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(Nakamura) Inaba A, Ishida Y, Toba Y. Lower extremity peripheral nerve block for total knee arthroplasty in a patient with chronic inflammatory demyelinating polyneuropathy: A case report. Medicine (Baltimore) 2024; 103:e37601. [PMID: 38552098 PMCID: PMC10977536 DOI: 10.1097/md.0000000000037601] [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: 12/03/2023] [Accepted: 02/23/2024] [Indexed: 04/02/2024] Open
Abstract
RATIONALE Chronic inflammatory demyelinating polyneuropathy (CIDP) is an autoimmune disorder that affects the peripheral nerves, leading to weakness and sensory symptoms. CIDP is a rare disease, and few studies have reported on anesthetic management in patients with this condition, especially the peripheral nerve block (PNB). Therefore, a safe and standardized anesthetic approach remains to be established. This case report aims to address this gap in evidence by documenting our experience with PNB in a patient with CIDP undergoing surgery. It contributes significantly to expanding the range of anesthetic options and enhancing perioperative outcomes for patients with CIDP. PATIENT CONCERNS A 58-year-old woman diagnosed with CIDP was scheduled to undergo left total knee arthroplasty due to osteonecrosis. We anticipated postoperative pain and aggravation of neurological symptoms. DIAGNOSIS CIDP. INTERVENTIONS To manage the postoperative pain, we planned a combination of general anesthesia (GA) and lower extremity PNBs, viz. the tibial and femoral nerve blocks, supplemented with intravenous patient-controlled analgesia. An initial dose of fentanyl 50 µg was administered as analgesia. The tibial and femoral nerves were identified using a peripheral nerve stimulator in conjunction with an ultrasonic echo device while the patient was conscious, to minimize the risk of nerve injury. The tibial and femoral nerve blocks were performed with 20 mL of ropivacaine (0.25%) and dexamethasone 2.2 mg, respectively. Subsequently, we administered fentanyl and ketamine and initiated continuous infusion of remifentanil. Thereafter, propofol 120 mg was administered intravenously over a span of 1 minute, followed by continuous infusion at 4 mg/kg/h. Upon confirming loss of consciousness, we induced GA using a supraglottic airway device without using muscle relaxants. For postoperative analgesia, we administered acetaminophen 1000 mg. OUTCOMES The patient experienced no pain immediately after surgery, and good analgesia was achieved subsequently without worsening of sensory symptoms during rehabilitation. LESSONS We achieved effective anesthetic management in a patient with CIDP by combining GA with nerve stimulation and ultrasound-guided PNB. It is crucial to devise a personalized anesthesia plan that focuses on the patients' safety and comfort while minimizing risk in patients with CIDP.
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Affiliation(s)
- Aka (Nakamura) Inaba
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
- Department of General Internal Medicine, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Yoshiaki Ishida
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
- Department of Critical Care Medicine, Tokyo Metropolitan Bokutoh Hospital, Sumida-ku, Tokyo, Japan
| | - Yoshie Toba
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
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Ishida Y, Murata T, Kakiuchi N, Ogawa S, Kabashima K. Emergence of multiple revertant keratinocyte clones in a patient with KID syndrome. J Eur Acad Dermatol Venereol 2024; 38:e285-e287. [PMID: 37907277 DOI: 10.1111/jdv.19595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 10/23/2023] [Indexed: 11/02/2023]
Affiliation(s)
- Y Ishida
- Department of Dermatology, Kyoto University, Kyoto, Japan
| | - T Murata
- Department of Dermatology, Hyogo Medical University, Hyogo, Japan
| | - N Kakiuchi
- The Hakubi Center for Advanced Research, Kyoto University, Kyoto, Japan
| | - S Ogawa
- Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, Japan
| | - K Kabashima
- Department of Dermatology, Kyoto University, Kyoto, Japan
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Ishida Y, Homma Y, Murakoshi T, Toba Y. Clinical experience of the use of fibrinogen concentrate for massive postpartum hemorrhage: a retrospective case series study. J Anesth 2023; 37:820-822. [PMID: 37620626 PMCID: PMC10543518 DOI: 10.1007/s00540-023-03247-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 08/15/2023] [Indexed: 08/26/2023]
Affiliation(s)
- Yoshiaki Ishida
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Naka Ku, 2-12-12 Sumiyoshi, Hamamatsu, Shizuoka, 430-8558, Japan.
- Department of Critical Care Medicine, Tokyo Metropolitan Bokutoh Hospital, Sumida-Ku, Tokyo, Japan.
| | - Yoichiro Homma
- Department of General Internal Medicine, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Takeshi Murakoshi
- Department of Obstetrics and Gynecology, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Yoshie Toba
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Naka Ku, 2-12-12 Sumiyoshi, Hamamatsu, Shizuoka, 430-8558, Japan
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4
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Noguchi S, Iwasaki H, Shiko Y, Kawasaki Y, Ishida Y, Shinomiya S, Ono Uokawa R, Mazda Y. Fetal outcomes with and without the use of sugammadex in pregnant patients undergoing non-obstetric surgery: a multicenter retrospective study. Int J Obstet Anesth 2023; 53:103620. [PMID: 36634449 DOI: 10.1016/j.ijoa.2022.103620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 12/10/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND The influence of sugammadex exposure during pregnancy on progesterone withdrawal and miscarriage is unknown. We aimed to compare the fetal outcomes in pregnant patients who had undergone non-obstetric surgery with and without sugammadex. METHODS We retrospectively reviewed the medical charts of pregnant women who underwent non-obstetric surgery at three tertiary perinatal care centers in Japan from January 2013 to December 2020. The women were divided into those who received general anesthesia with sugammadex (GA with SGX) and those who received general anesthesia without sugammadex (GA without SGX). We compared miscarriages and preterm births within four weeks after surgery. RESULTS Among the 124 women, 73 and 51 were included in the GA with SGX and GA without SGX groups, respectively. The two groups showed no differences in the rate of miscarriages or preterm births (3.0 % vs 4.3 %; odds ratio 1.42, 95 % confidence interval 0.19 to 10.47; P = 1.00). The SGX and no SGX groups were missing outcomes for 8.2 % and 7.8 % of cases, respectively. CONCLUSIONS Having GA with SGX or GA without SGX did not result in different rates of miscarriage or preterm birth within four weeks after the procedure. These findings do not exclude a potential association between sugammadex exposure during pregnancy and adverse pregnancy outcomes. Missing data may have obscured possible adverse outcomes from sugammadex exposure.
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Affiliation(s)
- S Noguchi
- Department of Obstetric Anesthesiology, Center for Maternal-Fetal and Neonatal Medicine, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - H Iwasaki
- Department of Anesthesiology, Nihon University School of Medicine, Tokyo, Japan
| | - Y Shiko
- Department of Anesthesiology, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan; Biostatistics Section, Clinical Research Center, Chiba University Hospital, Chiba, Japan
| | - Y Kawasaki
- Department of Anesthesiology, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan; Faculty of Nursing, Japanese Red Cross College of Nursing, Tokyo, Japan
| | - Y Ishida
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Shizuoka, Japan
| | - S Shinomiya
- Department of Anesthesiology, Chibune General Hospital, Osaka, Japan
| | - R Ono Uokawa
- Department of Anesthesiology, Chibune General Hospital, Osaka, Japan
| | - Y Mazda
- Department of Obstetric Anesthesiology, Center for Maternal-Fetal and Neonatal Medicine, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan.
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Irie H, Otsuka A, Ishida Y, Kawakami A, Kabashima K. 552 Identification of cutaneous Schwann cell subsets based on single cell gene expression analysis. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ishida Y, Habu M(I, Toba Y. Effective anesthetic management with remimazolam and ketamine without muscle relaxants for parotidectomy in a patient with myotonic dystrophy: A case report. Medicine (Baltimore) 2022; 101:e30415. [PMID: 36042643 PMCID: PMC9410637 DOI: 10.1097/md.0000000000030415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Patients with myotonic dystrophy (DM) are highly sensitive to anesthetics, muscle relaxants, and opioids, necessitating appropriate anesthetic management. Recently, remimazolam, an ultra-short-acting benzodiazepine, has been approved for use as a general anesthetic in Japan, and patients with DM have reportedly been treated with remimazolam. However, to the best of our knowledge, no study has reported on endotracheal intubation without the use of muscle relaxants under anesthetic management with remimazolam, nor on the combination of remimazolam and ketamine. PATIENT CONCERNS A 23-year-old man was referred to our hospital for right parotidectomy and diagnosed with DM just before surgery. At the surgeon's discretion, he was scheduled to undergo nerve monitoring to preserve the facial nerve. DIAGNOSIS Myotonic dystrophy. INTERVENTIONS We planned total intravenous anesthesia without muscle relaxants and selected remimazolam for anesthesia. Our aim was to prevent the intraoperative or postoperative complications associated with propofol and inhalational anesthetics. Additionally, we selected multimodal analgesia, including ketamine, to avoid opioid use. General anesthesia was induced with ketamine 30 mg, remifentanil 0.72 μg/kg/min, and remimazolam 12 + 6 mg. Endotracheal intubation was performed under videolaryngoscopy without the use of muscle relaxants. For postoperative analgesia, we administered additional doses of ketamine 20 mg and acetaminophen 1000 mg, and the surgeons infiltrated 8 mL of xylocaine 0.5% with epinephrine into the skin incision before starting the surgery. Intraoperative anesthesia was maintained with remimazolam 0.9 to 1.0 mg/kg/h and remifentanil 0.26 to 0.50 μg/kg/min. Flumazenil was administered for rapid awakening and safe extubation. All vitals, including the bispectral index, were stable during surgery. OUTCOMES The patient did not develop facial nerve paralysis, sore throat, or hoarseness, nor did he have any memory of the surgery. Good postoperative analgesia was achieved. LESSONS We achieved effective anesthetic management using remimazolam without muscle relaxants in a patient with DM. Furthermore, the combination of remimazolam and ketamine provided good sedation and postoperative analgesia.
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Affiliation(s)
- Yoshiaki Ishida
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
- *Correspondence: Yoshiaki Ishida, Department of Anesthesiology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Naka-ku, Hamamatsu-shi, Shizuoka 430-8558, Japan (e-mail: )
| | - Miki (Iwasaki) Habu
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Yoshie Toba
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
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Ishida Y, Homma Y, Kawamura T, Sagawa M, Toba Y. Accidental epidural catheter removal rates and strength required for disconnection: a retrospective cohort and laboratory study. BMC Anesthesiol 2022; 22:185. [PMID: 35710348 PMCID: PMC9200947 DOI: 10.1186/s12871-022-01728-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 06/10/2022] [Indexed: 11/21/2022] Open
Abstract
Background Epidural catheters are associated with certain risks such as accidental epidural catheter removal, including dislodgement and disconnection. Globally, neuraxial connector designs were revised in 2016 to provide new standardization aimed at decreasing the frequency of misconnections during the administration of medications. However, no studies have investigated accidental epidural catheter removal after the revised standardization. This study aimed to examine differences in dislodgement and disconnection rates associated with different catheter connector types, and to investigate the linear tensile strength required to induce disconnection. Methods This retrospective cohort study included adult patients who underwent elective surgery and received patient-controlled epidural analgesia. Patients were divided into groups according to the type of catheter connection used: old standard, new standard, and new standard with taping groups. Furthermore, we prepared 60 sets of epidural catheters and connectors comprising 20 sets for each of the old, new, and taping groups, and used a digital tension meter to measure the maximum tensile strength required to induce disconnection. Results This clinical study involved 360, 182, and 378 patients in the old, new, and taping groups, respectively. Dislodgement rates did not differ statistically among the three groups, while there was a significant difference in disconnection rates. Propensity score matching analysis for disconnection rates showed no difference between the old and new groups (2.8% vs. 4.5%, p = 0.574), while the new group had higher rates than the taping group (6.5% vs. 0%, p = 0.002). This laboratory study identified that a tensile strength of 12.41 N, 12.06 N, and 19.65 N was required for disconnection in the old, new, and taping groups, respectively, and revealed no significant difference between the new and old groups (p = 0.823), but indicated a significant difference between the new and taping groups (p < 0.001). Conclusions This clinical study suggested that dislodgement rates did not change among the three groups. Both clinical and laboratory studies revealed that disconnection rates did not change between the old and new connectors. Moreover, as a strategy to prevent accidents, taping the connecting points of the catheter connectors led to an increase in the tensile strength required for disconnection. Supplementary Information The online version contains supplementary material available at 10.1186/s12871-022-01728-z.
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Affiliation(s)
- Yoshiaki Ishida
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Naka-ku, Hamamatsu-shi, Shizuoka, 430-8558, Japan.
| | - Yoichiro Homma
- Department of General Internal Medicine, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Takashi Kawamura
- Department of Clinical Engineering, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Masatoshi Sagawa
- Department of Clinical Engineering, Seirei Hamamatsu General Hospital, Hamamatsu, Japan
| | - Yoshie Toba
- Department of Anesthesiology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Naka-ku, Hamamatsu-shi, Shizuoka, 430-8558, Japan
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8
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Ishida Y, Maeda K, Inoue T, Satake S, Mori N. Decreased Diversity of Gut Microbiota Is Associated with Decreased Muscle Mass and Function in Older Adults Residing in a Nursing Home. J Nutr Health Aging 2022; 26:537-538. [PMID: 35587768 DOI: 10.1007/s12603-022-1792-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Y Ishida
- Keisuke Maeda, MD, PhD, Department of Geriatric Medicine, Hospital, National Center for Geriatrics and Gerontology, 7-430 Morioka, Obu, Aichi, 474-8511, Japan, Phone: +81-562-46-2311; Fax: +81-562-44-8518, E-mail:
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9
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Bakker ME, Pluimakers VG, van Atteveld JE, Neggers SJCMM, van den Heuvel-Eibrink MM, Sato S, Yamashita K, Kiyotani C, Ishida Y, Maeda M. Perspectives on follow-up care and research for childhood cancer survivors: results from an international SIOP meet-the-expert questionnaire in Kyoto, 2018. Jpn J Clin Oncol 2021; 51:1554-1560. [PMID: 34409997 DOI: 10.1093/jjco/hyab126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 07/23/2021] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION Survival of childhood cancer has increased over the past decades. This has led to the development of strategies aiming to enhance follow-up care and research, for which priorities may vary globally. We explored perspectives of an international healthcare workers panel. METHODS Attendants of a meet-the-expert session on childhood cancer survivorship at the 2018 SIOP conference completed a survey about their view on important follow-up care and research aspects for survivors below and over 18 years. We analysed overarching categories and subtopics, and compared Asian versus European and North American healthcare workers. RESULTS A total of 58 participants from different medical specialties (67.2% paediatric oncologists) and continents (48.3% Asia, 39.7% Europe/North America) responded. Follow-up care priorities for survivors below and over 18 years included physical care (39.3% ≤18 years, 35.9% >18 years) and healthcare structure (29.4%, 26.0%). Physical care was also the most important research aspect for both age groups (52.5%, 50.7%). Psychological support was the most frequently reported subtopic. Asian clinicians (n = 22) primarily prioritized physical care aspects of follow-up care, whereas European/North American (n = 19) clinicians underscored the importance of healthcare structure. CONCLUSION Physical care is the most important aspect of survivorship care and research according to clinicians from several continents. Asian and European/North American respondents shared most priorities, however, healthcare structure was a more important category for European/North American clinicians. The most common subtopic was psychological support, underlining also the need to involve psychologists in follow-up.
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Affiliation(s)
- M E Bakker
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - V G Pluimakers
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - J E van Atteveld
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - S J C M M Neggers
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands.,Department of Medicine, section Endocrinology, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | | | - S Sato
- St. Luke's International University, Tokyo, Japan
| | - K Yamashita
- Children's Cancer Association of Tokyo, Japan
| | - C Kiyotani
- National Center for Child Health and Development, Tokyo, Japan
| | - Y Ishida
- Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - M Maeda
- Nippon Medical School, Tokyo, Japan
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10
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Murata T, Ishida Y, Mostafa A, Kabashima K. 197 Revertant mosaicism as a clue for the role of keratinocytes in innate immunity against Candidaspecies. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.202] [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: 10/20/2022]
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11
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Takata M, Komori T, Ishida Y, Fujimoto M, Ogawa S, Kabashima K. Basal cell carcinoma on the ventral site of the finger with an intronic deletion of SUFU gene. J Eur Acad Dermatol Venereol 2021; 36:e128-e130. [PMID: 34553799 DOI: 10.1111/jdv.17694] [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: 04/28/2021] [Accepted: 09/15/2021] [Indexed: 11/29/2022]
Affiliation(s)
- M Takata
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Komori
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Y Ishida
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - M Fujimoto
- Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - S Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Takamoto K, Komori T, Ishida Y, Kambe N, Kabashima K. Up-dosing of nivolumab may induce serious immune-related adverse events. J Eur Acad Dermatol Venereol 2021; 36:e141-e142. [PMID: 34551172 DOI: 10.1111/jdv.17701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/16/2021] [Indexed: 12/18/2022]
Affiliation(s)
- K Takamoto
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Komori
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Y Ishida
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - N Kambe
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - K Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Badertscher P, John L, Payne J, Bainey A, Ishida Y, Field M, Winterfield J, Gold MR. Impact of age on catheter ablation of premature ventricular contractions. Europace 2021. [DOI: 10.1093/europace/euab116.361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Introduction
Catheter ablation (CA) of frequent premature ventricular contractions (PVC) is increasingly performed in older patients as the population ages.
Purpose
The purpose of this study was to assess the impact of age on procedural characteristics, safety and efficacy on PVC ablations.
Methods
Consecutive patients with symptomatic PVCs undergoing CA between 2015 and 2020 were evaluated. Acute ablation success was defined as the elimination of PVCs at the end of the procedure. Sustained success was defined as an elimination of symptoms, and ≥80% reduction of PVC burden determined by Holter-ECG during long-term follow. Patients were sub-grouped based on age (< 65 years vs. ≥ 65 years).
Results
A total of 114 patients were enrolled (median age 64 years, 71% males) and followed up for a median duration of 228 days. Baseline and procedural data were similar in both age groups. A left-sided origin of PVCs was more frequently observed in the elderly patient group compared to younger patients (83% vs. 67%, p = 0.04, Figure 1). The median procedure time was significantly shorter in elderly patients (160 min vs. 193 min, p = 0.02). The rates of both acute (86% vs. 92%, p = 0.32) and sustained success (70% vs. 71%, p = 0.90) were similar between groups. Complications rates (3.7%) did not differ between the two groups.
Conclusion
In a large series of patients with a variety of underlying arrhythmia substrates, similar rates of acute procedural success, complications, and ventricular arrhythmia-free-survival were observed after CA of PVCs. Older age alone should not be a reason to withhold CA of PVCs. Abstract Figure 1
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Affiliation(s)
- P Badertscher
- University Hospital Basel, Cardiovascular Research Institute Basel (CRIB), Basel, Switzerland
| | - L John
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
| | - J Payne
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
| | - A Bainey
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
| | - Y Ishida
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
| | - M Field
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
| | - J Winterfield
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
| | - MR Gold
- Medical University of South Carolina, Department of Cardiology, Charleston, United States of America
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Ishida Y, Ogura F, Kondo S, Toba Y. Successful peripheral nerve block under dexmedetomidine sedation for femoral neck fracture fixation in a 97-year-old patient. BMJ Case Rep 2021; 14:e239468. [PMID: 33906885 PMCID: PMC8076929 DOI: 10.1136/bcr-2020-239468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2021] [Indexed: 11/16/2022] Open
Abstract
Hip fracture is a common injury in elderly patients. In Japan, the number of super-old patients-age >90 years-with hip fractures has increased drastically over time. Available strategies for anaesthetic management for hip fracture surgery include general anaesthesia, neuraxial anaesthesia and peripheral nerve block. However, general and neuraxial anaesthesia are often avoided for various reasons, particularly in elderly patients. In recent years, peripheral nerve block has proven effective in various surgical procedures. Additionally, dexmedetomidine exhibits neuroprotective effects and has been used safely in super-old patients. Herein, we demonstrate successful anaesthetic management with peripheral nerve block under dexmedetomidine sedation for open reduction and internal fixation of a femoral neck fracture in a 97-year-old patient.
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Affiliation(s)
- Yoshiaki Ishida
- Anesthesiology, Seirei Hamamatsu Hospital, Hamamatsu, Shizuoka, Japan
| | - Fumiko Ogura
- Anesthesiology, Seirei Hamamatsu Hospital, Hamamatsu, Shizuoka, Japan
| | - Satoko Kondo
- Anesthesiology, Seirei Hamamatsu Hospital, Hamamatsu, Shizuoka, Japan
| | - Yoshie Toba
- Anesthesiology, Seirei Hamamatsu Hospital, Hamamatsu, Shizuoka, Japan
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Kim SH, Jung S, Seok B, Kim YS, Park H, Otsu T, Kobayashi Y, Kim C, Ishida Y. A compact and stable incidence-plane-rotating second harmonics detector. Rev Sci Instrum 2021; 92:043905. [PMID: 34243408 DOI: 10.1063/5.0047337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 04/05/2021] [Indexed: 06/13/2023]
Abstract
We describe a compact and stable setup for detecting the optical second harmonics, in which the incident plane rotates with respect to the sample. The setup is composed of rotating Fresnel rhomb optics and a femtosecond ytterbium-doped fiber laser source operating at the repetition frequency of 10 MHz. The setup including the laser source occupies an area of 1 m2 and is stable so that the intensity fluctuation of the laser harmonics can be less than 0.2% for 4 h. We present the isotropic harmonic signal of a gold mirror of 0.5 pW and demonstrate the integrity and sensitivity of the setup. We also show the polarization-dependent six-fold pattern of the harmonics of a few-layer WSe2, from which we infer the degree of local-field effects. Finally, we describe the extensibility of the setup to investigate the samples in various conditions such as cryogenic, strained, ultrafast non-equilibrium, and high magnetic fields.
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Affiliation(s)
- S H Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
| | - S Jung
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
| | - B Seok
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
| | - Y S Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
| | - H Park
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - T Otsu
- ISSP, The University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - Y Kobayashi
- ISSP, The University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - C Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
| | - Y Ishida
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea
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Ishida Y, Maeda K, Ueshima J, Shimizu A, Nonogaki T, Kato R, Matsuyama R, Yamanaka Y, Mori N. The SARC-F Score on Admission Predicts Falls during Hospitalization in Older Adults. J Nutr Health Aging 2021; 25:399-404. [PMID: 33575734 DOI: 10.1007/s12603-021-1597-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVES Community-dwelling older adults with sarcopenia are likely to fall. However, few studies have investigated whether sarcopenia is associated with falls during hospitalization in older adults. The purpose of this study was to determine whether the SARC-F when used as a simple screening tool for sarcopenia at the time of admission, predicts in-hospital falls. DESIGN A retrospective, observational study. SETTING A 900-bed university hospital. PARTICIPANTS A total of 9,927 patients aged 65 years and older were hospitalized at the hospital between April 2019 and March 2020. MEASUREMENTS The SARC-F contains five items: strength, assistance in walking, rise from a chair, climb stairs, and falls were evaluated at hospital admission. To investigate the relationship between the SARC-F score and falls, a ROC curve analysis was performed. Multivariate analysis adjusted for fall-related confounding factors such as age, gender, ADL, and disease were performed. RESULTS Mean age: 75.9±6.7 years; male: 56.2% were analyzed, and 159 patients (1.6%) fell during hospitalization. SARC-F scores at admission were significantly higher in the fall group than in the control group (3 [1-6] points vs. 0 [¬0-2] point, p<0.001). Statistical association was observed between the SARC-F and in-hospital fall (area under the curve = 0.721 [0.678-0.764], p < 0.001). The cut-off value for the highest sensitivity and specificity of the SARC-F score for in-hospital falls was two (sensitivity = 0.679, specificity = 0.715). Among the subitem of the SARC-F, the hazard ratios for climbing stairs were significantly higher (HR = 1.52 [1.10-2.09], p = 0.011) and for a history of fall was significantly higher (HR = 1.41 [1.02-1.95], p = 0.036). A SARC-F score ≥ 2 had a significantly higher incidence of in-hospital falls compared to a SARC-F score <2 (3.7% vs. 0.7%, p < 0.001). Also, a SARC-F score ≥ 2 had a significantly higher hazard ratio for falls (2.11 [1.37-3.26], p < 0.001). CONCLUSION SARC-F can help predict falls among hospitalized older adults.
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Affiliation(s)
- Y Ishida
- Keisuke Maeda, M.D., Ph.D., Department of Geriatric Medicine, National Center for Geriatrics and Gerontology, 7-430 Morioka, Obu, Aichi, 474-8511, Japan, Phone: +81-562-46-2311; FAX: +81-562-44-8518, E-mail:
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17
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Ueshima J, Maeda K, Ishida Y, Shimizu A, Inoue T, Nonogaki T, Matsuyama R, Yamanaka Y, Mori N. SARC-F Predicts Mortality Risk of Older Adults during Hospitalization. J Nutr Health Aging 2021; 25:914-920. [PMID: 34409971 DOI: 10.1007/s12603-021-1647-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVES To determine the association between SARC-F scores and the in-hospital mortality risk among older patients admitted to acute care hospitals. DESIGN Single-center retrospective study. SETTING A university hospital. PARTICIPANTS All consecutive patients aged older than 65 were admitted and discharged from the study hospital between July 2019 and September 2019. MEASUREMENTS Relevant patient data included age, sex, body mass index, nutritional status, fat-free mass, disease, activities of daily living (ADL), duration of hospital stay, SARC-F, and occurrence of death within 30 days of hospitalization. The diseases that caused hospitalization and comorbidities (Charlson Comorbidity Index; CCI) were obtained from medical records. The Eastern Cooperative Oncology Group-performance status (PS) was used to determine ADL, and the in-hospital mortality rate within 30 days of hospitalization as the outcome. RESULTS We analyzed 2,424 patients. The mean age was 75.9±6.9 and 55.5% were male. Fifty-three in-hospital mortalities occurred among the participants within the first 30 days of hospitalization. Patients who died in-hospital were older, had poorer nutritional status and severer PS scores, and more comorbidities than those who did not. A SARC-F score of ≥4 predicted a higher mortality risk within those 30 days with the following precision: sensitivity 0.792 and specificity 0.805. There were significantly more deaths in Kaplan-Meier curves regarding a score of SARC-F≥4 than a score of SARC-F<4 (p<0.001). Cox proportional hazard analysis was used to identify the clinical indicators most associated with in-hospital mortality. SARC-F≥4 (Hazard Ratio: HR 5.65, p<0.001), CCI scores (HR1.11, p=0.004), and infectious and parasitic diseases (HR3.13, p=0.031) were associated with in-hospital mortality. The SARC-F items with significant in-hospital mortality effects were assistance with walking (HR 2.55, p<0.001) and climbing stairs (HR 2.46, p=0.002). CONCLUSION The SARC-F questionnaire is a useful prognostic indicator for older adults because a SARC-F ≥4 score during admission to an acute care hospital predicts in-hospital mortality within 30 days of hospitalization.
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Affiliation(s)
- J Ueshima
- Keisuke Maeda, M.D., Ph.D. Department of Geriatric Medicine, National Center for Geriatrics and Gerontology, 7-430 Morioka, Obu, Aichi, 474-8511, Japan, Phone: +81-562-46-2311; FAX: +81-562-44-8518, E-mail:
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18
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Ishida Y, Morita M, Sasaki T, Taniguchi A. Spinal anesthesia for muscle biopsy in an infant with a suspected neuromuscular disorder: a case report. JA Clin Rep 2020; 6:84. [PMID: 33078243 PMCID: PMC7572997 DOI: 10.1186/s40981-020-00392-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 11/30/2022] Open
Abstract
Background Neuromuscular disorders (NMDs) occur in different forms and are generally diagnosed using muscle biopsy. Among the available anesthetic management options for infants with a suspected NMD are general anesthesia (GA) and regional anesthesia (RA), including spinal anesthesia (SA). Anesthesia selection is often challenging from the point of potential airway risks and anesthetic drug-related complications. Case presentation A 6-month-old male infant repeatedly underwent endotracheal intubation and extubation after birth because of respiratory muscle weakness and copious secretions. He was suspected of having NMD and was scheduled for muscle biopsy. His generalized hypotonia and decreased respiratory function presented a potentially difficult airway and complicated the selection of an appropriate anesthetic method. We selected SA and dexmedetomidine, which are safe for infants. Conclusion We report the successful and effective anesthetic management of SA and dexmedetomidine in an infant with a suspected NMD.
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Wupper S, Fischer A, Luersen K, Ipharraguerre IR, Chikamoto K, Furune T, Ishida Y, Terao K, Rimbach G. Effects of dietary gamma-cyclodextrin on voluntary activity and muscle strength in mice. J Physiol Pharmacol 2020; 71. [PMID: 32991317 DOI: 10.26402/jpp.2020.3.08] [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] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 06/30/2020] [Indexed: 11/03/2022]
Abstract
Gamma-cyclodextrin (γCD) is a cyclic oligosaccharide consisting of eight α-(1,4)-linked glucopyranose subunits, which is often used in the food and pharmaceutical industries. However, little is known regarding the metabolic activity of "empty" γCD per se. Therefore, in the present study young C57BL/6 male mice received a control diet (CON) or an experimental diet that was supplemented with 12.88% γCD exchanged against corn starch. After 6 weeks of treatment, the voluntary wheel running activity was monitored and the muscle strength of mice was measured by employing Kondziela's inverted screen test and forelimb grip strength assay. The γCD-treated mice covered a significantly larger distance per night (CON 8.6 km, γCD 12.4 km) and were significantly longer active (CON 340 min, γCD 437 min). Moreover, γCD-treated mice significantly performed better at the inverted screen test indicated by an enhanced Kondziela score (CON 3.10, γCD 4.63). These data suggest that dietary γCD leads to an increased endurance. We also found a slightly anti-glycemic effect of γCD during oral glucose tolerance test. However, our mice from the γCD group exhibited no difference in terms of GLUT2 protein level in ileum tissue nor increased muscle glycogen storage. Furthermore, γCD exhibited no DPP-4 inhibitory activity in vitro. By analysing candidate muscle genes and proteins related to endurance and muscle performance we did not observe any differences in terms of Sirt1, Pgc1α, Cpt1b, Mef2c, Myh1 and Myh2 gene expression levels as well as total oxidative phosphorylation (OXPHOS), mtTFA and GLUT4 protein expression levels in skeletal muscle in response to γCD. We could not fully establish the exact underlying molecular mechanisms of the fitness improvement by dietary γCD which warrants further investigations.
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Affiliation(s)
- S Wupper
- Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany.
| | - A Fischer
- Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany
| | - K Luersen
- Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany
| | - I R Ipharraguerre
- Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany
| | - K Chikamoto
- CycloChem Bio Co., Ltd., 7-4-5 Minatojima-minamimachi, Chuo-ku, Kobe, Japan
| | - T Furune
- CycloChem Bio Co., Ltd., 7-4-5 Minatojima-minamimachi, Chuo-ku, Kobe, Japan
| | - Y Ishida
- CycloChem Bio Co., Ltd., 7-4-5 Minatojima-minamimachi, Chuo-ku, Kobe, Japan
| | - K Terao
- CycloChem Bio Co., Ltd., 7-4-5 Minatojima-minamimachi, Chuo-ku, Kobe, Japan
| | - G Rimbach
- Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany
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20
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Ghazawi FM, Iga N, Tanaka R, Fujisawa Y, Yoshino K, Yamashita C, Yamamoto Y, Fujimura T, Yanagi T, Hata H, Matsushita S, Le M, Roy SF, Lagacé F, Ishida Y, Kabashima K, Otsuka A. Demographic and clinical characteristics of extramammary Paget's disease patients in Japan from 2000 to 2019. J Eur Acad Dermatol Venereol 2020; 35:e133-e135. [PMID: 32780877 DOI: 10.1111/jdv.16868] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F M Ghazawi
- Division of Dermatology, University of Ottawa, Ottawa, ON, Canada
| | - N Iga
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - R Tanaka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Y Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - K Yoshino
- Department of Dermatologic Oncology, Tokyo Metropolitan Cancer and Infectious Disease Center, Komagome Hospital, Tokyo, Japan
| | - C Yamashita
- Department of Dermatologic Oncology, Tokyo Metropolitan Cancer and Infectious Disease Center, Komagome Hospital, Tokyo, Japan
| | - Y Yamamoto
- Department of Dermatology, Wakayama Medical University Graduate School of Medicine, Wakayama, Japan
| | - T Fujimura
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - T Yanagi
- Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - H Hata
- Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - S Matsushita
- Department of Dermato-Oncology/Dermatology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - M Le
- Division of Dermatology, McGill University, Montreal, QC, Canada
| | - S F Roy
- Department of Pathology and Cell Biology, University of Montreal, Montreal, QC, Canada
| | - F Lagacé
- Division of Dermatology, McGill University, Montreal, QC, Canada
| | - Y Ishida
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - K Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - A Otsuka
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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21
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Sakanaka K, Ishida Y, Fujii K, Ishihara Y, Nakamura M, Hiraoka M, Mizowaki T. Radiation Dose-escalated Chemoradiotherapy Using Simultaneous Integrated Boost Intensity-Modulated Radiotherapy for Locally Advanced Unresectable Thoracic Oesophageal Squamous Cell Carcinoma: A Single-institution Phase I Study. Clin Oncol (R Coll Radiol) 2020; 33:191-201. [PMID: 32768158 DOI: 10.1016/j.clon.2020.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/22/2020] [Accepted: 07/15/2020] [Indexed: 12/25/2022]
Abstract
AIMS About 80% of cases of locally advanced unresectable thoracic oesophageal squamous cell carcinoma recur within the irradiation fields after chemoradiotherapy. Radiation dose escalation using advanced radiotherapy techniques is expected to improve clinical outcomes by reducing local and regional recurrence. The current study aimed to determine the recommended escalated radiation dose for these patients. MATERIALS AND METHODS Patients with locally advanced unresectable thoracic oesophageal squamous cell carcinoma with good performance status underwent chemoradiotherapy using simultaneous integrated boost intensity-modulated radiotherapy (SIB-IMRT) with elective nodal irradiation. SIB-IMRT was delivered in five fractions per week. The radiation dose to the unresectable gross tumour was escalated from 66 Gy to a planned maximum dose of 72 Gy in 3 Gy increments in a standard 3 + 3 design. The doses to the resectable component, superficial tumours and elective nodal regions were fixed as 60, 51 and 48 Gy, respectively. Cisplatin and 5-fluorouracil were concurrently administered. Dose-limiting toxicity (DLT) was defined as acute grade 3 oesophagitis, grade 2 pneumonitis, grade 2 cardiac toxicity and a failure to complete planned radiotherapy within 60 days. Locoregional control and overall survival were estimated using the Kaplan-Meier method. Nine patients were enrolled. RESULTS DLTs occurred in one of six and two of three patients at doses of 66 and 69 Gy, respectively. All DLTs were grade 3 oesophagitis. The recommended dose was determined as 66 Gy delivered in 30 fractions based on the predefined criteria. With a median follow-up period of 23 months, the 1-year locoregional control and overall survival rates were 67 (95% confidence interval = 19-90) and 78% (95% confidence interval = 36-94), respectively. CONCLUSION The recommended radiation dose in chemoradiotherapy using SIB-IMRT with elective nodal irradiation was 66 Gy delivered in 30 fractions.
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Affiliation(s)
- K Sakanaka
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Y Ishida
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K Fujii
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Y Ishihara
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Japanese Red Cross Wakayama Medical Center, Wakayama, Japan
| | - M Nakamura
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Division of Medical Physics, Department of Information Technology and Medical Engineering, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - M Hiraoka
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Japanese Red Cross Wakayama Medical Center, Wakayama, Japan
| | - T Mizowaki
- Department of Radiation Oncology and Image-applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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22
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Katsuo K, Kaku Y, Yamamura K, Ishida Y, Endo Y, Egawa G, Otsuka A, Kabashima K. Atypical blue naevus of the labium minus confirmed by whole-exome sequencing. J Eur Acad Dermatol Venereol 2020; 35:e59-e61. [PMID: 32648949 DOI: 10.1111/jdv.16805] [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: 11/29/2022]
Affiliation(s)
- K Katsuo
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Y Kaku
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Dermatology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - K Yamamura
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Y Ishida
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Y Endo
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - G Egawa
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - A Otsuka
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K Kabashima
- Department of Dermatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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23
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Ishida Y, Maeda K, Nonogaki T, Shimizu A, Yamanaka Y, Matsuyama R, Kato R, Ueshima J, Murotani K, Mori N. SARC-F as a Screening Tool for Sarcopenia and Possible Sarcopenia Proposed by AWGS 2019 in Hospitalized Older Adults. J Nutr Health Aging 2020; 24:1053-1060. [PMID: 33244560 DOI: 10.1007/s12603-020-1462-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECT The SARC-F questionnaire is a sarcopenia screening tool. However, the validity of the SARC-F score ≥4 (SARC-F≥4) for the evaluation of sarcopenia in the hospital setting has not been investigated. This study investigated the validity of SARC-F≥4 as a screening tool for sarcopenia among hospitalized older adults. DESIGN Cross-sectional retrospective study. SETTING A university hospital. PARTICIPANTS This study included older adult patients (age ≥65 years) who were hospitalized at, and subsequently discharged from, the hospital between April and September 2019 and underwent a nutritional assessment by the nutrition support team during their hospitalization. MEASUREMENTS SARC-F was recorded at the time of admission, and the criteria specified by the Asia Working Group for Sarcopenia in 2019 (AWGS 2019) were applied to diagnose sarcopenia and possible sarcopenia. Appendicular muscle mass was estimated through validated equations, and three different models were developed for sarcopenia diagnosis. The sensitivity, specificity, and positive/negative likelihood ratios were calculated to analyze the accuracy of the SARC-F≥4 for sarcopenia and possible sarcopenia. Receiver-operating characteristic analyses were conducted to calculate the area under the curve (AUC). RESULTS In total, 1,689 patients (mean age: 77.2±7.3 years; male: 54.4%) were analyzed, and 636 patients (37.7%) had SARC-F≥4. Patients with SARC-F≥4 had a statistically significant higher prevalence of AWGS 2019-defined sarcopenia than patients with SARC-F <4 in the models (65.4-78.9% vs 40.9-45.2%, p<0.001). The sensitivity, specificity, and positive/negative likelihood ratios of SARC-F≥4 for sarcopenia and possible sarcopenia were 49.1-51.3%, 73.9-81.2%, and 1.88-2.72/0.60-0.69 and 48.0%, 84.5%, and 3.11/0.62, respectively. The AUC for sarcopenia and possible sarcopenia were 0.644-0.695 and 0.708, respectively. The AUC of SARC-F for possible sarcopenia was equivalent to or larger than that for sarcopenia (DeLong test p=0.438, 0.088, and <0.001 vs the three models). CONCLUSIONS SARC-F≥4 is suitable as a screening tool for sarcopenia in hospitalized older adults. SARC-F assessment could facilitate the detection and exclusion of sarcopenia at hospitalization and may lead to early adoption of a therapeutic and preventive approach.
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Affiliation(s)
- Y Ishida
- Keisuke Maeda, Department of Geriatric Medicine, National Center for Geriatrics and Gerontology, 7-430 Morioka, Obu, Aichi, 474-8511, Japan, Phone: +81-562-46-2311; FAX: +81-562-44-8518, E-mail:
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24
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Nakashima C, Ishida Y, Nakagawa K, Irie H, Hirata M, Kataoka T, Otsuka A, Kabashima K. Identification of CD49a+ CD8+ resident memory T cells in vitiligo-like lesions associated with nivolumab treatment for melanoma. J Eur Acad Dermatol Venereol 2019; 34:e79-e82. [PMID: 31571305 DOI: 10.1111/jdv.15970] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C Nakashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Y Ishida
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - K Nakagawa
- Department of Dermatology, Saiseikai Tondabayashi Hospital, Osaka, Japan
| | - H Irie
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - M Hirata
- Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Kataoka
- Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - A Otsuka
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Translational Research Department for Skin and Brain Diseases, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - K Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Singapore Immunology Network (SIgN) and Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
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25
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Nakashima C, Ishida Y, Kaku Y, Epstein E, Otsuka A, Kabashima K. Dupilumab improved atypical fibrotic skin plaques in atopic dermatitis. Br J Dermatol 2019; 182:487-488. [DOI: 10.1111/bjd.18359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- C. Nakashima
- Department of Dermatology Kyoto University Graduate School of Medicine 54 Kawahara‐cho, Shogoin, Sakyo‐ku Kyoto 606‐8507 Japan
| | - Y. Ishida
- Department of Dermatology Kyoto University Graduate School of Medicine 54 Kawahara‐cho, Shogoin, Sakyo‐ku Kyoto 606‐8507 Japan
| | - Y. Kaku
- Department of Dermatology Kyoto University Graduate School of Medicine 54 Kawahara‐cho, Shogoin, Sakyo‐ku Kyoto 606‐8507 Japan
| | | | - A. Otsuka
- Department of Dermatology Kyoto University Graduate School of Medicine 54 Kawahara‐cho, Shogoin, Sakyo‐ku Kyoto 606‐8507 Japan
| | - K. Kabashima
- Department of Dermatology Kyoto University Graduate School of Medicine 54 Kawahara‐cho, Shogoin, Sakyo‐ku Kyoto 606‐8507 Japan
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Kono S, Kumamoto T, Kurahashi Y, Niwa H, Ishida Y, Shinohara H. A novel surgical strategy for the resection of duodenal gastrointestinal stromal tumours located close to the duodenal ampulla: a case report. Ann R Coll Surg Engl 2019; 102:e29-e32. [PMID: 31508985 DOI: 10.1308/rcsann.2019.0112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Although the optimal surgical procedure for the resection of duodenal gastrointestinal stromal tumours has not yet been characterised due to the low prevalence of these tumours and the anatomical complexity of the duodenopancreatic region, difficult surgical procedures such as pancreaticoduodenectomy are often proposed for stromal tumours located in the second portion of the duodenum. Our case report highlights a novel surgical strategy that can be implemented as an alternative to pancreaticoduodenectomy for such tumours close to the duodenal ampulla. A 70-year-old man incidentally diagnosed with a stromal tumour close to the duodenal ampulla in the second portion of the duodenum underwent local resection guided by an endoscopic nasobiliary drainage tube with primary closure. This tube was converted to a percutaneous trans-small intestinal biliary drainage tube during the procedure to prevent biliary leakage biliary stasis due to swelling of the duodenal ampulla. He also underwent a simple distal gastrectomy with Roux-en-Y reconstruction. This resulted in successful R0 resection. There were no procedure-related complications or post-surgery weight changes. Our simple novel surgical strategy may therefore be useful for avoiding pancreaticoduodenectomy and maintaining quality of life in patients with stromal tumours close to the duodenal ampulla.
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Affiliation(s)
- S Kono
- Department of Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - T Kumamoto
- Department of Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Y Kurahashi
- Department of Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - H Niwa
- Department of Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Y Ishida
- Department of Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - H Shinohara
- Department of Surgery, Hyogo College of Medicine, Hyogo, Japan
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Sakanaka K, Ishida Y, Fujii K, Ishihara Y, Nakamura M, Hiraoka M, Mizowaki T. Radiation Dose Escalated Chemoradiotherapy Using Simultaneous Integrated Boost Intensity-Modulated Radiotherapy for Locally Advanced Unresectable Thoracic Esophageal Squamous Cell Carcinoma: A Single Institutional Phase I Study. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2018] [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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28
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Mori N, Maeda K, Nonogaki T, Ishida Y, Kimura T. PT04.3: Prognostic Significance of Muscle Depletion in End-Stage Cancer Patients. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32561-0] [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: 11/16/2022]
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29
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Shimojima T, Suzuki Y, Nakamura A, Mitsuishi N, Kasahara S, Shibauchi T, Matsuda Y, Ishida Y, Shin S, Ishizaka K. Ultrafast nematic-orbital excitation in FeSe. Nat Commun 2019; 10:1946. [PMID: 31036846 PMCID: PMC6488589 DOI: 10.1038/s41467-019-09869-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 03/30/2019] [Indexed: 11/24/2022] Open
Abstract
The electronic nematic phase is an unconventional state of matter that spontaneously breaks the rotational symmetry of electrons. In iron-pnictides/chalcogenides and cuprates, the nematic ordering and fluctuations have been suggested to have as-yet-unconfirmed roles in superconductivity. However, most studies have been conducted in thermal equilibrium, where the dynamical property and excitation can be masked by the coupling with the lattice. Here we use femtosecond optical pulse to perturb the electronic nematic order in FeSe. Through time-, energy-, momentum- and orbital-resolved photo-emission spectroscopy, we detect the ultrafast dynamics of electronic nematicity. In the strong-excitation regime, through the observation of Fermi surface anisotropy, we find a quick disappearance of the nematicity followed by a heavily-damped oscillation. This short-life nematicity oscillation is seemingly related to the imbalance of Fe 3dxz and dyz orbitals. These phenomena show critical behavior as a function of pump fluence. Our real-time observations reveal the nature of the electronic nematic excitation instantly decoupled from the underlying lattice. Several experiments have shown evidence for unusual nematic electronic behaviour in unconventional superconductors. Here the authors use pump-probe spectroscopy to observe out-of-equilibrium behaviour of coupled nematic-orbital excitations in iron selenide.
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Affiliation(s)
- T Shimojima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan. .,Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan.
| | - Y Suzuki
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - A Nakamura
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.,Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - N Mitsuishi
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - S Kasahara
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - T Shibauchi
- Department of Advanced Materials Science, The University of Tokyo, Kashiwa, 277-8561, Japan
| | - Y Matsuda
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - Y Ishida
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, 277-8581, Japan
| | - S Shin
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, 277-8581, Japan
| | - K Ishizaka
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.,Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
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30
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Maeda K, Ishida Y, Nonogaki T, Shimizu A, Yamanaka Y, Matsuyama R, Kato R, Mori N. Burden of Premorbid Consumption of Texture Modified Diets in Daily Life on Nutritional Status and Outcomes of Hospitalization. J Nutr Health Aging 2019; 23:973-978. [PMID: 31781727 DOI: 10.1007/s12603-019-1237-3] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVES Due to the water-rich cooking process required to soften texture modified diets (TMDs), TMDs may have poorer nutrition. The aim of this study was to investigate the associations between daily premorbid TMD consumption and nutritional status at the time of hospitalization, and its burden on hospitalization outcomes. DESIGN Retrospective observational study. SETTING An academic hospital. PARTICIPANTS The cohort comprised 3,594 older adult patients aged ≥65 years admitted to the hospital. MEASUREMENTS Patients were interviewed on admission using a premorbid daily consumption meal form to determine whether the patient ate a TMD. Nutritional status was examined using nutritional screening tools (Mini-Nutritional Assessment Short Form [MNA-SF], Malnutrition Universal Screening Tool [MUST], Geriatric Nutritional Risk Index [GNRI]) and the European Society of Clinical Nutrition and Metabolism (ESPEN)-defined criteria of malnutrition at admission. Length of hospital stay (LOS) and in-hospital mortality were considered outcomes of hospitalization. Multivariate analyses were performed to detect associations between premorbid TMD consumption and nutritional status and outcomes. RESULTS The mean age of the subjects was 75.9±7.0 years, including 58% males. Overall, 110 (3.1%) patients consuming a premorbid TMD were identified. They were older (p<0.001), had poor nutritional status (lower MNA-SF score [p<0.001] and GNRI value [p<0.001], higher MUST score [p<0.001], and more prevalent ESPEN-defined malnutrition [61.8% vs. 14.0%, p<0.001] than did patients without a TMD. The mortality rate and LOS of patients with TMD was higher (7.3% vs. 2.9%, p=0.017) and longer (19 days vs. 8 days, p<0.001) than those without TMD. Multivariate analyses showed that TMD consumption was independently associated with poor nutritional status and prolonged LOS after adjusting confounders. CONCLUSION Daily consumption of a TMD during the premorbid period affects nutritional status at the time of hospitalization and outcomes. Further studies are necessary to investigate whether nutritional intervention can improve outcomes for people on a TMD.
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Affiliation(s)
- K Maeda
- Keisuke Maeda, M.D., Ph.D., Department of Palliative and Supportive Medicine, Graduate School of Medicine, Aichi Medical University, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan, Phone: +81-561-62-3311; Fax: +81-561-78-6364, E-mail:
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31
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Harimoto N, Nakagawara H, Shirabe K, Yoshizumi T, Itoh S, Ikegami T, Soejima Y, Maehara Y, Ishida Y, Tateno C, Tanaka Y. Functional Analysis of Human Hepatocytes Isolated From Chimeric Mouse Liver. Transplant Proc 2018; 50:3858-3862. [PMID: 30577278 DOI: 10.1016/j.transproceed.2018.06.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 06/07/2018] [Accepted: 06/27/2018] [Indexed: 10/28/2022]
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32
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Ishida Y, Otsuka A, Kabashima K. Comments to: skin findings of twenty‐first‐century movie response. J Eur Acad Dermatol Venereol 2018; 32:e425. [DOI: 10.1111/jdv.15013] [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: 11/26/2022]
Affiliation(s)
- Y. Ishida
- Department of Dermatology Kyoto University Graduate School of Medicine Kyoto Japan
| | - A. Otsuka
- Department of Dermatology Kyoto University Graduate School of Medicine Kyoto Japan
| | - K. Kabashima
- Department of Dermatology Kyoto University Graduate School of Medicine Kyoto Japan
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33
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Onoe T, Murayama S, Harada H, Ito Y, Yasui K, Nakura A, Maki S, Ogawa H, Asakura H, Nishimura T, Katagiri H, Takahashi M, Ishida Y. Efficacy of Proton Beam Radiation Therapy and Chemotherapy in Patients with Ewing Sarcoma Family of Tumors of the Trunk. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Ishida Y, Otsuka A, Honda T, Asao Y, Sekiguchi H, Yoshikawa A, Yagi T, Kabashima K. Photoacoustic imaging system visualizes restoration of peripheral oxygenation in psoriatic lesions. J Eur Acad Dermatol Venereol 2018; 32:e449-e451. [DOI: 10.1111/jdv.15032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Ishida
- Department of Dermatology; Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - A. Otsuka
- Department of Dermatology; Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - T. Honda
- Department of Dermatology; Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - Y. Asao
- Department of Breast Surgery; Graduate School of Medicine; Kyoto University; Kyoto Japan
- ImPACT program; Cabinet Office; Japan Science and Technology Agency; Tokyo Japan
| | - H. Sekiguchi
- Department of Diagnostic Imaging and Nuclear Medicine; Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - A. Yoshikawa
- Department of Breast Surgery; Graduate School of Medicine; Kyoto University; Kyoto Japan
| | - T. Yagi
- ImPACT program; Cabinet Office; Japan Science and Technology Agency; Tokyo Japan
| | - K. Kabashima
- Department of Dermatology; Graduate School of Medicine; Kyoto University; Kyoto Japan
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35
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Naito Y, Kawahara A, Okabe Y, Ishida Y, Sadashima E, Murata K, Takase Y, Abe H, Yamaguchi T, Tanigawa M, Mihara Y, Kondo R, Kusano H, Nakayama M, Shimamatsu K, Yano H, Akiba J. SurePath ® LBC improves the diagnostic accuracy of intrahepatic and hilar cholangiocarcinoma. Cytopathology 2018; 29:349-354. [PMID: 29723910 DOI: 10.1111/cyt.12565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/03/2018] [Indexed: 01/22/2023]
Abstract
INTRODUCTION The current study aimed to compare cytology using SurePath® (SP)-LBC and biliary tissue histology (BTH) for the diagnosis of biliary disease. METHODS Between January 2014 and December 2016, 57 patients underwent endoscopic retrograde cholangiopancreatography for the diagnosis of biliary disease. Biliary cytological samples were processed using SP-LBC and subsequently BTH was performed. A final diagnosis was confirmed by surgery (23 malignant cases) and clinical follow-up (34 benign and malignant cases): 18 extrahepatic cholangiocarcinoma; 17 intrahepatic/hilar cholangiocarcinoma (intra/H-CC); eight other malignant disease; and 14 benign biliary disease. The diagnoses made using SP-LBC and BTH were classified into four categories: (1) benign; (2) indeterminate; (3) suspicious for malignancy/malignant; and (4) inadequate. In addition, diagnostic accuracy was compared between SP-LBC and BTH. RESULTS Although 23% (13/57) of BTH samples were classified as inadequate, all SP-LBC cases were classified as adequate. Among 43 malignant cases, 11 normal, four indeterminate and 28 suspicious for malignancy/malignant were found using SP-LBC (26%, 9% and 65%, respectively), in contrast to 10 inadequate, nine normal, 10 indeterminate and 14 suspicious for malignancy/malignant observed using BTH (23%, 21%, 23%, and 33%, respectively). The identification of malignant cells was strikingly different between SP-LBC and BTH. Furthermore, limited to intra/H-CC, accuracy was significantly higher using SP-LBC than using BTH (P < .001). CONCLUSIONS SP-LBC of the biliary tract is a useful and reliable method for diagnosing biliary malignant disease and has an advantage over BTH for detecting malignant cells and accurately diagnosing intra/H-CC.
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Affiliation(s)
- Y Naito
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan.,Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - A Kawahara
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Y Okabe
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Y Ishida
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - E Sadashima
- Shin-Koga Hospital, Medical Corporation Tenjinkai, Kurume, Japan
| | - K Murata
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Y Takase
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - H Abe
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - T Yamaguchi
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - M Tanigawa
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - Y Mihara
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - R Kondo
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - H Kusano
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - M Nakayama
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - K Shimamatsu
- Department of Pathology, Omuta City Hospital, Omuta, Japan
| | - H Yano
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - J Akiba
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
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Ishida Y, Shin S. Publisher's Note: "Functions to map photoelectron distributions in a variety of setups in angle-resolved photoemission spectroscopy" [Rev. Sci. Instrum. 89, 043903 (2018)]. Rev Sci Instrum 2018; 89:059901. [PMID: 29864840 DOI: 10.1063/1.5038560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Y Ishida
- ISSP, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - S Shin
- ISSP, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
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37
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Ishida Y, Iga N, Otsuka A, Kabashima K. 131 Mutational landscape of extramammary Paget disease. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.136] [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: 10/17/2022]
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Tokoyoda M, Adachi S, Ishida Y, Yamazaki K. Osteosarcoma mimic in the breast: A recurrent malignant phyllodes tumour harbouring MED12 and hTERT mutations. Cytopathology 2018; 29:383-385. [PMID: 29633481 DOI: 10.1111/cyt.12544] [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] [Accepted: 02/08/2018] [Indexed: 11/28/2022]
Affiliation(s)
- M Tokoyoda
- Department of Surgical Pathology, Chiba Medical Center, Teikyo University, Ichihara, Japan
| | - S Adachi
- Department of Surgical Pathology, Chiba Medical Center, Teikyo University, Ichihara, Japan
| | - Y Ishida
- Department of Surgical Pathology, Chiba Medical Center, Teikyo University, Ichihara, Japan
| | - K Yamazaki
- Department of Surgical Pathology, Chiba Medical Center, Teikyo University, Ichihara, Japan
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Ishida Y, Shin S. Functions to map photoelectron distributions in a variety of setups in angle-resolved photoemission spectroscopy. Rev Sci Instrum 2018; 89:043903. [PMID: 29716365 DOI: 10.1063/1.5007226] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The distribution of photoelectrons acquired in angle-resolved photoemission spectroscopy can be mapped onto the energy-momentum space of the Bloch electrons in the crystal. The explicit forms of the mapping function f depend on the configuration of the apparatus as well as on the type of the photoelectron analyzer. We show that the existence of the analytic forms of f-1 is guaranteed in a variety of setups. The variety includes the case when the analyzer is equipped with a photoelectron deflector. Thereby, we provide a demonstrative mapping program implemented by an algorithm that utilizes both f and f-1. The mapping methodology is also usable in other spectroscopic methods such as momentum-resolved electron-energy loss spectroscopy.
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Affiliation(s)
- Y Ishida
- ISSP, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - S Shin
- ISSP, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
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40
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Okamoto M, Ishida Y, Keogh A, Strain A. Evaluation of the Function of Primary Human Hepatocytes Co-Cultured with the Human Hepatic Stellate Cell (HSC) Line LI90. Int J Artif Organs 2018. [DOI: 10.1177/039139889802100607] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Most bioartificial liver devices utilise primary hepatocytes alone although some have considered the use of non parenchymal cells in addition. However the effects of co-culture of human hepatocytes with different sinusoidal cell types has not been fully investigated. In this study we have examined the influence of co-culturing primary human hepatocytes with the human hepatic stellate cell (HSC) line, LI90. Cultures were monitored by light microscopy and on days 4, 8 and 14 urea synthesis and cytochrome P450 activity were measured. Morphologically LI90 cells proliferated to fill spaces between and into adjacent islands of hepatocytes. On day 14 cytochrome P450 activity in co-culture was significantly improved compared to hepatocytes cultured alone. By contrast, urea synthesis in hepatocytes was unaffected by single or co-culture. Therefore it can be concluded that a combination of primary human hepatocytes with LI90 cells is beneficial for growth and some stability of hepatocytes and may therefore be appropriate for seeding bioartificial liver devices.
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Affiliation(s)
- M. Okamoto
- Liver Research Laboratories, Queen Elizabeth Hospital, Edgbaston Birmingham - UK
| | - Y. Ishida
- Liver Research Laboratories, Queen Elizabeth Hospital, Edgbaston Birmingham - UK
| | - A. Keogh
- Liver Research Laboratories, Queen Elizabeth Hospital, Edgbaston Birmingham - UK
| | - A. Strain
- Liver Research Laboratories, Queen Elizabeth Hospital, Edgbaston Birmingham - UK
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41
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Kitamura S, Yanagi T, Inamura-Takashima Y, Imafuku K, Hata H, Uehara J, Ishida Y, Otsuka A, Hirata K, Shimizu H. Retrospective study on the correlation between 18-fluorodeoxyglucose uptake in positron emission tomography-computer tomography and tumour volume, cytological activity as assessed with Ki-67 and GLUT-1 staining in 10 cases of Merkel cell carcinoma. J Eur Acad Dermatol Venereol 2018; 32:e285-e287. [PMID: 29377285 DOI: 10.1111/jdv.14821] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- S Kitamura
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
| | - T Yanagi
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
| | - Y Inamura-Takashima
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
| | - K Imafuku
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
| | - H Hata
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
| | - J Uehara
- Department of Dermatology, Asahikawa University Graduate School of Medicine, Midorigaoka-Higashi 2-1-1-1, Asahikawa, 078-8510, Japan
| | - Y Ishida
- Department of Dermatology, Kyoto University Graduate School of Medicine, Shogoin-Kawara, Sakyo, Kyoto, 606-8507, Japan
| | - A Otsuka
- Department of Dermatology, Kyoto University Graduate School of Medicine, Shogoin-Kawara, Sakyo, Kyoto, 606-8507, Japan
| | - K Hirata
- Department of Nuclear Medicine, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
| | - H Shimizu
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo, 060-8638, Japan
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Oka H, Ishida Y, Hong G, Nguyen PTT. Perceptions of dental students in Japanese national universities about studying abroad. Eur J Dent Educ 2018; 22:e1-e6. [PMID: 27246258 DOI: 10.1111/eje.12212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/03/2016] [Indexed: 06/05/2023]
Abstract
PURPOSE Dental faculties in Japan have organised many short-term international exchange programs to enable their undergraduates to study abroad. However, not many students apply for those programs. In this present study, we attempted to clarify the factors that discourage undergraduate dental students from studying abroad. METHODS We administered a questionnaire survey to 512 undergraduate dental students in three national universities located in different areas in Japan. RESULTS Although 61.7% of the participants expressed interest in studying abroad, only 19.1% of them had prior experiences of study abroad or plans to do so. Their main worries were about lack of sufficient language ability in academic fields. Comparing those who were interested in studying abroad with those who were not revealed significant differences regarding their concern about lack of language ability and lack of specialised knowledge in dentistry. Participants who did not want to study abroad indicated that they did not perceive a purpose in doing so and cited not having foreign friends as a problem. Household income was significantly correlated with concerns about overall expenses. CONCLUSION Overall, language ability and academic knowledge appeared to be the two strongest factors affecting dental students' consideration of studying abroad. Dental schools in Japan can use the findings of this study to improve their undergraduate exchange programs in such a way as to stimulate greater interest amongst their students.
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Affiliation(s)
- H Oka
- Department of International Collaboration Development for Dentistry, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Y Ishida
- Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - G Hong
- Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, Miyagi, Japan
| | - P T T Nguyen
- Department of International Collaboration Development for Dentistry, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
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Sumida K, Ishida Y, Zhu S, Ye M, Pertsova A, Triola C, Kokh KA, Tereshchenko OE, Balatsky AV, Shin S, Kimura A. Prolonged duration of nonequilibrated Dirac fermions in neutral topological insulators. Sci Rep 2017; 7:14080. [PMID: 29074864 PMCID: PMC5658381 DOI: 10.1038/s41598-017-14308-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 10/09/2017] [Indexed: 12/03/2022] Open
Abstract
Topological insulators (TIs) possess spin-polarized Dirac fermions on their surface but their unique properties are often masked by residual carriers in the bulk. Recently, (Sb1−xBix)2Te3 was introduced as a non-metallic TI whose carrier type can be tuned from n to p across the charge neutrality point. By using time- and angle-resolved photoemission spectroscopy, we investigate the ultrafast carrier dynamics in the series of (Sb1−xBix)2Te3. The Dirac electronic recovery of ∼10 ps at most in the bulk-metallic regime elongated to >400 ps when the charge neutrality point was approached. The prolonged nonequilibration is attributed to the closeness of the Fermi level to the Dirac point and to the high insulation of the bulk. We also discuss the feasibility of observing excitonic instability of (Sb1−xBix)2Te3.
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Affiliation(s)
- K Sumida
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.
| | - Y Ishida
- ISSP, University of Tokyo, 5-1-5, Kashiwa-no-ha, Chiba 277-8581, Japan.
| | - S Zhu
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - M Ye
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Chang Ning Road, Shanghai 200050, China
| | - A Pertsova
- Nordita, Roslagstullsbacken 23, SE-106 91, Stockholm, Sweden.,Center for Quantum Materials (CQM), KTH and Nordita, Stockholm, Sweden
| | - C Triola
- Nordita, Roslagstullsbacken 23, SE-106 91, Stockholm, Sweden.,Center for Quantum Materials (CQM), KTH and Nordita, Stockholm, Sweden
| | - K A Kokh
- Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Koptyuga pr. 3, 630090, Novosibirsk, Russia.,Novosibirsk State University, ul. Pirogova 2, 630090, Novosibirsk, Russia.,Saint Petersburg State University, Saint Petersburg, 198504, Russia
| | - O E Tereshchenko
- Novosibirsk State University, ul. Pirogova 2, 630090, Novosibirsk, Russia.,Saint Petersburg State University, Saint Petersburg, 198504, Russia.,Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent'eva 13, 630090, Novosibirsk, Russia
| | - A V Balatsky
- Nordita, Roslagstullsbacken 23, SE-106 91, Stockholm, Sweden.,Center for Quantum Materials (CQM), KTH and Nordita, Stockholm, Sweden.,Institute for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA.,ETH Institute for Theoretical Studies, ETH Zurich, 8092 Zurich, Switzerland.,Department of Physics, University of Connecticut, Storrs, CT 06269, USA
| | - S Shin
- ISSP, University of Tokyo, 5-1-5, Kashiwa-no-ha, Chiba 277-8581, Japan
| | - A Kimura
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.
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44
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Murata K, Akiyama R, Noro I, Nishio A, Nakagawa S, Yoshioka Y, Deguchi T, Matsuda H, Ishida Y. Search for effective plant materials for Alzheimer's disease. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608412] [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: 10/18/2022]
Affiliation(s)
- K Murata
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - R Akiyama
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - I Noro
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - A Nishio
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - S Nakagawa
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | | | - T Deguchi
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - H Matsuda
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - Y Ishida
- Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
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45
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Annett LE, Torres EM, Clarke DJ, Ishida Y, Barker RA, Ridley RM, Baker HF, Dunnett SB. Survival of Nigral Grafts within the Striatum of Marmosets with 6-Ohda Lesions Depends Critically on Donor Embryo Age. Cell Transplant 2017; 6:557-69. [PMID: 9440865 DOI: 10.1177/096368979700600606] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The study examined the importance of embryonic donor age for the survival of nigral grafts in 6-OHDA–lesioned marmosets. The issue as to whether donor age is critical for the survival of nigral grafts in primates is controversial, because several early reports suggested that relatively old tissue could survive transplantation and produce functional benefits in monkeys, in contrast to the restrictive time dependence observed in rodents. Embryonic marmoset donors embryos of three different ages were employed: 1) E74 (Carnegie stage 18-19); 2) E83-84 (Carnegie stage 23+); 3) E92-93 (foetal period). The nigral neurons derived from the ventral mesencephalon in the two older donor age groups did not survive well when grafted to the striatum of adult marmosets with unilateral 6-OHDA lesions. Although a few tyrosine hydroxylase (TH+) neurons could be identified by immunohistochemistry at graft sites in all recipients in older donor age groups, the numbers of surviving neurons in these were small, on average typically less than 100 TH+ cells. These small grafts were not sufficient to affect amphetamine-induced rotation. In contrast, many more TH+ cells typically survived transplantation in the recipients; of graft tissue derived from the youngest donors and amphetamine-induced rotation was significantly reduced in this group alone. The time course and extent of the reduction in rotation was remarkably similar to that observed in previous marmoset nigral graft studies, confirming the utility of amphetamine-induced rotation as a sensitive and reliable indicator of nigral graft function in this species. Considering these results and other recent evidence from monkey to monkey, human to rat, and human to human graft studies, the survival of embryonic nigral tissues derived from primate donors transplanted into the striatum does appear to be critically dependent on the age of the donor tissue.
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Affiliation(s)
- L E Annett
- Department of Experimental Psychology, University of Cambridge, UK
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46
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Wakiyama S, Takano Y, Shiba H, Gocho T, Sakamoto T, Ishida Y, Yanaga K. Significance of Portal Venous Velocity in Short-term Graft Function in Living Donor Liver Transplantation. Transplant Proc 2017; 49:1087-1091. [PMID: 28583533 DOI: 10.1016/j.transproceed.2017.03.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
BACKGROUND Graft regeneration and functional recovery after reperfusion of transplanted graft are very important for successful living donor liver transplantation (LDLT). The aim of this study was to evaluate the significance of postoperative portal venous velocity (PVV) in short-term recovery of graft function in LDLT. PATIENTS AND METHODS From February 2007 through December 2015, we performed 17 primary LDLTs, which were included in the present study. The patients ranged in age from 12 to 65 years (mean: 50 years), and 11 were female patients. Postoperatively, Doppler ultrasonography was performed daily to measure PVV (cm/s), and liver function parameters were measured daily. The change in PVV (ΔPVV) was defined as follows: ΔPVV = PVV on postoperative day (POD) 1 - PVV on POD 7. Maximal value of serum aspartate aminotransferase (ASTmax) and maximal value of serum alanine transaminase (ALTmax) at 24 hours after graft reperfusion were used as parameters of reperfusion injury. Correlation analyses were performed as follows: (1) correlation of ΔPVV and PVV on POD 1 (PVV-POD 1) with the values such as ASTmax, ALTmax, other liver function parameters on POD 7 and graft regeneration rate; (2) correlation of ASTmax and ALTmax with other liver function parameters on POD 7. RESULTS ΔPVV significantly correlated with the values of serum total bilirubin (P < .01), prothrombin time (P < .01), and platelet count (P < .05), and PVV-POD 1 significantly correlated with the values of serum total bilirubin (P < .05) and prothrombin time (P < .05). CONCLUSION ΔPVV and PVV-POD 1 may be useful parameters of short-term functional recovery of the transplant liver in LDLT.
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Affiliation(s)
- S Wakiyama
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan.
| | - Y Takano
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - H Shiba
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - T Gocho
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - T Sakamoto
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Y Ishida
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - K Yanaga
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
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47
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Sasaki S, Horiuchi D, Ishida Y, Shoji Y, Kinjo T, Nishizaki K, Kimura M. P1491Usefulness of the wearable cardioverter-defibrillator in acute-phase in-hospital care of patients at high risk of sudden cardiac death: single-center Japanese experience. Europace 2017. [DOI: 10.1093/ehjci/eux158.117] [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: 11/12/2022] Open
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48
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Kimura M, Horiuchi D, Sasaki K, Ishida Y, Kinjo T, Shoji Y, Sasaki S. P1456Plotted pulmonary vein antrum partition mapping: a novel maneuver to detect and eliminate residual conduction gaps in an ablation line. Europace 2017. [DOI: 10.1093/ehjci/eux158.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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49
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Zhang P, Ma JZ, Ishida Y, Zhao LX, Xu QN, Lv BQ, Yaji K, Chen GF, Weng HM, Dai X, Fang Z, Chen XQ, Fu L, Qian T, Ding H, Shin S. Topologically Entangled Rashba-Split Shockley States on the Surface of Grey Arsenic. Phys Rev Lett 2017; 118:046802. [PMID: 28186797 DOI: 10.1103/physrevlett.118.046802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Indexed: 06/06/2023]
Abstract
We discover a pair of spin-polarized surface bands on the (111) face of grey arsenic by using angle-resolved photoemission spectroscopy (ARPES). In the occupied side, the pair resembles typical nearly-free-electron Shockley states observed on noble-metal surfaces. However, pump-probe ARPES reveals that the spin-polarized pair traverses the bulk band gap and that the crossing of the pair at Γ[over ¯] is topologically unavoidable. First-principles calculations well reproduce the bands and their nontrivial topology; the calculations also support that the surface states are of Shockley type because they arise from a band inversion caused by crystal field. The results provide compelling evidence that topological Shockley states are realized on As(111).
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Affiliation(s)
- Peng Zhang
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - J-Z Ma
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Ishida
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - L-X Zhao
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Q-N Xu
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - B-Q Lv
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - K Yaji
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - G-F Chen
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - H-M Weng
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - X Dai
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - Z Fang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - X-Q Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
| | - L Fu
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Qian
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - H Ding
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - S Shin
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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50
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Ishida Y, Otsu T, Ozawa A, Yaji K, Tani S, Shin S, Kobayashi Y. High repetition pump-and-probe photoemission spectroscopy based on a compact fiber laser system. Rev Sci Instrum 2016; 87:123902. [PMID: 28040935 DOI: 10.1063/1.4969053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The paper describes a time-resolved photoemission (TRPES) apparatus equipped with a Yb-doped fiber laser system delivering 1.2-eV pump and 5.9-eV probe pulses at the repetition rate of 95 MHz. Time and energy resolutions are 11.3 meV and ∼310 fs, respectively, the latter is estimated by performing TRPES on a highly oriented pyrolytic graphite (HOPG). The high repetition rate is suited for achieving high signal-to-noise ratio in TRPES spectra, thereby facilitating investigations of ultrafast electronic dynamics in the low pump fluence (p) region. TRPES of polycrystalline bismuth (Bi) at p as low as 30 nJ/mm2 is demonstrated. The laser source is compact and is docked to an existing TRPES apparatus based on a 250-kHz Ti:sapphire laser system. The 95-MHz system is less prone to space-charge broadening effects compared to the 250-kHz system, which we explicitly show in a systematic probe-power dependency of the Fermi cutoff of polycrystalline gold. We also describe that the TRPES response of an oriented Bi(111)/HOPG sample is useful for fine-tuning the spatial overlap of the pump and probe beams even when p is as low as 30 nJ/mm2.
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Affiliation(s)
- Y Ishida
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - T Otsu
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - A Ozawa
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - K Yaji
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - S Tani
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - S Shin
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
| | - Y Kobayashi
- ISSP, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
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