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Bae WC, Statum S, Masuda K, Chung CB. T1rho MR properties of human patellar cartilage: correlation with indentation stiffness and biochemical contents. Skeletal Radiol 2024; 53:649-656. [PMID: 37740079 DOI: 10.1007/s00256-023-04458-6] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 09/06/2023] [Accepted: 09/15/2023] [Indexed: 09/24/2023]
Abstract
OBJECTIVE Cartilage degeneration involves structural, compositional, and biomechanical alterations that may be detected non-invasively using quantitative MRI. The goal of this study was to determine if topographical variation in T1rho values correlates with indentation stiffness and biochemical contents of human patellar cartilage. DESIGN Cadaveric patellae from unilateral knees of 5 donors with moderate degeneration were imaged at 3-Telsa with spiral chopped magnetization preparation T1rho sequence. Indentation testing was performed, followed by biochemical analyses to determine water and sulfated glycosaminoglycan contents. T1rho values were compared to indentation stiffness, using semi-circular regions of interest (ROIs) of varying sizes at each indentation site. ROIs matching the resected tissues were analyzed, and univariate and multivariate regression analyses were performed to compare T1rho values to biochemical contents. RESULTS Grossly, superficial degenerative change of the cartilage (i.e., roughened texture and erosion) corresponded with regions of high T1rho values. High T1rho values correlated with low indentation stiffness, and the strength of correlation varied slightly with the ROI size. Spatial variations in T1rho values correlated positively with that of the water content (R2 = 0.10, p < 0.05) and negatively with the variations in the GAG content (R2 = 0.13, p < 0.01). Multivariate correlation (R2 = 0.23, p < 0.01) was stronger than either of the univariate correlations. CONCLUSION These results demonstrate the sensitivity of T1rho values to spatially varying function and composition of cartilage and that the strength of correlation depends on the method of data analysis and consideration of multiple variables.
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Affiliation(s)
- Won C Bae
- Department of Radiology, University of California-San Diego, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA.
- VA San Diego Healthcare System, 3350 La Jolla Village Drive MC-114, San Diego, CA, 92161, USA.
| | - Sheronda Statum
- Department of Radiology, University of California-San Diego, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA
- VA San Diego Healthcare System, 3350 La Jolla Village Drive MC-114, San Diego, CA, 92161, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0863, USA
| | - Christine B Chung
- Department of Radiology, University of California-San Diego, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA
- VA San Diego Healthcare System, 3350 La Jolla Village Drive MC-114, San Diego, CA, 92161, USA
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Farkas MR, Dorn S, Muller L, Singh VP, Sepulveda YJ, Suhandynata RT, Momper JD, Masuda K, Richter PJ. Pharmacokinetics, Fecal Output, and Grimace Scores in Rabbits Given Long-acting Buprenorphine or Fentanyl for Postsurgical Analgesia. J Am Assoc Lab Anim Sci 2024. [PMID: 38490726 DOI: 10.30802/aalas-jaalas-23-000074] [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] [Indexed: 03/17/2024]
Abstract
The New Zealand white rabbit (Oryctolagus cuniculus) is a frequently used surgical model. Pain management after surgery is a critical aspect of animal welfare. Recently, a long-acting buprenorphine formulation (Ethiqa XR; EXR) was approved for use in rats and mice but has not yet been investigated in rabbits. The current study aimed to determine whether a single subcutaneous dose of 0.15 mg/kg of EXR could achieve and maintain therapeutic buprenorphine plasma concentrations (0.1 ng/mL) for 72 h in male and female rabbits. We also evaluated the safety profiles of EXR and the fentanyl patch (FP) by assessing fecal output after surgery, because opioids are known to decrease intestinal motility. Behavior and pain scores were compared for rabbits that received either EXR or the FP after undergoing an annulus puncture procedure to induce osteoarthritis. EXR at 0.15 mg/kg SC provided a shorter time to onset and sustained analgesia for 72 h in male and female rabbits, whereas the FP provided suboptimal analgesia after 48 h. Both EXR and FP reduced fecal output after surgery. Output returned to baseline levels within 72 h for the EXR group and remained slightly below baseline at 96 h after surgery for the fentanyl group. Grimace pain scores revealed no significant difference between treatment groups. These results suggest that EXR is a safe and effective option for postoperative pain management in rabbits.
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Affiliation(s)
- Michelle R Farkas
- Animal Care Program, University of California San Diego, La Jolla, California
| | - Shanelle Dorn
- Animal Care Program, University of California San Diego, La Jolla, California
| | - Liam Muller
- Department of Molecular Biology, University of San Diego, La Jolla, California
| | - Vikram Pal Singh
- Department of Psychology, University of California San Diego, La Jolla, California
| | - Yadira J Sepulveda
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California
| | - Raymond T Suhandynata
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California
- Department of Pathology, University of San Diego, La Jolla, California; and
| | - Jeremiah D Momper
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California San Diego, La Jolla, California
| | - Philip J Richter
- Animal Care Program, University of California San Diego, La Jolla, California
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Nemoto H, Sakai D, Watson D, Masuda K. Nuclear Factor-κB Decoy Oligodeoxynucleotide Attenuates Cartilage Resorption In Vitro. Bioengineering (Basel) 2024; 11:46. [PMID: 38247922 PMCID: PMC10813736 DOI: 10.3390/bioengineering11010046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND Cartilage harvest and transplantation is a common surgery using costal, auricular, and septal cartilage for craniofacial reconstruction. However, absorption and warping of the cartilage grafts can occur due to inflammatory factors associated with wound healing. Transcription factor nuclear factor-κB (NF-κB) is activated by the various stimulation such as interleukin-1 (IL-1), and plays a central role in the transactivation of this inflammatory cytokine gene. Inhibition of NF-κB may have anti-inflammatory effects. The aim of this study was to explore the potential of an NF-κB decoy oligodeoxynucleotide (Decoy) as a chondroprotective agent. MATERIALS AND METHODS Safe and efficacious concentrations of Decoy were assessed using rabbit nasal septal chondrocytes (rNSChs) and assays for cytotoxicity, proteoglycan (PG) synthesis, and PG turnover were carried out. The efficacious concentration of Decoy determined from the rNSChs was then applied to human nasal septal cartilage (hNSC) in vitro and analyzed for PG turnover, the levels of inflammatory markers, and catabolic enzymes in explant-conditioned culture medium. RESULTS Over the range of Decoy conditions and concentrations, no inhibition of PG synthesis or cytotoxicity was observed. Decoy at 10 μM effectively inhibited PG degradation in the hNSC explant, prolonging PG half-life by 63% and decreasing matrix metalloprotease 3 (MMP-3) by 70.7% (p = 0.027). CONCLUSIONS Decoy may be considered a novel chondroprotective therapeutic agent in cartilage transplantation due to its ability to inhibit cartilage degradation due to inflammation cytokines.
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Affiliation(s)
- Hitoshi Nemoto
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA
- Department of Plastic Surgery, School of Medicine, Tokai University, Isehara 259-1193, Kanagawa, Japan
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA; (D.S.); (K.M.)
- Department of Orthopaedic Surgery, School of Medicine, Tokai University, Isehara 259-1193, Kanagawa, Japan
| | - Deborah Watson
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA; (D.S.); (K.M.)
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Hoshina M, Noguchi M, Sekihara H, Masuda K, Shinmura M, Sugahara S. Chest Wall to Heart Distance Reproducibility in Postoperative Deep Inspiration Breath-Hold Radiotherapy for Left-Sided Breast Cancer Using an Anzai Laser Sensor With Visual Feedback. Cureus 2024; 16:e53183. [PMID: 38420106 PMCID: PMC10901638 DOI: 10.7759/cureus.53183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2024] [Indexed: 03/02/2024] Open
Abstract
Background Left-sided breast cancer radiotherapy may increase the risk of cardiovascular death due to possible heart irradiation. The reproducibility of the chest wall to heart distance in deep inspiration breath-hold (DIBH) was studied using a laser sensor with visual feedback. Methodology A total of 10 consecutive postoperative left-sided breast cancer cases receiving DIBH radiotherapy between December 2022 and September 2023 were retrospectively investigated. The prescribed dose was 50 Gy in 25 fractions. An Anzai respiratory gating system, AZ-733VI (Anzai, Tokyo, Japan), was employed that has a laser displacement sensor and a visual feedback device. An Elekta linac with a cone-beam CT unit, Axesse (Elekta AB, Stockholm, Sweden), was used in this study. The interfractional changes in the chest wall to heart distance among 25 fractions were analyzed for each of the 10 patients in each coordinate axis. In addition, the median with the 95% confidence interval (CI) and interquartile range (IQR) for all 250 fractions were calculated in each axis to assess the reproducibility of our DIBH technique. Results The medians of the interfractional changes in the chest wall to heart distance in each of the 10 patients ranged from -2 mm to 3 mm, -1 mm to 3 mm, and -2 mm to 1 mm in the lateral (X), superior-inferior (Y), and anterior-posterior (Z) directions, respectively. For all 10 cases, the medians were 1 mm (95% CI = 0.72 to 1.28 mm) in X, 1 mm (95% CI = 0.76 to 1.24 mm) in Y, and 0 mm (95% CI = -0.20 to 0.20 mm) in Z directions, whereas the IQRs were 4 mm in X, 2 mm in Y and 2 mm in Z directions. The measured IQRs were two to three times smaller than those shown in a previous report without visual feedback, suggesting a clinical advantage of the visual feedback in DIBH for left-sided breast cancer radiotherapy. The DIBH solution shown in this study required approximately 10 minutes from room-in to room-out, thereby not reducing the daily number of patients. Conclusions Our DIBH approach with visual feedback achieved better distance reproducibility between the chest wall and heart by a factor of two to three in terms of IQR compared to the previously reported data without visual feedback. Patient throughput was also favorable. To our knowledge, this is the first report demonstrating the chest wall to heart distance reproducibility in DIBH with visual feedback.
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Affiliation(s)
- Masataka Hoshina
- Radiology and Radiation Oncology, Tokyo Medical University Ibaraki Medical Center, Inashiki-gun, JPN
| | - Masaya Noguchi
- Radiology and Radiation Oncology, Tokyo Medical University Ibaraki Medical Center, Inashiki-gun, JPN
| | - Hirotoshi Sekihara
- Radiology and Radiation Oncology, Tokyo Medical University Ibaraki Medical Center, Inashiki-gun, JPN
| | - Koichi Masuda
- Radiology and Radiation Oncology, Tokyo Medical University Ibaraki Medical Center, Inashiki-gun, JPN
| | - Mitsuko Shinmura
- Nursing, Tokyo Medical University Ibaraki Medical Center, Inashiki-gun, JPN
| | - Shinji Sugahara
- Radiology and Radiation Oncology, Tokyo Medical University Ibaraki Medical Center, Inashiki-gun, JPN
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Nozawa Y, Masuda K, Arahata K, Kobashi Y, Ikeda K, Suzuki T. Percutaneous trans-bladder drainage of a pelvic abscess caused by sigmoid diverticulitis: Two case reports. Radiol Case Rep 2023; 18:3675-3679. [PMID: 37601118 PMCID: PMC10432259 DOI: 10.1016/j.radcr.2023.07.059] [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: 02/28/2023] [Revised: 06/19/2023] [Accepted: 07/23/2023] [Indexed: 08/22/2023] Open
Abstract
Sigmoid diverticulitis can potentially lead to the development of pelvic abscesses. Mortality rate from intra-abdominal abscesses is as high as 35%, and patients with diverticulitis complicated by an abscess are at a high risk of recurrent diverticulitis. Recently, image-guided drainage has been performed using computed tomography or ultrasonography for the treatment of pelvic abscesses. Standard radiological pelvic abscess image-guided drainage methods consist of transabdominal, transgluteal, or cranio-caudal puncture approaches. However, these standard approaches have technical limitations due to intrapelvic organ structures. Therefore, we performed image-guided drainage using a percutaneous trans-bladder approach with a simpler 1-step puncture method and a less invasive 7-Fr drainage catheter in 2 cases of a 72-year-old female and a 53-year-old female with relapsed pelvic abscesses complicated by sigmoid diverticulitis due to difficulties involving the standard approach. The abscesses in both cases disappeared on follow-up computed tomography scans, demonstrating no pelvic abscess recurrence. Our results showed that trans-bladder image-guided drainage is an effective alternative method for treating pelvic abscesses.
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Affiliation(s)
- Yosuke Nozawa
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13 Sugano, Ichikawa-shi, Chiba 272-8513, Japan
| | - Koichi Masuda
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13 Sugano, Ichikawa-shi, Chiba 272-8513, Japan
| | - Kyoko Arahata
- Department of Gastroenterology, Tokyo Dental College Ichikawa General Hospital, Ichikawa-shi, Chiba, Japan
| | - Yuko Kobashi
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13 Sugano, Ichikawa-shi, Chiba 272-8513, Japan
| | - Koshi Ikeda
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13 Sugano, Ichikawa-shi, Chiba 272-8513, Japan
| | - Taiga Suzuki
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13 Sugano, Ichikawa-shi, Chiba 272-8513, Japan
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Kakutani K, Yurube T, An HS, Doita M, Masuda K. Cytokine Inhibitors Upregulate Extracellular Matrix Anabolism of Human Intervertebral Discs under Alginate Beads and Alginate-Embedded Explant Cultures. Int J Mol Sci 2023; 24:12336. [PMID: 37569715 PMCID: PMC10418414 DOI: 10.3390/ijms241512336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
We investigated the effects of the cytokine inhibitors IL-1 receptor antagonist (IL-1Ra) and soluble tumor necrosis factor receptor-1 (sTNFR1) on the extracellular matrix metabolism of human intervertebral discs (IVDs) and the roles of IL-1β and TNF in the homeostasis of IVD cells. The 1.2% alginate beads and the explants obtained from 35 human lumbar discs were treated with cytokine inhibitors. Extracellular matrix metabolism was evaluated by proteoglycan (PG) and collagen syntheses and IL-1β, TNF, and IL-6 expressions after three days of culture in the presence or absence of IL-1Ra, sTNFR1, and cycloheximide. Simultaneous treatment with IL-1Ra and sTNFR1 stimulated PG and collagen syntheses in the NP and AF cells and explants. The IL-1β concentration was significantly correlated to the relative increase in PG synthesis in AF explants after simultaneous cytokine inhibitor treatment. The relative increase in PG synthesis induced by simultaneous cytokine treatment was significantly higher in an advanced grade of MRI. Expressions of IL-1β and TNF were upregulated by each cytokine inhibitor, and simultaneous treatment suppressed IL-1β and TNF productions. In conclusion, IL-1Ra and sTNFR1 have the potential to increase PG and collagen synthesis in IVDs. IL-1β and TNF have a feedback pathway to maintain optimal expression, resulting in the control of homeostasis in IVD explants.
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Affiliation(s)
- Kenichiro Kakutani
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan;
- Department of Orthopaedic Surgery, Rush University Medical Center, Orthopaedic Building, Suite 300, 1611 W Harrison Street, Chicago, IL 60612, USA;
| | - Takashi Yurube
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan;
| | - Howard S. An
- Department of Orthopaedic Surgery, Rush University Medical Center, Orthopaedic Building, Suite 300, 1611 W Harrison Street, Chicago, IL 60612, USA;
| | - Minoru Doita
- Department of Orthopedic Surgery, Iwate Medical University School of Medicine, 2-1-1, Idaidori, Yahaba-cho, Showa-gun, Iwate 028-3895, Japan;
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California, San Diego, 9500 Gilman Dr. Mail Code 0863, La Jolla, CA 92093-0863, USA;
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Tamura K, Yoshida T, Masuda K, Matsumoto Y, Shinno Y, Okuma Y, Goto Y, Horinouchi H, Yamamoto N, Ohe Y. Comparison of clinical outcomes of osimertinib and first-generation EGFR-tyrosine kinase inhibitors (TKIs) in TKI-untreated EGFR-mutated non-small-cell lung cancer with leptomeningeal metastases. ESMO Open 2023; 8:101594. [PMID: 37517364 PMCID: PMC10485398 DOI: 10.1016/j.esmoop.2023.101594] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 04/22/2023] [Accepted: 06/07/2023] [Indexed: 08/01/2023] Open
Abstract
BACKGROUND Leptomeningeal metastases (LM) are devastating complications of epidermal growth factor receptor (EGFR)-mutated non-small-cell lung cancer (NSCLC). Although osimertinib, a third-generation EGFR-tyrosine kinase inhibitor (TKI), has better penetration into the central nervous system than first-generation EGFR-TKIs, data on the distinct activity of EGFR-TKIs in untreated advanced EGFR-mutated NSCLC with LM are lacking. PATIENTS AND METHODS We retrospectively reviewed patients treated with EGFR-TKIs for TKI-untreated common EGFR-mutated NSCLC with LM between July 2002 and July 2021 at the National Cancer Center Hospital. The patients were divided into two groups: patients treated with osimertinib (Osi group) and those treated with gefitinib or erlotinib [first-generation (1G)-TKI group]. RESULTS Of the 967 patients, 71 were eligible, including 29 in the Osi group and 42 in the 1G-TKI group. The median progression-free survival (PFS) and overall survival (OS) in the Osi group were better than those in the 1G-TKI group (PFS: 16.9 months versus 8.6 months, P = 0.007, and OS: 26.6 months versus 20.0 months, P = 0.158). The LM-overall response rate (ORR) and LM-PFS were significantly better in the Osi group than in the 1G-TKI group (LM-ORR: 62.5% versus 25.7%, P = 0.007; LM-PFS: 23.4 months versus 12.1 months, P = 0.021). In the subgroup analysis of EGFR mutation status, LM-PFS for patients with exon 19 deletion was significantly longer in the Osi group than in the 1G-TKI group (32.7 months versus 13.4 months, P = 0.013), whereas those with L858R mutation in exon 21 did not differ between the two groups. In the multivariate analysis, osimertinib and exon 19 deletion were significant factors for better LM-PFS and OS. CONCLUSION Osimertinib can be more effective for untreated common EGFR-mutated NSCLC patients with LM, especially those with exon 19 deletion, compared to first-generation TKIs.
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Affiliation(s)
- K Tamura
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo; Division of Respiratory Diseases, Department of Internal Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo
| | - T Yoshida
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo; Department of Experimental Therapeutics, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan.
| | - K Masuda
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
| | - Y Matsumoto
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
| | - Y Shinno
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
| | - Y Okuma
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
| | - Y Goto
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
| | - H Horinouchi
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
| | - N Yamamoto
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo; Department of Experimental Therapeutics, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - Y Ohe
- Department of Thoracic Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo
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Finkenstaedt T, Siriwananrangsun P, Masuda K, Bydder GM, Chen KC, Bae WC. Ultrashort time-to-echo MR morphology of cartilaginous endplate correlates with disc degeneration in the lumbar spine. Eur Spine J 2023; 32:2358-2367. [PMID: 37195362 DOI: 10.1007/s00586-023-07739-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 03/15/2023] [Accepted: 04/22/2023] [Indexed: 05/18/2023]
Abstract
PURPOSE Using ultrashort echo time (UTE) MRI, we determined prevalence of abnormal cartilaginous endplate (CEP), and the relationship between CEP and disc degeneration in human lumbar spines. MATERIALS AND METHODS Lumbar spines from 71 cadavers (age 14-74 years) were imaged at 3 T using sagittal UTE and spin echo T2 map sequences. On UTE images, CEP morphology was defined as "normal" with linear high signal intensity or "abnormal" with focal signal loss and/or irregularity. On spin echo images, disc grade and T2 values of the nucleus pulposus (NP) and annulus fibrosus (AF) were determined. 547 CEPs and 284 discs were analysed. Effects of age, sex, and level on CEP morphology, disc grade, and T2 values were determined. Effects of CEP abnormality on disc grade, T2 of NP, and T2 of AF were also determined. RESULTS Overall prevalence of CEP abnormality was 33% and it tended to increase with older ages (p = 0.08) and at lower spinal levels of L5 than L2 or L3 (p = 0.001). Disc grades were higher and T2 values of the NP were lower in older spines (p < 0.001) and at lower disc level of L4-5 (p < 0.05). We found significant association between CEP and disc degeneration; discs adjacent to abnormal CEPs had high grades (p < 0.01) and lower T2 values of the NP (p < 0.05). CONCLUSION These results suggest that abnormal CEPs are frequently found, and it associates significantly with disc degeneration, suggesting an insight into pathoetiology of disc degeneration.
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Affiliation(s)
- Tim Finkenstaedt
- Department of Radiology, University of California, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Palanan Siriwananrangsun
- Department of Radiology, University of California, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA
- Department of Radiology, Siriraj Hospital, Bangkok, Thailand
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Graeme M Bydder
- Department of Radiology, University of California, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA
| | - Karen C Chen
- Department of Radiology, VA San Diego Healthcare System, San Diego, CA, USA
| | - Won C Bae
- Department of Radiology, University of California, 9427 Health Sciences Drive, La Jolla, CA, 92093-0997, USA.
- Department of Radiology, VA San Diego Healthcare System, San Diego, CA, USA.
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9
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Kawasaki H, Masuda K, Isayama J, Aoto Y, Obata S, Fukushima-Nomura A, Ito Y, Tanase K, Kawakami E, Amagai M. 077 The thirteen bacterial species inversely correlated with disease activities of atopic dermatitis in human showed a biotherapeutic potential based on their suppressive effects in mice. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Nozawa Y, Ymazoe S, Masuda K, Takigawa Y, Kobashi Y, Ikeda K, Fukuda T, Michimoto K. Efficacy and safety of endovascular therapy for delayed hepatic artery post-pancreatectomy hemorrhage: development of extrahepatic collateral circulation and complications of post endovascular therapy. CVIR Endovasc 2022; 5:47. [PMID: 36063252 PMCID: PMC9445144 DOI: 10.1186/s42155-022-00326-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/31/2022] [Indexed: 11/12/2022] Open
Abstract
Background Endovascular therapy (ET) for delayed hepatic artery post-pancreatectomy hemorrhage (HA-PPH) may require complete hepatic artery occlusion (HAO). Nonetheless, the development of extrahepatic collateral circulation (EHC) and the relationship between radiological factors (EHC, portal vein stenosis, and HAO) and adverse hepatic events after ET remain unclear. This study aimed to evaluate the efficacy and safety of ET for delayed PPH and examine the development of EHC. Methods A total of 19 ET cases for delayed HA-PPH were reviewed. Hepatic adverse events, portal vein stenosis, HAO, and mortality rate after ET were evaluated. Moreover, EHC from the left gastric artery (LGA), right inferior phrenic artery (RIPA), left inferior phrenic artery (LIPA), right internal thoracic artery (RITA), left internal thoracic artery (LITA), renal artery (RA), omental artery (OA), intercostal artery (IA), and branch of superior mesenteric artery (BSMA) was assessed using angiogram and computed tomography angiography (CTA). Results All cases were successfully treated using transcatheter arterial embolization (n = 17) and stent-graft placement (n = 2) without mortality. EHC from the LGA (8/19), RIPA (10/19), LIPA (4/19), and RITA (3/19) was observed on post-ET CTA. The incidence of hepatic adverse events was significant in the group with both HAO and portal vein stenosis (p < 0.001) and absence of EHC from LIPA and RITA (p < 0.05). Conclusion ET for delayed HA-PPH might be effective and safe. While avoiding both HAO and portal vein stenosis is important, the development of EHCs from LIPA and RITA may prevent hepatic adverse events after ET.
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Shirasawa M, Yoshida T, Shiraishi K, Takigami A, Takayanagi D, Imabayashi T, Matsumoto Y, Masuda K, Shinno Y, Okuma Y, Goto Y, Horinouchi H, Tsuchida T, Hamamoto R, Yamamoto N, Motoi N, Watanabe SI, Ohe Y. 1548P Identification of inflamed-phenotype of small cell lung cancer leading to the efficacy of anti-PD-L1 antibody and chemotherapy. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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12
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Uematsu M, Goto Y, Torasawa M, Matsumoto Y, Masuda K, Shinno Y, Okuma Y, Yoshida T, Horinouchi H, Yamamoto N, Ohe Y. EP07.03-004 Efficacy of Thoracic Radiotherapy for Local Progression in Advanced Thymic Carcinoma. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Tanabe Y, Shukuya T, Nagata Y, Watanabe T, Seto K, Takahashi R, Masuda K, Miura K, Tajima K, Hiki M, Hayashi T, Suzuki K, Takahashi K. Successful restart of chemotherapy in a patient with primary mediastinal nonseminomatous germ cell tumor after COVID-19 infection. Thorac Cancer 2022; 13:2654-2658. [PMID: 35903864 PMCID: PMC9353416 DOI: 10.1111/1759-7714.14593] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/05/2022] [Accepted: 07/08/2022] [Indexed: 01/08/2023] Open
Abstract
Cancer patients are considered highly susceptible to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. However, it is not well known when chemotherapy can be safely restarted in cancer patients after coronavirus disease 2019 (COVID-19). Here, we describe the case of an 18-year-old man diagnosed with primary mediastinal nonseminomatous germ cell tumor (PMNSGCT) in which chemotherapy could be safely restarted after COVID-19. On day 11 of the third cycle of bleomycin, etoposide, plus cisplatin (BEP), he was diagnosed with mild COVID-19. On day 16 after the onset of COVID-19 (day 26 of third cycle of BEP), chemotherapy for his PMNSGCT was restarted. He received surgery after the fourth cycle of BEP without recurrence of COVID-19. Chemotherapy could be restarted and followed by surgery in this post-COVID-19 patient who had experienced mild illness after the discharge criteria were met and all symptoms had disappeared. We report this case with a review of the literature on restarting chemotherapy after SARS-CoV2 infection.
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Affiliation(s)
- Yuki Tanabe
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Takehito Shukuya
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Yuichi Nagata
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Takayasu Watanabe
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Koichi Seto
- Clinical training center, Juntendo University Hospital, Tokyo, Japan
| | - Rina Takahashi
- Clinical training center, Juntendo University Hospital, Tokyo, Japan
| | - Koichi Masuda
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Keita Miura
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Ken Tajima
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Makoto Hiki
- Department of Cardiovascular Biology and Medicine, Juntendo University School of Medicine, Tokyo, Japan.,Department of Emergency and Disaster Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Takuo Hayashi
- Department of Human Pathology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kenji Suzuki
- Department of General Thoracic Surgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuhisa Takahashi
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
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14
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Vargas-Vila MA, Gibbons MC, Wu IT, Esparza MC, Kato K, Johnson SD, Masuda K, Ward SR. Progression of muscle loss and fat accumulation in a rabbit model of rotator cuff tear. J Orthop Res 2022; 40:1016-1025. [PMID: 34392563 PMCID: PMC8844305 DOI: 10.1002/jor.25160] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 02/17/2021] [Revised: 06/09/2021] [Accepted: 07/30/2021] [Indexed: 02/04/2023]
Abstract
Rotator cuff (RC) tears present a treatment challenge due to muscle atrophy and degeneration, fatty infiltration, and fibrosis. The purpose of this study was to generate a high time-resolution model of RC tear in rabbits and to characterize the progression of architectural and histological changes. Thirty-five female New Zealand White rabbits (age: 6 months) underwent left supraspinatus tenotomy. Five rabbits were used to evaluate immediate muscle architectural changes. The remaining 30 rabbits underwent right shoulder sham surgery and sacrifice at 1, 2, 4, 8, or 16 weeks. Histology was used to quantify muscle fiber cross-sectional area (CSA), muscle degeneration and regeneration, and fat localized to inter- versus intrafascicular regions. Muscle fiber CSA decreased by 26.5% compared to sham at 16 weeks (effect of treatment, p < 0.0001). Muscle degeneration increased after tenotomy (effect of treatment, p = 0.0006) without any change in regeneration. Collagen and fat content increased by 4 weeks and persisted through 16 weeks. Interfascicular fat was increased at all time points, but intrafascicular fat was increased only at 1, 4, and 16 weeks posttenotomy. Intrafascicular fat adjacent to degenerating muscle fibers increased as well (effect of treatment, p < 0.0001; effect of time, p = 0.0102). Statement of clinical relevance: Rabbit supraspinatus tenotomy recapitulates key features of the pathophysiology of human RC tears, including muscle atrophy and degeneration, lack of regeneration, fat accumulation, and fibrosis.
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Affiliation(s)
| | | | - Isabella T. Wu
- Department of Orthopaedic Surgery, UC San Diego, La Jolla CA, USA
| | - Mary C. Esparza
- Department of Orthopaedic Surgery, UC San Diego, La Jolla CA, USA
| | - Kenji Kato
- Department of Orthopaedic Surgery, Nagoya City University, Nagoya, Japan
| | - Seth D. Johnson
- Department of Orthopaedic Surgery, UC San Diego, La Jolla CA, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, UC San Diego, La Jolla CA, USA
| | - Samuel R. Ward
- Department of Orthopaedic Surgery, UC San Diego, La Jolla CA, USA,Department of Bioengineering, UC San Diego, La Jolla CA, USA,Department of Radiology, UC San Diego, La Jolla CA, USA
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15
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Cheng VK, Hasegawa M, Hattori T, Ito N, Linn E, Cheng K, Hughes-Austin J, Masuda K, Sudo A. Prevalence of radiographic hip dysplasia in Japanese population-based study. Mod Rheumatol 2022; 32:438-443. [PMID: 33910453 DOI: 10.1080/14397595.2021.1918884] [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: 09/30/2020] [Accepted: 04/11/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES The purpose of this study was to measure the indices of radiographic developmental dysplasia of the hip (DDH) in a cross-sectional study of an elderly Japanese population. METHODS Hip radiographs of 427 informed, voluntary Japanese community-dwelling individuals (279 female and 148 male) aged 50-96 years-old were obtained from Miyagawa village in Japan through a health screening. The hip radiographs were measured by a custom-written, semi-automated MATLAB program. The center edge (CE) angle, acetabular roof obliquity (ARO), acetabular head index (AHI), and minimum joint space width (mJSW) were measured. We examined the associations between gender, side-of-hip, and age group on radiographic DDH and hip osteoarthritis (OA). RESULTS The mean CE angle was 31.0°. The mean ARO was 5.8°. The mean AHI was 88.2%. The mean mJSW was 4.0 mm. Of the total population, 29.9% had DDH and 4.0% had hip OA. Of those who had hip OA, 41.2% were secondary OA, and 58.8% were primary OA. The relationship between DDH and OA was not significant. CONCLUSION DDH is unlikely to be an important cause of hip OA in the present population-based study.
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Affiliation(s)
- Veronica K Cheng
- Department of Orthopaedic Surgery, University of California San Diego, San Diego, CA, USA
| | - Masahiro Hasegawa
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | - Tetsuya Hattori
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | - Naoya Ito
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | - Erikka Linn
- Department of Orthopaedic Surgery, University of California San Diego, San Diego, CA, USA
| | - Kevin Cheng
- Department of Orthopaedic Surgery, University of California San Diego, San Diego, CA, USA
| | - Jan Hughes-Austin
- Department of Orthopaedic Surgery, University of California San Diego, San Diego, CA, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California San Diego, San Diego, CA, USA
| | - Akihiro Sudo
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Mie, Japan
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16
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Wei Z, Lombardi AF, Lee RR, Wallace M, Masuda K, Chang EY, Du J, Bydder GM, Yang W, Ma YJ. Comprehensive assessment of in vivo lumbar spine intervertebral discs using a 3D adiabatic T 1ρ prepared ultrashort echo time (UTE-Adiab-T 1ρ) pulse sequence. Quant Imaging Med Surg 2022; 12:269-280. [PMID: 34993077 PMCID: PMC8666733 DOI: 10.21037/qims-21-308] [Citation(s) in RCA: 1] [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] [Received: 03/20/2021] [Accepted: 05/19/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND T1ρ has been extensively reported as a sensitive biomarker of biochemical changes in the nucleus pulposus (NP) and annulus fibrosis of intervertebral discs (IVDs). However, no T1ρ study of cartilaginous endplates (CEPs) has yet been reported because the relatively long echo times (TEs) of conventional clinical T1ρ sequences cannot effectively capture the fast-decaying magnetic resonance signals of CEPs, which have very short T2/T2*s. This can be overcome by using ultrashort echo time (UTE) T1ρ acquisitions. METHODS Seventeen subjects underwent UTE with adiabatic T1ρ preparation (UTE-Adiab-T1ρ) and T2-weighted fast spin echo imaging of their lumbar spines. Each IVD was manually segmented into seven regions (i.e., outer anterior annulus fibrosis, inner anterior annulus fibrosis, outer posterior annulus fibrosis, inner posterior annulus fibrosis, superior CEP, inferior CEP, and NP). T1ρ values of these sub-regions were correlated with IVD modified Pfirrmann grades and subjects' ages. In addition, T1ρ values were compared in subjects with and without low back pain (LBP). RESULTS Correlations of T1ρ values of the outer posterior annulus fibrosis, superior CEP, inferior CEP, and NP with modified Pfirrmann grades were significant (P<0.05) with R values of 0.51, 0.36, 0.38, and -0.94, respectively. Correlations of T1ρ values of the outer anterior annulus fibrosis, outer posterior annulus fibrosis, and NP with ages were significant with R equal to 0.52, 0.71, and -0.76, respectively. T1ρ differences of the outer posterior annulus fibrosis, inferior CEP, and NP between the subjects with and without LBP were significant (P=0.005, 0.020, and 0.000, respectively). CONCLUSIONS The UTE-Adiab-T1ρ sequence can quantify T1ρ of whole IVDs including CEPs. This is an advance, and of value for comprehensive assessment of IVD degeneration.
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Affiliation(s)
- Zhao Wei
- Department of Radiology, University of California San Diego, La Jolla, CA, USA;,Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China;,University of Chinese Academy of Sciences, Beijing, China
| | - Alecio F. Lombardi
- Department of Radiology, University of California San Diego, La Jolla, CA, USA;,Research Service, Veterans Affairs San Diego Healthcare System, La Jolla, CA, USA
| | - Roland R. Lee
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Mark Wallace
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA
| | - Koichi Masuda
- Department of Orthopedic Surgery, University of California San Diego, La Jolla, CA, USA
| | - Eric Y. Chang
- Department of Radiology, University of California San Diego, La Jolla, CA, USA;,Research Service, Veterans Affairs San Diego Healthcare System, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Graeme M. Bydder
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Wenhui Yang
- Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China;,University of Chinese Academy of Sciences, Beijing, China
| | - Ya-Jun Ma
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
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17
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Sudo T, Akeda K, Kawaguchi K, Hasegawa T, Yamada J, Inoue N, Masuda K, Sudo A. Intradiscal injection of monosodium iodoacetate induces intervertebral disc degeneration in an experimental rabbit model. Arthritis Res Ther 2021; 23:297. [PMID: 34876212 PMCID: PMC8653558 DOI: 10.1186/s13075-021-02686-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/24/2021] [Indexed: 12/15/2022] Open
Abstract
Background Establishing an optimal animal model for intervertebral disc (IVD) degeneration is essential for developing new IVD therapies. The intra-articular injection of monosodium iodoacetate (MIA), which is commonly used in animal models of osteoarthritis, induces cartilage degeneration and progressive arthritis in a dose- and time-dependent manner. The purpose of this study was to determine the effect of MIA injections into rabbit IVDs on the progression of IVD degeneration evaluated by radiographic, micro-computerized tomography (micro-CT), magnetic resonance imaging (MRI), and histological analyses. Methods In total, 24 New Zealand White (NZW) rabbits were used in this study. Under general anesthesia, lumbar discs from L1–L2 to L4–L5 had a posterolateral percutaneous injection of MIA in contrast agent (CA) (L1–L2: CA only; L2–L3: MIA 0.01 mg; L3–L4: 0.1 mg; L4–L5: 1.0 mg; L5–L6: non-injection (NI) control). Disc height was radiographically monitored biweekly until 12 weeks after injection. Six rabbits were sacrificed at 2, 4, 8, and 12 weeks post-injection and processed for micro-CT, MRI (T2-mapping), and histological analyses. Three-dimensional (3D) disc height in five anatomical zones was evaluated by 3D reconstruction of micro-CT data. Results Disc height of MIA-injected discs (L2–L3 to L4–L5) gradually decreased time-dependently (P < 0.0001). The disc height of MIA 0.01 mg-injected discs was significantly higher than those of MIA 0.1 and 1.0 mg-injected discs (P < 0.01, respectively). 3D micro-CT analysis showed the dose- and time-dependent decrease of 3D disc height of MIA-injected discs predominantly in the posterior annulus fibrosus (AF) zone. MRI T2 values of MIA 0.1 and 1.0 mg-injected discs were significantly decreased compared to those of CA and/or NI controls (P < 0.05). Histological analyses showed progressive time- and dose-degenerative changes in the discs injected with MIA (P < 0.01). MIA induced cell death in the rabbit nucleus pulposus with a high percentage, while the percentage of cell clones was low. Conclusions The results of this study showed, for the first time, that the intradiscal injection of MIA induced degenerative changes of rabbit IVDs in a time- and dose-dependent manner. This study suggests that MIA injection into rabbit IVDs could be used as an animal model of IVD degeneration for developing future treatments.
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Affiliation(s)
- Takao Sudo
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Koji Akeda
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan.
| | - Koki Kawaguchi
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Takahiro Hasegawa
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Junichi Yamada
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
| | - Nozomu Inoue
- Department of Orthopedic Surgery, Rush Medical College, Chicago, IL, 60612-3833, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California, San Diego, 9500 Gilman Dr, La Jolla, 92093-0863, USA
| | - Akihiro Sudo
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan
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18
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Ishii Y, Aiba N, Ando M, Asakura N, Bierwage A, Cara P, Dzitko H, Edao Y, Gex D, Hasegawa K, Hayashi T, Hiwatari R, Hoshino T, Ikeda Y, Ishida S, Isobe K, Iwai Y, Jokinen A, Kasugai A, Kawamura Y, Kim JH, Kondo K, Kwon S, Lorenzo SC, Masuda K, Matsuyama A, Miyato N, Morishita K, Nakajima M, Nakajima N, Nakamichi M, Nozawa T, Ochiai K, Ohta M, Oyaidzu M, Ozeki T, Sakamoto K, Sakamoto Y, Sato S, Seto H, Shiroto T, Someya Y, Sugimoto M, Tanigawa H, Tokunaga S, Utoh H, Wang W, Watanabe Y, Yagi M. R&D Activities for Fusion DEMO in the QST Rokkasho Fusion Institute. Fusion Science and Technology 2021. [DOI: 10.1080/15361055.2021.1925030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Y. Ishii
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Aiba
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - M. Ando
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Asakura
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - A. Bierwage
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - P. Cara
- IFMIF/EVEDA Project Team, Rokkasho-Vill., Japan
| | - H. Dzitko
- Fusion for Energy, Broader Approach, Garching, Germany
| | | | - D. Gex
- Fusion for Energy, Broader Approach, Garching, Germany
| | - K. Hasegawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Hayashi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - R. Hiwatari
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Hoshino
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Ikeda
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Ishida
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Isobe
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Iwai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - A. Jokinen
- IFMIF/EVEDA Project Team, Rokkasho-Vill., Japan
| | - A. Kasugai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Kawamura
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - J. H. Kim
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Kondo
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Kwon
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. C. Lorenzo
- Fusion for Energy, Broader Approach, Barcelona, Spain
| | - K. Masuda
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - A. Matsuyama
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Miyato
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Morishita
- Kyoto University, Institute of Advanced Energy, Uji, Japan
| | - M. Nakajima
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Nakajima
- National Institute for Fusion Science, Department of Helical Plasma Research Rokkasho Research Center, Rokkasho-Vill., Japan
| | - M. Nakamichi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Nozawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Ochiai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Ohta
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Oyaidzu
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Ozeki
- NAT Corporation, Tohoku Branch Office, Rokkasho-Vill., Japan
| | - K. Sakamoto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Sakamoto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Sato
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - H. Seto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Shiroto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Someya
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Sugimoto
- NAT Corporation, Tohoku Branch Office, Rokkasho-Vill., Japan
| | - H. Tanigawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Tokunaga
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - H. Utoh
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - W. Wang
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Watanabe
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Yagi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
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19
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Ido S, Masuda K, Yoshimura S, Tanaka H, Stugaard M. Loss of apical suction assessed by noninvasive pressure differences and twist in acute heart failure: a novel method using vector flow mapping. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Early diastolic intraventricular pressure difference (IVPD) reflects left ventricular (LV) apical suction, and IVPD is closely related to cardiac function, especially LV twist. Vector Flow Mapping (VFM) allows visualization of regional pressure distribution and noninvasive quantification of IVPD. The purpose of the present study was to investigate if and how IVPDs are related to LV twist in a model of acute heart failure (HF).
Methods
In 15 open-chest dogs, HF was induced by intracoronary injection of microspheres. The HF model was classified into two groups based on the LV end-diastolic pressure (LVEDP) (group1: LVEDP<18 mmHg (n=10), group2: LVEDP≥18 mmHg (n=8)).
Color Doppler images from apical long-axis views were acquired at baseline and during HF. From these images, pressure differences (ΔP) were calculated along the LV inflow tract throughout the cardiac cycle. For the purpose of this study, the differences between apex and base during isovolumic relaxation time (ΔPIRT) and rapid early inflow period (ΔPE) were used for analyses. Furthermore, apical and basal short axis high frame rate 2D images were acquired, and peak rotation and peak twist were analyzed.
Results
LVEDP was 7±9, 14±2, 21±3 mmHg for baseline, group1 HF, and group2 HF, respectively. Pressure differences (both ΔPIRT and ΔPE) were visibly changed by the increase of LVEDP (Figure), and the magnitude of ΔPIRT, ΔPE and peak twist decreased significantly with the severity of heart failure. There were significant relationships between pressure differences (ΔPIRT and ΔPE) and dP/dtmin, tau, EF and peak twist (Table). In multivariate analyses, tau and peak twist were independent predictors for ΔPIRT and peak twist was independent predictor for ΔPE.
Conclusion
VFM analysis is feasible to noninvasively assess the IVPDs in acute heart failure. The IVPDs are closely related to the twisting motion of the LV, and reflect loss of apical suction during severe HF.
Funding Acknowledgement
Type of funding sources: None. VFM images of pressure differencesCorrelations of pressure differences
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Affiliation(s)
- S Ido
- Osaka University Graduate School of Medicine, Division of Health Sciences, Suita, Japan
| | - K Masuda
- Sumitomo life multiphasic health test system, Osaka, Japan
| | - S Yoshimura
- Osaka University Graduate School of Medicine, Division of Health Sciences, Suita, Japan
| | - H Tanaka
- Osaka University Graduate School of Medicine, Division of Health Sciences, Suita, Japan
| | - M Stugaard
- Osaka University Graduate School of Medicine, Division of Health Sciences, Suita, Japan
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20
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Lombardi AF, Wei Z, Wong J, Carl M, Lee RR, Wallace M, Masuda K, Chang EY, Du J, Ma YJ. High contrast cartilaginous endplate imaging using a 3D adiabatic inversion-recovery-prepared fat-saturated ultrashort echo time (3D IR-FS-UTE) sequence. NMR Biomed 2021; 34:e4579. [PMID: 34219287 PMCID: PMC8944187 DOI: 10.1002/nbm.4579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/10/2021] [Accepted: 06/12/2021] [Indexed: 05/08/2023]
Abstract
Ultrashort echo time (UTE) sequences can image tissues with transverse T 2 /T 2 * relaxations too short to be efficiently observed on routine clinical MRI sequences, such as the vertebral body cartilaginous endplate (CEP). Here, we describe a 3D adiabatic inversion-recovery-prepared fat-saturated ultrashort echo time (3D IR-FS-UTE) sequence to highlight the CEP of vertebral bodies in comparison to the intervertebral disc (IVD) and bone marrow fat (BF) at 3 T. The IR-FS-UTE sequence used a 3D UTE sequence combined with an adiabatic IR preparation pulse centered in the middle of the water and fat peaks, while a fat saturation module was used to suppress the signal from fat. A slab-selective half pulse was used for signal excitation, and a 3D center-out cones trajectory was used for more efficient data sampling. The 3D IR-FS-UTE sequence was applied to an ex vivo human spine sample, as well as the spines of six healthy volunteers and of three patients with back pain. Bright continuous lines representing signal from CEP were found in healthy IVDs. The measured contrast-to-noise ratio was 18.5 ± 4.9 between the CEP and BF, and 20.3 ± 4.15 between the CEP and IVD for the six volunteers. Abnormal IVDs showed CEP discontinuity or irregularity in the sample and patient studies. In conclusion, the proposed 3D IR-FS-UTE sequence is feasible for imaging the vertebral body's CEP in vivo with high contrast.
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Affiliation(s)
- Alecio F. Lombardi
- Department of Radiology, University of California San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, CA, United States
| | - Zhao Wei
- Department of Radiology, University of California San Diego, CA, United States
| | - Jonathan Wong
- Department of Radiology, University of California San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, CA, United States
| | | | - Roland R. Lee
- Department of Radiology, University of California San Diego, CA, United States
| | - Mark Wallace
- Department of Anesthesiology, University of California San Diego, CA, United States
| | - Koichi Masuda
- Department of Orthopedic Surgery, University of California San Diego, CA, United States
| | - Eric Y. Chang
- Department of Radiology, University of California San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, CA, United States
| | - Jiang Du
- Department of Radiology, University of California San Diego, CA, United States
| | - Ya-Jun Ma
- Department of Radiology, University of California San Diego, CA, United States
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Kenmotsu H, Wakuda K, Mori K, Kato T, Sugawara S, Kirita K, Okamoto I, Azuma K, Nishino K, Teraoka S, Koyama R, Masuda K, Hayashi H, Toyozawa R, Miura S, Sato Y, Nakagawa K, Yamamoto N, Takahashi T. LBA44 Primary results of a randomized phase II study of osimertinib plus bevacizumab versus osimertinib monotherapy for untreated patients with non-squamous non-small cell lung cancer harboring EGFR mutations: WJOG9717L study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.2123] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Kanda Y, Yurube T, Morita Y, Takeoka Y, Kurakawa T, Tsujimoto R, Miyazaki K, Kakiuchi Y, Miyazaki S, Zhang Z, Takada T, Hoshino Y, Masuda K, Kuroda R, Kakutani K. Delayed notochordal cell disappearance through integrin α5β1 mechanotransduction during ex-vivo dynamic loading-induced intervertebral disc degeneration. J Orthop Res 2021; 39:1933-1944. [PMID: 33049071 DOI: 10.1002/jor.24883] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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] [Received: 05/27/2020] [Revised: 09/17/2020] [Accepted: 10/09/2020] [Indexed: 02/04/2023]
Abstract
The loss of nucleus pulposus (NP) notochordal cells is one of the key initial hallmarks of age-related intervertebral disc degeneration. Although the transmembrane mechanoreceptor integrin α5β1 is important in the process of disc degeneration, the relationship between integrin α5β1 and notochordal cell disappearance remains unclear. The purpose of this study was to elucidate the role of integrin α5β1 in the homeostasis of notochordal cells using an ex-vivo dynamic loading culture system that we developed. Rat tail functional spinal units (n = 80 from 40 rats) were cultured under unloading or 1.3-MPa, 1.0-Hz dynamic compressive loading for 48 or 144 h with or without an integrin α5β1 inhibitor. Disc histomorphology, cell viability, apoptosis, senescence, and phenotypic expression were investigated. Consequently, histological degenerative disc changes with decreased cell viability and increased cell apoptosis and senescence were observed with an extended loading duration. Immunofluorescence revealed that the expression of notochordal cell markers, CD24 and brachyury, and chondrocyte markers, collagen type II and SRY-box 9, declined with loading. In particular, reduction in notochordal cell marker expression was more dramatic than that in chondrocyte marker expression. Apoptotic terminal deoxynucleotidyl transferase dUTP nick-end labeling positivity was also higher in brachyury-positive notochordal cells. Furthermore, all these changes were delayed by inhibiting integrin α5β1. Findings of our dynamic loading regimen with a relatively high pressure suggest reproducibility of the cellularity and phenotypic disappearance of NP notochordal cells during adolescence, the susceptibility of notochordal cells to mechanical stimuli partially through the integrin α5β1 pathway, and future potential treatment of integrin regulation for intervertebral disc disease.
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Affiliation(s)
- Yutaro Kanda
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takashi Yurube
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yusuke Morita
- Department of Biomedical Engineering, Doshisha University, Kyoto, Japan
| | - Yoshiki Takeoka
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takuto Kurakawa
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ryu Tsujimoto
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kunihiko Miyazaki
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yuji Kakiuchi
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shingo Miyazaki
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Zhongying Zhang
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Toru Takada
- Department of Orthopaedic Surgery, Kobe Hokuto Hospital, Kobe, Japan
| | - Yuichi Hoshino
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California-San Diego, La Jolla, California, USA
| | - Ryosuke Kuroda
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kenichiro Kakutani
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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Lombardi AF, Jang H, Wei Z, Jerban S, Wallace M, Masuda K, Ma YJ. High-contrast osteochondral junction imaging using a 3D dual adiabatic inversion recovery-prepared ultrashort echo time cones sequence. NMR Biomed 2021; 34:e4559. [PMID: 34021649 PMCID: PMC8254801 DOI: 10.1002/nbm.4559] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/14/2021] [Accepted: 05/06/2021] [Indexed: 05/08/2023]
Abstract
While conventional MRI sequences cannot visualize tissues from the osteochondral junction (OCJ) due to these tissues' short transverse T2 /T2 * relaxations, ultrashort echo time (UTE) sequences can overcome this limitation. A 2D UTE sequence with a dual adiabatic inversion recovery preparation (DIR-UTE) for selective imaging of short T2 tissues with high contrast has previously been developed, but high sensitivity to eddy currents and aliased out-of-slice excitation make it difficult to image the thin layer of the OCJ in vivo. Here, we combine the DIR scheme with a 3D UTE cones sequence for volumetric imaging of OCJ tissues in vivo, aiming to generate higher OCJ contrast compared with a recently developed single IR-prepared UTE sequence with a fat saturation module (IR-FS-UTE). All sequences were implemented on a 3-T clinical scanner. The DIR-UTE cones sequence combined a 3D UTE cones sequence with two narrow-band adiabatic IR preparation pulses centered on water and fat spectrum frequencies, respectively. The 3D DIR-UTE cones sequence was first applied to a phantom, then to the knees of four healthy volunteers and four patients diagnosed with osteoarthritis and compared with the IR-FS-UTE sequence. In both phantom and volunteer studies, the proposed DIR-UTE cones sequence showed much higher contrast for OCJ imaging than the IR-FS-UTE sequence did. The 3D DIR-UTE cones sequence showed a significantly higher contrast-to-noise ratio between the OCJ and subchondral bone fat (mean, standard deviation [SD]: 25.7 ± 2.3) and between the OCJ and superficial layers of cartilage (mean, SD: 22.2 ± 3.5) compared with the IR-FS-UTE sequence (mean, SD: 10.8 ± 2.5 and 16.3 ± 2.6, respectively). The 3D DIR-UTE cones sequence is feasible for imaging of the OCJ region of the knee in vivo and produces both high resolution and high contrast.
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Affiliation(s)
- Alecio F. Lombardi
- Department of Radiology, University of California, San Diego, CA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, CA
| | - Zhao Wei
- Department of Radiology, University of California, San Diego, CA
| | - Saeed Jerban
- Department of Radiology, University of California, San Diego, CA
| | - Mark Wallace
- Department of Anesthesiology, University of California San Diego, La Jolla, CA
| | - Koichi Masuda
- Department of Orthopedic Surgery, University of California San Diego, La Jolla, CA
| | - Ya-Jun Ma
- Department of Radiology, University of California, San Diego, CA
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Kato K, Akeda K, Miyazaki S, Yamada J, Muehleman C, Miyamoto K, Asanuma YA, Asanuma K, Fujiwara T, Lenz ME, Nakazawa T, An H, Masuda K. NF-kB decoy oligodeoxynucleotide preserves disc height in a rabbit anular-puncture model and reduces pain induction in a rat xenograft-radiculopathy model. Eur Cell Mater 2021; 42:90-109. [PMID: 34284523 DOI: 10.22203/ecm.v042a07] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
While it is known that the degenerated intervertebral disc (IVD) is one of the primary reasons for low-back pain and subsequent need for medical care, there are currently no established effective methods for direct treatment. Nuclear factor-κB (NF-κB) is a transcription factor that regulates various genes' expression, among which are inflammatory cytokines, in many tissues including the IVD. NF-κB decoy is an oligodeoxynucleotide containing the NF-κB binding site that entraps NF-κB subunits, resulting in suppression of NF-κB activity. In the present preclinical study, NF-κB decoy was injected into degenerated IVDs using the rabbit anular-puncture model. In terms of distribution, NF-κB decoy persisted in the IVDs up to at least 4 weeks after injection. The remaining amount of NF-κB decoy indicated that it fit a double-exponential-decay equation. Investigation of puncture-caused degeneration of IVDs showed that NF-κB decoy injection recovered, dose-dependently, the reduced disc height that was associated with reparative cell cloning and morphological changes, as assessed through histology. Gene expression, by quantitative real-time polymerase chain reaction (qRT-PCR), showed that NF-κB decoy attenuated inflammatory gene expression, such as that of interleukin-1 and tumor necrosis factor-α, in rabbit degenerated IVDs. NF-κB decoy also reduced the pain response as seen using the "pain sensor" nude rat xenograft-radiculopathy model. This is the first report demonstrating that NF-κB decoy suppresses the inflammatory response in degenerated IVDs and restores IVD disc height loss. Therefore, the intradiscal injection of NF-κB decoy may have the potential as an effective therapeutic strategy for discogenic pain associated with degenerated IVDs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - K Masuda
- Department of Orthopedic Surgery, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093,
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Kozuka Y, Isogami S, Masuda K, Miura Y, Das S, Fujioka J, Ohkubo T, Kasai S. Observation of Nonlinear Spin-Charge Conversion in the Thin Film of Nominally Centrosymmetric Dirac Semimetal SrIrO_{3} at Room Temperature. Phys Rev Lett 2021; 126:236801. [PMID: 34170165 DOI: 10.1103/physrevlett.126.236801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 12/02/2020] [Accepted: 05/07/2021] [Indexed: 06/13/2023]
Abstract
Spin-charge conversion via spin-orbit interaction is one of the core concepts in the current spintronics research. The efficiency of the interconversion between charge and spin current is estimated based on Berry curvature of Bloch wave function in the linear-response regime. Beyond the linear regime, nonlinear spin-charge conversion in the higher-order electric field terms has recently been demonstrated in noncentrosymmetric materials with nontrivial spin texture in the momentum space. Here, we report the observation of the nonlinear charge-spin conversion in a nominally centrosymmetric oxide material SrIrO_{3} by breaking inversion symmetry at the interface. A large second-order magnetoelectric coefficient is observed at room temperature because of the antisymmetric spin-orbit interaction at the interface of Dirac semimetallic bands, which is subject to the symmetry constraint of the substrates. Our study suggests that nonlinear spin-charge conversion can be induced in many materials with strong spin-orbit interaction at the interface by breaking the local inversion symmetry to give rise to spin splitting in otherwise spin degenerate systems.
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Affiliation(s)
- Y Kozuka
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - S Isogami
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - K Masuda
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - Y Miura
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - Saikat Das
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - J Fujioka
- Faculty of Material Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - T Ohkubo
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - S Kasai
- Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
- Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama 332-0012, Japan
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Gullbrand SE, Ashinsky BG, Lai A, Gansau J, Crowley J, Cunha C, Engiles JB, Fusellier M, Muehleman C, Pelletier M, Presciutti S, Schol J, Takeoka Y, Yurube T, Zhang Y, Masuda K, Iatridis JC. Development of a standardized histopathology scoring system for intervertebral disc degeneration and regeneration in rabbit models-An initiative of the ORSspine section. JOR Spine 2021; 4:e1147. [PMID: 34337334 PMCID: PMC8313151 DOI: 10.1002/jsp2.1147] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/15/2021] [Accepted: 03/25/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The rabbit lumbar spine is a commonly utilized model for studying intervertebral disc degeneration and for the pre-clinical evaluation of regenerative therapies. Histopathology is the foundation for which alterations to disc morphology and cellularity with degeneration, or following repair or treatment are assessed. Despite this, no standardized histology grading scale has yet been established for the spine field for any of the frequently utilized animal models. AIMS The purpose of this study was to establish a new standardized scoring system to assess disc degeneration and regeneration in the rabbit model. MATERIALS AND METHODS The scoring system was formulated following a review of the literature and a survey of spine researchers. Validation of the scoring system was carried out using images provided by 4 independent laboratories, which were graded by 12 independent graders of varying experience levels. Reliability testing was performed via the computation of intra-class correlation coefficients (ICC) for each category and the total score. The scoring system was then further refined based on the results of the ICC analysis and discussions amongst the authors. RESULTS The final general scoring system involves scoring 7 features (nucleus pulposus shape, area, cellularity and matrix condensation, annulus fibrosus/nucleus pulposus border appearance, annulus fibrosus morphology, and endplate sclerosis/thickening) on a 0 (healthy) to 2 (severe degeneration) scale. ICCs demonstrated overall moderate to good agreement across graders. An addendum to the main scoring system is also included for use in studies evaluating regenerative therapeutics, which involves scoring cell cloning and morphology within the nucleus pulposus and inner annulus fibrosus. DISCUSSION Overall, this new scoring system provides an avenue to improve standardization, allow a more accurate comparison between labs and more robust evaluation of pathophysiology and regenerative treatments across the field. CONCLUSION This study developed a histopathology scoring system for degeneration and regeneration in the rabbit model based on reported practice in the literature, a survey of spine researchers, and validation testing.
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Affiliation(s)
- Sarah E. Gullbrand
- University of PennsylvaniaPhiladelphiaPennsylvaniaUSA
- Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaPennsylvaniaUSA
| | - Beth G. Ashinsky
- University of PennsylvaniaPhiladelphiaPennsylvaniaUSA
- Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaPennsylvaniaUSA
| | - Alon Lai
- Leni and Peter W. May Department of OrthopaedicsIchan School of MedicineNew YorkNew YorkUSA
| | - Jennifer Gansau
- Leni and Peter W. May Department of OrthopaedicsIchan School of MedicineNew YorkNew YorkUSA
| | - James Crowley
- Surgical and Orthopaedic Research Laboratories, Prince of Wales Clinical SchoolUNSWSydneyAustralia
| | - Carla Cunha
- i3S ‐ Instituto de Investigação e Inovação em Saúde, INEB ‐ Instituto de Engenharia BiomédicaPortoPortugal
| | - Julie B. Engiles
- University of PennsylvaniaPhiladelphiaPennsylvaniaUSA
- Department of Clinical Studies, New Bolton CenterSchool of Veterinary Medicine, University of Pennsylvania, PhiladelphiaPennsylvaniaUSA
| | - Marion Fusellier
- Inserm, UMR 1229, RMeS, Université de Nantes, ONIRISNantesFrance
| | | | - Matthew Pelletier
- Surgical and Orthopaedic Research Laboratories, Prince of Wales Clinical SchoolUNSWSydneyAustralia
| | | | - Jordy Schol
- Tokai University School of MedicineIseharaJapan
| | | | | | - Yejia Zhang
- University of PennsylvaniaPhiladelphiaPennsylvaniaUSA
- Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaPennsylvaniaUSA
| | | | - James C. Iatridis
- Leni and Peter W. May Department of OrthopaedicsIchan School of MedicineNew YorkNew YorkUSA
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Dahia CL, Engiles JB, Gullbrand SE, Iatridis JC, Lai A, Le Maitre CL, Lotz JC, Masuda K, Séguin CA, Tryfonidou MA. A perspective on the ORS Spine Section initiative to develop a multi-species JOR Spine histopathology series. JOR Spine 2021; 4:e1165. [PMID: 34337339 PMCID: PMC8313167 DOI: 10.1002/jsp2.1165] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 06/07/2021] [Indexed: 12/02/2022] Open
Abstract
This perspective summarizes the genesis, development, and potential future directions of the multispecies JOR Spine histopathology series.
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Affiliation(s)
- Chitra L. Dahia
- Orthopedic Soft Tissue Research ProgramHospital for Special SurgeryNew York CityNYUSA
- Department of Cell and Developmental BiologyWeill Cornell Medicine, Graduate School of Medical SciencesNew YorkNew YorkUSA
| | - Julie B. Engiles
- Department of Pathobiology, New Bolton Center, School of Veterinary MedicineUniversity of PennsylvaniaKennett SquarePennsylvaniaUSA
| | - Sarah E. Gullbrand
- Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaPennsylvaniaUSA
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic SurgeryUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | - James C. Iatridis
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mt. SinaiNew YorkNew YorkUSA
| | - Alon Lai
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mt. SinaiNew YorkNew YorkUSA
| | | | - Jeffrey C. Lotz
- Department of Orthopaedic SurgeryUniversity of CaliforniaSan FranciscoCaliforniaUSA
| | - Koichi Masuda
- Department of Orthopaedic SurgeryUniversity of CaliforniaSan DiegoCaliforniaUSA
| | - Cheryle A. Séguin
- Department of Physiology & PharmacologySchulich School of Medicine & Dentistry, Bone and Joint Institute, The University of Western OntarioLondonOntarioCanada
| | - Marianna A. Tryfonidou
- Department of Clinical Sciences, Faculty of Veterinary MedicineUtrecht UniversityUtrechtThe Netherlands
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Abstract
Background Peripheral nerve damage can have debilitating consequences. Rabbit sciatic nerve transection models allow the effective evaluation of surgical repair strategies for large nerve gaps. Despite advantages in size, ease of handling, and functional utility, rabbits can suffer from a number of side effects that affect animal welfare and the quality of scientific inquiry. Such side-effects, which include pressure ulcers and traumatic damage to the foot, are primarily a consequence of insensitivity of the distal hindlimb following sciatic nerve injury. In this study, we present a number of methodologies for identifying, treating, and preventing unintended adverse effects in rabbit sciatic nerve injury models. Results First, we categorize pressure ulcers according to their severity and describe the deployment of a padded bandaging technique to enable ulcer healing. We also introduce a proactive bandaging approach to reduce the likelihood of pressure ulcer formation. Second, we define phenotypes that distinguish between foot injuries resulting from self-mutilation (autotomy) from those caused by incidental traumatic injury secondary to sensori-motor damage. Finally, we detail an effective strategy to reduce the usage of Elizabethan collars; through a gradual weaning protocol, their usefulness in preventing autotomy is retained, while their propensity to impede rabbit grooming and cause abrasion-injury to the neck region is minimized. Conclusions We suggest that application of these methods offer a practical and systematic approach to avoid adverse side effects associated with rabbit sciatic nerve damage, enabling improved animal welfare and scientific outcomes in a powerful nerve injury model.
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Affiliation(s)
- Elisabeth Orozco
- Research Division, VA San Diego Healthcare System, San Diego, CA, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Sameer B Shah
- Research Division, VA San Diego Healthcare System, San Diego, CA, USA. .,Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA. .,Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA.
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Yamanaka M, Iwata H, Masuda K, Araki M, Okuno Y, Okamura M, Koiwa J, Tanaka T. A novel orexin antagonist from a natural plant was discovered using zebrafish behavioural analysis. Eur Rev Med Pharmacol Sci 2021; 24:5127-5139. [PMID: 32432777 DOI: 10.26355/eurrev_202005_21207] [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: 11/12/2022]
Abstract
OBJECTIVE Phenotypic screening is one of the most practical approaches to the identification of mediators of behaviour, since it is difficult to model brain function in vitro, at a cellular level. We used a zebrafish (Danio rerio) behavioural assay to discover novel, natural, neuroactive compounds. MATERIALS AND METHODS A zebrafish behavioural assay was performed for seven natural compounds, obtained from plants. The behavioural profiles were compared to those of known psychoactive drugs. We characterised a natural compound exhibiting a behaviour profile similar to that of suvorexant, using in silico, in vitro and microarray expression analysis. RESULTS The behavioural analysis performed in this study classified central nervous system drugs according to their mechanism. Zebrafish treated with a natural compound, 8b-(4'-Hydroxytigloyloxy) costunolide (8b), showed behaviour profiles similar to those of zebrafish treated with suvorexant, a known orexin antagonist. This behavioural assay was validated using in silico and in vitro assays, which revealed that the new compound was a dual orexin receptor antagonist. In addition, transcriptome analysis suggested that 8b might regulate the nuclear factor-κB (NF-κB) related pathway. CONCLUSIONS We conclude that zebrafish phenotypic screening, combined with in silico assays and gene expression profiling, is a useful strategy to discover and characterize novel therapeutic compounds, including natural products.
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Affiliation(s)
- M Yamanaka
- Department of Systems Pharmacology, Mie University, Graduate School of Medicine, Tsu, Mie, Japan.
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Masuda K, Yamazoe S, Baba A, Mogami T, Ogane S, Nomura T, Ojiri H. Correction to: Superselective intra-arterial chemoradiotherapy using altered blood flow compared to conventional systemic chemoradiotherapy for locally advanced oral squamous cell carcinoma: a single-center retrospective study. Oral Radiol 2021; 37:707. [PMID: 33686577 DOI: 10.1007/s11282-021-00522-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Koichi Masuda
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan.
| | - Shinji Yamazoe
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Akira Baba
- Department of Radiology, The Jikei Medical University Hosipital, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Takuji Mogami
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Satoru Ogane
- Oral Cancer Center, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Takeshi Nomura
- Oral Cancer Center, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei Medical University Hosipital, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
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Akeda K, Cheng K, Abarado E, Takegami N, Yamada J, Inoue N, Masuda K, Sudo A. Three-dimensional computed tomographic evaluation of lateral lumbar interbody fusion: morphometric change of intervertebral structure. Eur Spine J 2021; 30:1355-1364. [PMID: 33651180 DOI: 10.1007/s00586-021-06776-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 02/16/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE Two-dimensional (2D) analyses of intervertebral disc (IVD) height and foramen measurements following lateral lumbar interbody fusion (LLIF) have been reported. However, three-dimensional (3D) morphometric analysis of intervertebral structure using 3D computed tomography (3D CT) provides increased precision for measuring morphological changes. The purpose of this study was to evaluate 3D changes of lumbar IVD height and foramen diameter in degenerative lumbar disease patients following LLIF. METHODS Subject-based 3D CT lumbar models were created for 26 patients before and following LLIF. IVD height (whole and five anatomical zones) and foramen diameter (minimum and maximum) were measured based on the model using custom software. The sagittal placement of cages (SPC) and cross-sectional area of the thecal sac (CSA) were measured. Changes in these parameters by LLIF were quantified and statistically analysed. RESULTS Following LLIF, disc height increased by an average of 2.9 mm (P < 0.01). Post-operative measurements of both minimum and maximum diameters of the foramen were significantly increased by 1.0 mm and 1.9 mm, respectively (P < 0.01). Change in maximum foramen diameter was significantly correlated with change in disc height (P < 0.05). The SPC was significantly correlated with the changes in disc height and foraminal diameters (P < 0.05, respectively). No significant change between the change in disc height and CSA was found. CONCLUSION This preliminary study quantifies disc height and foramen diameter changes in 3D following LLIF. The presented data provide baseline intervertebral changes for future comparisons with follow-up studies and clinical outcomes. LEVEL OF EVIDENCE I Diagnostic: individual cross-sectional studies with the consistently applied reference standard and blinding.
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Affiliation(s)
- Koji Akeda
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, 514-8507, Japan.
| | - Kevin Cheng
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Edward Abarado
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Norihiko Takegami
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, 514-8507, Japan
| | - Junichi Yamada
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, 514-8507, Japan
| | - Nozomu Inoue
- Department of Orthopedic Surgery, Rush Medical College, Chicago, IL, USA
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Akihiro Sudo
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, 514-8507, Japan
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Lee J, Tan A, Zhou S, Liu S, Kim D, Masuda K, Batra U, Hayashi H, Goto Y, Tan S, Wu Y, Tan D, Ahn M. MA04.06 Clinical Characteristics and Outcomes in Advanced KRAS Mutant NSCLC – A Multi-Centre Collaboration in Asia (ATORG-005). J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Masuda K, Yamazoe S, Baba A, Mogami T, Ogane S, Nomura T, Ojiri H. Superselective intra-arterial chemoradiotherapy using altered blood flow compared to conventional systemic chemoradiotherapy for locally advanced oral squamous cell carcinoma: a single-center retrospective study. Oral Radiol 2021; 37:700-706. [PMID: 33616818 DOI: 10.1007/s11282-021-00519-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/09/2021] [Indexed: 12/01/2022]
Abstract
PURPOSE To evaluate the efficacy and safety of superselective intra-arterial (IA) chemoradiotherapy with cisplatin and transcatheter arterial embolization (TAE) on advanced oral cancer, and to compare it with that of systemic chemoradiotherapy. MATERIALS AND METHODS This single-center retrospective study included 23 consecutive patients with locally advanced oral squamous cell carcinoma from November 2011 to November 2019. Of these, 15 received superselective IA cisplatin chemoradiotherapy with altered blood flow in the branches of the external carotid artery, and eight received systemic chemoradiotherapy. Medical charts were reviewed for the evaluation of patient data, drug toxicity, and antitumor efficacy. RESULTS Local control rate for the superselective IA infusion group, who underwent 6-7 cycles was significantly higher than that of the systemic chemotherapy group (11/13, 85% vs 3/8, 38%; p = 0.04). Regional control, locoregional control, disease-free survival, and overall survival rates were not significantly different between the groups (p = 0.15-0.907). Acute toxicity rates of grade 3 or higher were not significantly different between the IA and IV chemotherapy groups (p = 0.221). CONCLUSION Superselective IA chemoradiotherapy with cisplatin using altered blood flow in the branches of the external carotid artery with TAE may be useful for inoperable oral cancer.
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Affiliation(s)
- Koichi Masuda
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan.
| | - Shinji Yamazoe
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Akira Baba
- Department of Radiology, The Jikei Medical University Hosipital, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Takuji Mogami
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Satoru Ogane
- Oral Cancer Center, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Takeshi Nomura
- Oral Cancer Center, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichiwaka, Chiba, 272-8513, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei Medical University Hosipital, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
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Baba A, Masuda K, Hashimoto K, Matsushima S, Yamauchi H, Ikeda K, Yamazaki M, Suzuki T, Ogane S, Kurokawa R, Kurokawa M, Ota Y, Mogami T, Nomura T, Ojiri H. Correlation between the magnetic resonance imaging features of squamous cell carcinoma of the buccal mucosa and pathologic depth of invasion. Oral Surg Oral Med Oral Pathol Oral Radiol 2021; 131:582-590. [PMID: 33516643 DOI: 10.1016/j.oooo.2020.12.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/24/2020] [Accepted: 12/31/2020] [Indexed: 01/18/2023]
Abstract
OBJECTIVE The objective of this study was to determine correlations between magnetic resonance imaging (MRI) features including radiologic depth of invasion (r-DOI) and pathologic DOI (p-DOI) of squamous cell carcinoma of the buccal mucosa. STUDY DESIGN In total, 31 lesions were retrospectively evaluated. MRI findings included detectability, buccinator muscle invasion (positive: BMI+, negative: BMI-), buccal fat pad invasion (positive: BFPI+, negative: BFPI-), and r-DOI measured on T2-weighted images (T2-DOI) and contrast-enhanced T1-weighted images (CET1-DOI). These findings were compared to the p-DOI of the tumors. RESULTS The p-DOI values of undetectable lesions were smaller than those of detectable lesions (P < .001), and the cutoff value was 1 mm. BMI+ and BFPI+ lesions had significantly larger p-DOI values than the corresponding BMI- and BFPI- lesions (P < .001), with cutoff values of 5 and 6 mm, respectively. The correlation coefficient between CET1-DOI and p-DOI was 0.68 (P < .001). CET1-DOI values were larger than p-DOI (P < .001) and the average difference between them was 3.4 mm. T2-DOI was inconclusive in 50% of cases. Interobserver agreements of MRI evaluation were good to very good. CONCLUSION MRI-derived parameters were useful in estimating p-DOI and may be helpful in predicting the depth of invasion of tumors and the risk of lymph node metastasis.
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Affiliation(s)
- Akira Baba
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan.
| | - Koichi Masuda
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, Ichikawa-shi, Chiba, Japan
| | - Kazuhiko Hashimoto
- Department of Pathology and Laboratory Medicine, Tokyo Dental College Ichikawa General Hospital, Ichikawa-shi, Chiba, Japan
| | - Satoshi Matsushima
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Hideomi Yamauchi
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Koshi Ikeda
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Masae Yamazaki
- Oral Cancer Center, Tokyo Dental College, Ichikawa-shi, Chiba, Japan
| | - Taiki Suzuki
- Oral Cancer Center, Tokyo Dental College, Ichikawa-shi, Chiba, Japan
| | - Satoru Ogane
- Oral Cancer Center, Tokyo Dental College, Ichikawa-shi, Chiba, Japan
| | - Ryo Kurokawa
- Department of Radiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Mariko Kurokawa
- Department of Radiology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Bunkyo-ku, Tokyo, Japan
| | - Yoshiaki Ota
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
| | - Takuji Mogami
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, Ichikawa-shi, Chiba, Japan
| | - Takeshi Nomura
- Oral Cancer Center, Tokyo Dental College, Ichikawa-shi, Chiba, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
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Sakai Y, Hamano H, Ochi H, Abe F, Masuda K, Iino H. Lactulose ingestion causes an increase in the abundance of gut-resident bifidobacteria in Japanese women: a randomised, double-blind, placebo-controlled crossover trial. Benef Microbes 2021; 12:43-53. [PMID: 33393445 DOI: 10.3920/bm2020.0100] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The genus Bifidobacterium comprises various bacterial species, and the complement of species within the human intestinal tract differs from individual to individual. The balance of these bifidobacterial species remains poorly understood, although it is known that the abundance of bifidobacteria increases following the ingestion of prebiotics. We previously conducted a randomised, placebo-controlled, double-blind, crossover study of 2 g/day lactulose ingestion for 2 weeks in 60 Japanese women. To study the effect of lactulose ingestion on each bifidobacterial species, here, we measured the abundance of each of the principal bifidobacterial species. After lactulose ingestion, the log cell counts of the Bifidobacterium adolescentis group (8.97±0.08 vs 9.39±0.08, P=0.0019), Bifidobacterium catenulatum group (9.45±0.10 vs 9.65±0.10, P=0.0032) and Bifidobacterium longum group (9.01±0.07 vs 9.29±0.07, P=0.0012) were significantly higher than in the placebo ingestion control group. However, the log cell counts were similar for Bifidobacterium breve (8.12±0.12 vs 8.33±0.12, P=0.20), Bifidobacterium bifidum (9.08±0.12 vs 9.42±0.14, P=0.095) and Bifidobacterium animalis subspecies lactis (8.65±0.53 vs 8.46±0.46, P=0.77). Cluster analysis of the log cell count data at the bifidobacterial species level revealed three distinct clusters, but the combinations and ratios of the constituent bifidobacteria were not affected by lactulose ingestion. Furthermore, principal coordinate analysis of the intestinal microbiota in the lactulose and placebo ingestion groups using Illumina MiSeq showed no significant differences in the intestinal microbiota as a whole. These results suggest that 2 g/day lactulose ingestion for 2 weeks significantly increases the abundance of intestinal bifidobacteria, but does not affect the intestinal microbiota as a whole.
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Affiliation(s)
- Y Sakai
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - H Hamano
- R&D Management Department, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - H Ochi
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - F Abe
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - K Masuda
- Department of Food Science and Nutrition, Faculty of Life and Environmental Sciences, Showa Women's University, 1-7 Taishidou, Setagaya-ku, Tokyo 154-8533, Japan
| | - H Iino
- Life Sciences for Living Systems, Graduate School, Showa Women's University, 1-7 Taishidou, Setagaya-ku, Tokyo 154-8533, Japan
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Afsahi AM, Lombardi AF, Wei Z, Carl M, Athertya J, Masuda K, Wallace M, Lee RR, Ma YJ. High-Contrast Lumbar Spinal Bone Imaging Using a 3D Slab-Selective UTE Sequence. Front Endocrinol (Lausanne) 2021; 12:800398. [PMID: 35069448 PMCID: PMC8777294 DOI: 10.3389/fendo.2021.800398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 12/13/2021] [Indexed: 01/11/2023] Open
Abstract
Ultra-short echo time (UTE) MRI with post-processing is a promising technique in bone imaging that produces a similar contrast to computed tomography (CT). Here, we propose a 3D slab-selective ultrashort echo time (UTE) sequence together with image post-processing to image bone structures in the lumbar spine. We also explore the intermodality agreement between the UTE and CT images. The lumbar spines of two healthy volunteers were imaged with 3D UTE using five different resolutions to determine the best imaging protocol. Then, four patients with low back pain were imaged with both the 3D UTE sequence and CT to investigate agreement between the imaging methods. Two other patients with low back pain were then imaged with the 3D UTE sequence and clinical conventional T1-weighted and T2-weighted fast spin-echo (FSE) MRI sequences for qualitative comparison. The 3D UTE sequence together with post-processing showed high contrast images of bone and high intermodality agreement with CT images. In conclusion, post-processed slab-selective UTE imaging is a feasible approach for highlighting bone structures in the lumbar spine and demonstrates significant anatomical correlation with CT images.
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Affiliation(s)
- Amir Masoud Afsahi
- Department of Radiology, University of California San Diego, San Diego, CA, United States
| | - Alecio F. Lombardi
- Department of Radiology, University of California San Diego, San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Zhao Wei
- Department of Radiology, University of California San Diego, San Diego, CA, United States
| | | | - Jiyo Athertya
- Department of Radiology, University of California San Diego, San Diego, CA, United States
| | - Koichi Masuda
- Department of Orthopedic Surgery, University of California San Diego, San Diego, CA, United States
| | - Mark Wallace
- Department of Anesthesiology, University of California San Diego, San Diego, CA, United States
| | - Roland R. Lee
- Department of Radiology, University of California San Diego, San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Ya-Jun Ma
- Department of Radiology, University of California San Diego, San Diego, CA, United States
- *Correspondence: Ya-Jun Ma,
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Abstract
Despite considerable research effort, there is a significant need for safe agents that stimulate bone formation. Treatment of large or complex bone defects remains a challenge. Implantation of small molecule-induced human bone marrow-derived mesenchymal stromal cells (hBMSCs) on an appropriate tricalcium phosphate (TCP) scaffold offers a robust system for noninvasive therapy for spinal fusion. To show the efficacy of this approach, we identified a small molecule curcuminoid that when combined with TCP ceramic in the presence of hBMSCs selectively induced growth of bone cells: after 8- or 25-day incubations, alkaline phosphatase was elevated. Treatment of hBMSCs with curcuminoid 1 and TCP ceramic increased osteogenic target gene expression (i.e., Runx2, BMP2, Osteopontin, and Osteocalcin) over time. In the presence of curcuminoid 1 and TCP ceramic, osteogenesis of hBMSCs, including proliferation, differentiation, and mineralization, was observed. No evidence of chondrogenic or adipogenic potential using this protocol was observed. Transplantation of curcuminoid 1-treated hBMSC/TCP mixtures into the spine of immunodeficient rats showed that it achieved spinal fusion and provided greater stability of the spinal column than untreated hBMSC-TCP implants or TCP alone implants. On the basis of histological analysis, greater bone formation was associated with curcuminoid 1-treated hBMSC implants manifested as contiguous growth plates with extensive hematopoietic territories. Stimulation of hBMSCs by administration of small molecule curcuminoid 1 in the presence of TCP ceramic afforded an effective noninvasive strategy that increased spinal fusion repair and provided greater stability of the spinal column after 8 weeks in immunodeficient rats. Impact statement Bone defects only slowly regenerate themselves in humans. Current procedures to restore spinal defects are not always effective. Some have side effects. In this article, a new method to produce bone growth within 8 weeks in rats is presented. In the presence of tricalcium phosphate ceramic, curcuminoid-1 small molecule-stimulated human bone marrow-derived mesenchymal stromal cells showed robust bone cell growth in vitro. Transplantation of this mixture into the spine showed efficient spinal fusion in rats. The approach presented herein provides an efficient biocompatible scaffold for delivery of a potentially clinically useful system that could be applicable in patients.
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Affiliation(s)
- Daniel A Ryan
- Human BioMolecular Research Institute, San Diego, California, USA
| | - Jiongjia Cheng
- Human BioMolecular Research Institute, San Diego, California, USA
| | - Koichi Masuda
- Department of Orthopedic Surgery, University of California, San Diego, San Diego, California, USA
| | - John R Cashman
- Human BioMolecular Research Institute, San Diego, California, USA
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Furuse J, Goyal L, Meric-Bernstam F, Hollebecque A, Valle J, Morizane C, Karasic T, Abrams T, Kelley R, Cassier P, Klumpen HJ, Uboha N, Mahipal A, Mitchell E, Ahn E, Chang HM, Masuda K, He Y, Benhadji K, Bridgewater J. 116MO Efficacy, safety, and quality of life (QoL) with futibatinib in patients (pts) with intrahepatic cholangiocarcinoma (iCCA) harboring FGFR2 fusions/rearrangements: FOENIX-CCA2. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.137] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Takumida H, Horinouchi H, Masuda K, Shinno Y, Okuma Y, Yoshida T, Goto Y, Yamamoto N, Ohe Y. 1327P Benchmarking the efficacy and safety of pembrolizumab plus chemotherapy to pembrolizumab monotherapy: A consecutive analysis of NSCLC patients with high PD-L1 expression. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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40
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Kaneko M, Tsuji K, Masuda K, Ueno K, Henmi K, Nakagawa S, Fujita R, Suzuki K, Inoue Y, Shindo H, Konishi E, Takamatsu T, Ukimura O. Automated urine cell image analysis with a convolutional neural network. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33493-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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41
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Masuda K, Takenaga S, Yamazoe S, Mogami T, Ojiri H. Successful treatment of spontaneous middle mediastinum hematoma due to rupture of bilateral bronchial artery with transcatheter arterial embolization using N-butyl-2-cyanoacrylate: A case report. Radiol Case Rep 2020; 15:988-991. [PMID: 32426082 PMCID: PMC7226650 DOI: 10.1016/j.radcr.2020.04.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/14/2020] [Accepted: 04/14/2020] [Indexed: 11/17/2022] Open
Affiliation(s)
- Koichi Masuda
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa-shi, Tokyo, 272-8513, Japan
- Corresponding author.
| | - Shinsuke Takenaga
- Department of Radiology, The Jikei University Katsushika Medical Center, Katsushika-ku, Tokyo, Japan
| | - Shinji Yamazoe
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa-shi, Tokyo, 272-8513, Japan
| | - Takuji Mogami
- Department of Radiology, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa-shi, Tokyo, 272-8513, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei Medical University Hospital, Minato-ku, Tokyo, Japan
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Arakawa Y, Tamagawa‐Mineoka R, Masuda K, Katoh N. Serum thymus and activation‐regulated chemokine levels before and after treatment for pruritic scabies. J Eur Acad Dermatol Venereol 2020; 34:e817-e818. [DOI: 10.1111/jdv.16698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Y. Arakawa
- Department of Dermatology Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto Japan
| | - R. Tamagawa‐Mineoka
- Department of Dermatology Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto Japan
| | - K. Masuda
- Department of Dermatology Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto Japan
| | - N. Katoh
- Department of Dermatology Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto Japan
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Miura T, Aoki T, Ohtsuka H, Aoki S, Hata T, Iseki M, Takadate T, Ariake K, Kawaguchi K, Masuda K, Ishida M, Mizuma M, Hayashi H, Nakagawa K, Morikawa T, Motoi F, Sasano H, Naitoh T, Kamei T, Unno M. Preoperative neutrophil‐to‐lymphocyte ratio (NLR) predicts recurrence after surgery in patient with pancreatic neuroendocrine neoplasm (PanNEN). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Masuda K, Minami S, Stugaard M, Kozuma A, Takeda S, Nakayama T, Asanuma T, Nakatani S. P2477Assessment of intraventricular flow dynamics in acute heart failure studied by Vector Flow Mapping. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Although left ventricular (LV) flow dynamics should be closely related to LV morphology and function, little is known about how heart failure (HF) changes it. Pathline Analysis (PA), a recently developed software based on Vector Flow Mapping (VFM, Hitachi), enables us to trace the virtual blood particles entering to the LV in diastole and being ejected in systole. We investigated the change of flow dynamics in HF induced in dogs using PA.
Methods
In 15 open-chest dogs, HF was induced by intracoronary injection of microspheres. Color Doppler images of apical long-axis view were acquired using Prosound F75 (Hitachi) before and after HF and were analyzed by PA. We calculated the ratio of the numbers of entering particles in diastole and ejected particles in systole (ejection rate) and the distance reached by the particles in diastole corrected by the LV long-axis diameter (propagation distance). Apical and basal short axis images were acquired using GE Vivid E9 and were analyzed for peak rotation and peak twist.
Results
After inducing HF, LV end-diastolic pressure increased from 6±2 to 15±5 mmHg (p<0.001) and ejection fraction (EF), apical peak rotation and peak twist decreased significantly (EF; 58±5 to 36±8%, apical peak rotation; 14±5 to 3±2 degree, peak twist; 19±5 to 6±3 degree, p<0.05, respectively). PA showed most of the entering particles to the LV were ejected in the following systole at the control stage, but in HF, a significant part of the entering particles were not ejected and remained in the LV (Figure). Ejection rate decreased from 50±11 to 26±11% (p<0.001) and the propagation distance decreased from 85±9 to 66±13% (p<0.001) after inducing HF. There were significant relationships between indices obtained by PA and EF and peak twist (Table).
Conclusion
A significant part of inflow is not ejected directly to the outflow in the next systole and remains in the LV in HF, suggesting inefficient flow dynamics.
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Affiliation(s)
- K Masuda
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - S Minami
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - M Stugaard
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - A Kozuma
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - S Takeda
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - T Nakayama
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - T Asanuma
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
| | - S Nakatani
- Osaka University Graduate School of Medicine Division of Functional Diagnostics, Suita, Osaka, Japan
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Tanekda S, Asanuma T, Masuda K, Kozuma A, Minami S, Nakayama T, Nakatani S. P1470Myocardial dysfunction index: a novel myocardial strain parameter for diagnosing myocardial ischemia. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background and purpose
Peak systolic strain (ε-sys) derived from speckle tracking echocardiography (STE) is a useful parameter for assessing regional contractile dysfunction during acute ischemia. However, low ε-sys does not always indicate myocardial ischemia because of its relatively large variation in segmental normal ranges and intervendor differences. Therefore, comparison of strain before and after an ischemic event and demonstration of a decrease in ε-sys should be necessary to confirm myocardial ischemia, which is not always possible in clinical situations. It is well known that early systolic lengthening (ESL) and post-systolic shortening (PSS) occur during acute ischemia. We hypothesized that ESL and PSS would correlate with the decrease in ε-sys and integrated analysis of ESL and PSS could be useful to diagnose the presence of myocardial ischemia.
Methods
2D short-axis or 3D full-volume images were acquired by Artida at baseline, during flow-limiting stenosis (mean 50±20% flow reduction), and during complete occlusion of the left circumflex coronary artery in 22 dogs (2D-STE = 12, 3D-STE = 10).Circumferential strain was analyzed in the center of risk area, and the absolute value of peak systolic strain (ε-sys), post-systolic strain index (PSI) as a parameter of PSS, and early systolic strain index (ESI) as a parameter of ESL were measured. A new parameter, myocardial dysfunction index (MDI), which was calculated as follows: (ESL amplitude + PSS amplitude)/maximal strain amplitude during the cardiac cycle, was also calculated. The difference in ε-sys between at baseline and during ischemia (Δε-sys) was measured and the diagnostic accuracy for estimating Δε-sys < −3% was assessed by the receiver operating characteristics (ROC) curve analysis.
Results
During ischemia, ε-sys decreased from 19±3 to 12±6% and MDI increased from 2±4 to 27±30%. MDI was significantly correlated with Δε-sys (2D-STE: r=−0.80, 3D-STE: r=−0.83, p<0.01, respectively) (Figure). The area under the curve (AUC) of MDI for estimating Δε-sys < −3% tended to be larger than those of ESI and PSI (MDI: 0.9, ESI: 0.73, PSI: 0.85).
Figure 1
Conclusions
The novel parameter, MDI was correlated with the decrease in ε-sys during acute ischemia. Integrated analysis of ESL and PSS may be useful for diagnosing the presence of myocardial ischemia.
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Affiliation(s)
- S Tanekda
- Osaka University Graduate School of Medicine, Suita, Japan
| | - T Asanuma
- Osaka University Graduate School of Medicine, Suita, Japan
| | - K Masuda
- Osaka University Graduate School of Medicine, Suita, Japan
| | - A Kozuma
- Osaka University Graduate School of Medicine, Suita, Japan
| | - S Minami
- Osaka University Graduate School of Medicine, Suita, Japan
| | - T Nakayama
- Osaka University Graduate School of Medicine, Suita, Japan
| | - S Nakatani
- Osaka University Graduate School of Medicine, Suita, Japan
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Masuda K, Horinouchi H, Tanaka M, Higashiyama R, Shinno Y, Sato J, Yoshida T, Matsumoto Y, Goto Y, Kanda S, Yamamoto N, Ohe Y. MA11.07 Efficacy of Immune-Checkpoint Inhibitors and EGFR-TKIs in NSCLC Patients with High PD-L1 Expression. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sheldrick K, Chamoli U, Masuda K, Miyazaki S, Kato K, Diwan AD. A novel magnetic resonance imaging postprocessing technique for the assessment of intervertebral disc degeneration-Correlation with histological grading in a rabbit disc degeneration model. JOR Spine 2019; 2:e1060. [PMID: 31572977 PMCID: PMC6764792 DOI: 10.1002/jsp2.1060] [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: 12/18/2018] [Revised: 06/14/2019] [Accepted: 06/17/2019] [Indexed: 11/09/2022] Open
Abstract
INTRODUCTION Estimation of intervertebral disc degeneration on magnetic resonance imaging (MRI) is challenging. Qualitative schemes used in clinical practice correlate poorly with pain and quantitative techniques have not entered widespread clinical use. METHODS As part of a prior study, 25 New Zealand white rabbits underwent annular puncture to induce disc degeneration in 50 noncontiguous lumbar discs. At 16 weeks, the animals underwent multi-echo T2 MRI scanning and were euthanized. The discs were stained and examined histologically. Quantitative T2 relaxation maps were prepared using the nonlinear least squares method. Decay Variance maps were created using a novel technique of aggregating the deviation in the intensity of each echo signal from the expected intensity based on the previous rate of decay. RESULTS Decay Variance maps showed a clear and well demarcated nucleus pulposus with a consistent rate of decay (low Decay Variance) in healthy discs that showed progressively more variable decay (higher Decay Variance) with increasing degeneration. Decay Variance maps required significantly less time to generate (1.0 ± 0.0 second) compared with traditional T2 relaxometry maps (5 (±0.9) to 1788.9 (±116) seconds). Histology scores correlated strongly with Decay Variance scores (r = 0.82, P < .01) and weakly with T2 signal intensity (r = 0.32, P < .01) and quantitative T2 relaxometry (r = 0.39, P < .01). Decay Variance had superior sensitivity and specificity for the detection of degenerate discs when compared to T2 signal intensity or Quantitative T2 mapping. CONCLUSION Our results show that using a multi-echo T2 MRI sequence, Decay Variance can quantitatively assess disc degeneration more accurately and with less image-processing time than quantitative T2 relaxometry in a rabbit disc puncture model. The technique is a viable candidate for quantitative assessment of disc degeneration on MRI scans. Further validation on human subjects is needed.
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Affiliation(s)
- Kyle Sheldrick
- Spine Service, Department of Orthopaedic Surgery, St. George & Sutherland Clinical SchoolUniversity of New South WalesSydneyNew South WalesAustralia
| | - Uphar Chamoli
- Spine Service, Department of Orthopaedic Surgery, St. George & Sutherland Clinical SchoolUniversity of New South WalesSydneyNew South WalesAustralia
- School of Biomedical Engineering, Faculty of Engineering & Information TechnologyUniversity of Technology SydneySydneyNew South WalesAustralia
| | - Koichi Masuda
- Department of Orthopaedic SurgeryUniversity of CaliforniaSan DiegoCalifornia
| | - Shingo Miyazaki
- Department of Orthopaedic SurgeryUniversity of CaliforniaSan DiegoCalifornia
| | - Kenji Kato
- Department of Orthopaedic SurgeryUniversity of CaliforniaSan DiegoCalifornia
| | - Ashish D. Diwan
- Spine Service, Department of Orthopaedic Surgery, St. George & Sutherland Clinical SchoolUniversity of New South WalesSydneyNew South WalesAustralia
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Sakai Y, Seki N, Hamano K, Ochi H, Abe F, Masuda K, Iino H. Prebiotic effect of two grams of lactulose in healthy Japanese women: a randomised, double-blind, placebo-controlled crossover trial. Benef Microbes 2019; 10:629-639. [DOI: 10.3920/bm2018.0174] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Sixty healthy Japanese women with a defaecation frequency of 2-4 times/week participated in this randomised, double-blind crossover trial. Participants received 2 g/day lactulose for 2 weeks and placebo in a random order, separated by a washout period of 3 weeks. Eight participants were excluded who did not satisfy the conditions, and therefore data from 52 were analysed. The primary outcome was defaecation frequency and the secondary outcomes were the number of defaecation days, faecal consistency, faecal volume, and the number and percentage of Bifidobacterium in faeces. The defaecation frequency (times/week) was significantly higher during lactulose (4.28±0.23) than placebo (3.83±0.23) treatment (delta (Δ) 0.45 [95% confidence interval (CI) 0.10-0.80], P=0.013). The defaecation days (days/week) was significantly higher during lactulose (3.77±0.17) than placebo (3.47±0.17) treatment (Δ0.30 [95% CI 0.04-0.56], P=0.024). Faecal consistency using the Bristol Stool Scale (/defaecation) was significantly higher during lactulose (3.84±0.10) than placebo (3.68±0.10) treatment (Δ0.16 [95% CI 0.00-0.31], P=0.044). Faecal volume (/week) was significantly higher during lactulose (21.73±3.07) than placebo (17.65±3.07) treatment (Δ4.08 [95% CI 0.57-7.60], P=0.024). The number of Bifidobacterium in faeces (log colony forming units/g faeces) was significantly higher during lactulose (9.53±0.06) than placebo (9.16±0.06) treatment (Δ0.37 [95% CI 0.23-0.49], P<0.0001). The percentage of Bifidobacterium in faeces was also significantly higher during lactulose (25.3±1.4) than placebo (18.2±1.4) treatment (Δ7.1 [95% CI 2.9-11.4], P=0.0014). Finally, straining at defaecation (/defaecation) during lactulose (3.62±0.24) treatment was significantly lower than during placebo (3.97±0.24) treatment (Δ0.35 [95% CI -0.69 – -0.02], P=0.037). No significant difference was observed between lactulose and placebo with regard to flatulence. Severe adverse effects did not occur. Thus, oral ingestion of 2 g/day lactulose had a prebiotic effect, increasing the number and percentage of bifidobacteria in faeces, softening the faeces, and increasing defaecation frequency, but without increasing flatulence.
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Affiliation(s)
- Y. Sakai
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - N. Seki
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - K. Hamano
- R&D Management Department, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - H. Ochi
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - F. Abe
- Food Ingredients & Technology Institute, R&D Division, Morinaga Milk Industry Co., Ltd., 5-1-83 Higashihara, Zama, Kanagawa 252-8583, Japan
| | - K. Masuda
- Department of Food Science and Nutrition, Faculty of Life and Environmental Sciences, Showa Women’s University, 1-7 Taishidou, Setagaya-ku, Tokyo 154-8533, Japan
| | - H. Iino
- Life Sciences for Living Systems, Graduate School, Showa Women’s University, 1-7 Taishidou, Setagaya-ku, Tokyo 154-8533, Japan
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Abstract
Low back pain (LBP) is now regarded as the first cause of disability worldwide and should be a priority for future research on prevention and therapy. Intervertebral disc (IVD) degeneration is an important pathogenesis of LBP. Platelet-rich plasma (PRP) is an autologous blood concentrate that contains a natural concentration of autologous growth factors and cytokines and is currently widely used in the clinical setting for tissue regeneration and repair. PRP has great potential to stimulate cell proliferation and metabolic activity of IVD cells in vitro. Several animal studies have shown that the injection of PRP into degenerated IVDs is effective in restoring structural changes (IVD height) and improving the matrix integrity of degenerated IVDs as evaluated by magnetic resonance imaging (MRI) and histology. The results of this basic research have shown the great possibility that PRP has significant biological effects for tissue repair to counteract IVD degeneration. Clinical studies for evaluating the effects of the injection of PRP into degenerated IVDs for patients with discogenic LBP have been reviewed. Although there was only one double-blind randomized controlled trial, all the studies reported that PRP was safe and effective in reducing back pain. While the clinical evidence of tissue repair of IVDs by PRP treatment is currently lacking, there is a great possibility that the application of PRP has the potential to lead to a feasible intradiscal therapy for the treatment of degenerative disc diseases. Further large-scale studies may be required to confirm the clinical evidence of PRP for the treatment of discogenic LBP.
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Affiliation(s)
- Koji Akeda
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie 514-8507, Japan,
| | - Junichi Yamada
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie 514-8507, Japan,
| | - Erikka T Linn
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA 92093-0863, USA
| | - Akihiro Sudo
- Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie 514-8507, Japan,
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA 92093-0863, USA
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Miyazaki S, Diwan AD, Kato K, Cheng K, Bae WC, Sun Y, Yamada J, Muehleman C, Lenz ME, Inoue N, Sah RL, Kawakami M, Masuda K. Correction to: ISSLS PRIZE IN BASIC SCIENCE 2018: Growth differentiation factor-6 attenuated pro-inflammatory molecular changes in the rabbit anular-puncture model and degenerated disc-induced pain generation in the rat xenograft radiculopathy model. Eur Spine J 2019; 28:889. [PMID: 30661198 DOI: 10.1007/s00586-019-05878-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The author "Ashish D. Diwan" receives educational consultant fees from Nuvasive Inc.
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Affiliation(s)
- Shingo Miyazaki
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA.,Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-Cho Chuo-Ku, Kobe, 650-0017, Hyogo, Japan
| | - Ashish D Diwan
- Orthopaedic Research Institute and Department of Orthopaedic Surgery, St George Hospital, University of New South Wales, Suite 16, Lvl 5, 1 South Street, Kogarah, Sydney NSW, 2217, Australia
| | - Kenji Kato
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA.,Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medicine, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Aichi, Japan
| | - Kevin Cheng
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA
| | - Won C Bae
- Department of Radiology, University of California-San Diego, 9500 Gilman Dr., MC0997, La Jolla, CA, 92093-0997, USA
| | - Yang Sun
- Department of Bioengineering, University of California-San Diego, 9500 Gilman Dr., MC0412, La Jolla, CA, 92093-0412, USA.,Orthopaedic Medical Center, the Second Hospital of Jilin University, Changchun, Jilin, China
| | - Junichi Yamada
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA.,Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, 514-8507, Mie, Japan
| | - Carol Muehleman
- Department of Biochemistry, Rush University Medical Center, 1645 W Harrison St, 5th floor, Chicago, 60612, IL, USA
| | - Mary E Lenz
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA
| | - Nozomu Inoue
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite 204 J, Chicago, 60612, IL, USA
| | - Robert L Sah
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA.,Department of Bioengineering, University of California-San Diego, 9500 Gilman Dr., MC0412, La Jolla, CA, 92093-0412, USA
| | - Mamoru Kawakami
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219, Myouji, Katsuragicho, Ito Gun, 649-7113, Wakayama, Japan
| | - Koichi Masuda
- Department of Orthopaedic Surgery, University of California-San Diego, 9500 Gilman Dr., MC0863, La Jolla, CA, 92093-0863, USA.
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