Kanematsu T, Asano T, Nishimura F. Epicatechin downregulates adipose tissue CCL19 expression and thereby ameliorates diet-induced obesity and insulin resistance. Nutr Metab Cardiovasc Dis 2017; 27:249-259. [PMID: 28062181 DOI: 10.1016/j.numecd.2016.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 08/15/2016] [Revised: 11/05/2016] [Accepted: 11/11/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Epicatechin (EC) intake has been suggested to be beneficial for the prevention of cardiovascular disorders, and it is well known that adipose tissue inflammation is one of the major risk factors for coronary heart diseases. The purpose of the present study was to determine the in vitro and in vivo effects of EC on adipose tissue inflammation and obesity. METHODS AND RESULTS DNA microarray analysis was performed to evaluate the effects of EC on gene expression in adipocytes co-cultured with bacterial endotoxin-stimulated macrophages. To determine the in vivo effects of the catechin, C57BL/6 mice were fed either a high-fat diet (HFD) or HFD combined with EC, and metabolic changes were observed EC suppressed the expression of many inflammatory genes in the adipocytes co-cultured with endotoxin-stimulated macrophages. Specifically, EC markedly suppressed chemokine (CC motif) ligand 19 (CCL19) expression. The target cell of EC appeared to macrophages. The in vivo study indicated that mice fed the EC-supplemented HFD were protected from diet-induced obesity and insulin resistance. Accordingly, the expression levels of genes associated with inflammation in adipose tissue and in the liver were downregulated in this group of mice. CONCLUSIONS EC exerts beneficial effects for the prevention of adipose tissue inflammation and insulin resistance. Since we previously reported that mice deficient in the CCL19 receptor were protected from diet-induced obesity and insulin resistance, it can be concluded that the beneficial effects of EC could be mediated, at least in part, by marked suppression of CCL19 expression.
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Affiliation(s)
- T Sano
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - S Nagayasu
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Suzuki
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - M Iwashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Yamashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Shinjo
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Sanui
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Kushiyama
- Division of Metabolic Diseases, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
| | - T Kanematsu
- Department of Cellular and Molecular Pharmacology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - T Asano
- Department of Biological Chemistry, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - F Nishimura
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan.
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Arai R, Takahashi D, Inoue M, Irie T, Asano T, Konno T, Terkawi MA, Onodera T, Kondo E, Iwasaki N. Efficacy of teriparatide in the treatment of nontraumatic osteonecrosis of the femoral head: a retrospective comparative study with alendronate. BMC Musculoskelet Disord 2017; 18:24. [PMID: 28103867 PMCID: PMC5244698 DOI: 10.1186/s12891-016-1379-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 12/22/2016] [Indexed: 12/15/2022] Open
Abstract
Background Collapse of the femoral head associated with nontraumatic osteonecrosis (NOFH) is one of the most common causes of disability in young adult patients. Excessive bone resorption by osteoclast coincident with the suppression of osteogenesis are believed to be responsible for collapse progression. Alendronate that inhibits bone resorption by inducing osteoclast apoptosis has been traditionally used for treating NOFH; however, several reports documented serious complications by the use of this drug. On the other hand, teriparatide activates osteoblasts leading to an overall increase in bone volume, and is expected to reduce the progression of femoral head collapse in NOFH. Therefore, the present study was undertaken to examine pharmacological effects of teriparatide on collapse progression of NOFH and to compare these effects with alendronate. Methods We conducted a retrospective study in our facility for comparing the pharmacological effects of teriparatide and alendronate on 32 NOFH patients diagnosed with osteoporosis. Between 2007 and 2013, patients were treated with daily administration of 20 μg teriparatide (15 patients: 18 hips), or with 35 mg of alendronate once a week (17 patients: 22 hips). The mean period of follow-up was 18.7 months. The progression of collapse was evaluated prior to the administration and later every three months by anteroposterior radiographs. Collapse progression with > 1 mm was defined as advanced collapse, while with < 1 mm was defined as stable radiologic disease. Student’s t-test and the chi-square test was used to do compare the pharmacological effects of the two groups. Results Treatment with terparatide had a tendency to reduce the rate of advanced collapse as compared to that with alendronate (p = 0.105). Kaplan-Meier curves related to stable radiologic disease showed that teriparatide-treated patients had better stable states than these treated with alendronate (p = 0.08, log-rank test). Moreover, treatment with teriparatide resulted in a significant reduction in collapse progression as compared to that with alendronate, noted at the end of follow-up period (p = 0.049). Conclusion The present study suggests that teriparatide has greater pharmacological effects than alendronate for treating NOFH and preventing the collapse of femoral head. Trial registration The registration number in UMIN Clinical Trial Registry is UMIN000017582. The date of registration is May 5, 2015.
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Affiliation(s)
- Ryuta Arai
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan.
| | - Daisuke Takahashi
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Masahiro Inoue
- Department of Orthopaedic Surgery, Wajo Eniwa Hospital, Koganechuo 2-1-1, Eniwa, 061-1149, Japan
| | - Tohru Irie
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tsuyoshi Asano
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Takuya Konno
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Mohamad Alaa Terkawi
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Tomohiro Onodera
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Eiji Kondo
- Department of Advanced Therapeutic Research for Sports Medicine, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15, Nish-7, Kita-ku, Sapporo, 060-8638, Japan
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Shitara K, Kuwabara A, Fisher CAJ, Ogawa T, Asano T, Kaneko Y, Omote A, Moriwake H. Effect of oxygen vacancy segregation in Au or Pt/oxide hetero-interfaces on electronic structures. RSC Adv 2017. [DOI: 10.1039/c7ra04804a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We investigated the effects of oxygen vacancy segregation on electronic structures in the vicinity of hetero-interfaces between noble metals (Au and Pt) and yttria stabilized zirconia by performing first-principles calculations and Bader analysis.
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Affiliation(s)
- K. Shitara
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
- Research and Services Division of Materials Data and Integrated System
| | - A. Kuwabara
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
- Research and Services Division of Materials Data and Integrated System
| | - C. A. J. Fisher
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
| | - T. Ogawa
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
| | - T. Asano
- Advanced Research Division
- Panasonic Corporation
- Kyoto
- Japan
| | - Y. Kaneko
- Advanced Research Division
- Panasonic Corporation
- Kyoto
- Japan
| | - A. Omote
- Advanced Research Division
- Panasonic Corporation
- Kyoto
- Japan
| | - H. Moriwake
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
- Research and Services Division of Materials Data and Integrated System
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Sato A, Asano T, Isono M, Okubo K, Asano T. Ritonavir interacts with ixazomib synergistically to cause ubiquitinated protein accumulation and endoplasmic reticulum stress in bladder cancer cells. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61435-1] [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: 11/17/2022]
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Nakaseko K, Asano T. AB0784 A Study of Serum Electrolyte Levels after Denosumab Administration. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sato S, Asano T, Kobayashi H, Watanabe H, Ohira H. AB0572 Impact of Aging on The Clinical Features and Treatment of Anca Associated Vasculitis in The Elderly. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3815] [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: 11/04/2022]
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Inokuchi J, Kuroiwa K, Naito S, Kakehi Y, Sugimoto M, Tanikawa T, Fujimoto H, Gotoh M, Masumori N, Ogawa O, Etoh M, Ohyama C, Yamaguchi A, Matsuyama H, Ichikawa T, Asano T, Takenaka A, Fujimoto K, Yamaguchi R, Habuchi T, Hashine K, Arai Y, Nagaoka A, Nishiyama H, Shinohara N, Niwakawa M, Egawa S, Ozono S, Kawano Y, Ishizuka O, Nishimura K, Tochigi T, Sugimura Y, Mizusawa J, Eba J. 801 The impact of ureteral ligation on clinical outcome during radical nephroureterectomy for upper urinary tract urothelial carcinoma: Multi-institutional case series study JCOG1110A. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1569-9056(16)60803-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Saito M, Osaka I, Suzuki Y, Takimiya K, Okabe T, Ikeda S, Asano T. Highly Efficient and Stable Solar Cells Based on Thiazolothiazole and Naphthobisthiadiazole Copolymers. Sci Rep 2015; 5:14202. [PMID: 26395221 PMCID: PMC4585800 DOI: 10.1038/srep14202] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 08/21/2015] [Indexed: 12/03/2022] Open
Abstract
A critical issue in polymer-based solar cells (PSCs) is to improve the power conversion efficiency (PCE) as well as the stability. Here, we describe the development of new semiconducting polymers consisting of thiophene, thiazolothiazole and naphthobisthiadiazole in the polymer backbone. The polymers had good solubility and thus solution-processability, appropriate electronic structure with narrow band gaps of ~1.57 eV and low-lying HOMO energy levels of ~-5.40 eV, and highly ordered structure with the favorable face-on backbone orientation. Solar cells based on the polymers and PC71BM exhibited quite high PCEs of up to 9%. More interestingly, the cells also demonstrated excellent stability as they showed negligible degradation of PCE when stored at 85˚C for 500 hours in the dark under nitrogen atmosphere. These results indicate that the newly developed polymers are promising materials for PSCs in the practical use.
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Affiliation(s)
- Masahiko Saito
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
- Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science, Wako, Saitama 351-0198, Japan
| | - Itaru Osaka
- Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science, Wako, Saitama 351-0198, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Chiyoda-ku 102-0075 Japan
| | - Yasuhito Suzuki
- Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science, Wako, Saitama 351-0198, Japan
| | - Kazuo Takimiya
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
- Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science, Wako, Saitama 351-0198, Japan
| | - Takashi Okabe
- Central Technical Research Laboratory, JX Nippon Oil & Energy Corporation, 8, Chidoricho, Naka-ku, Yokohama 231-0815, Japan
| | - Satoru Ikeda
- Central Technical Research Laboratory, JX Nippon Oil & Energy Corporation, 8, Chidoricho, Naka-ku, Yokohama 231-0815, Japan
| | - Tsuyoshi Asano
- Central Technical Research Laboratory, JX Nippon Oil & Energy Corporation, 8, Chidoricho, Naka-ku, Yokohama 231-0815, Japan
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Ito T, Kenmochi T, Nishikawa T, Maruyama M, Kusaka M, Sasaki H, Asano T, Matsubara H, Hoshinaga K. A novel screening test for detecting graft thrombosis after pancreatic transplantation using contrast-enhanced ultrasonography with sonazoid. Transplant Proc 2015; 46:1917-9. [PMID: 25131070 DOI: 10.1016/j.transproceed.2014.05.071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Pancreatic graft thrombosis is the primary cause of nonimmunologic graft loss, with an incidence ranging from 5% to 15%. Therefore, developing a screening test to detect graft thrombosis after pancreatic transplantation is important. We created a screening test to assess graft thrombosis after pancreatic transplantation using contrast-enhanced ultrasonography (CEUS) with Sonazoid in addition to Doppler ultrasonography. A total of seven patients were examined using CEUS after undergoing pancreatic transplantation. All patients were observed to have a clear blood flow from the horizontal region to the peripheral region of the splenic vein in the pancreatic graft, and only one of the seven patients exhibited a blood flow in the horizontal portion of the splenic vein on Doppler ultrasonography performed immediately after pancreatic transplantation. Results from CEUS with Sonazoid showed the blood flow in the splenic vein and parenchyma of the pancreatic graft in detail, despite the slow and lateral blood flow in the splenic vein of the pancreatic graft immediately after transplantation.
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Affiliation(s)
- T Ito
- Department of Organ Transplant Surgery, Fujita Health University, School of Medicine, Aichi, Japan.
| | - T Kenmochi
- Department of Organ Transplant Surgery, Fujita Health University, School of Medicine, Aichi, Japan
| | - T Nishikawa
- Division of Liver Biliary Tract and Pancreas Disease, Fujita Health University, School of Medicine, Aichi, Japan
| | - M Maruyama
- Department of Surgery, National Hospital Organization, Chiba East Hospital, Chiba, Japan
| | - M Kusaka
- Department of Urology, Fujita Health University, School of Medicine, Aichi, Japan
| | - H Sasaki
- Department of Urology, Fujita Health University, School of Medicine, Aichi, Japan
| | - T Asano
- Department of Surgery, National Hospital Organization, Chiba East Hospital, Chiba, Japan
| | - H Matsubara
- Department of Frontier Surgery, Chiba University, Graduate School of Medicine, Chiba, Japan
| | - K Hoshinaga
- Department of Urology, Fujita Health University, School of Medicine, Aichi, Japan
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Saigo K, Otsuki K, Hasegawa M, Maruyama M, Akutsu N, Aoyama H, Matsumoto I, Noguchi H, Asano T, Kitamura H. 329. The impact of gemcitabine plus S-1 combination therapy in patients with highly advanced or recurrent pancreatic and biliary tract cancers. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.319] [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] Open
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Kuroda K, Asakuma J, Asano T, Horiguchi A, Isono M, Tsujita Y, Sato A, Seguchi K, Ito K, Asano T. Clinical significance of p21-activated kinase 1 expression level in patients with upper urinary tract urothelial carcinoma. Jpn J Clin Oncol 2014; 45:103-10. [DOI: 10.1093/jjco/hyu163] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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