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Hosokawa T, Ikoma K, Maki M, Kido M, Hara Y, Sotozono Y, Takahashi K. Relationship between arthritis of the second and third tarsometatarsal joints and incongruity of the first tarsometatarsal joint in patients with hallux valgus. Mod Rheumatol 2024; 34:410-413. [PMID: 36688576 DOI: 10.1093/mr/road009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/12/2022] [Accepted: 01/04/2023] [Indexed: 01/24/2023]
Abstract
OBJECTIVES Hallux valgus is associated with tarsometatarsal arthritis; its pathophysiology remains unknown. Therefore, we aimed to elucidate the relationship between arthritis of the second and third tarsometatarsal joints and incongruity of the first tarsometatarsal joint in the sagittal plane. METHODS Forty-three patients (64 feet) with hallux valgus who underwent surgery at University Hospital Kyoto Prefectural University of Medicine were included and divided into two groups: control (without second and third tarsometatarsal joint degeneration) and osteoarthritis (with second and third tarsometatarsal joint degeneration). Intergroup comparisons of the incongruity of the first tarsometatarsal joint in the sagittal plane, age, body mass index, hallux valgus angle, first-second intermetatarsal angle, metatarsus adductus angle, Meary's angle, and calcaneal pitch angle were performed. RESULTS The proportion of patients with incongruity of the first tarsometatarsal joint was significantly higher in the osteoarthritis group than in the control group. Logistic regression analysis identified incongruity of the first tarsometatarsal joint and metatarsus adductus angle as significant related factors for arthritis of the second and third tarsometatarsal joints. CONCLUSIONS Incongruity of the first tarsometatarsal joint in the sagittal plane was involved in the development of arthritis of the second and third tarsometatarsal joints in patients with hallux valgus.
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Affiliation(s)
- Toshihiro Hosokawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuya Ikoma
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masahiro Maki
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masamitsu Kido
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yusuke Hara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yasutaka Sotozono
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kenji Takahashi
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Hosokawa T. Ultrasound imaging for evaluation of impalement-related injuries to the oral cavity in pediatric patients: a case series study. Eur Arch Paediatr Dent 2023; 24:241-248. [PMID: 36696028 DOI: 10.1007/s40368-023-00783-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/16/2023] [Indexed: 01/26/2023]
Abstract
BACK GROUND An impalement-related injury to the oral cavity is common in pediatric patients at emergency department. A computed tomography evaluation is not always suitable in these cases. Herein, we aimed to present oral sonography findings from six pediatric patients presenting with impalement-related injury to the oral cavity. CASE SERIES All included patients were younger than 4 years and sustained injuries with a toothbrush, chopstick, water gun, and fork to the tonsils, submandibular gland area, uvula, and under the tongue. CONCLUSION Ultrasound imaging appeared useful in helping diagnose impalement-related injuries lateral to the midline.
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Affiliation(s)
- T Hosokawa
- Department of Radiology, Saitama Children's Medical Center, 1-2 Shintoshin Chuo-Ku Saitama, Saitama, 330-8777, Japan.
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Okano H, Hano Y, Sugimoto K, Ohira F, Inoue T, Hosokawa T, Iwai T, Takai S, Yabutsuka T, Yao T. Lead acid battery with high resistance to over‐discharge using graphite based materials as cathode current collector. Nano Select 2021. [DOI: 10.1002/nano.202100285] [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: 11/10/2022] Open
Affiliation(s)
- Hiroshi Okano
- National Institute of Technology Kagawa College Takamatsu Kagawa Japan
| | - Yuta Hano
- National Institute of Technology Kagawa College Takamatsu Kagawa Japan
| | - Kaito Sugimoto
- National Institute of Technology Kagawa College Takamatsu Kagawa Japan
| | - Fumiya Ohira
- National Institute of Technology Kagawa College Takamatsu Kagawa Japan
| | | | | | - Taichi Iwai
- Graduate School of Energy Science Kyoto University Sakyo‐ku Kyoto Japan
| | - Shigeomi Takai
- Graduate School of Energy Science Kyoto University Sakyo‐ku Kyoto Japan
| | - Takeshi Yabutsuka
- Graduate School of Energy Science Kyoto University Sakyo‐ku Kyoto Japan
| | - Takeshi Yao
- National Institute of Technology Kagawa College Takamatsu Kagawa Japan
- Graduate School of Energy Science Kyoto University Sakyo‐ku Kyoto Japan
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Komoda S, Hosokawa T, Kinjo K. Evaluation of the mixed-oxide fuel melting limit at low burnups / Ermittlung der Schmelzgrenze für Mischoxid-Brennstoff bei kleinen Abbränden. KERNTECHNIK 2021. [DOI: 10.1515/kern-1990-550220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hosokawa T, Ikoma K, Kido M, Hara Y, Maki M, Ohashi S, Kubo T. Subcutaneous rupture of the flexor hallucis longus tendon at the musculotendinous junction in a soccer player. J Orthop Sci 2021; 26:311-314. [PMID: 30224230 DOI: 10.1016/j.jos.2018.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 07/13/2018] [Accepted: 08/10/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Toshihiro Hosokawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
| | - Kazuya Ikoma
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan.
| | - Masamitsu Kido
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
| | - Yusuke Hara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
| | - Masahiro Maki
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
| | - Suzuyo Ohashi
- Department of Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
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Hosokawa T, Yamada Y, Tanami Y, Sato Y, Tanaka Y, Kawashima H, Oguma E. Complications after Surgical Correction of Anorectal Malformations. Hong Kong Journal of Radiology 2020. [DOI: 10.12809/hkjr2017047] [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: 11/05/2022] Open
Affiliation(s)
- T Hosokawa
- Department of Radiology, Saitama Children’s Medical Center, Saitama, Japan
| | - Y Yamada
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Y Tanami
- Department of Radiology, Saitama Children’s Medical Center, Saitama, Japan
| | - Y Sato
- Department of Radiology, Saitama Children’s Medical Center, Saitama, Japan
| | - Y Tanaka
- Department of Pediatric Surgery, Nagoya University Graduate School of Medicine, Saitama, Japan
| | - H Kawashima
- Department of Surgery, Saitama Children’s Medical Center, Saitama, Japan
| | - E Oguma
- Department of Radiology, Saitama Children’s Medical Center, Saitama, Japan
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Kido M, Ikoma K, Ikeda R, Hosokawa T, Hara Y, Imai K, Maki M, Ohashi S, Mikami Y, Kubo T. Reproducibility of radiographic methods for assessing longitudinal tarsal axes Part 2: Severe cavus or flatfoot study. Foot (Edinb) 2020; 42:101631. [PMID: 31810028 DOI: 10.1016/j.foot.2019.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 05/17/2019] [Accepted: 08/18/2019] [Indexed: 02/04/2023]
Abstract
INTRODUCTION Calcaneal pitch angle and Meary's angle are commonly used to assess longitudinal foot arches on lateral-view radiographs. The aim of this study was to examine and evaluate the radiographic longitudinal foot arch measurement methods with the best intraobserver and interobserver reliabilities for patients with (1) severe cavus deformity and (2) severe flatfoot deformity. METHODS Standing radiographic images of 22feet with severe cavus foot deformity and 49feet with severe flatfoot deformity were obtained to measure the longitudinal axes of the talus, first metatarsal, calcaneus and plantar surface, which were defined using six, five, four and three different methods, respectively, selected from previous reports. Intraobserver and interobserver correlation coefficients were calculated. RESULTS The results are generally consistent with those of Part 1. The best intraobserver and interobserver correlation coefficients for the tarsal axes were obtained using methods involving a line bisecting the angle formed by the lines tangential to the superior and inferior margins of the talus, a line connecting the centre of the first metatarsal head and the midpoint of the visualized base of the first metatarsal, and a line drawn tangential to the inferior surface of the calcaneus. For the plantar axis, a method that used the horizontal plane (as a reference axis) was regarded as the best approach. CONCLUSIONS The aforementioned methods were considered to be optimal for the radiographic assessment of longitudinal foot arches in patients with severe cavus or flatfoot deformity. This study may contribute to the more accurate assessment of any foot deformity.
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Affiliation(s)
- Masamitsu Kido
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Kazuya Ikoma
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
| | - Ryosuke Ikeda
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Toshihiro Hosokawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Yusuke Hara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Kan Imai
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Masahiro Maki
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Suzuyo Ohashi
- Department of Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Yasuo Mikami
- Department of Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
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Kido M, Ikoma K, Ikeda R, Hosokawa T, Hara Y, Imai K, Maki M, Ohashi S, Mikami Y, Kubo T. Reproducibility of radiographic methods for assessing longitudinal tarsal axes: Part 1: Consecutive case study. Foot (Edinb) 2019; 40:1-7. [PMID: 30978533 DOI: 10.1016/j.foot.2019.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/26/2019] [Accepted: 03/11/2019] [Indexed: 02/04/2023]
Abstract
INTRODUCTION Calcaneal pitch angle and Meary's angle are commonly used to assess longitudinal foot arches on lateral-view radiographs. However, the methods used to obtain the talar, first metatarsal, calcaneal, and plantar axes differ across multiple reports, and no study has evaluated the reproducibility of these approaches. The aim of this study was to determine the most reproducible methods for radiographically evaluating longitudinal axes. METHODS Standing radiographic images of 40 feet from 21 consecutive outpatients were obtained to measure longitudinal axes of the talus, first metatarsal, calcaneus and plantar surface, which were defined using six, five, four and three different methods, respectively, selected from previous reports. Intraobserver and interobserver correlation coefficients were calculated. RESULTS The best intraobserver and interobserver correlation coefficients for the talar, first metatarsal, and calcaneal axes were obtained using methods involving a line bisecting the angle formed by the lines tangential to the superior and inferior margins of the talus, a line connecting the centre of the first metatarsal head and the midpoint of the visualized base of the first metatarsal, and a line drawn tangential to the inferior surface of the calcaneus, respectively. For the plantar axis, a method that used the horizontal plane (as a reference axis) was regarded as the best approach, although intraobserver and interobserver correlation coefficients could not be calculated because all values were zero. CONCLUSIONS The aforementioned methods were considered to be optimal for the radiographic assessment of longitudinal foot arches. This study could contribute to more accurate assessments of foot deformities.
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Affiliation(s)
- Masamitsu Kido
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Kazuya Ikoma
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
| | - Ryosuke Ikeda
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Toshihiro Hosokawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Yusuke Hara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Kan Imai
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Masahiro Maki
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Suzuyo Ohashi
- Department of Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Yasuo Mikami
- Department of Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
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Kido M, Ikoma K, Hosokawa T, Imai K, Maki M, Ohashi S, Kubo T. Reproducible measurements for radiographically assessing longitudinal tarsal axes of severe cavus or flatfoot deformity. Foot & Ankle Orthopaedics 2018. [DOI: 10.1177/2473011418s00287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Category: Other Introduction/Purpose: Calcaneal pitch and Meary’s angles are commonly used to assess longitudinal foot arches on lateral-view radiographs. Several different methods have been described in literatures to obtain the talar, first metatarsal, calcaneal, and plantar axes, but their reliability and reproducibility still remain to be evaluated. The aim of this study was to determine the most reproducible methods for radiographically evaluating the longitudinal axes. Methods: Standing radiographic images of 40 feet from consecutive outpatients, 22 feet with a severe cavus deformity and 48 feet with a severe flatfoot deformity, were obtained to measure the longitudinal axes of the talus, first metatarsal, calcaneus and plantar surface by using six, five, four and three different methods, respectively, that were described in the previous reports (Figure). Interobserver and intraobserver correlation coefficients were calculated by three observers. Results: The best interobserver and intraobserver correlation coefficients were obtained for methods that used a line bisecting the angle formed by the lines tangential to the superior and inferior margins of the talus (Method B), a line connecting the center of the first metatarsal head and the midpoint of the visualized base of the first metatarsal (Method J), and a line drawn tangential to the inferior surface of the calcaneus (Method L). For the plantar axis, the method that used the horizontal plane [reference axis] was considered the best. Conclusion: The above mentioned methods were considered ideal for the radiographic assessment of longitudinal foot arches, even in severely deformed feet. This study could contribute to standardized assessments of foot deformities.
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Ishida S, Unoda K, Yamane K, Hosokawa T, Nakajima H, Kimura F, Sugino M, Arawaka S. Early morning off symptom in patients with Parkinson disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1000] [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: 10/18/2022]
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Kakiuchi K, Motoki M, Sano E, Ota S, Unoda K, Hosokawa T, Ishida S, Nakajima H, Kimura F, Arawaka S. Evaluation of muscle MRI pattern in neuromuscular disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1719] [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: 10/18/2022]
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Sasaki M, Ueno H, Omae K, Goto T, Murohisa G, Mizuno N, Ozaka M, Kobayashi S, Uesugi K, Kobayashi N, Hayashi H, Sudo K, Okano N, Horita Y, Kamei K, Hosokawa T, Henmi T, Kobayashi M, Todaka A, Fukutomi A. Risk factors for febrile neutropenia (FN) in unresectable/recurrent pancreatic cancer(PC) patients(pts) receiving FOLFIRINOX (FFX) from JASPAC06 study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx369.142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hosokawa T, Arai Y, Nakagawa S, Kubo T. Total knee arthroplasty with corrective osteotomy for knee osteoarthritis associated with malunion after tibial plateau fracture: a case report. BMC Res Notes 2017. [PMID: 28651579 PMCID: PMC5485551 DOI: 10.1186/s13104-017-2553-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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] [Indexed: 11/29/2022] Open
Abstract
Background When surgeons perform total knee arthroplasty in patients with knee osteoarthritis due to malunion following fractures around the knee joint, corrective osteotomy is recommended for severe deformities. Most such deformities are coronal plane varus or valgus deformities, and reports of sagittal plane flexion or extension deformities are rare. We describe a case in which a one-stage total knee arthroplasty was performed with extension corrective osteotomy in the sagittal plane. Case presentation A 71-year-old Japanese man presented with left knee pain. He had knee osteoarthritis associated with malunion after a tibial plateau fracture. Plain radiography showed a varus deformity in the coronal plane and a marked flexion deformity in the sagittal plane. We performed total knee arthroplasty concurrently with extension corrective osteotomy using a long stem. Full weight bearing was permitted at 6 weeks postoperatively, and the patient was able to walk without assistance. Conclusions This surgical method appears to be beneficial for shortening the duration of treatment and improving knee function.
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Affiliation(s)
- Toshihiro Hosokawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yuji Arai
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan.
| | - Shuji Nakagawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
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Hosokawa T, Oda R, Toyama S, Taniguchi D, Tokunaga D, Fujiwara H, Kubo T. Spontaneous flexor tendon rupture due to an insufficiency fracture of the hamate hook in a patient with systemic lupus erythematosus: A case report. Int J Surg Case Rep 2016; 27:63-65. [PMID: 27552031 PMCID: PMC4995535 DOI: 10.1016/j.ijscr.2016.06.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/30/2016] [Accepted: 06/30/2016] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Spontaneous flexor tendon rupture is usually caused by trauma, systemic diseases, or carpal bone and joint disorders. Here we report a case of spontaneous flexor tendon rupture occurring in a systemic lupus erythematosus (SLE) patient following nonunion of the hamate hook after an insufficiency fracture, and which was also associated with tendon degeneration caused by SLE. CASE PRESENTATION A 57-year-old woman was diagnosed with SLE 22 years ago and being treated with oral prednisolone. She became unable to flex her left little finger without any history of trauma or sporting activity. CT showed nonunion of the hamate hook. MRI showed rupture of the flexor digitorum profundus tendon of the little finger. We performed tendon transfer and excision of the hamate hook. She recovered active flexion of the little finger at 4 months postoperatively with full satisfaction. DISCUSSION There was no history of trauma that could have caused nonunion of the hamate hook. We considered that the insufficiency fracture of the hamate hook occurred as a result of osteoporosis caused by SLE and long-term steroid use. Nonunion of the hamate hook caused mechanical attrition of the tendons, and in combination with the tendon degeneration caused by SLE, further resulted in rupture of the flexor tendon. CONCLUSION When we encounter a case of spontaneous flexor tendon rupture in a patient with systemic disease such as SLE or long-term steroid use, attention should be paid to the state of the carpal bones and joints as they sometimes accompany unexpected causes.
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Affiliation(s)
- Toshihiro Hosokawa
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Ryo Oda
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Shogo Toyama
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Daigo Taniguchi
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Daisaku Tokunaga
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Hiroyoshi Fujiwara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
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Kunimoto T, Okubo N, Minami Y, Fujiwara H, Hosokawa T, Asada M, Oda R, Kubo T, Yagita K. A PTH-responsive circadian clock operates in ex vivo mouse femur fracture healing site. Sci Rep 2016; 6:22409. [PMID: 26926165 PMCID: PMC4772627 DOI: 10.1038/srep22409] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 02/12/2016] [Indexed: 01/10/2023] Open
Abstract
The circadian clock contains clock genes including Bmal1 and Period2, and it maintains an interval rhythm of approximately 24 hours (the circadian rhythm) in various organs including growth plate and articular cartilage. As endochondral ossification is involved not only in growth plate but also in fracture healing, we investigated the circadian clock functions in fracture sites undergoing healing. Our fracture models using external fixation involved femurs of Period2::Luciferase knock-in mice which enables the monitoring of endogenous circadian clock state via bioluminescence. Organ culture was performed by collecting femurs, and fracture sites were observed using bioluminescence imaging systems. Clear bioluminescence rhythms of 24-hour intervals were revealed in fracture healing sites. When parathyroid hormone (PTH) was administered to fractured femurs in organ culture, peak time of Period2::Luciferase activity in fracture sites and growth plates changed, indicating that PTH-responsive circadian clock functions in the mouse femur fracture healing site. While PTH is widely used in treating osteoporosis, many studies have reported that it contributes to improvement of fracture healing. Future studies of the role of this local clock in wound healing may reveal a novel function of the circadian timing mechanism in skeletal cells.
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Affiliation(s)
- Tatsuya Kunimoto
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Naoki Okubo
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoichi Minami
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroyoshi Fujiwara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Toshihiro Hosokawa
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Maki Asada
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ryo Oda
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuhiro Yagita
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Hosokawa T, Tsuchiya Y, Okubo N, Kunimoto T, Minami Y, Fujiwara H, Umemura Y, Koike N, Kubo T, Yagita K. Robust Circadian Rhythm and Parathyroid Hormone-Induced Resetting during Hypertrophic Differentiation in ATDC5 Chondroprogenitor Cells. Acta Histochem Cytochem 2015; 48:165-71. [PMID: 26855448 PMCID: PMC4731854 DOI: 10.1267/ahc.15025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 07/28/2015] [Accepted: 09/04/2015] [Indexed: 11/22/2022] Open
Abstract
Cartilage tissues possess intrinsic circadian oscillators, which influence chondrocyte function and chondrocyte specific gene expression. However, it is not fully understood how chondrogenesis influences the circadian clock, and vice versa. Thus, we established ATDC5 cells which were stably transfected with the Bmal1:luc reporter and revealed robust circadian rhythms in ATDC5 cells during differentiation. Moreover, the circadian clock in ATDC5 cells was strongly reset by PTH in a circadian time-dependent manner. This assay system is expected to be useful for investigating the role of the circadian clock in chondrogenic differentiation and the precise molecular mechanisms underlying PTH action on the chondrocyte circadian clock.
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Affiliation(s)
- Toshihiro Hosokawa
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Yoshiki Tsuchiya
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
| | - Naoki Okubo
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Tatsuya Kunimoto
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Yoichi Minami
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Hiroyoshi Fujiwara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Yasuhiro Umemura
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
| | - Nobuya Koike
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
| | - Toshikazu Kubo
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Kazuhiro Yagita
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
- Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
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Tsuchiya Y, Umemura Y, Minami Y, Koike N, Hosokawa T, Hara M, Ito H, Inokawa H, Yagita K. Effect of Multiple Clock Gene Ablations on the Circadian Period Length and Temperature Compensation in Mammalian Cells. J Biol Rhythms 2015; 31:48-56. [PMID: 26511603 DOI: 10.1177/0748730415613888] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Most organisms have cell-autonomous circadian clocks to coordinate their activity and physiology according to 24-h environmental changes. Despite recent progress in circadian studies, it is not fully understood how the period length and the robustness of mammalian circadian rhythms are determined. In this study, we established a series of mouse embryonic stem cell (ESC) lines with single or multiplex clock gene ablations using the CRISPR/Cas9-based genome editing method. ESC-based in vitro circadian clock formation assay shows that the CRISPR-mediated clock gene disruption not only reproduces the intrinsic circadian molecular rhythms of previously reported mice tissues and cells lacking clock genes but also reveals that complexed mutations, such as CKIδ(m/m):CKIε(+/m):Cry2(m/m) mutants, exhibit an additively lengthened circadian period. By using these mutant cells, we also investigated the relation between period length alteration and temperature compensation. Although CKIδ-deficient cells slightly affected the temperature insensitivity of period length, we demonstrated that the temperature compensation property is largely maintained in all mutants. These results show that the ESC-based assay system could offer a more systematic and comprehensive approach to the genotype-chronotype analysis of the intracellular circadian clockwork in mammals.
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Affiliation(s)
- Yoshiki Tsuchiya
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yasuhiro Umemura
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoichi Minami
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Nobuya Koike
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Toshihiro Hosokawa
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan Department of Orthopedic Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masayuki Hara
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan Department of Nephrology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroshi Ito
- Faculty of Design, Kyushu University, Fukuoka, Japan
| | - Hitoshi Inokawa
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuhiro Yagita
- Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Okubo N, Fujiwara H, Minami Y, Kunimoto T, Hosokawa T, Umemura Y, Inokawa H, Asada M, Oda R, Kubo T, Yagita K. Parathyroid hormone resets the cartilage circadian clock of the organ-cultured murine femur. Acta Orthop 2015; 86:627-31. [PMID: 25765847 PMCID: PMC4564788 DOI: 10.3109/17453674.2015.1029393] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE The circadian clock governs endogenous day-night variations. In bone, the metabolism and growth show diurnal rhythms. The circadian clock is based on a transcription-translation feedback loop composed of clock genes including Period2 (Per2), which encodes the protein period circadian protein homolog 2. Because plasma parathyroid hormone (PTH) levels show diurnal variation, we hypothesized that PTH could carry the time information to bone and cartilage. In this study, we analyzed the effect of PTH on the circadian clock of the femur. PATIENTS AND METHODS Per2::Luciferase (Per2::Luc) knock-in mice were used and their femurs were organ-cultured. The bioluminescence was measured using photomultiplier tube-based real-time bioluminescence monitoring equipment or real-time bioluminescence microscopic imaging devices. PTH or its vehicle was administered and the phase shifts were calculated. Immunohistochemistry was performed to detect PTH type 1 receptor (PTH1R) expression. RESULTS Real-time bioluminescence monitoring revealed that PTH reset the circadian rhythm of the Per2::Luc activity in the femurs in an administration time-dependent and dose-dependent manner. Microscopic bioluminescence imaging revealed that Per2::Luc activity in the growth plate and the articular cartilage showed that the circadian rhythms and their phase shifts were induced by PTH. PTH1R was expressed in the growth plate cartilage. INTERPRETATION In clinical practice, teriparatide (PTH (1-34)) treatment is widely used for osteoporosis. We found that PTH administration regulated the femoral circadian clock oscillation, particularly in the cartilage. Regulation of the local circadian clock by PTH may lead to a more effective treatment for not only osteoporosis but also endochondral ossification in bone growth and fracture repair.
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Affiliation(s)
- Naoki Okubo
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine,2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine,3Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Hiroyoshi Fujiwara
- 2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Yoichi Minami
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine,3Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Tatsuya Kunimoto
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine,2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine,3Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Toshihiro Hosokawa
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine,2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine,3Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Yasuhiro Umemura
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
| | - Hitoshi Inokawa
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
| | - Maki Asada
- 2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Ryo Oda
- 2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine
| | - Toshikazu Kubo
- 2Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine,3Department of Musculoskeletal Chronobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Kazuhiro Yagita
- 1Department of Physiology and Systems Bioscience, Kyoto Prefectural University of Medicine
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Hosokawa T, Takahashi K, Tsuchiya A, Mitsueda S, Tanji N, Saito S, Naito Y. Factors affecting the one-step test in patients after Achilles tendon repair. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Sato K, Tsuchiya A, Hosokawa T, Komatsu E. Incidence for graft rupture and contralateral injury after anatomic double-bundle anterior cruciate ligament reconstruction with hamstring autograft. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Nakamura S, Hosokawa T, Iijima T, Tsutsui K. Different roles of the monkey dorsolateral prefrontal, premotor and posterior parietal cortices in a delayed response task revealed by functional disturbance by on-line rTMS. Brain Stimul 2015. [DOI: 10.1016/j.brs.2015.01.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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22
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Tamaki N, Kurosaki M, Tanaka K, Suzuki Y, Hoshioka Y, Kato T, Yasui Y, Hosokawa T, Ueda K, Tsuchiya K, Nakanishi H, Itakura J, Asahina Y, Izumi N. Noninvasive estimation of fibrosis progression overtime using the FIB-4 index in chronic hepatitis C. J Viral Hepat 2013; 20:72-6. [PMID: 23231087 DOI: 10.1111/j.1365-2893.2012.01635.x] [Citation(s) in RCA: 31] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The FIB-4 index is a simple formula to predict liver fibrosis based on the standard biochemical values (AST, ALT and platelet count) and age. We here investigated the utility of the index for noninvasive prediction of progression in liver fibrosis. The time-course alteration in the liver fibrosis stage between paired liver biopsies and the FIB-4 index was examined in 314 patients with chronic hepatitis C. The average interval between liver biopsies was 4.9 years. The cases that showed a time-course improvement in the fibrosis stage exhibited a decrease in the FIB-4 index, and those that showed deterioration in the fibrosis stage exhibited an increase in the FIB-4 index with a significant correlation (P < 0.001). Increase in the ΔFIB-4 index per year was an independent predictive factor for the progression in liver fibrosis with an odds ratio of 3.90 (P = 0.03). The area under the receiver operating characteristic curve of the ΔFIB-4 index/year for the prediction of advancement to cirrhosis was 0.910. Using a cut-off value of the ΔFIB-4 index/year <0.4 or ≥ 0.4, the cumulative incidence of fibrosis progression to cirrhosis at 5 and 10 years was 34% and 59%, respectively in patients with the ΔFIB-4 index/year ≥0.4, whereas it was 0% and 3% in those with the ΔFIB-4 index/year <0.4 (P < 0.001). In conclusion, measurement of the time-course changes in the FIB-4 index is useful for the noninvasive and real-time estimation of the progression in liver fibrosis.
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Affiliation(s)
- N Tamaki
- Division of Gastroenterology and Hepatology, Musashino Red Cross Hospital, Tokyo, Japan
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Higashi T, Nakamura F, Saruki N, Takegami M, Hosokawa T, Fukuhara S, Nakayama T, Sobue T. Evaluation of Newspaper Articles for Coverage of Public Reporting Data: A Case Study of Unadjusted Cancer Survival Data. Jpn J Clin Oncol 2012; 43:95-100. [DOI: 10.1093/jjco/hys190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Sato K, Hosokawa T, Mitsueda S, Hosaki K, Okuyama M, Okada T, Kanisawa I, Tsuchiya A, Takahashi K, Sakai H. Effects of eccentric hamstring strength exercise on knee flexor strength. Br J Sports Med 2011. [DOI: 10.1136/bjsm.2011.084038.175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hosokawa T, Sato K, Mitsueda S, Umehara H, Hidume K, Okada T, Kanisawa I, Tsuchiya A, Takahashi K, Sakai H. Effects of anterior cruciate ligament injury prevention program on lower extremity alignment, isokinetic muscle strength and electromyographic activity. Br J Sports Med 2011. [DOI: 10.1136/bjsm.2011.084038.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zhou N, Hosokawa T, Suekane T, Wang Q. Experimental study of capillary trapping on the pore scale for various sandstone cores. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.egypro.2011.02.473] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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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28
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Kita Y, Gunji A, Inoue Y, Goto T, Inagaki M, Kaga M, Hosokawa T. P27-13 A hemodynamic study of self-face recognition in autism spectrum disorder (ASD): Relation with ASD severities and self-consciousness. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61086-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Hosokawa T, Kazai K, Katayose H. The validity of the fNIRS recording in the prefrontal cortex for lie detection. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70481-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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30
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Hosokawa T, Kumon Y, Kobayashi T, Enzan H, Takahashi K, Yuri K, Wakiguchi H, Sugiura T. Abstract: P658 NEUTROPHILS INFILTRATION AND GENERATION OF REACTIVE OXYGEN SPECIES IN A HUMAN ATHEROSCLEROTIC PLAQUE. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70826-8] [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: 11/29/2022]
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Narabayashi M, Saijo Y, Takenoshita S, Chida M, Shimoyama N, Miura T, Tani K, Nishimura K, Onozawa Y, Hosokawa T, Kamoto T, Tsushima T. Opioid Rotation from Oral Morphine to Oral Oxycodone in Cancer Patients with Intolerable Adverse Effects: An Open-Label Trial. Jpn J Clin Oncol 2008; 38:296-304. [DOI: 10.1093/jjco/hyn010] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Asahina Y, Izumi N, Umeda N, Hosokawa T, Ueda K, Doi F, Tsuchiya K, Nakanishi H, Matsunaga K, Kitamura T, Kurosaki M, Uchihara M, Higaki M, Miyake S. Pharmacokinetics and enhanced PKR response in patients with chronic hepatitis C treated with pegylated interferon alpha-2b and ribavirin. J Viral Hepat 2007; 14:396-403. [PMID: 17501760 DOI: 10.1111/j.1365-2893.2006.00803.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
This study investigated the molecular and pharmacokinetic mechanisms of the enhanced antiviral efficacy associated with pegylated interferon (PEG-IFN) alpha-2b and ribavirin. The study involved comparing the expression of serial double-stranded RNA-activated protein kinase (PKR) before and during treatment in 26 PEG-IFN alpha-2b and 26 conventional IFN alpha-2b recipients matched for age, body weight and dose of ribavirin. The pharmacokinetics of PEG-IFN alpha-2b and ribavirin was analysed in 15 of the 26 PEG-IFN recipients. There was a rapid increase in PKR expression in both treatment groups, although expression from day 2 onwards was maintained at a significantly higher level in the PEG-IFN recipients (P < 0.05). C(max) of PEG-IFN occurred 12-48 h after the initial administration, with t(1/2) and C(min) being 49 h and 190 pg/mL, respectively. In contrast to ribavirin, accumulation of PEG-IFN was minimal. There was no association between serum PEG-IFN and ribavirin levels and virological response. Although baseline expression of PKR before treatment was marginally higher in nonresponders (NRs), from day 2 onwards, sequential PKR expression in response to PEG-IFN was higher in sustained viral responders compared with the NRs (P < 0.05). Significant correlations were found between kinetics of PKR expression and viral decline rates in each phase of hepatitis C virus dynamics (first phase, r = 0.67, P = 0.0006; second phase, r = 0.67, P = 0.001). In conclusion, improvement in pharmacokinetics following pegylation led to higher intracellular PKR expression, which was associated with enhanced virological efficacy of PEG-IFN-based combination therapy. The concentrations of both ribavirin and PEG-IFN alpha-2b were not associated with viral response and PKR expression.
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MESH Headings
- Administration, Oral
- Adult
- Aged
- Antiviral Agents/administration & dosage
- Antiviral Agents/pharmacokinetics
- Antiviral Agents/therapeutic use
- Cells, Cultured
- Drug Therapy, Combination
- Female
- Gene Expression Regulation/drug effects
- Hepacivirus/isolation & purification
- Hepatitis C, Chronic/drug therapy
- Hepatitis C, Chronic/metabolism
- Hepatitis C, Chronic/virology
- Humans
- Injections, Intramuscular
- Injections, Subcutaneous
- Interferon alpha-2
- Interferon-alpha/administration & dosage
- Interferon-alpha/pharmacokinetics
- Interferon-alpha/therapeutic use
- Leukocytes, Mononuclear/metabolism
- Male
- Middle Aged
- Polyethylene Glycols
- Polymerase Chain Reaction
- RNA, Messenger/genetics
- Recombinant Proteins
- Ribavirin/administration & dosage
- Ribavirin/pharmacokinetics
- Ribavirin/therapeutic use
- Treatment Outcome
- Viral Load
- eIF-2 Kinase/genetics
- eIF-2 Kinase/metabolism
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Affiliation(s)
- Y Asahina
- Department of Gastroenterology and Hepatology, Musashino Red Cross Hospital, Tokyo, Japan
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Uto H, Chiba T, Umezawa K, Hosokawa T, Shinozaki S, Ai M, Konodo K, Shimokado K. Tu-P7:11 Hexyl-3,4-dephostatin-sensitive period in the early phase of insulin-induced adipocyte differentiation of 3T3-L1 cells. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80720-8] [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: 11/27/2022]
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Nakaya N, Tsubono Y, Nishino Y, Hosokawa T, Fukudo S, Shibuya D, Akizuki N, Yoshikawa E, Kobayakawa M, Fujimori M, Saito-Nakaya K, Uchitomi Y, Tsuji I. Personality and cancer survival: the Miyagi cohort study. Br J Cancer 2005; 92:2089-94. [PMID: 15900301 PMCID: PMC2361779 DOI: 10.1038/sj.bjc.6602610] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
We tested the hypothesis that personality plays a role in cancer outcome in a population-based prospective cohort study in Japan. In July 1990, 41 442 residents of Japan completed a short form of the Eysenck Personality Questionnaire-Revised and a questionnaire on various health habits, and between January 1993 and December 1997, 890 incident cases of cancer were identified among them. These 890 cases were followed up until March 2001, and a total of 356 deaths from all causes was identified among them. Cox proportional-hazards regression was used to estimate the hazard ratio (HR) of death according to four score levels on each of four personality subscales (extraversion, neuroticism, psychoticism, and lie), with adjustment for potential confounding factors. Multivariable HRs of deaths from all causes for individuals in the highest score level on each personality subscale compared with those at the lowest level were 1.0 for extraversion (95% CI=0.8–1.4; Trend P=0.73), 1.1 for neuroticism (0.8–1.6; Trend P=0.24), 1.2 for psychoticism (0.9–1.6; Trend P=0.29), and 1.0 for lie (0.7–1.5; Trend P=0.90). The data obtained in this population-based prospective cohort study in Japan do not support the hypothesis that personality is associated with cancer survival.
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Affiliation(s)
- N Nakaya
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
- Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
- Department of Behavioral Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
| | - Y Tsubono
- Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
| | - Y Nishino
- Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
| | - T Hosokawa
- Department of Human Development Disability, Tohoku University Graduate School of Education, 27-1 Kawauchi, Sendai, Japan
| | - S Fukudo
- Department of Behavioral Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
| | - D Shibuya
- Miyagi Cancer Society, Kamisugi 5-7-30, Sendai, Japan
| | - N Akizuki
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
| | - E Yoshikawa
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
| | - M Kobayakawa
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
| | - M Fujimori
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
| | - K Saito-Nakaya
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
- Department of Behavioral Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
| | - Y Uchitomi
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan
- Psycho-Oncology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa, Japan. E-mail:
| | - I Tsuji
- Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Sendai, Japan
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Kobayashi A, Hosokawa T, Tanaka Y. Recurrence of asthma after removal of adrenaline secreting pheochromocytoma. J Anesth 2005; 7:377-9. [PMID: 15278829 DOI: 10.1007/s0054030070377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/1992] [Accepted: 01/28/1993] [Indexed: 12/01/2022]
Affiliation(s)
- A Kobayashi
- Department of Anesthesiology, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Takabayashi Y, Haruyama Y, Rikiishi Y, Hosokawa T, Shibata K, Kubozono Y. Preferred location of the Dy ion in the minor isomer of Dy@C82 determined by Dy LIII-edge EXAFS. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.02.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Sasaoka A, Nishiya K, Hosokawa T, Ito H, Hashimoto K, Enzan H. The number of CD10-positive glomerular epithelial cells reflects renal prognosis in IgA nephropathy patients. Clin Nephrol 2003; 60:305-14. [PMID: 14640235 DOI: 10.5414/cnp60305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The glomerular epithelial cells play an important role in glomerular filtration of the kidney. The disruption of these cells contributes to the development of glomerulosclerosis. The present study was performed to elucidate whether loss of the glomerular epithelial cells is associated with renal injury in patients with IgA nephropathy. PATIENTS AND METHODS Thirty renal biopsy specimens from IgA nephropathy, 12 from minor glomerular abnormalities and 5 from normal controls were observed. The specimens from IgA nephropathy were divided into 2 groups: Group IgA-1, including 11 patients who had received a follow-up renal biopsy because of deterioration of renal function, and Group IgA-2, consisting of the remaining 19 patients without follow-up biopsy. Immunohistochemistry was performed using a monoclonal antibody against CD10 antigen that appears on mature epithelial cells of glomeruli. RESULTS The average number of CD10-positive glomerular epithelial cells (GECs) was significantly lower in IgA nephropathy than in either minor glomerular abnormalities or the normal controls. In IgA nephropathy, there were significant correlations of the GECs with renal functions. The GECs were reduced along with the progression of histopathological damage. In group IgA-1, the GECs were significantly reduced at the second biopsy compared with the first biopsy, and significantly fewer in group IgA-1 than in group IgA-2 at the first biopsy. The GECs showed a significant correlation with renal prognosis during the follow-up period. CONCLUSIONS The reduction of GECs was associated with renal dysfunction, histopathological damage and renal prognosis. The GECs may be a useful predictor of renal prognosis in IgA nephropathy.
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Affiliation(s)
- A Sasaoka
- Second Department of Internal Medicine, Kochi Medical School, Nankou-city, Kochi, Japan.
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Uto H, Chiba T, Umezawa K, Hosokawa T, Kondo K, Shimokado K. 2P-0413 Two insulin-sensitizers differently affect insulin-induced adipogenesis. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90555-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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40
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Hori Y, Sato S, Yamate J, Kurasaki M, Nishihira J, Hosokawa T, Fujita H, Saito T. Immunohistochemical study of macrophage migration inhibitory factor in rat liver fibrosis induced by thioacetamide. Eur J Histochem 2003; 47:317-24. [PMID: 14706927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
Macrophage migration inhibitory factor (MIF) is a molecule known to regulate macrophage accumulation at sites of inflammation. To elucidate the role of MIF in progression of liver fibrosis, the immunohistochemical localization of MIF and macrophages in the liver were examined. Male Wistar rats received thioacetamide (TA) injections (200 mg/kg, i.p.) for 1 or 6 weeks. In biochemical and histological tests, it was confirmed that liver fibrosis was induced. In immunohistochemical analyses, the expression of MIF protein was seen in hepatocytes in the areas extending out from the central veins to the portal tracts. In particular, at 6 weeks, immunoreactivity was detected in degenerated hepatocytes adjacent to the fibrotic areas but hardly observed in the fibrotic areas. On the other hand, a number of exudate macrophages stained by antibody ED1 were seen in the areas from the central veins to the portal tracts at 1 week and in the fibrotic areas at 6 weeks. Macrophages also showed a significant increase in number as compared with controls. These results revealed that there was a close relationship between the appearance of MIF expression and ED1-positive exudate macrophages in degenerated hepatocytes during the progression of TA-induced liver fibrosis.
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Affiliation(s)
- Y Hori
- Department of Food and Nutrition, Hakodate Junior College, Hakodate, Japan
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41
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Abstract
The effect of trichloroethylene (TCE) on long-term potentiation (LTP) was studied using both electrical and optical recording. The hippocampi from mice injected with 300 mg/kg or 1000 mg/kg TCE were sliced 24 h after administration. The field potential from the CAI was recorded. After the application of tetanus, population spikes (PS) were potentiated in all groups, but the post-per-pre ratio of PS was smaller in TCE groups than in the control. Optical recording was also carried out in 1000 mg/kg TCE-injected mice and a new analytical method using a high speed camera was employed. After the induction of tetanus, the optical signal was potentiated in both TCE and control groups. However, the post-per-pre ratio of the optical signals and response area were smaller in the TCE groups than in the control. It was suggested that the impairment of LTP is one of the mechanisms of the impairment of immediate memory after acute exposure to TCE in humans.
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Affiliation(s)
- M Ohta
- Laboratory of Environmental Biology, Hokkaido University School of Medicine, Sapporo, Japan
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42
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Calvo C, Hosokawa T, Reinheimer H, Maitlis PM. Structure of .sigma., .pi.-[2-(pentamethylcylopentadienyl)-p-methylphenethyl](acetylacetonate)palladium from the trimerization of 2-butyne with tolylpalladium chloride. A dihapto-cyclopentadiene. J Am Chem Soc 2002. [DOI: 10.1021/ja00764a059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hosokawa T, Maitlis PM. Lightly stabilized model for acid and base reactions, carbonylation, and .beta.-hydride elimination in organopalladium chemistry. Reactions of bis[dihapto-.sigma.,.pi.-1-(1-phenylethylene)pentamethylcyclopentadiene]dichlorodipalladium(II). J Am Chem Soc 2002. [DOI: 10.1021/ja00796a025] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hosokawa T, Maitlis PM. Model system for acid and base reactions, carbonylation, and .beta.-hydride elimination in organopalladium chemistry. J Am Chem Soc 2002. [DOI: 10.1021/ja00764a060] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Hosokawa T, Calvo C, Lee HB, Maithlis PM. Reactions of acetylenes with noble-metal halides. X. Reaction of phenylpalladium chloride with 2-butyne and the structure and stereochemical nonrigidity of a dihaptocyclopentadiene, [dihapto-.sigma.,.pi.-1-(1-arylethylene)pentamethylcyclopentadiene]acetylacetonatopalladium(II). J Am Chem Soc 2002. [DOI: 10.1021/ja00796a024] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Matsubara Y, Nishiya K, Tahara K, Hosokawa T, Hashimoto K, Moriki T, Ota K, Nishimura S. [A case of rheumatoid arthritis associated with minimal change nephrotic syndrome]. Rinsho Byori 2001; 49:1293-7. [PMID: 11797400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
A 55-year-old Japanese woman has been treated with various kinds of anti-rheumatic drugs under a diagnosis of rheumatoid arthritis(RA) for 18 years of disease duration. She persistently had right elbow joint pain and swelling and X-ray showed bone erosion on humerus. Thus, the synovectomy was performed with typical histopathology of RA on April 1999. On the end of February 2000, she had suddenly fatigue and anasarca with profound proteinuria of nephrotic syndrome. The renal biopsy showed minimal change glomerulopathy and no cellular infiltration in interstitial tissue by light microscopy and partial fusion of foot process by electron microscopy. Renal function was sustained normally. All of anti-rheumatic drugs including D-penicillamine(D-Pc) except NSAID were stopped and she was treated with bed rest, diet therapy, diuretics and albumin infusion without steroid therapy. Edema and proteinuria gradually disappeared. Membranous and amyloid nephropathy in RA patients associated with nephrotic syndrome are found in high incidence in literature. In low incidence, MCNS is associated with NSAID or D-Pc induced nephropathy in RA. In our case, nephrotic syndrome disappeared in 6 weeks without discontinuation of NSAID and application of steroid therapy. Thus, MCNS might be co-incidentally associated with RA.
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Affiliation(s)
- Y Matsubara
- Second Department of Internal Medicine, Kochi Medical School, Nankoku 783-8505
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Abstract
We established a straightforward murine model of oropharyngeal candidiasis. Mice were immunosuppressed with cortisone acetate, anesthetized, and then inoculated by placing cotton wool balls saturated with Candida albicans sublingually for 2 h. A prolonged, reproducible infection was induced. This model may be useful for antifungal screening or pathogenesis studies.
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Affiliation(s)
- Y Kamai
- Biological Research Laboratories, Sankyo Co., Ltd., Shinagawa-ku, Tokyo 140-8710, Japan.
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Abstract
This study was performed to investigate the correlation between clinical parameters and grading of iron deposition in renal biopsy specimens from 102 patients with various kidney diseases. Iron deposition in renal tissues was detected by Berlin blue staining. The extent of iron staining was semiquantitatively graded as negative (Fe(-)), grade 0, or positive (Fe(+)), including faint, grade 1; moderate, grade 2; or severe, grade 3, by light microscopy. Thirty-four of 102 patients (33%) showed positive iron staining. Fe(+) patients had various renal diseases, mainly consisting of 12 patients with immunoglobulin A nephropathy and 5 patients with benign nephrosclerosis. Mean arterial pressure (MAP), serum creatinine (sCr) levels, incidence of hematuria, and urinary N-acetylbeta-D-glucosaminidase (u-NAG) levels in Fe(+) patients were significantly greater than those in Fe(-) patients, and u-NAG levels correlated positively with the extent of iron deposition. Study patients were tentatively divided into two groups according to the extent of iron deposition: group A, patients with grades 2 and 3 staining, and group B, patients with grades 0 and 1 staining. In group A, MAP, sCr level, urinary protein excretion, and the incidence of hematuria were significantly greater than in group B. Our results suggest that the amount of iron deposition in renal tissue may contribute to the progression of chronic renal disease and may be an early and sensitive indicator of renal damage in certain renal diseases.
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Affiliation(s)
- H Wang
- Second Department of Internal Medicine, Kochi Medical School, Nankoku City, Kochi, Japan
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Inoue T, Yokoyoma T, Mori Y, Sasaki Y, Hosokawa T, Yanagisawa H, Koike H. The effect of topical CS-088, an angiotensin AT1 receptor antagonist, on intraocular pressure and aqueous humor dynamics in rabbits. Curr Eye Res 2001; 23:133-8. [PMID: 11840352 DOI: 10.1076/ceyr.23.2.133.5473] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE To evaluate the ocular hypotensive effect of topical CS-088, an angiotensin AT1 receptor antagonist, and the effect of CS-088 on aqueous humor dynamics. METHODS The effects of CS-088 on intraocular pressure (IOP) were studied in 2 models of rabbit ocular hypertension. Experimental ocular hypertension was induced in albino rabbits by injecting alpha-chymotrypsin into the anterior chamber (alpha-chymotrypsin rabbit). The effects of the single application of CS-088 were examined. Additionally, CS-088 was repeatedly administered over a period of 3 weeks to hereditary ocular hypertensive rabbits (buphthalmic rabbits, JWHR bu/bu) and the IOPs were monitored throughout the experiment. The effects of CS-088 on aqueous humor dynamics were also examined in normal rabbits. In this study, the methods of IOP recovery rate, two-level constant pressure perfusion and fluorescein-dextran perfusion were used respectively to determine the aqueous inflow, outflow facility and uveoscleral outflow (USF). RESULTS CS-088 at 1% and 2% significantly lowered the IOP in the alpha-chymotrypsin rabbits with a maximum IOP reduction of 10.1 mmHg. The maximum effect obtained with 2% CS-088 was no greater than that with 1% CS-088. In the buphthalmic rabbits, 2% CS-088 also lowered IOP significantly. Timolol was effective in both models. In the study on aqueous humor dynamics, a slight increase in USF (17%) was seen after a topical application of CS-088 whereas changes in aqueous inflow or outflow facility were not observed. CONCLUSIONS Topical CS-088 can decrease IOP in rabbits. Despite the USF change, the ocular hypotensive mechanism by CS-088 was not fully determined.
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Affiliation(s)
- T Inoue
- Research Laboratories of Neuroscience and Immunology, Sankyo Company Limited, Tokyo, Japan.
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Abstract
2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) is an endocrine disrupter that exerts cytotoxic effects on organisms. In this study, the influence of 2,4,5-T at low concentrations on apoptosis in PC 12 cells was investigated. Although no apoptotic features were observed in PC12 cells treated with 2,4,5-T, it inhibited the DNA fragmentation induced by serum deprivation. In addition, the cell viability of PC12 cells increased after treatment with 2,4,5-T. In conclusion, 2,4,5-T suppressed the apoptosis of the cultured cells. Since apoptosis is a morphological and biochemical description of a physiological mechanism of cell death that is commonly associated with programmed events necessary for development of individuals and organs, the inhibitory effect of 2,4,5-T on apoptosis might cause serious damage to cell homeostasis and differentiation.
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Affiliation(s)
- O Yamanoshita
- Department of Environmental Medicine and Informatics, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan
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