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Tomita F, Fuse H, Fujisaki T, Yasue K, Miyakawa S, Ikoma H, Yoshizawa T, Oyama K, Oyama S, Okumura T, Tamaki Y. [Verification of Dose Distribution in Cervical Cancer Brachytherapy Using Metal and Plastic Applicators]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2023:2023-1375. [PMID: 37316259 DOI: 10.6009/jjrt.2023-1375] [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: 06/16/2023]
Abstract
PURPOSE To validate the point-A dose and dose distribution of metal and resin applicators in comparison with those of TG-43U1. METHODS The metal and resin applicators consisting of tandem and ovoid were modeled by the egs_brachy. The doses to point A and dose distributions considering each applicator were calculated and compared to those of TG-43U1. RESULTS The dose to point A considering the metal applicator was 3.2% lower than that of TG-43U1, but there was no difference in the dose to point A considering the resin applicator. The dose distribution considering the metal applicator was lower than that of TG-43U1 at all calculation points, but there was no difference in the dose distribution considering the resin applicator at almost all calculation points. CONCLUSION In this study, the dose distribution considering the metal applicator was lower than that of TG-43U1 at all calculation points, but there was no difference in the dose distribution considering the resin applicator at almost all calculation points. Therefore, TG-43U1 can accurately calculate the dose distribution when changing from the metal applicator to the resin applicator.
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Affiliation(s)
- Fumihiro Tomita
- Graduate School of Health Sciences, Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
- Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
| | - Hiraku Fuse
- Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
| | - Tatsuya Fujisaki
- Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
| | - Kenji Yasue
- Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
| | - Sin Miyakawa
- Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
| | - Hideaki Ikoma
- Department of Radiation Technology, Ibaraki Prefectural Central Hospital
| | | | | | - Satoshi Oyama
- Department of Radiology, Tsuchiura Kyodo General Hospital
| | - Toshiyuki Okumura
- Department of Radiation Oncology, Ibaraki Prefectural Central Hospital
| | - Yoshio Tamaki
- Department of Radiation Oncology, Fukushima Rosai Hospital
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Tanaka S, Uchida S, Hakamata A, Miyakawa S, Odagiri K, Inui N, Watanabe H, Namiki N. Simultaneous LC-MS analysis of plasma concentrations of sildenafil, tadalafil, bosentan, ambrisentan, and macitentan in patients with pulmonary arterial hypertension. Pharmazie 2021; 75:236-239. [PMID: 32539916 DOI: 10.1691/ph.2020.0021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Phosphodiesterase-5 (PDE-5) inhibitors and endothelin receptor antagonists (ERAs) are standard therapies for pulmonary arterial hypertension (PAH). The inter-individual variability of these pharmacokinetics is reported remarkably large, and therapeutic drug monitoring (TDM) can be useful to improve the likelihood of the desired therapeutic and safety outcomes. This study aimed to develop a LC-MS method to determine the concentrations of five PAH drugs (PDE-5 inhibitors: sildenafil and tadalafil, ERAs: bosentan, macitentan, and ambrisentan) from plasma samples using a simple process followed by a single mass spectrometric run, and to validate this approach through pharmacokinetic analyses in patients. A solid extraction method was used for sample preparation of the drugs from human plasma. The total run time for a single injection was within 10 min. The calibration curves for all drugs were linear, and the lower limits of quantitation were 1 (sildenafil), 2 (tadalafil), 5 (ambrisentan), and 10 ng/mL (bosentan, macitentan). The accuracy and precision values suggested that the assay had high accuracy and reliability. To prove the utility of this method, the plasma concentrations of the five PAH drugs were determined after their oral administration to nine PAH patients.
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Affiliation(s)
- S Tanaka
- Department of Pharmacy Practice & Science, Hamamatsu University School of Medicine, Japan
| | - S Uchida
- Department of Pharmacy Practice & Science, Hamamatsu University School of Medicine, Japan;,
| | - A Hakamata
- School of Pharmaceutical Sciences, University of Shizuoka, Department of Clinical Pharmacology & Therapeutics, Hamamatsu University School of Medicine, Japan
| | - S Miyakawa
- School of Pharmaceutical Sciences, University of Shizuoka, Department of Clinical Pharmacology & Therapeutics, Hamamatsu University School of Medicine, Japan
| | - K Odagiri
- School of Pharmaceutical Sciences, University of Shizuoka, Department of Clinical Pharmacology & Therapeutics, Hamamatsu University School of Medicine, Japan
| | - N Inui
- School of Pharmaceutical Sciences, University of Shizuoka, Department of Clinical Pharmacology & Therapeutics, Hamamatsu University School of Medicine, Japan
| | - H Watanabe
- School of Pharmaceutical Sciences, University of Shizuoka, Department of Clinical Pharmacology & Therapeutics, Hamamatsu University School of Medicine, Japan
| | - N Namiki
- Department of Pharmacy Practice & Science, Hamamatsu University School of Medicine, Japan
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Miura K, Miyakawa S, Narayama S, Hirano H, Kanai K, Miwa T. Athletes as Health Testing Examinees. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634913] [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: 10/17/2022]
Abstract
Abstract:Health-testing examination data of 91 male and 54 female athletes were studied, together with age-matched controls, on serum biochemistry, ECG findings, hematology, and some data on gynecological physiology. Analysis of serum biochemical values revealed statistically significant differences in 14 of 18 routine test items as compared with the age-matched controls. In ECG findings, the combination of bradycardia and left ventricular hypertrophy was most frequently found in male athletes, whereas that of bradycardia and sinus arrythmia was observed predominantly in female athletes. The incidence of anemia and menstrual dysfunction was higher in female athletes than in controls, especially in the basketball team. In the same team, a high rate of deviant ECG records and a different distribution of the age at menarche were also observed.
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Goto R, Miyakawa S, Inomata E, Takami T, Yamaura J, Nakamura Y. De novo sequencing of highly modified therapeutic oligonucleotides by hydrophobic tag sequencing coupled with LC-MS. J Mass Spectrom 2017; 52:78-93. [PMID: 27935159 DOI: 10.1002/jms.3902] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 11/23/2016] [Accepted: 11/24/2016] [Indexed: 06/06/2023]
Abstract
Correct sequences are prerequisite for quality control of therapeutic oligonucleotides. However, there is no definitive method available for determining sequences of highly modified therapeutic RNAs, and thereby, most of the oligonucleotides have been used clinically without direct sequence determination. In this study, we developed a novel sequencing method called 'hydrophobic tag sequencing'. Highly modified oligonucleotides are sequenced by partially digesting oligonucleotides conjugated with a 5'-hydrophobic tag, followed by liquid chromatography-mass spectrometry analysis. 5'-Hydrophobic tag-printed fragments (5'-tag degradates) can be separated in order of their molecular masses from tag-free oligonucleotides by reversed-phase liquid chromatography. As models for the sequencing, the anti-VEGF aptamer (Macugen) and the highly modified 38-mer RNA sequences were analyzed under blind conditions. Most nucleotides were identified from the molecular weight of hydrophobic 5'-tag degradates calculated from monoisotopic mass in simple full mass data. When monoisotopic mass could not be assigned, the nucleotide was estimated using the molecular weight of the most abundant mass. The sequences of Macugen and 38-mer RNA perfectly matched the theoretical sequences. The hydrophobic tag sequencing worked well to obtain simple full mass data, resulting in accurate and clear sequencing. The present study provides for the first time a de novo sequencing technology for highly modified RNAs and contributes to quality control of therapeutic oligonucleotides. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- R Goto
- Bioanalysis Business Department, CMIC Pharma Science Co., Ltd., 17-18, Nakahata-cho, Nishiwaki-shi, Hyogo, 677-0032, Japan
| | - S Miyakawa
- Exploratory Research Laboratory, RIBOMIC Inc., 3-16-13, Shirokanedai, Minato-ku, Tokyo, 108-0071, Japan
| | - E Inomata
- Exploratory Research Laboratory, RIBOMIC Inc., 3-16-13, Shirokanedai, Minato-ku, Tokyo, 108-0071, Japan
| | - T Takami
- Bioanalysis Department, CMIC, Inc., Hoffman Estates, Illinois, 60192-3702, USA
| | - J Yamaura
- Exploratory Research Laboratory, RIBOMIC Inc., 3-16-13, Shirokanedai, Minato-ku, Tokyo, 108-0071, Japan
| | - Y Nakamura
- Exploratory Research Laboratory, RIBOMIC Inc., 3-16-13, Shirokanedai, Minato-ku, Tokyo, 108-0071, Japan
- Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
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Kurosawa T, Tachibana H, Moriya S, Miyakawa S, Sato M. SU-F-T-479: Estimation of the Accuracy in Respiratory-Gated Radiotherapy. Med Phys 2016. [DOI: 10.1118/1.4956664] [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: 11/07/2022] Open
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Moriya S, Tachibana H, Hotta K, Nakamura N, Baba H, Kohno R, Miyakawa S, Kurosawa T, Akimoto T. SU-F-J-57: Effectiveness of Daily CT-Based Three-Dimensional Image Guided and Adaptive Proton Therapy. Med Phys 2016. [DOI: 10.1118/1.4955965] [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: 11/07/2022] Open
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Miyakawa S, Tachibana H, Moriya S, Kurosawa T, Sato M. SU-C-202-06: Design and Development of a Non-Rigid Phantom Ventilating Air Quantitatively Evaluating CT-Based Pulmonary Ventilation Imaging. Med Phys 2016. [DOI: 10.1118/1.4955574] [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: 11/07/2022] Open
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8
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Hakamata A, Odagiri K, Miyakawa S, Irisawa H, Takeuchi K, Inui N, Tanaka S, Uchida S, Watanabe H. Pharmacokinetic and Pharmacodynamic Comparison of Sildenafil-Bosentan and Sildenafil-Ambrisentan Combination Therapies for Pulmonary Hypertension. Clin Transl Sci 2016; 9:29-35. [PMID: 26756977 PMCID: PMC5351320 DOI: 10.1111/cts.12382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 11/20/2015] [Indexed: 11/30/2022] Open
Abstract
To elucidate whether the pharmacokinetics (PK) and pharmacodynamics (PD) of sildenafil are influenced differently when it is coadministered with bosentan (S+B) or with ambrisentan (S+A), we evaluated the PK and PD profiles of sildenafil before and after 4–5 weeks of S+A or S+B treatment in patients with pulmonary arterial hypertension. The area under the plasma concentration–time curve of sildenafil was significantly higher in S+A treatment than in S+B treatment (165.8 ng•h/mL vs. 396.8 ng•h/mL, P = 0.018) and the oral clearance of sildenafil was significantly lower after S+A treatment than after S+B treatment (120.6 L/h/kg vs. 50.4 L/h/kg, P = 0.018). In the PD study, incremental shuttle walking distance was superior during treatment with S+A than during treatment with S+B (S+B; 280 m vs. S+A; 340 m, P = 0.042). There were no concerns about safety with either combination therapy regime.
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Affiliation(s)
- A Hakamata
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - K Odagiri
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - S Miyakawa
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - H Irisawa
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - K Takeuchi
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - N Inui
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - S Tanaka
- Department of Pharmacy Practice and Science, School of Pharmaceutical Science, University of Shizuoka, Shizuoka, Japan
| | - S Uchida
- Department of Pharmacy Practice and Science, School of Pharmaceutical Science, University of Shizuoka, Shizuoka, Japan
| | - H Watanabe
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Watanabe M, Hayashi T, Miyazaki Y, Miyakawa S. Cross-sectional area and muscle activity of the lumbar multifidus muscles in varying postures during abdominal draw-in exercises. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1622] [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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Yanagi T, Hattori Y, Takenaka R, Iwabuchi M, Miyakawa S, Sugie C, Baba F, Ogino H, Mori Y, Shibamoto Y. Usefulness of Induction Chemotherapy Followed by Chemoradiation in the Treatment of Oropharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1144] [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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Tanaka S, Uchida S, Miyakawa S, Inui N, Takeuchi K, Watanabe H, Namiki N. PP176—Comparison of Inhibitory Duration of Grapefruit Juice on Organic Anion-Transporting Polypeptide and CYP3A4. Clin Ther 2013. [DOI: 10.1016/j.clinthera.2013.07.212] [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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Abstract
BACKGROUND Robotic surgery is the most advanced development in minimally invasive surgery. However, the number of reports on robot-assisted endoscopic gastrointestinal surgery is still very small. In this article, we describe total laparoscopic pancreaticoduodenectomy (PD) undertaken using the da Vinci Surgical System® (Intutive Surgical). METHODS Three patients underwent robotic PD between November 2009 and February 2010. Following resection of the pancreatic head, duodenum, and the distal stomach, intracorporeal anastomosis was accomplished by Child's method of reconstruction, which includes a two-layered end-to-side pancreaticojejunostomy, an end-to-side choledochojejunostomy, and a side-to-side gastrojejunostomy. RESULTS The time required for surgery was 703 ± 141 min, and blood loss was 118 ± 72 mL. The average hospital stay period was 26 ± 12 days. As a postoperative complication, pancreatic juice leak occurred in one case, but it was managed with conservative treatment. Of the three patients, one had cancer of the papilla of Vater, one had cancer of the pancreatic head, and one had a solid pseudopapillary neoplasm. In all cases, the surgical margin was negative for tumor. CONCLUSIONS Robot-assisted PD required a long time, but organ removal with less bleeding was able to be safely performed owing to the high degree of freedom associated with the forceps manipulation and the magnified view. Similarly, pancreatojejunostomy could certainly be conducted. No major postoperative complications were found. Accumulation of da Vinci PD experience in the future will lead to safer and faster PD.
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Affiliation(s)
- A Horiguchi
- Department of Gastroenterological Surgery, Fujita Health University, Toyoake, Aichi, Japan.
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Imai T, Shindo Y, Utugi K, Iida K, Watanabe K, Mukai N, Kono I, Miyakawa S, Maeda A, Kitagawa Y, Kiso Y. Effects Of Rehydration On The Markers For Muscle Damage Enhanced By Endurance Exercise. Med Sci Sports Exerc 2010. [DOI: 10.1249/01.mss.0000384689.88942.c6] [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: 11/21/2022]
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Horiguchi A, Ishihara S, Ito M, Asano Y, Yamamoto T, Miyakawa S. Three-dimensional models of arteries constructed using multidetector-row CT images to perform pancreatoduodenectomy safely following dissection of the inferior pancreaticoduodenal artery. J Hepatobiliary Pancreat Sci 2010; 17:523-6. [PMID: 20714842 DOI: 10.1007/s00534-009-0261-9] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/04/2009] [Accepted: 12/28/2009] [Indexed: 11/25/2022]
Abstract
BACKGROUND/PURPOSE During a pancreatoduodenectomy (PD) it is important that the anatomy of the arcade of blood vessels in the head of the pancreas is fully understood before the surgery in order to reduce intraoperative bleeding. In most of the patients our group has treated, the inferior pancreaticoduodenal artery (IPDA), one of the efferent arteries of the head of the pancreas, has formed a short common trunk with the first jejunal artery (FJA). Thus, by first locating the origin of the FJA, it was easier to locate the IPDA. There are two ways to locate the IPDA: (1) by measuring the distance between the origin of the superior mesenteric artery (SMA) and that of the FJA; (2) by measuring the distance between the origin of the middle colic artery (MCA) and that of the FJA. Here, we report our measurements of both distances using three-dimensional (3D) models of arteries constructed with multidetector-row computed tomography (MD-CT) images and discuss which is the better measurement to determine the location of the IPDA during PD. METHODS A total of 140 patients underwent 64-MD-CT imaging to acquire early and late arterial phase scans. The distance between the origin of the SMA and that of the FJA and the distance between the origin of the MCA and that of the FJA origin were measured. RESULTS In patients whose IPDA formed either a common trunk with the FJA or arose directly from the SMA, the IPDA or the common truck was located in parallel with the SMA at a very short distance of approximately 18 mm from the MCA origin towards the center. The distance between the SMA origin and the IPDA was significantly longer (approximately 36 mm). Therefore, locating the MCA origin during PD helped determine the location of the IPDA. However, in patients whose anterior inferior pancreaticoduodenal artery (AIPDA) and posterior inferior pancreaticoduodenal artery (PIPDA) arose separately, the distance between the AIPDA origin and the MCA origin was approximately 18 mm, the distance between the AIPDA origin and the PIPDA origin was approximately 19 mm, and the distance between the PIPDA origin and the SMA origin was 19 mm. Thus, locating the SMA helped determine the location of the IPDA during PD in these patients. CONCLUSION Based on our findings that the distance between the IPDA origin and the MCA origin was short, we have shown that it is effective to locate the MCA origin in order to determine the location of the IPDA.
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Affiliation(s)
- Akihiko Horiguchi
- Department of Bilio-Pancreatic Surgery, Fujita Health University, Toyoake, Aichi, Japan.
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Hyodo K, Xu C, Mishima H, Miyakawa S. Optical Stress Imaging for Orthopedic Biomechanics – Comparison of Thermoelastic Stress Analysis and Developed Mechanoluminescent Method. IFMBE Proceedings 2010. [DOI: 10.1007/978-3-642-14515-5_139] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Wakabayashi A, Tanese K, Yamamoto K, Tanomogi H, Miyakawa S. Extraocular sebaceous carcinoma expressing oestrogen receptor alpha and human epidermal growth factor receptor 2. Clin Exp Dermatol 2009; 35:546-8. [PMID: 19874363 DOI: 10.1111/j.1365-2230.2009.03654.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tanese K, Wakabayashi A, Suzuki T, Miyakawa S. Immunoexpression of human epidermal growth factor receptor-2 in apocrine carcinoma arising in naevus sebaceous, case report. J Eur Acad Dermatol Venereol 2009; 24:360-2. [PMID: 19703100 DOI: 10.1111/j.1468-3083.2009.03407.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
MESH Headings
- Aged
- Apocrine Glands
- Biomarkers, Tumor/biosynthesis
- Biomarkers, Tumor/immunology
- Biopsy
- Carcinoma/immunology
- Carcinoma/metabolism
- Carcinoma/pathology
- Humans
- Immunohistochemistry
- Male
- Neoplasms, Multiple Primary/immunology
- Neoplasms, Multiple Primary/metabolism
- Neoplasms, Multiple Primary/pathology
- Nevus, Sebaceous of Jadassohn/immunology
- Nevus, Sebaceous of Jadassohn/metabolism
- Nevus, Sebaceous of Jadassohn/pathology
- Receptor, ErbB-2/biosynthesis
- Receptor, ErbB-2/immunology
- Skin Neoplasms/immunology
- Skin Neoplasms/metabolism
- Skin Neoplasms/pathology
- Sweat Gland Neoplasms/immunology
- Sweat Gland Neoplasms/metabolism
- Sweat Gland Neoplasms/pathology
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Iizuka T, Miyakawa S, Sato M, Suzuki K, Hamada J, Sakai F. Diversity of acute brain damage in mitochondrial disorders. J Neurol Sci 2009. [DOI: 10.1016/j.jns.2009.02.088] [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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Sugiyama S, Matsumura H, Kitatani T, Kobayashi A, Miyakawa S, Nomura Y, Sakamoto T, Nakamura Y, Okada S, Yamakami M, Maki S, Yoshikawa H, Adachi H, Takano K, Murakami S, Inoue T. Crystallization and preliminary X-ray analysis of RNA aptamer in complex with human immunoglobulin G. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092180] [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: 11/10/2022] Open
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Matsumura H, Sugiyama S, Tomoya K, Nomura Y, Sakamoto T, Miyakawa S, Nakamura Y, Maki S, Yoshikawa H, Adachi H, Takano K, Murakami S, Inoue T, Mori Y. Crystal structure of RNA aptamer in complex with human immunoglobulin G. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308090132] [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: 11/10/2022] Open
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Liu X, Matsumoto S, Noguchi H, Yonekawa Y, Iwanaga Y, Okitsu T, Nagata H, Miyakawa S, Song C, Jackson A, Naziruddin B, Levy M. Continuous, but Not Occasional, Oral Ethanol Intake Reduces the Success of Intraportal Transplanted Islets of Langerhans: An Experimental Study. Transplant Proc 2008; 40:441-3. [DOI: 10.1016/j.transproceed.2007.12.021] [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: 11/16/2022]
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Shiroki R, Mori S, Miyakawa S, Ichino M, Hirano M, Kusaka M, Hayakawa K, Ishikawa K, Hoshinaga K. MP-16.20: Thalidomide in combination with interleukin-2 for patients with metastatic renal cell carcinoma refractory to prior IL-2 and alpha-interferon treatment. Urology 2007. [DOI: 10.1016/j.urology.2007.06.480] [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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Shiroki R, Mori S, Miyakawa S, Kusaka M, Hayakawa K, Ishikawa K, Hoshinaga K. MP-18.20: Comparison of prospective and longitudinal assessment of health- and disease-related QOL between radical perineal and retropubic prostatectomy in men with localized prostate carcinoma. Urology 2007. [DOI: 10.1016/j.urology.2007.06.526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Tension is necessary to maintain and restore the mechanical properties of soft connective tissues. Conversely, reduced tension states such as produced by immobilization weaken mechanical properties and facilitate joint contracture. We assessed the effect of low torque-long duration stretching to increase the range of motion (ROM) and to restore the mechanical properties of contracted joints in 66 rat knees immobilized for 40 days. After remobilization, we randomly divided the contracted knees into four treatment groups treated with repeated stretches of diverse torques and duration: stretching with low-torque and long-duration, high-torque and short-duration, high-torque and long-duration, low-torque and short duration. We included control and natural recovery groups. Phase lag in all treatment groups recovered to the same range as in the normal controls. Dynamic stiffness, which was not altered by joint immobilization, increased in all treatment groups. Deformation and load to failure improved substantially only in the low-torque and long-duration stretching group. Low-torque and long-duration repeated stretching leads to a greater restoration of ROM with more normal mechanical properties compared to high-torque and short duration stretching.
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Affiliation(s)
- M Usuba
- Course of Physical Therapy, Department of Health, Tsukuba University of Technology, 4-12-7 Kasuga, Tsukuba, lbaraki 305-0298, Japan.
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Washio T, Mizuhara K, Mishima H, Miyakawa S, Hyodo K. Evaluation of femoral stress distribution change caused by hip stem implantation conditions. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)85111-0] [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: 10/24/2022]
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Miyazaki T, Matsuzaki Y, Ikegami T, Miyakawa S, Doy M, Tanaka N, Bouscarel B. Optimal and effective oral dose of taurine to prolong exercise performance in rat. Amino Acids 2004; 27:291-8. [PMID: 15503230 DOI: 10.1007/s00726-004-0133-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Accepted: 08/20/2004] [Indexed: 11/24/2022]
Abstract
The aim of this study was to determine the effective and optimum dose of taurine for exercise performance and to maintain tissue taurine concentration. Rats received a respective daily dose of 0, 20, 100, and 500 mg/kg body weight of taurine (EC and ET-1, -2, -3 groups, respectively) for two weeks, and then, were subjected to treadmill until exhaustion. The running time to exhaustion was significantly prolonged by 25% and 50% in the ET-2 and -3 groups, respectively, compared to that in the EC group accompanied with maintenance of taurine tissue concentrations. Furthermore, the oxidative glutathione per total glutathione ratio in tissues was inhibited in the ET-2 and -3 groups whereas it was higher in the EC group than in both the no exercise and taurine-administered groups. Therefore the effective and optimal doses of oral taurine administration for two weeks on a transient exercise performance were between 100 and 500 mg/kg/day.
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Affiliation(s)
- T Miyazaki
- Ibaraki Prefectural Institute of Public Health, Mito, Japan
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Hanai T, Uyama I, Maruta M, Maeda K, Ito M, Satoh T, Horiguchi A, Miyakawa S. A new technique of laparoscopic surgery for rectal disease. Rev Gastroenterol Peru 2004; 24:29-33. [PMID: 15098039] [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: 04/29/2023]
Abstract
Laparoscopic rectal surgery is a technique that has to be done in a narrow space: the pelvis. If an immoderate operation is performed with a difficult view, for example in female where the field is disturbed by uterus, it is possible to produce organ trauma or an unexpected bleeding. Taking these problems in mind, we performed laparoscopic surgery in 44 cases of rectal disease with several techniques which we have invented. In these cases either the uterus or the rectum was retracted in the narrow space, and if an anterior resection was to be done, the tape was tied tightly around the rectum below the tumor to avoid touching the tumor and leaving adequate vascular irrigation to the remnant rectum. With the use of our techniques, we did not have female intestinal injury or unexpected bleeding. In addition laparoscopic anterior resection of rectum did not cause any intestinal injury, or unexpected bleeding or anastomotic leakage; also we did not have any local tumor recurrence. It is our belief that these techniques can decrease complications that traumatize the grasping intestine with intestinal forceps and prevent implantation in the anastomosis. This technical report validate that our technique modifications for rectal laparoscopic surgery are useful when a surgeon has to work in a narrow space.
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Affiliation(s)
- T Hanai
- Department of Surgery, Fujita Health University, School of Medicine, Aichi, Japan
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Kaji Y, Tsuji H, Fujita M, Xu Y, Yoshida K, Mashiko S, Shimura K, Miyakawa S, Asino S. Development of a knowledge based system linked to a materials database. Data Sci J 2004. [DOI: 10.2481/dsj.3.88] [Citation(s) in RCA: 2] [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: 11/20/2022] Open
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Kawamura H, Ito A, Muramatsu T, Miyakawa S, Ochiai N, Tateishi T. Long-term implantation of zinc-releasing calcium phosphate ceramics in rabbit femora. J Biomed Mater Res A 2003; 65:468-74. [PMID: 12761837 DOI: 10.1002/jbm.a.10524] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Zinc is an essential trace element that has stimulatory effects on bone formation. Recently, we developed zinc-releasing calcium phosphate ceramics in order to add the pharmacologic effect of zinc to calcium phosphate ceramics. In our previous study, we showed that the optimum zinc content for promoting bone formation was 0.316 wt %. Therefore a zinc composite ceramic of zinc-containing beta-tricalcium phosphate and hydroxyapatite, with a zinc content of 0.316 wt %, was chosen for long-term implantation. Cylindrical rods of the zinc composite ceramic were implanted in rabbit femora for 2 to 60 weeks. Using computer-aided image analysis, a histomorphometric study was carried out to investigate bone formation and resorption around the implants. The control was a composite ceramic of beta-tricalcium phosphate and hydroxyapatite without zinc. The addition of zinc to the implant demonstrated both favorable and unfavorable effects on bone remodeling. The favorable effect was enhanced bone apposition to the implant surface, demonstrated by a significant increase in intramedullary bone apposition rate at 6 weeks and in cortical bone apposition rate at 24 and 60 weeks (p < 0.05). The unfavorable effect was increased bone resorption, demonstrated by a significant increase in medullary cavity area at 60 weeks (p < 0.05). In order to utilize the favorable effect and avoid the unfavorable effect of zinc, either a reduction in zinc content in the zinc composite ceramic or the selection of implantation sites that do not have excessive exposure to bone marrow are required.
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Affiliation(s)
- H Kawamura
- Department of Orthopaedic Surgery, Institute of Clinical Medicine, The University of Tsukuba, 2-1-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan
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Abstract
BACKGROUND Cutaneous manifestations are the most frequent, and often the initial feature of extra-articular involvement in patients with rheumatoid vasculitis. OBJECTIVES The purpose of the study was to evaluate the clinical and histological spectrum of cutaneous vasculitis and the associated systemic involvement in patients with rheumatoid vasculitis. METHODS Among 525 patients with rheumatoid arthritis, 20 tissue specimens with histologically proven cutaneous necrotizing vasculitis from 11 patients were investigated by studying the types and levels of affected vessels and related clinical features. RESULTS Small-vessel vasculitis identified as dermal necrotizing venulitis was found in 10 patients, clinically characterized by palpable purpura, maculopapular erythema, erythema elevatum diutinum and haemorrhagic blisters. Arteritis histologically resembling cutaneous polyarteritis nodosa, clinically characterized by subcutaneous nodules, livedo reticularis, atrophie blanche and deep ulcers was identified in four patients all with systemic complications. Coexistence of venulitis and arteritis was identified in three patients. Different cutaneous vasculitic manifestations often coexisted and recurred in the same patient. Three patients with systemic complications of mononeuritis multiplex (two of three), interstitial pulmonary fibrosis (two of three) and abdominal microaneurysms (one of three) died within 1 year of onset of the cutaneous vasculitis. Immunofluorescence demonstrated vessel wall deposition of IgM and/or complement in six of the seven patients examined. CONCLUSIONS Features of cutaneous rheumatoid vasculitis overlapping both the characteristics of cutaneous necrotizing venulitis and cutaneous polyarteritis nodosa together with coexistence of these different type of vasculitis in the same or different lesional skin account for the associated diverse cutaneous vasculitic manifestations. Although dermal venulitis (leucocytoclastic vasculitis) was the most common presentation, the presence of leucocytoclastic vasculitis in rheumatoid patients did not necessarily indicate a favourable prognosis. Associations with mononeuritis multiplex and bowel involvement had a fatal prognosis, while patients with superficial dermal venulitis without other extra-articular involvement may follow a favourable prognosis.
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Affiliation(s)
- K-R Chen
- Department of Dermatology, Kawasaki City Hospital, Kawasaki, Japan.
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Fujimoto N, Wada N, Akiyama M, Tajima S, Ishibashi A, Miyakawa S. Coexistence of beta2 microglobulin and lambda light chain in amyloid fibrils of dialysis-unrelated plasma cell dyscrasia-associated systemic amyloidosis. Br J Dermatol 2002; 147:549-53. [PMID: 12207599 DOI: 10.1046/j.1365-2133.2002.04940.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 11/20/2022]
Abstract
BACKGROUND Systemic amyloidosis occurs as a result of amyloid deposition in various tissues. The amyloid fibrils in systemic amyloidosis have been reported to originate from immunoglobulin light chains. OBJECTIVE We studied the composition of amyloid fibrils from two patients with plasma cell-associated systemic amyloidosis (PASA). METHODS A double immunofluorescence study of the lesional skin of PASA was undertaken. Amyloid proteins were extracted with distilled water from one case of PASA. RESULTS The double immunofluorescence study showed that anti-lambda light chain and anti-beta2 microglobulin antibodies mostly reacted with the same area of amyloid deposit. Amyloid deposits from two patients with PASA who had never undergone haemodialysis showed a positive reaction with the antibodies for beta2 microglobulin as well as immunoglobulin lambda light chain. By the use of immunoblot assay of amyloid fibril proteins, polypeptides immunoreactive with antigamma light chain antibody (29 kDa) and with anti-beta2 microglobulin antibody (12 kDa) were detected. CONCLUSIONS These results indicate that beta2 microglobulin is a component of amyloid fibrils in PASA.
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Affiliation(s)
- N Fujimoto
- Department of Dermatology, National Defense Medical College, Saitama, Japan.
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Abstract
Loosening of a prosthesis is a major problem in total joint arthroplasty. To assess levels of cytokines in patients with such loosening, we measured the pseudosynovial fluid concentration of the following cytokines; tumor necrosis factor (TNF)-alpha, interferon (IFN)-gamma, interleukin (IL)-1beta, IL-4, IL-6, IL-10, IL-12, matrix metalloproteinase (MMP)-1, and MMP-3. We examined the pseudosynovial fluid in patients with a loose hip prosthesis (group A; n = 8) and the synovial fluid in patients with osteoarthritis (OA) of the hip (group B; n = 18) using enzyme-linked immunosorbent assays. The mean concentration of IL-12 was significantly higher in group A than in group B (P < 0.01). Also, we found a significant (P < 0.05) correlation between the concentration of IL-12 and the concentration of MMP-1 in the patients with prosthesis loosening. The concentrations of TNF-alpha, IL-1beta, IL-4, IL-6, IL-10, IFN-gamma, MMP-1, and MMP-3 appeared to be similar in the two groups, although the small number of samples available precluded us from determining that there was no significant difference. The present study is the first to report elevated IL-12 levels in the pseudosynovial fluid of patients with a loose prosthesis. The immunoregulatory effect of IL-12 against wear particles could play an important role in causing loosening of the prosthesis.
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Affiliation(s)
- M Inomoto
- Department of Orthopaedic Surgery, Institute of Clinical Medicine, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
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Abstract
The origin of guanine has been unknown, though there are some reports concerning its abiotic synthesis. We show here that guanine, as well as uracil and cytosine, are synthesized from a 90%N2-10%CO-H2O gas mixture via a complex organic product produced with the high-temperature and rapid quenching technique. This result implies that a large amount of complex organic matter including precursors of bioorganic compounds might have been produced on the primitive earth after cometary impacts.
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Affiliation(s)
- S Miyakawa
- Department of Chemistry and Biotechnology, Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan.
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Tanaka M, Shimizu S, Miyakawa S. Hypertrophic eccrine glands in eccrine angiomatous hamartoma produce gross cystic disease fluid protein 15. Dermatology 2000; 200:336-7. [PMID: 10894969 DOI: 10.1159/000018401] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Kawamura H, Ito A, Miyakawa S, Layrolle P, Ojima K, Ichinose N, Tateishi T. Stimulatory effect of zinc-releasing calcium phosphate implant on bone formation in rabbit femora. J Biomed Mater Res 2000; 50:184-90. [PMID: 10679683 DOI: 10.1002/(sici)1097-4636(200005)50:2<184::aid-jbm13>3.0.co;2-3] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Although hydroxyapatite (HAP) and tricalcium phosphate (TCP) are currently used as bone graft substitutes or coatings on metallic prostheses because of their excellent biocompatibility and osteoconductivity, they do not stimulate bone formation or inhibit bone resorption. Zinc, an essential trace element in many animals, has a direct specific proliferative effect on osteoblastic cells and has a potent and selective inhibitory effect on osteoclastic bone resorption in vitro. Therefore, zinc-containing beta-tricalcium phosphate (ZnTCP) ceramics and composite ceramics of ZnTCP and HAP (ZnTCP/HAP) were implanted in the femora of New Zealand White rabbits for 4 weeks to promote bone formation. The implants were sintered ceramics with zinc contents of 0 (control), 0.063, 0.316 and 0.633 wt %. Histological and histomorphometrical investigation of the undecalcified sections revealed an increase by 51% (p =.0509) in the area of newly formed bone around the ZnTCP/HAP implants of 0. 316 Zn wt % compared with the control. Plasma zinc concentration was unchanged. An increased bone resorption on the endosteal surface was observed when ZnTCP and ZnTCP/HAP of 0.633 Zn wt % were implanted. To promote bone formation, the optimum zinc content of the calcium phosphate ceramics was therefore 0.316 wt %.
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Affiliation(s)
- H Kawamura
- Department of Orthopedic Surgery, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba-shi, Ibaraki 305-8571, Japan
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Miyakawa S, Niwamoto N, Horiguchi A, Hanai T, Mizuno K, Ishihara S, Miura K. Fat absorption after pylorus-preserving pancreatoduodenectomy reconstructed with Billroth II pancreaticojejunostomy or Billroth I pancreaticogastrostomy. Hepatogastroenterology 2000; 47:264-8. [PMID: 10690619] [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: 02/15/2023]
Abstract
BACKGROUND/AIMS The aim of this study was to determine whether Billroth I pancreaticogastrostomy (PG-I) or Billroth II pancreaticojejunostomy (PJ-II) after pylorus-preserving pancreatoduodenectomy is associated with better postoperative fat absorption, based on residual pancreatic exocrine function. Several reconstructive operations have been employed after pylorus-preserving pancreatoduodenectomy to maximize postoperative nutrition. However, no single-institution study has been published comparing the reconstructive procedures with respect to digestion and absorption of fat. METHODOLOGY Fat absorption was studied using the 13C-trioctanoin breath test in patients who were grouped according to the degree of fibrosis of the pancreatic remnant, which was determined by histologic examination of the resection specimen. The fibrosis was graded: grade 0, < 10% fibrosis; grade 1, 10-30% fibrosis; and grade 2, > 30% fibrosis. There were 22 patients in the PG-I group and 22 patients in the PJ-II group. RESULTS There were no significant differences between the PG-I and PJ-II groups in the cumulative excretion of labeled carbon dioxide in the patients with grade 0 pancreatic fibrosis. The cumulative excretion in the PG-I group was better than in the PJ-II group in the patients with grade 1 and grade 2 pancreatic fibrosis. CONCLUSIONS Fat absorption after PG-I is superior to that after PJ-II in patients with disordered exocrine function of the pancreatic remnant. Billroth I pancreaticogastrostomy allows more effective utilization of the exocrine enzymes of the pancreatic remnant due to elimination of the blind loop characteristic of the Billroth II pancreaticojejunostomy.
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Affiliation(s)
- S Miyakawa
- Second Department of Gastroenterological Surgery, Fujita Health University, Toyoake, Japan.
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Kitagawa M, Mitsui H, Nakamura H, Yoshino S, Miyakawa S, Ochiai N, Onobori M, Suzuki H, Sumida T. Differential regulation of rheumatoid synovial cell interleukin-12 production by tumor necrosis factor alpha and CD40 signals. Arthritis Rheum 1999; 42:1917-26. [PMID: 10513808 DOI: 10.1002/1529-0131(199909)42:9<1917::aid-anr18>3.0.co;2-2] [Citation(s) in RCA: 21] [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] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To investigate the roles of tumor necrosis factor alpha(TNFalpha) and the CD40-CD154 interaction in interleukin-12 (IL-12) production by rheumatoid synovial cells (SC). METHODS Levels of IL-12 (p40 and p70) in synovial tissue and culture supernatants of SC from patients with rheumatoid arthritis (RA), osteoarthritis (OA), and ankylosing spondylitis (AS) were assayed by enzyme-linked immunosorbent assay. Effects of anti-CD154 and anti-TNFalpha antibody on spontaneous and lipopolysaccharide (LPS)-stimulated IL-12 production by SC were examined. Effects of immobilized anti-CD3 treatment and depletion of CD4+ T cells on IL-12 production were also tested. CD154 expression by synovial T cells and intracellular IL-12 production during culture were analyzed by flow cytometry. RESULTS IL-12 p40 and p70 levels in RA synovial tissue and spontaneous IL-12 p40 production by SC from RA patients were significantly higher than the levels in OA and AS patients. Spontaneous IL-12 production by SC from RA patients significantly decreased after depletion of CD4+ T cells from SC or after application of anti-CD154 antibody, but not by treatment with anti-TNFalpha antibody. Anti-CD3 antibody stimulation increased spontaneous IL-12 p40 production and CD154 expression by synovial T cells. The increment of IL-12 p40 production by anti-CD3 was abrogated by anti-CD154 antibody. IL-12 p40 production was also increased by LPS stimulation. LPS-stimulated IL-12 production was inhibited by anti-TNFalpha antibody, but not by T cell depletion and anti-CD154 antibody treatment. The TNFalpha inhibitor rolipram inhibited LPS-stimulated IL-12 p40 production by RA SC more strongly than spontaneous production. TNFalpha restored LPS-stimulated IL-12 production that had been inhibited by rolipram. CONCLUSION IL-12 production in RA is regulated by 2 different pathways. One pathway is T cell dependent, predominantly through a CD40-CD154 interaction, while the other is T cell independent, mediated through TNFalpha. Inhibition of IL-12 production by interference with CD40-CD154 interaction and TNFalpha production may be a potential therapeutic strategy for treating RA.
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Affiliation(s)
- M Kitagawa
- Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan
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Horiguchi A, Miyakawa S, Mizuno K, Ishihara S, Miura K. Portal vein resection without reconstruction during Appleby operation in a patient with pancreatic body carcinoma with cavernous transformation. Hepatogastroenterology 1999; 46:2628-30. [PMID: 10522054] [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: 02/14/2023]
Abstract
The prognosis of pancreatic body carcinoma has been poor due to cancerous invasion of major vessels. Resection of the involved vessels may improve resectability and prognosis. We report a patient who had a pancreatic body carcinoma with cavernous transformation of the portal vein, in whom the portal vein was resected without reconstruction during an Appleby operation. A 67 year-old man was admitted for evaluation of back pain. Enhanced computed tomography showed no main trunk of the portal vein but a developed collateral circulation. Celiac angiography revealed encasement of the common hepatic, splenic and celiac artery. Venous angiography revealed obstruction of the portal and splenic veins with cavernous transformation surrounding these veins. Pre-operative diagnosis was carcinoma in the pancreatic body, which invaded the portal vein, the celiac and common hepatic arteries. The Appleby operation combined with resection of the portal vein without reconstruction could be performed, by preserving collateral vessels and monitoring hepatic venous oxygen saturation (ShvO2) to prevent hepatic ischemia caused by occlusion of the portal vein. The post-operative course was uneventful.
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Affiliation(s)
- A Horiguchi
- Second Department of Gastroenterological Surgery, Fujita Health University, Toyoake, Japan
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Takada T, Ammori BJ, Yoshida M, Amano H, Yasuda H, Takeshita K, Koutake H, Takada K, Miyakawa S. Combined preoperative embolization of the right portal vein and hepatic artery for hepatic resection in a high-risk patient. AJR Am J Roentgenol 1999; 173:165-7. [PMID: 10397120 DOI: 10.2214/ajr.173.1.10397120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- T Takada
- First Department of Surgery, Teikyo University School of Medicine, Tokyo, Japan
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Abstract
Reaction among hydrogen cyanide (HCN), formaldehyde (H2CO) and ammonia (NH3) are generally considered an important reaction in amino acid synthesis by electric discharge. Precursors of glycine and aspartic acid were, however, synthesized by adding water to metastable complex compounds produced by quenching a CO-N2 high-temperature plasma. In order to investigate effects of water remaining in an experimental vacuum chamber, optical emission spectroscopic and mass spectrometric measurements were conducted with CO-N2 and CO-N2-H2 gas mixtures. Although residual hydrogen atoms were detected in the CO-N2 experiment, the amount of them was much less than that in the CO-N2-H2 experiment.
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Affiliation(s)
- S Miyakawa
- Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori, Japan
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Watanabe T, Sasaki Y, Miyauchi S, Putz B, Fujimaki N, Nielsen M, Takino R, Miyakawa S. Attention-regulated activity in human primary visual cortex. J Neurophysiol 1998; 79:2218-21. [PMID: 9535981 DOI: 10.1152/jn.1998.79.4.2218] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.0] [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: 02/07/2023] Open
Abstract
Effects of attention to a local contour of a moving object on the activation of human primary visual cortex (area V1) were examined. Local cerebral oxygenation changes (an index of neuronal activity) in human area V1 were measured with functional magnetic resonance imaging (fMRI) in conditions including the following two: 1) when attention was selectively directed toward one side of a moving wedge (the attention condition) and 2) when the wedges were viewed passively (the passive condition). Activation in area V1 was found to be higher in the attention condition than in the passive condition. To our knowledge, this is the first finding that attention to motion activates as early as area V1. We suggest that attentional activation of area V1 is task dependent.
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Affiliation(s)
- T Watanabe
- Department of Psychology, Boston University, Boston, Massachusetts 02215, USA
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Abstract
We report a case of granulomatous mycosis fungoides that progressed into fatal gastrointestinal involvement 4 years after the onset of skin lesions, despite improvement of the skin lesions in response to a combination of PUVA and systemic interferon-gamma therapy. Histological examination showed Pautrier's microabscesses with granuloma annulare-like features and sarcoidal granuloma formation in the plaque stage, proliferation of blast-transformed atypical lymphocytes with persistent granuloma formation in the tumour stage, and metastatic lesions. A literature review of granulomatous mycosis fungoides revealed that 11 of the 24 reported cases died of the disease, and like our case, seven died within 5 years. We suggest that mycosis fungoides with granulomatous reactions does not indicate a favourable prognosis.
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Affiliation(s)
- K R Chen
- Division of Dermatology, Ogikubo Hospital, Tokyo, Japan
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Abstract
BACKGROUND Despite the frequency of small vessel vasculitis in skin lesions of Behçet's disease (BD), BD is classified as a neutrophilic dermatosis. OBJECTIVE Our goal was to determine whether the various cutaneous manifestations of BD are secondary to cutaneous vasculitis. METHODS Twenty-three specimens with histologically proven necrotizing vasculitis from 20 of 42 patients with BD were investigated. RESULTS The cutaneous vasculitic manifestations were characterized as erythema nodosum-like eruptions, palpable purpura, hemorrhagic blisters, infiltrated erythema, Sweet's syndrome-like eruptions, papulopustular lesions, and extragenital ulcerations. Combinations of various skin lesions were commonly seen in the same patient. Venous vessels in the entire dermis to the subcutis were affected with sparing of arterial vessels from middermis to subcutis. Histologic features included leukocytoclastic vasculitis in seven and lymphocytic vasculitis in 13 patients with extensive to focal localized fibrinoid necrosis of vessel walls. CONCLUSION Cutaneous vasculitis in BD is predominantly venulitis or phlebitis. Approximately half (48%; 20 of 42) of BD patients with cutaneous lesions had either lymphocytic (31%; 13 of 42) or leukocytoclastic vasculitis (17%; 7 of 42). We suggest that BD be considered as a vasculitis-associated disease separate from the neutrophilic dermatoses.
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Affiliation(s)
- K R Chen
- Division of Dermatology, Kawasaki City Hospital, Tokyo, Japan
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Miyakawa S, Horiguchi A, Hayakawa M, Ishihara S, Miura K, Horiguchi Y, Imai H, Mizoguchi Y, Kuroda M. Intraductal papillary adenocarcinoma with mucin hypersecretion and coexistent invasive ductal carcinoma of the pancreas with apparent topographic separation. J Gastroenterol 1996; 31:889-93. [PMID: 9027658 DOI: 10.1007/bf02358621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 02/04/2023]
Abstract
We report a 66-year-old man who had a cystic intraductal papillary adenocarcinoma containing a papillary adenoma, in the head of the pancreas and a coexistent invasive, well differentiated solid tubular adenocarcinoma in the tail of the pancreas. He was hospitalized with acute epigastralgia. Computed tomography demonstrated a multilocular cystic mass in the head of the pancreas and a solid tumor in the tail. Endoscopic retrograde pancreatography showed mucin secretion from an enlarged papilla of Vater, marked dilatation of the main pancreatic duct in the head and body, cystic dilatation of the uncinate branch, and irregular narrowing of the main pancreatic duct in the tail. Total pancreatectomy was performed. Between the cystic tumor and the solid tumor there was a distance of 4.8 cm of normal pancreatic parenchyma and duct, recognized both grossly and microscopically. The patient died 35 months after the operation. At autopsy, peritonitis carcinomatosa was found in the abdominal cavity. Microscopically, disseminated nodules were also well differentiated tubular adenocarcinoma. The apparent anatomic separation of these two tumors within the pancreas is extremely unusual.
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MESH Headings
- Aged
- Carcinoma, Ductal, Breast/metabolism
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/surgery
- Carcinoma, Intraductal, Noninfiltrating/metabolism
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Carcinoma, Intraductal, Noninfiltrating/surgery
- Fatal Outcome
- Humans
- Male
- Mucins/metabolism
- Neoplasms, Second Primary/metabolism
- Neoplasms, Second Primary/pathology
- Neoplasms, Second Primary/surgery
- Pancreatectomy
- Pancreatic Neoplasms/metabolism
- Pancreatic Neoplasms/pathology
- Pancreatic Neoplasms/surgery
- Tomography, X-Ray Computed
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Affiliation(s)
- S Miyakawa
- Second Department of Gastroenterological Surgery, Fujita Health University, Toyoake, Japan
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Abstract
We applied dual-flex coils in a phased-array configuration to obtain high resolution MR images of the bilateral hips and compared the image quality with non-phased-array imaging. Multiple fast spin-echo images of both hips were obtained in a single acquisition. Two consecutive acquisitions with and without phased-array capability were performed in 22 hips and a fluid-filled phantom. The signal-to-noise ratio (S/N) enhancement values were calculated. Subjective image analysis was also obtained from three independent reviewers. High quality MR images were obtained using dual-array coils with a S/N enhancement value of 1.40 for a phantom and 1.83 to 2.22 for subject hips. On subjective analysis, the dual array enhanced delineation of the acetabular labrum, articular cartilage, and retained fluid. The dual array may be of diagnostic value with a higher S/N enhancement and subjective superiority of the images obtained.
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Affiliation(s)
- M Niitsu
- Department of Radiology, University of Taukuba, Ibaraki, Japan
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Miyakawa S, Hayakawa M, Horiguchi A, Mizuno K, Ishihara S, Niwamoto N, Miura K. Estimation of fat absorption with the 13C-trioctanoin breath test after pancreatoduodenectomy or pancreatic head resection. World J Surg 1996; 20:1024-8; discussion 1028-9. [PMID: 8798360 DOI: 10.1007/s002689900156] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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: 02/02/2023]
Abstract
The aim of this study was to determine if fat absorption is better after pylorus-preserving pancreatoduodenectomy (PPPD) or duodenum-preserving pancreatic head resection (DPPHR) compared with that following pancreatoduodenectomy with gastrectomy (SPD), provided the patients have similar pancreatic exocrine function. Fat absorption was studied using the 13C-trioctanoin breath test in patients who were grouped according to the degree of fibrosis of the pancreatic remnant. The latter was judged by histologically measuring the fibrosis in a transectional wedge of resected pancreas. We evaluated 11 SPD cases, 25 PPPD cases, and 9 DPPHR cases. The 13C excretion rates and cumulative excretion values following DPPHR or PPPD were significantly better than those following SPD. The 13C excretion rates and cumulative values for the patients with > 30% fibrosis of the pancreas were lower than those in patients with < 30% pancreatic fibrosis, regardless of the surgical procedure. The cumulative value in the SPD group, however, was lower than that in the PPPD or DPPHR patients with < 30% pancreatic fibrosis. The results suggested that fat absorption following PPPD or DPPHR is superior to that after SPD in patients with the same fibrotic area of the pancreatic remnant and depends on the degree of fibrosis in the pancreatic remnant.
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Affiliation(s)
- S Miyakawa
- Second Department of Gastroenterological Surgery, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutukake, Toyoake 470-11, Aichi, Japan
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Abstract
Photoallergy to vitamin B6 is very rare; only a few cases of contact dermatitis and one case of photosensitive dermatitis due to pyritinol have been reported. We report here the first case of photoallergic drug eruption due to pyridoxine hydrochloride. A 71-year-old man developed papulo-squamous erythemata which were confined to sun-exposed sites. Photopatch testing, together with the clinical course, was helpful in reaching the initial diagnosis; this was confirmed by an oral challenge test. Photoallergic drug eruption due to vitamin B6 should be considered a rare cause of photosensitive dermatitis.
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Affiliation(s)
- M Tanaka
- Division of Dermatology, Kawasaki Municipal Hospital, Japan
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Miyakawa S, Mizuno K, Horiguchi A, Hayakawa M, Ishihara S, Miura K. Complete transection of the left hepatic duct due to blunt abdominal trauma. Hepatogastroenterology 1996; 43:1395-8. [PMID: 8908581] [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: 02/03/2023]
Abstract
A 21-year-old man was transferred to our hospital after a traffic accident. He had chief complaint of right upper abdominal pain. Abdominal computed tomography scan at admission showed fluid collection in the abdominal cavity and linear low density area in the hepatic hilus including segment V of the liver. Operative findings revealed a hepatic laceration extending from the boundary between segment IV and segment V to the hepatic hilus, and a completely transection of the left hepatic duct near the caudate lobe without ischemic change and contusion. The bile duct of the caudate lobe communicated with the left hepatic bile duct at the distal portion of the torn wedge, and was not injured. The transected bile duct was primarily repaired with an interrupted end-to-end anastomosis using a retrograde transhepatic bile duct tube (RTBD tube) as stent. Intra- and postoperative cholangiography via the tube revealed no leakage or narrowing. He is in good health for 60 months after surgery. The case illustrates the condition of the transectional wedges for end-to-end anastomosis, and the usefulness of RTBD tube for the anastomotic stent and the diagnosis of bile leakage after anastomosis.
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Affiliation(s)
- S Miyakawa
- Second Department of Gastroenterological Surgery, Fujita-Health University School of Medicine, Toyoake, Japan
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Affiliation(s)
- A Toyohara
- Division of Dermatology, Kawasaki City Hospital, Kanagawa, Japan
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Takada T, Kato H, Matsushiro T, Nimura Y, Nagakawa T, Nakayama T, Yamauchi H, Ogata Y, Shimada H, Miyakawa S, Yamaguchi A, Sakoda K, Yasuda H, Tsukada K, Yoshida K, Ashida H, Ishikawa Y, Kotoura Y, Kinoshita H, Kajiwara T, Watanabe G, Uchimura M, Funabiki T, Ikeda S, Okada S. [Prospective randomized trial comparing 1/2 FAM (5-fluorouracil (5-FU) + adriamycin + mitomycin C) versus palliative therapy for the treatment of unresectable pancreatic and biliary tract carcinomas (the 2nd trial in non-resectable patients). Japanese Study Group of Surgical Adjuvant Therapy for Carcinomas of the Pancreas and Biliary Tract]. Gan To Kagaku Ryoho 1996; 23:707-14. [PMID: 8645022] [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: 02/01/2023]
Abstract
The efficacy of 1/2 FAM, which consists of 5-fluorouracil (5-FU), adriamycin (ADM) and mitomycin C (MMC), was compared with that of palliative treatment in patients with unresectable pancreatic and biliary tract carcinomas in a multicenter randomized trial. The patients assigned to 1/2 FAM group were treated with 5-FU 200 mg/m2/day IV, ADM 15 mg/m2/day IV and MMC 5 mg/m2/day IV. These 3 drugs were given concurrently as the initial dose within a week after palliative operation, and this regimen was repeated for at least 2 whole courses, at 4-week intervals before the next course of therapy. Those randomized to the control group were subjected to palliative treatment alone. Completely eligible for analysis were 42 cases of the 1/2 FAM group and 41 of the control group. There was no significant difference between the groups with respect to the overall and differentiated survival times according to the tumor sites and the clinical efficacy. As for the duration of 50% inhibition of tumor progression, a significantly better outcome was obtained in 1/2 FAM group. Tumor progression was most significantly inhibited in patients with gallbladder carcinoma. In 1/2 FAM group, tumor reduction was achieved in 1 CR and 2 PR patients. The most frequent adverse reaction was gastrointestinal manifestations, along with diarrhea and alopecia. 1/2 FAM did not contribute to the life prolongation, but inhibited the tumor progression for a significantly longer duration and, to a lesser extent, reduced the tumor size in unresectable pancreatic and biliary tract carcinomas. This regimen is suggested to be useful particularly in the treatment of the latter carcinoma.
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Affiliation(s)
- T Takada
- 1st Dept. of Surgery, Teikyo University, Japan
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