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Sato S, Hanai T, Kanamoto T, Kawano F, Hikida M, Yokoi H, Take Y, Magome T, Ebina K, Mae T, Tanaka H, Nakata K. Vibration acceleration enhances proliferation, migration, and maturation of C2C12 cells and promotes regeneration of muscle injury in male rats. Physiol Rep 2024; 12:e15905. [PMID: 38396237 PMCID: PMC10890929 DOI: 10.14814/phy2.15905] [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: 09/26/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 02/25/2024] Open
Abstract
Vibration acceleration (VA) using a whole-body vibration device is beneficial for skeletal muscles. However, its effect at the cellular level remains unclear. We aimed to investigate the effects of VA on muscles in vitro and in vivo using the C2C12 mouse myoblast cell line and cardiotoxin-induced injury in male rat soleus muscles. Cell proliferation was evaluated using the WST/CCK-8 assay and proportion of Ki-67 positive cells. Cell migration was assessed using wound-healing assay. Cell differentiation was examined by the maturation index in immunostained cultured myotubes and real-time polymerase chain reaction. Regeneration of soleus muscle in rats was assessed by recruitment of satellite cells, cross-sectional area of regenerated muscle fibers, number of centrally nucleated fibers, and conversion of regenerated muscle from fast- to slow-twitch. VA at 30 Hz with low amplitude for 10 min promoted C2C12 cell proliferation, migration, and myotube maturation, without promoting expression of genes related to differentiation. VA significantly increased Pax7-stained satellite cells and centrally nucleated fibers in injured soleus muscles on Day 7 and promoted conversion of fast- to slow-twitch muscle fibers with an increase in the mean cross-sectional area of regenerated muscle fibers on Day 14. VA enhanced the proliferation, migration, and maturation of C2C12 myoblasts and regeneration of injured rat muscles.
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Affiliation(s)
- Seira Sato
- Department of Sports Medical ScienceOsaka University Graduate School of MedicineSuitaOsakaJapan
- Department of Medicine for Sports and Performing ArtsOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Tatsuhiro Hanai
- Department of Medicine for Sports and Performing ArtsOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Takashi Kanamoto
- Department of Medicine for Sports and Performing ArtsOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Fuminori Kawano
- Graduate School of Health SciencesMatsumoto UniversityMatsumotoNaganoJapan
| | - Minami Hikida
- Department of Oral and Maxillofacial SurgeryNihon University School of DentistryChiyoda‐kuTokyoJapan
| | - Hiroyuki Yokoi
- Yokoi Health Care and Sports Orthopaedics ClinicToyonakaOsakaJapan
| | - Yasuhiro Take
- Department of Medicine for Sports and Performing ArtsOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Takuya Magome
- Department of Medicine for Sports and Performing ArtsOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Kosuke Ebina
- Department of Musculoskeletal Regenerative MedicineOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Tatsuo Mae
- Department of Sports Medical BiomechanicsOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Hiroyuki Tanaka
- Department of Sports Medical ScienceOsaka University Graduate School of MedicineSuitaOsakaJapan
| | - Ken Nakata
- Department of Medicine for Sports and Performing ArtsOsaka University Graduate School of MedicineSuitaOsakaJapan
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Nakagawa S, Hirose T, Hanai H, Tsunematsu T, Ohori T, Yokoi H, Uchida R. Unrecognized glenoid fracture in opposite shoulders with symptomatic anterior instability. J Orthop Sci 2024; 29:122-127. [PMID: 36402605 DOI: 10.1016/j.jos.2022.10.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 10/26/2022] [Accepted: 10/29/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND The purpose of the present study was to investigate the characteristics of unrecognized glenoid fracture in opposite shoulders with symptomatic anterior instability. METHODS Participants were 38 patients, who had complaints of instability on only one side (symptomatic shoulder) and had no complaints despite of a glenoid fracture on the other shoulder (asymptomatic shoulder) from 2011 to 2020. Factors that could influence the onset of symptoms including glenoid rim morphology were retrospectively investigated. RESULTS Among the asymptomatic shoulders, 16 had a single traumatic event and 22 had no history of trauma. The glenoid morphology was normal in 6, erosion in 12 and bony Bankart in 20 on the symptomatic side, whereas the respective shoulders were 0, 16 and 22 on the asymptomatic side. Bone union of bony Bankart was complete in 9, partial in 3 and non-union in 8 on the symptomatic side, whereas the respective shoulders were 18, 3 and 1 on the asymptomatic side. The mean glenoid defect size was 10.4% and 7.8%, and the mean bone fragment size was 5.0% and 4.5%, respectively. The mean medial displacement of bone fragments was 2.6 mm and 1.0 mm, respectively (p < 0.001). A larger glenoid defect (≥10%) was recognized in 19 symptomatic shoulders and 10 asymptomatic shoulders. Among them, erosion was solely recognized in 5 symptomatic shoulders. In shoulders with bony Bankart, all 10 asymptomatic shoulders had a completely or partially united fragment with less than 2 mm displacement. On the other hand, among 14 symptomatic shoulders, united fragment was solely recognized in 8 shoulders, in which medial displacement was less than 2 mm in 3 shoulders. CONCLUSIONS Even if a glenoid fracture occurred, symptom such as instability or pain was not always recognized by all patients. Regardless of glenoid defect size, shoulders with a completely or partially united bone fragment and with less than 2 mm displacement were found to be asymptomatic.
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Affiliation(s)
- Shigeto Nakagawa
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan.
| | - Takehito Hirose
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Hiroto Hanai
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Toshitaka Tsunematsu
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Tomoki Ohori
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Ryohei Uchida
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
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Mae T, Nakata K, Yokoi H, Ohori T, Sato S, Hirose T, Uchida R. Knot location in arthroscopic inside-out meniscal repair: Cadaveric evaluation. J Orthop Sci 2024; 29:217-223. [PMID: 36585314 DOI: 10.1016/j.jos.2022.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 11/10/2022] [Accepted: 12/09/2022] [Indexed: 12/29/2022]
Abstract
BACKGROUND The inside-out repair technique is the gold standard for treatment of meniscal tears, while some soft tissues can be hung as the sutures are tied outside the capsule. The purpose was to clarify the association between the suture site and knot location in the arthroscopic inside-out technique. METHODS Inside-out meniscal suture was arthroscopically performed on medial and lateral menisci in twenty-three cadaveric knees, on the assumption that longitudinal tear existed. A retractor was inserted above the semi-membranous tendon and anterior to the gastrocnemius for the medial side, while the retractor was placed in the anterior space of the gastrocnemius for the lateral side. After identifying three segments (anterior, middle and posterior segments), eight sutures were inserted into the following eight areas in each knee: anterior (M1, L1) and posterior (M2, L2) areas of the middle segment, and anterior (M3, L3) and posterior (M4, L4) areas of the posterior segment. Twelve knees underwent meniscal repair on femoral side and eleven passed sutures on the tibial side, while knots were tied outside of the joint. Attentive dissection was performed to assess the relation between knot locations and the principal structures around the knee joint. RESULTS In medial meniscal suture, most sutures for the middle portion (M1, 2) bound medial collateral ligament (MCL), while a few cases included the semi-membranous tendon for the M4 area. In lateral meniscal suture, sutures for the L1 area tied some fibers of lateral collateral ligament (LCL) in high frequency, while popliteal muscles/tendons were tied over at the L3 area. CONCLUSIONS Most suture knots were located on MCL or capsule in medial meniscus suture, while more than half sutures passed through LCL or popliteal tendon/muscle in lateral meniscus suture. An assistant should retract LCL under direct observation and the surgeon must confirm the direction of needle for lateral meniscal repair.
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Affiliation(s)
- Tatsuo Mae
- Department of Sports Medical Biomechanics, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita-city, Osaka, 565-0871, Japan.
| | - Ken Nakata
- Department of Health and Sports Science, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita-city, Osaka, 565-0871, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita-city, Osaka, 565-0871, Japan
| | - Tomoki Ohori
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita-city, Osaka, 565-0871, Japan
| | - Seira Sato
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita-city, Osaka, 565-0871, Japan
| | - Takehito Hirose
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita-city, Osaka, 565-0871, Japan
| | - Ryohei Uchida
- Department of Orthopaedic Surgery, Kansai Rosai Hospital, 3-1-69, Inaba-so, Amagasaki-city, Hyogo, 660-8511, Japan
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Nakagawa S, Hirose T, Ohori T, Yokoi H, Uchida R, Sahara W, Mae T. The process of bone union after arthroscopic bony Bankart repair in younger athletes with a subcritical glenoid defect: An advantage of remained large bone fragment. J Orthop Sci 2024; 29:115-121. [PMID: 36372678 DOI: 10.1016/j.jos.2022.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/13/2022] [Accepted: 10/21/2022] [Indexed: 11/12/2022]
Abstract
BACKGROUND The purpose of the present study was to investigate the bone union process after arthroscopic bony Bankart repair (ABBR) in shoulders with a subcritical glenoid defect of 13.5% or larger. METHODS Bone union process after ABBR performed from 2011 to 2018 were retrospectively investigated in 47 athletes younger than 30 years with a subcritical glenoid defect, who underwent CT at least twice postoperatively. The change of bone union between first CT within 6 months and final CT later than 6 months was investigated, especially noticing bone fragment size (≥7.5% versus <7.5%). RESULTS The mean period at first CT and at final CT was 4.1 ± 0.6 months (3-6 months) and 16.8 ± 11.6 months (7-71 months), respectively. From the first to final CT, among 15 shoulders with a small bone fragment (<7.5%), complete union increased from 4 shoulders (26.7%) to 8 shoulders (53.3%), while among 32 shoulders with a large bone fragment (≥7.5%), complete union increased from 15 shoulders (46.9%) to 25 shoulders (78.1%). On the other hand, while non-union or disappeared bone fragment was recognized in 8 shoulders (53.3%) with a small fragment and in 2 shoulders (6.3%) with a large fragment at first CT, it was solely recognized in 4 shoulders (26.7%) with a small fragment and in no shoulders with a large fragment at final CT. While postoperative glenoid fracture at the site of bone union was recognized in 7 shoulders, complete union was finally obtained after conservative treatment in 5 shoulders. So, final complete union was obtained in 9 (60%) of 15 shoulders with a small fragment and in 29 (90.6%) of 32 shoulders with a large fragment (p = 0.021). CONCLUSIONS In shoulders with a subcritical glenoid defect, when a large bone fragment (≥7.5%) was repaired, complete union rate was higher and complete union could be obtained earlier.
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Affiliation(s)
- Shigeto Nakagawa
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan.
| | - Takehito Hirose
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Tomoki Ohori
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Ryohei Uchida
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Wataru Sahara
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
| | - Tatsuo Mae
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, 2-2-3 Ukita, Kita-ku, Osaka, Osaka 530-0021, Japan
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Morita N, Hoshi M, Tezuka H, Ando T, Yoshida S, Sato F, Yokoi H, Ito H, Saito K. CD8+ Regulatory T Cells Induced by Lipopolysaccharide Improve Mouse Endotoxin Shock. Immunohorizons 2023; 7:353-363. [PMID: 37212786 PMCID: PMC10579971 DOI: 10.4049/immunohorizons.2200074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 05/03/2023] [Indexed: 05/23/2023] Open
Abstract
Sepsis is a systemic inflammatory disease caused by a bacterial infection that leads to severe mortality, especially in elderly patients, because of an excessive immune response and impaired regulatory functions. Antibiotic treatment is widely accepted as the first-line therapy for sepsis; however, its excessive use has led to the emergence of multidrug-resistant bacteria in patients with sepsis. Therefore, immunotherapy may be effective in treating sepsis. Although CD8+ regulatory T cells (Tregs) are known to have immunomodulatory effects in various inflammatory diseases, their role during sepsis remains unclear. In this study, we investigated the role of CD8+ Tregs in an LPS-induced endotoxic shock model in young (8-12 wk old) and aged (18-20 mo old) mice. The adoptive transfer of CD8+ Tregs into LPS-treated young mice improved the survival rate of LPS-induced endotoxic shock. Moreover, the number of CD8+ Tregs in LPS-treated young mice increased through the induction of IL-15 produced by CD11c+ cells. In contrast, LPS-treated aged mice showed a reduced induction of CD8+ Tregs owing to the limited production of IL-15. Furthermore, CD8+ Tregs induced by treatment with the rIL-15/IL-15Rα complex prevented LPS-induced body wight loss and tissue injury in aged mice. In this study, to our knowledge, the induction of CD8+ Tregs as novel immunotherapy or adjuvant therapy for endotoxic shock might reduce the uncontrolled immune response and ultimately improve the outcomes of endotoxic shock.
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Affiliation(s)
- Nanaka Morita
- Department of Disease Control and Prevention, Fujita Health University, Toyoake, Aichi, Japan
| | - Masato Hoshi
- Department of Disease Control and Prevention, Fujita Health University, Toyoake, Aichi, Japan
- Department of Informative Clinical Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Hiroyuki Tezuka
- Cellular Function Analysis, Research Promotion Headquarters, Fujita Health University, Toyoake, Aichi, Japan
| | - Tatsuya Ando
- Joint Research Laboratory of Clinical Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Sayaka Yoshida
- Department of Informative Clinical Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Fumiaki Sato
- Department of Informative Clinical Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Hiroyuki Yokoi
- Department of Informative Clinical Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Hiroyasu Ito
- Cellular Function Analysis, Research Promotion Headquarters, Fujita Health University, Toyoake, Aichi, Japan
| | - Kuniaki Saito
- Department of Disease Control and Prevention, Fujita Health University, Toyoake, Aichi, Japan
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Nakagawa S, Hirose T, Tsunematsu T, Ohori T, Yokoi H, Mae T, Yoneda M. Is preoperative glenoid defect size a reliable indicator of postoperative recurrence after arthroscopic Bankart repair in teenage competitive athletes? J Shoulder Elbow Surg 2022; 32:1165-1173. [PMID: 36584869 DOI: 10.1016/j.jse.2022.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/14/2022] [Accepted: 11/20/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND Being younger than 20 years of age at the time of arthroscopic Bankart repair (ABR) is known to be one of the most important risk factors for postoperative recurrence of instability. When deciding on the appropriate surgical approach, surgeons generally consider only the size of a critical glenoid defect, and most of them do not take into account factors such as the size of bone fragments and possible bone union after arthroscopic bony Bankart repair (ABBR). Therefore, this retrospective study aimed to clarify the risk factors for postoperative recurrence after ABR in teenage competitive athletes by focusing on glenoid rim morphologies and bone union. METHODS Participants were 115 teenage competitive athletes without a capsular injury who underwent primary ABR for chronic traumatic anterior instability and were followed up for a minimum of 2 years. Possible risk factors for postoperative recurrence were investigated by univariate and multivariate analysis. In shoulders with a glenoid defect and bone fragment, the influence of glenoid defect size and bone fragment size on bone union after ABBR was also investigated. RESULTS Postoperative recurrence was seen in 16 patients (13.9%). Regarding glenoid defect size, recurrence was seen in 1 (3.2%) of 31 shoulders with a glenoid defect smaller than 5% (including those with a normal glenoid), 15 (22.1%) of 68 shoulders with a glenoid defect of 5%-20%, and 0 (0%) of 16 shoulders with a glenoid defect of 20% or larger (P = .009). Regarding bone union, recurrence was seen in 4 (6.9%) of 58 shoulders with complete or partial bone union after ABBR and 8 (40%) of 20 shoulders with nonunion or disappearance of the bone fragment (P = .001). Regarding bone fragment size, recurrence was seen in 12 (20.7%) of 58 shoulders with a small or no bone fragment (<7.5%) and in 3 (8.6%) of 35 shoulders with a large bone fragment (≥7.5%; P = .154). Multivariate analysis identified non-union or disappearance of the bone fragment after ABBR as a significant risk factor for recurrence. Complete or partial bone union was seen in 25 (58.1%) of 43 shoulders with a small bone fragment (<7.5%) and 33 (94.3%) of 35 shoulders with a large bone fragment (≥7.5%; P < .001). CONCLUSIONS In teenage competitive athletes, bone union after ABBR affects postoperative recurrence after ABR, regardless of the preoperative glenoid defect size, and bone union rate after ABBR is significantly influenced by bone fragment size.
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Affiliation(s)
- Shigeto Nakagawa
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Osaka, Japan.
| | - Takehito Hirose
- Department of Orthopaedic Surgery, Daini Osaka Police Hospital, Osaka, Osaka, Japan
| | - Toshitaka Tsunematsu
- Department of Orthopaedic Surgery, Moriguchi Keijinkai Hospital, Moriguchi, Osaka, Japan
| | - Tomoki Ohori
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Osaka, Japan
| | - Tatsuo Mae
- Osaka Yukioka Medical University, Ibaraki, Osaka, Japan
| | - Minoru Yoneda
- Department of Orthopaedic Surgery, Kashiwa Tanaka Hospital, Kashiwa, Chiba, Japan
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Manna B, Yokoi H, Yamashita A, Sato S, Ohyama J, Kunitake M, Ida S. Infusion of Variable Chemical Structure to Tune Stacking among Metal‐Organic Layers in 2D Nano MOFs. Chemistry 2022; 28:e202202704. [DOI: 10.1002/chem.202202704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Biplab Manna
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Hiroyuki Yokoi
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Materials Science and Engineering Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Akihiro Yamashita
- Technical division Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Shota Sato
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Junya Ohyama
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Masashi Kunitake
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Shintaro Ida
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
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Manna B, Yokoi H, Yamashita A, Sato S, Ohyama J, Kunitake M, Ida S. Infusion of Variable Chemical Structure to Tune Stacking among Metal–Organic Layers in 2D Nano MOFs. Chemistry 2022. [DOI: 10.1002/chem.202202701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Biplab Manna
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Hiroyuki Yokoi
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Materials Science and Engineering Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Akihiro Yamashita
- Technical division Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Shota Sato
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Junya Ohyama
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Masashi Kunitake
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Shintaro Ida
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Faculty of Advanced Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
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Manna B, Yokoi H, Yamashita A, Sato S, Ohyama J, Kunitake M, Ida S. Infusion of Variable Chemical Structure to Tune Stacking among Metal‐Organic Layers in 2D Nano MOF. Chemistry 2022; 28:e202201665. [DOI: 10.1002/chem.202201665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Biplab Manna
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Hiroyuki Yokoi
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Materials Science and Engineering Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto, 860-8555 Japan
| | - Akihiro Yamashita
- Technical division Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto, 860-8555 Japan
| | - Shota Sato
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Junya Ohyama
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Masashi Kunitake
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
| | - Shintaro Ida
- Institute of Industrial Nanomaterials Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
- Department of Applied Chemistry and Biochemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo Ward Kumamoto 860-8555 Japan
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Nakagawa S, Hirose T, Uchida R, Yokoi H, Ohori T, Sahara W, Mae T. A Glenoid Defect of 13.5% or Larger Is Not Always Critical in Male Competitive Rugby and American Football Players Undergoing Arthroscopic Bony Bankart Repair: Contribution of Resultant Large Bone Fragment. Arthroscopy 2022; 38:673-681. [PMID: 34389413 DOI: 10.1016/j.arthro.2021.07.033] [Citation(s) in RCA: 6] [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] [Received: 12/04/2020] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To investigate bone union and postoperative recurrence after arthroscopic bony Bankart repair (ABBR) in male competitive rugby and American football players with a subcritical glenoid defect of ≥13.5% and to compare findings with those in players with a glenoid defect of <13.5%. METHODS Participants were male competitive rugby or American football players with a glenoid defect and bone fragment who underwent ABBR from July 2011 to December 2018 and were followed for a minimum of 2 years. We investigated the influence of glenoid defect and bone fragment size on bone union and postoperative recurrence after ABBR. RESULTS We included 45 rugby players and 35 American football players. A total of 38 shoulders were assigned to the small defect group (<13.5%) and 42 to the large defect group (≥13.5%). The complete bone union rate was 47.4% in the small defect group and 71.4% in the large defect group (P = .040), and postoperative recurrence was seen in 13 (34.2%) and 5 shoulders (11.9%), respectively (P = .030). In the small defect group, the bone fragment size was <7.5% in 30 shoulders and ≥7.5% in 8 shoulders; in comparison, the respective numbers were 12 and 30 shoulders in the large defect group, and large fragments (>7.5%) were significantly more common in this group (P < .001). The complete union rate was significantly higher in shoulders with a large fragment (≥7.5%) than in those with a small fragment (<7.5%; 78.9% versus 42.9%, respectively; P = .001). The recurrence rate was 33.3% in shoulders with a small fragment (<7.5%) and 10.5% in shoulders with a large fragment (≥7.5%; P = .017) and was significantly lower in shoulders with a complete union than in those without a complete union (6.3% versus 46.9%, respectively; P < .001). CONCLUSION The postoperative recurrence rate after ABBR was lower in male competitive rugby and American football players with a large glenoid defect (≥13.5%) than in those with a small glenoid defect (<13.5%) and might be associated with a higher rate of complete bone union of the resultant large bone fragment (≥7.5%). LEVEL OF EVIDENCE III, case-control study.
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Affiliation(s)
- Shigeto Nakagawa
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan.
| | - Takehito Hirose
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Ryohei Uchida
- Department of Orthopaedic Sports Medicine, Kansai Rosai Hospital, Hyogo, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Tomoki Ohori
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Wataru Sahara
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, Osaka, Japan
| | - Tatsuo Mae
- Department of Sports Medicine Biomechanics, Osaka University, Graduate School of Medicine, Osaka, Japan
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Inoue Y, Kino J, Ishiharada N, Sato M, Hatanaka S, Yokoi H, Shimada T, Sato S, Okamoto T, Kanemoto N. Preclinical safety profile of a liver-localized mitochondrial uncoupler: OPC-163493. EXCLI J 2022; 21:213-235. [PMID: 35221841 PMCID: PMC8859645 DOI: 10.17179/excli2021-4414] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/23/2021] [Indexed: 11/05/2022]
Abstract
Mitochondrial uncouplers (mUncouplers) are known to exhibit a variety of toxic effects in animals. Here we report a safety profile of an mUncoupler, OPC-163493, recently synthesized at Otsuka Pharmaceutical Co, Ltd, and its development as a therapeutic agent for treating diabetes. To understand the acute and subchronic toxicity of OPC-163493, single and repeated oral dose studies in rats, dogs, and monkeys were performed. In the rat studies, rigor mortis and increased body temperatures were observed in the high dose group. Focal necrosis, fatty change, and granular eosinophilic cytoplasm of the hepatocytes were also observed in the high dose group. In the dog studies, gastrointestinal manifestations were observed with decreased body weight and decreased food consumption in the high dose group. Necrotizing arteritis was observed in multiple organs as well as meningitis with hemorrhage in the brain. In the monkey studies, vomiting, decreased food consumption, and decreased locomotor activity were observed in the high dose group. Degeneration of the proximal convoluted tubules and the straight tubular epithelium, regeneration of the proximal tubular epithelium, and degeneration of the collecting tubular epithelium were observed. The target organs of OPC-163493 were liver, blood vessels, and kidney in rats, dogs, and monkeys, respectively. In rats, dogs, and monkeys, safety ratios were 100:1, 13:1, and 20:1, respectively, in terms of total exposure (AUC24h). These safety ratios showed clear separation between exposure to OPC-163493 in animals at NOAEL and the exposure at the effective dose in ZDF rats. This information should contribute to the drug development of new and effective mUncoupler candidates.
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Affiliation(s)
- Yuki Inoue
- Department of Drug Safety Research, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan,*To whom correspondence should be addressed: Yuki Inoue, Department of Drug Safety Research, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10 Kagasuno Kawauchi-cho, Tokushima, 771-0192, Japan, E-mail:
| | - Junichi Kino
- Product Strategy Team 1, Product Strategy & Intelligence Office, Regulatory Affairs Department, Otsuka Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Nobuya Ishiharada
- Department of Investigative Toxicology, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Makoto Sato
- Department of Drug Safety Research, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Suguru Hatanaka
- Department of Drug Metabolism and Pharmacokinetics, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Hiroyuki Yokoi
- Department of Drug Metabolism and Pharmacokinetics, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Takahiro Shimada
- Department of Drug Metabolism and Pharmacokinetics, Nonclinical Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Seiji Sato
- Medicinal Chemistry Research Laboratories, New Drug Research Division, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Takashi Okamoto
- Department of Lead Discovery Research, New Drug Research Division, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
| | - Naohide Kanemoto
- Department of Lead Discovery Research, New Drug Research Division, Otsuka Pharmaceutical Co., Ltd., Tokushima, Japan
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Solon E, Groseclose MR, Ho S, Tanaka K, Nakada N, Linehan S, Nishidate M, Yokoi H, Kaji H, Urasaki Y, Watanabe K, Ishida T, Komatsu R, Yoshida K, Yamazaki H, Saito K, Saito Y, Tanaka Y. Imaging Mass Spectrometry (IMS) for drug discovery and development survey: Results on methods, applications and regulatory compliance. Drug Metab Pharmacokinet 2021; 43:100438. [DOI: 10.1016/j.dmpk.2021.100438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/08/2021] [Accepted: 11/19/2021] [Indexed: 12/26/2022]
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Shiono Y, Matsuo H, Fujita H, Tanaka N, Ogasawara Y, Kawamura I, Katayama Y, Matsuo A, Kawase Y, Kakuta T, Takashima H, Yokoi H, Ohira H, Suwa S, Oguri M, Yamamoto F, Kubo T, Akasaka T, Shiono Y, Katayama Y, Hironori K, Kubo T, Akasaka T, Tanaka N, Yamashita J, Fujita H, Matsuo A, Matsuo H, Kawase Y, Kawamura I, Kakuta T, Hoshino M, Sugano T, Takashima H, Amano T, Yokoi H, Yamamoto Y, Nozaki Y, Machida M, Kobori M, Kikuchi T, Ohira H, Yoshino H, Ishiguro H, Wakabayashi Y, Kondo T, Terai H, Suwa T, Kimura T, Kawajiri T, Hirohata A, Uemura S, Neishi Y, Sakamoto T, Yamada M, Okeie K, Hishikari K, Oguri M, Uetani T, Saegusa T, Yamamoto F, Yamada M. Diagnostic Accuracy of Diastolic Fractional Flow Reserve for Functional Evaluation of Coronary Stenosis. JACC: Asia 2021; 1:230-241. [PMID: 36338166 PMCID: PMC9627917 DOI: 10.1016/j.jacasi.2021.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/28/2021] [Accepted: 07/08/2021] [Indexed: 01/10/2023]
Abstract
Background In the resting conditions, narrowing the window of coronary pressure measurements from the whole cardiac cycle to diastole improves diagnostic performance of coronary pressure–derived physiological index. However, whether this also applies to the hyperemic conditions has not yet been thoroughly evaluated. Objectives The purpose of this study was to assess whether diastolic fractional flow reserve (diastolic FFR) has better diagnostic performance in identifying ischemia-causing coronary lesions than conventional FFR in a prospective, multicenter, and independent core laboratory–based environment. Methods In this prospective multicenter registry at 29 Japanese centers, we compared the diagnostic performance of FFR, diastolic FFR, resting distal to aortic coronary pressure (Pd/Pa), and diastolic pressure ratio (dPR) using myocardial perfusion scintigraphy (MPS) as the reference standard in 378 patients with single-vessel coronary disease. Results Inducible myocardial ischemia was found on MPS in the relevant myocardial territory of the target vessel in 85 patients (22%). In the receiver-operating curve analyses, diastolic FFR had comparable area under the curve (AUC) compared with FFR (AUCdiastolic FFR: 0.66; 95% confidence interval [CI]: 0.58-0.73, vs AUCFFR: 0.66; 95% CI: 0.58-0.74, P = 0.624). FFR and diastolic FFR showed significantly larger AUCs than resting Pd/Pa (0.62; 95% CI: 0.54-0.70; P = 0.033 and P = 0.046) but did not show significantly larger AUCs than dPR (0.62; 95% CI: 0.55-0.70; P = 0.102 and P = 0.113). Conclusions Diastolic FFR showed a similar diagnostic performance to FFR as compared with MPS. This result reaffirms the use of FFR as the most accurate invasive physiological lesion assessment. (Diagnostic accuracy of diastolic fractional flow reserve (d-FFR) for functional evaluation of coronary stenosis; UMIN000015906)
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Uchida R, Shino K, Iuchi R, Tachibana Y, Yokoi H, Nakagawa S, Mae T. Anatomical Triple Bundle Anterior Cruciate Ligament Reconstructions With Hamstring Tendon Autografts: Tunnel Locations and 2-Year Clinical Outcomes. Arthroscopy 2021; 37:2891-2900. [PMID: 33887415 DOI: 10.1016/j.arthro.2021.03.070] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 03/28/2021] [Accepted: 03/30/2021] [Indexed: 02/06/2023]
Abstract
PURPOSE To anatomically clarify the location of the tunnel apertures created using the bony landmark strategy and to elucidate clinical outcomes after anatomic triple-bundle (ATB) anterior cruciate ligament (ACL) reconstruction. METHODS Thirty-two patients with unilateral ACL injury who had consented to undergo computed tomography (CT) at 3 weeks, as well as 2-year follow-up evaluation, were enrolled. At the time of surgery, remnant tissues were thoroughly cleared to create 2 femoral and 3 tibial tunnels inside the ACL attachment areas bordered by the bony landmarks. Two double-looped semitendinosus tendon autografts were prepared and fixed on the femur with two EndoButton-CLs and secured to the tibia with pullout sutures and plates with 10-20N of tension. The location of the tunnel aperture areas was assessed using 3-dimensional CT images, and 2-year postoperative clinical outcomes were evaluated. RESULTS The CT evaluation showed 100% of the femoral tunnel aperture area and at least 79% of the tibial tunnel aperture area were located inside the anatomic attachment areas. Thirty patients were available for clinical evaluation. The International Knee Documentation Committee subjective assessment showed all of the patients were classified as "normal" or "nearly normal." Lachman and pivot-shift tests were negative in 100% and 93%, respectively. The mean side-to-side difference of anterior laxity at the maximum manual force with a KT-1000 Knee Arthrometer was 0.7 ± 0.7 mm, ranging from 0 to 2 mm. CONCLUSION In ATB ACL reconstructions with hamstring tendon grafts, the tunnels can be created in proper locations using the arthroscopically-identifiable bony landmarks. Moreover, ATB ACL reconstruction with hamstring tendon grafts via the proper tunnels result in consistently satisfactory clinical outcomes. LEVEL OF EVIDENCE Level IV, case series.
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Affiliation(s)
- Ryohei Uchida
- Department of Sports Orthopaedic Center, Yukioka Hospital, Osaka; Department of Orthopaedic Sports Medicine, Kansai Rosai Hospital, Hyogo.
| | - Konsei Shino
- Department of Sports Orthopaedic Center, Yukioka Hospital, Osaka
| | - Ryo Iuchi
- Department of Sports Orthopaedic Center, Yukioka Hospital, Osaka
| | - Yuta Tachibana
- Department of Sports Orthopaedic Center, Yukioka Hospital, Osaka
| | - Hiroyuki Yokoi
- Department of Sports Orthopaedic Center, Yukioka Hospital, Osaka
| | - Shigeto Nakagawa
- Department of Sports Orthopaedic Center, Yukioka Hospital, Osaka
| | - Tatsuo Mae
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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Okamoto M, Kawasaki M, Okura T, Ochiai S, Yokoi H. Comparison of accuracy of cup position using portable navigation versus alignment guide in total hip arthroplasty in supine position. Hip Int 2021; 31:492-499. [PMID: 32126836 DOI: 10.1177/1120700020908788] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Accelerometer-based portable navigation systems in supine total hip arthroplasty (THA) have been developed, but there are no reports on the accuracy of cup placement. We aimed to investigate and compare the accuracy of the accelerometer-based portable navigation system versus the acetabular alignment guide placed on the pelvis in THA using the direct anterior approach (DAA). Both devices tracked changes in the pelvic position. METHODS In this single-centre, retrospective study, we reviewed 115 hips in 113 patients who underwent primary THA via the DAA using an accelerometer-based portable navigation system in the supine position (portable navigation group) and 106 hips in 101 patients who underwent THA using an acetabular alignment guide (alignment guide group) as controls. Hips were evaluated postoperatively using computed tomography to measure cup orientation. The accuracy of cup orientation was compared between the 2 groups. RESULTS Absolute values of inclination error were 3.1° ± 2.2° and 2.9° ± 2.3° (p = 0.708) in the portable navigation and alignment guide groups and those of anteversion error were 2.8° ± 2.3° and 3.7° ± 2.7°, respectively (p = 0.005). The number of cups placed within 10° of error was 98.3% and 96.2% in the portable navigation and alignment guide groups, respectively (p = 0.304). The portable navigation group had significantly more hips (72.2%) placed within a 5° margin of error than did the alignment guide group (56.6%) (p = 0.016). CONCLUSION High accuracy in cup placement was achieved using accelerometer-based portable navigation in supine THA. Using a navigation system may contribute to improved long-term outcomes.
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Affiliation(s)
- Masanori Okamoto
- Department of Orthopaedic Surgery, Aichi Koseiren Konan Kosei Hospital, Konan, Aichi, Japan
| | - Masashi Kawasaki
- Department of Orthopaedic Surgery, Aichi Koseiren Konan Kosei Hospital, Konan, Aichi, Japan
| | - Toshiaki Okura
- Department of Orthopaedic Surgery, Aichi Koseiren Konan Kosei Hospital, Konan, Aichi, Japan
| | - Satoshi Ochiai
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Surgery, Aichi Koseiren Konan Kosei Hospital, Konan, Aichi, Japan
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Kawamoto A, Furukawa Y, Fujita Y, Kobayashi S, Tobita K, Yamaguchi J, Shimizu W, Takagi G, Matsumura H, Murata N, Nakamura M, Kitano I, Yokoi H, Azuma N, Kozuki A, Obara H, Furukawa M, Sietsema W, Takagi H, Wang J, Bartel R, Losordo D. Honedra® (CLBS12) autologous CD34+ cells improve outcomes in patients with Buerger’s disease. Cytotherapy 2021. [DOI: 10.1016/s146532492100390x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kuramitsu S, Matsuo H, Takashima H, Yokoi H, Tanaka N. Three-year outcomes after deferral of revascularization based on instantaneous wave-free ratio or fractional flow reserve: insights from the J-CONFIRM Registry. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1402] [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
The safety of deferral of revascularization based on instantaneous wave-free ratio (iFR) is established in randomized controlled trials. However, there is little data regarding long-term outcomes after deferral of revascularization based on iFR in real-world practice.
Purpose
We sought to assess clinical outcomes after deferral of revascularization based on iFR in clinical practice as compared with those based on fractional flow reserve (FFR).
Methods
This is a post hoc analysis of the J-CONFIRM registry (long-term outcomes of Japanese patients with deferral of coronary intervention based on fractional flow reserve in multicenter registry), in which 1262 patients with 1447 lesions deferred the revascularization based on FFR. Of these, both FFR and iFR were measured in 399 patients with 452 lesions. The patients were classified into the two groups: the iFR group (iFR >0.89; 308 patients with 348 lesions) and the FFR group (FFR >0.80; 740 patients with 855 lesions). The primary study endpoint was the 3-year target vessel failure (TVF) including cardiac death, target-vessel related myocardial infarction (TVMI), and clinically driven target vessel revascularization (CDTVR).
Results
Mean iFR was 0.96±0.04 in the iFR group. Mean FFR was significantly lower in the iFR group than in the FFR group (0.87±0.05 vs. 0.89±0.05, p=0.002). The iFR group included 35 lesions (11.4%) with FFR ≤0.80. At 3 years, the rate of TVF on a lesion basis were not significantly different between the iFR and FFR groups (8.8% vs. 6.1%, p=0.10), whereas CDTVR rate was significantly higher in the iFR group than in the FFR group (8.5% vs. 5.3%, p=0.044). Cardiac death and TVMI on a patient basis rarely occurred in both groups during the 3-year follow-up (0.33% vs. 0.77%, p=0.47; 0.66% vs. 0.56%, p=0.85, respectively).
Conclusion
At 3 years, TVF rate in deferred lesions was numerically higher in the iFR group than in the FFR group, driven by a higher rate of CDTVR. However, cardiac death and TVMI was very rare in both groups, highlighting the safety of both iFR- and FFR-based deferral of revascularization in daily practice.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | | | | | - H Yokoi
- Fukuoka Sanno Hospital, Fukuoka, Japan
| | - N Tanaka
- Tokyo Medical University Hachioji Medical Center, Tokyo, Japan
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Yokoi H. Paclitaxel-coated Zilver PTX drug-eluting stent treatment does not result in increased long-term all-cause mortality compared to uncoated devices from Japan post-market surveillance study. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2379] [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
Purpose
Favorable long-term outcomes with the Zilver PTX drug-eluting stent (DES) in treating patients with femoropopliteal lesions have been demonstrated. A multicenter, prospective, post-market surveillance study (PMS) in Japan evaluated this DES in a real-world patient population. Recently, meta-analysis that grouped both DES and drug-coated balloons (DCB) together indicated a higher incidence of late all-cause mortality for paclitaxel- based devices compared to uncoated balloon or bare-metal stent (BMS) at 2 years up to 5 years. To evaluate the long-term safety of the Zilver PTX DES, compared with BMS using Japan-PMS study.
Methods
The Japan DES PMS had no exclusion criteria and enrolled consecutive patients with symptomatic PAD involving the above-the-knee femoropopliteal arteries. Safety and effectiveness of the DES was evaluated in real-world patients with complex femoropopliteal artery lesions through 5 years. Follow-up in the study is complete. The concurrent Japan BMS PMS also had no exclusion criteria and enrolled consecutive patients with symptomatic PAD involving the above-the-knee femoropopliteal arteries. Patients who were enrolled in the BMS study but who also had a DES placed (n=18) were excluded from the current analysis. Follow-up in the BMS study was only required through 3 years and is complete.
Results
The Japan DES PMS enrolled 904 DES patients, and the Japan BMS PMS enrolled 190 BMS patients. In the DES group, there were 127 deaths through 3 years and 186deaths through 5 years. In the BMS group, there were 22 deaths through 3 years. Through 3 years, the risk of mortality was 15.7% for DES group and 15.3% for BMS group. Through 5 years, the risk of mortality was 25.8% for the DES group. There was no difference in mortality between the two groups (log-rank p=0.92).The Cox proportional hazards model revealed that CLI (p<0.0001), age (p<0.0001), gender (p=0.001), renal failure (p<0.0001) were significantly associated with mortality. Hypercholesterolemia (p=0.004) was associated with lower risk of mortality. Treatment with Zilver PTX (p=0.49) was not associated with mortality. In the covariate analysis of paclitaxel dose, the significant factors were identical to the treatment analysis, and there was no association or trend of paclitaxel dose (p=0.07) with mortality.
Conclusion
Analyses of the paclitaxel-coated Zilver PTX DES utilizing patient-level data from the Japan PMS demonstrated no increase in long-term all-cause mortality. The 5-year results from this real-world, all-comers study continue to show positive long-term outcomes and demonstrate the benefit of the Zilver PTX DES across a broad patient population.
Funding Acknowledgement
Type of funding source: Private company. Main funding source(s): COOK
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Affiliation(s)
- H Yokoi
- Fukuoka Sanno Hospital, Cardiovascular Medicine, Fukuoka, Japan
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Tyagi A, Kar KK, Yokoi H. Atomically dispersed Ni/NixSy anchored on doped mesoporous networked carbon framework: Boosting the ORR performance in alkaline and acidic media. J Colloid Interface Sci 2020; 571:285-296. [DOI: 10.1016/j.jcis.2020.03.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/09/2020] [Accepted: 03/11/2020] [Indexed: 12/21/2022]
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Yokoi H, Take Y, Uchida R, Magome T, Shimomura K, Mae T, Okamoto T, Hanai T, Chong Y, Sato S, Hikida M, Nakata K. Vibration acceleration promotes endochondral formation during fracture healing through cellular chondrogenic differentiation. PLoS One 2020; 15:e0229127. [PMID: 32134943 PMCID: PMC7058294 DOI: 10.1371/journal.pone.0229127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 01/30/2020] [Indexed: 02/07/2023] Open
Abstract
Vibration acceleration through whole body vibration has been reported to promote fracture healing. However, the mechanism responsible for this effect remains unclear. Purpose of this study was to determine whether vibration acceleration directly affects cells around the fracture site and promotes endochondral ossification. Four-week-old female Wistar Hannover rats were divided into two groups (vibration [V group] and control [C group]). The eighth ribs on both sides were cut vertically using scissors. From postoperative day 3 to 11, vibration acceleration using Power Plate® (30 Hz, low amplitude [30-Low], 10 min/day) was applied in the V group. Mature calluses appeared earlier in the V group than in the C group by histological analysis. The GAG content in the fracture callus on day 6 was significantly higher in the V group than in the C group. The mRNA expressions of SOX-9, aggrecan, and Col-II in the fracture callus on day 6 and Col-X on day 9 were significantly higher in the V group than in the C group. For in vitro analysis, four different conditions of vibration acceleration (30 or 50 Hz with low or high amplitude [30-Low, 30-High, 50-Low, and 50-High], 10 min/day) were applied to a prechondrogenic cell (ATDC5) and an undifferentiated cell (C3H10T1/2). There was no significant difference in cell proliferation between the control and any of the four vibration conditions for both cell lines. For both cell lines, alcian blue staining was greater under 30-Low and 50-Low conditions than under control as well as 30-High and 50-High conditions on days 7 and 14. Vibration acceleration under 30-L condition upregulated chondrogenic gene expressions of SOX-9, aggrecan, Col-II, and Col-X. Low-amplitude vibration acceleration can promote endochondral ossification in the fracture healing in vivo and chondrogenic differentiation in vitro.
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Affiliation(s)
- Hiroyuki Yokoi
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Orthopedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasuhiro Take
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Orthopedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ryohei Uchida
- Department of Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Takuya Magome
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kazunori Shimomura
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Orthopedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tatsuo Mae
- Department of Orthopedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tomoko Okamoto
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tatsuhiro Hanai
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yang Chong
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Seira Sato
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Orthopedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Minami Hikida
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ken Nakata
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Orthopedic Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
- * E-mail:
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NISHIGUCHI Y, Kuwabara T, Fujimoto D, Kanki T, Hata Y, Yokoi H, Izumi Y, Kakizoe Y, Mochizuki N, Mukoyama M. SUN-004 Osteocrin, a bone-originated humoral factor, exerts a renoprotective role in ischemia-reperfusion injury in mice. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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22
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Nakagawa S, Uchida R, Yokoi H, Sahara W, Mae T. Changes of Bipolar Bone Defect Size After Arthroscopic Bankart Repair for Traumatic Anterior Shoulder Instability: Evaluation Using a Scoring System and Influence on Postoperative Recurrence. Orthop J Sports Med 2019; 7:2325967119885345. [PMID: 31807605 PMCID: PMC6880029 DOI: 10.1177/2325967119885345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background The combination of a glenoid defect and a Hill-Sachs lesion in shoulders with traumatic anterior instability has been termed bipolar bone loss, and the preoperative size of these lesions has been reported to influence postoperative recurrence of instability after arthroscopic Bankart repair. Purpose To investigate the influence of postoperative bipolar bone defect size on postoperative recurrence of instability. Study Design Cohort study; Level of evidence, 3. Methods A total of 64 male collision/contact athletes (69 shoulders) were evaluated for a minimum of 2 years after surgery, and the pre- and postoperative sizes of both lesions (glenoid defect and Hill-Sachs) were evaluated retrospectively with 3-dimensional computed tomography. The sports played by the athletes included rugby (n = 28 shoulders), American football (n = 24 shoulders), and other collision/contact sports (n = 17 shoulders). Glenoid defects and Hill-Sachs lesions were classified into 5 size categories and assigned scores from 0 (no defect) to 4 (very large defect). Patients were then classified according to the total score (sum of the scores for both lesions). The influence of pre- and postoperative bipolar bone defect sizes on recurrence of instability was investigated by using the total scores for bipolar bone defects. The influence of postoperative glenoid morphology (normal preoperative glenoid, preoperative glenoid erosion, bone union after arthroscopic bony Bankart repair [ABBR], or nonunion after ABBR) was also investigated, as well as changes in shoulders with a preoperative off-track Hill-Sachs lesion. Results Of 69 shoulders, 15 (21.7%) developed recurrent instability after surgery. The postoperative recurrence rate was 0% in shoulders with a total score ≤1, while the recurrence rate was consistently higher in shoulders with a total score ≥2 at both pre- and postoperative evaluation (mean, 28.8% and 32.6%, respectively). Postoperative recurrence was uncommon when there was a normal preoperative glenoid or bone union after ABBR, while it was frequent in shoulders with preoperative glenoid erosion or shoulders with nonunion after ABBR and a total score ≥2. An off-track lesion was recognized in 9 shoulders preoperatively. It was transformed to on-track lesions in 4 of the 5 shoulders showing bone union after ABBR, and there was no recurrence in the 5 shoulders with bone union. In contrast, postoperative recurrence of instability occurred in 3 of the 4 shoulders without bone union. Conclusion Postoperative recurrence was influenced by the pre- and postoperative size of bipolar bone defects. Recurrence was uncommon if bone union was achieved after ABBR, even if there had been an off-track lesion preoperatively.
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Affiliation(s)
- Shigeto Nakagawa
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Ryohei Uchida
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Sports Medicine, Yukioka Hospital, Osaka, Japan
| | - Wataru Sahara
- Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Tatsuo Mae
- Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Suita, Japan
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23
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Taniguchi T, Li S, Nurdiwijayanto L, Kobayashi Y, Saito T, Miyata Y, Obata S, Saiki K, Yokoi H, Watanabe K, Taniguchi T, Tsukagoshi K, Ebina Y, Sasaki T, Osada M. Tunable Chemical Coupling in Two-Dimensional van der Waals Electrostatic Heterostructures. ACS Nano 2019; 13:11214-11223. [PMID: 31580052 DOI: 10.1021/acsnano.9b04256] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Heterostructures of two-dimensional (2D) atomic crystals provide fascinating molecular-scale design elements for emergent physical phenomena and functional materials, as integrating distinct monolayers into vertical heterostructures can afford coupling between disparate properties. However, the available examples have been limited to either van der Waals (vdW) or electrostatic (ES) heterostructures that are solely composed of noncharged and charged monolayers, respectively. Here, we propose a "vdW-ES heterostructure" chemical design in which charge-neutral and charged monolayer-building blocks with highly disparate chemical and physical properties are conjugated vertically through asymmetrically charged interfaces. We demonstrate vdW-ES heteroassembly of semiconducting MoS2 and dielectric Ca2Nb3O10- (CNO) monolayers using an amphipathic molecular starch, resulting in the emergence of trion luminescence observed at the lowest energy among MoS2-related materials, probably due to interfacial confinement effects given by vdW-ES dual interactions. In addition, interface engineering leads to tailored exciton of the vdW/ES heterostructures owing to the pronounced dielectric proximity effects, bringing an intriguing interlayer chemistry to modify 2D materials. Furthermore, the current approach was successfully extended to create a graphene/CNO heterostructure, which verifies the versatility of the preparative method.
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Affiliation(s)
- Takaaki Taniguchi
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Shisheng Li
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Leanddas Nurdiwijayanto
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Yu Kobayashi
- Department of Physics , Tokyo Metropolitan University , Hachioji , Tokyo 192-0397 , Japan
| | - Tetsuki Saito
- Department of Physics , Tokyo Metropolitan University , Hachioji , Tokyo 192-0397 , Japan
| | - Yasumitsu Miyata
- Department of Physics , Tokyo Metropolitan University , Hachioji , Tokyo 192-0397 , Japan
| | - Seiji Obata
- Department of Complexity Science and Engineering , Graduate School of Frontier Sciences, The University of Tokyo , Kashiwa , Chiba 277-8561 , Japan
| | - Koichiro Saiki
- Department of Complexity Science and Engineering , Graduate School of Frontier Sciences, The University of Tokyo , Kashiwa , Chiba 277-8561 , Japan
| | - Hiroyuki Yokoi
- Faculty of Advanced Science and Technology , Kumamoto University , Kumamoto 860-8555 , Japan
| | - Kenji Watanabe
- Research Center for Functional Materials , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Takashi Taniguchi
- Research Center for Functional Materials , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Kazuhito Tsukagoshi
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Yasuo Ebina
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Takayoshi Sasaki
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
| | - Minoru Osada
- World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science(NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan
- Institute of Materials and Systems for Sustainability , Nagoya University , Furocho, Chikusa-ku, Nagoya 464-8603 , Japan
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Tsujimura T, Iida O, Takahara M, Yamauchi Y, Shintani Y, Sugano T, Yamamoto Y, Kawasaki D, Yokoi H, Miyamoto A, Mano T. P4704The efficacy of intravascular ultrasound for patients with peripheral artery diseases presenting aorto-iliac artery disease. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.1085] [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
The use of intravascular ultrasound (IVUS) promotes better clinical outcomes for intervention in complex lesions. However, the data demonstrating whether use of IVUS improves primary patency following stenting for aorto-iliac lesions in patients with peripheral artery disease (PAD) are limited.
Purpose
The purpose of the current study was to investigate the impact of IVUS use on primary patency 12 months after stent implantation for aorto-iliac lesions.
Methods
We analyzed a clinical database of the OMOTENASHI registry (Observational prospective Multicenter registry study on Outcomes of peripheral arTErial disease patieNts treated by AngioplaSty tHerapy in aortoIliac artery), registering symptomatic PAD patients (Rutherford category 2, 3, or 4) undergoing endovascular therapy for aorto-iliac lesions between January 2014 and April 2016 in Japan. The current study analyzed 803 patients who underwent self-expandable stent implantation at 61 centers with the institutional volume known. The primary endpoint was 12-month restenosis, defined as ≥50% stenosis on computed tomography or angiography, or a peak systolic velocity ratio ≥2.5 on duplex ultrasound. When treatment strategies, endovascular procedures and clinical outcomes were compared between the patients treated with IVUS use and those treated without IVUS use, the propensity score matching was performed to minimize the inter-group difference in baseline characteristics.
Results
A total of 545 patients (67.9%) underwent IVUS-supported stent implantation. Patients treated with IVUS use had a lower prevalence of regular dialysis, whereas they had a higher prevalence of TASC II class D and chronic total occlusion. In patients treated with IVUS use, carbon dioxide contrast agent were more often used, and 0.035-inch guidewire was less frequently selected. Implanted stents in these patients were longer and smaller in diameter. The propensity score matching extracted 138 pairs, with no remarkable intergroup difference in baseline characteristics. Procedure time ≤1 hour was less frequent in patients treated with IVUS use; their radiation time was longer. Endovascular strategies, as well as postoperative medication were not significantly different between patients with and without IVUS use. The 12-month restenosis risk was not significantly different between patients with and without IVUS use (10.2% [6.9 to 14.9%] versus 10.3% [5.4 to 18.6%], P=0.99).
Conclusion
IVUS use in aorto-iliac stenting for patients with PAD was not associated with primary patency at 12 months.
Acknowledgement/Funding
None
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Affiliation(s)
- T Tsujimura
- Kansai Rosai Hospital, Cardiovascular Center, Amagasaki, Japan
| | - O Iida
- Kansai Rosai Hospital, Cardiovascular Center, Amagasaki, Japan
| | - M Takahara
- Osaka University Graduate School of Medicine, Department of Metabolic Medicine, Osaka, Japan
| | - Y Yamauchi
- Takatsu General Hospital, Cardiovascular Center, Kawasaki, Japan
| | - Y Shintani
- Shin-Koga Hospital, Department of Cardiology, Fukuoka, Japan
| | - T Sugano
- Yokohama City University Hospital, Department of Cardiovascular Medicine, Yokohama, Japan
| | - Y Yamamoto
- Iwaki Kyoritsu General Hospital, Department of Cardiovascular Medicine, Fukushima, Japan
| | - D Kawasaki
- Morinomiya Hospital, Cardiovascular Division, Department of Internal Medicine, Osaka, Japan
| | - H Yokoi
- Fukuoka Sanno Hospital, Cardiovascular Center, Fukuoka, Japan
| | - A Miyamoto
- Takatsu General Hospital, Cardiovascular Center, Kawasaki, Japan
| | - T Mano
- Kansai Rosai Hospital, Cardiovascular Center, Amagasaki, Japan
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25
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Okamoto M, Namba J, Kuriyama K, Miyamura S, Yokoi H, Yamamoto K. Surgical technique in tension band wiring method for selected comminuted olecranon fractures. Eur J Orthop Surg Traumatol 2019; 30:237-242. [PMID: 31538271 DOI: 10.1007/s00590-019-02551-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 09/10/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND The use of tension band wiring (TBW) for comminuted olecranon fractures is less recommendable these days. However, some experts preferentially apply TBW to comminuted fractures resulting in favorable outcomes. We here present the surgical technique using TBW with eyelet and absorbable pins for selected comminuted olecranon fractures and review the clinical and radiographic outcomes. METHODS Twenty-four surgically treated patients with Colton Group 2C or 2D olecranon fractures in focus on the intermediate fragment (IMF) were enrolled. IMFs were primarily fixed with buried bioabsorbable poly-L-lactic acid pins followed by definitive fixation of the olecranon process with TBW with eyelet. The adequacy of the reconstructed notch was especially estimated by parameters on radiographs using digital imaging software. RESULTS The average follow-up was 30 months (10 to 86 months). All 24 fractures achieved union, and the maintenance of the articular curvature was confirmed according to statistical analysis on radiographs. The average elbow flexion was 135.1° (range 100° to 145°), and the average elbow extension was - 4.8° (range - 20° to 10°). The mean Mayo Elbow Performance score was 97.3 points (range 80 to 100 points). No cases of pin migration, infection, nerve problem, heterotrophic ossification, or secondary osteoarthritis were observed. CONCLUSIONS For selected comminuted olecranon fractures, TBW with the eyelet pins and biodegradable pins could yield satisfactory clinical and radiographic outcomes.
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Affiliation(s)
- Michio Okamoto
- Department of Orthopaedic Surgery, Yao Municipal Hospital, 1-3-1 Ryugecho, Yao, Osaka, 581-0069, Japan.
| | - Jiro Namba
- Department of Orthopaedic Surgery, Hoshigaoka Medical Center, 4-8-1 Hoshigaoka, Hirakata, Osaka, 573-8511, Japan
| | - Kohji Kuriyama
- Department of Orthopaedic Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-0055, Japan
| | - Satoshi Miyamura
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroyuki Yokoi
- Department of Orthopaedic Surgery, Yukioka Hospital, 2-2-3, Ukita, Kita-ku, Osaka, Osaka, 565-0871, Japan
| | - Koji Yamamoto
- Yamamoto Orthopaedic Clinic, 2-16-3 Yuhigaoka, Toyonaka, Osaka, 561-0864, Japan
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26
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Yokoi H, Osaki K, Kato Y, Toda N, Ishii A, Mori K, Mori K, Kasahara M, Mukoyama M, Yanagita M. SUN-143 MATRIX METALLOPROTEINASE-10 (MMP-10) IS A KEY MOLECULE IN ALDOSTERONE-INDUCED GLOMERULAR INJURY IN SYSTEMIC GUANYLYL CYCLASE-A KNOCKOUT MICE. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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27
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Shino K, Mae T, Uchida R, Yokoi H, Ohori T, Tachibana Y. Anatomical rectangular tunnel ACL reconstruction with a bone-patellar tendon-bone graft: its concept, indication and efficacy. Ann Joint 2019. [DOI: 10.21037/aoj.2019.01.04] [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: 11/06/2022]
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28
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Yokoi H, Kasahara Y, Obika S, Doi T, Kamada H. Development of a detection method for antisense oligonucleotides in mouse kidneys by matrix-assisted laser desorption/ionization imaging mass spectrometry. Rapid Commun Mass Spectrom 2018; 32:1984-1990. [PMID: 30152908 DOI: 10.1002/rcm.8274] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE Oligonucleotide therapeutics have recently gained much attention, but its pharmacokinetic evaluation methods are still not sufficient, and, in particular, more tools are needed to evaluate their tissue distribution and metabolites. We developed a matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS)-based method to evaluate the tissue distribution of oligonucleotide therapeutics. METHODS We used an antisense oligonucleotide containing locked nucleic acids (LNA-A). Various washing protocols were examined using mouse kidney homogenate sections. Next, we applied a two-step matrix preparation strategy. As a first step, 3-hydroxypicolinic acid (3-HPA) matrix containing citrate and amines was sprayed using an airbrush and subsequently 3-HPA matrix containing citrate only was sprayed using the ImagePrep. Finally, kidney sections prepared from LNA-A-dosed mice were treated with our optimized method and analyzed with MALDI-IMS. RESULTS The selected washing method made it possible to detect LNA-A with MALDI-IMS and, furthermore, our developed matrix pretreatment method enhanced signal intensity approximately two-fold. MALDI-IMS revealed that LNA-A localized in a portion presumed to be the renal cortex. We also obtained information on LNA-A metabolites, which showed the same distribution profile as LNA-A in kidneys. CONCLUSIONS This study shows that MALDI-IMS can be applied to evaluate the tissue distribution of oligonucleotide therapeutics. Our method can evaluate the tissue distribution along with metabolites and has the potential to help the development of novel oligonucleotide therapeutics.
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Affiliation(s)
- Hiroyuki Yokoi
- Otsuka Pharmaceutical Co., Ltd, Tokushima Research Institute, Tokushima, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Yuya Kasahara
- National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Satoshi Obika
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
- National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Takefumi Doi
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Haruhiko Kamada
- National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
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29
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Affiliation(s)
- H Yokoi
- Fukuoka Sanno Hospital, Cardiovascular Medicine, Fukuoka, Japan
| | - E Oda
- AC Medical Inc., Tokyo, Japan
| | - K Kaneko
- Medical Data Vision Co., Ltd., Tokyo, Japan
| | - H Matsuo
- Daiichi Sankyo Co., Ltd., Tokyo, Japan
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30
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Affiliation(s)
- Y Nishikawa
- Department of Clinical Oncology, Kyoto University Hospital, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Department of Health Informatics, Kyoto University School of Public Health, Yoshida-Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - H Yokoi
- Department of Nephrology, Graduate School of Medicine, Kyoto University, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - T Sakurai
- Department of Diagnostic Pathology, Kyoto University Hospital, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - T Horimatsu
- Department of Clinical Oncology, Kyoto University Hospital, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - S Miyamoto
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
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31
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Abstract
Summary
Objectives:
We extracted index terms related to diseases recorded in hospital discharge summaries and examined the capability of the vector space model to select a suitable diagnosis with these terms.
Methods:
By morphological analysis, we extracted index terms and constructed an original dictionary for the discharge summary analysis. We chose 125 different DPC (Japanese DRG system) codes for the diseases, each of which had more than 20 cases. We divided them into two groups. One group consisted of 5927 cases from 2004 fiscal year and was used to generate the document vector space according to the DPC. The other group of 3187 cases was collected to verify the automatic DPC selection by using data from 2005 fiscal year. The top 200 extracted index terms for each disease were used to calculate the weight of each disease.
Results:
The DPC code obtained by the calculated similarity was compared with the original codes of patients for 125 DPCs of 3187 cases. Eighty percent of the cases matched the diagnosis of the DPC (first six digits) and 56% of the cases completely matched all 14 digits of the DPC.
Conclusions:
We demonstrated that we could extract suitable terms for each disease and obtain characteristics, such as the diagnosis, from the calculated vectors. This technique can be used to measure the qualification of discharge summaries and to integrate discharge summaries among different facilities. By the text mining technique, we can characterize the contents of electronic discharge summaries and deduce diagnoses with the data.
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Yokoi H, Mae T, Iuchi R, Take Y, Tachibana Y, Shimomura K, Ohori T, Shino K, Yoshikawa H, Nakata K. Novel flat and wide meniscal repair material improves the ultimate load of knot breakage in a porcine trans-capsular meniscal repair model. J Exp Orthop 2017; 4:41. [PMID: 29260438 PMCID: PMC5736508 DOI: 10.1186/s40634-017-0114-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/30/2017] [Indexed: 11/10/2022] Open
Abstract
Background In the meniscal repair procedures, a high ultimate load capacity and low cyclic creep at the repair site are favorable and lead to good biological incorporation of the tear site after surgery. Previous biomechanical tensile tests of the meniscal sutures have identified the suture knot as the weakest point. We hypothesized that the strength of a suture knot depends on the suture shape, and therefore, we compared three differently shaped suture materials composed of the same material and quantity per length. The purpose of this study was to determine whether a novel flat and wide repair material (FWRM), which consists of braided multi-threads that are cross-sectionally flat and wide, improves the ultimate load of knot breakage in a biomechanical experiment using a porcine trans-capsular meniscal repair model. Methods Eighteen fresh-frozen porcine knees (n = 6 in each group) were used. A longitudinal tear in the middle segment of the medial meniscus was created and repaired with a trans-capsular inside-out method using the following suture materials: No. 2–0 braided polyester conventional suture, hollow suture, and FWRM. After the separation of the inner segment of the meniscus with leaving, the suture stability of the repaired menisci was biomechanically analyzed with a video camera system for widening after a cyclic load between 5 and 20 N was applied 300 times. Ultimate failure load and stiffness at 5 mm/ min were also analyzed. Results We found no significant difference in suture widening after cyclic load tests [conventional suture, mean 0.51 mm (S.D. 0.39 mm); hollow suture, mean 0.23 mm (S.D. 0.11 mm); and FWRM, mean 0.54 mm (S.D. 0.08 mm)]. The failure mode in all specimens was knot breakage. Compared with those of the other groups, the ultimate failure load of FWRM was statistically significantly higher in the load-to-failure tests (conventional suture, mean 58.8 N [S.D. 8.25 N]; hollow suture, mean 79.4 N [S.D. 10.2 N]; and FWRM, mean 97.4 N [S.D. 3.65 N]; p < 0.05). Conclusion FWRM improves the ultimate load of knot breakage without altering stability. This material may contribute to safe and stable meniscus repair.
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Affiliation(s)
- Hiroyuki Yokoi
- Medicine for Sports and Performing Arts, Department of Health and Sports Science, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Tatsuo Mae
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Ryo Iuchi
- Sports Orthopaedic Surgery Center, Yukioka Hospital, 2-2-3, Ukita, Kita-ku, Osaka, Osaka, 530-0021, Japan
| | - Yasuhiro Take
- Medicine for Sports and Performing Arts, Department of Health and Sports Science, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Yuta Tachibana
- Sports Orthopaedic Surgery Center, Yukioka Hospital, 2-2-3, Ukita, Kita-ku, Osaka, Osaka, 530-0021, Japan
| | - Kazunori Shimomura
- Medicine for Sports and Performing Arts, Department of Health and Sports Science, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Tomoki Ohori
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Konsei Shino
- Sports Orthopaedic Surgery Center, Yukioka Hospital, 2-2-3, Ukita, Kita-ku, Osaka, Osaka, 530-0021, Japan
| | - Hideki Yoshikawa
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Ken Nakata
- Medicine for Sports and Performing Arts, Department of Health and Sports Science, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, Osaka, 565-0871, Japan.
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Yokoi H. P5212The Zilver PTX Japanese post-market surveillance study of paclitaxel-eluting stents: 3 year results of the diabetic and in-stent restenosis subgroups. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H. Yokoi
- Fukuoka Sanno Hospital, Cardiovascular Medicine, Fukuoka, Japan
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Uchida R, Nakata K, Kawano F, Yonetani Y, Ogasawara I, Nakai N, Mae T, Matsuo T, Tachibana Y, Yokoi H, Yoshikawa H. Vibration acceleration promotes bone formation in rodent models. PLoS One 2017; 12:e0172614. [PMID: 28264058 PMCID: PMC5338772 DOI: 10.1371/journal.pone.0172614] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 02/06/2017] [Indexed: 11/30/2022] Open
Abstract
All living tissues and cells on Earth are subject to gravitational acceleration, but no reports have verified whether acceleration mode influences bone formation and healing. Therefore, this study was to compare the effects of two acceleration modes, vibration and constant (centrifugal) accelerations, on bone formation and healing in the trunk using BMP 2-induced ectopic bone formation (EBF) mouse model and a rib fracture healing (RFH) rat model. Additionally, we tried to verify the difference in mechanism of effect on bone formation by accelerations between these two models. Three groups (low- and high-magnitude vibration and control-VA groups) were evaluated in the vibration acceleration study, and two groups (centrifuge acceleration and control-CA groups) were used in the constant acceleration study. In each model, the intervention was applied for ten minutes per day from three days after surgery for eleven days (EBF model) or nine days (RFH model). All animals were sacrificed the day after the intervention ended. In the EBF model, ectopic bone was evaluated by macroscopic and histological observations, wet weight, radiography and microfocus computed tomography (micro-CT). In the RFH model, whole fracture-repaired ribs were excised with removal of soft tissue, and evaluated radiologically and histologically. Ectopic bones in the low-magnitude group (EBF model) had significantly greater wet weight and were significantly larger (macroscopically and radiographically) than those in the other two groups, whereas the size and wet weight of ectopic bones in the centrifuge acceleration group showed no significant difference compared those in control-CA group. All ectopic bones showed calcified trabeculae and maturated bone marrow. Micro-CT showed that bone volume (BV) in the low-magnitude group of EBF model was significantly higher than those in the other two groups (3.1±1.2mm3 v.s. 1.8±1.2mm3 in high-magnitude group and 1.3±0.9mm3 in control-VA group), but BV in the centrifuge acceleration group had no significant difference compared those in control-CA group. Union rate and BV in the low-magnitude group of RFH model were also significantly higher than those in the other groups (Union rate: 60% v.s. 0% in the high-magnitude group and 10% in the control-VA group, BV: 0.69±0.30mm3 v.s. 0.15±0.09mm3 in high-magnitude group and 0.22±0.17mm3 in control-VA group). BV/TV in the low-magnitude group of RFH model was significantly higher than that in control-VA group (59.4±14.9% v.s. 35.8±13.5%). On the other hand, radiographic union rate (10% in centrifuge acceleration group v.s. 20% in control-CA group) and micro-CT parameters in RFH model were not significantly different between two groups in the constant acceleration studies. Radiographic images of non-union rib fractures showed cartilage at the fracture site and poor new bone formation, whereas union samples showed only new bone. In conclusion, low-magnitude vibration acceleration promoted bone formation at the trunk in both BMP-induced ectopic bone formation and rib fracture healing models. However, the micro-CT parameters were not similar between two models, which suggested that there might be difference in the mechanism of effect by vibration between two models.
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Affiliation(s)
- Ryohei Uchida
- Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Sports Medicine, Seifu Hospital, Osaka, Japan.,Department of Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Ken Nakata
- Department of Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fuminori Kawano
- Department of Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasukazu Yonetani
- Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Issei Ogasawara
- Department of Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Naoya Nakai
- Department of Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tatsuo Mae
- Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tomohiko Matsuo
- Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuta Tachibana
- Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroyuki Yokoi
- Department of Medicine for Sports and Performing Arts, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hideki Yoshikawa
- Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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Cipollari S, Yokoi H, Ohki T, Kichikawa K, Nakamura M, Komori K, Nanto S, O'Leary E, Lotters A, Snyder S, Dake M. Effectiveness of the Zilver PTX drug-eluting stent for femoropopliteal peripheral arterial disease in patients with no tibial runoff vessels: 24-month results from the Zilver PTX Post-Market Study in Japan. J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Nakagawa T, Sakamoto T, Kodama S, Kobayashi M, Hanai N, Yokoi H, Suzuki M. Clinical and Pathological Outcomes of Multilayer Resection of Olfactory Neuroblastomas via Endoscopic Endonasal Approach. Skull Base Surg 2016. [DOI: 10.1055/s-0036-1579973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yokoi H, Tsutsumi S, Kohno N. Schwannoma of the nasal septum presenting as a multicentric neuronal tumour. B-ENT 2015; 11:141-145. [PMID: 26563015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
PROBLEM Schwannomas (neurilemmomas) are benign primary tumours that arise from Schwann cells. Schwannomas arising from the nasal septum are exceptionally rare. Here, we report a unique case of schwannoma of the nasal septum presenting as a multicentric neuronal tumour. RESULTS A 40-year old male sustained intermittent left tinnitus. Magnetic resonance imaging revealed masses near the nasal septum and upper cervical cord in addition to a tumour in the left cerebellopontine (CP) angle. The tumour in the nasal septum was completely resected by endoscopic endonasal surgery and diagnosed as a typical schwannoma. The CP angle tumour was treated with stereotactic radiosurgery, while the asymptomatic cord lesion showed no significant growth and remains under observation. CONCLUSION Endoscopic endonasal surgery is useful for the resection of schwannomas of the nasal septum. Schwannomas of the nasal septum may present as multiple neuronal tumours.
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Suzuki S, Yokoi H, Kozaki M, Kanzaki Y, Shiomi D, Sato K, Takui T, Okada K. Synthesis and Properties of a Bis[(nitronyl nitroxide)-2-ide radical anion]-Palladium Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402564] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yanagisawa T, Fukuma R, Hirata M, Matsushita K, Kishima H, Saitoh Y, Kato R, Seki T, Sugata H, Yokoi H, Kamitani Y, Yoshimine Y. O21: Neuroprosthetic arm using MEG signals of paralyzed patients. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50127-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hanatani T, Sai K, Tohkin M, Segawa K, Antoku Y, Nakashima N, Yokoi H, Ohe K, Kimura M, Hori K, Kawakami J, Saito Y. Evaluation of two Japanese regulatory actions using medical information databases: a ‘Dear Doctor’ letter to restrict oseltamivir use in teenagers, and label change caution against co-administration of omeprazole with clopidogrel. J Clin Pharm Ther 2014; 39:361-7. [DOI: 10.1111/jcpt.12153] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 02/20/2014] [Indexed: 12/22/2022]
Affiliation(s)
- T. Hanatani
- Division of Medicinal Safety Science; National Institute of Health Sciences; Tokyo Japan
- Department of Regulatory Science; Graduate School of Pharmaceutical Sciences; Nagoya City University; Aichi Japan
| | - K. Sai
- Division of Medicinal Safety Science; National Institute of Health Sciences; Tokyo Japan
| | - M. Tohkin
- Department of Regulatory Science; Graduate School of Pharmaceutical Sciences; Nagoya City University; Aichi Japan
| | - K. Segawa
- Division of Medicinal Safety Science; National Institute of Health Sciences; Tokyo Japan
| | - Y. Antoku
- Medical Information Center; Kyushu University Hospital; Fukuoka Japan
| | - N. Nakashima
- Medical Information Center; Kyushu University Hospital; Fukuoka Japan
| | - H. Yokoi
- Department of Medical Informatics; Kagawa University Hospital; Kagawa Japan
| | - K. Ohe
- Department of Medical Informatics and Economics; Division of Social Medicine; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
| | - M. Kimura
- Department of Medical Informatics; Hamamatsu University School of Medicine; Shizuoka Japan
| | - K. Hori
- Department of Hospital Pharmacy; Hamamatsu University School of Medicine; Shizuoka Japan
| | - J. Kawakami
- Department of Hospital Pharmacy; Hamamatsu University School of Medicine; Shizuoka Japan
| | - Y. Saito
- Division of Medicinal Safety Science; National Institute of Health Sciences; Tokyo Japan
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Domei T, Amemiya K, Enomoto S, Ichihashi K, Yokoi H, Iwabuchi M, Nobuyoshi M. Eicosapentaenoic acid reduced the progression of the coronary atherosclerosis in the patients with optimal LDL cholesterol lowering therapy. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p689] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kamioka N, Soga Y, Aihara H, Kobayashi Y, Ichihashi K, Hiramori S, Murata N, Tomoi Y, Yokoi H. Long-term follow-up after endovascular treatment in patients with femoropopliteal TASC II class A and B lesion. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Amemiya K, Domei T, Yokoi H, Iwabuchi M. Impact of bifurcation angle on mace after cross over single drug-eluting stent strategy in unprotected left main bifurcation lesion: 3-dimensional quantitative coronary angiographic analysis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Shimotakahara J, Yamaji K, Iwabuchi M, Yokoi H, Nobuyoshi M. Long-term outcomes in patients with early, late and very late stent thrombosis after bare metal stenting. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p4897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kamioka N, Soga Y, Aihara H, Yokoi H, Iwabuchi M, Nobuyoshi M. Impact of stent placement compared with balloon angioplasty in small vessel of femoropopliteal disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kozuma K, Otsuka M, Ikari Y, Uehara Y, Yokoi H, Sano K, Tanabe K, Kimura K, Yamane M, Ishiwata S. Clinical and angiographic outcomes of paclitaxel-eluting stent implantation in patients on maintenance hemodialysis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Domei T, Amemiya K, Ito T, Kuramitsu S, Yokoi H, Iwabuchi M, Nobuyoshi M. Insights into longitudinal stent elongation phenomenon after high pressure additional post stent dilatation from bench testing. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Amemiya K, Yokoi H, Iwabuchi M, Nobuyoshi M. Effect of aggressive lipid-lowering therapy with rosuvastatin on reduction of coronary plaque in Japanese patients: APOLLO study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yokoi H, Kanetoh Y. Visualization Analysis of Asymmetric Fountain Flow Phenomenon in Injection Molding of Filler-reinforced Resins by Rotary Runner Exchange System. INT POLYM PROC 2013. [DOI: 10.3139/217.1875] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
In this study, we attempted to visualize the flow patterns inside molded samples of glass-fibers or talc reinforced GPPS and PP especially in the vicinity of the flow front, using a rotary runner exchange system which instantaneously switches melt flowing into the cavity. From the visualization results, an extremely characteristic flow behavior was seen at the flow front area for resins with fillers which was not observed for those without fillers. Especially in the case of resins with 40 wt.% talc or 30 wt.% GF, a-symmetric zigzag fountain flows were generated alternately upward and downward along the cavity width direction. Moreover along the outer layer of the flow front, one observed a large amount of residual resin remaining for a long time during the cavity filling process, in the case of 40 wt.% GF, primarily due to the increase of viscosity which restricts the occurrence of diverging flow. Based on the above visualization results, we proposed a generic model of zigzag fountain flow; an a-symmetric upward flow in a certain area starts preventing the fountain flow in the upper side of the adjacent area, causing the diverging center to sink. This phenomenon subsequently causes an a-symmetric flow in the opposite direction in the next adjacent area, which continuously propagates along the cavity width direction.
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Affiliation(s)
- H. Yokoi
- Center for Collaborative Research, The University of Tokyo, Tokyo, Japan
| | - Y. Kanetoh
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
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Abstract
Abstract
In this study, cross-sectional analyses were performed on microcellular injection-molded high-impact polystyrene products. The results confirm that the following five types of layers were formed: Skin layers I (the silver streak layer) and II (a nonfoamed layer), Core layers I (cell diameter, d > 150 μm), II (d < 50 μm), and III (d > 100 μm). As the maximum in-mold pressure (Pmax) was increased from 5 to 30 MPa, the thickness of Skin layer II remained nearly constant. However, the foam types in the core layers changed from I and II to II and III or III only, resulting in an increase in cell diameter and a decrease in cell density. The process of cellular structure formation was observed using a glass-inserted mold, which revealed that this process consists of a flow (with a burst of cells at the melt front and the subsequent flow of the melt containing the cells), an end of the filling (involving elastic compression or the dissolution and disappearance of cells formed in the flow stage), and a cooling (new cell generation and growth and cooling solidification). Based on these cross-sectional observations, in concert with melt-pressure measurements and visualizations, we developed a model describing the formation process of Skin layer II and the core layers including a new concept that considers the melt pressure inside the cavity. The following layers are incorporated into the model: Skin layer II: A nonfoamed layer is formed in the area of the melt front where gases diffuse out from within the melt during the filling stage, and this nonfoamed layer moves to from melt front to the surface of the product due to fountain flow. Core layers I and II: A multilayer is formed containing a distribution of cells preserved from the flow stage due to the low compression forces, Core layer III: cells are dissolved in the melt due to strong compression forces at the end of the filling stage and then reform and grow in the cooling stage.
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Affiliation(s)
- T. Yamada
- Saitama Industrial Technology Center, Saitama, Japan
| | - Y. Murata
- Nippon Institute of Technology, Saitama, Japan
| | - H. Yokoi
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
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