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Iwasaki T, Yokoyama Y, Kitano S, Satake A, Matsui K, Sano H. THU0071 Paradoxical Effects of Interleukin-2/Anti-interleukin-2 Monoclonal Antibody Immune Complex on Collagen-Induced Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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102
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Yokoyama Y, Matsumoto K, Ikawa K, Watanabe E, Yamamoto H, Imoto Y, Morikawa N, Takeda Y. Pharmacokinetics of Prophylactic Ampicillin–Sulbactam and Dosing Optimization in Patients Undergoing Cardiovascular Surgery with Cardiopulmonary Bypass. Biol Pharm Bull 2015; 38:1817-21. [DOI: 10.1248/bpb.b15-00334] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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103
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Yokoyama Y, Kawashima T, Ohkawa M, Iwai H, Aoyagi S. Extraction of hidden information of ToF-SIMS data using different multivariate analyses. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5731] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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104
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Matsumoto K, Shigemi A, Takeshita A, Watanabe E, Yokoyama Y, Ikawa K, Morikawa N, Takeda Y. Linezolid dosage in pediatric patients based on pharmacokinetics and pharmacodynamics. J Infect Chemother 2014; 21:70-3. [PMID: 25305808 DOI: 10.1016/j.jiac.2014.08.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 08/14/2014] [Accepted: 08/15/2014] [Indexed: 11/17/2022]
Abstract
Linezolid pharmacokinetic profile in pediatric patients has not been fully characterized, and the dose needed to achieve a pharmacokinetic-pharmacodynamic (PK-PD) target has yet to be established because its efficacy is associated with the area under the plasma drug concentration-time curve (AUC24)/minimum inhibitory concentration (MIC) ratio. The present study aimed to define the pharmacokinetic parameters of intravenous linezolid in pediatric patients and assess the rationale for the approved dosage recommendations. Linezolid was safe, tolerated well, and clinically effective for treating Gram-positive bacteria in five pediatric patients (3-11 years). The mean values for the volume of distribution and total clearance (CL) in a one-compartment model were estimated to be 0.646 ± 0.239 l/kg and 0.171 ± 0.068 l/h/kg, respectively (mean ± S.D.). Based on this analysis, the AUC24 and trough drug concentration in plasma (C(min)) for linezolid doses were predicted to be 175.4 μg h/ml and 3.4 μg/ml for 30 mg/kg/day, 204.7 μg h/ml and 4.3 μg/ml for 35 mg/kg/day, and 263.2 μg h/ml and 6.2 μg/ml for 45 mg/kg/day, respectively. Taking into account that AUC24 should be ≥ 200 μg h/ml for MIC of 2.0 μg/ml (to achieve an AUC24/MIC ratio of ≥ 100) and C(min) should be approximately 7 μg/ml (to avoid thrombocytopenia), we consider the approved dosage of 30 mg/kg/day to be fundamentally rational, but can be underdosed against bacteria with MIC of 2.0 μg/ml; therefore, a dose of 35-45 mg/kg/day is more appropriate to ensure the efficacy and safety of linezolid in pediatric patients.
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Yamaguchi K, Okusaka T, Shimizu K, Furuse J, Ito Y, Hanada K, Shimosegawa T, Yamaguchi K, Okusaka T, Shimizu K, Nakaizumi A, Itoi T, Mizuno N, Hatori T, Yamaue Y, Hanada K, Yamaguchi K, Fujii T, Endo W, Egawa S, Yamaue Y, Yokoyama Y, Furuse J, Ohigashi H, Nagaori T, Kanno S, Uesaka K, Okusaka T, Nakamura S, Ito Y, Shibuya K, Nakamura S, Ohguri T, Nagakura H, Okusaka T, Uesaka K, Kihara Y, Ito T, Furuse J, Hanada K, Itoi T, Mizuno N, Isayama H, Kanno A, Majima Y. EBM-based Clinical Guidelines for Pancreatic Cancer (2013) Issued by the Japan Pancreas Society: A Synopsis. Jpn J Clin Oncol 2014; 44:883-8. [DOI: 10.1093/jjco/hyu127] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kato T, Sakata-Yanagimoto M, Nishikii H, Ueno M, Miyake Y, Yokoyama Y, Asabe Y, Kamada Y, Muto H, Obara N, Suzukawa K, Hasegawa Y, Kitabayashi I, Uchida K, Hirao A, Yagita H, Kageyama R, Chiba S. Hes1 suppresses acute myeloid leukemia development through FLT3 repression. Leukemia 2014; 29:576-85. [PMID: 25234168 DOI: 10.1038/leu.2014.281] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 08/25/2014] [Accepted: 09/09/2014] [Indexed: 12/11/2022]
Abstract
In leukemogenesis, Notch signaling can be up and downregulated in a context-dependent manner. The transcription factor hairy and enhancer of split-1 (Hes1) is well-characterized as a downstream target of Notch signaling. Hes1 encodes a basic helix-loop-helix-type protein, and represses target gene expression. Here, we report that deletion of the Hes1 gene in mice promotes acute myeloid leukemia (AML) development induced by the MLL-AF9 fusion protein. We then found that Hes1 directly bound to the promoter region of the FMS-like tyrosine kinase 3 (FLT3) gene and downregulated the promoter activity. FLT3 was consequently upregulated in MLL-AF9-expressing immortalized and leukemia cells with a Hes1- or RBPJ-null background. MLL-AF9-expressing Hes1-null AML cells showed enhanced proliferation and ERK phosphorylation following FLT3 ligand stimulation. FLT3 inhibition efficiently abrogated proliferation of MLL-AF9-induced Hes1-null AML cells. Furthermore, an agonistic anti-Notch2 antibody induced apoptosis of MLL-AF9-induced AML cells in a Hes1-wild type but not a Hes1-null background. We also accessed two independent databases containing messenger RNA (mRNA) expression profiles and found that the expression level of FLT3 mRNA was negatively correlated with those of HES1 in patient AML samples. These observations demonstrate that Hes1 mediates tumor suppressive roles of Notch signaling in AML development, probably by downregulating FLT3 expression.
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Yamada T, Kan H, Matsumoto S, Koizumi M, Matsuda A, Shinji S, Yokoyama Y, Yamagishi A, Iwai T, Kitano S, Nakayama M, Watanabe A, Uchida E. Liquid Biopsy Detection of Kras and Braf Mutations May Be Useful As a Prognostic or Predictive Marker. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu326.76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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108
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Sato S, Shimada M, Ohta T, Kojimahara T, Tokunaga H, Takano T, Yamaguchi S, Fujiwara K, Tanabe H, Okamoto A, Nishio S, Ushijima K, Futagami M, Yokoyama Y, Fujimoto H, Nakamura H, Nakamura T, Moriyama M, Kai Y, Kigawa J. Adjuvant Chemotherapy Using Taxane Plus Carboplatin for Stage Ib-Iib Cervical Non-Squamous Cell Carcinoma with Pathologic High-Risk Factor. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu338.46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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109
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Itatsu K, Yokoyama Y, Sugawara G, Kubota H, Tojima Y, Kurumiya Y, Kono H, Yamamoto H, Ando M, Nagino M. Incidence of and risk factors for incisional hernia after abdominal surgery. Br J Surg 2014; 101:1439-47. [PMID: 25123379 DOI: 10.1002/bjs.9600] [Citation(s) in RCA: 164] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 05/12/2014] [Accepted: 06/03/2014] [Indexed: 01/17/2023]
Abstract
BACKGROUND Few larger studies have estimated the incidence of incisional hernia (IH) after abdominal surgery. METHODS Patients who had abdominal surgery between November 2009 and February 2011 were included in the study. The incidence rate and risk factors for IH were monitored for at least 180 days. RESULTS A total of 4305 consecutive patients were registered. Of these, 378 were excluded because of failure to complete follow-up and 3927 patients were analysed. IH was diagnosed in 318 patients. The estimated incidence rates for IH were 5·2 per cent at 12 months and 10·3 per cent at 24 months. In multivariable analysis, wound classification III and IV (hazard ratio (HR) 2·26, 95 per cent confidence interval 1·52 to 3·35), body mass index of 25 kg/m(2) or higher (HR 1·76, 1·35 to 2·30), midline incision (HR 1·74, 1·28 to 2·38), incisional surgical-site infection (I-SSI) (HR 1·68, 1·24 to 2·28), preoperative chemotherapy (HR 1·61, 1·08 to 2·37), blood transfusion (HR 1·46, 1·04 to 2·05), increasing age by 10-year interval (HR 1·30, 1·16 to 1·45), female sex (HR 1·26, 1·01 to 1·59) and thickness of subcutaneous tissue for every 1-cm increase (HR 1·18, 1·03 to 1·35) were identified as independent risk factors. Compared with superficial I-SSI, deep I-SSI was more strongly associated with the development of IH. CONCLUSION Although there are several risk factors for IH, reducing I-SSI is an important step in the prevention of IH. REGISTRATION NUMBER UMIN000004723 (University Hospital Medical Information Network, http://www.umin.ac.jp/ctr/index.htm).
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Yokoyama Y, Matsumoto K, Ikawa K, Watanabe E, Shigemi A, Umezaki Y, Nakamura K, Ueno K, Morikawa N, Takeda Y. Pharmacokinetic/pharmacodynamic evaluation of sulbactam against Acinetobacter baumannii in in vitro and murine thigh and lung infection models. Int J Antimicrob Agents 2014; 43:547-52. [DOI: 10.1016/j.ijantimicag.2014.02.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 02/17/2014] [Accepted: 02/22/2014] [Indexed: 11/15/2022]
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111
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Kakudate N, Sumida F, Matsumoto Y, Yokoyama Y, Gilbert GH, Gordan VV. Patient age and dentists' decisions about occlusal caries treatment thresholds. Oper Dent 2014; 39:473-80. [PMID: 24809540 DOI: 10.2341/13-141-c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVES This study was performed to 1) quantify dentists' treatment thresholds for occlusal primary caries; 2) determine if the patient's age affects dentists' decisions to surgically treat these carious lesions; and 3) test the hypothesis that patients', dentists', and practices' characteristics are significantly associated with surgical enamel intervention. METHODS The study used a cross-sectional design consisting of a questionnaire survey in Japan. This study queried dentists working in outpatient dental practices who were affiliated with the Dental Practice-Based Research Network Japan (JDPBRN), which aims to allow dentists to investigate research questions and share experiences and expertise (n=282). Participants were asked whether they would surgically intervene in a series of cases depicting occlusal caries. Each case included a photograph of an occlusal surface displaying typical characteristics of caries penetration and written descriptions of adult and pediatric patients at high caries risk. RESULTS In a case of a carious lesion within inner enamel, the proportion of dentists who indicated surgical intervention was significantly higher in adult patients (48%) when compared with pediatric patients (34%; p<0.01). Logistic regression analysis showed that using a dental explorer for the diagnosis of primary occlusal caries, type of practice, practice busyness, and percentage of patients who self-pay were significantly associated with dentists' decisions to intervene surgically into the inner enamel carious lesion. CONCLUSIONS These findings demonstrate that more than one-third of participants chose to intervene surgically into inner enamel carious lesions, and patients' age affects dentists' decisions about when to intervene surgically (clinicaltrials.gov registration number NCT01680848).
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Yokoyama Y, Nishigaki E, Abe T, Fukaya M, Asahara T, Nomoto K, Nagino M. Randomized clinical trial of the effect of perioperative synbiotics versus no synbiotics on bacterial translocation after oesophagectomy. Br J Surg 2014; 101:189-99. [PMID: 24402842 DOI: 10.1002/bjs.9385] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2013] [Indexed: 12/19/2022]
Abstract
BACKGROUND The impact of perioperative synbiotics on bacterial translocation and subsequent bacteraemia after oesophagectomy is unclear. This study investigated the effect of perioperative synbiotic administration on the incidence of bacterial translocation to mesenteric lymph nodes (MLNs) and the occurrence of postoperative bacteraemia. METHODS Patients with oesophageal cancer were randomized to receive perioperative synbiotics or no synbiotics (control group). MLNs were harvested from the jejunal mesentery before dissection (MLN-1) and after the restoration of digestive tract continuity (MLN-2). Blood and faeces samples were taken before and after operation. Microorganisms in each sample were detected using a bacterium-specific ribosomal RNA-targeted reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR) method. RESULTS Some 42 patients were included. There was a significant difference between the two groups in detection levels of microorganisms in the MLN-1 samples. Microorganisms were more frequently detected in MLN-2 samples in the control group than in the synbiotics group (10 of 18 versus 3 of 18; P = 0·035). In addition, bacteraemia detected using RT-qPCR 1 day after surgery was more prevalent in the control group than in the synbiotics group (12 of 21 versus 4 of 21; P = 0·025). Neutrophil counts on postoperative days 1, 2 and 7 after surgery were all significantly higher in the control group than in the synbiotics group. CONCLUSION Perioperative use of synbiotics reduces the incidence of bacteria in the MLNs and blood. These beneficial effects probably contribute to a reduction in the inflammatory response after oesophagectomy. REGISTRATION NUMBER ID 000003262 (University Hospital Medical Information Network, http://www.umin.ac.jp).
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Matsumoto N, Ebata T, Yokoyama Y, Igami T, Sugawara G, Shimoyama Y, Nagino M. Role of anatomical right hepatic trisectionectomy for perihilar cholangiocarcinoma. Br J Surg 2014; 101:261-8. [PMID: 24399779 DOI: 10.1002/bjs.9383] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2013] [Indexed: 01/11/2023]
Abstract
BACKGROUND Right-sided hepatectomy is often selected for perihilar cholangiocarcinoma because the extrahepatic portion of the left hepatic duct is longer than that of the right hepatic duct. However, the length of resected left hepatic duct in right-sided hepatectomy has not been reported. METHODS Patients who underwent right-sided hepatectomy for perihilar cholangiocarcinoma were reviewed retrospectively. Trisectionectomies were performed according to a previously reported technique of anatomical right hepatic trisectionectomy. Right hepatectomy was performed according to standard operative procedures. The length of resected left hepatic duct was measured. RESULTS Thirty-three patients underwent right trisectionectomy and 141 had a right hemihepatectomy. Patients having a trisectionectomy had more advanced tumours and so required combined portal vein resection more frequently. Duration of surgery and blood loss were similar in the two groups. Morbidity and mortality rates tended to be higher following hemihepatectomy than after trisectionectomy. The mean(s.d.) length of resected left hepatic duct was significantly greater in trisectionectomy than in hemihepatectomy (25·0(6·9) versus 14·8(5·3) mm; P < 0·001). In patients with Bismuth type IV tumours, the percentage of negative left hepatic duct margins was significantly higher for trisectionectomy than for hemihepatectomy (89 versus 57 per cent; P = 0·021). Achievement of R0 resection was similar and survival did not differ between the two groups, despite different tumour load. CONCLUSION Compared with right hemihepatectomy, anatomical right hepatic trisectionectomy provides a greater length of resected hepatic duct, leading to a high proportion of negative proximal ductal margins even in patients with Bismuth type IV tumours.
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Matsumoto K, Kanazawa N, Watanabe E, Yokoyama Y, Fukamizu T, Shimodozono Y, Maeda C, Yasuda T, Kakihana Y, Ikawa K, Morikawa N, Takeda Y. Development of initial loading procedure for teicoplanin in critically ill patients with severe infections. Biol Pharm Bull 2014; 36:1024-6. [PMID: 23727923 DOI: 10.1248/bpb.b12-00911] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is now endemic in many hospitals. Infection with MRSA is more frequent in the intensive care unit (ICU) than in general wards. Therefore, appropriate treatments for MRSA infections will lead to good outcomes in the ICU. Teicoplanin is an anti-MRSA agent. Recently, it was recommended at a new target trough concentration of 15-30 µg/mL. However, the initial loading procedure for teicoplanin to allow it to reach the target concentration promptly remains uncertain. Therefore, this study aimed to determine the appropriate initial loading procedure for teicoplanin in critically ill patients with severe infections. We performed a retrospective study in patients given teicoplanin in the ICU in order to determine the initial loading procedure to promptly reach the target trough concentration. We then evaluated the trough concentration on the third day after commencement of teicoplanin therapy. The mean loading dose and trough concentration were 11.5±1.0 mg/kg and 18.9±5.9 µg/mL, respectively. A correlation (r=0.45, p=0.046) was shown between teicoplanin loading dose and trough concentration. The correlation equation was trough concentration=2.563·loading dose -10.672. In the cases of 11.0 and 15.0 mg/kg for the loading dose, respectively, trough concentrations were 17.5 and 27.8 µg/mL. We suggested that an initial loading dose of 11-15 mg/kg every 12 h for 3 doses should be administered to promptly achieve the target trough concentration of 15-30 µg/mL on the third day after commencement of teicoplanin therapy in the ICU.
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Sato S, Itonaga H, Onimaru Y, Moriuchi Y, Yoshimi K, Yokoyama Y, Hara T, Yamazaki R, Niino D, Ohshima K. Mogamulizumab for Relapsed Adult T-Cell Leukemia-Lymphoma: A Single-Institute Experience. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.48] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Takaiwa N, Obara N, Kurita N, Sakata M, Nishikii H, Yokoyama Y, Suzukawa K, Hasegawa Y, Chiba S. Prevention of the Tumor Lysis-Associated Hyperuricemia by Rasburicase. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Seki M, Kurita N, Yokoyama Y, Sakata M, Obara N, Suzukawa K, Hasegawa Y, Chiba S. A Retrospective Analysis of Elderly Patients with Acute Myeloid Leukemia. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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118
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Takagi M, Aonuma K, Sekiguchi Y, Yokoyama Y, Aihara N, Hiraoka M. The prognostic value of J-wave and ST-segment morphology after J-wave in inferolateral leads in Brugada syndrome without aborted sudden death and/or documented ventricular fibrillation. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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119
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Yokoyama Y, Matsumoto K, Watanabe E, Shigemi A, Umezaki Y, Takeshita A, Nakamura K, Okuno M, Ikawa K, Morikawa N, Takeda Y. P14 Pharmacokinetic and pharmacodynamic evaluation of sulbactam against Acinetobacter baumannii in a murine thigh infection model. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70259-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yokoyama Y, Iwatsuki T, Terada Y, Takahashi Y. Speciation of As in calcite by micro-XAFS: Implications for remediation of As contamination in groundwater. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/430/1/012099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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121
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Kakudate N, Sumida F, Matsumoto Y, Manabe K, Yokoyama Y, Gilbert GH, Gordan VV. Restorative treatment thresholds for proximal caries in dental PBRN. J Dent Res 2012; 91:1202-8. [PMID: 23053847 DOI: 10.1177/0022034512464778] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study was conducted to assess caries treatment thresholds among Japanese dentists and to identify characteristics associated with their decision to intervene surgically in proximal caries lesions within the enamel. Participants (n = 189) were shown radiographic images depicting interproximal caries and asked to indicate the lesion depth at which they would surgically intervene in both high- and low-caries-risk scenarios. Differences in treatment thresholds were then assessed via chi-square tests, and associations between the decision to intervene and dentist, practice, and patient characteristics were analyzed via logistic regression. The proportion of dentists who indicated surgical intervention into enamel was significantly higher in the high-caries-risk scenario (73.8%, N = 138) than in the low-caries-risk scenario (46.5%, N = 87) (p < 0.001). In multivariate analyses for a high-caries-risk scenario, gender of dentist, city population, type of practice, conducting caries-risk assessment, and administering diet counseling were significant factors associated with surgical enamel intervention. However, for a low-caries-risk scenario, city population, type of practice, and use of a dental explorer were the factors significantly associated with surgical enamel intervention. These findings demonstrate that restorative treatment thresholds for interproximal primary caries differ by caries risk. Most participants would restore lesions within the enamel for high-caries-risk individuals.
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Nishio S, Shimada M, Kamura T, Ishitani K, Ochiai K, Takeshima N, Yokoyama Y, Furumoto H, Sugiyama T, Kigawa J. Phase II Study of Combination Chemotherapy with Oral S-1 and Oxaliplatin (SOX) in Patients with Mucinous Adenocarcinoma of the Ovary. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33546-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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123
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Nakagawa A, Yokoyama Y, Suzuki H, Shoji K, Watanabe Y, Imamura A, Kokuryo T, Nagino M. Real-time monitoring of liver damage during experimental ischaemia–reperfusion using a nitric oxide sensor. Br J Surg 2012; 99:1120-8. [DOI: 10.1002/bjs.8817] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2012] [Indexed: 11/11/2022]
Abstract
Abstract
Background
Hepatic ischaemia–reperfusion (IR) injury may lead to liver damage during liver surgery, and intrahepatic nitric oxide (NO) levels may play a role in this context. The aim of this study was to demonstrate real-time changes in intrahepatic NO concentration during IR and to correlate potential hepatic NO production with liver damage using a selective NO sensor.
Methods
Wistar rats were exposed to 15 min of hepatic ischaemia followed by reperfusion, after which changes in intrahepatic NO levels were measured using an NO sensor. Additionally, rats were exposed to five successive periods of IR, each consisting of 15 min ischaemia followed by 5 or 15 min reperfusion, and hepatic damage was evaluated by blood tests and histological examination. Hepatic expression of Akt, phosphorylated Akt, endothelial nitric oxide synthase (eNOS) and phosphorylated eNOS was examined at different time points during and after IR by western blot and immunohistochemical analysis.
Results
During ischaemia, intrahepatic NO levels increased and reached a plateau at approximately 10 min. Repeated 15 min ischaemia–5 min reperfusion cycles reduced the maximum amount of NO produced during ischaemia gradually, and almost no NO production was observed during the fifth period of ischaemia. NO production following repeated ischaemia was proportional to the degree of hepatic viability. Phosphorylated eNOS was upregulated and correlated with the level of NO production during hepatic ischaemia.
Conclusion
Intrahepatic NO levels decrease during repeated IR in rats. Real-time monitoring of intrahepatic NO levels is useful for the prediction of IR-related liver injury during experimental liver surgery.
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Guitera P, Scolyer R, Gill M, Akita H, Arima M, Yokoyama Y, Matsunaga K, Longo C, Bassoli S, Bencini P, Giannotti R, Pellacani G, Alessi-Fox C, Dalrymple C. Reflectance confocal microscopy for diagnosis of mammary and extramammary Paget’s disease. J Eur Acad Dermatol Venereol 2012; 27:e24-9. [DOI: 10.1111/j.1468-3083.2011.04423.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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125
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Futagami M, Yokoyama Y, Mizukami H, Shigeto T, Mizunuma H. Can malignant transformation in mature cystic teratoma be preoperatively predicted? EUR J GYNAECOL ONCOL 2012; 33:662-665. [PMID: 23327068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE OF INVESTIGATION The study aimed to determine whether malignant transformation of mature cystic teratoma (MCT) can be preoperatively predicted by presenting two cases of MCT with malignant transformation and comparing their clinical factors with those of benign MCT encountered at around the same time. MATERIALS AND METHODS Age, maximum tumor diameter, tumor marker levels (serum squamous cell carcinoma (SCC) and carbohydrate antigen (CA) 19-9, the presence of solid tumor masses, and the presence or absence of contrast enhancement in pelvic magnetic resonance imaging (MRI) were investigated in two cases of MCT with malignant transformation and 76 cases of benign MCT in which surgery was performed and a pathological diagnosis given by the department from 2004 to 2010. RESULTS The mean ages of the two cases with malignant transformation and the cases of benign MCT were 42.5 years and 34.2 years, respectively. The mean maximum diameter of the two tumors with malignant transformation and the cases of benign MCT were 130 mm and 73.6 mm, respectively. The mean serum levels of SCC in the two cases with malignant transformation and the cases of benign MCT were 31.5 ng/ml and 0.92 ng/ml, respectively. Contrast enhancement and the presence of solid masses in images of MCT with malignant transformation were apparent. CONCLUSION In order to accurately detect malignant transformation of MCT, the authors found it to be important to determine whether tumors larger than 100 mm in diameter were present and to check for the presence of solid masses enhanced in pelvic MRI examination, as well as to measure at least serum SCC and CA19-9 even in relatively young patients.
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