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Koh E.,Red Cross | Hoshino H.,Red Cross | Saitoh Y.,National Hospital Organization Chiba Medical Center | Iida K.,Red Cross
Interactive Cardiovascular and Thoracic Surgery | Year: 2010

We report a case of a 67-year-old woman with stage IIIB locally advanced non-small cell lung cancer who had also suffered from hyperthyroidism with persistent atrial fibrillation (AF). Thiamazole provided euthyroid status, but medication failed to resolve AF. A computed tomography (CT)-scan revealed a 5×5-cm mass in the left hilar region that involved the left atrium (LA) and bifurcation of the pulmonary artery. Left pneumonectomy, LA partial resection and reconstruction of the bifurcation of the pulmonary artery were performed. In addition, a maze procedure was performed using cardiopulmonary bypass and cardiac arrest. We present the first case report of advanced lung cancer surgery with a maze procedure. Follow-up by CT-scan 34 months later did not show any recurrence and attacks of AF (no medication after surgery) were completely resolved after the operation. © 2010 Published by European Association for Cardio-Thoracic Surgery. All rights reserved. Source


Wu S.,Chiba University | Nakamoto S.,Chiba University | Kanda T.,Chiba University | Jiang X.,Chiba University | And 7 more authors.
International Journal of Medical Sciences | Year: 2014

Hepatitis A virus (HAV) is a causative agent of acute viral hepatitis for which an effective vaccine has been developed. Here we describe ultra-deep pyrosequences (UDPSs) of HAV 5'-untranslated region (5'UTR) among cases of the same outbreak, which arose from a single source, associated with a revolving sushi bar. We determined the reference sequence from HAV-derived clone from an attendant by the Sanger method. Sixteen UDPSs from this outbreak and one from another sporadic case were compared with this reference. Nucleotide errors yielded a UDPS error rate of < 1%. This study confirmed that nucleotide substitutions of this region are transition mutations in outbreak cases, that insertion was observed only in non-severe cases, and that these nucleotide substitutions were different from those of the sporadic case. Analysis of UDPSs detected low-prevalence HAV variations in 5'UTR, but no specific mutations associated with severity in these outbreak cases. To our surprise, HAV strains in this outbreak conserved HAV IRES sequence even if we performed analysis of UDPSs. UDPS analysis of HAV 5'UTR gave us no association between the disease severity of hepatitis A and HAV 5'UTR substitutions. It might be more interesting to perform ultra-deep sequencing of full length HAV genome in order to reveal possible unknown genomic determinants associated with disease severity. Further studies will be needed. © Ivyspring International Publisher. Source


Hiruma K.,Tokyo Metropolitan Komagome Hospital | Numata T.,National Hospital Organization Chiba Medical Center
Auris Nasus Larynx | Year: 2010

Objective: To describe the diagnostic means and therapy employed in three cases of extracranial carotid aneurysms. Methods: Retrospective analysis of three cases. Results: For the diagnosis we obtained real-time pictures of each aneurysm by color Doppler ultrasonography before the angiography. Based on the result of cerebral collateral flow evaluation, ligation of both ends of the aneurysm was performed in one case, embolization of the artery in another, and resection of the aneurysm in the other; vascular reconstruction was not necessary. Although a carotid artery balloon occlusion test must be done before the operation, color Doppler ultrasonography and/or a transcranial color Doppler-guided Matas' test were performed instead, because these patients needed immediate management. Conclusion: The diagnostic procedures were very useful to decide what action to take in such urgent cases. © 2009 Elsevier Ireland Ltd. All rights reserved. Source


Komoda H.,Institute of Biomedical Research and Innovation | Komoda H.,National Hospital Organization Chiba Medical Center | Okura H.,Institute of Biomedical Research and Innovation | Okura H.,Osaka University | And 12 more authors.
Tissue Engineering - Part A | Year: 2010

Adipose tissue is an attractive source for somatic stem cell therapy. Currently, human adipose tissue-derived stromal cells/mesenchymal stem cells (hADSCs/MSCs) are cultured with fetal bovine serum (FBS). Recently, however, not only human embryonic stem cell lines cultured on mouse feeder cells but also bone marrow-derived human MSCs cultured with FBS were reported to express N-glycolylneuraminic acid (Neu5Gc) xenoantigen. Human serum contains high titers of natural preformed antibodies against Neu5Gc. We studied the presence of Neu5Gc on hADSCs/MSCs cultured with FBS and human immune response mediated by Neu5Gc. Our data indicated that hADSCs/MSCs cultured with FBS expressed Neu5Gc and that human natural preformed antibodies could bind to hADSCs/MSCs. However, hADSCs/MSCs express complement regulatory proteins such as CD46, CD55, and CD59 and are largely resistant to complement-mediated cytotoxicity. hADSCs/MSCs cultured with FBS could be injured by antibody-dependent cell-mediated cytotoxicity mechanism. Further, human monocyte-derived macrophages could phagocytose hADSCs/MSCs cultured with FBS and this phagocytic activity was increased in the presence of human serum. Culturing hADSCs/MSCs with heat-inactivated human serum for a week could markedly reduce Neu5Gc on hADSCs/MSCs and prevent immune responses mediated by Neu5Gc, such as binding of human natural preformed antibodies, antibody-dependent cell-mediated cytotoxicity, and phagocytosis. Adipogenic and osteogenic differentiation potentials of hADSCs/MSCs cultured with heat-inactivated human serum were not less than that of those cultured with FBS. For stem cell therapies based on hADSCs/MSCs, hADSCs/MSCs that presented Neu5Gc on their cell surfaces after exposure to FBS should be cleaned up to be rescued from xenogeneic rejection. © 2010 Mary Ann Liebert, Inc. Source


Nakamura J.,Chiba Childrens Hospital | Nakamura J.,Chiba University | Ohtori S.,Chiba University | Sakamoto M.,Chiba Kaihin Municipal Hospital | And 3 more authors.
Clinical and Experimental Rheumatology | Year: 2010

Objective: Systemic lupus erythematosus (SLE) patients are at high risk of developing osteonecrosis, as they require corticosteroid therapy for life. The purpose of this study was to use periodic MRI analysis to clarify (1) the incidence of new osteonecrosis associated with long-term corticosteroid therapy in SLE patients, and (2) the risk factors for delayed osteonecrosis in SLE patients. Methods: We prospectively studied 291 joints (134 hips and 157 knees) in 106 SLE patients without osteonecrosis after initial corticosteroid therapy, with a mean follow-up period of 13.6 years and a follow-up rate of 71%. All patients had undergone periodic MRI examination of the hip and knee joints for >10 years. Results: New osteonecrosis developed in 6 joints (3%) and only occurred after SLE recurrence in association with increased corticosteroid doses (to>30 mg/day [p=0.008]). New lesions were delayed for a mean 5.9 years after initial corticosteroid administration. The mean time from SLE recurrence to appearance of new lesions was 6.2 months. SLE recurrence occurred in 131 joints (45%), while SLE was well controlled in 160 joints (55%). Conclusion: We suggest that with respect to long-term effects, total cumulative dose and duration of corticosteroid therapy do not contribute to osteonecrosis. However, SLE recurrence is a risk factor for new osteonecrosis. We recommend MRI screening for osteonecrosis at SLE recurrence. © Copyright Clinical and Experimental Rheumatology 2010. Source

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