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Kato T, Mizuno K, Nishio H, Matsumoto D, Kamisawa H, Kurokawa S, Nakane A, Maruyama T, Yasui T, Hayashi Y. Dysfunction of the blood–testis barrier in undescended testes and the role of androgens in the blood–testis barrier composition. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00244-0] [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: 02/12/2023]
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2
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Okano DR, Hasegawa H, Okada H, Kawamoto E, Kurokawa S, Kakogawa J, Suzuki Y, Camann W, Nagasaka Y. Valley position for a primary ciliary dyskinesia (Kartagener's syndrome) parturient to optimize respiratory function during cesarean delivery. Int J Obstet Anesth 2023; 53:103619. [PMID: 36604283 DOI: 10.1016/j.ijoa.2022.103619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/01/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022]
Affiliation(s)
- D R Okano
- Department of Anesthesia, Indiana University School of Medicine, Indianapolis, IN, USA
| | - H Hasegawa
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan
| | - H Okada
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan; Department of Anesthesiology and Pain Medicine, Juntendo University Urayasu Hospital, Chiba, Japan
| | - E Kawamoto
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan
| | - S Kurokawa
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan
| | - J Kakogawa
- Department of Obstetrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Y Suzuki
- Department of Anesthesia, National Center for Child Health and Development, Tokyo, Japan
| | - W Camann
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Y Nagasaka
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan.
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Kageura K, Hamaoka Y, Kurokawa S, Makino J, Oshikawa M, Tanimoto Y. On commentary: 'The responsibility of the Japanese media, the Fukushima accident and the use of personal data' by T. Sawano et al. QJM 2022; 114:901-902. [PMID: 33904581 DOI: 10.1093/qjmed/hcab081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Kageura
- Graduate School of Education, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Y Hamaoka
- Faculty of Business and Commerce, Keio University, 2-15-45 Mita, Minato-ku, Tokyo 108-8345, Japan
| | - S Kurokawa
- Accelerator Department, Kek, High Energy Accelerator Research Organization, Oho 1-1 Tsukuba, Ibaraki 305-0801, Japan
| | - J Makino
- Department of Planetology, Graduate School of Science/Faculty of Science, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - M Oshikawa
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Y Tanimoto
- Dipartimento di Matematica, Università di Roma "Tor Vergata", Via della Ricerca Scientifica 1, Roma 00133, Italy
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Yamashita K, Kusuda K, Ito Y, Komino M, Tanaka K, Kurokawa S, Ameya M, Eba D, Masamune K, Muragaki Y, Ohta Y, Rinoie C, Yamada K, Sawa Y. Evaluation of Surgical Instruments With Radiofrequency Identification Tags in the Operating Room. Surg Innov 2018; 25:374-379. [DOI: 10.1177/1553350618772771] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background. Surgical instrument retention and instrument breakage compromise surgery quality and lead to medical malpractice. We developed an instrument tracking system that could alert surgeons to instrument retention during surgery and monitor instrument use to reduce the risk of breakage. Methods. This prospective, experimental clinical trial included 15 patients undergoing inguinal hernia surgery or lumpectomy under general anesthesia at Saiseikai Kurihashi Hospital. Radiofrequency identification (RFID)-tagged surgical instruments were used, and a detection antenna was placed on a mayo stand during the operation. We analyzed the 1-loop detection ratio (OLDR)—that is, the capability of the antenna to detect devices in a single reading—and the total detection rate (TDR)—that is, the data accumulated for the duration of the operation—of the RFID-tagged instruments. Results. Data analysis revealed that the OLDR was 95% accurate, whereas the TDR was 100% accurate. The antenna could not detect the RFID tag when there was interference from electrocautery noise radiation, and 6% of instrument movement was undetected by the antenna; however, the TDR and instrument use were detected at all times. Conclusions. Surgical instruments can be tracked during surgery, and this tracking can clarify the usage rate of each instrument and serve as a backup method of instrument counting. However, this study was conducted on a small scale, and RFID tags cannot be attached to small surgical instruments used in complex operations such as neurosurgery. Further efforts to develop a tracking system for these instruments are warranted.
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Affiliation(s)
| | | | | | | | | | - Satoru Kurokawa
- National Institute of Advanced Industrial Science and Technology, Ibaraki, Japan
| | - Michitaka Ameya
- National Institute of Advanced Industrial Science and Technology, Ibaraki, Japan
| | | | | | | | | | - Chugo Rinoie
- Methodist Hospital of Southern California, Arcadia, CA, USA
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Valadão P, Kurokawa S, Finni T, Avela J. Effects of muscle action type on corticospinal excitability and triceps surae muscle-tendon mechanics. J Neurophysiol 2018; 119:563-572. [PMID: 29118191 DOI: 10.1152/jn.00079.2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
This study investigated whether the specific motor control strategy reported for eccentric muscle actions is dependent on muscle mechanical behavior. Motor evoked potentials, Hoffman reflex (H-reflex), fascicle length, pennation angle, and fascicle velocity of soleus muscle were compared between isometric and two eccentric conditions. Ten volunteers performed maximal plantarflexion trials in isometric, slow eccentric (25°/s), and fast eccentric (100°/s) conditions, each in a different randomized testing session. H-reflex normalized by the preceding M wave (H/M) was depressed in both eccentric conditions compared with isometric ( P < 0.001), while no differences in fascicle length and pennation angle were found among conditions. Furthermore, although the fast eccentric condition had greater fascicle velocity than slow eccentric ( P = 0.001), there were no differences in H/M. There were no differences in motor evoked potential size between conditions, and silent period was shorter for both eccentric conditions compared with isometric ( P = 0.009). Taken together, the present results corroborate the hypothesis that the central nervous system has an unique activation strategy during eccentric muscle actions and suggest that sensory feedback does not play an important role in modulating these muscle actions. NEW & NOTEWORTHY The present study provides new insight into the motor control of eccentric muscle actions. It was demonstrated that task-dependent corticospinal excitability modulation does not seem to depend on sensory information processing. These findings support the hypothesis that the central nervous system has a unique activation strategy during eccentric muscle actions.
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Affiliation(s)
- P Valadão
- Neuromuscular Research Center, Department of Biology of Physical Activity, University of Jyväskylä , Jyväskylä , Finland
| | - S Kurokawa
- Center for Liberal Arts, Meiji Gakuin University , Yokohama , Japan
| | - T Finni
- Neuromuscular Research Center, Department of Biology of Physical Activity, University of Jyväskylä , Jyväskylä , Finland
| | - J Avela
- Neuromuscular Research Center, Department of Biology of Physical Activity, University of Jyväskylä , Jyväskylä , Finland
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Watanabe I, Watanabe R, Okumura Y, Nagashima K, Iso K, Takahashi K, Arai M, Kurokawa S, Ohkubo K, Nakai T, Hirayama A. P865Association between serum adiponectin, female sex, NT-proBNP, and post-ablation recurrence of atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux151.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Takayama K, Myouchin K, Wada T, Kotsugi M, Kurokawa S, Kichikawa K. P-002 Incidence and Prognosis of Plaque Protrusion during Carotid Artery Stenting. J Neurointerv Surg 2016. [DOI: 10.1136/neurintsurg-2016-012589.44] [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: 11/03/2022]
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Takayama K, Wada T, Myouchin K, Nakagawa H, Taoka T, Nakagawa I, Kurokawa S, Kichikawa K. E-132 diagnostic accuracy of magnetic resonance angiography following coil embolization with the enterprise stent for cerebral aneurysm. J Neurointerv Surg 2015. [DOI: 10.1136/neurintsurg-2015-011917.206] [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: 11/03/2022]
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Kurokawa S, Kabayama J, Hwang SD, Nho SW, Hikima JI, Jung TS, Kondo H, Hirono I, Takeyama H, Mori T, Aoki T. Whole genome analyses of marine fish pathogenic isolate, Mycobacterium sp. 012931. Mar Biotechnol (NY) 2014; 16:572-579. [PMID: 24879010 DOI: 10.1007/s10126-014-9576-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 04/28/2014] [Indexed: 06/03/2023]
Abstract
Mycobacterium is a genus within the order Actinomycetales that comprises of a large number of well-characterized species, several of which includes pathogens known to cause serious disease in human and animal. Here, we report the whole genome sequence of Mycobacterium sp. strain 012931 isolated from the marine fish, yellowtail (Seriola quinqueradiata). Mycobacterium sp. 012931 is a fish pathogen causing serious damage to aquaculture farms in Japan. DNA dot plot analysis showed that Mycobacterium sp. 012931 was more closely related to Mycobacterium marinum when compared across several Mycobacterium species. However, little conservation of the gene order was observed between Mycobacterium sp. 012931 and M. marinum genome. The annotated 5,464 genes of Mycobacterium sp. 012931 was classified into 26 subsystems. The insertion/deletion gene analysis shows Mycobacterium sp. 012931 had 643 unique genes that were not found in the M. marinum strains. In the virulence, disease, and defense subsystem, both insertion and deletion genes of Mycobacterium sp. 012931 were associated with the PPE gene cluster of Mycobacteria. Of seven plcB genes in Mycobacterium sp. 012931, plcB_2 and plcB_3 showed low identities with those of M. marinum strains. Therefore, Mycobacterium sp. 012931 has differences on genetic and virulence from M. marinum and may induce different interaction mechanisms between host and pathogen.
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Affiliation(s)
- Satoru Kurokawa
- Agricultural and Veterinary Division, Animal Health Department of Research and Development, Meiji Seika Pharma, 2-4-16, Kyobashi, Chuo-ku, Tokyo, 104-8002, Japan
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Takayama K, Myouchin K, Wada T, Nakagawa H, Kichikawa K, Kurokawa S. E-065 Clinical Treatment Result of Carotid Artery Stenting in Japan: Comparison of Periprocedural Ischemic Complication by Embolic Protection Devices. J Neurointerv Surg 2014. [DOI: 10.1136/neurintsurg-2014-011343.132] [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: 11/03/2022]
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Sagisaka T, Kurokawa S, Sakai A, Yamashita KI, Taguchi M, Asano M, Sugiura KI. Conductance of Au/1,4-benzenedicarbothioamide/Au molecular junctions: A proposal for a potential linker. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.01.054] [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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Naito M, Sakoda Y, Kamikawa T, Nitta Y, Hirose K, Sakashita M, Kurokawa S, Kida H. Serological Evidence of Leptospiral Infection in Pig Populations in Different Districts in Japan. Microbiol Immunol 2013; 51:593-9. [PMID: 17579270 DOI: 10.1111/j.1348-0421.2007.tb03945.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 11/28/2022]
Abstract
Serum samples were collected from 938 pigs of 24 farms in Hokkaido, Kagoshima, and Okinawa prefectures in Japan in 2001-2005. Enzyme-linked immunosorbent assay (ELISA) was used for the detection of antibodies to LipL32 antigen which is common to Leptospira interrogans. Samples positive in ELISA were then investigated by microscopic agglutination test for the identification of causal leptospires. Antibodies specific to leptospires of serovars Copenhageni, Bratislava, Australis and Javanica were detected in serum samples of pigs from each of the three districts. In addition, antibodies to leptospires of serovars Autumnalis and Tarassovi were predominantly detected in those from Kagoshima. The present study, thus, revealed that leptospires belonging to different serovars prevail in the pig population in Japan. In addition, it is the first detection of antibodies to leptospires belonging to serovars Javanica and Tarassovi in pigs in Japan.
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Affiliation(s)
- Michiko Naito
- Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Japan
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Kurokawa S, Kabayama J, Hwang SD, Nho SW, Hikima JI, Jung TS, Sakai M, Kondo H, Hirono I, Aoki T. Comparative genome analysis of fish and human isolates of Mycobacterium marinum. Mar Biotechnol (NY) 2013; 15:596-605. [PMID: 23728847 DOI: 10.1007/s10126-013-9511-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 04/09/2013] [Indexed: 06/02/2023]
Abstract
Mycobacterium marinum is a major causative agent of mycobacteriosis in fish that has a broad range of hosts, including in human isolates. So far, genomic analyses have focused on the human isolate. Here, we compared the draft genome sequences of two strains of M. marinum isolated from fish (MB2 and Europe) with the M. marinum M isolated from humans. M. marinum MB2 and Europe have single, circular chromosomes of 6,134,389 and 6,029,340 bp, and average G + C contents of 65.7 and 65.5 %, respectively. A total of 5,464 coding DNA sequences were annotated in both M. marinum MB2 and Europe genome. Dot plot analyses showed that M. marinum MB2 and Europe were closer to M. marinum M when compared to three other Mycobacterium species. The insertion/deletion gene analysis showed that M. marinum MB2 and Europe contained 342 and 487 genes that were not found in M. marinum M, and lacked 625 and 776 genes found in M. marinum M, respectively. Most of the inserted and deleted genes were classified in the fatty acid, lipid, and isoprenoid subsystem and the virulence, disease, and defense subsystem. Therefore, these results provide insights into the genomic diversity associated with variable hosts and pathogens.
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Affiliation(s)
- Satoru Kurokawa
- Animal Health Department of Research and Development Agricultural and Veterinary Division, Meiji Seika Pharma, 2-4-16, Kyobashi, Chuo-ku, Tokyo, 104-8002, Japan
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Oikawa J, Niwano S, Ishizue N, Yoshizawa T, Satoh A, Kurokawa S, Hatakeyama Y, Fukaya H, Niwano H. Use of statins suppress the shorting of the fibrillation cycle length in patients with new-onset atrial fibrillation -Possible anti-remodeling effect of statin for atrial structural remodeling. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p4964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kurokawa S, Kabayama J, Fukuyasu T, Hwang SD, Park CI, Park SB, del Castillo CS, Hikima JI, Jung TS, Kondo H, Hirono I, Takeyama H, Aoki T. Bacterial classification of fish-pathogenic Mycobacterium species by multigene phylogenetic analyses and MALDI Biotyper identification system. Mar Biotechnol (NY) 2013; 15:340-348. [PMID: 23229498 DOI: 10.1007/s10126-012-9492-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 09/19/2012] [Indexed: 06/01/2023]
Abstract
Mycobacterium marinum is difficult to distinguish from other species of Mycobacterium isolated from fish using biochemical methods. Here, we used genetic and proteomic analyses to distinguish three Mycobacterium strains: M. marinum strains MB2 and Europe were isolated from tropical and marine fish in Thailand and Europe, and Mycobacterium sp. 012931 strain was isolated from yellowtail in Japan. In phylogenetic trees based on gyrB, rpoB, and Ag85B genes, Mycobacterium sp. 012931 clustered with M. marinum strains MB2 and Europe, but in trees based on 16S rRNA, hsp65, and Ag85A genes Mycobacterium sp. 012931 did not cluster with the other strains. In proteomic analyses using a Bruker matrix-assisted laser desorption ionization Biotyper, the mass profile of Mycobacterium sp. 012931 differed from the mass profiles of the other two fish M. marinum strains. Therefore, Mycobacterium sp. 012931 is similar to M. marinum but is not the same, suggesting that it could be a subspecies of M. marinum.
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Affiliation(s)
- Satoru Kurokawa
- Animal Health Department of Research and Development Agricultural and Veterinary Division, Meiji Seika Pharma, 2-4-16, Kyobashi, Chuo-ku, Tokyo, 104-8002, Japan
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Takayama K, Taoka T, Myouchin K, Wada T, Nakagawa H, Kichikawa K, Kurokawa S. E-069 Restenosis after carotid artery stenting using the carotid wallstent: frequency of restenosis and effect of cilostazol in preventing restenosis. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.69] [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: 11/04/2022]
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Takayama K, Taoka T, Nakagawa H, Myouchin K, Wada T, Sakamoto M, Furuichi K, Iwasaki S, Kurokawa S, Kichikawa K. Effect of cilostazol in preventing restenosis after carotid artery stenting using the carotid wallstent: a multicenter retrospective study. AJNR Am J Neuroradiol 2012; 33:2167-70. [PMID: 22595898 DOI: 10.3174/ajnr.a3127] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND PURPOSE Restenosis after CAS is a postoperative problem, with a reported frequency of approximately 2%-8%. However differences in stent design, procedure, and the antiplatelet agent appear to affect the incidence of restenosis. We assessed the frequency of restenosis and the effect of the antiplatelet agent CLZ in preventing restenosis after CAS by the standard procedure using the CWS. MATERIALS AND METHODS Between May 2010 and October 2011, 62 lesions in 60 consecutive patients underwent CAS using the CWS at 4 medical institutions, and all patients were followed clinically and assessed by sonography, 3D-CTA, or angiography at 3 and 6 months postoperatively. Restenosis was defined as ≥50% stenosis. The incidence of restenosis and the variation in the incidence of restenosis by the difference in type of antiplatelet agent between the CLZ group (n = 30; aspirin, 100 mg, and CLZ, 200 mg) and the non-CLZ group (n = 32; aspirin, 100 mg, and clopidogrel, 75 mg [n = 29]; or ticlopidine, 100 mg [n = 2] or 200 mg [n = 1]) were retrospectively investigated. Two antiplatelet agents were given starting 1 week preoperatively until at least 3 months postoperatively. RESULTS Restenosis occurred in 5 patients (8.3%), but all were cases of asymptomatic lesions in the follow-up period. All 5 patients with restenosis were in the non-CLZ group, with no cases of restenosis in the CLZ group; the difference was significant (P = .0239). CONCLUSIONS The restenosis rate after CAS by using the CWS was 8.3%. CLZ was associated with significant inhibition of restenosis.
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Affiliation(s)
- K Takayama
- Departments of Radiology and Interventional Neuroradiology, Ishinkai Yao General Hospital, Yao, Japan.
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Takayama K, Miyouchin K, Sakamoto M, Taoka T, Wada T, Nakagawa H, Kichikawa K, Kurokawa S. P-029 Usefulness of 3D time-of-flight magnetic resonance angiography (MRA) and contrast-enhanced MRA following coil embolization with the Enterprise stent for cerebral aneurysm. J Neurointerv Surg 2011. [DOI: 10.1136/neurintsurg-2011-010097.63] [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: 11/04/2022]
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Takayama K, Nakagawa H, Taoka T, Miyouchin K, Wada T, Sakamoto M, Miyasaka T, Akashi T, Kichikawa K, Kurokawa S. O-003 Prediction of periprocedual ischemic complication in carotid artery stenting with filter embolic protection device: feasibility of MR plaque imaging. J Neurointerv Surg 2010. [DOI: 10.1136/jnis.2010.003244.3] [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: 11/03/2022]
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Takayama K, Wada T, Nakagawa H, Miyasaka T, Miyouchin K, Sakamoto M, Taoka T, Kichikawa K, Kurokawa S. 012 Symptomatic chronic total internal carotid artery occlusion treated successfully with stenting and angioplasty: a case report. J Neurointerv Surg 2009. [DOI: 10.1136/jnis.2009.000869l] [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: 11/03/2022]
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Niwano S, Wakisaka Y, Niwano H, Fukaya H, Kurokawa S, Kiryu M, Hatakeyama Y, Izumi T. Prognostic significance of frequent premature ventricular contractions originating from the ventricular outflow tract in patients with normal left ventricular function. Heart 2009; 95:1230-7. [DOI: 10.1136/hrt.2008.159558] [Citation(s) in RCA: 204] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Fujiwara Y, Kurokawa S, Shibata Y, Asakura Y, Harado M, Komatsu T. Sympathovagal effects of spinal anaesthesia with intrathecal or intravenous fentanyl assessed by heart rate variability. Acta Anaesthesiol Scand 2009; 53:476-82. [PMID: 19226297 DOI: 10.1111/j.1399-6576.2008.01800.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [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: 01/22/2023]
Abstract
BACKGROUND Although many investigators previously reported the sympathovagal effect of spinal anaesthesia, there is no information about the sympathovagal effects of supplementation with fentanyl. The aim of this study was to evaluate the sympathovagal effects of intrathecal or intravenous fentanyl added to spinal anaesthesia. METHODS One hundred and twenty patients undergoing elective transurethral surgery under spinal anaesthesia were randomly allocated to receive intrathecally either isobaric bupivacaine alone (Group B), bupivacaine supplemented with intrathecal (Group Ft) or with intravenous fentanyl (Group Fv). Heart rate variability was estimated using the MemCalc method (Tarawa, Suwa Trust, Japan) before and after spinal anaesthesia. RESULTS In all groups, spinal anaesthesia significantly decreased low frequency/high frequency (LF/HF) as a marker of sympathovagal balance. However, patients in Group B with a low block height developed a marked increase in LF/HF after spinal anaesthesia, which was attenuated in Group Ft. Meanwhile, intravenous fentanyl did not attenuate this response. CONCLUSION We conclude that sympathetic activation observed in patients with a low block height was attenuated by intrathecal fentanyl but not by intravenous fentanyl.
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Affiliation(s)
- Y Fujiwara
- Department of Anaesthesiology, Aichi Medical University, 21 Karimata Yazako, Nagakute, Aichi, Japan.
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Abstract
Electron transmission through individual 1,4-benzenedithiol molecules bridging between two gold electrodes (Au/BDT/Au junctions) has been studied by measuring the current-voltage (I-V) characteristics. Measurements were made at room temperature on three junction states of conductance 0.005G(0), 0.01G(0), and 0.1G(0), respectively, where G(0) is the quantum unit of conductance. All I-V curves are linear around zero bias and nonlinearly increase upward for biases above approximately 0.2 V. Absence of plateaus in the observed I-V characteristics up to +/- 1 V indicates that the electron transmission spectrum of Au/BDT/Au has no peaks within +/- 0.5 eV from the Fermi level.
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Affiliation(s)
- K Horiguchi
- Department of Materials Science and Engineering, Kyoto University, Kyoto, Japan
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Mizutani N, Suda M, Ishimura M, Kurokawa S, Nabe T, Kohno S. Effects of KP-496, a novel dual antagonist of leukotriene D(4) and thromboxane A (2) receptors on nasal blockage in guinea pig models of allergic rhinitis. Inflamm Res 2008; 57:247-51. [PMID: 18516714 DOI: 10.1007/s00011-007-7067-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE AND DESIGN KP-496 is a novel dual antagonist for leukotriene (LT) D(4) and thromboxane (TX) A(2) receptors. We investigated effects of KP-496 on antigeninduced nasal blockage in 2 guinea pig models of allergic rhinitis. SUBJECTS Male Hartley guinea pigs were used. TREATMENT Animals were actively sensitized with ovalbumin (OVA) or Japanese cedar pollen, and were then repeatedly challenged with OVA or pollen, respectively. KP-496 (0.003 %-0.05 %) was intranasally administered 0.5 or 1 h before and 2 h after an antigen challenge. METHODS As an indicator of nasal blockage, specific airway resistance was measured using a double-flow plethysmograph system. Statistical analyses were performed with Dunnett's test (OVA model) or t-test (pollen model). RESULTS Although early phase response was not affected by even a high dose (0.03 %) of KP-496, late phase nasal blockage (1.68 +/- 0.26) was inhibited by 0.01 % (0.87 +/- 0.19; p <0.05) and 0.03 % (0.44 +/- 0.12; p <0.01) of KP-496 in the OVA model. On the other hand, both early (5.60 +/- 0.77) and late phase responses (7.90 +/- 1.70) were inhibited by 0.05 % KP-496 to 2.68 +/- 0.84 (p <0.05) and 2.71 +/- 0.83 (p <0.05), respectively, in the pollen model, in which nasal hyperresponsiveness had been acquired by multiple challenges. CONCLUSIONS KP-496 may be clinically effective for nasal blockage in allergic rhinitis.
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Affiliation(s)
- N Mizutani
- Department of Pharmacology, Kyoto Pharmaceutical University, Ltd., 5 Nakauchi, Misasagi, Yamashina, Kyoto 607-8414, Japan
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Kurokawa S, Kikuchi T, Sakairi M, Takahashi H. Fabrication of micro-dot arrays and micro-walls of acrylic acid/melamine resin on aluminum by AFM probe processing and electrophoretic coating. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.12.074] [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: 11/16/2022]
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Arai YCP, Kato N, Matsura M, Ito H, Kandatsu N, Kurokawa S, Mizutani M, Shibata Y, Komatsu T. Transcutaneous electrical nerve stimulation at the PC-5 and PC-6 acupoints reduced the severity of hypotension after spinal anaesthesia in patients undergoing Caesarean section. Br J Anaesth 2008; 100:78-81. [PMID: 17959591 DOI: 10.1093/bja/aem306] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y C P Arai
- Multidisciplinary Pain Centre, Aichi Medical University School of Medicine, 21 Karimata, Nagakutecho, Aichigun, Aichi 480-1195, Japan.
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Ishimura M, Suda M, Morizumi K, Kataoka S, Maeda T, Kurokawa S, Hiyama Y. Effects of KP-496, a novel dual antagonist at the cysteinyl leukotriene receptor 1 and the thromboxane A(2) receptor, on airway obstruction in guinea pigs. Br J Pharmacol 2007; 153:669-75. [PMID: 18037905 DOI: 10.1038/sj.bjp.0707602] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND AND PURPOSE KP-496 is a novel dual antagonist for cysteinyl leukotriene receptor 1 (CysLT(1)) and thromboxane A(2) (TXA(2)) receptor (TP). The aim of this study was to evaluate the pharmacological profile of inhaled KP-496 and its effects on airway obstruction. EXPERIMENTAL APPROACH Antagonist activities of inhaled KP-496 were investigated using bronchoconstriction induced in guinea pigs by LTD(4) or U46619, a stable TXA(2) mimetic. Guinea pigs sensitized with injections of ovalbumin were used to assess the effects of inhaled KP-496 on bronchoconstriction induced by antigen (i.v.). Another set of guinea pigs were sensitized and challenged with ovalbumin by inhalation and the effects of inhaled KP-496 on immediate and late airway responses and airway hyperresponsiveness were investigated. KEY RESULTS KP-496 significantly inhibited LTD(4)- and U46619-induced bronchoconstriction in a dose-dependent manner. The inhibitory effects of KP-496 (1%) were comparable to those of montelukast (a CysLT(1) antagonist, p.o., 0.3 mg kg(-1)) or seratrodast (a TP antagonist, p.o., 3 mg kg(-1)). KP-496 (1%) and oral co-administration of montelukast (10 mg kg(-1)) and seratrodast (20 mg kg(-1)) significantly inhibited antigen-induced bronchoconstriction, whereas administration of montelukast or seratrodast separately did not inhibit antigen-induced bronchoconstriction. KP-496 exhibited dose-dependent and significant inhibitory effects on the immediate and late airway responses and airway hyperresponsiveness following antigen challenge. CONCLUSIONS AND IMPLICATIONS KP-496 exerts effects in guinea pigs which could be beneficial in asthma. These effects of KP-496 were greater than those of a CysLT(1) antagonist or a TP antagonist, in preventing antigen-induced airway obstruction.
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Affiliation(s)
- M Ishimura
- Pharmacology Department, Central Research Laboratories, Kaken Pharmaceutical Co. Ltd, Kyoto, Japan.
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Takahata M, Tamura T, Abe K, Mihara H, Kurokawa S, Yamamoto Y, Nakano R, Esaki N, Inagaki K. Selenite Assimilation into Formate Dehydrogenase H Depends on Thioredoxin Reductase in Escherichia coli. J Biochem 2007; 143:467-73. [DOI: 10.1093/jb/mvm247] [Citation(s) in RCA: 21] [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: 11/13/2022] Open
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Imura M, Hayash Y, Kojima Y, Kurokawa S, Nakane A, Mizuno K, Maruyama T, Iwase Y, Kohri K. MP-02.08: Evaluation of the long-term function outcome with uroflowmetry: the meatal-based flip-flap repair for distal hypospadias. Urology 2007. [DOI: 10.1016/j.urology.2007.06.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Omi R, Kurokawa S, Mihara H, Kurihara T, Esaki N, Hirotsu K, Miyahara I. Structural study of selenocysteine lyase. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307097383] [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: 11/11/2022] Open
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Arai YCP, Ito H, Kandatsu N, Kurokawa S, Kinugasa S, Komatsu T. Parental presence during induction enhances the effect of oral midazolam on emergence behavior of children undergoing general anesthesia. Acta Anaesthesiol Scand 2007; 51:858-61. [PMID: 17578463 DOI: 10.1111/j.1399-6576.2007.01339.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [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: 11/28/2022]
Abstract
BACKGROUND Pre-anesthetic anxiety and emergence agitation are major challenges for anesthesiologists in pediatric anesthesia. Thus, sedative premedication and parental presence during induction of anesthesia (PPIA) are used to treat pre-anesthetic anxiety in children. The aim of the present study was to test if a combination of mother presence and midazolam premedication is effective for improving emergence condition in children undergoing general anesthesia. METHODS Sixty children were allocated to one of three groups: a sedative group (0.5 mg/kg oral midazolam), a PPIA group or a sedative and PPIA group. When anesthesia was induced with 7% sevoflurane in 100% oxygen, qualities of mask induction were rated. Anesthesia was maintained with sevoflurane (1.5-2.5%) in 60% oxygen and intravenous fentanyl 4 microg/kg. During emergence from anesthesia, the score of the child's emergence behavior was rated. RESULTS The children in the midazolam group showed a better quality of mask induction compared with those in the PPIA group, the addition of parental presence to oral midazolam did not provide additional improvement of mask induction. In contrast, the children in the midazolam + PPIA group were less agitated than those in the other groups at emergence from anesthesia. CONCLUSION Parental presence during induction of anesthesia enhanced the effect of oral midazolam on emergence behavior of children undergoing general anesthesia.
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Affiliation(s)
- Y-C P Arai
- Multidisciplinary Pain Center, Aichi Medical University, School of Medicine, Aichi, Japan.
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Fujiwara Y, Kurokawa S, Asakura Y, Wakao Y, Nishiwaki K, Komatsu T. Correlation between heart rate variability and haemodynamic fluctuation during induction of general anaesthesia: comparison between linear and non-linear analysis. Anaesthesia 2007; 62:117-21. [PMID: 17223801 DOI: 10.1111/j.1365-2044.2006.04933.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The objective of this study was to compare linear and non-linear analysis of heart rate variability (HRV) in terms of correlation with haemodynamic fluctuation during induction of general anaesthesia. Pre-operatively, HRV was estimated by the MemCalc method in 114 patients scheduled for general anaesthesia. After anaesthesia was induced with propofol, fentanyl and vecuronium bromide, tracheal intubation was performed. Haemodynamic fluctuations during induction of anaesthesia were recorded and the correlation between pre-operative HRV and haemodynamic fluctuation was examined using logistic regression analysis. As an index of non-linear analysis of HRV, ultra short-term entropy (UsEn) correlated better with blood pressure fluctuation than did the ratio of the power of low frequency component of HRV to that of high frequency component (LF/HF). In contrast, although LF/HF significantly correlated with heart rate increase caused by tracheal intubation, the correlation between UsEn and heart rate fluctuation was not significant.
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Affiliation(s)
- Y Fujiwara
- Department of Anaesthesiology, Aichi Medical University, 21 Yazako, Nagakute, Aichi, 480-1195, Japan.
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Kurokawa S, Arimura Y, Yamamoto H, Adachi Y, Endo T, Sato T, Suga T, Hosokawa M, Shinomura Y, Imai K. Tumour matrilysin expression predicts metastatic potential of stage I (pT1) colon and rectal cancers. Gut 2005; 54:1751-8. [PMID: 16284286 PMCID: PMC1774774 DOI: 10.1136/gut.2005.071035] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND AIMS Nodal metastases are indisputable determinants of prognosis for colon and rectal cancer. Using classical histological criteria, many attempts to predict nodal metastasis have failed, preventing the adequate management of stage I (pT1) cancer. We investigated the role of tumour matrilysin in predicting metastatic potential, and discuss its potential use in individualising treatment of pT1 colon and rectal cancer. METHODS The gene signature associated with nodal metastasis was investigated by cDNA array in 24 colon and rectal cancers. We studied 494 colon and rectal cancer patients to identify risk factors for nodal metastasis and evaluated the potential to predict nodal metastasis by either the logistic regression model or the Bayesian neural network model with built-in matrilysin. We then inferred possible causality of nodal metastasis from structural equation modelling. RESULTS cDNA array revealed that matrilysin was maximally upregulated in the metastasis signature identified. Tumour matrilysin expression emerged as a stage independent risk factor for nodal metastasis, resulting in a similar predictive performance in receiver operating characteristic curve analysis in the two models. A Bayesian approach called automatic relevance determination identified matrilysin as one of the most relevant predictors examined. Structural equation modelling suggested possible direct causality between matrilysin and nodal metastasis. CONCLUSIONS We have provided evidence that tumour matrilysin expression is a promising biomarker predicting nodal metastasis of colon and rectal cancer. Analysis of tumour matrilysin expression would help clinicians achieve the goal of individualised cancer treatment based on the metastatic potential of pT1 colon and rectal cancer.
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Affiliation(s)
- S Kurokawa
- First Department of Internal Medicine, Sapporo Medical University, S-1, W-16, Chuo-ku, Sapporo 060-8543, Japan
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Kurokawa S, Shibaike H, Akiyama H, Yoshimura Y. Molecular and morphological differentiation between the crop and weedy types in velvetleaf (Abutilon theophrasti Medik.) using a chloroplast DNA marker: seed source of the present invasive velvetleaf in Japan. Heredity (Edinb) 2004; 93:603-9. [PMID: 15354188 DOI: 10.1038/sj.hdy.6800569] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/09/2022] Open
Abstract
A comparison of chloroplast DNA (cpDNA) sequences was carried out between the crop and weed types of Abutilon theophrasti to clarify the seed source of the present weedy velvetleaf in Japan. A sequencing analysis of approx. 6% of the chloroplast genome (ca 10 kbp) detected three nucleotide substitutions, one six-base-pair insertion/deletion (indel) and one 30-base pair inversion, which distinguish two haplotypes of cpDNA. A PCR-based survey of the indel and the inversion revealed that the 93 accessions of velvetleaf collected from the world could be divided into two groups. A morphological marker (capsule color) could be used to discriminate the crop type and the weed type, and hence, along with cpDNA haplotype, to distinguish three genotypes (Type I, II, and III). All Japanese cultivars and crop accessions from other countries were Type I. Weed types were divided into Type II and III. All of the samples from the USA, and the samples taken from grain imports to Japan were Type III. Since most of the weedy types distributed in Japan were of Type III, it is argued that they were introduced as seeds in the imported grain. We also found that the Type II plants sporadically occurred in Japan. It is suggested that they originated as hybrids, with indigenous cultivars as the maternal ancestor. Such hybrids must have survived since the cessation of velvetleaf cultivation about a century ago.
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Affiliation(s)
- S Kurokawa
- National Institute of Livestock and Grassland Science, National Agricultural Research Organization, Tochigi 329-2793, Japan.
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Sato H, Hirose K, Terauchi R, Abe S, Moromizato I, Kurokawa S, Maehara N. Purification and Characterization of a novel Staphylococcus chromogenes Exfoliative Toxin. ACTA ACUST UNITED AC 2004; 51:116-22. [PMID: 15107037 DOI: 10.1111/j.1439-0450.2004.00743.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- H Sato
- Department of Veterinary Microbiology, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori 034-8628, Japan.
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Wang LF, Fukuma H, Kurokawa S, Oide K. Photoelectron trapping in quadrupole and sextupole magnetic fields. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:036502. [PMID: 12366272 DOI: 10.1103/physreve.66.036502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2002] [Indexed: 05/23/2023]
Abstract
A photoelectron-trapping phenomenon has been found in the simulation of the photoelectron cloud. It is found that the photoelectrons can be trapped in the quadrupole and sextupole magnetic fields for very long time until it longitudinally drifts out of the magnets, even a long bunch train separation is not sufficient to clear up the photoelectrons. Therefore, such a kind of long time trapped photoelectron cloud can cause coupled bunch instability. The trapping phenomenon is strongly beam dependent, especially on the bunch length. There is no such kind of trapping if the positron beam does not disturb the photoelectrons during the whole process. There is also no trapping for positron bunch with bunch length longer than the period of the photoelectron's gyration motion at the mirror points. The trapping is a mirror field trap which is caused by beam disturbance. The trapping phenomenon and mechanism will be presented in detail.
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Affiliation(s)
- L F Wang
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
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Kubota T, Jibiki I, Kurokawa S. Effects of risperidone, an atypical antipsychotic drug, on excitatory synaptic responses in the perforant path-dentate gyrus pathway in chronically prepared rabbits. Pharmacol Biochem Behav 2001; 70:237-42. [PMID: 11701193 DOI: 10.1016/s0091-3057(01)00609-8] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The effects of an atypical antipsychotic drug, risperidone, were examined on excitatory synaptic responses in the dentate gyrus by single electrical stimulations to the perforant path and the induction of long-term potentiation (LTP) in this pathway in chronically prepared rabbits. Any of 0.5, 1.0 and 2.0 mg/kg doses of risperidone intraperitoneally injected had virtually no effect on the excitatory synaptic responses. However, these three doses of risperidone dose-dependently suppressed the LTP induction.
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Affiliation(s)
- T Kubota
- Department of Neuropsychiatry, Kanazawa Medical University, 1-1, Daigaku, Uchinada-machi, Ishikawa-ken, Kahoku-gun 920-0293, Japan.
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Katsunuma E, Kurokawa S, Takahashi M, Fukuda N, Kurosawa T, Izumi T. Usefulness of BMIPP SPECT to evaluate myocardial viability, contractile reserve and coronary stenotic progression after reperfusion in acute myocardial infarction. Jpn Heart J 2001; 42:435-49. [PMID: 11693280 DOI: 10.1536/jhj.42.435] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Using combined 123I-BMIPP (BMIPP), 201Tl (Tl) and 99mTc-PYP (PYP) myocardial SPECT imaging, risk areas of acute myocardial infarction were documented in the acute stage, and then these images were evaluated for how well they reflected muscle viability, contractile reserve and coronary stenotic progression subsequent to reperfusion therapy. Patients who only experienced a first attack of myocardial infarction were enrolled. In total, 36 cases who had had the occluded artery successfully reperfused were examined during the past year. They had no significant vessel disease except for the culprit single artery. The patients were comprised of 32 men and 4 women. The mean age was 59.5 years. All patients underwent coronary angiography and left ventricular (LV) angiography in the emergency room. BMIPP/Tl and PYP myocardial SPECT were conducted in the acute stage and chronic stage. In the chronic stage LV angiography was repeated to assess the improvement of LV wall motion. The response to postextrasystolic potentiation (PESP) testing was performed to estimate myocardial contractile reserve. The risk area of acute myocardial infarction (AMI) was documented by reduced BMIPP accumulation. The size of reduced BMIPP accumulation was larger than that of PYP accumulation. A BMIPP/Tl discrepancy and PYP accumulation were documented to assess myocardial viability. Both improvement in LV wall motion and augmentation of PESP response were more closely related to a BMIPP/Tl discrepancy in the presence or absence of PYP accumulation. Therefore, it would be possible to evaluate myocardial viability and contractile reserve by the BMIPP/Tl discrepancy. In patients with good viability, it is important to predict whether there is coronary stenotic progression or not. In this study, we demonstrated that most patients with improved BMIPP images had no significant progression at the site of intervention. Serial observation of BMIPP images from the acute stage to the chronic stage might enable us to predict the progression of coronary stenosis.
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Affiliation(s)
- E Katsunuma
- Department of Internal Medicine and Cardiology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
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Kurokawa S, Morita T, Muraishi O, Tokue A. [Clinical evaluation of urinary nuclear matrix protein 22 as a marker for bladder cancer]. Hinyokika Kiyo 2001; 47:247-50. [PMID: 11411098] [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: 02/20/2023]
Abstract
The purpose of this study is to evaluate the clinical usefulness of urinary nuclear matrix protein 22 (NMP22) as a marker for bladder cancer. We examined the positive rates of NMP22 test, urinary cytology and bladder tumor antigen (BTA) test, and compared the positive rate of NMP22 test with that in urinary cytology and BTA test. Urine samples were obtained from 50 patients with histologically confirmed bladder cancer before the treatment. The samples were examined by NMP22 test, urinary cytology and BTA test. In 50 patients with bladder cancer, the overall positive rate was 40% for NMP22 test, 40% for urinary cytology, and 16% for BTA test. A combination of NMP22 test and urinary cytology showed a significantly higher positive rate (54%) as compared to NMP22 test or urinary cytology alone. When NMP22 test and urinary cytology were compared for tumor size, number, shape, stage and grade, NMP22 test showed a significant higher positive rate than urinary cytology in grade 1 bladder cancer. In conclusion, although NMP22 test and urinary cytology gave a similar positive rate, a combination of NMP22 test and urinary cytology is more useful than the NMP22 test or urinary cytology alone for monitoring of bladder cancer.
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Affiliation(s)
- S Kurokawa
- Department of Urology, Jichi Medical School
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Abstract
Behavior of fascicles and tendinous structures of human gastrocnemius medialis (MG) was determined by use of ultrasonography in vivo during jumping. Eight male subjects jumped vertically without countermovement (squat jump, SQJ). Simultaneously, kinematics, kinetics, and electromyography from lower leg muscles were recorded during SQJ. During phase I (-350 to -100 ms before toe-off), muscle-tendon complex (MTC) length was almost constant. Fascicles, however, shortened by 26%, and tendinous structures were stretched by 6%, storing elastic energy of 4.9 J during phase I. During phase II (-100 ms to toe-off), although fascicles generated force quasi-isometrically, MTC shortened rapidly by 5.3%, releasing prestored elastic energy with a higher peak positive power than that of fascicles. Also, the compliance of tendinous structures in vivo was somewhat higher than that of external tendon used in the simulation studies. The results demonstrate that the compliance of tendinous structures, together with no yielding of muscle fibers, allows MTC to effectively generate relatively large power at a high joint angular velocity region during the last part of push-off.
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Affiliation(s)
- S Kurokawa
- Department of Life Sciences (Sports Sciences), The University of Tokyo, Meguro, Tokyo 153-8902, Japan
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Abstract
We report a case of unilateral segmental multicystic dysplastic kidney (SMCDK) in an adult woman. A 42-year-old woman presented with abdominal distension and gross hematuria. The preoperative diagnosis was cystic renal cell carcinoma, and a radical nephrectomy was performed. Histopathologically, the resected kidney was SMCDK with severe hydronephrosis.
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Affiliation(s)
- K Suzuki
- Department of Urology, Jichi Medical School, Tochigi, Japan
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Nishiyama T, Ono Y, Kurokawa S, Kimura S. Trifluoromethanesulfonic anhydride-promoted alpha-bromination of ketones with grignard reagent or magnesium bromide. Chem Pharm Bull (Tokyo) 2000; 48:1999-2002. [PMID: 11145159 DOI: 10.1248/cpb.48.1999] [Citation(s) in RCA: 8] [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: 11/22/2022]
Abstract
The direct alpha-bromination of various ketones using trifluoromethanesulfonic anhydride and Grignard reagent or magnesium bromide in ether gave the corresponding alpha-bromo ketones in moderate to good yields under mild reaction conditions.
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Affiliation(s)
- T Nishiyama
- Department of Applied Chemistry, Faculty of Engineering & High Technology Research Center, Kansai University, Suita, Osaka, Japan.
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Kurokawa S, Yabe S, Takamura A, Ishizaki H, Aizawa S. Practical protective tools for occupational exposure: 1) double focus spectacles for the aged with highly refracted glass lens 2) remodeled barrier for radiation protection. Interv Neuroradiol 2000; 6 Suppl 1:33-42. [PMID: 20667219 PMCID: PMC3685933 DOI: 10.1177/15910199000060s103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2000] [Accepted: 09/30/2000] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Two practical protective tools for occupational exposure for neurointerventional radiologists are presented. The first purpose of this study was to investigate the effectiveness of double focus spectacles for the aged with a highly refracted glass lens (special spectacles for the aged) for radiation protection of the crystalline lens of the eye in comparison with other spectacles on the market, based on the measurement of film density which was obtained by exposure of X-ray through those spectacles. As a result of the film densitometry mentioned above, the effectiveness of special spectacles for the aged in radiation protection was nearly equal to the effectiveness of a goggle type shield which is made with a 0.07 mm lead-equivalent plastic lens. The second purpose of this study was to investigate the effectiveness of the protective barrier, which we remodeled for cerebral angiography or neuroendovascular therapy, for radiation exposure, based on the measurement in a simulated study with a head phantom, and on the measurement of radiation exposure in operaters during procedures of clinical cases. In the experimental study radiation exposure in supposed position of the crystalline lens was reduced to about one third and radiation exposure in supposed position of the gonadal glands was reduced to about one seventh, compared to radiation exposure without employing the barrier. The radiation exposure was monitored at the left breast of three radiologists, in 215 cases of cerebral angiography. Employing the barrier in cerebral angiography, average equivalent dose at the left breast measured 1.49mu Sv during 10 min of fluoroscopy. In three kinds of neuroendovascular therapy in 40 cases, radiation exposure in an operator was monitored in the same fashion and the dose was recorded less than the result reported in previous papers in which any protective barrier have not been employed in the procedure (1,2). As a result, the two above mentioned protective tools are considered practical in clinical usage and very effective to reduce radiation exposure in an operator of interventional neuroradiolgy which may sometimes require many hours to complete the therapy under extended fluoroscopic time. 1) The first topic of this report is double focus spectacles for the aged with a highly refracted glass lens (special spectacles for the aged).
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Affiliation(s)
- S Kurokawa
- Department of Radiolgy, Koshigaya Municipal Hospital; Higashi-koshigaya, Koshigaya City, Saitama, Japan -
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Kurokawa S, Tobita T, Taga K, Fukuda S, Shimoji K, Watanabe T, Tsuchida M, Yamato Y. [Anesthetic management with veno-venous extracorporeal membrane oxygenator (VV-ECMO) in a patient with severe tracheobronchial stenosis]. Masui 2000; 49:1242-6. [PMID: 11215233] [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: 02/19/2023]
Abstract
We conducted an anesthetic management to perform tracheostomy and tracheolysis in a 33 year-old female with severe stenosis extending to the lower trachea and right main bronchus. The minimal diameter of the stenotic lesion of the trachea was 3 mm according to the preoperative examinations including tomography, CT scan and magnetic resonance imaging. Since there was a high risk of airway collapse during anesthetic induction that could have made ventilation impossible, we decided to apply VV-ECMO to support gas-exchange prior to anesthetic induction. Blood gas analysis showed good results, and sufficient oxygenation and stable circulation were achieved during surgical procedures. Total intravenous anesthesia with propofol and fentanyl could provide adequate depth of anesthesia during surgery and rapid recovery with good spontaneous respiration after the termination of the infusion. VV-ECMO was a useful method to support gas-exchange in a case not requiring circulatory assistance without uneven oxygenation sometimes observed in VA-ECMO.
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Affiliation(s)
- S Kurokawa
- Department of Anesthesiology, School of Medicine, Niigata University, Niigata 951-8510
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46
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Hiraoka K, Nagata N, Kawajiri T, Suzuki K, Kurokawa S, Kido M, Sakamoto N. Paradoxical pleural response to antituberculous chemotherapy and isoniazid-induced lupus. Review and report of two cases. Respiration 2000; 65:152-5. [PMID: 9580929 DOI: 10.1159/000029251] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Among 28 inpatients receiving antituberculous chemotherapies including isoniazid (INH) and rifampicin, we found 2 patients with newly developing pleural effusion in the hemithorax during the initial phase of successful chemotherapy. The analysis of the effusion fluids revealed an elevated level of antinuclear antibody and a decreased level of total component, which are findings compatible with lupus pleuritis. The peripheral lymphocyte stimulation test using INH was positive in 1 patient. To the best of our knowledge, there has been no published discussion of the relationship between a paradoxical response to antituberculous treatment and INH-induced lupus.
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Affiliation(s)
- K Hiraoka
- Division of Respiratory Medicine, Chuba Rosai Hospital, Nagoya, Japan
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47
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Kurokawa S, Fukuda S, Shimoji K. [Anesthetic management of thrombectomy for left ventricular huge mobile thrombus]. Masui 2000; 49:634-8. [PMID: 10885242] [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: 02/17/2023]
Abstract
A 45 year-old male underwent thrombectomy for huge mobile thrombus and aneurysmectomy in the left ventricle. Despite of the patient's preoperative poor cardiac function and difficulties in weaning from cardiopulmonary bypass, he could recover with the aid of left ventricular bypass for 6 days without complications such as thromboembolism. Intraoperative transesophageal echocardiography was useful in observation of thrombus, decision making in the adaptation and type-selection of mechanical ventricular support, and evaluation of its efficacy.
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Affiliation(s)
- S Kurokawa
- Department of Anesthesiology, Niigata University, School of Medicine
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48
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Suzukawa K, Amoh M, Nakamura Y, Yasuma Y, Kurokawa S. [Spontaneous occlusion of a dissecting aneurysm in the shape of "two dumplings on a skewer" at righ posterior inferior cerebellar artery (PICA): report of a case and neuroradiological findings]. No Shinkei Geka 2000; 28:561-7. [PMID: 10875115] [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: 02/16/2023]
Abstract
We present a case of a spontaneous dissecting aneurysm at the vertebrobasilar artery including the right PICA in a 44-year-old man, who suffered from headache, hiccup and ataxic gait. The arteriograms showed an irregular narrowing and dilatation in the right PICA and in the vertebrobasilar artery, and showed fusiform dilatations in the bilateral middle cerebral arteries. We observed intramural hematoma and true lumen at the right PICA dissecting aneurysm on T1-weighted images on magnetic resonance imaging (1.5T, MRI), and the intimal flap was enhanced on T1-weighted image after intravenous injection of Gd-DTPA. The shape of the intramural hematoma showed a unique "two dumplings on a skewer" appearance, and the intensity of its hematoma in the false lumen decreased in gradient from adventitia to intimal flap on T1-weighted image on MRI. The dissecting aneurysm of the PICA was occluded spontaneously 1 month later, and it caused cerebellar infarction. However, the patient has been left only with the symptom of slight trunkal ataxia. Various shapes of intramural hematomas on MRI have been reported by Kitanaka in association with intracranial vertebrobasilar dissections. We suggest that "two dumplings on a skewer" shape which corresponds to the flow void of the true lumen, accompanied by intramural hematoma and enhanced intimal flap, on contrast-enhanced T1-weighted image, should be regarded as a true "diagnostic sign" of a dissecting aneurysm.
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Affiliation(s)
- K Suzukawa
- Department of Neurosurgery, Misato Junshin General Hospital, Saitama, Japan
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49
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Yamashita K, Arimura Y, Kurokawa S, Itoh F, Endo T, Hirata K, Imamura A, Kondo M, Sato T, Imai K. Microsatellite instability in patients with multiple primary cancers of the gastrointestinal tract. Gut 2000; 46:790-4. [PMID: 10807889 PMCID: PMC1756432 DOI: 10.1136/gut.46.6.790] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [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: 01/31/2023]
Abstract
BACKGROUND Little is known about the genetic alterations in multiple primary cancers of the gastrointestinal tract. Microsatellite instability (MSI) is frequently observed in hereditary non-polyposis colorectal cancer (HNPCC), and multiple primary cancers is a feature of this syndrome. AIMS To identify MSI incidence, target gene mutation, and mismatch repair (MMR) protein status in patients with multiple primary cancers of the gastrointestinal tract. SUBJECTS Fifty seven cancers from 22 Japanese patients with multiple primary cancers of the stomach, duodenum, colon, and rectum. METHODS MSI was examined at 5-7 microsatellite loci. Mutation analysis for TGFbetaRII, IGFIIR, and BAX was performed in cancers with MSI. MMR protein status was examined by immunohistochemical analysis using a monoclonal antibody against hMSH2 and hMLH1. RESULTS MSI was observed in 16 of 22 patients (73%) and in 29 of 57 lesions (51%). High frequency MSI (MSI-H) was found often in patients with multiple cancers in the same organ (p = 0.042), especially in multiple gastric cancer patients (p = 0.038). In contrast, patients with multiple cancers in different organs had a tendency to show low frequency MSI (MSI-L) or microsatellite stable (MSS) phenotype. Both target gene mutation and decreased expression of MMR protein were found only in seven lesions of three patients with MSI at more than four microsatellite loci. CONCLUSIONS These results suggest that genetic instability may play an important role in the development of multiple gastrointestinal cancers but there may be different genetic alterations between multiple gastrointestinal cancers of the same and different organs.
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Affiliation(s)
- K Yamashita
- First Department of Internal Medicine, Sapporo Medical University, Sapporo, Japan
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50
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Fukuda S, Kurokawa S, Kokubun S, Nishimaki H, Kinoshita H, Fujihara H, Kitahara Y, Shimoji K. Differences in brain oxygenation between two sequential cardiac arrests during axillobifemoral bypass in a Stanford type A dissecting aneurysm. J Cardiothorac Vasc Anesth 2000; 14:191-5. [PMID: 10794342 DOI: 10.1016/s1053-0770(00)90018-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- S Fukuda
- Department of Anaesthesia, Niigata University School of Medicine, Japan
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