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Tamagawa S, Sakai D, Nojiri H, Nakamura Y, Warita T, Matsushita E, Schol J, Soma H, Ogasawara S, Munesada D, Koike M, Shimizu T, Sato M, Ishijima M, Watanabe M. SOD2 orchestrates redox homeostasis in intervertebral discs: A novel insight into oxidative stress-mediated degeneration and therapeutic potential. Redox Biol 2024; 71:103091. [PMID: 38412803 PMCID: PMC10907854 DOI: 10.1016/j.redox.2024.103091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 02/14/2024] [Indexed: 02/29/2024] Open
Abstract
Low back pain (LBP) is a pervasive global health concern, primarily associated with intervertebral disc (IVD) degeneration. Although oxidative stress has been shown to contribute to IVD degeneration, the underlying mechanisms remain undetermined. This study aimed to unravel the role of superoxide dismutase 2 (SOD2) in IVD pathogenesis and target oxidative stress to limit IVD degeneration. SOD2 demonstrated a dynamic regulation in surgically excised human IVD tissues, with initial upregulation in moderate degeneration and downregulation in severely degenerated IVDs. Through a comprehensive set of in vitro and in vivo experiments, we found a suggestive association between excessive mitochondrial superoxide, cellular senescence, and matrix degradation in human and mouse IVD cells. We confirmed that aging and mechanical stress, established triggers for IVD degeneration, escalated mitochondrial superoxide levels in mouse models. Critically, chondrocyte-specific Sod2 deficiency accelerated age-related and mechanical stress-induced disc degeneration in mice, and could be attenuated by β-nicotinamide mononucleotide treatment. These revelations underscore the central role of SOD2 in IVD redox balance and unveil potential therapeutic avenues, making SOD2 and mitochondrial superoxide promising targets for effective LBP interventions.
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Affiliation(s)
- Shota Tamagawa
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan; Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan.
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoshihiko Nakamura
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Takayuki Warita
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Erika Matsushita
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Jordy Schol
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Hazuki Soma
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Shota Ogasawara
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Daiki Munesada
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Masato Koike
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takahiko Shimizu
- Aging Stress Response Research Project Team, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Masato Sato
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Masahiko Watanabe
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Japan
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Takahashi R, Nojiri H, Ohara Y, Fujiwara T, Ishijima M. Decreased grip strength is associated with paraspinal muscular oxidative stress in female lumbar degenerative disease patients. J Orthop Res 2024. [PMID: 38650087 DOI: 10.1002/jor.25863] [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: 04/30/2023] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/25/2024]
Abstract
We aimed to investigate the relationship between superoxide dismutase 2-related oxidative stress in the paraspinal muscles and spinal alignment, clinical skeletal muscle parameters, and mitochondrial function. Multifidus muscle samples from patients who underwent posterior lumbar surgery were analyzed. Patients with diseases affecting oxidative stress and spinal alignment were excluded. The superoxide dismutase 2 redox index was defined as the ratio of reactive oxygen species (superoxide) to antioxidant enzymes (superoxide dismutase 2) and was used as an index of oxidative stress. Patients were divided into two groups based on the superoxide dismutase 2 redox index. Spinal alignment, clinical skeletal muscle parameters, and succinic dehydrogenase (SDH) mean grayscale value were compared between the groups, with analyzes for both sexes. Multiple regression analyzes were used to adjust for the confounding effect of age on variables showing a significant difference between the two groups. Thirty-five patients with lumbar degenerative diseases were included. No significant differences were observed between the two groups for any of the parameters in males; however, females with a higher superoxide dismutase 2 redox index had greater lumbar lordosis, lower grip strength, and higher SDH mean grayscale value than those with a lower index. Multiple regression analyzes revealed that the superoxide dismutase 2 redox index was an independent explanatory variable for lumbar lordosis, grip strength, and SDH mean grayscale value in female patients. In conclusion, superoxide dismutase 2-related oxidative stress in the paraspinal muscles was associated with mitochondrial dysfunction and decreased grip strength in female lumbar degenerative disease patients.
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Affiliation(s)
- Ryosuke Takahashi
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
| | - Yukoh Ohara
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
- Department of Neurosurgery, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshiyuki Fujiwara
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
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Miyagami T, Nojiri H, Okada S, Mitsumoto K, Uemura K, Naito T. Atypical presentation of tight filum terminale with thoracic disc herniation: a case report. J Med Case Rep 2024; 18:69. [PMID: 38310287 PMCID: PMC10838460 DOI: 10.1186/s13256-024-04371-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/06/2024] [Indexed: 02/05/2024] Open
Abstract
BACKGROUND Tight filum terminale is a rare and challenging condition to diagnose because it presents with nonspecific symptoms and unclear imaging findings. This report documents an atypical case of tight filum terminale. CASE PRESENTATION The patient was a previously healthy Asian 18-year-old male presenting with recurrent upper extremity and back pain, initially treated as nonspecific musculoskeletal pain. Notably, the patient's symptoms were inconsistent with the dermatome, showing no correlation with his skin's sensory innervation areas. In contrast to typical tight filum terminale presentations focused on lower extremity and lumbar region disturbances, this patient experienced pain and weakness predominantly in the upper extremities and back, hypothesized to result from traction myelopathy exacerbated by thoracic disc herniation. Investigations including blood and nerve function tests were inconclusive. However, a magnetic resonance imaging scan revealed a combination of tight filum terminale and tiny thoracic disc herniation. A diagnosis of tethered spinal cord syndrome was confirmed following further tests and imaging. The filum terminale was surgically removed, resolving the symptoms at a 7-month follow-up. CONCLUSIONS This case underlines the importance of including tight filum terminale as a differential diagnosis in cases of unexplained upper or lower extremity pain. Primary care practitioners, particularly those managing undefined symptoms, should consider tight filum terminale in their diagnostic approach.
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Affiliation(s)
- Taiju Miyagami
- Department of General Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan.
| | - Hidetoshi Nojiri
- Departments of Orthopaedics, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Satoru Okada
- Department of Family & General Medicine, Tokyo-Kita Medical Center, Tokyo, Japan
| | - Kiichi Mitsumoto
- Department of Family & General Medicine, Tokyo-Kita Medical Center, Tokyo, Japan
| | - Kosuke Uemura
- Department of General Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Toshio Naito
- Department of General Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
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Tanaka M, Kanayama M, Oha F, Shimamura Y, Tsujimoto T, Hasegawa Y, Hashimoto T, Nojiri H, Ishijima M. Potential of whole-body dual-energy X-ray absorptiometry to predict muscle size of psoas major, gluteus maximus and back muscles. BMC Musculoskelet Disord 2023; 24:917. [PMID: 38012671 PMCID: PMC10680309 DOI: 10.1186/s12891-023-07051-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 11/21/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND Measurement of trunk muscle cross-sectional area (CSA) using axial magnetic resonance imaging (MRI) is considered clinically meaningful for understanding several spinal pathologies, such as low back pain and spinal sagittal imbalance. However, it remains unclear whether trunk muscle mass (TMM) measured using dual-energy X-ray absorptiometry (DXA) can predict the trunk muscle CSA. The aim of this study is to determine if DXA-derived TMM is associated and predicts with CSA of paraspinal muscles and gluteus maximus measured using MRI in healthy volunteers. METHODS A total of 48 healthy volunteers underwent whole-body DXA and MRI of the spinopelvic region. The CSA of the psoas major, back muscles, and gluteus maximus were measured on axial MRI. Correlations and linear regressions between the TMM measured using DXA and the CSA of each musculature were investigated. RESULTS There was a weak correlation between TMM and CSA of the psoas major in men (r = 0.39, P = 0.0678), and the linear regression was y = 301.74x - 401.24 (R2 = 0.2976, P = 0.0070). A moderate correlation was found in women (r = 0.58, P = 0.0021), and the linear regression was y = 230.21x - 695.29 (R2 = 0.4445, P = 0.0003). Moderate correlations were observed between TMM and CSA of the back muscles in both men (r = 0.63, P = 0.0012) and women (r = 0.63, P = 0.0007), the linear regression was y = 468.52x + 3688.5 (R2 = 0.5505, P < 0.0001) in men and y = 477.39x + 2364.1 (R2 = 0.564, P < 0.0001) in women. There was a strong correlation between TMM and CSA of the gluteus maximus in men (r = 0.72, P < 0.0001), and the linear regression was y = 252.69x - 880.5 (R2 = 0.6906, P < 0.0001). A moderate correlation was found in women (r = 0.69, P < 0.0001), and the linear regression was y = 230.74x - 231.32 (R2 = 0.6542, P < 0.0001). CONCLUSIONS The DXA-derived TMM was able to predict the CSA of the psoas major, back muscles, and gluteus maximus, and significantly correlated with the CSA of the back muscles and gluteus maximus. It might be a safer and cheaper alternative for evaluating the size of the back muscles and gluteus maximus.
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Affiliation(s)
- Masaru Tanaka
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan.
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 1-5-29-4F, Yushima, Bunkyo-ku, Tokyo, 113-0034, Japan.
| | - Masahiro Kanayama
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Fumihiro Oha
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Yukitoshi Shimamura
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Takeru Tsujimoto
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Yuichi Hasegawa
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Tomoyuki Hashimoto
- Spine Center, Hakodate Central General Hospital, Hon-cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 1-5-29-4F, Yushima, Bunkyo-ku, Tokyo, 113-0034, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 1-5-29-4F, Yushima, Bunkyo-ku, Tokyo, 113-0034, Japan
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Tanaka M, Kanayama M, Hashimoto T, Oha F, Shimamura Y, Tsujimoto T, Hasegawa Y, Endo T, Nojiri H, Ishijima M. Characteristics of older patients with postmenopausal osteoporosis who developed loss of muscle mass during the COVID-19 pandemic - a case-control study. BMC Musculoskelet Disord 2023; 24:626. [PMID: 37533001 PMCID: PMC10394852 DOI: 10.1186/s12891-023-06755-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 07/25/2023] [Indexed: 08/04/2023] Open
Abstract
BACKGROUND Under the restriction of social activities during the coronavirus disease 2019 (COVID-19) pandemic, there was concern about the loss of muscle mass due to a decrease in physical activity for the elderly. The purpose of this study was to investigate the characteristics of older patients with postmenopausal osteoporosis who developed loss of muscle mass during the COVID-19 pandemic in Japan. METHODS A total of 54 patients with postmenopausal osteoporosis were evaluated in this study. Whole-body dual-energy X-ray absorptiometry was performed pre- and post-COVID-19 pandemic to measure trunk and lower limb muscle mass. At the time of the post-COVID-19 pandemic, we conducted a survey to compare lifestyle before pandemic (the frequency of going out, the frequency of meeting acquaintances or families living apart, regular exercise habits, walking time, family structure), and comorbidities between the muscle mass loss (ML) group and the muscle mass maintenance (MM) group. The ML group consisted of patients with at least a 5% decrease in lower limb muscle mass or trunk muscle mass. RESULTS A significant difference was found only for the family structure (P = 0.0279); in the ML group, those living alone were the largest group, while in the MM group they were the smallest group. CONCLUSIONS The ML group was significantly more likely to live alone than the MM group. The current study showed that loss of muscle mass was more common in patients living alone.
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Affiliation(s)
- Masaru Tanaka
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan.
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 1-5-29-4F Yushima, Bunkyo-Ku, Tokyo, 113-0034, Japan.
| | - Masahiro Kanayama
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Tomoyuki Hashimoto
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Fumihiro Oha
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Yukitoshi Shimamura
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Takeru Tsujimoto
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Yuichi Hasegawa
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Tsutomu Endo
- Spine Center, Hakodate Central General Hospital, Hon-Cho 33-2, Hakodate, Hokkaido, 040-8585, Japan
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 1-5-29-4F Yushima, Bunkyo-Ku, Tokyo, 113-0034, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 1-5-29-4F Yushima, Bunkyo-Ku, Tokyo, 113-0034, Japan
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Nojiri H, Okuda T, Takano H, Gomi M, Takahashi R, Shimura A, Tamagawa S, Hara T, Ohara Y, Ishijima M. Elimination of Lumbar Plexus Injury by Changing the Entry Point and Traction Direction of the Psoas Major Muscle in Transpsoas Lateral Lumbar Spine Surgery. Medicina (Kaunas) 2023; 59:medicina59040730. [PMID: 37109688 PMCID: PMC10145782 DOI: 10.3390/medicina59040730] [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] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/13/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023]
Abstract
Background and Objectives: The lateral approach is commonly used for anterior column reconstruction, indirect decompression, and fusion in patients with lumbar degenerative diseases and spinal deformities. However, intraoperative lumbar plexus injury may occur. This is a retrospective comparative study to investigate and compare neurological complications between the conventional lateral approach and a modified lateral approach at L4/5. Materials and Methods: Patients with a lumbar degenerative disease requiring single-level intervertebral fusion at L4/5 were included and categorized into group X and group A. Patients in group X underwent conventional extreme lateral interbody fusion, while those in group A underwent a modified surgical procedure that included splitting of the anterior third of the psoas muscle, which was dilated by the retractor on the anterior third of the intervertebral disc. The incidence of lumbar plexus injury, defined as a decrease of ≥1 grade on manual muscle testing of hip flexors and knee extensors and sensory impairment of the thigh for ≥3 weeks, on the approach side, was investigated. Results: Each group comprised 50 patients. No significant between-group differences in age, sex, body mass index, and approach side were observed. There was a significant between-group difference in intraoperative neuromonitoring stimulation value (13.1 ± 5.4 mA in group X vs. 18.5 ± 2.3 mA in group A, p < 0.001). The incidence of neurological complications was significantly higher in group X than in group A (10.0% vs. 0.0%, respectively, p < 0.05). Conclusions: In our modified procedure, the anterior third of the psoas muscle was entered and split, and the intervertebral disc could be reached without damaging the lumbar plexus. When performing lumbar surgery using the lateral approach, lumbar plexus injury can be avoided by following surgical indication criteria based on the location of the lumbar plexus with respect to the psoas muscle and changing the transpsoas approach to the intervertebral disc.
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Affiliation(s)
- Hidetoshi Nojiri
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Takatoshi Okuda
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Hiromitsu Takano
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Motoshi Gomi
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Ryosuke Takahashi
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Arihisa Shimura
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Shota Tamagawa
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Takeshi Hara
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
- Department of Neurosurgery, Juntendo University, Tokyo 113-8421, Japan
| | - Yukoh Ohara
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo 113-8421, Japan
- Department of Neurosurgery, Juntendo University, Tokyo 113-8421, Japan
| | - Muneaki Ishijima
- Department of Orthopedic Surgery, Juntendo University, Tokyo 113-8421, Japan
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Tamagawa S, Sakai D, Schol J, Sako K, Nakamura Y, Matsushita E, Warita T, Hazuki S, Nojiri H, Sato M, Ishijima M, Watanabe M. N-acetylcysteine attenuates oxidative stress-mediated cell viability loss induced by dimethyl sulfoxide in cryopreservation of human nucleus pulposus cells: A potential solution for mass production. JOR Spine 2022; 5:e1223. [PMID: 36601378 PMCID: PMC9799083 DOI: 10.1002/jsp2.1223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/13/2022] [Accepted: 08/16/2022] [Indexed: 11/06/2022] Open
Abstract
Background Cell therapy is considered a promising strategy for intervertebral disc (IVD) regeneration. However, cell products often require long-term cryopreservation, which compromises cell viability and potency, thus potentially hindering commercialization and off-the-shelf availability. Dimethyl sulfoxide (DMSO) is a commonly used cryoprotectant, however, DMSO is associated with cytotoxicity and cell viability loss. This study aimed to investigate the effects of DMSO on human nucleus pulposus cells (NPC) and the role of oxidative stress in DMSO-induced cytotoxicity. Furthermore, we examined the potential of antioxidant N-acetylcysteine (NAC) supplementation to mitigate the negative effects of DMSO. Methods NPC were exposed to various concentrations of DMSO with or without a freezing cycle. Cell viability, cell apoptosis and necrosis rates, intracellular reactive oxygen species (ROS) levels, and gene expression of major antioxidant enzymes were evaluated. In addition, NAC was added to cryopreservation medium containing 10% DMSO and its effects on ROS levels and cell viability were assessed. Results DMSO concentrations ≤1% for 24 h did not significantly affect the NPC viability, whereas exposure to 5 and 10% DMSO (most commonly used concentration) caused cell viability loss (loss of 57% and 68% respectively after 24 h) and cell death in a dose- and time-dependent manner. DMSO increased intracellular and mitochondrial ROS (1.9-fold and 3.6-fold respectively after 12 h exposure to 10% DMSO) and downregulated gene expression levels of antioxidant enzymes in a dose-dependent manner. Tempering ROS through NAC treatment significantly attenuated DMSO-induced oxidative stress and supported maintenance of cell viability. Conclusions This study demonstrated dose- and time-dependent cytotoxic effects of DMSO on human NPC. The addition of NAC to the cryopreservation medium ameliorated cell viability loss by reducing DMSO-induced oxidative stress in the freeze-thawing cycle. These findings may be useful for future clinical applications of whole cells and cellular products.
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Affiliation(s)
- Shota Tamagawa
- Department of Medicine for Orthopaedics and Motor OrganJuntendo University Graduate School of MedicineTokyoJapan,Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
| | - Jordy Schol
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
| | - Kosuke Sako
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
| | - Yoshihiko Nakamura
- Research Center for Regenerative MedicineTokai University School of MedicineIseharaJapan
| | - Erika Matsushita
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
| | - Takayuki Warita
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan,TUNZ Pharma Co., Ltd.OsakaJapan
| | - Soma Hazuki
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan,TUNZ Pharma Co., Ltd.OsakaJapan
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor OrganJuntendo University Graduate School of MedicineTokyoJapan
| | - Masato Sato
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor OrganJuntendo University Graduate School of MedicineTokyoJapan
| | - Masahiko Watanabe
- Department of Orthopaedic Surgery, Surgical ScienceTokai University School of MedicineIseharaJapan
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Sato T, Nojiri H, Okuda T, Miyagawa K, Kobayashi N, Takahashi R, Shimura A, Tamagawa S, Ohara Y, Hara T, Ishijima M. Three-dimensional morphological analysis of the thoracic pedicle and related radiographic factors in adolescent idiopathic scoliosis. BMC Musculoskelet Disord 2022; 23:847. [PMID: 36068555 PMCID: PMC9450434 DOI: 10.1186/s12891-022-05799-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/02/2022] [Indexed: 11/10/2022] Open
Abstract
Background This study aimed to investigate the laterality of the pedicle morphology at the apical vertebra (AV) level and identify the radiographic factors associated with the laterality ratio of the pedicle morphology at the AV level in patients with adolescent idiopathic scoliosis (AIS). Methods Overall, 684 pedicles in 57 AIS patients aged 10–20 years, who underwent preoperative computed tomography (CT) and had Lenke type 1 or 2 with right convex main thoracic curves (MTC), were evaluated. Pedicle diameters of the MTC were assessed. We defined and compared the region containing two vertebrae adjacent to the AV (APEX±1) and the region containing two vertebrae adjacent to the neutral vertebra. We analyzed the pedicle diameter and laterality ratio of APEX±1 and performed multiple linear regression analysis to identify the radiographic factors associated with the laterality of the pedicle diameter. Results On the concave side of APEX±1, the pedicles of 15 patients (26.3%) did not accept a 4-mm-diameter pedicle screw (PS), even with 25% cortical bone width expansion. Laterality ratio differences in the pedicle diameters of the cortical bone width in APEX±1 were large in patients with more proximal AV level (p < 0.001) and smaller apical vertebral rotation (AVR) (p = 0.029). Conclusions Preoperative planning to accurately select and insert the PS in AIS should be based on the anatomical limitations in APEX±1, AV level, and AVR degree. In APEX±1, the correlation between AVR and the laterality ratio of the pedicle diameter may be useful for pathoetiological interpretation of the AIS deformity. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-022-05799-4.
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Affiliation(s)
- Tatsuya Sato
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan.
| | - Takatoshi Okuda
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Kei Miyagawa
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Nozomu Kobayashi
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Ryosuke Takahashi
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Arihisa Shimura
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Shota Tamagawa
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
| | - Yukoh Ohara
- Department of Neurosurgery, Juntendo University, Tokyo, Japan
| | - Takeshi Hara
- Department of Neurosurgery, Juntendo University, Tokyo, Japan
| | - Muneaki Ishijima
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo, Japan
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9
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Haberl B, Quirinale DG, Li CW, Granroth GE, Nojiri H, Donnelly ME, Ushakov SV, Boehler R, Winn BL. Multi-extreme conditions at the Second Target Station. Rev Sci Instrum 2022; 93:083907. [PMID: 36050043 DOI: 10.1063/5.0093065] [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: 03/25/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Three concepts for the application of multi-extreme conditions under in situ neutron scattering are described here. The first concept is a neutron diamond anvil cell made from a non-magnetic alloy. It is shrunk in size to fit existing magnets and future magnet designs and is designed for best pressure stability upon cooling. This will allow for maximum pressures above 10 GPa to be applied simultaneously with (steady-state) high magnetic field and (ultra-)low temperature. Additionally, an implementation of miniature coils for neutron diamond cells is presented for pulsed-field applications. The second concept presents a set-up for laser-heating a neutron diamond cell using a defocused CO2 laser. Cell, anvil, and gasket stability will be achieved through stroboscopic measurements and maximum temperatures of 1500 K are anticipated at pressures to the megabar. The third concept presents a hybrid levitator to enable measurements of solids and liquids at temperatures in excess of 4000 K. This will be accomplished by a combination of bulk induction and surface laser heating and hyperbaric conditions to reduce evaporation rates. The potential for deployment of these multi-extreme environments within this first instrument suite of the Second Target Station is described with a special focus on VERDI, PIONEER, CENTAUR, and CHESS. Furthermore, considerations for deployment on future instruments, such as the one proposed as TITAN, are discussed. Overall, the development of these multi-extremes at the Second Target Station, but also beyond, will be highly advantageous for future experimentation and will give access to parameter space previously not possible for neutron scattering.
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Affiliation(s)
- B Haberl
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - D G Quirinale
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - C W Li
- Materials Science and Engineering/Mechanical Engineering, University of California, Riverside, California 92521, USA
| | - G E Granroth
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - H Nojiri
- Insitute for Materials Research Tohoku University, Sendai, Japan
| | - M-E Donnelly
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - S V Ushakov
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85281, USA
| | - R Boehler
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - B L Winn
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
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10
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Koike M, Nagao M, Iwase Y, Kaneko K, Ishijima M, Nojiri H. Clinical Efficacy of Melon GliSODin ® for the Treatment of Aging-Related Dysfunction in Motor Organs-A Double Blind, Randomized Placebo-Controlled Study. J Clin Med 2022; 11:2747. [PMID: 35628874 PMCID: PMC9143343 DOI: 10.3390/jcm11102747] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/29/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Locomotive syndrome is a concept proposed in Japan involving decreased mobility due to osteoarthritis, osteoporosis, and sarcopenia. This double-blind, randomized study aimed to investigate the effects of superoxide dismutase (SOD)-rich melon extract (Melon GliSODin®) on locomotive syndrome. METHODS For 6 months, we administered oral Melon GliSODin® (500.4 mg/day) or a placebo to 24 and 22 women, respectively (aged 50-80 years), with knee or lower back discomfort or pain. Using baseline and 6-month data, changes in the Verbal Rating Scale and in subjective symptoms (determined using the Japanese Knee Osteoarthritis Measure, Locomo 25, the Roland-Morris Disability questionnaire, and the Chalder Fatigue Scale) were assessed, along with various oxidative markers, antioxidants, inflammatory markers, renal and liver function biochemical markers, bone metabolism markers, body composition, and motor function. RESULTS Oral Melon GliSODin® administration tended to be associated with a larger improvement in subjective symptom scores, a reduction in oxidative markers (malondialdehyde and diacron reactive oxygen metabolites) and tumor necrosis factor-α, and a significant increase in non-fat mass between baseline and 6 months. However, no statistically significant differences were observed between the groups for outcomes at 6 months. CONCLUSIONS Melon GliSODin® tended to improve the subjective symptoms of participants who had knee or lower back pain or discomfort. Melon GliSODin® administration may help to prevent the progression of locomotive syndrome. Future studies involving larger sample sizes and more stringent randomization protocols are needed to determine differences between the placebo and Melon GliSODin® groups.
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Affiliation(s)
- Masato Koike
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo 136-0075, Japan; (M.K.); (Y.I.)
| | - Masashi Nagao
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; (M.N.); (K.K.); (M.I.)
- Department of Orthopaedic Surgery, Medical Technology Innovation Center, Clinical Research & Trial Center, Graduate School of Health and Sports Science, Juntendo University, Tokyo 113-8421, Japan
| | - Yoshiyuki Iwase
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo 136-0075, Japan; (M.K.); (Y.I.)
| | - Kazuo Kaneko
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; (M.N.); (K.K.); (M.I.)
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; (M.N.); (K.K.); (M.I.)
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo 136-0075, Japan; (M.K.); (Y.I.)
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; (M.N.); (K.K.); (M.I.)
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11
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Tamagawa S, Okuda T, Nojiri H, Sato T, Momomura R, Ohara Y, Hara T, Ishijima M. Anatomy of the L5 nerve root in the pelvis for safe sacral screw placement: a cadaveric study. J Neurosurg Spine 2022; 36:809-814. [PMID: 34798616 DOI: 10.3171/2021.8.spine21962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 08/09/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Previous reports have focused on the complications of L5 nerve root injury caused by anterolateral misplacement of the S1 pedicle screws. Anatomical knowledge of the L5 nerve root in the pelvis is essential for safe and effective placement of the sacral screw. This cadaveric study aimed to investigate the course of the L5 nerve root in the pelvis and to clarify a safe zone for inserting the sacral screw. METHODS Fifty-four L5 nerve roots located bilaterally in 27 formalin-fixed cadavers were studied. The ventral rami of the L5 nerve roots were dissected along their courses from the intervertebral foramina to the lesser pelvis. The running angles of the L5 nerve roots from the centerline were measured in the coronal plane. In addition, the distances from the ala of the sacrum to the L5 nerve roots were measured in the sagittal plane. RESULTS The authors found that the running angles of the L5 nerve roots changed at the most anterior surface of the ala of the sacrum. The angles of the bilateral L5 nerve roots from the right and left L5 intervertebral foramina to their inflection points were 13.77° ± 5.01° and 14.65° ± 4.71°, respectively. The angles of the bilateral L5 nerve roots from the right and left inflection points to the lesser pelvis were 19.66° ± 6.40° and 20.58° ± 5.78°, respectively. There were no significant differences between the angles measured in the right and left nerve roots. The majority of the L5 nerves coursed outward after changing their angles at the inflection point. The distances from the ala of the sacrum to the L5 nerve roots in the sagittal plane were less than 1 mm in all cases, which indicated that the L5 nerve roots were positioned close to the ala of the sacrum and had poor mobility. CONCLUSIONS All of the L5 nerve roots coursed outward after exiting the intervertebral foramina and never inward. To prevent iatrogenic L5 nerve root injury, surgeons should insert the S1 pedicle screw medially with an angle > 0° toward the inside of the S1 anterior foramina and the sacral alar screw laterally with an angle > 30°.
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Affiliation(s)
- Shota Tamagawa
- 1Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo
| | - Takatoshi Okuda
- 1Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo
| | - Hidetoshi Nojiri
- 1Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo
| | - Tatsuya Sato
- 1Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo
| | - Rei Momomura
- 2Department of Orthopedic Surgery, Juntendo University Urayasu Hospital, Chiba; and
| | - Yukoh Ohara
- 3Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Takeshi Hara
- 3Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Muneaki Ishijima
- 1Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo
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12
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Uehara H, Itoigawa Y, Wada T, Morikawa D, Koga A, Nojiri H, Kawasaki T, Maruyama Y, Ishijima M. Relationship of superoxide dismutase to rotator cuff injury/tear in a rat model. J Orthop Res 2022; 40:1006-1015. [PMID: 34185341 DOI: 10.1002/jor.25141] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 05/04/2021] [Accepted: 06/25/2021] [Indexed: 02/04/2023]
Abstract
Rotator cuff degeneration is one of the several factors that lead to rotator cuff tears. Oxidative stress and superoxide dismutase have been reported to be related to rotator cuff degeneration; however, the precise mechanism still remains unclear. In this study, we investigated the relationship of oxidative stress and superoxide dismutase to the degeneration of the rotator cuff using rat models. Eighty-four rats were used to create a collagenase-induced rotator cuff injury model (injury model) and a rotator cuff tear model (tear model). The controls were administered saline and had only a deltoid incision, respectively. We evaluated degeneration morphology of the rotator cuff using a degeneration score; dihydroethidium fluorescence intensity, which detects oxidative stress; gene expression; and superoxide dismutase activity. The rotator cuffs in the injury and tear models significantly increased degeneration scores and dihydroethidium fluorescence intensity. On the other hand, gene expression of superoxide dismutase isoform, superoxide dismutase 1, and superoxide dismutase activity were significantly decreased in the injury model but showed no significant difference in the tear model. These findings suggested that superoxide dismutase might not be associated with rotator cuff degeneration after tear but may be involved in degenerative rotator cuff without tear. However, we found that rotator cuff degeneration involves oxidative stress both with and without tear. Based on these findings, it is presumed that different treatments may be appropriate, depending on the state of rotator cuff degeneration, because the mechanisms of the degeneration may be different.
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Affiliation(s)
- Hirohisa Uehara
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan.,Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoshiaki Itoigawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Tomoki Wada
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Daichi Morikawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Akihisa Koga
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takayuki Kawasaki
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuichiro Maruyama
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
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13
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Tanaka M, Kanayama M, Hashimoto T, Oha F, Shimamura Y, Tsujimoto T, Hasegawa Y, Nojiri H, Ishijima M. Trends of Spine Surgeries during the First COVID-19 Semi-Lockdown: Survey in a Non-Epidemic Region in Japan. Spine Surg Relat Res 2022; 6:109-114. [PMID: 35478977 PMCID: PMC8995125 DOI: 10.22603/ssrr.2021-0208] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 12/06/2021] [Indexed: 12/30/2022] Open
Abstract
Introduction Methods Results Conclusions
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Affiliation(s)
| | | | | | | | | | | | | | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine
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14
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Tamagawa S, Nojiri H, Okuda T, Miyagawa K, Sato T, Takahashi R, Shimura A, Ishijima M. Trans-Sacral Epiduroscopic Ho:YAG Laser Ablation of the Ligamentum Flavum in a Live Pig. Spine Surg Relat Res 2022; 6:167-174. [PMID: 35478976 PMCID: PMC8995116 DOI: 10.22603/ssrr.2021-0126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 08/14/2021] [Indexed: 11/11/2022] Open
Abstract
Introduction For the aging population, surgery for lumbar spinal canal stenosis (LSCS) requires minimally invasive procedures. Recently, trans-sacral epiduroscopic laser decompression for lumbar disc herniation has been reported with good results. In this study, we devised a new method to perform trans-sacral epiduroscopic laser ablation of the ligamentum flavum (LF), known to be the major cause of LSCS. Using a live pig, this study aims to evaluate the efficacy, safety, and drawbacks of this procedure. Methods Using an epiduroscope, we observed intra-spinal canal structures and then examined the feasibility and problems of a decompression procedure to ablate the LF using holmium:YAG (Ho:YAG) laser. The pig was observed for behavioral changes and neurological deficits after the procedure. Histological analysis was performed to evaluate the amount of tissue ablation and damage to surrounding tissues. Results Although it was possible to partially ablate the LF using the Ho:YAG laser under epiduroscopy, it was difficult to maintain a clear field of view, and freely decompressing the target lesion has been a challenge. After the first two experiments, the pig neither showed abnormal behavior nor any signs of pain or paresis. However, in the third experiment, the pig died during the operation. On autopsy, no thermal or mechanical injury was noted around the ablated site, including the dura mater and nerve root. Histological analysis showed that the LF and lamina were deeply ablated as the laser power increased, and no damage was noted on surrounding tissues beyond a depth of 500 μm. Conclusions Although Ho:YAG laser could ablate the ligamentum and bone tissues without causing damage to surrounding tissues, it was difficult to completely decompress the LF under epiduroscopy. This method is a potentially highly invasive procedure that requires caution in its clinical application and needs further improvement in terms of the instruments and techniques used.
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Affiliation(s)
- Shota Tamagawa
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Takatoshi Okuda
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Kei Miyagawa
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Tatsuya Sato
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Ryosuke Takahashi
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Arihisa Shimura
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery, Juntendo University School of Medicine
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15
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Tanaka M, Kanayama M, Hashimoto T, Oha F, Shimamura Y, Endo T, Tsujimoto T, Hara H, Hasegawa Y, Nojiri H, Ishijima M. Clinical Outcomes and Postoperative Radiographic Assessment of Osteoplastic Hemilaminectomy in the Treatment of Lumbar Foraminal Nerve Root Compression. Spine Surg Relat Res 2021; 5:352-358. [PMID: 34966860 PMCID: PMC8668207 DOI: 10.22603/ssrr.2020-0203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 12/20/2020] [Indexed: 11/30/2022] Open
Abstract
Introduction Osteoplastic hemilaminectomy for the treatment of lumbar foraminal nerve root compression is a safe technique as the exiting nerve root can be directly observed during neuroforaminal decompression without spinal fusion. Moreover, this procedure allows anatomical reconstruction of the posterior elements. However, there might be a potential risk for the progression of lumbar segmental instability after performing this procedure. This study aimed to review the radiographic and clinical outcomes of osteoplastic hemilaminectomy for the treatment of lumbar foraminal nerve root compression. Methods We retrospectively reviewed 51 patients who underwent osteoplastic hemilaminectomy with a minimum follow-up of 2 years. The clinical outcomes were evaluated using the visual analog scale (VAS) for low back pain, leg pain, and numbness and the Japanese Orthopaedic Association (JOA) score. Lumbar segmental instability was evaluated as a radiographic assessment using functional radiography. The mean follow-up period was 65 months. Results The preoperative VASs for low back pain, leg pain, and numbness were 46±31, 72±26, and 43±34, respectively, which were improved to 24±23, 19±23, and 19±23, respectively. The JOA score was also improved from 14±5 to 22±4. Three patients (5.9%) were reoperated due to recurrent disc herniation within 2 years following surgery. In addition, three patients (5.9%) developed postoperative lumbar segmental instability but did not require additional surgery. Conclusions The current study revealed that 94.1% of the patients who underwent osteoplastic hemilaminectomy achieved a significant improvement in the clinical outcomes and did not require additional surgery within 2 years following the procedure. Over a 5-year follow-up on average, 5.9% of the subjects developed postoperative lumbar segmental instability; however, they have maintained acceptable clinical conditions.
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Affiliation(s)
- Masaru Tanaka
- Spine Center, Hakodate Central General Hospital, Hokkaido, Japan.,Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | | | | | - Fumihiro Oha
- Spine Center, Hakodate Central General Hospital, Hokkaido, Japan
| | | | - Tsutomu Endo
- Spine Center, Hakodate Central General Hospital, Hokkaido, Japan
| | - Takeru Tsujimoto
- Spine Center, Hakodate Central General Hospital, Hokkaido, Japan
| | - Hiroyuki Hara
- Spine Center, Hakodate Central General Hospital, Hokkaido, Japan
| | - Yuichi Hasegawa
- Spine Center, Hakodate Central General Hospital, Hokkaido, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
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16
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Itoigawa Y, Yoshida K, Nojiri H, Morikawa D, Kawasaki T, Wada T, Koga A, Maruyama Y, Ishijima M. Association of Recurrent Tear After Arthroscopic Rotator Cuff Repair and Superoxide-Induced Oxidative Stress. Am J Sports Med 2021; 49:2048-2055. [PMID: 34015239 DOI: 10.1177/03635465211014856] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Recurrent tears after arthroscopic rotator cuff repair (ARCR) remain a significant clinical problem. Oxidative stress contributes to the degeneration of the rotator cuff, and a degenerative rotator cuff can lead to recurrent tear after ARCR. However, the correlation between oxidative stress and retear after ARCR is unclear. PURPOSE To investigate the correlation between superoxide-induced oxidative stress and recurrent tear after ARCR. STUDY DESIGN Case-control study; Level of evidence, 3. METHODS A total of 68 patients who underwent ARCR using a suture-bridge technique participated in this study. Specimens were collected from the edge of the torn tendon during surgery. The modified Bonar score was used to evaluate degeneration of the rotator cuff on histological specimens, and fluorescence intensity on dihydroethidium (DHE) staining was used to detect oxidative stress. Superoxide dismutase (SOD) enzyme activity was also measured. The following were used for clinical evaluation: age, tear size on magnetic resonance imaging (MRI) before surgery, Goutallier classification on MRI before surgery, and Japanese Orthopaedic Association score before and 6 months after surgery. After the repaired rotator cuffs were evaluated on MRI 6 months after surgery, the patients were divided into groups: those with a healed rotator cuff (healed group; n = 46) and those with a recurrent tear (retear group; n = 22). The significant differences between the groups were determined with regard to clinical evaluation, modified Bonar score, DHE intensity, and SOD activity. In addition, multivariate logistic regression analysis was performed to investigate risk factors for recurrent tear. RESULTS Age, tear size, Goutallier classification, modified Bonar score, DHE intensity, and SOD activity were significantly greater in the retear group than in the healed group, although the Japanese Orthopaedic Association score was not significantly different. Multiple logistic regression analysis demonstrated that age, tear size, and SOD activity were significantly correlated with recurrent tear. CONCLUSION In addition to tear size and age, superoxide-induced oxidative stress may be an exacerbating factor for retear after ARCR.
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Affiliation(s)
- Yoshiaki Itoigawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Keiichi Yoshida
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | - Daichi Morikawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Takayuki Kawasaki
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | - Tomoki Wada
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Akihisa Koga
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Yuichiro Maruyama
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
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17
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Tamagawa S, Okuda T, Nojiri H, Momomura R, Ishijima M. L5 nerve root injury caused by anterolateral malpositioning of loosened S1 pedicle screws: illustrative cases. Journal of Neurosurgery: Case Lessons 2021; 1:CASE21207. [PMID: 35855081 PMCID: PMC9245777 DOI: 10.3171/case21207] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 04/20/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND Although malpositioning of pedicle screws into the spinal canal and intervertebral foramen can cause spinal nerve root injuries, there are few reports of L5 nerve root injuries when S1 pedicle screws have been inserted anterolaterally. The authors report two cases of L5 nerve root injury caused by anterolateral malpositioning of loosened S1 pedicle screws. OBSERVATIONS In both patients, S1 pedicle screws were inserted toward the outside of the S1 anterior foramen, and the tip of the screws perforated the anterior sacral cortex. L5 nerve root impairment was not observed immediately after surgery. However, severe leg pain in the L5 area was observed after the S1 pedicle screws became loosened. In case 1, the symptoms could not be controlled with conservative treatment. Reoperation was performed 3 months after the initial surgery. In case 2, the symptoms gradually improved with conservative treatment because the area around the loosened S1 screw was surrounded by newly formed bone that stabilized the screws, as observed with computed tomography 1 year after surgery. LESSONS Surgeons should recognize that anterolateral malpositioning of S1 pedicle screws can cause L5 nerve root injury. The screws should be inserted in the correct direction without loosening.
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Affiliation(s)
- Shota Tamagawa
- Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo, Japan; and
| | - Takatoshi Okuda
- Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo, Japan; and
| | - Hidetoshi Nojiri
- Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo, Japan; and
| | - Rei Momomura
- Department of Orthopedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Muneaki Ishijima
- Department of Orthopedic Surgery, Juntendo University School of Medicine, Tokyo, Japan; and
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Nojiri H, Okuda T, Miyagawa K, Kobayashi N, Sato T, Hara T, Ohara Y, Kaneko K. Anterior Spinal Fusion Using Autologous Bone Grafting via the Lateral Approach with Posterior Short-Range Instrumentation for Lumbar Pyogenic Spondylitis with Vertebral Bone Destruction Enables Early Ambulation and Prevents Spinal Deformity. Spine Surg Relat Res 2020; 4:320-327. [PMID: 33195856 PMCID: PMC7661023 DOI: 10.22603/ssrr.2020-0049] [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: 03/30/2020] [Accepted: 05/01/2020] [Indexed: 02/06/2023] Open
Abstract
Introduction Pyogenic spondylitis of the lumbar spine markedly decreases the ability to perform activities of daily living and causes severe low back pain. The challenge is to improve low back pain and activities of daily living performance earlier and prevent post-infection sequelae, and conservative treatment with antibiotics is the mainstay of treatment. Methods In the present study, patients who were unable to walk following lumbar pyogenic spondylitis even in the subacute phase after successful infection control, showing bone defects expanding from endplate to vertebral body in CT, were treated with posterior percutaneous short-range instrumentation and anterior autogenous bone grafting (group S, n = 10) or with conservative treatment alone (group C, n = 10). Acute cases of absolute surgical indication with paralytic symptoms and mild cases who could walk by antibiotics administration were excluded. The two groups were compared regarding the post-treatment change in C-reactive protein level, duration of bed rest, and post-infection local spinal deformities (local scoliosis angle in the coronal plane and local kyphosis angle in the sagittal plane). Results Compared with group C, group S took a significantly shorter time for the C-reactive protein level to return to normal and required a significantly shorter duration of bed rest. Furthermore, surgery prevented the formation of kyphosis and scoliosis, while group C developed local kyphosis. Conclusions The minimally invasive surgical method of posterior percutaneous short-range instrumentation and anterior autogenous bone grafting effectively enables early control of pain and maintenance of locomotive function and prevents spinal deformity in patients with lumbar pyogenic spondylitis in the subacute phase with advanced vertebral bone destruction.
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Affiliation(s)
- Hidetoshi Nojiri
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Takatoshi Okuda
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Kei Miyagawa
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Nozomu Kobayashi
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Tatsuya Sato
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Takeshi Hara
- Department of Neurosurgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Yukoh Ohara
- Department of Neurosurgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
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Nakagawa M, Hara T, Iwamuro H, Sato T, Ohara Y, Kobayashi N, Nojiri H, Okuda T, Kaneko K, Nakajima M, Arai H. [Spinal Intradural Extramedullary Ependymoma:A Case Report]. No Shinkei Geka 2020; 48:819-825. [PMID: 32938810 DOI: 10.11477/mf.1436204278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Ependymoma is the most common primary intramedullary tumor of the spinal cord, accounting for a quarter of these tumors. We experienced a case of 'ependymoma of the spinal cord with a cystic lesion that presented as an intradural extramedullary tumor extending from the thoracic to lumbar vertebrae. In review of past literature on reports of spinal intradural extramedullary ependymoma, lesions spanning three or more vertebrae with cystic lesions were frequent, and about half were World Health Organization grade II or higher. Dissemination or recurrence of these tumors may occur after surgery. There is no consensus on postoperative adjuvant therapy for intradural extramedullary spinal ependymoma, but careful consideration should be given to the intraoperative findings and the characteristics of the tumor.
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Affiliation(s)
- Masaya Nakagawa
- Department of Neurosurgery, National Defense Medical College
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20
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Nojiri H, Okuda T, Miyagawa K, Kobayashi N, Sato T, Hara T, Ohara Y, Kudo H, Sakai T, Kaneko K. Localization of the Lumbar Plexus in the Psoas Muscle: Considerations for Avoiding Lumbar Plexus Injury during the Transpsoas Approach. Spine Surg Relat Res 2020; 5:86-90. [PMID: 33842715 PMCID: PMC8026205 DOI: 10.22603/ssrr.2020-0074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022] Open
Abstract
Introduction Transpsoas lumbar spine surgery is minimally invasive and has very good corrective effects. However, approach-side nerve complications delay post-operative rehabilitation. We anatomically investigated the localization of the lumbar plexus running in the psoas muscle. Methods We examined 27 formalin-fixed cadavers. The left-sided psoas muscle was extracted and cut parallel to the intervertebral disc at the L2/3, L3/4, and L4/5 disc levels. Using digitized photographs, we calculated the ratio of the distance from the front edge of the psoas muscle to the center of the lumbar plexus in the anteroposterior diameter of the psoas muscle (%). Then, we calculated the ratio of the distance from the lateral edge of the psoas muscle to the center of the lumbar plexus in the lateral diameter of the psoas muscle (%). Results The anterior-posterior lumbar plexus localization was 74.5 at L2/3, 74.7 at L3/4, and 81.2 at L4/5. There was a significant difference between L2/3 and L4/5 and between L3/4 and L4/5, but not between L2/3 and L3/4 (P=0.02, 0.01, and 0.94, respectively). The lateral and medial lumbar plexus localization was 85.4 at L2/3, 83.9 at L3/4, and 77.7 at L4/5. There was a significant difference between L2/3 and L4/5 and between L3/4 and L4/5, but not between L2/3 and L3/4 (P=0.01, 0.04, and 0.41, respectively). Conclusions The lumbar plexus was localized in the posterior one-third and medial one-third of the psoas muscle and moved to a posterolateral location at L4/5. To avoid neuropathy, consider the psoas muscle's position relative to that of the intervertebral disc. It is essential to understand lumbar plexus localization in the psoas muscle when looking directly at this muscle to enter the pricking point or route with a lower risk of nerve damage.
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Affiliation(s)
- Hidetoshi Nojiri
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Takatoshi Okuda
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Kei Miyagawa
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Nozomu Kobayashi
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Tatsuya Sato
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Takeshi Hara
- Department of Neurosurgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Yukoh Ohara
- Department of Neurosurgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
| | - Hiroyuki Kudo
- Department of Anatomy and Life Structure, Juntendo University, Tokyo, Japan
| | - Tatsuo Sakai
- Department of Anatomy and Life Structure, Juntendo University, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.,Spine and Spinal Cord Center, Juntendo Hospital, Juntendo University School of Medicine, Tokyo, Japan
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21
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Kaneko A, Naito K, Nagura N, Obata H, Goto K, Sugiyama Y, Koike M, Nojiri H, Iwase Y, Kaneko K. Characteristics of sagittal spine alignment in female patients with distal radius fractures due to fall. Heliyon 2020; 6:e04756. [PMID: 32904191 PMCID: PMC7452564 DOI: 10.1016/j.heliyon.2020.e04756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/17/2020] [Accepted: 08/17/2020] [Indexed: 01/08/2023] Open
Abstract
Objectives Distal radius fractures occur due to reflex clasp when falling. Recently, attention has been focused on the strong relationship between sagittal spine alignment and falls. Therefore, we investigated the parameters of sagittal spinal alignment in distal radius fractures in female patients. Patients and methods The subjects were group D: 28 female patients with distal radius fractures aged 50 years or older (mean age: 69.3 years), and group C: 26 healthy female patients without a history of fragility fractures (mean age: 70.5 years). Height, body weight, and body mass index (BMI) were measured as physical indices. As parameters of sagittal spinal alignment, the sagittal vertical axis (SVA), pelvic tilt (PT), pelvic incidence (PI), sacral slope (SS), lumber lordosis (LL), and thoracic kyphosis (TK) were measured on lateral whole-spine plain radiographs in a standing position. The measured physical indices and sagittal spinal alignment parameters were compared between groups. Results Height, weight, and BMI did not differ significantly between the two groups. Among the sagittal spinal alignment parameters, PT, PI, SS, LL, and TK did not differ significantly between groups, whereas SVA was significantly higher in group D than in group C (P < 0.05). Conclusion In this study, SVA was significantly higher in group D than in group C. As SVA increased, the center of gravity of the body shifts forward, which can cause the body to lose balance and fall. This study suggested that an increase in SVA is associated with distal radius fractures.
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Affiliation(s)
- Ayaka Kaneko
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
| | - Kiyohito Naito
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
| | - Nana Nagura
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
| | - Hiroyuki Obata
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
| | - Kenji Goto
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
| | - Yoichi Sugiyama
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan.,Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Masato Koike
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
| | - Yoshiyuki Iwase
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
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22
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Homma Y, Ishii S, Yanagisawa N, Ochi H, Baba T, Nojiri H, Okuda T, Kaneko K. Pelvic mobility before and after total hip arthroplasty. Int Orthop 2020; 44:2267-2274. [PMID: 32623495 DOI: 10.1007/s00264-020-04688-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/26/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND Pre-operative evaluation of pelvic motion using the sacral slope (SS) has been proposed for risk assessment of dislocation after total hip arthroplasty (THA). The purposes of this study were to elucidate the statistical characteristics of pre-operative and post-operative pelvic mobility and investigate the relationship between pre-operative spinopelvic factors and post-operative pelvic mobility. METHODS Eighty-six patients with osteoarthritis were assessed. The parameters evaluated were lumbar lordosis angle and the SS in the standing and sitting preo-peratively and post-operatively. The pelvic mobility was defined as the difference in the SS between standing and sitting. The presence of osteoarthritis in the contralateral hip, spondylolisthesis, vertebral compression fracture and lumbar scoliosis was investigated. RESULTS The median (interquartile range) pre-operative and post-operative pelvic mobility was 19.0 (13.75-27.0) and 16.0 (10.0-25.25), respectively, with significant difference. The pre-operative SS while standing and pre-operative pelvic mobility were associated with post-operative pelvic mobility (r = 0.409, P < 0.05 and r = 0.533, P < 0.05). The multivariate linear regression analysis showed that the following factors contributed to post-operative pelvic mobility: incidence of osteoarthritis in the contralateral hip, lumbar scoliosis, pre-operative SS while standing and pre-operative SS while sitting. CONCLUSION The pre-operative and post-operative pelvic mobility is not equal and ranges widely among patients. In addition to assessment of pre-operative pelvic mobility, other pre-operative spinopelvic factors may also influence post-operative pelvic mobility, such as the SS while standing and sitting, the condition of the contralateral hip and the presence of scoliosis. Risk assessment for dislocation using these pre-operative factors may be useful before THA.
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Affiliation(s)
- Yasuhiro Homma
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. .,Medical Technology Innovation Center, Juntendo University, Tokyo, Japan.
| | - Seiya Ishii
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | | | - Hironori Ochi
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tomonori Baba
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Takatoshi Okuda
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kazuo Kaneko
- Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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23
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Do SH, Lee CH, Kihara T, Choi YS, Yoon S, Kim K, Cheong H, Chen WT, Chou F, Nojiri H, Choi KY. Randomly Hopping Majorana Fermions in the Diluted Kitaev System α-Ru_{0.8}Ir_{0.2}Cl_{3}. Phys Rev Lett 2020; 124:047204. [PMID: 32058744 DOI: 10.1103/physrevlett.124.047204] [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: 08/02/2019] [Revised: 10/09/2019] [Indexed: 06/10/2023]
Abstract
dc and ac magnetic susceptibility, magnetization, specific heat, and Raman scattering measurements are combined to probe low-lying spin excitations in α-Ru_{1-x}Ir_{x}Cl_{3} (x≈0.2), which realizes a disordered spin liquid. At intermediate energies (ℏω>3 meV), Raman spectroscopy evidences linearly ω-dependent Majorana-like excitations, obeying Fermi statistics. This points to robustness of a Kitaev paramagnetic state under spin vacancies. At low energies below 3 meV, we observe power-law dependences and quantum-critical-like scalings of the thermodynamic quantities, implying the presence of a weakly divergent low-energy density of states. This scaling phenomenology is interpreted in terms of the random hoppings of Majorana fermions. Our results demonstrate an emergent hierarchy of spin excitations in a diluted Kitaev honeycomb system subject to spin vacancies and bond randomness.
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Affiliation(s)
- Seung-Hwan Do
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - C H Lee
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - T Kihara
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
| | - Y S Choi
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Sungwon Yoon
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Kangwon Kim
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
| | - Hyeonsik Cheong
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
| | - Wei-Tin Chen
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Fangcheng Chou
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Taiwan Consortium of Emergent Crystalline Materials, Ministry of Science and Technology, Taipei 10622, Taiwan
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
| | - Kwang-Yong Choi
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
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Yoshida K, Itoigawa Y, Wada T, Maruyama Y, Nojiri H, Kawasaki T, Kaneko K. Association of Superoxide-Induced Oxidative Stress With Rotator Cuff Tears in Human Patients. J Orthop Res 2020; 38:212-218. [PMID: 31520427 DOI: 10.1002/jor.24472] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 09/03/2019] [Indexed: 02/04/2023]
Abstract
Rotator cuff degeneration is one of the factors contributing to rotator cuff tears. Oxidative stress is involved in tendon degeneration, and superoxide-induced oxidative stress plays a pathological role in regulating the balance between oxidation and reduction. The role of oxidative stress in rotator cuff tears, however, is unclear. This study, therefore, aimed to investigate the contribution of superoxide-induced oxidative stress to rotator cuff tears. Seventy patients were recruited and divided into two groups: patients with (Ruptured group) and those without (Unruptured group) a rotator cuff tear. Specimens from both groups were collected during surgery. Degeneration morphology was classified according to the degeneration score. Superoxide-induced oxidative stress was assessed according to dihydroethidium (DHE) relative fluorescence intensity, capacity for antioxidation according to superoxide dismutase (SOD) activity, and the balance between oxidation and reduction based on the redox ratio. Data were compared between groups. Correlations between the degeneration score and the oxidative stress factors were calculated. Degeneration score and DHE relative fluorescence intensity were significantly higher in the Ruptured than the Unruptured group. The SOD activity was not significantly different between groups. Degeneration score was positively correlated with both DHE relative fluorescence intensity and SOD activity. Thus, superoxide-induced oxidative stress and tendon degeneration were greater in rotator cuff tear tissues than in those with no tear, suggesting that oxidative imbalance may be involved in degenerative rotator cuff tears. Clinical Relevance: Understanding the mechanisms of superoxide-induced oxidative stress may lead to targeted tissue therapy for degenerative rotator cuff tears. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:212-218, 2020.
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Affiliation(s)
- Keiichi Yoshida
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu-shi, Chiba, 279-0021, Japan
| | - Yoshiaki Itoigawa
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu-shi, Chiba, 279-0021, Japan
| | - Tomoki Wada
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu-shi, Chiba, 279-0021, Japan
| | - Yuichiro Maruyama
- Department of Orthopaedic Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu-shi, Chiba, 279-0021, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | - Takayuki Kawasaki
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
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25
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Nojiri H, Miyagawa K, Yamaguchi H, Koike M, Iwase Y, Okuda T, Kaneko K. Intraoperative ultrasound visualization of paravertebral anatomy in the retroperitoneal space during lateral lumbar spine surgery. J Neurosurg Spine 2019; 31:334-337. [DOI: 10.3171/2019.3.spine181210] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 03/08/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVELumbar surgery via a lateral approach is a minimally invasive and highly useful procedure. However, care must be taken to avoid its potentially fatal complications of intestinal and vascular injuries. The object of this study was to evaluate the usefulness of intraoperative ultrasound in improving the safety of lateral lumbar spine surgery.METHODSA transvaginal ultrasound probe was inserted into the operative field, and the intestinal tract, kidney, psoas muscle, and vertebral body were identified using B-mode ultrasound. The aorta, vena cava, common iliac vessels, and lumbar arteries and their associated branches were identified using the color Doppler mode.RESULTSThe study cohort comprised 100 patients who underwent lateral lumbar spine surgery, 92 via a left-sided approach. The intestinal tract and kidney lateral to the psoas muscle on the anatomical approach pathway were visualized in 36 and 26 patients, respectively. A detachment maneuver displaced the intestinal tract and kidneys in an anteroinferior direction, enabling confirmation of the absence of organ tissues above the psoas. In all patients, the major vessels anterior to the vertebral bodies and the lumbar arteries and associated branches in the psoas on the approach path were clearly visualized in the Doppler mode, and their orientation, location, and positional relationship with regard to the vertebral bodies, intervertebral discs, and psoas were determined.CONCLUSIONSWhen approaching the lateral side of the lumbar spine in the retroperitoneal space, intraoperative ultrasound allows real-time identification of the blood vessels surrounding the lumbar spine, intestinal tract, and kidney in the approach path and improves the safety of surgery without increasing invasiveness.
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Affiliation(s)
- Hidetoshi Nojiri
- 1Department of Orthopedic Surgery, Juntendo University; and
- 2Department of Orthopedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Kei Miyagawa
- 2Department of Orthopedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Hiroto Yamaguchi
- 2Department of Orthopedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Masato Koike
- 2Department of Orthopedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Yoshiyuki Iwase
- 2Department of Orthopedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | | | - Kazuo Kaneko
- 1Department of Orthopedic Surgery, Juntendo University; and
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Affiliation(s)
- M. Watanabe
- J-PARC Center, JAEA, Ibaraki, Japan. E-mail:
| | - H. Nojiri
- Institute for Materials Research, Tohoku University, Miyagi, Japan. E-mail:
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27
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Zvyagin SA, Graf D, Sakurai T, Kimura S, Nojiri H, Wosnitza J, Ohta H, Ono T, Tanaka H. Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs 2CuCl 4. Nat Commun 2019; 10:1064. [PMID: 30842420 PMCID: PMC6403288 DOI: 10.1038/s41467-019-09071-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 02/13/2019] [Indexed: 11/23/2022] Open
Abstract
Quantum triangular-lattice antiferromagnets are important prototype systems to investigate numerous phenomena of the geometrical frustration in condensed matter. Apart from highly unusual magnetic properties, they possess a rich phase diagram (ranging from an unfrustrated square lattice to a quantum spin liquid), yet to be confirmed experimentally. One major obstacle in this area of research is the lack of materials with appropriate (ideally tuned) magnetic parameters. Using Cs2CuCl4 as a model system, we demonstrate an alternative approach, where, instead of the chemical composition, the spin Hamiltonian is altered by hydrostatic pressure. The approach combines high-pressure electron spin resonance and r.f. susceptibility measurements, allowing us not only to quasi-continuously tune the exchange parameters, but also to accurately monitor them. Our experiments indicate a substantial increase of the exchange coupling ratio from 0.3 to 0.42 at a pressure of 1.8 GPa, revealing a number of emergent field-induced phases. Theoretical studies of quantum magnetism typically assume idealised lattices with freely tunable parameters, which are difficult to realise experimentally. Zvyagin et al. perform challenging measurements at high pressures to tune and to accurately monitor the exchange parameters of a triangular lattice antiferromagnet.
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Affiliation(s)
- S A Zvyagin
- Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany.
| | - D Graf
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA
| | - T Sakurai
- Research Facility Center for Science and Technology, Kobe University, Kobe, 657-8501, Japan
| | - S Kimura
- Institute for Materials Research, Tohoku University, Sendai, 980-8578, Japan
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Sendai, 980-8578, Japan
| | - J Wosnitza
- Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany.,Institut für Festkörper- und Materialphysik, TU Dresden, 01062, Dresden, Germany
| | - H Ohta
- Molecular Photoscience Research Center, Kobe University, Kobe, 657-8501, Japan
| | - T Ono
- Department of Physical Science, Osaka Prefecture University, Osaka, 599-8531, Japan
| | - H Tanaka
- Department of Physics, Tokyo Institute of Technology, Tokyo, 152-8551, Japan
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28
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Sakurai T, Kimura S, Kimata M, Nojiri H, Awaji S, Okubo S, Ohta H, Uwatoko Y, Kudo K, Koike Y. Development and application of 2.5 GPa-25 T high-pressure high-field electron spin resonance system using a cryogen-free superconducting magnet. J Magn Reson 2018; 296:1-4. [PMID: 30165264 DOI: 10.1016/j.jmr.2018.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
We have developed a high-pressure electron spin resonance probe and successfully installed into the world's highest-field cryogen-free superconducting magnet having a maximum central field of 24.6 T. The high pressure of 2.5 GPa is achieved by the specially designed piston-cylinder pressure cell using THz-wave-transparent components. In the first application of this high-pressure high-field ESR system, we observed that the orthogonal dimer spin system SrCu2(BO3)2 undergoes a quantum phase transition from the dimer singlet ground to the plaquette singlet ground states.
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Affiliation(s)
- T Sakurai
- Research Facility Center for Science and Technology, Kobe University, Nada, Kobe 657-8501, Japan.
| | - S Kimura
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - M Kimata
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - S Awaji
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - S Okubo
- Molecular Photoscience Research Center, Kobe University, Nada, Kobe 657-8501, Japan
| | - H Ohta
- Molecular Photoscience Research Center, Kobe University, Nada, Kobe 657-8501, Japan
| | - Y Uwatoko
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - K Kudo
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - Y Koike
- Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan
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29
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Koike M, Nojiri H, Kanazawa H, Yamaguchi H, Miyagawa K, Nagura N, Banno S, Iwase Y, Kurosawa H, Kaneko K. Superoxide dismutase activity is significantly lower in end-stage osteoarthritic cartilage than non-osteoarthritic cartilage. PLoS One 2018; 13:e0203944. [PMID: 30222787 PMCID: PMC6141073 DOI: 10.1371/journal.pone.0203944] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 08/30/2018] [Indexed: 12/31/2022] Open
Abstract
Recent studies have shown that superoxide dismutase 1 (SOD1), SOD2, and SOD3 are significantly decreased in human osteoarthritic cartilage. SOD activity is a marker that can be used to comprehensively evaluate the enzymatic capacities of SOD1, SOD2, and SOD3; however, the trend of SOD activity in end-stage osteoarthritic tissues remains unknown. In the present study, we found that SOD activity in end-stage osteoarthritic synovium of the knee was significantly lower than that in control synovium without the influence of age. The SOD activity was significantly lower in the end-stage knee osteoarthritic cartilage than in the control, but a weak negative correlation was observed between aging and SOD activity. However, SOD activity in end-stage hip osteoarthritic cartilage was significantly lower than that in control cartilage without the influence of aging. The relationship between osteoarthritis and SOD activity was stronger than the relationship between aging and SOD activity. These results indicate that direct regulation of SOD activity in joint tissues may lead to suppression of osteoarthritis progression.
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Affiliation(s)
- Masato Koike
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
- * E-mail:
| | - Hiroaki Kanazawa
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Hiroto Yamaguchi
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Kei Miyagawa
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Nana Nagura
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Sammy Banno
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Yoshiyuki Iwase
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Hisashi Kurosawa
- Department of Orthopaedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Orthopaedic Surgery, Juntendo University Graduate School of Medicine, Tokyo, Japan
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30
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Díaz-Ortega IF, Herrera JM, Aravena D, Ruiz E, Gupta T, Rajaraman G, Nojiri H, Colacio E. Designing a Dy2 Single-Molecule Magnet with Two Well-Differentiated Relaxation Processes by Using a Nonsymmetric Bis-bidentate Bipyrimidine-N-Oxide Ligand: A Comparison with Mononuclear Counterparts. Inorg Chem 2018; 57:6362-6375. [DOI: 10.1021/acs.inorgchem.8b00427] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ismael F. Díaz-Ortega
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain
| | - Juan Manuel Herrera
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain
| | - Daniel Aravena
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Santiago, Chile
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Tulika Gupta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - H. Nojiri
- Institute for Materials Research, Tohoku University, Katahira, Sendai, 980-8577, Japan
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain
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31
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Masuda I, Koike M, Nakashima S, Mizutani Y, Ozawa Y, Watanabe K, Sawada Y, Sugiyama H, Sugimoto A, Nojiri H, Sashihara K, Yokote K, Shimizu T. Apple procyanidins promote mitochondrial biogenesis and proteoglycan biosynthesis in chondrocytes. Sci Rep 2018; 8:7229. [PMID: 29739985 PMCID: PMC5940809 DOI: 10.1038/s41598-018-25348-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 11/10/2017] [Accepted: 04/20/2018] [Indexed: 12/21/2022] Open
Abstract
Apples are well known to have various benefits for the human body. Procyanidins are a class of polyphenols found in apples that have demonstrated effects on the circulatory system and skeletal organs. Osteoarthritis (OA) is a locomotive syndrome that is histologically characterized by cartilage degeneration associated with the impairment of proteoglycan homeostasis in chondrocytes. However, no useful therapy for cartilage degeneration has been developed to date. In the present study, we detected beneficial effects of apple polyphenols or their procyanidins on cartilage homeostasis. An in vitro assay revealed that apple polyphenols increased the activities of mitochondrial dehydrogenases associated with an increased copy number of mitochondrial DNA as well as the gene expression of peroxisome proliferator-activated receptor gamma coactivator 1-α (PGC-1α), suggesting the promotion of PGC-1α-mediated mitochondrial biogenesis. Apple procyanidins also enhanced proteoglycan biosynthesis with aggrecan upregulation in primary chondrocytes. Of note, oral treatment with apple procyanidins prevented articular cartilage degradation in OA model mice induced by mitochondrial dysfunction in chondrocytes. Our findings suggest that apple procyanidins are promising food components that inhibit OA progression by promoting mitochondrial biogenesis and proteoglycan homeostasis in chondrocytes.
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Affiliation(s)
- Isao Masuda
- Department of Functional Materials Technology, Core Technology Laboratories, Asahi Group Holdings, Ltd., Ibaraki, Japan.,Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.,Products Development Department, Asahi Calpis Wellness Co., Ltd., Kanagawa, Japan
| | - Masato Koike
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shohei Nakashima
- Department of Functional Materials Technology, Core Technology Laboratories, Asahi Group Holdings, Ltd., Ibaraki, Japan.,Products Development Department, Asahi Calpis Wellness Co., Ltd., Kanagawa, Japan
| | - Yu Mizutani
- Department of Functional Materials Technology, Core Technology Laboratories, Asahi Group Holdings, Ltd., Ibaraki, Japan
| | - Yusuke Ozawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kenji Watanabe
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yoko Sawada
- Products Development Department, Asahi Calpis Wellness Co., Ltd., Kanagawa, Japan
| | | | - Atsushi Sugimoto
- Quality Assurance Department, Quality Assurance Headquarters, Asahi Group Foods, Ltd., Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Koichi Sashihara
- Department of Functional Materials Technology, Core Technology Laboratories, Asahi Group Holdings, Ltd., Ibaraki, Japan
| | - Koutaro Yokote
- Department of Clinical Cell Biology and Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Takahiko Shimizu
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan. .,Department of Clinical Cell Biology and Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
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32
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Morikawa D, Nojiri H, Itoigawa Y, Ozawa Y, Kaneko K, Shimizu T. Antioxidant treatment with vitamin C attenuated rotator cuff degeneration caused by oxidative stress in Sod1-deficient mice. JSES Open Access 2018; 2:91-96. [PMID: 30675573 PMCID: PMC6334861 DOI: 10.1016/j.jses.2017.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background Rotator cuff degeneration is 1 of several factors that lead to rotator cuff tears; however, the mechanism of this degeneration remains unclear. We previously reported that deficiency of an antioxidant enzyme, superoxide dismutase 1 (Sod1), in mice induced degeneration in supraspinatus tendon entheses, a model that replicates human rotator cuff degeneration. In this study, we analyzed possible effects of vitamin C (VC), a major antioxidant, on the degenerative changes of supraspinatus entheses in Sod1−/− mice. Methods We administered VC or vehicle, distilled water, for 8 weeks to Sod1−/− and wild-type male mice beginning at 12 weeks of age (n = 5-8 per group). When mice were 20 weeks of age, we sectioned rotator cuff tissue samples and performed hematoxylin-eosin and toluidine blue staining for quantitative histologic evaluation. Results VC administration, compared with vehicle administration, attenuated the histologic changes, including a misaligned 4-layered structure, fragmented tidemark, and toluidine blue staining, in the supraspinatus entheses of Sod1−/− mice. In the quantitative histologic evaluation, all parameters were significantly decreased in Sod1−/− mice compared with wild-type mice, except for the number of nonchondrocytes. Conclusion We demonstrated that an antioxidant treatment, VC administration, attenuated the rotator cuff degeneration, similar to that observed in humans, that is caused by oxidative stress in Sod1−/− mice. VC effects included improvements in quantitative histologic parameters and other histologic changes. These results suggest that VC treatment can prevent oxidative stress–induced degeneration of the rotator cuff.
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Affiliation(s)
- Daichi Morikawa
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Corresponding author: Hidetoshi Nojiri, MD, PhD, Department of Orthopaedics, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan. (H. Nojiri)
| | - Yoshiaki Itoigawa
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yusuke Ozawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kazuo Kaneko
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takahiko Shimizu
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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33
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Kinoshita M, Ishijima M, Kaneko H, Liu L, Nagao M, Sadatsuki R, Hada S, Arita H, Aoki T, Yamanaka M, Nojiri H, Sakamoto Y, Tokita A, Kaneko K. The increase in bone mineral density by bisphosphonate with active vitamin D analog is associated with the serum calcium level within the reference interval in postmenopausal osteoporosis. Mod Rheumatol 2018; 29:157-164. [PMID: 29451049 DOI: 10.1080/14397595.2018.1442671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVES To examine the factors associated with increase in lumbar spine bone mineral density (LS-BMD) by bisphosphonates (BPs) with active vitamin D analog (aVD). METHODS Two independent postmenopausal osteoporotic patients treated by BPs with aVD for 24 months (Study 1: n = 93, Study 2: n = 99) were retrospectively analyzed. RESULTS In Study 1, LS-BMD of the patients significantly increased for 24 m (5.4%, p < .001). A multiple regression analysis among baseline characteristics revealed that serum calcium (sCa: 8.5-10.5 mg/dL) was associated with an increased LS-BMD by treatment (r2: 0.088, p = .02). While average sCa of the patients was 9.2 mg/dL before treatment, it increased time-dependently to 9.6 mg/dL for 24 m by treatment. As each patient had their LS-BMD five times during the study, there were four instances of %LS-BMD in each patient, resulting in 372 instances of %LS-BMD in Study 1. The smallest Akaike's information criterion value for the most appropriate cut-off levels of sCa for %LS-BMD by treatment every 6 m was 9.3 mg/dL. The %LS-BMD by treatment for 6 m during 24 m period in patients with sCa ≥9.3 mg/dL (1.5%) was significantly higher than that in patients with sCa <9.3 mg/dL (0.8%, p = .038). The results of Study 2 were similar to those of Study 1, confirming the phenomena observed. CONCLUSION sCa was associated with an increased LS-BMD by BPs with aVD.
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Affiliation(s)
- Mayuko Kinoshita
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Muneaki Ishijima
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan.,b Sportology Center , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Haruka Kaneko
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Lizu Liu
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan.,b Sportology Center , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Masashi Nagao
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Ryo Sadatsuki
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Shinnosuke Hada
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Hitoshi Arita
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Takako Aoki
- b Sportology Center , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Makoto Yamanaka
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Hidetoshi Nojiri
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Yuko Sakamoto
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Akifumi Tokita
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan
| | - Kazuo Kaneko
- a Department of Medicine for Orthopedics and Motor Organ , Graduate School of Medicine, Juntendo University , Tokyo , Japan.,b Sportology Center , Graduate School of Medicine, Juntendo University , Tokyo , Japan
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34
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Shimura Y, Kurosawa H, Tsuchiya M, Sawa M, Kaneko H, Liu L, Makino Y, Nojiri H, Iwase Y, Kaneko K, Ishijima M. Serum interleukin 6 levels are associated with depressive state of the patients with knee osteoarthritis irrespective of disease severity. Clin Rheumatol 2017; 36:2781-2787. [PMID: 28900748 DOI: 10.1007/s10067-017-3826-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 08/26/2017] [Accepted: 09/04/2017] [Indexed: 01/15/2023]
Abstract
This cross-sectional study investigated the prevalence of depressive state and association between depressive state and serum interleukin (IL)-6 levels in knee osteoarthritis (OA) patients. A total of 115 painful knee OA patients were enrolled and divided into two groups according to the radiographic OA severity. Pain was evaluated using a visual analog scale (VAS). Depressive state was assessed by the self-rating depression scale (SDS). Serum IL-6 levels were also measured. Pearson's correlation coefficient was used to assess the correlation between the variants tested, and logistic regression analysis was used to identify factors associated with the depressive state. Fifty-two percent of the patients had an SDS score of ≥ 40, which is indicative of the depressive state. The pain VAS score (r = 0.22, p = 0.02) and serum IL-6 level (r = 0.31, p < 0.01) were independently associated with the SDS score of all early-stage knee OA patients (Kellgren-Lawrence [K/L] grade 2). However, only the serum IL-6 level was independently associated with the SDS scores of advanced-stage knee OA patients (K/L grades 3 and 4, r = 0.36, p < 0.01). A logistic regression analysis revealed that serum IL-6 level was the variable for the SDS score [odds ratio 1.41 (95% confidence interval 1.03-1.94, p < 0.03)]. Approximately half of the knee OA patients were found to be in the depressive state, and their serum IL-6 levels to be associated with the depressive state, irrespective of OA severity.
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Affiliation(s)
- Yukio Shimura
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan.,Minamikoshigaya Hospital, Koshigaya, Saitama, Japan
| | - Hisashi Kurosawa
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Masaru Tsuchiya
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Mamiko Sawa
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Haruka Kaneko
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Lizu Liu
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuji Makino
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Yoshiyuki Iwase
- Department of Orthopedics, Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan. .,Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan.
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35
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Grafe HJ, Nishimoto S, Iakovleva M, Vavilova E, Spillecke L, Alfonsov A, Sturza MI, Wurmehl S, Nojiri H, Rosner H, Richter J, Rößler UK, Drechsler SL, Kataev V, Büchner B. Signatures of a magnetic field-induced unconventional nematic liquid in the frustrated and anisotropic spin-chain cuprate LiCuSbO 4. Sci Rep 2017; 7:6720. [PMID: 28751668 PMCID: PMC5532373 DOI: 10.1038/s41598-017-06525-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 06/14/2017] [Indexed: 11/09/2022] Open
Abstract
Modern theories of quantum magnetism predict exotic multipolar states in weakly interacting strongly frustrated spin-1/2 Heisenberg chains with ferromagnetic nearest neighbor (NN) inchain exchange in high magnetic fields. Experimentally these states remained elusive so far. Here we report strong indications of a magnetic field-induced nematic liquid arising above a field of ~13 T in the edge-sharing chain cuprate LiSbCuO4 ≡ LiCuSbO4. This interpretation is based on the observation of a field induced spin-gap in the measurements of the 7Li NMR spin relaxation rate T 1-1 as well as a contrasting field-dependent power-law behavior of T 1-1 vs. T and is further supported by static magnetization and ESR data. An underlying theoretical microscopic approach favoring a nematic scenario is based essentially on the NN XYZ exchange anisotropy within a model for frustrated spin-1/2 chains and is investigated by the DMRG technique. The employed exchange parameters are justified qualitatively by electronic structure calculations for LiCuSbO4.
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Affiliation(s)
- H-J Grafe
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany
| | - S Nishimoto
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany.,Institute for Theoretical Physics, Technical University Dresden, D-01069, Dresden, Germany
| | - M Iakovleva
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany.,Zavoisky Physical-Technical Institute of the Russian Academy of Sciences, 420029, Kazan, Russia
| | - E Vavilova
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany.,Zavoisky Physical-Technical Institute of the Russian Academy of Sciences, 420029, Kazan, Russia
| | - L Spillecke
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany.,Institute for Solid State Physics, Technical University Dresden, D-01069, Dresden, Germany
| | - A Alfonsov
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany
| | - M-I Sturza
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany
| | - S Wurmehl
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany
| | - H Nojiri
- Institute of Materials Research, Tohoku University, 980-8577, Sendai, Japan
| | - H Rosner
- Max-Planck-Institute for Chemical Physics of Solids, Dresden, Germany
| | - J Richter
- Universität Magdeburg, Institut für Theoretische Physik, Magdeburg, Germany
| | - U K Rößler
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany
| | - S-L Drechsler
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany
| | - V Kataev
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany.
| | - B Büchner
- Leibniz Institute for Solid State and Materials Research IFW-Dresden, D-01171, Dresden, Germany.,Institute for Solid State Physics, Technical University Dresden, D-01069, Dresden, Germany
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36
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Inada T, Yamazaki T, Namba T, Asai S, Kobayashi T, Tamasaku K, Tanaka Y, Inubushi Y, Sawada K, Yabashi M, Ishikawa T, Matsuo A, Kawaguchi K, Kindo K, Nojiri H. Search for Two-Photon Interaction with Axionlike Particles Using High-Repetition Pulsed Magnets and Synchrotron X Rays. Phys Rev Lett 2017; 118:071803. [PMID: 28256869 DOI: 10.1103/physrevlett.118.071803] [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] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Indexed: 06/06/2023]
Abstract
We report on new results of a search for a two-photon interaction with axionlike particles (ALPs). The experiment is carried out at a synchrotron radiation facility using a "light shining through a wall (LSW)" technique. For this purpose, we develop a novel pulsed-magnet system, composed of multiple racetrack magnets and a transportable power supply. It produces fields of about 10 T over 0.8 m with a high repetition rate of 0.2 Hz and yields a new method of probing a vacuum with high intensity fields. The data obtained with a total of 27 676 pulses provide a limit on the ALP-two-photon coupling constant that is more stringent by a factor of 5.2 compared to a previous x-ray LSW limit for the ALP mass ≲0.1 eV.
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Affiliation(s)
- T Inada
- International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Yamazaki
- International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Namba
- International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - S Asai
- Department of Physics, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Kobayashi
- International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - K Tamasaku
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Y Tanaka
- Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
| | - Y Inubushi
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - K Sawada
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - M Yabashi
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - T Ishikawa
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - A Matsuo
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8581, Japan
| | - K Kawaguchi
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8581, Japan
| | - K Kindo
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8581, Japan
| | - H Nojiri
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Knafo W, Duc F, Bourdarot F, Kuwahara K, Nojiri H, Aoki D, Billette J, Frings P, Tonon X, Lelièvre-Berna E, Flouquet J, Regnault LP. Field-induced spin-density wave beyond hidden order in URu 2Si 2. Nat Commun 2016; 7:13075. [PMID: 27762260 PMCID: PMC5080431 DOI: 10.1038/ncomms13075] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 08/31/2016] [Indexed: 11/09/2022] Open
Abstract
URu2Si2 is one of the most enigmatic strongly correlated electron systems and offers a fertile testing ground for new concepts in condensed matter science. In spite of >30 years of intense research, no consensus on the order parameter of its low-temperature hidden-order phase exists. A strong magnetic field transforms the hidden order into magnetically ordered phases, whose order parameter has also been defying experimental observation. Here, thanks to neutron diffraction under pulsed magnetic fields up to 40 T, we identify the field-induced phases of URu2Si2 as a spin-density-wave state. The transition to the spin-density wave represents a unique touchstone for understanding the hidden-order phase. An intimate relationship between this magnetic structure, the magnetic fluctuations and the Fermi surface is emphasized, calling for dedicated band-structure calculations. The strongly-correlated electron system URu2Si2 possesses a hidden-order phase whose order parameter remains unidentified. Here, the authors demonstrate the development of spin-density-wave phases in URu2Si2 under high magnetic fields, providing a potential in-road to understanding this system.
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Affiliation(s)
- W Knafo
- Laboratoire National des Champs Magnétiques Intenses, UPR 3228, CNRS-UPS-INSA-UGA, 143 Avenue de Rangueil, 31400 Toulouse, France
| | - F Duc
- Laboratoire National des Champs Magnétiques Intenses, UPR 3228, CNRS-UPS-INSA-UGA, 143 Avenue de Rangueil, 31400 Toulouse, France
| | - F Bourdarot
- Service de Modélisation et d'Exploration des Matériaux, Université Grenoble Alpes et Commissariat á l'Energie Atomique, INAC, 17 rue des Martyrs, 38054 Grenoble, France
| | - K Kuwahara
- Institute of Quantum Beam Science, Ibaraki University, Mito 310-8512, Japan
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Sendai 980-8578, Japan
| | - D Aoki
- Institute for Materials Research, Tohoku University, Ibaraki 311-1313, Japan.,Service Photonique, Electronique et Ingénierie Quantiques, Université Grenoble Alpes et Commissariat à l'Energie Atomique, INAC, 17 rue des Martyrs, 38054 Grenoble, France
| | - J Billette
- Laboratoire National des Champs Magnétiques Intenses, UPR 3228, CNRS-UPS-INSA-UGA, 143 Avenue de Rangueil, 31400 Toulouse, France
| | - P Frings
- Laboratoire National des Champs Magnétiques Intenses, UPR 3228, CNRS-UPS-INSA-UGA, 143 Avenue de Rangueil, 31400 Toulouse, France
| | - X Tonon
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble, France
| | - E Lelièvre-Berna
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble, France
| | - J Flouquet
- Service Photonique, Electronique et Ingénierie Quantiques, Université Grenoble Alpes et Commissariat à l'Energie Atomique, INAC, 17 rue des Martyrs, 38054 Grenoble, France
| | - L-P Regnault
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble, France
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Gerber S, Jang H, Nojiri H, Matsuzawa S, Yasumura H, Bonn DA, Liang R, Hardy WN, Islam Z, Mehta A, Song S, Sikorski M, Stefanescu D, Feng Y, Kivelson SA, Devereaux TP, Shen ZX, Kao CC, Lee WS, Zhu D, Lee JS. Three-dimensional charge density wave order in YBa2Cu3O6.67 at high magnetic fields. Science 2015; 350:949-52. [PMID: 26541608 DOI: 10.1126/science.aac6257] [Citation(s) in RCA: 238] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 09/30/2015] [Indexed: 11/02/2022]
Abstract
Charge density wave (CDW) correlations have been shown to universally exist in cuprate superconductors. However, their nature at high fields inferred from nuclear magnetic resonance is distinct from that measured with x-ray scattering at zero and low fields. We combined a pulsed magnet with an x-ray free-electron laser to characterize the CDW in YBa2Cu3O6.67 via x-ray scattering in fields of up to 28 tesla. While the zero-field CDW order, which develops at temperatures below ~150 kelvin, is essentially two dimensional, at lower temperature and beyond 15 tesla, another three-dimensionally ordered CDW emerges. The field-induced CDW appears around the zero-field superconducting transition temperature; in contrast, the incommensurate in-plane ordering vector is field-independent. This implies that the two forms of CDW and high-temperature superconductivity are intimately linked.
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Affiliation(s)
- S Gerber
- Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - H Jang
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
| | - S Matsuzawa
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
| | - H Yasumura
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
| | - D A Bonn
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada. Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
| | - R Liang
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada. Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
| | - W N Hardy
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada. Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
| | - Z Islam
- The Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - A Mehta
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S Song
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - M Sikorski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - D Stefanescu
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Y Feng
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S A Kivelson
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - Z-X Shen
- Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA. Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - C-C Kao
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - W-S Lee
- Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.
| | - D Zhu
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
| | - J-S Lee
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
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Ochi H, Baba T, Homma Y, Matsumoto M, Nojiri H, Kaneko K. Importance of the spinopelvic factors on the pelvic inclination from standing to sitting before total hip arthroplasty. Eur Spine J 2015; 25:3699-3706. [PMID: 26329653 DOI: 10.1007/s00586-015-4217-2] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 08/26/2015] [Accepted: 08/26/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Dislocation after total hip arthroplasty (THA) is a major postoperative complication. Even if the cup is in the safe zone, dislocation caused by implant impingement may occur during postural changes. The aim of the present study was to investigate the spinopelvic factors that influence pelvic inclination changes from standing to sitting in patients with hip diseases who were candidates for THA. METHODS 74 patients who underwent primary THA were included according to our criteria. The analysis of the sagittal balance of the spinopelvic complex was performed on standing and sitting lateral radiographs. Pelvic incidence (PI), sacral slope (SS), pelvic tilt (PT), lumbar lordosis angle (LLA), thoracic kyphosis angle (TK), and sagittal vertical axis (SVA) were measured. The differences between the standing and sitting positions regarding the spinal and pelvic parameters were analyzed. Correlations between the variables of the spinopelvic parameters were examined using Spearman's rank correlation coefficient. RESULTS The changes in SVA, TK, LLA, SS, PT, and PI from the standing to sitting positions, respectively, were -3.9 ± 48.2 mm, -0.1° ± 6.4°, 21.4° ± 17.7°, 22.2° ± 12.2°, -22.3° ± 13.2°, and 0.4° ± 6.9°. The lumbar lordosis was reduced and pelvic rotation was extended from the standing to the sitting position. The correlation coefficient between the change in the SS and that in the LLA was 0.72 (p < 0.0001). The correlation coefficient between the change in PT and that in the LLA was -0.68 (p < 0.0001). CONCLUSIONS The change in pelvic inclination from standing to sitting is strongly related to the mobility of the lumbar spine in patients with hip diseases.
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Affiliation(s)
- Hironori Ochi
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Tomonori Baba
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan.
| | - Yasuhiro Homma
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Mikio Matsumoto
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopedic Surgery, Juntendo Tokyo Koto Geriatric Medical Center, 3-3-20 Shinsuna, Koto-ku, Tokyo, Japan
| | - Kazuo Kaneko
- Department of Orthopedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
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40
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Koike M, Nojiri H, Ozawa Y, Watanabe K, Muramatsu Y, Kaneko H, Morikawa D, Kobayashi K, Saita Y, Sasho T, Shirasawa T, Yokote K, Kaneko K, Shimizu T. Mechanical overloading causes mitochondrial superoxide and SOD2 imbalance in chondrocytes resulting in cartilage degeneration. Sci Rep 2015; 5:11722. [PMID: 26108578 PMCID: PMC4480010 DOI: 10.1038/srep11722] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [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: 03/11/2015] [Accepted: 06/03/2015] [Indexed: 12/31/2022] Open
Abstract
Mechanical stress and aging are major risk factors of cartilage degeneration. Human studies have previously reported that oxidative damage increased, while SOD2 protein was reciprocally downregulated in osteoarthritic degenerated cartilage. However, it remains unclear whether mitochondrial superoxide imbalance in chondrocytes causes cartilage degeneration. We herein demonstrate that mechanical loading promoted mitochondrial superoxide generation and selective Sod2 downregulation in chondrocytes in vivo and that mitochondrial superoxide inducer also downregulated Sod2 expression in chondrocytes in vitro. A genetically manipulated model revealed that Sod2 deficiency in chondrocytes also resulted in mitochondrial superoxide overproduction and dysfunction, thus leading to cartilage degeneration. Intra-articular injection of a permeable antioxidant effectively suppressed the mechanical loading-induced mitochondrial superoxide generation and cartilage degeneration in mice. Our findings demonstrate that mitochondrial superoxide plays a pivotal role in the development and progression of osteoarthritis, and the mitochondrial superoxide balance may therefore be a promising target for the treatment of cartilage degeneration.
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Affiliation(s)
- Masato Koike
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yusuke Ozawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kenji Watanabe
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yuta Muramatsu
- Department of Orthopaedics, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Haruka Kaneko
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Daichi Morikawa
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Keiji Kobayashi
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoshitomo Saita
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takahisa Sasho
- Department of Orthopaedics, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Takuji Shirasawa
- Department of Aging Control Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Koutaro Yokote
- Department of Clinical Cell Biology and Medicine' Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kazuo Kaneko
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takahiko Shimizu
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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41
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Pregelj M, Zorko A, Zaharko O, Nojiri H, Berger H, Chapon LC, Arčon D. Spin-stripe phase in a frustrated zigzag spin-1/2 chain. Nat Commun 2015; 6:7255. [PMID: 26068618 PMCID: PMC4490353 DOI: 10.1038/ncomms8255] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 04/21/2015] [Indexed: 11/09/2022] Open
Abstract
Motifs of periodic modulations are encountered in a variety of natural systems, where at least two rival states are present. In strongly correlated electron systems, such behaviour has typically been associated with competition between short- and long-range interactions, for example, between exchange and dipole-dipole interactions in the case of ferromagnetic thin films. Here we show that spin-stripe textures may develop also in antiferromagnets, where long-range dipole-dipole magnetic interactions are absent. A comprehensive analysis of magnetic susceptibility, high-field magnetization, specific heat and neutron diffraction measurements unveils β-TeVO4 as a nearly perfect realization of a frustrated (zigzag) ferromagnetic spin-1/2 chain. Notably, a narrow spin-stripe phase develops at elevated magnetic fields due to weak frustrated short-range interchain exchange interactions, possibly assisted by the symmetry-allowed electric polarization. This concept provides an alternative route for the stripe formation in strongly correlated electron systems and may help understanding of other widespread, yet still elusive, stripe-related phenomena.
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Affiliation(s)
- M Pregelj
- Jožef Stefan Institute, Jamova c. 39, Ljubljana 1000, Slovenia
| | - A Zorko
- Jožef Stefan Institute, Jamova c. 39, Ljubljana 1000, Slovenia
| | - O Zaharko
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen CH-5232, Switzerland
| | - H Nojiri
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - H Berger
- Ecole polytechnique fédérale de Lausanne, Lausanne CH-1015, Switzerland
| | - L C Chapon
- Institut Laue-Langevin, BP 156X, Grenoble 38042, France
| | - D Arčon
- 1] Jožef Stefan Institute, Jamova c. 39, Ljubljana 1000, Slovenia [2] Faculty of Mathematics and Physics, University of Ljubljana, Jadranska c. 19, Ljubljana 1000, Slovenia
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42
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Kobayashi K, Nojiri H, Saita Y, Morikawa D, Ozawa Y, Watanabe K, Koike M, Asou Y, Shirasawa T, Yokote K, Kaneko K, Shimizu T. Mitochondrial superoxide in osteocytes perturbs canalicular networks in the setting of age-related osteoporosis. Sci Rep 2015; 5:9148. [PMID: 25779629 PMCID: PMC5376208 DOI: 10.1038/srep09148] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [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: 11/03/2014] [Accepted: 02/20/2015] [Indexed: 12/21/2022] Open
Abstract
Osteocytes are major bone cells that play a crucial role in maintaining the quality of and healing damage to bone tissue. The number of living osteocytes and canalicular networks declines in an age-dependent manner. However, the pathological effects of mitochondrial redox imbalances on osteocytes and bone metabolism have not been fully elucidated. We generated mice lacking mitochondrial superoxide dismutase 2 (Sod2) in osteocytes. Like an aged bone, Sod2 depletion in the osteocytes positively enhanced the production of cellular superoxide in vivo. A bone morphological analysis demonstrated that the Sod2-deficient femurs showed remarkable bone loss in an age-dependent manner. Interestingly, Sod2 loss induced markedly disorganized osteocytic canalicular networks and decreased the number of live osteocytes. Furthermore, Sod2 deficiency significantly suppressed bone formation and increased bone resorption concomitant with the upregulation of sclerostin and receptor activator of NF-κB ligand (RANKL). In vitro experiments also revealed that treatment with paraquat, a superoxide inducer in mitochondria, promoted the RANKL expression via, in part, ERK phosphorylation. These findings demonstrate that the mitochondrial superoxide induced in osteocytes by Sod2 ablation causes age-related bone loss due to the impairment of canalicular networks and bone metabolism via the deregulation of the sclerostin and RANKL expression.
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Affiliation(s)
- Keiji Kobayashi
- 1] Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan [2] Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoshitomo Saita
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Daichi Morikawa
- 1] Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan [2] Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yusuke Ozawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kenji Watanabe
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Masato Koike
- 1] Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan [2] Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoshinori Asou
- Department of Orthopedic Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takuji Shirasawa
- Department of Aging Control Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Koutaro Yokote
- Department of Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kazuo Kaneko
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takahiko Shimizu
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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Watanabe K, Shibuya S, Ozawa Y, Nojiri H, Izuo N, Yokote K, Shimizu T. Superoxide dismutase 1 loss disturbs intracellular redox signaling, resulting in global age-related pathological changes. Biomed Res Int 2014; 2014:140165. [PMID: 25276767 PMCID: PMC4170698 DOI: 10.1155/2014/140165] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 07/29/2014] [Accepted: 08/06/2014] [Indexed: 01/14/2023]
Abstract
Aging is characterized by increased oxidative stress, chronic inflammation, and organ dysfunction, which occur in a progressive and irreversible manner. Superoxide dismutase (SOD) serves as a major antioxidant and neutralizes superoxide radicals throughout the body. In vivo studies have demonstrated that copper/zinc superoxide dismutase-deficient (Sod1(-/-)) mice show various aging-like pathologies, accompanied by augmentation of oxidative damage in organs. We found that antioxidant treatment significantly attenuated the age-related tissue changes and oxidative damage-associated p53 upregulation in Sod1(-/-) mice. This review will focus on various age-related pathologies caused by the loss of Sod1 and will discuss the molecular mechanisms underlying the pathogenesis in Sod1(-/-) mice.
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Affiliation(s)
- Kenji Watanabe
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
- Department of Clinical Cell Biology and Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Shuichi Shibuya
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Yusuke Ozawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Naotaka Izuo
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Koutaro Yokote
- Department of Clinical Cell Biology and Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Takahiko Shimizu
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
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Morikawa D, Itoigawa Y, Nojiri H, Sano H, Itoi E, Saijo Y, Kaneko K, Shimizu T. Contribution of oxidative stress to the degeneration of rotator cuff entheses. J Shoulder Elbow Surg 2014; 23:628-35. [PMID: 24745312 DOI: 10.1016/j.jse.2014.01.041] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [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: 09/03/2013] [Revised: 01/23/2014] [Accepted: 01/27/2014] [Indexed: 02/01/2023]
Abstract
BACKGROUND Rotator cuff degeneration is one of the multiple factors that lead to rotator cuff tears; however, the precise mechanism of such degeneration still remains unclear. In this study, we investigated the supraspinatus tendon enthesis to clarify the link between rotator cuff degeneration and oxidative stress in antioxidant enzyme superoxide dismutase 1 (Sod1)-deficient mice (Sod1(-/-)). METHODS The supraspinatus tendon and humeral head were isolated and fixed to prepare histologic sections from wild-type and Sod1(-/-) male mice at 20 weeks of age. Hematoxylin-eosin staining was performed to assess the histomorphologic structure. To investigate the collagen fibers, we examined spatially aligned collagen fibers using a polarizing microscope and assessed the amount of collagen using immunohistochemical staining. To analyze the tissue elasticity, we measured the tissue acoustic properties using scanning acoustic microscopy. RESULTS The Sod1(-/-) mice showed histologic changes, such as a misaligned 4-layered structure and fragmented tidemark, in the enthesis. Sod1 loss also decreased the amount of brightly diffracted light and type I collagen, indicating collagen downregulation. The scanning acoustic microscopy analysis showed that the speed and attenuation of sound were increased in the nonmineralized fibrocartilage of the Sod1(-/-) mice, suggesting decreased mechanical properties in the supraspinatus enthesis. CONCLUSION Sod1 deficiency-induced degeneration is associated with impaired elasticity in the supraspinatus tendon enthesis, recapitulating human rotator cuff degeneration. These results suggest that intracellular oxidative stress contributes to the degeneration of rotator cuff entheses.
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Affiliation(s)
- Daichi Morikawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan; Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoshiaki Itoigawa
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hirotaka Sano
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Eiji Itoi
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoshifumi Saijo
- Department of Biomedical Imaging, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan
| | - Kazuo Kaneko
- Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takahiko Shimizu
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
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45
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Salam LB, Ilori MO, Amund OO, Numata M, Horisaki T, Nojiri H. Carbazole angular dioxygenation and mineralization by bacteria isolated from hydrocarbon-contaminated tropical African soil. Environ Sci Pollut Res Int 2014; 21:9311-9324. [PMID: 24728574 DOI: 10.1007/s11356-014-2855-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 03/31/2014] [Indexed: 06/03/2023]
Abstract
Four bacterial strains isolated from hydrocarbon-contaminated soils in Lagos, Nigeria, displayed extensive degradation abilities on carbazole, an N-heterocyclic aromatic hydrocarbon. Physicochemical analyses of the sampling sites (ACPP, MWO, NESU) indicate gross pollution of the soils with a high hydrocarbon content (157,067.9 mg/kg) and presence of heavy metals. Phylogenetic analysis of the four strains indicated that they were identified as Achromobacter sp. strain SL1, Pseudomonas sp. strain SL4, Microbacterium esteraromaticum strain SL6, and Stenotrophomonas maltophilia strain BA. The rates of degradation of carbazole by the four isolates during 30 days of incubation were 0.057, 0.062, 0.036, and 0.050 mg L(-1) h(-1) for strains SL1, SL4, SL6, and BA. Gas chromatographic (GC) analyses of residual carbazole after 30 days of incubation revealed that 81.3, 85, 64.4, and 76 % of 50 mg l(-1) carbazole were degraded by strains SL1, SL4, SL6, and BA, respectively. GC-mass spectrometry and high-performance liquid chromatographic analyses of the extracts from the growing and resting cells of strains SL1, SL4, and SL6 cultured on carbazole showed detection of anthranilic acid and catechol while these metabolites were not detected in strain BA under the same conditions. This study has established for the first time carbazole angular dioxygenation and mineralization by isolates from African environment.
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Affiliation(s)
- L B Salam
- Department of Microbiology, University of Lagos, Akoka, Lagos, Nigeria,
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46
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Morikawa D, Nojiri H, Saita Y, Kobayashi K, Watanabe K, Ozawa Y, Koike M, Asou Y, Takaku T, Kaneko K, Shimizu T. Cytoplasmic reactive oxygen species and SOD1 regulate bone mass during mechanical unloading. J Bone Miner Res 2013; 28:2368-80. [PMID: 23674366 DOI: 10.1002/jbmr.1981] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [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: 11/22/2012] [Revised: 04/02/2013] [Accepted: 05/02/2013] [Indexed: 11/09/2022]
Abstract
Oxidative stress contributes to the pathogenesis of age-related diseases as well as bone fragility. Our previous study demonstrated that copper/zinc superoxide dismutase (Sod1)-deficient mice exhibit the induction of intracellular reactive oxygen species (ROS) and bone fragility resulting from low-turnover bone loss and impaired collagen cross-linking (Nojiri et al. J Bone Miner Res. 2011;26:2682-94). Mechanical stress also plays an important role in the maintenance of homeostasis in bone tissue. However, the molecular links between oxidative and mechanical stresses in bone tissue have not been fully elucidated. We herein report that mechanical unloading significantly increased intracellular ROS production and the specific upregulation of Sod1 in bone tissue in a tail-suspension experiment. We also reveal that Sod1 loss exacerbated bone loss via reduced osteoblastic abilities during mechanical unloading. Interestingly, we found that the administration of an antioxidant, vitamin C, significantly attenuated bone loss during unloading. These results indicate that mechanical unloading, in part, regulates bone mass via intracellular ROS generation and the Sod1 expression, suggesting that activating Sod1 may be a preventive strategy for ameliorating mechanical unloading-induced bone loss.
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Affiliation(s)
- Daichi Morikawa
- Department of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan; Department of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan
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47
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Kuwahara K, Yoshii S, Nojiri H, Aoki D, Knafo W, Duc F, Fabrèges X, Scheerer GW, Frings P, Rikken GLJA, Bourdarot F, Regnault LP, Flouquet J. Magnetic structure of phase II in U(Ru(0.96)Rh(0.04))2Si2 determined by neutron diffraction under pulsed high magnetic fields. Phys Rev Lett 2013; 110:216406. [PMID: 23745903 DOI: 10.1103/physrevlett.110.216406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 04/23/2013] [Indexed: 06/02/2023]
Abstract
We report neutron diffraction measurements on U(Ru(0.96)Rh(0.04))(2)Si(2) single crystal under pulsed high magnetic fields up to 30 T applied along the tetragonal c axis. The high-field experiments revealed that the field-induced phase II above 26 T corresponds to a commensurate up-up-down ferrimagnetic structure characterized by the wave vector q=(2/3,0,0) with the magnetic moments parallel to the c axis, which naturally explains the one-third magnetization plateau and the substantially changed Fermi surface in phase II. This a-axis modulated magnetic structure indicates that the phase II near the hidden order phase is closely related to the characteristic incommensurate magnetic fluctuations at Q(1)=(0.6,0,0) in the pure system URu(2)Si(2), in contrast to the pressure-induced antiferromagnetic order at Q(0)=(1,0,0).
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Affiliation(s)
- K Kuwahara
- Institute of Applied Beam Science, Ibaraki University, Mito 310-8512, Japan
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48
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Tomkowicz Z, Rams M, Bałanda M, Foro S, Nojiri H, Krupskaya Y, Kataev V, Büchner B, Nayak SK, Yakhmi JV, Haase W. Slow Magnetic Relaxations in Manganese(III) Tetra(meta-fluorophenyl)porphyrin-tetracyanoethenide. Comparison with the Relative Single Chain Magnet ortho Compound. Inorg Chem 2012; 51:9983-94. [DOI: 10.1021/ic3014927] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Z. Tomkowicz
- Institute of Physics, Jagiellonian University,
Reymonta 4, 30-059 Kraków, Poland
| | - M. Rams
- Institute of Physics, Jagiellonian University,
Reymonta 4, 30-059 Kraków, Poland
| | - M. Bałanda
- H. Niewodniczański Institute of Nuclear Physics
PAN, Radzikowskiego 152, 31-342 Kraków, Poland
| | - S. Foro
- Clemens-Schöpf-Institut für Organische
Chemie und Biochemie, Technische Universität Darmstadt, Petersenstrasse
22, D-64287 Darmstadt, Germany
| | - H. Nojiri
- Institute for Materials Research, Tohoku University, Katahira 2-1-1,
Sendai 980-8577, Japan
| | - Y. Krupskaya
- Institute for Solid State Physics, IFW Dresden, Helmholtzstrasse
20, D-01069 Dresden, Germany
| | - V. Kataev
- Institute for Solid State Physics, IFW Dresden, Helmholtzstrasse
20, D-01069 Dresden, Germany
| | - B. Büchner
- Institute for Solid State Physics, IFW Dresden, Helmholtzstrasse
20, D-01069 Dresden, Germany
| | - S. K. Nayak
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie, Technische Universität
Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
| | - J. V. Yakhmi
- Technical Physics & Prototype Engineering Division, Bhabha Atomic Research Centre, Mumbai -400 085, India
| | - W. Haase
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie, Technische Universität
Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany
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49
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Ruff JPC, Chu JH, Kuo HH, Das RK, Nojiri H, Fisher IR, Islam Z. Susceptibility anisotropy in an iron arsenide superconductor revealed by x-ray diffraction in pulsed magnetic fields. Phys Rev Lett 2012; 109:027004. [PMID: 23030198 DOI: 10.1103/physrevlett.109.027004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Indexed: 06/01/2023]
Abstract
In addition to unconventional high-T(c) superconductivity, the iron arsenides exhibit strong magnetoelastic coupling and a notable electronic anisotropy within the a-b plane. We relate these properties by studying underdoped Ba(Fe(1-x)Co(x))2As2 by x-ray diffraction in pulsed magnetic fields up to 27.5 T. We exploit magnetic detwinning effects to demonstrate anisotropy in the in-plane susceptibility, which develops at the structural phase transition despite the absence of magnetic order. The degree of detwinning increases smoothly with decreasing temperature, and a single-domain condition is realized over a range of field and temperature. At low temperatures we observe an activated behavior, with a large hysteretic remnant effect. Detwinning was not observed within the superconducting phase for accessible magnetic fields.
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Affiliation(s)
- J P C Ruff
- The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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50
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Choi KY, Wang Z, Nojiri H, van Tol J, Kumar P, Lemmens P, Bassil BS, Kortz U, Dalal NS. Coherent manipulation of electron spins in the {Cu3} spin triangle complex impregnated in nanoporous silicon. Phys Rev Lett 2012; 108:067206. [PMID: 22401119 DOI: 10.1103/physrevlett.108.067206] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 11/03/2011] [Indexed: 05/24/2023]
Abstract
We report on coherent manipulation of electron spins in an antiferromagnetically coupled spin triangle {Cu3-X} (X=As, Sb) impregnated in freestanding nanoporous silicon (NS) by using 240 GHz microwave pulses. Rabi oscillations are observed and the spin coherence time is found to be T(2)=1066 ns at 1.5 K. This demonstrates that the {Cu3-X}:NS hybrid material provides a promising scheme for implementing spin-based quantum gates. By measuring the spin relaxation times of samples with different symmetries and environments we give evidence that a spin chirality is the main decoherence source of spin triangle molecules.
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Affiliation(s)
- K-Y Choi
- Department of Physics, Chung-Ang University, Seoul, Republic of Korea.
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