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Namba K, Niimi Y, Ishiguro T, Higaki A, Toma N, Komiyama M. Cauda Equina and Filum Terminale Arteriovenous Fistulas: Anatomic and Radiographic Features. AJNR Am J Neuroradiol 2020; 41:2166-2170. [PMID: 33033040 DOI: 10.3174/ajnr.a6813] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 06/01/2020] [Indexed: 11/07/2022]
Abstract
Intradural AVF below the conus medullaris may develop either on the filum terminale or the cauda equina (lumbosacral and coccygeal radicular nerves). Although not a few filum terminale AVFs are found in the literature, only 3 detailed cauda equina AVFs have been reported. Here, we analyze the angiographic and MR imaging findings of our cauda equina and filum terminale AVF cases, supplemented with literature research to characterize the radiologic features of the 2 entities. On angiography, filum terminale AVFs were invariably supplied by the extension of the anterior spinal artery accompanied by a closely paralleling filum terminale vein. Cauda equina AVFs were fed by either a radicular or a spinal artery or both arteries, often with a characteristic wavy radicular-perimedullary draining vein. On thin-section axial MR imaging, the filum terminale AVF draining vein joined the spinal cord at the conus medullaris apex, but that of the cauda equina AVF joined above the conus medullaris apex.
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Affiliation(s)
- K Namba
- From the Center for Endovascular Therapy (K.N., A.H.), Division of Neuroendovascular Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Niimi
- Department of Neuroendovascular Therapy (Y.N.), St. Luke's International Hospital, Tokyo, Japan
| | - T Ishiguro
- Department of Neurointervention (T.I., M.K.), Osaka City General Hospital, Osaka, Japan
| | - A Higaki
- From the Center for Endovascular Therapy (K.N., A.H.), Division of Neuroendovascular Surgery, Jichi Medical University, Tochigi, Japan
| | - N Toma
- Department of Neurosurgery (N.T.), Mie University Graduate School of Medicine, Mie, Japan
| | - M Komiyama
- Department of Neurointervention (T.I., M.K.), Osaka City General Hospital, Osaka, Japan
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Miyazawa H, Fujita Y, Muramatsu K, Iwata H, Nomura T, Namba K, Hoshina D, Shimizu H. Refractory juvenile psoriatic uveitis without arthritis: a literature review. J Eur Acad Dermatol Venereol 2020; 34:e173-e175. [DOI: 10.1111/jdv.16127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Miyazawa
- Department of Dermatology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
| | - Y. Fujita
- Department of Dermatology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
| | - K. Muramatsu
- Department of Dermatology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
| | - H. Iwata
- Department of Dermatology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
| | - T. Nomura
- Department of Dermatology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
| | - K. Namba
- Department of Ophthalmology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
| | - D. Hoshina
- Department of Dermatology Hakodate Central General Hospital Hakodate Japan
| | - H. Shimizu
- Department of Dermatology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
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Araki K, Suzawa K, Miyauchi S, Miura A, Namba K, Otani S, Yamamoto H, Okazaki M, Sugimoto S, Yamane M, Toyooka S. EP1.01-18 Clinical Features of Locally Advanced Lung Cancer Patients with Radiation Pneumonitis After Induction Chemoradiotherapy. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1994] [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: 12/01/2022]
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Yamamoto H, Namba K, Yamamoto H, Toji T, Soh J, Shien K, Suzawa K, Kurosaki T, Ohtani S, Okazaki M, Sugimoto S, Yamane M, Takahashi K, Kunisada T, Oto T, Toyooka S. MA20.11 Surgical Treatment for Metastatic Lung Tumors from Sarcomas of Soft Tissue and Bone. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.672] [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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5
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Yamamoto H, Namba K, Yamamoto H, Soh J, Shien K, Kurosaki T, Ohtani S, Okazaki M, Sugimoto S, Yamane M, Oto T, Toyooka S. P1.14-30 Prognostic Factors for Sarcoma Patients with Lung Metastasis Who Underwent Extended Pulmonary Resection. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.932] [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: 11/17/2022]
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Yamamoto H, Namba K, Takahashi K, Soh J, Shien K, Kurosaki T, Ohtani S, Okazaki M, Sugimoto S, Yamane M, Oto T, Toyooka S. P1.14-29 Surgical Treatment for Metastatic Lung Tumors from Various Sarcomas. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.931] [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: 11/30/2022]
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Watanabe R, Namba K, Takeda K, Yamamoto K, Katsuragawa S, Doi K, Nakayama R. An Improved Computer-aided Diagnosis Scheme Using the Nearest Neighbor Criterion for Determining Histological Classification of Clustered Microcalcifications. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1625433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Summary
Objectives
: Our purpose was to evaluate the potential usefulness of the nearest neighbor case which was assumed to be the similar case in a CAD scheme for determining the histological classification of clustered microcalcifications.
Methods
: Our database consisted of current and previous magnification mammograms obtained from 93 patients before and after three-month follow-up examination. It included 11 invasive carcinomas, 19 noninvasive carcinomas of the comedo type, 25 noninvasive carcinomas of the noncomedo type, 23 mas- topathies, and 15 fibroadenomas. Six objective features on clustered microcalcifications were first extracted from each of the current and the previous images. The nearest neighbor case was then identified by the Euclidean distance in the previous and current feature-space. The histological classification of an unknown new case in question was assumed to be thesame as that of the nearest neighbor case which has the shortest Euclidean distance in our database.
Results
: The classification accuracies were 90.9% for invasive carcinoma, 89.5% for noninvasive carcinoma of the comedo type, 96.0% for noninvasive carcinoma of the noncomedo type, 82.6% for mastopathy, and 93.3% for fibroadenoma. These results were substantially higher than those with our previous CAD scheme.
Conclusion
: The nearest neighbor criterion was useful in a CAD scheme for determining the histological classification.
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Brézin A, Dick A, Jaffe G, Ohno S, Namba K, Goto H, Inomata N, Song A, Kron M, Camez A, Tari S, Nguyen Q. THU0561 Adalimumab in Patients with Active and Inactive, Non-Infectious Uveitis: Visual I and Visual II Trials. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1738] [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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Satoh T, Izumi H, Iwabuchi N, Odamaki T, Namba K, Abe F, Xiao JZ. Bifidobacterium breve prevents necrotising enterocolitis by suppressing inflammatory responses in a preterm rat model. Benef Microbes 2015; 7:75-82. [PMID: 26420070 DOI: 10.3920/bm2015.0035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [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: 12/13/2022]
Abstract
Necrotising enterocolitis (NEC) is associated with inflammatory responses and barrier dysfunction in the gut. In this study, we investigated the effect of Bifidobacterium breve M-16V on factors related to NEC development using an experimental rat model. Caesarean-sectioned rats were given formula milk with or without B. breve M-16V by oral gavage thrice daily, and experimental NEC was induced by exposing the rats to hypoxic conditions. Naturally delivered rats that were reared by their mother were used as healthy controls. The pathological score of NEC and the expression of molecules related to inflammatory responses and the barrier function were assessed in the ileum. B. breve M-16V reduced the pathological scores of NEC and resulted in some improvement in survivability. B. breve M-16V suppressed the increased expression of molecules related to inflammation and barrier function that resulted from NEC induction. B. breve M-16V normalised Toll-like receptor (TRL)4 expression and enhanced TLR2 expression. Our data suggest that B. breve M-16V prevents NEC development by modulating TLR expressions and suppressing inflammatory responses in a rat model.
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Affiliation(s)
- T Satoh
- 1 Food Science and Technology Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
| | - H Izumi
- 2 Nutritional Science Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
| | - N Iwabuchi
- 1 Food Science and Technology Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
| | - T Odamaki
- 1 Food Science and Technology Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
| | - K Namba
- 2 Nutritional Science Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
| | - F Abe
- 1 Food Science and Technology Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
| | - J Z Xiao
- 1 Food Science and Technology Institute, Morinaga Milk Industry Co., Ltd., 1-83, 5-Chome, Higashihara, Zama-City, 2528583 Kanagawa, Japan
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Fujiwara T, Tanaka S, Okada K, Namba K, Yamamoto H, Teruta S, Matsuda H. Impact of recipient aging on kidney allograft in living donor transplantation. Transplant Proc 2014; 46:454-6. [PMID: 24655986 DOI: 10.1016/j.transproceed.2013.10.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 10/02/2013] [Indexed: 11/24/2022]
Abstract
BACKGROUND The aging of recipients is becoming increasingly important in organ transplantation. PATIENTS AND METHODS We analyzed outcomes in 215 consecutive adult kidney transplant recipients from living donors who underwent transplantation at our center between November 1988 and March 2012. The list of recipients was divided by age at transplantation into those aged 16 to 29 years (n = 61), 30 to 39 years (n = 69), 40 to 49 years (n = 33), 50 to 59 years (n = 29), and those 60 years or older (elderly group, n = 23). Cox proportional hazards analysis was used to calculate the relative risk (RR) of patient death and graft failure, with recipient age included as a continuous variable. RESULTS Univariate analysis showed that recipient age did not significantly affect the risk of graft failure, either uncensored (RR = 1.01, P = .312) or censored for death (RR = 0.993, P = .587). Multivariate analysis, however, showed that recipient age was an independent risk factor for patient death (RR = 1.053, P = .024). The patient survival rate was the poorest in elderly group (87.0%, P = .036), whereas the both death uncensored and censored graft survival rates of this group were 78.1% and 91.3%, respectively, comparable to those of other age groups (P = .567 and P = .696). Mean estimated glomerular filtration rate (eGFR) 1 year after transplantation was lower in elderly groups than in other groups (46.1 ± 13.0 mL/min/1.73 m(2), P = .014). However, mean δeGFR, defined as the difference between pretransplantation eGFR of the donor and eGFR of the recipient 1 year post-transplantation, did not differ significantly among age groups. CONCLUSION Recipient age did not affect allograft deterioration in living donor kidney transplantation, although it was an independent risk factor of recipient death.
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Affiliation(s)
- T Fujiwara
- Department of Surgery, National Hospital Organization Okayama Medical Center.), Okayama, Japan.
| | - S Tanaka
- Department of Surgery, National Hospital Organization Okayama Medical Center.), Okayama, Japan
| | - K Okada
- Department of Surgery, National Hospital Organization Okayama Medical Center.), Okayama, Japan
| | - K Namba
- Department of Surgery, National Hospital Organization Okayama Medical Center.), Okayama, Japan
| | - H Yamamoto
- Department of Surgery, National Hospital Organization Okayama Medical Center.), Okayama, Japan
| | - S Teruta
- Department of Surgery, National Hospital Organization Okayama Medical Center.), Okayama, Japan
| | - H Matsuda
- Department of Surgery, Saiwaicho Memorial Hospital, Okayama, Japan
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Affiliation(s)
- K Namba
- Center for Endovascular Treatment, Division of Neuroendovascular SurgeryJichi Medical UniversityTochigi-ken, Japan
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Abstract
The anatomy of the double ophthalmic artery was visualized using fused imaging. The images demonstrate the first angiographic visualization of the course of the vessel.
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Affiliation(s)
- K Namba
- Division of Neuroendovascular Surgery, Center for Endovascular Treatment, Jichi Medical University; Tochigi, Japan -
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Namba K, Mashio K, Kawamura Y, Higaki A, Nemoto S. Swine hybrid aneurysm model for endovascular surgery training. Interv Neuroradiol 2013; 19:153-8. [PMID: 23693037 DOI: 10.1177/159101991301900202] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Accepted: 01/17/2013] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to develop a technically simple swine aneurysm-training model by inserting a silicone aneurysm circuit in the cervical vessels. A silicone aneurysm circuit was created by designing multiple aneurysms in size and configuration on a silicone vessel. Five swine underwent surgical implantation of this circuit in the cervical vessels: one end in the common carotid artery and the other in the external jugular vein. Using this model, an aneurysm coiling procedure was simulated under fluoroscopic guidance, roadmapping and digital subtraction angiography. Creating an aneurysm model for training purposes by this method was technically simple and enabled the formation of a wide variety of aneurysms in a single procedure. The quality of the model was uniform and the model was reproducible. Coiling training using this model resembled a realistic clinical situation. The swine hybrid aneurysm-training model was advantageous from the standpoint of technical simplicity in the creation and variety of aneurysms it provided. The swine hybrid aneurysm model may be an additional option for aneurysm coiling training.
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Affiliation(s)
- K Namba
- Department of Endovascular Surgery, Jichi Medical University; Tochigi, Japan.
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Gayathri P, Fujii T, Møller-Jensen J, van den Ent F, Namba K, Löwe J. A bipolar spindle of antiparallel ParM filaments drives bacterial plasmid segregation. Science 2012; 338:1334-7. [PMID: 23112295 DOI: 10.1126/science.1229091] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
To ensure their stable inheritance by daughter cells during cell division, bacterial low-copy-number plasmids make simple DNA segregating machines that use an elongating protein filament between sister plasmids. In the ParMRC system of the Escherichia coli R1 plasmid, ParM, an actinlike protein, forms the spindle between ParRC complexes on sister plasmids. By using a combination of structural work and total internal reflection fluorescence microscopy, we show that ParRC bound and could accelerate growth at only one end of polar ParM filaments, mechanistically resembling eukaryotic formins. The architecture of ParM filaments enabled two ParRC-bound filaments to associate in an antiparallel orientation, forming a bipolar spindle. The spindle elongated as a bundle of at least two antiparallel filaments, thereby pushing two plasmid clusters toward the poles.
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Affiliation(s)
- P Gayathri
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
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Namba K, Shojima M, Nemoto S. Wire-probing technique to revascularize subacute or chronic internal carotid artery occlusion. Interv Neuroradiol 2012; 18:288-96. [PMID: 22958767 DOI: 10.1177/159101991201800307] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Accepted: 02/26/2012] [Indexed: 11/16/2022] Open
Abstract
During endovascular revascularization of subacute and chronic occlusion of the cervical internal carotid artery (ICA) it may be difficult to penetrate the lesion. Selecting the appropriate "true lumen", a remnant of what had been the arterial lumen, at the initial step may facilitate the procedure. Because plaque at the carotid bifurcation is known to propagate from the posterior wall, a gateway to this "true lumen" should exist in the anterior side of the occluded stump. This hypothesis was studied retrospectively in our series of revascularizing ICA subacute and chronic occlusion. Eleven patients underwent endovascular revascularization for symptomatic cervical ICA occlusion. Procedures were performed by initially penetrating the occluded stump with a guidewire, followed by supporting catheter advancement through the occluded segment to secure the distal normal arterial lumen. Cases were analyzed with regard to the location of initial guidewire penetration. Eight patients underwent successful revascularization. In five cases, the entry point to the occluded stump was located at the anterior side, and in three, at the posterior side. Two posterior stump penetration cases were met with resistance in guidewire advancement, whereas penetration was smooth in the anterior cases. In addition, two posterior stump penetration cases resulted in contrast stasis in the posterior ICA wall. In our series of revascularizing cervical ICA subacute and chronic occlusion, initially targeting the anterior side of the occluded stump resulted in favorable results. This may be the result of selecting the "true lumen" at the beginning of the procedure.
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Affiliation(s)
- K Namba
- Department of Endovascular Surgery, Jichi Medical University; Tochigi, Japan.
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Matsunaga T, Mutai H, Kunishima S, Namba K, Morimoto N, Shinjo Y, Arimoto Y, Kataoka Y, Shintani T, Morita N, Sugiuchi T, Masuda S, Nakano A, Taiji H, Kaga K. A prevalent founder mutation and genotype-phenotype correlations ofOTOFin Japanese patients with auditory neuropathy. Clin Genet 2012; 82:425-32. [DOI: 10.1111/j.1399-0004.2012.01897.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shojima M, Nemoto S, Morita A, Miyata T, Namba K, Tanaka Y, Watanabe E. Protected endovascular revascularization of subacute and chronic total occlusion of the internal carotid artery. AJNR Am J Neuroradiol 2010; 31:481-6. [PMID: 19850764 DOI: 10.3174/ajnr.a1843] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The natural course of symptomatic carotid artery occlusion with hemodynamic impairment is poor. Surgical revascularization may improve the outcome; however, its efficacy has not been established yet. The goal of this study was to characterize the technical and clinical outcomes following endovascular recanalization of the ICA under cerebral circulatory protection. MATERIALS AND METHODS Endovascular recanalization was attempted in 8 patients with symptomatic ICA occlusions. The duration of the occlusion ranged from 7 days to 7 months (mean, 2.5 months), and the mean length of the occlusion was 95 mm. Cerebral hemodynamics ipsilateral to the side of the occlusion were severely impaired in all patients. The endovascular procedure was performed under total cerebral circulatory protection, beginning with proximal protection with a subsequent switch to distal protection after successful guidewire passage. RESULTS The occlusion was recanalized successfully in 7 of 8 patients (88%), resulting in improvement of ipsilateral cerebral hemodynamics without symptomatic stroke. Small asymptomatic ischemic lesions were detected in 6 of 8 patients (75%) on DWI, and 1 patient developed a mild groin hematoma. Ischemic episodes did not recur during the mean follow-up period of 19 months. However, 1 patient experienced asymptomatic reocclusion, which was re-treated successfully without complications, while another patient developed mild retinal hemorrhage at 3 months after the procedure due to the combination of antiplatelet and anticoagulant therapy. CONCLUSIONS Endovascular revascularization of an ICA occlusion is feasible and well-tolerated in patients with subacute or chronic total occlusion of the ICA.
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Affiliation(s)
- M Shojima
- Department of Endovascular Neurosurgery, Jichi Medical University, Tochigi, Japan.
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Tsuiki S, Kobayashi M, Namba K, Oka Y, Komada Y, Kagimura T, Inoue Y. Optimal positive airway pressure predicts oral appliance response to sleep apnoea. Eur Respir J 2009; 35:1098-105. [PMID: 19840960 DOI: 10.1183/09031936.00121608] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Patients with less severe obstructive sleep apnoea (OSA) are usually prescribed oral appliances and/or smaller optimal nasal continuous positive airway pressure (P(nCPAP)) in nCPAP therapy. We hypothesised that OSA patients with greater P(nCPAP) would not respond favourably to oral appliances. Oral appliances were inserted in nCPAP users after washing-out the nCPAP effect. Follow-up polysomnography was undertaken with the adjusted oral appliance in place. The predictability of P(nCPAP) was evaluated with receiver-operating characteristic (ROC) curves. The median baseline apnoea/hypopnoea index (AHI) was reduced with the oral appliance from 36 to 12 events.h(-1) in 35 patients. When responders were defined as patients showing a follow-up AHI of <5 events.h(-1) with >50% reduction in baseline AHI, the area under the ROC curve for P(nCPAP) was 0.76. The best cut-off value of P(nCPAP) turned out to be 10.5 cmH(2)O with a high negative predictive value (0.93) and a low negative likelihood ratio (0.18). OSA patients with a P(nCPAP) of >10.5 cmH( 2)O are unlikely to respond to oral appliance therapy. This prediction is clinically helpful to both OSA patients and medical personnel in discussing oral appliances as a temporary substitute and/or alternative for nCPAP.
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Affiliation(s)
- S Tsuiki
- Division of Dental Sleep Medicine, Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan.
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Horie Y, Meguro A, Ota M, Kitaichi N, Katsuyama Y, Takemoto Y, Namba K, Yoshida K, Song YW, Park KS, Lee EB, Inoko H, Mizuki N, Ohno S. Association of TLR4 polymorphisms with Behcet's disease in a Korean population. Rheumatology (Oxford) 2009; 48:638-42. [DOI: 10.1093/rheumatology/kep077] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Namba K, Niimi Y, Song JK, Berenstein A. Use of Dyna-CT Angiography in Neuroendovascular Decision-Making. A Case Report. Interv Neuroradiol 2009; 15:67-72. [PMID: 20465931 DOI: 10.1177/159101990901500110] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2008] [Accepted: 09/21/2008] [Indexed: 11/15/2022] Open
Abstract
SUMMARY A successful neuroendovascular procedure depends on accurate anatomical understanding of a target vessel in relation to surrounding anatomical structures or endovascular devices, such as coils and stents. During an endovascular procedure, with conventional or three dimensional (3D) rotational angiography, this type of information is extremely difficult to obtain in a timely manner. To overcome this drawback, a DynaCT was combined with low dose contrast injection to create CT angiography (CTA)-like images (DynaCTA). The images obtained were similar to those of conventional CTA but with better quality in analyzing vessels to surrounding anatomical structures and endovascular devices while the patient was on the table. The authors present three illustrative cases in which information added by the DynaCTA helped improve understanding of anatomy, and affected our clinical decision-making. Although better quality images may be obtained by other imaging modalities or careful angiographic interpretations, DynaCTA can be an easy and effective rescue technique worth keeping in mind in clarifying the relation of a vessel to surrounding anatomy.
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Affiliation(s)
- K Namba
- Jichi Medical University; Shimotsuke, Tochigi, Japan -
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Takemoto Y, Naruse T, Namba K, Kitaichi N, Ota M, Shindo Y, Mizuki N, Gul A, Madanat W, Chams H, Davatchi F, Inoko H, Ohno S, Kimura A. Re-evaluation of heterogeneity in HLA-B*510101 associated with Behçet’s disease. ACTA ACUST UNITED AC 2008; 72:347-53. [DOI: 10.1111/j.1399-0039.2008.01111.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kikuchi Y, Matsunami H, Yamane M, Imada K, Namba K. Crystal structure of the muramidase domain of FlgJ, a putative flagellar rod cap protein. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308091757] [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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Matsunami H, Samatey F, Nagashima S, Imada K, Namba K. X-ray structural studies of SalmonellaFlgA, a periplasmic chaperone for flagellar P-ring assembly. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308089228] [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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Namba K. Molecular mechanisms of self-assembly and motion of the bacterial flagellum. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730809569x] [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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Akahoshi M, Ishihara M, Namba K, Kitaichi N, Ando Y, Takenaka S, Ishida T, Ohno S, Mizuki N, Nakashima H, Shirakawa T. Mutation screening of the CARD15 gene in sarcoidosis. ACTA ACUST UNITED AC 2008; 71:564-7. [PMID: 18384487 DOI: 10.1111/j.1399-0039.2008.01043.x] [Citation(s) in RCA: 19] [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: 01/02/2023]
Abstract
CARD15 was first identified as a susceptibility gene for Crohn's disease. More recently, CARD15 mutations were shown to be associated with the pediatric granulomatous inflammatory diseases, Blau syndrome and early-onset sarcoidosis (EOS). The aim of the present study was to evaluate whether CARD15 variants also play a role in patients with ordinary sarcoidosis other than EOS. We enrolled 135 Japanese sarcoidosis patients with uveitis as well as 95 healthy individuals and performed mutation analysis by direct sequencing of CARD15 exon 4. Direct DNA sequencing in the sarcoidosis patients showed eight CARD15 variants, including five novel mutations (13402C>T, 13543C>T, 13775C>A, 13937G>A, and 14079C>T). Compared with healthy individuals, CARD15 mutations are not common in the Japanese patients with sarcoidosis. Based on the results, we examined the clinical manifestations in patients with sarcoidosis according to their CARD15 mutations. Sarcoidosis patients with these mutations have no specific clinical features with regard to course of the disease or disease severity. Our results indicate that in general, CARD15 mutations may not contribute to the risk of sarcoidosis.
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Affiliation(s)
- M Akahoshi
- The Institute of Physical and Chemical Research , Yokohama, Japan.
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Namba K, Song JK, Niimi Y, Heran NS, Berenstein A. A new hemostasis valve for neuroendovascular procedures. Interv Neuroradiol 2007; 13:51-3. [PMID: 20566129 DOI: 10.1177/159101990701300106] [Citation(s) in RCA: 4] [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] [Received: 02/08/2007] [Accepted: 02/15/2007] [Indexed: 11/15/2022] Open
Abstract
SUMMARY A hemostasis valve is routinely used in neuroendovascular procedures to decrease the risk of thromboembolism (1,2) . Recently, a new hemostasis valve that is designed to minimize blood loss has been introduced. We report our initial experience in using this new hemostasis valve. In neuroendovascular procedures, a hemostasis valve is commonly used for continuous irrigation of guide and microcatheters to decrease the risk of thromboembolism(1,2,3). A conventional hemostasis valve has a rotating seal at the end, which is turned open or closed each time a wire or microcatheter/guidewire is introduced or extracted. Often this results in significant back bleeding. When a rotating seal is adjusted suboptimally during a wire or microcatheter manipulation, leakage of pressurized saline from the end of a hemostasis valve results in stagnation of blood within a guiding catheter, which becomes a potential source of emboli during a procedure. The Guardian Haemostasis Valve (Zerusa Limited, Galway, Ireland) is a new hemostasis valve that is designed to minimize blood loss during interventional procedures by minimizing the opening time of the valve during wire or microcatheter insertion. A continuous sealing mechanism during wire or microcatheter positioning minimizes blood loss and stagnation of blood within the guide catheter. We report our initial experience with the Guardian hemostasis valve.
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Affiliation(s)
- K Namba
- Center for Endovascular Surgery, Beth Israel Hyman-Newman Institute for Neurology and Neurosurgery Roosevelt Hospital, New York, NY -
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Nakayama R, Watanabe R, Namba K, Takeda K, Yamamoto K, Katsuragawa S, Doi K. An improved computer-aided diagnosis scheme using the nearest neighbor criterion for determining histological classification of clustered microcalcifications. Methods Inf Med 2007; 46:716-722. [PMID: 18066424] [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: 05/25/2023]
Abstract
OBJECTIVES Our purpose was to evaluate the potential usefulness of the nearest neighbor case which was assumed to be the similar case in a CAD scheme for determining the histological classification of clustered microcalcifications. METHODS Our database consisted of current and previous magnification mammograms obtained from 93 patients before and after three-month follow-up examination. It included 11 invasive carcinomas, 19 noninvasive carcinomas of the comedo type, 25 non-invasive carcinomas of the noncomedo type, 23 mastopathies, and 15 fibroadenomas. Six objective features on clustered microcalcifications were first extracted from each of the current and the previous images. The nearest neighbor case was then identified by the Euclidean distance in the previous and current feature-space. The histological classification of an unknown new case in question was assumed to be the same as that of the nearest neighbor case which has the shortest Euclidean distance in our database. RESULTS The classification accuracies were 90.9% for invasive carcinoma, 89.5% for noninvasive carcinoma of the comedo type, 96.0% for noninvasive carcinoma of the noncomedo type, 82.6% for mastopathy, and 93.3% for fibroadenoma. These results were substantially higher than those with our previous CAD scheme. CONCLUSION The nearest neighbor criterion was useful in a CAD scheme for determining the histological classification.
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Affiliation(s)
- R Nakayama
- Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, 514-8507, Japan.
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Berenstein A, Song JK, Niimi Y, Namba K, Heran NS, Brisman JL, Nahoum MC, Madrid M, Langer DJ, Kupersmith MJ. Treatment of cerebral aneurysms with hydrogel-coated platinum coils (HydroCoil): early single-center experience. AJNR Am J Neuroradiol 2006; 27:1834-40. [PMID: 17032853 PMCID: PMC7977872] [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: 05/12/2023]
Abstract
PURPOSE The authors report their experience using HydroCoils in the treatment of cerebral aneurysms. METHODS We performed a retrospective review of the first 100 nonrandomized patients (104 coiled saccular cerebral aneurysms) treated with HydroCoils during a 27-month period. RESULTS The average percentage of HydroCoil by length detached in treated aneurysms was 45.5% (range, 9.9-100%). Immediate postprocedure angiography demonstrated complete aneurysm occlusion in 34%, neck remnant in 35%, and incomplete occlusion in 32%. Immediate procedure-related morbidity and mortality rates were 5.8% and 0%, respectively. Angiographic follow-up was obtained in 51% (51/100 patients; 53/104 aneurysms; average, 10.3 months; range, 0-31 months). In these 53 angiographically followed aneurysms, the overall recanalization rate was 21%: no recanalization occurred in 23 aneurysms with small size (<10 mm)/small neck (<4 mm) (S/S); 4 recanalizations occurred in 7 aneurysms with small size/wide neck (>4 mm) (S/W); 6 recanalizations (27%) occurred in 22 large (L) aneurysms (>10-25 mm, 70% angiographic follow-up); and 1 giant (G) (>25 mm) aneurysm recanalized. A large proportion of aneurysms that were not initially completely occluded were completely occluded on follow-up (15/43 [35%]). Clinical follow-up was obtained in 73 patients (73%; average, 5.3 months; range, 0-24 months): 93% of these patients were neurologically improved or unchanged. Three patients rehemorrhaged and 3 patients with unruptured aneurysms developed delayed hydrocephalus. CONCLUSIONS The overall safety profile of HydroCoils appears acceptable. Preliminary midterm observations suggest less coil compaction/aneurysm recanalization in large aneurysms. However, HydroCoil-related delayed hydrocephalus is a concern.
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Affiliation(s)
- A Berenstein
- Center for Endovascular Surgery, Beth Israel Hyman-Newman Institute for Neurology and Neurosurgery, New York, NY 10019, USA.
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Kase S, Namba K, Kitaichi N, Ohno S. Epstein-Barr virus infected cells in the aqueous humour originated from nasal NK/T cell lymphoma. Br J Ophthalmol 2006; 90:244-5. [PMID: 16424544 PMCID: PMC1860178 DOI: 10.1136/bjo.2005.081885] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Heran NS, Song JK, Namba K, Smith W, Niimi Y, Berenstein A. The utility of DynaCT in neuroendovascular procedures. AJNR Am J Neuroradiol 2006; 27:330-2. [PMID: 16484404 PMCID: PMC8148775] [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: 05/06/2023]
Abstract
The authors present 3 patients who underwent neuroendovascular procedures in which DynaCT produced by a flat-panel detector facilitated management of complications. As part of a combined CT/angiography suite, DynaCT offered the major advantage of immediate detection or exclusion of intracranial complication without patient transfer. The quality of cone-volume CT-generated images produced by DynaCT was sufficient to make a diagnosis.
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MESH Headings
- Adult
- Aneurysm, Ruptured/diagnostic imaging
- Aneurysm, Ruptured/therapy
- Carotid Artery, Internal, Dissection/diagnostic imaging
- Carotid Artery, Internal, Dissection/therapy
- Cerebral Angiography/instrumentation
- Diagnosis, Differential
- Embolization, Therapeutic/instrumentation
- Emergencies
- Equipment Design
- Fatal Outcome
- Hematoma, Subdural/diagnostic imaging
- Hematoma, Subdural/therapy
- Humans
- Image Enhancement/instrumentation
- Image Processing, Computer-Assisted/instrumentation
- Intracranial Aneurysm/diagnostic imaging
- Intracranial Aneurysm/therapy
- Male
- Middle Aged
- Recurrence
- Retreatment
- Subarachnoid Hemorrhage/diagnostic imaging
- Subarachnoid Hemorrhage/therapy
- Tomography, X-Ray Computed/instrumentation
- Treatment Outcome
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Affiliation(s)
- N S Heran
- Center for Endovascular Surgery, Beth Israel Hyman-Newman Institute for Neurology and Neurosurgery, Roosevelt Hospital, Continuum Health Care Partners, New York, NY 10019, USA
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Iwaki S, Okada T, Eguchi N, Tanaka S, Namba K, Oiwa N. Imperfections in friction stir welded zones and their precision non-destructive testing. Studies on characteristics of friction stir welded joints in structural thin aluminium alloys. ACTA ACUST UNITED AC 2006. [DOI: 10.1533/wint.2006.3573] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kitamura M, Kitaichi N, Takeuchi M, Kitamei H, Namba K, Yamagishi SI, Iwabuchi K, Onoé K, Ohno S. Decrease in the glyceraldehyde derived advanced glycation end products in the sera of patients with Vogt-Koyanagi-Harada disease. Br J Ophthalmol 2005; 89:1407-9. [PMID: 16234440 PMCID: PMC1772931 DOI: 10.1136/bjo.2005.072678] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND/AIMS Advanced glycation end products (AGEs) are considered to act as mediators of both age related pathologies and diabetic complications. It was recently reported that glyceraldehyde derived AGE (AGE-2) has a strong biological effect on various diseases. The aim of this study was to investigate the serum AGE-2 levels in Vogt-Koyanagi-Harada (VKH) disease. METHODS Sera were obtained from 31 patients with active VKH. 20 of these 31 patients were treated with systemic corticosteroids. As controls, 33 healthy volunteers were also examined. The serum AGE-2 levels were determined with a competitive enzyme linked immunosorbent assay using AGE-2 polyclonal antibody. RESULTS The mean AGE-2 level in the sera of patients with VKH disease was 4.91 (SD 2.23) U/ml, which was significantly lower than that of the healthy control subjects (8.32 (2.94), p<0.001). The average serum AGE-2 level significantly increased to 13.49 (2.17) U/ml after the patients were treated with systemic corticosteroids (p<0.001). CONCLUSIONS These results suggest that AGE-2 may be involved in the onset of VKH disease.
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Affiliation(s)
- M Kitamura
- Department of Ophthalmology and Visual Sciences, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
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Matsunami H, Samatey FA, Imada K, Nagashima S, Namba K. Crystallization and X-ray analysis of a flagellar hook capping protein. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305089786] [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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Samatey FA, Matsunami H, Imada K, Nagashima S, Shaikh TR, Thomas D, DeRosier DJ, Namba K. Twist and curvature formation of the hook: a two-domain movement. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304096904] [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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Shaikh T, Thomas D, Samatey F, Matsunami H, Imada K, Namba K, DeRosier D. 1369.1-Pos Board # B623.1 – The Bacterial Flagellar Hook Structure. Biophys J 2003. [DOI: 10.1016/s0006-3495(03)70117-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Dhople AM, Namba K. Activities of sitafloxacin (DU-6859a), either singly or in combination with rifampin, against Mycobacterium ulcerans infection in mice. J Chemother 2003; 15:47-52. [PMID: 12678414 DOI: 10.1179/joc.2003.15.1.47] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 10/31/2022]
Abstract
Efficacy of a new fluoroquinolone, sitafloxacin (DU-6859a), against Mycobacterium ulcerans was evaluated in vivo using the mouse footpad system. The growth of M. ulcerans in mouse footpads was completely inhibited when mice were fed with sitafloxacin at a dose of 25 mg/kg body weight per day; on the other hand similar effects were observed with ofloxacin at a dose of 100 mg/kg body weight per day. In the presence of rifampin, the above dose of sitafloxacin could be reduced by 75% to achieve total inhibition, while, under similar circumstances, the dose of ofloxacin could be reduced by only 50%. Either used singly or in combination with rifampin, the effects of sitafloxacin were bactericidal. The results suggest that sitafloxacin should be evaluated as a chemotherapeutic agent against M. ulcerans infection.
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Affiliation(s)
- A M Dhople
- Infectious Diseases Laboratory, Dept of Biological Sciences, Florida Institute of Technology, Melbourne, Florida 32901-6975, USA.
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Imada K, Matsunami H, Yamane M, Samatey F, Nagashima S, Namba K. Crystal structure of HAP3, a flagellar hook-filament junction protein and a junction model. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302096411] [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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Samatey FA, Matsunami H, Imada K, Nagashima S, Namba K. Atomic structure of a core fragment of hook protein, FlgE. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302096459] [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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Namba K. Structural mechanisms of self-assembly and polymorphic supercoiling of the bacterial flagellum. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302085203] [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: 04/03/2023] Open
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Hasegawa K, Imada K, Maki-Yonekura S, Yonekura K, Samatey F, Yamashita I, Namba K. Possible packing of terminal α-helices in the inner-core of the bacterial flagellar filament. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302091584] [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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Namba K, Nishio M, Mori K, Miyamoto N, Tsurudome M, Ito M, Kawano M, Uchida A, Ito Y. Involvement of ADAM9 in multinucleated giant cell formation of blood monocytes. Cell Immunol 2001; 213:104-13. [PMID: 11831872 DOI: 10.1006/cimm.2001.1873] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [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: 11/22/2022]
Abstract
Monocytes-macrophages are converted to multinucleated giant cells by stimulation with various cytokines, and osteoclasts are the multinucleated giant cells derived from a monocyte-macrophage lineage. However, at present, the fusion peptides have not been clearly identified in monocytes-macrophages. The ADAM are a family of transmembrane glycoproteins that have a role in various biological functions. Interestingly, fertilin-alpha, ADAM9, and ADAM11 have potential fusion peptides. In this study, which ADAM was specifically expressed in monocytes stimulated with anti-CD98 antibody or RANKL and which factor(s) was functioning in monocytes as a fusion protein were investigated. ADAM1, 8, 10, 12, 15, 17, 20, and 21 mRNAs are expressed in blood monocytes incubated with control antibody, anti-FRP-1/CD98 antibody, or RANKL + M-CSF, while ADAM2, 7, 11, 13, 19, 23, 29, and 30 mRNAs could not be detected in these blood monocytes. Expression of ADAM9 and ADAM10 mRNAs are enhanced by either RANKL + M-CSF or anti-CD98 antibody. The expression of ADAM9 and ADAM10 is also induced in blood monocytes by anti-CD98 mAb. An anti-ADAM9 antibody enhances CD98-mediated cell aggregation, while it blocks CD98-mediated and RANKL-mediated multinucleated giant cell formation. A hydroxamate-based metalloprotease inhibitor, SI-27, which is found to suppress ADAM9 activity, suppresses multinucleated giant cell formation. New protein synthesis is necessary for the expression of ADAM9 mRNA and genistein suppresses induction of ADAM9 mRNA. This is the first report that ADAM9 is involved in monocyte fusion, such as CD98-mediated and RANKL-mediated cell fusion of blood monocytes. Furthermore, AMAM9 is one candidate for a fusion peptide in blood monocytes.
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Affiliation(s)
- K Namba
- Department of Microbiology, Mie University School of Medicine, 2-174, Edobashi, Tsu-Shi, Mie Prefecture, 514-8507, Japan
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Minamino T, Tame JR, Namba K, Macnab RM. Proteolytic analysis of the FliH/FliI complex, the ATPase component of the type III flagellar export apparatus of Salmonella. J Mol Biol 2001; 312:1027-36. [PMID: 11580247 DOI: 10.1006/jmbi.2001.5000] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The ATPase FliI of the Salmonella type III flagellar protein export apparatus is a 456 amino acid residue cytoplasmic protein consisting of two regions, an N-terminal flagellum-specific region and a C-terminal ATPase region. It forms a complex with a regulatory protein FliH in the cytoplasm. Multi-angle light-scattering studies indicate that FliH forms a homodimer, (FliH)2, and that FliH and FliI together form a heterotrimer, (FliH)2FliI. Mobility upon gel-filtration chromatography gives much higher apparent molecular masses for both species, whereas the mobility of FliI is normal. Sedimentation velocity measurements indicate that both (FliH)2 and the FliH/FliI complex are quite elongated. We have analyzed FliH, FliI and the FliH/FliI complex for proteolytic sensitivity. FliI was degraded by clostripain into two stable fragments, one of 48 kDa (FliI(CL48), missing the first seven amino acid residues) and the other of 46 kDa (FliI(CL46), missing the first 26 residues). Small amounts of two closely spaced 38 kDa fragments (FliI(CL38), missing the first 93 and 97 residues, respectively) were also detected. The FliH homodimer was insensitive to clostripain proteolysis and provided protection to FliI within the FliH/FliI complex. Neither FliI(CL48) nor FliI(CL46) could form a complex with FliH, demonstrating that the N terminus of FliI is essential for the interaction. ATP, AMP-PNP, and ADP bound forms of FliI within the FliH/FliI complex regained sensitivity to clostripain cleavage. Also, the sensitivity of the two FliI(CL38) cleavage sites was much greater in the ATP and AMP-PNP bound forms than in either the ADP bound form or nucleotide-free FliI. The ATPase domain itself was insensitive to clostripain cleavage. We suggest that the N-terminal flagellum-specific region of FliI is flexible and changes its conformation during the ATP hydrolysis cycle.
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Affiliation(s)
- T Minamino
- Protonic Nanomachine Project ERATO, JST, 3-4 Hikaridai, Seika, Kyoto 619-0237, Japan
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Kuroda T, Namba K, Torimaru T, Yamamoto S, Akahori M. Variability of oral bioavailability for low dose methotrexate in rats. Eur J Drug Metab Pharmacokinet 2001; 26:227-34. [PMID: 11808864 DOI: 10.1007/bf03226376] [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: 11/30/2022]
Abstract
The effects of food, antibiotics, diclofenac sodium (DS) and methotrexate (MTX) on oral bioavailability (BA) of MTX were examined in rats. Feeding didn't vary the plasma concentrations after intravenous dosing of 0.5 mg/kg MTX, but enhanced those after oral dosing, and the oral BA. The twice daily oral doses of 40 mg/kg neomycin sulfate (NS) or mixed antibiotics (200 mg/kg NS + 200 mg/kg streptomycin sulfate + 200 mg/kg bacitracin) for 5 days didn't influence the plasma concentrations after intravenous dosing of 0.5 mg/kg MTX, but induced the decreased Cmax and the delayed MRT after oral dosing. The plasma concentrations after intravenous or oral dosing of 2.5 mg/kg MTX in rats orally dosed with 1 or 5 mg/kg/day DS for 4 days were similar to those in the control rats, while the pre-treatment of 25 mg/kg/day DS delayed the elimination of MTX but didn't change the oral BA. The plasma concentrations after intravenous or oral dosing of 2.5 mg/kg MTX in rats, which received the intermittent oral doses of 7.5 mg/kg/3 doses/week MTX for 4 weeks, were comparable to those in the control rats, but the daily pre-treatment of 0.2 mg/kg/day MTX for 4 weeks increased the plasma concentrations after oral dosing, and the BA.
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Affiliation(s)
- T Kuroda
- Department of Drug Metabolism, Medical Research Laboratories, Wyeth Lederle Japan, Ltd, Shiki-shi, Saitama
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Nakahara H, Namba K, Fukami A, Watanabe R, Maeda Y, Furusawa H, Matsu T, Akiyama F, Nakagawa H, Ifuku H, Nakahara M, Tamura S. Three-dimensional MR imaging of mammographically detected suspicious microcalcifications. Breast Cancer 2001; 8:116-24. [PMID: 11342984 DOI: 10.1007/bf02967490] [Citation(s) in RCA: 22] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND The purpose of this study was to evaluate the diagnostic value and clinical significance of three-dimensional MR imaging of the breast in patients with mammographically detected suspicious microcalcifications. METHODS Forty patients with suspicious microcalcifications on mammography were evaluated with three-dimensional MR imaging. MR findings were grouped mainly by distribution of abnormal enhancement (linear, focal-clumped, segmental-clumped, segmental-stippled and diffuse-stippled). These findings were compared with the mammography findings according to the criteria of the Breast Imaging Reporting and Data System (BI-RADS) and histopathologic data. RESULTS Twenty patients had proven malignancies, most frequently ductal carcinoma in situ. For all the cases, linear (100%) and segmental-clumped type (100%) enhancement on MR imaging showed a significantly higher risk for malignancy. Diffuse stippled type (7%) and no enhancement (0%) on MR imaging indicated the lowest possibility of malignancy. 3D-MR imaging showed a sensitivity of 90%, a specificity of 95% and an overall accuracy of 93% in this study. CONCLUSIONS Three-dimensional MR imaging of the breast can more accurately diagnose ductal carcinoma in situ. Combined with mammography, this procedure is useful for reducing the number of false-positive biopsies and helpful for deciding the better management of patients with mammographically detected suspicious microcalcifications.
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Affiliation(s)
- H Nakahara
- Breastopia Namba Hospital, 2-112-1 Maruyama, Miyazaki, Miyazaki 880-0052, Japan
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Abstract
Recently, we have found that the neuropeptide alpha-melanocyte stimulating hormone (alpha-MSH) not only suppresses IFN-gamma production, but also induces TGF-beta1 production by activated effector T cells. These alpha-MSH- treated effector T cells function as regulatory T cells in that they suppress IFN-gamma production and hypersensitivity mediated by other effector T cells. Experimental autoimmune uveoretinitis (EAU) was suppressed in its severity and incidence in mice that were injected with primed T cells activated in vitro by APC and antigen in the presence of alpha-MSH. Moreover, it appeared that alpha-MSH had converted a population of effector T cells polarized to mediate hypersensitivity into a population of T cells that now mediated immunoregulation. To characterize these alpha-MSH- treated T cells, primed T cells were TCR-stimulated in the presence of alpha-MSH in vitro and their lymphokine profile was examined. Such effector T cells displayed enhanced levels of TGF-beta1 production and no IFN-gamma or IL-10, with IL-4 levels remaining unchanged in comparison with inactivated T cells. In addition, if soluble TGF-beta receptor II was added to cocultures of alpha-MSH-treated T cells and activated Th1 cells, the alpha-MSH-treated T cells could not suppress IFN-gamma production by the Th1 cells. These results suggest that alpha-MSH induces T cells with a regulatory lymphokine pattern, and that through their production of TGF-beta1 these cells suppress other effector T cells. Examination of the alpha-MSH-treated T cells showed that alpha-MSH did not alter the phosphorylation of CD3 molecules following TCR engagement. Primed T cells express the melanocortin 5 receptor (MC5r), a receptor that is linked to an intracellular signalling pathway shared by other cytokine receptors. Blocking the receptor with antibody prevented alpha-MSH from suppressing IFN-gamma production by the activated regulatory T cells, suggesting that alpha-MSH immunoregulation is through the MC5r on primed T cells. Surface staining and cell sorting of the alpha-MSH- treated primed T cells showed that the regulatory T cells are CD25+ CD4+ T cells. From these results we find that alpha-MSH can mediate the induction of CD25+ CD4+ regulatory T cells. These regulatory T cells require specific antigen for activation, but through non-specific TGF-beta1-mediated mechanisms they can suppress other effector T cells.
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Affiliation(s)
- A Taylor
- Schepens Eye Research Institute and Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts 02114, USA.
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47
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Namba K, Yonekura K, Maki S, Samatey FA, Imada K. [Understanding the mechanisms of self-assembly and sub A precision switch of the bacterial flagellum based on its molecular structure]. Tanpakushitsu Kakusan Koso 2001; 46:1568-76. [PMID: 11579552] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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48
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Hiraoka T, Namba K, Ogata H, Saitou H. [The alternative or simultaneous excretion of different species of mycobacteria in atypical mycobacteriosis--15 cases in 7 years]. Kekkaku 2001; 76:519-24. [PMID: 11517559] [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: 02/21/2023]
Abstract
Five hundreds and five cases of Mycobacterium tuberculosis infection admitted to our hospital during 7 years from 1993 to 1999. Numbers of newly diagnosed cases were 390, of which 329 (84.4%) were bacilli positive with sputum examination on admission. The recurrent cases were 115, of which 55 (47.8%) were bacilli positive cases. During the same period, mycobacteria other than tuberculosis (atypical mycobacteria) were detected in the sputum of other 121 cases. The 63 (52.1%) out of these 121 cases were diagnosed as atypical mycobacteriosis (AM) due to repetitive detection of bacilli with fulfilled the criteria according to the Japanese Mycobacteriosis Research Group of the National Chest Hospitals. The ratio of 63 AM cases to 329 bacilli positive TB cases was 19.1%, but it range from 8.2% to 31.3% year by year. In these 63 AM cases, 9 (14.3%) cases excreted AM bacilli simultaneously or alternately with TB bacilli. The other 15 (23.8%) cases excreted different AM bacilli simultaneously or alternately. The changes or combinations with M. avium and M. intracellulare were most frequently observed (in 12 cases). The manners of changes and combinations with different species were described in detail.
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Affiliation(s)
- T Hiraoka
- Internal Medicine, National Miyazaki Hospital
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Namba K. [Roles of negative charge interactions in the self-assembly mechanism of tobacco mosaic virus]. Uirusu 2001; 51:63-71. [PMID: 11565267] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- K Namba
- Advanced Technology Research Laboratories, Matsushita Electric Industrial Co., Ltd. and Protonic NanoMachine Project, ERATO, JST, 3-4 Hikaridai, Seika, Kyoto 619-0237, Japan
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Taylor AW, Yee DG, Nishida T, Namba K. Neuropeptide regulation of immunity. The immunosuppressive activity of alpha-melanocyte-stimulating hormone (alpha-MSH). Ann N Y Acad Sci 2001; 917:239-47. [PMID: 11268350 DOI: 10.1111/j.1749-6632.2000.tb05389.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [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: 11/30/2022]
Abstract
The ocular microenvironment is an extreme example of regional immunity. Within its microenvironment, expression of delayed type hypersensitivity (DTH) is suppressed. This immunosuppression is mediated in part by the constitutive expression of alpha-MSH. Previously we have found that alpha-MSH suppresses the production of IFN-gamma by activated effector T cells. Recently we have found that alpha-MSH can mediate induction of TGF-beta-producing T cells that act as regulatory T cells. This has encouraged us to further examine the potential for alpha-MSH to suppress T cell-mediated inflammation (autoimmune disease) and to regulate lymphokine production by effector T cells. When alpha-MSH was injected i.v. into mice at the time of peak retinal inflammation, the severity of experimental autoimmune uveitis (EAU) was significantly suppressed. Effector T cells activated in vitro in the presence of alpha-MSH proliferated and produced IL-4 and enhanced levels of TGF-beta while their IFN-gamma and IL-10 production was suppressed. The alpha-MSH-treated T cells functioned as regulatory T cells by suppressing in vitro IFN-gamma production by other inflammatory T cells. This regulatory activity was the function of alpha-MSH-treated CD4+ CD25+ T cells. Therefore, alpha-MSH mediates immunosuppression by inducing a differential expression of lymphokine production and by inducing activation of regulatory functions in T cells. This implies that alpha-MSH may take part in regional mechanisms of immunosuppression and possibly peripheral tolerance. Thus, alpha-MSH can be used to suppress autoimmune disease and possibly reestablish tolerance to autoantigens.
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Affiliation(s)
- A W Taylor
- Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, USA.
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