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Yasaka K, Sato C, Hirakawa H, Fujita N, Kurokawa M, Watanabe Y, Kubo T, Abe O. Impact of deep learning on radiologists and radiology residents in detecting breast cancer on CT: a cross-vendor test study. Clin Radiol 2024; 79:e41-e47. [PMID: 37872026 DOI: 10.1016/j.crad.2023.09.022] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/13/2023] [Accepted: 09/29/2023] [Indexed: 10/25/2023]
Abstract
AIM To investigate the effect of deep learning on the diagnostic performance of radiologists and radiology residents in detecting breast cancers on computed tomography (CT). MATERIALS AND METHODS In this retrospective study, patients undergoing contrast-enhanced chest CT between January 2010 and December 2020 using equipment from two vendors were included. Patients with confirmed breast cancer were categorised as the training (n=201) and validation (n=26) group and the testing group (n=30) using processed CT images from either vendor. The trained deep-learning model was applied to test group patients with (30 females; mean age = 59.2 ± 15.8 years) and without (19 males, 21 females; mean age = 64 ± 15.9 years) breast cancer. Image-based diagnostic performance of the deep-learning model was evaluated with the area under the receiver operating characteristic curve (AUC). Two radiologists and three radiology residents were asked to detect malignant lesions by recording a four-point diagnostic confidence score before and after referring to the result from the deep-learning model, and their diagnostic performance was evaluated using jackknife alternative free-response receiver operating characteristic analysis by calculating the figure of merit (FOM). RESULTS The AUCs of the trained deep-learning model on the validation and test data were 0.976 and 0.967, respectively. After referencing with the result of the deep learning model, the FOMs of readers significantly improved (reader 1/2/3/4/5: from 0.933/0.962/0.883/0.944/0.867 to 0.958/0.968/0.917/0.947/0.900; p=0.038). CONCLUSION Deep learning can help radiologists and radiology residents detect breast cancer on CT.
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Affiliation(s)
- K Yasaka
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - C Sato
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - H Hirakawa
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - N Fujita
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - M Kurokawa
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Y Watanabe
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - T Kubo
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - O Abe
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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Hmadeh S, Trimaille A, Matsushita K, Zobairi F, Sato C, Kindo M, Hoang T, Marchandot B, Toti F, Zibara K, Hamade E, Schini Kerth V, Kauffenstein G, Morel O. Enrichment in procoagulant microparticles in calcified human aortic valve – role in valvular endothelium alterations and enhanced thrombogenicity. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Aortic stenosis (AS) is characterized by endothelial dysfunction (ED), inflammatory cell infiltration, myofibroblastic and osteoblastic differentiation. Subclinical leaflet thrombosis was recently linked to higher rates of stroke and transient ischemic attack after transcatheter aortic valve implantation (TAVI). Procoagulant microparticles (MPs) are associated with ED, inflammation and clot formation. There is limited evidence regarding intra-valvular MPs content and their potential biological effects. This question is particularly relevant in TAVI in which the residing native valve could constitute a source of thrombotic activity enhancing leaflet thrombosis and valve dysfunction.
Purpose
Therefore, we hypothesized that MPs trapped within the native aortic valve contribute to valvular dysfunction including enhanced thrombogenicity.
Methods
Human valves were collected from patients undergoing surgical valve replacement for AS or aortic insufficiency (AI). Pro-thrombotic, pro-inflammatory, and ED markers were identified in the calcified vs non-calcified part of the valves by Western-blot. Calcium content was measured through colorimetric method. MPs were extracted from human pathological valves, and quantified through their prothrombinase activity. Primary cultures of porcine valvular endothelial cells (VEC) were treated with the MPs (10 nmol/L) or thrombin (1U/ml) for 24hrs. Phenotypic change was appreciated through gene expression pattern assessed by RT-qPCR. IL-8 secretion was measured by ELISA.
Results
The phenotype of the AS valve was characterized through increased expression of thrombogenic (tissue factor, thrombomodulin, PAI-1), adhesive (VCAM-1, ICAM-1) and inflammatory (COX-1, COX-2) molecules in the calcified part of the valve. Moreover, MPs content was increased in the calcified vs non-calcified part of the valve or AI valves. MPs levels was correlated with valvular calcium content (R=0.3862: p<0.001). Tissue factor was increased in MPs extracted from AS vs AI. The biological effect of MPs was tested on VEC in-vitro. Results showed dramatic increase in expression of inflammatory cytokines (CXCL10, CCL11, CXCL8, MCP1) adhesion molecules (VCAM-1, ICAM-1, SELP, SELE) and proangiogenic factors (VEGFR2, ANGPTL4) in VEC exposed to MPs (24h) from AS vs AI. Enhanced secretory phenotype was evidenced through IL-8 determination in the supernatant of VEC stimulated with MPs from AS valve.
Conclusion
Calcified aortic valve is a potent reservoir of MPs, acting as a pro-thrombogenic source per se and promoting a switch of VEC phenotype toward prothrombotic, proinflammatory and proangiogenic pattern. These data suggest that MPs released from the native valve constitute an important source of mediators involved in enhanced thrombogenicity and valvular remodeling.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): GERCA-Groupe Etudes Reali Commercia Avignon
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Affiliation(s)
- S Hmadeh
- INSERM, UMR 1260 , Strasbourg , France
| | - A Trimaille
- Civil Hospital/ Nouvel Hopital Civil , Strasbourg , France
| | | | - F Zobairi
- INSERM, UMR 1260 , Strasbourg , France
| | - C Sato
- INSERM, UMR 1260 , Strasbourg , France
| | - M Kindo
- Civil Hospital/ Nouvel Hopital Civil , Strasbourg , France
| | - T Hoang
- Civil Hospital/ Nouvel Hopital Civil , Strasbourg , France
| | - B Marchandot
- Civil Hospital/ Nouvel Hopital Civil , Strasbourg , France
| | - F Toti
- INSERM, UMR 1260 , Strasbourg , France
| | - K Zibara
- Lebanese University , Beirut , Lebanon
| | - E Hamade
- Lebanese University , Beirut , Lebanon
| | | | | | - O Morel
- Civil Hospital/ Nouvel Hopital Civil , Strasbourg , France
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3
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Nakata M, Shimbo T, Kihara A, Sato C, Hori A, Yoshioka H, Yoshida K, Nihei K. Optimisation of Radiation Therapy in Bladder Preservation Therapy for Patients With Clinical Stage T2N0M0 Bladder Cancer. Clin Oncol (R Coll Radiol) 2022; 34:e430-e436. [PMID: 35715341 DOI: 10.1016/j.clon.2022.05.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 05/01/2022] [Accepted: 05/23/2022] [Indexed: 11/18/2022]
Abstract
AIMS A novel bladder preservation therapy, the OMC (Osaka Medical College) regimen, which combines radiation therapy with balloon-occluded arterial infusion of anticancer agents, is a treatment option for patients with muscle-invasive bladder cancer (MIBC). We retrospectively analysed the effects of changes in radiation dose and irradiation field on treatment efficacy and adverse events.The purpose of this study is to use the results of this study to help determine a course of radiation therapy for bladder preservation therapy of cT2N0M0 MIBC. MATERIALS AND METHODS We examined 352 patients with clinical stage T2N0M0 (cT2N0M0) MIBC classified into the following groups based on the irradiation method: group A, the whole pelvis (50 Gy/25 fractions) + local bladder (10 Gy/5 fractions); group B, the small pelvis (50 Gy/25 fractions) + local bladder (10 Gy/5 fractions); group C, the whole pelvis (40 Gy/20 fractions) + local bladder (10 Gy/5 fractions). RESULTS The complete response rate, 3-year overall survival and progression-free survival rates in group A were 92.9%, 94.9% and 82.1%, respectively; in group B were 87.2%, 86.7% and 76.7%, respectively; and in group C were 95.2%, 92.6% and 71.1%, respectively. No significant differences between the groups were noted. The incidence of ≥grade 3 urinary tract and gastrointestinal toxicities were not significantly different among the groups (group A: 7.8%, 1.7%; B, 11.1%, 0%; C, 7.1%, 1.8%, respectively). The 3-year progression-free rates of the common iliac lymph node (CILN) region in patients who received whole-pelvis and small-pelvis irradiation were 99.0 and 89.0% (P < 0.01), respectively, with the latter group having significantly high lymph node recurrence in the CILN region. CONCLUSIONS Our findings showed that the optimal radiation therapy for patients with cT2N0M0 MIBC undergoing the OMC regimen is whole-pelvis irradiation including the CILN region, with a total dose of 50 Gy/25 fractions.
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Affiliation(s)
- M Nakata
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - T Shimbo
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan.
| | - A Kihara
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - C Sato
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - A Hori
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - H Yoshioka
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan
| | - K Yoshida
- Department of Radiology, Kansai Medical University Medical Center, Osaka, Japan
| | - K Nihei
- Department of Radiation Oncology, Osaka Medical and Pharmaceutical University, Osaka, Japan
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Matsushita K, Marchandot B, Hess S, Kibler M, Sato C, Heger J, Truong D, Trimaille A, Sattler L, Grunebaum L, Reydel Dedieu A, Jesel L, Ohlmann P, Morel O. Primary hemostatic disorders drive early and late major bleedings of patients with atrial fibrillation after transcatheter aortic valve replacement. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2021.09.142] [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: 10/19/2022]
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5
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Matsushita K, Marchandot B, Hess S, Kibler M, Sato C, Heger J, Truong DP, Trimaille A, Sattler L, Grunebaum L, Reydel A, Jesel L, Ohlmann P, Morel O. Primary hemostatic disorders drive early and late major bleedings of patients with atrial fibrillation after transcatheter aortic valve replacement. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Patients with atrial fibrillation (AF) are likely to have multiple co-morbidities and receive anticoagulants after TAVR, which lead to a poor prognosis including bleeding events. Closure time adenosine diphosphate (CT-ADP) is a primary hemostasis point-of-care test used as a surrogate marker of high molecular weight (HMW) multimers defect of Von Willebrand factor (VWF). Our prior studies suggest that prolongation of CT-ADP (>180 seconds) after TAVR is a major determinant of early and late major/life-threatening bleeding complications (MLBCs).
Purpose
To evaluate the impact of post-procedural CT-ADP >180sec on bleeding events in AF patients.
Methods
We included 878 patients from our prospective TAVR registry between 2010 and 2019. Bleeding complications were assessed according to the VARC-2 (Valve Academic Research Consortium-2) criteria. Major adverse cardiac and cerebrovascular events (MACCE) was defined as a composite of all-cause death, myocardial infarction, stroke, and heart failure hospitalization within 1-year after TAVR. Ongoing primary haemostasis disorder was defined by post-procedure CT-ADP >180sec. Primary endpoint was the occurrence of MLBCs during the first year and the second endpoint was 1-year MACCE.
Results
Patients with AF had a higher incidence of all-cause mortality (15% vs. 8%, p=0.002), MACCE (29% vs. 20%, p=0.002), and MLBCs (20% vs. 12%, p=0.001) within 1-year compared to non-AF patients. When the cohort was split into 4 subgroups according to AF and CT-ADP >180sec, patients with AF and CT-ADP >180sec had the highest risk of MLBCs (log-rank test; p<0.001) (Figure). Multivariate Cox regression analysis confirmed that the patients with AF and CT-ADP >180sec had 4.6-fold higher risk of MLBCs within 1 year compared to non-AF patients with CT-ADP ≤180sec (hazard ratio: 4.60; 95% confidence interval: 2.18 - 9.68; p<0.001).
Conclusion
Among TAVR patients, AF with post-procedural CT-ADP >180 sec was identified as a strong independent predictor of MLBCs at 1-year follow-up. Our study suggest that persistent primary haemostasis disorders contribute to a higher risk of bleeding events particularly in AF patients and may be considered for a tailored and risk-adjusted antithrombotic therapy after TAVR.
Funding Acknowledgement
Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): Dr Matsushita received a grant from Edwards Lifesciences.
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Affiliation(s)
- K Matsushita
- University Hospital of Strasbourg, Strasbourg, France
| | - B Marchandot
- University Hospital of Strasbourg, Strasbourg, France
| | - S Hess
- University Hospital of Strasbourg, Strasbourg, France
| | - M Kibler
- University Hospital of Strasbourg, Strasbourg, France
| | - C Sato
- University Hospital of Strasbourg, Strasbourg, France
| | - J Heger
- University Hospital of Strasbourg, Strasbourg, France
| | - D P Truong
- University Hospital of Strasbourg, Strasbourg, France
| | - A Trimaille
- University Hospital of Strasbourg, Strasbourg, France
| | - L Sattler
- University Hospital of Strasbourg, Strasbourg, France
| | - L Grunebaum
- University Hospital of Strasbourg, Strasbourg, France
| | - A Reydel
- University Hospital of Strasbourg, Strasbourg, France
| | - L Jesel
- University Hospital of Strasbourg, Strasbourg, France
| | - P Ohlmann
- University Hospital of Strasbourg, Strasbourg, France
| | - O Morel
- University Hospital of Strasbourg, Strasbourg, France
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6
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Matsushita K, Sato C, Bruckert C, Gong D, Hmadeh S, Fakih W, Remila L, Auger C, Jesel L, Ohlmann P, Kauffenstein G, Schini-Kerth V, Morel O. Protective effects of dapagliflozin on vascular remodeling in the carotid artery following balloon injury – potential role of angiotensin and purinergic signaling. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Sodium-glucose co-transporter 2 (SGLT2) inhibitors have been shown to reduce the risk of cardiovascular events independently of glycemic control. The possibility that SGLT2 inhibitors improve endothelial regeneration and vascular restenosis is unknown.
Purpose
To examine whether dapagliflozin, a selective SGLT2 inhibitor, could prevent neointima thickening induced by balloon injury and, if so, to determine the underlying mechanisms. The effect of dapagliflozin was compared to that of losartan, an angiotensin type 1 receptor (AT1R) antagonist.
Methods
Saline, dapagliflozin (1.5 mg/kg/day), or losartan (30 mg/kg/day) were administered orally for 5 weeks to male Wistar rats. Balloon injury of the left carotid artery was performed 1 week after starting the treatment and sacrificed 4 weeks later. Vascular reactivity was assessed on left (injured) and right (healthy) carotid artery rings. The extent of neointima was assessed by histomorphometric analysis, changes of target factors by immunofluorescence, RT-qPCR and histochemistry.
Results
Dapagliflozin and losartan treatments reduced neointima thickening by 32% and 27%, respectively. Blunted contractile responses to phenylephrine and relaxations to acetylcholine and down-regulation of eNOS were observed in the injured artery. These effects were not modified by the dapagliflozin or the losartan treatments. RT-qPCR investigations indicated an increased in gene expression of inflammatory (IL-1beta, ITGAM, VCAM-1), oxidative (p47phox, p22phox) and fibrotic (TGF-beta1) markers and a decreased of eNOS in the injured carotid. However, these changes were not affected by the pharmacological treatments. By contrast, significant increased levels of AT1R angiotensin receptor and NTPDase1 (CD39) ectonucleotidase were observed in the restenotic carotid artery of the dapagliflozin group. Histochemical analysis evidenced important NTPDase1 activity in the neointima.
Conclusions
Dapagliflozin effectively reduced neointimal thickening. As the contribution of AT1R and P2Y2 ATP receptor in smooth muscle cell proliferation and neointima formation has been reported in the literature, the present data suggest that dapagliflozin prevents restenosis through interfering with angiotensin and/or extracellular nucleotides signaling. SGLT2 transporter represent potential new target for limiting vascular restenosis.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): This work was supported by AstraZeneca
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Affiliation(s)
- K Matsushita
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - C Sato
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - C Bruckert
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - D Gong
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - S Hmadeh
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - W Fakih
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - L Remila
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - C Auger
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - L Jesel
- University Hospital of Strasbourg, Strasbourg, France
| | - P Ohlmann
- University Hospital of Strasbourg, Strasbourg, France
| | - G Kauffenstein
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - V Schini-Kerth
- University of Strasbourg, UMR1260 INSERM, Nanomédecine Régénérative, Faculté de Pharmacie, Strasbourg, France
| | - O Morel
- University Hospital of Strasbourg, Strasbourg, France
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Lachmet-Thébaud L, Marchandot B, Matsushita K, Sato C, Dagrenat C, Greciano S, De Poli F, Leddet P, Carmona A, Jimenez C, Heger J, Reydel A, Ohlmann P, Jesel L, Morel O. Residual systemic inflammatory burden is a major determinant of myocardial recovery and late cardiovascular outcome in Takotsubo patients. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2020.10.323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Trimaille A, Curtiaud A, Marchandot B, Matsushita K, Sato C, Leonard-Lorant I, Sattler L, Grunebaum L, Ohana M, Von Hunolstein J, Andres E, Goichot B, Danion F, Kaeuffer C, Poindron V, Ohlmann P, Jesel L, Morel O. Venous thromboembolism in non-critically ill patients with COVID-19 infection. Archives of Cardiovascular Diseases Supplements 2021. [PMCID: PMC7803092 DOI: 10.1016/j.acvdsp.2020.10.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Background Systemic coagulation activation and thrombotic complications are frequent among critically ill patients with COVID-19. Limited data are available in non-intensive care unit (ICU) patients. Purpose To determine the incidence, risk factors and prognosis of venous thromboembolism (VTE) in non-ICU COVID-19 patients. Methods We studied consecutive COVID-19 patients admitted to general ward at Strasbourg Hospital, France (25.02.2020–19.04.2020). The primary outcome was any VTE complication. The secondary outcome was the composite of death or transfer to ICU. Results Among the 289 patients included (62.2 ± 17.0 years, 59.2% male), VTE occurred in 49 (17.0%). Padua prediction score for VTE was similar between VTE and non-VTE patients. VTE imaging tests were performed in 100 (34.6%) patients and VTE diagnosed in median 7 (3–11) days after admission. On-admission, time from symptom onset to admission (OR 1.07, CI 95% [1.00–1.16], P = 0.045), Improve score (OR 1.37, [1.02–1.83], P = 0.032), leukocyte count (OR 1.16, [1.06–1.27], P = 0.001) and lack of thromboprophylaxis (OR 27.85, CI 95% [9.35–82.95], P < 0.001) were independent predictors of VTE. The incidence of the composite of death or ICU transfer was 31.0% and more frequent among patients with VTE (47.9% vs. 27.9%, P = 0.01). Fever (OR 5.37, CI 95% [1.44–19.97], P = 0.012), VTE (OR 3.44, CI 95% [1.63–7.25], P = 0.001), lymphopenia (OR 0.32, 95% CI [0.15–0.71]; P = 0.005) and extent of COVID-19 evaluated by chest CT severity (OR 1.56, 95% CI [1.12–2.16]; P = 0.007) were independently associated with in-hospital death or transfer to ICU (Table 1, Fig. 1). Conclusions The 17.0% incidence of VTE in non-ICU patients with COVID-19 was associated with worse outcomes. Given the high incidence of VTE in ward patients, there is an urgent need to investigate the optimal anticoagulation regimen.
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Matsushita K, Marchandot B, Kibler M, Sato C, Heger J, Peillex M, Trimaille A, Hess S, Grunebaum L, Ohana M, Reydel A, Jesel L, Ohlmann P, Morel O. P2Y12 inhibition by clopidogrel increases adverse clinical outcomes in patients undergoing transcatheter aortic valve replacement. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Current recommendations support short-term dual antiplatelet therapy (DAPT) for patients undergoing transcatheter aortic valve replacement (TAVR) despite no relevant study exploring the extent of platelet inhibition by clopidogrel.
Purpose
To assess whether P2Y12 inhibition by clopidogrel as evaluated by vasodilator-stimulated phosphoprotein flow cytometry test (VASP-FCT) impacts 1-year clinical outcomes in patients undergoing TAVR.
Methods
Patients were included in a prospective registry between February 2010 and May 2019. VASP-FCT was assessed 24h after the procedure. Responder to clopidogrel was defined by a platelet reactivity index ≤50%.
Results
Of 640 patients who underwent TAVR with preprocedural clopidogrel therapy, we enrolled 491 patients for whom VASP data were available. Responders were identified in 22% (n=110) of patients and low responders were 78% (n=381) of patients. Low body mass index, active cancer, and clopidogrel on admission were found to be independent predictors of responder. Mean transaortic pressure gradient was lower in the responder group at 1-month post-TAVR (9.9±4.4 mmHg vs. 11.2±5.8 mmHg, p=0.03) but was similar at 1-year (11.5±6.2 mmHg vs. 11.9±7.4 mmHg, p=0.74). By multivariate Cox regression analysis, patients responding to clopidogrel (hazard ratio [HR]: 2.19; 95% confidence interval [CI]: 1.04 to 3.64; p=0.04), prior PCI (HR: 2.12; 95% CI: 1.07 to 4.37; p=0.03), and mean transaortic pressure gradient at baseline (HR: 0.07; 95% CI: 0.01 to 0.70; p=0.02) were identified as independent predictors of 1-year adverse clinical outcomes, including all-cause death, myocardial infarction, stroke, and heart failure hospitalization.
Conclusions
Appropriate P2Y12 inhibition by clopidogrel is a major determinant of adverse clinical events after TAVR. In sum, the present data challenges the need of DAPT as a standard therapy during TAVR.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Matsushita
- University Hospital of Strasbourg, Strasbourg, France
| | - B Marchandot
- University Hospital of Strasbourg, Strasbourg, France
| | - M Kibler
- University Hospital of Strasbourg, Strasbourg, France
| | - C Sato
- University Hospital of Strasbourg, Strasbourg, France
| | - J Heger
- University Hospital of Strasbourg, Strasbourg, France
| | - M Peillex
- University Hospital of Strasbourg, Strasbourg, France
| | - A Trimaille
- University Hospital of Strasbourg, Strasbourg, France
| | - S Hess
- University Hospital of Strasbourg, Strasbourg, France
| | - L Grunebaum
- University Hospital of Strasbourg, Strasbourg, France
| | - M Ohana
- University Hospital of Strasbourg, Strasbourg, France
| | - A Reydel
- University Hospital of Strasbourg, Strasbourg, France
| | - L Jesel
- University Hospital of Strasbourg, Strasbourg, France
| | - P Ohlmann
- University Hospital of Strasbourg, Strasbourg, France
| | - O Morel
- University Hospital of Strasbourg, Strasbourg, France
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10
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Lachmet-Thebaud L, Marchandot B, Matsushita K, Sato C, Dagrenat C, Greciano S, De Poli F, Leddet P, Peillex M, Hess S, Carmona A, Reydel A, Ohlmann P, Jesel L, Morel O. Residual inflammation is a major determinant of myocardial recovery and cardiovascular outcome in takotsubo patients. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1835] [Citation(s) in RCA: 1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Recent insights have emphasized the importance of myocardial and systemic inflammation in Takotsubo Syndrome (TTS).
Objective
In a large registry of unselected patients, we sought to evaluate whether residual high inflammatory response (RHIR) could impact cardiovascular outcome after TTS.
Methods
Patients with TTS were retrospectively included between 2008 and 2018 in three general hospitals. 385 patients with TTS were split into three subgroups, according to tertiles of C-reactive protein (CRP) levels at discharge (CRP<5.2 mg/l, CRP range 5.2 to 19 mg/l, and CRP>19 mg/L). The primary endpoint was the impact of RHIR, defined as CRP>19 mg/L at discharge, on cardiac death or hospitalization for heart failure.
Results
Follow-up was obtained in 382 patients (99%) after a median of 747 days. RHIR patients were more likely to have a history of cancer or a physical trigger. Left ventricular ejection fraction (LVEF) at admission and at discharge were comparable between groups. By contrast, RHIR was associated with lower LVEF at follow-up (61.7 vs. 60.7 vs. 57.9%; p=0.004) and increased cardiac late mortality (0% vs. 0% vs. 10%; p=0.001). By multivariate Cox regression analysis, RHIR was an independent predictor of cardiac death or hospitalization for heart failure (hazard ratio: 1.97; 95% confidence interval: 1.11 to 3.49; p=0.02).
Conclusions
RHIR was associated with impaired LVEF recovery and was evidenced as an independent factor of cardiovascular events. All together these findings underline RHIR patients as a high-risk subgroup, to target in future clinical trials with specific therapies to attenuate RHIR.
Main results
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): GERCA (Groupe pour l'Enseignement, la prévention et la Recherche Cardiovasculaire en Alsace)
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Affiliation(s)
| | - B Marchandot
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - K Matsushita
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - C Sato
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - C Dagrenat
- Haguenau Hospital Centre, Cardiology, Haguenau, France
| | - S Greciano
- Civil Hospital of Colmar, Colmar, France
| | - F De Poli
- Haguenau Hospital Centre, Cardiology, Haguenau, France
| | - P Leddet
- Civil Hospital of Colmar, Colmar, France
| | - M Peillex
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - S Hess
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - A Carmona
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - A Reydel
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - P Ohlmann
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - L Jesel
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
| | - O Morel
- Civil Hospital/Nouvel Hopital Civil, Strasbourg, France
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11
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Matsushita K, Marchandot B, Kibler M, Sato C, Heger J, Peillex M, Trimaille A, Hess S, Grunebaum L, Ohana M, Reydel A, Jesel L, Ohlmann P, Morel O. Predictive impact of PVL assessments on clinical outcomes in patients undergoing TAVR. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Paravalvular leakage (PVL) following transcatheter aortic valve replacement (TAVR) is associated with greater mortality. In clinical practice, determining PVL severity after TAVR remains challenging and often requires multiparametric assessment.
Purpose
This study sought to evaluate the respective value of various modalities of PVL assessments, including transthoracic echocardiography (TTE), cine-angiography, aortic regurgitation index (ARI), and closure time with adenosine diphosphate (CT-ADP), in the prediction of adverse clinical outcomes.
Methods
We included 1044 patients from our prospective TAVR registry between February 2010 and May 2019. Major adverse cardiac and cerebrovascular events (MACCE) was defined as a composite of all-cause death, myocardial infarction, stroke, and heart failure hospitalization within 1-year. Established cutoff values of ARI (<25) and CT-ADP (>180 sec) were used to assess the presence of PVL after TAVR.
Results
Moderate to severe PVL occurred in 14.2% and 5.2% of patients as measured by TTE and angiography. The rate of patients with ARI <25 and CT-ADP >180 sec were 36.5% and 24.9%, respectively. Among the four modalities, PVL evaluated by angiography predicted poorer clinical outcomes (Log rank test; p=0.001), whereas TTE, ARI <25, and CT-ADP >180 sec were not associated with 1-year MACCE. By multivariate Cox regression analysis, moderate to severe PVL by angiography was an independent predictor of 1-year MACCE (hazard ratio: 1.96; 95% confidence interval: 1.22–3.00; p=0.007).
Conclusions
Paravalvular leakage measured by angiography was evidenced as the most meaningful modality in the prediction of adverse clinical outcomes. Future multicenter studies are warranted to ensure these findings in the current TAVR era.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Matsushita
- University Hospital of Strasbourg, Strasbourg, France
| | - B Marchandot
- University Hospital of Strasbourg, Strasbourg, France
| | - M Kibler
- University Hospital of Strasbourg, Strasbourg, France
| | - C Sato
- University Hospital of Strasbourg, Strasbourg, France
| | - J Heger
- University Hospital of Strasbourg, Strasbourg, France
| | - M Peillex
- University Hospital of Strasbourg, Strasbourg, France
| | - A Trimaille
- University Hospital of Strasbourg, Strasbourg, France
| | - S Hess
- University Hospital of Strasbourg, Strasbourg, France
| | - L Grunebaum
- University Hospital of Strasbourg, Strasbourg, France
| | - M Ohana
- University Hospital of Strasbourg, Strasbourg, France
| | - A Reydel
- University Hospital of Strasbourg, Strasbourg, France
| | - L Jesel
- University Hospital of Strasbourg, Strasbourg, France
| | - P Ohlmann
- University Hospital of Strasbourg, Strasbourg, France
| | - O Morel
- University Hospital of Strasbourg, Strasbourg, France
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12
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Matsushita K, Lachmet-Thebaud L, Marchandot B, Sato C, Dagrenat C, Greciano S, De Poli F, Leddet P, Trimaille A, Heger J, Reydel A, Trinh A, Ohlmann P, Jesel L, Morel O. Incomplete recovery of takotsubo cardiomyopathy is a major determinant of cardiovascular mortality. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Although there is an apparent rapid and spontaneous recovery of left ventricular ejection fraction (LVEF) in patients with takotsubo cardiomyopathy, recent studies have demonstrated the long-lasting functional impairment in those patients.
Purpose
We sought to evaluate the predictors of incomplete recovery in chronic phase and its impact on cardiovascular mortality after takotsubo cardiomyopathy.
Methods
Patients with takotsubo cardiomyopathy between 2008 and 2018 were retrospectively enrolled in three different institutions. Takotsubo cardiomyopathy was diagnosed according to the European Society of Cardiology Heart Failure Association criteria. After exclusion of in-hospital deaths, 407 patients were split into 2 subgroups according whether their LVEF were >50% (recovery group; n=333), or ≤50% (incomplete recovery group; n=74) at follow-up. The primary endpoint was the impact of incomplete recovery on cardiovascular mortality.
Results
Patients with incomplete recovery were more likely to be male, to have dementia, pacemaker, and supraventricular arrhythmia. C-reactive protein (CRP) levels on admission, at peak, and at discharge were significantly higher in patients with incomplete recovery. By multivariate logistic regression analysis, lower EF at discharge (odds ratio [OR]: 0.91; 95% confidence interval [CI]: 0.88 to 0.95; p<0.001) and higher CRP levels (OR: 5.56; 95% CI: 1.86 to 16.61; p<0.001) were independent predictors of incomplete recovery at follow-up. The cumulative event-free survival rate according to cardiovascular death was significantly lower in the incomplete recovery group (p<0.001; log-rank test).
Conclusions
We demonstrate that incomplete recovery after takotsubo cardiomyopathy is characterized by a residual systemic inflammation and an increased cardiac mortality at follow-up. Altogether, our findings underline patients with persistent inflammation as a high-risk subgroup, to target in future clinical trials with specific therapies to attenuate inflammation.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Matsushita
- University Hospital of Strasbourg, Strasbourg, France
| | | | - B Marchandot
- University Hospital of Strasbourg, Strasbourg, France
| | - C Sato
- University Hospital of Strasbourg, Strasbourg, France
| | - C Dagrenat
- Haguenau Hospital Centre, Haguenau, France
| | - S Greciano
- Civil Hospital of Colmar, Colmar, France
| | - F De Poli
- Haguenau Hospital Centre, Haguenau, France
| | - P Leddet
- Haguenau Hospital Centre, Haguenau, France
| | - A Trimaille
- University Hospital of Strasbourg, Strasbourg, France
| | - J Heger
- University Hospital of Strasbourg, Strasbourg, France
| | - A Reydel
- University Hospital of Strasbourg, Strasbourg, France
| | - A Trinh
- University Hospital of Strasbourg, Strasbourg, France
| | - P Ohlmann
- University Hospital of Strasbourg, Strasbourg, France
| | - L Jesel
- University Hospital of Strasbourg, Strasbourg, France
| | - O Morel
- University Hospital of Strasbourg, Strasbourg, France
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13
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Itsukage S, Kambe N, Ueki Y, Sato C, Nakano H. Hailey-Hailey disease with a novel variant, c.1978dupG, in the ATP2C1 gene. Clin Exp Dermatol 2020; 45:914-915. [PMID: 32441372 DOI: 10.1111/ced.14306] [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] [Accepted: 05/19/2020] [Indexed: 11/29/2022]
Affiliation(s)
- S Itsukage
- Departments of, Department of, Dermatology, Kansai Medical University, Hirakata, Osaka, Japan
| | - N Kambe
- Departments of, Department of, Dermatology, Kansai Medical University, Hirakata, Osaka, Japan.,Department of Dermatology, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan
| | - Y Ueki
- Departments of, Department of, Dermatology, Kansai Medical University, Hirakata, Osaka, Japan
| | - C Sato
- Department of, Pathology and Laboratory Medicine, Kansai Medical University, Hirakata, Osaka, Japan
| | - H Nakano
- Department of Dermatology, Hirosaki University School of Medicine, Hirosaki, Aomori, Japan
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14
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Sato C, Wakabayashi K, Honda Y, Shibata K, Furuya T, Nishikura T, Ikeda N, Kikuchi M, Miyoshi F, Toshida T, Tanno K. P241Low exercise tolerance predicts critical myocardial ischemia in asymptomatic patients with diabetic mellitus. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- C Sato
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - K Wakabayashi
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - Y Honda
- Fuji hospital, Division of Cardiology, Shizuoka, Japan
| | - K Shibata
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - T Furuya
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - T Nishikura
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - N Ikeda
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - M Kikuchi
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - F Miyoshi
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - T Toshida
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
| | - K Tanno
- Showa University Koto-Toyosu Hospital, Division of Cardiology, Cardiovascular Center, Tokyo, Japan
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15
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Naganuma R, Sato S, Kudo A, Sato C, Uwatoko H, Shirai S, Nishimura H, Takahashi I, Matsushima M, Kano T, Yabe I, Houzen H, Sasaki H. Long term observation of Lambert-Eaton myasthenic syndrome patients treated with 3,4-diaminopyridine. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1844] [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]
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16
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Kiguchi T, Sato C, Takai K, Nakai Y, Kaneko Y, Matsuki M. CT findings in 11 patients with TAFRO syndrome: a variant of multicentric Castleman's disease. Clin Radiol 2017. [DOI: 10.1016/j.crad.2017.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Sato C, Tsuchida T, Kuroshima K, Ura S, Yoshida K, Yabe I, Sasaki H. Clinical features of patients with epilepsy who were admitted to the emergency department of our hospital. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1929] [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: 10/18/2022]
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18
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Kuroshima K, Tsuchida T, Sato C, Ura S, Yoshida K, Shimoyama S, Sakai T, Konuma Y, Kohda K. Clinical importance of changes in MRI during early stage of human herpesvirus-6 encephalitis after hematopoietic stem cell transplantation. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3407] [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: 11/26/2022]
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19
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Yamada K, Ohno T, Kitamura T, Ohno Y, Sato C, Kanai H, Kamimoto K. Neuroradiologic evaluation of ischemic or non-ischemic lesions of transient global amnesia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2908] [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: 10/18/2022]
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20
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Sato T, Sato C, Kadowaki A, Watanabe H, Ho L, Ishida J, Yamaguchi T, Kimura A, Fukamizu A, Penninger J, Reversade B, Ito H, Imai Y, Kuba K. 5922A novel APJ ligand, ELABELA/Apela/Toddler, protects from pressure overload- and Angiotensin II-induced cardiac hypertrophy and fibrosis. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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21
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Sato C, Ota M, Yano T. Cytotoxic effect caused by the combination of vitamin E homologs on prostate cancer cells. Journal of Nutrition & Intermediary Metabolism 2017. [DOI: 10.1016/j.jnim.2017.04.127] [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] Open
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22
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Nakano T, Sato C, Yamada M, Nakagawa A, Yamamoto H, Fujishima F, Tominaga T, Satomi S, Ohuchi N. A laser-induced pulsed water jet for layer-selective submucosal dissection of the esophagus. Laser Ther 2016; 25:185-191. [PMID: 27853343 DOI: 10.5978/islsm.16-or-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background and aims: Conventional water jet devices have been used for injecting fluid to lift up lesions during endoscopic submucosal dissection or endoscopic mucosal resection procedures. However, these devices cannot dissect the submucosal layer effectively. Here we aim to elucidate the dissection capability of a laser-induced pulsed water jet and to clarify the mechanism of dissection with layer selectivity. Materials (Subjects) and methods: Pulsed water jets were ejected from a stainless nozzle by accelerating saline using the energy of a pulsed holmium: yttrium-aluminum-garnet laser. The impact force (strength) of the jet was evaluated using a force meter. Injection of the pulsed jet into the submucosal layer was documented by high-speed imaging. The physical properties of the swine esophagus were evaluated by measuring the breaking strength. Submucosal dissection of the swine esophagus was performed and the resection bed was evaluated histologically. Results: Submucosal dissection of the esophagus was accomplished at an impact force of 1.11-1.47 N/pulse (laser energy: 1.1-1.5 J/pulse; standoff distance: 60 mm). Histological specimens showed clear dissection at the submucosal layer without thermal injury. The mean static breaking strength of the submucosa (0.11 ± 0.04 MPa) was significantly lower than that of the mucosa (1.32 ± 0.18 MPa), and propria muscle (1.45 ± 0.16 MPa). Conclusions: The pulsed water jet device showed potential for achieving selective submucosal dissection. It could achieve mucosal, submucosal, and muscle layer selectivity owing to the varied breaking strengths.
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Affiliation(s)
- T Nakano
- Division of Advanced Surgical Science and Technology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
| | - C Sato
- Division of Advanced Surgical Science and Technology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
| | - M Yamada
- Division of Advanced Surgical Science and Technology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
| | - A Nakagawa
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
| | - H Yamamoto
- Department of Cardiovascular medicine, Tohoku University Graduate School of medicine, Sendai, Miyagi, 980-8574, Japan
| | - F Fujishima
- Department of Pathology, Tohoku University Hospital, Sendai, Miyagi 980-8574, Japan
| | - T Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
| | - S Satomi
- Division of Advanced Surgical Science and Technology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
| | - N Ohuchi
- Division of Advanced Surgical Science and Technology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8574, Japan
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23
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Sato C, Rai SK, Uga S. Re-evaluation of the formalin-ether sedimentation method for the improvement of parasite egg recovery efficiency. Nepal Med Coll J 2014; 16:20-25. [PMID: 25799805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The formalin-ether sedimentation (FES) method is considered as reliable method of fecal examination for the detection of parasites. In this study, we re-evaluated several aspects of FES such as (i) pretreatment of feces; (ii) filtration of fecal suspensions; (iii) test-tube material and (iv) substitution of ether by other organic solvents as to see an improvement in parasite egg recovery. The egg count was represented by the number of ova detected per 100 μg of sediment. Pre-treatment of feces with formalin (pH 7) increased egg detection rate remarkably compared with original FES method. Use of three layers of gauze dramatically reduced the sediment in the final product, and led to an increase in the number of ova detected. Use of polypropylene test tubes instead of glass test tubes also increased the number of egg detection. None of the organic solvents used to replace the ether produced better results. Based on these findings, we proposed a modified FES procedure. Further, we also compared the parasite positive rate and the number of ova recovered by using original FES and the modified FES procedures by examining 112 fecal samples collected from school children of parasite endemic area in Nepal. Feces collected from Nepal had many parasite ova, and these fecal samples barely displayed false-negative results even by method with low sensitivity. When the mean number of Hemenolepis nana, hookworm, T. trichiura, and A. lumbricoides ova recovered by original FES and the modified FES methods was compared, the values obtained by modified FES were superior (higher). This result suggested that the modified FES is effective and better for the recovery of parasite ova in areas of low-intensity parasitic infection.
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Pasquini JM, Bizzozero O, Sato C, Oteiza P, Soto EF. Neonatal hypothyroidism and early undernutrition affect myelin and myelin precursor membranes in a different way. Int J Dev Neurosci 2014; 1:105-11. [PMID: 24875722 DOI: 10.1016/0736-5748(83)90037-0] [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] [Accepted: 02/02/1983] [Indexed: 11/17/2022] Open
Abstract
The lipid and protein composition as well as the activity of 2'3' cyclic nucleotide 3' phosphohydrolase (CNPH) and the distribution of individual proteins separated by SDS-PAGE were studied in myelin and in a fraction closely related to myelin or assumed to be a precursor membrane of mature myelin (fraction SN4) isolated from 20-day-old rats made hypothyroid at birth or submitted to early malnutrition. In both experimental conditions lipid and protein components were found to be reduced in myelin when data were expressed as mg/g fresh tissue, but the results were close to those obtained in normal controls when data were expressed as mg/mg total protein of each fraction. CNPH activity was normal in myelin but markedly reduced in fraction SN4. Although the results appear to suggest that both experimental conditions produce a reduction in the amount of myelin but no qualitative changes, the data obtained with SDS-PAGE show that the distribution of the various types of proteins present in this fraction and fraction SN4 was abnormal. Myelin and fraction SN4 isolated from malnourished animals displayed a protein profile which was quite similar to that found in fraction SN4 isolated from normal rats, indicating a delay in the process of myelin maturation. The changes in protein composition of myelin and fraction SN4 produced by neonatal hypothyroidism on the other hand differed clearly from those produced by early malnutrition; the ratio small basic protein: large basic protein (SBP:LBP) was found to be reduced in both membrane fractions in the former condition and the protein patterns of myelin and that of fraction SN4 were different, at variance with what was found in the case of malnourished animals. Our findings appear to suggest that the effects of early malnutrition and neonatal hypothyroidism upon myelin and myelin-related membranes are different, and that myelination is more affected in the latter condition.
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Affiliation(s)
- J M Pasquini
- Departamento de Química Biológica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, Buenos Aires, Argentina
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25
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Sasaki S, Tamura H, Watanabe T, Nishiyama S, Wanezaki M, Ishino M, Sato C, Kubota I. Decreased left atrial peak systolic strain evaluated by two-dimensional speckle tracking reflects left atrial appendage dysfunction in sinus rhythm patients with acute ischemic stroke. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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26
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Nishiyama S, Watanabe T, Tamura H, Ishino M, Sasaki S, Wanezaki M, Sato C, Shishido T, Kubota I. Metabolic syndrome deteriorates aortic arch plaque in atherothrombotic stroke. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Wanezaki M, Tamura H, Watanabe T, Sato C, Sasaki S, Ishino M, Nishiyama S, Kubota I. Female patients with non-valvular atrial fibrillation are susceptible to cardioembolic stroke because of their left atrial enlargement. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Kitano M, Kitano S, Ishizu M, Furukawa T, Yoshikawa T, Fujita K, Katashima Y, Sato C, Saito A, Nishioka A, Sekiguchi M, Azuma N, Hashimoto N, Tsunoda S, Matsui K, Iwasaki T, Sano H. SAT0119 Effect of Abatacept on Bone Homeostasis and Osteopontin in Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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30
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Kitano M, Kitano S, Sato C, Nogami M, Morimoto M, Nishioka A, Sekiguchi M, Azuma N, Hashimoto N, Tsunoda S, Matsui K, Iwasaki T, Sano H. AB0557 Effects of tocilizumab on bone homeostasis and DICKKOPF-1 in rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tamaki K, Tamaki N, Kamada Y, Uehara K, Zaha H, Onomura M, Gushimiyagi M, Kurashita K, Miyazato K, Tengan H, Miyara K, Ishida T, Tamaki K, Tamaki N, Kamada Y, Uehara K, Zaha H, Onomura M, Gushimiyagi M, Ueda M, Kurashita K, Miyazato K, Tengan H, Miyara K, Miyaguni T, Nagamine S, Miyagi J, Nomura H, Sunagawa K, Higa J, Sato C, Ishida T. The Challenge to Reduce Breast Cancer Mortality in Okinawa: Consensus of the First Okinawa Breast Oncology Meeting. Jpn J Clin Oncol 2013; 43:208-13. [DOI: 10.1093/jjco/hys217] [Citation(s) in RCA: 3] [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: 01/03/2023] Open
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Sato C, Rodrigues FA, Garcia DM, Vidal CMP, Pashley DH, Tjäderhane L, Carrilho MR, Nascimento FD, Tersariol ILS. Tooth bleaching increases dentinal protease activity. J Dent Res 2012; 92:187-92. [PMID: 23242228 DOI: 10.1177/0022034512470831] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Hydrogen peroxide is an oxidative agent commonly used for dental bleaching procedures. The structural and biochemical responses of enamel, dentin, and pulp tissues to the in vivo bleaching of human (n = 20) premolars were investigated in this study. Atomic force microscopy (AFM) was used to observe enamel nanostructure. The chemical composition of enamel and dentin was analyzed by infrared spectroscopy (FTIR). The enzymatic activities of dental cathepsin B and matrix metalloproteinases (MMPs) were monitored with fluorogenic substrates. The amount of collagen in dentin was measured by emission of collagen autofluorescence with confocal fluorescence microscopy. The presence of Reactive Oxygen Species (ROS) in the pulp was evaluated with a fluorogenic 2',7'-dichlorodihydrofluorescein diacetate (DCFDA) probe. Vital bleaching of teeth significantly altered all tested parameters: AFM images revealed a corrosion of surface enamel nanostructure; FTIR analysis showed a loss of carbonate and proteins from enamel and dentin, along with an increase in the proteolytic activity of cathepsin-B and MMPs; and there was a reduction in the autofluorescence of collagen and an increase in both cathepsin-B activity and ROS in pulp tissues. Together, these results indicate that 35% hydrogen peroxide used in clinical bleaching protocols dramatically alters the structural and biochemical properties of dental hard and soft pulp tissue.
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Affiliation(s)
- C Sato
- Centro Interdisciplinar de Investigação Bioquímica, UMC, Mogi das Cruzes, Brazil
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Fukushi Y, Wada S, Fujino T, Sato C. M470 Withdrawn M471 ANALYSIS OF SINGLE INCISION MULTI-TROCAR LAPAROSCOPIC SURGERY - 79 PATIENTS OF BENIGN OVARIAN TUMOR. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61659-2] [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: 10/27/2022]
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Kodera R, Shikata K, Kataoka HU, Takatsuka T, Miyamoto S, Sasaki M, Kajitani N, Nishishita S, Sarai K, Hirota D, Sato C, Ogawa D, Makino H. Glucagon-like peptide-1 receptor agonist ameliorates renal injury through its anti-inflammatory action without lowering blood glucose level in a rat model of type 1 diabetes. Diabetologia 2011; 54:965-78. [PMID: 21253697 DOI: 10.1007/s00125-010-2028-x] [Citation(s) in RCA: 284] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Accepted: 11/30/2010] [Indexed: 12/11/2022]
Abstract
AIMS/HYPOTHESIS Glucagon-like peptide-1 (GLP-1) has various extra-pancreatic actions, in addition to its enhancement of insulin secretion from pancreatic beta cells. The GLP-1 receptor is produced in kidney tissue. However, the direct effect of GLP-1 on diabetic nephropathy remains unclear. Here we demonstrate that a GLP-1 receptor agonist, exendin-4, exerts renoprotective effects through its anti-inflammatory action via the GLP-1 receptor without lowering blood glucose. METHODS We administered exendin-4 at 10 μg/kg body weight daily for 8 weeks to a streptozotocin-induced rat model of type 1 diabetes and evaluated their urinary albumin excretion, metabolic data, histology and morphometry. We also examined the direct effects of exendin-4 on glomerular endothelial cells and macrophages in vitro. RESULTS Exendin-4 ameliorated albuminuria, glomerular hyperfiltration, glomerular hypertrophy and mesangial matrix expansion in the diabetic rats without changing blood pressure or body weight. Exendin-4 also prevented macrophage infiltration, and decreased protein levels of intercellular adhesion molecule-1 (ICAM-1) and type IV collagen, as well as decreasing oxidative stress and nuclear factor-κB activation in kidney tissue. In addition, we found that the GLP-1 receptor was produced on monocytes/macrophages and glomerular endothelial cells. We demonstrated that in vitro exendin-4 acted directly on the GLP-1 receptor, and attenuated release of pro-inflammatory cytokines from macrophages and ICAM-1 production on glomerular endothelial cells. CONCLUSIONS/INTERPRETATION These results indicate that GLP-1 receptor agonists may prevent disease progression in the early stage of diabetic nephropathy through direct effects on the GLP-1 receptor in kidney tissue.
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Affiliation(s)
- R Kodera
- Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8558, Japan
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Abstract
A mineral medium for studying the growth of Nitrosomonas europaea was developed and examined. The medium was defined in terms of chemical speciation by using chemical equilibrium computer models. The medium significantly increased the metabolic activity of the organisms compared with previously developed media, yielding a specific growth rate as high as 3.0 day (generation time, 5.5 h). The specific growth rate was enhanced by increasing the inoculum and was linearly correlated with the inoculum-to-total-culture volume ratio on a semilog scale. A reproducible growth rate for N. europaea was obtained with this medium under controlled experimental conditions.
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Affiliation(s)
- C Sato
- Civil and Environmental Engineering, The University of Iowa, Iowa City, Iowa 52242
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Robertson J, Bilbao J, Zinman L, Hazrati LN, Tokuhiro S, Sato C, Moreno D, Strome R, Mackenzie IR, Rogaeva E. A novel double mutation in FUS gene causing sporadic ALS. Neurobiol Aging 2010; 32:553.e27-30. [PMID: 20561714 DOI: 10.1016/j.neurobiolaging.2010.05.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Revised: 05/11/2010] [Accepted: 05/16/2010] [Indexed: 10/19/2022]
Abstract
It has been shown that mutations in the Fused in Sarcoma gene (FUS) could explain up to 5% of cases with familial amyotrophic lateral sclerosis (ALS). Our mutation analysis of FUS in a Canadian ALS patient of Chinese origin revealed an unusual novel heterozygous double point mutation (R514S/E516V) confirming that exon 15 is a mutation hot-spot. The substitutions are in cis position to each other and affect highly conserved codons in the RGG-rich region of the FUS protein. The absence of clinical signs of ALS in the relatives of the affected carrier could indicate that this mutation is incompletely penetrant or de novo. The pathologic significance of the R514S/E516V mutation was confirmed by immunohistochemistry. FUS-positive cytoplasmic inclusions were noted in a moderate number in neurons and abundantly in glial cells in the motor cortex and the brainstem. Of interest, a significant number of neuronal and glial FUS-positive inclusions were found in the tegmentum of the brainstem. Importantly, some neurons with inclusions showed retention of the normal nuclear FUS immunostaining.
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Affiliation(s)
- J Robertson
- University of Toronto, Department of Medicine, Centre for Research in Neurodegenerative Diseases, Toronto, ON, Canada
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Inoko E, Nishiura Y, Tanaka H, Takahashi T, Furukawa K, Kitajima K, Sato C. Developmental stage-dependent expression of an 2,8-trisialic acid unit on glycoproteins in mouse brain. Glycobiology 2010; 20:916-28. [DOI: 10.1093/glycob/cwq049] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
Low concentrations (0.11-1.7 microg ml(-1)) of functionalized carbon nanotubes (CNTs), which are multi-walled CNTs modified by amino groups, when added with nerve growth factor (NGF), promoted outgrowth of neuronal neurites in dorsal root ganglion (DRG) neurons and rat pheochromocytoma cell line PC12h cells in culture media. The quantity of active extracellular signal-regulated kinase (ERK) was higher after the addition of both 0.85 microg ml(-1) CNTs and NGF than that with NGF alone. CNTs increased the number of cells with neurite outgrowth in DRG neurons and PC12h cells after the inhibition of the ERK signaling pathway using a mitogen-activated protein kinase (MAPK)/ERK kinase (MEK) inhibitor. Active ERK proteins were detected in MEK inhibitor-treated neurons after the addition of CNTs to the culture medium. These results demonstrate that CNTs may stimulate neurite outgrowth by activation of the ERK signaling pathway. Thus, CNTs are biocompatible and are promising candidates for biological applications and devices.
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Affiliation(s)
- K Matsumoto
- Graduate School of Life Sciences, Toyo University, Ora-gun, Gunma, Japan
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Matsumoto K, Sato C, Whitby R, Shimizu N. Carbon nanotubes stimulate neurite outgrowths of neurons by activation of MAPK/ERK signal transduction. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.068] [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: 11/26/2022]
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Shimada M, Sato C, Hoshi Y, Yamada Y. Estimation of the absorption coefficients of two-layered media by a simple method using spatially and time-resolved reflectances. Phys Med Biol 2009; 54:5057-71. [PMID: 19652290 DOI: 10.1088/0031-9155/54/16/014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Our newly developed method using spatially and time-resolved reflectances can easily estimate the absorption coefficients of each layer in a two-layered medium if the thickness of the upper layer and the reduced scattering coefficients of the two layers are known a priori. We experimentally validated this method using phantoms and examined its possibility of estimating the absorption coefficients of the tissues in human heads. In the case of a homogeneous plastic phantom (polyacetal block), the absorption coefficient estimated by our method agreed well with that obtained by a conventional method. Also, in the case of two-layered phantoms, our method successfully estimated the absorption coefficients of the two layers. Furthermore, the absorption coefficients of the extracerebral and cerebral tissue inside human foreheads were estimated under the assumption that the human heads were two-layered media. It was found that the absorption coefficients of the cerebral tissues were larger than those of the extracerebral tissues.
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Affiliation(s)
- M Shimada
- Department of Integrated Neuroscience, Tokyo Institute of Psychiatry, Kamikitazawa 2-1-8, Setagaya, Tokyo 156-8585, Japan
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Oba A, Sato C, Takahashi K, Futagawa M. No. 2 �Vol. 42, No. 3, pp. 201-217, 2008 �Enhancing facial beauty: diminishing tension-caused forehead wrinkles through upper back massage. Int J Cosmet Sci 2009. [DOI: 10.1111/j.1468-2494.2009.00509_2.x] [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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Zinman L, Liu HN, Sato C, Wakutani Y, Marvelle AF, Moreno D, Morrison KE, Mohlke KL, Bilbao J, Robertson J, Rogaeva E. A mechanism for low penetrance in an ALS family with a novel SOD1 deletion. Neurology 2009; 72:1153-9. [PMID: 19332692 DOI: 10.1212/01.wnl.0000345363.65799.35] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND About 20% of familial amyotrophic lateral sclerosis (ALS) is caused by mutations in SOD1 and is typically transmitted as an autosomal dominant trait. However, due to reduced mutation penetrance, the disease may present in a recessive or sporadic manner. OBJECTIVE To determine the factors responsible for the low penetrance of the SOD1 mutation. METHODS Twelve members of a Canadian ALS family of Filipino origin were recruited for the study. SOD1 was sequenced in the proband. SOD1 expression was assessed by real-time-PCR and immunoblotting. RESULTS The proband was a homozygous carrier of a novel 6 bp deletion in exon 2 (DeltaG27/P28), the pathologic significance of which was confirmed by immunohistochemistry. Eight living family members are heterozygotes and remain unaffected at ages ranging between 48 and 85 years. Haplotype analysis showed that the deletion is a single founder mutation likely common in the Cagayan province (Philippines). The low penetrance of the mutation is explained by the fact that it enhances the naturally occurring alternative splicing of exon 2 of the SOD1 mRNA, leading to reduced transcription of the mutant allele. Indeed, Western blot analysis demonstrated the low level of SOD1 protein in carriers of the DeltaG27/P28 compared to wild-type individuals or a carrier of the A4V SOD1 mutation. CONCLUSION The enhanced splicing of exon 2 acts as a natural knock-down of the mutant SOD1 allele in the Filipino amyotrophic lateral sclerosis (ALS) family. There is a need for careful investigation of splicing isoforms of SOD1 and other ALS genes as factors influencing the severity of disease.
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Affiliation(s)
- L Zinman
- Centre for Neurodegenerative Diseases, Department of Medicine, University of Toronto, 6 Queen's Park Crescent West, Toronto, Ontario, Canada, M5S 3H2
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Yanagawa H, Terao J, Takeda E, Takaishi Y, Kashiwada Y, Kawazoe K, Fushitani S, Tsuchiya K, Yamauchi A, Sato C, Irahara M, Kagawa S. Present status of clinic for complementary and alternative medicine at university hospitals in Japan; a case of Tokushima University Hospital. Eur J Integr Med 2008. [DOI: 10.1016/j.eujim.2008.08.131] [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: 11/28/2022]
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Sato C, Mio K, Maruyama Y, Ogura T. Ion channel structures by single-particle analysis using EM: sodium and TRP channels, IP3 receptor. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308097821] [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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Bruni AC, Momeni P, Bernardi L, Tomaino C, Frangipane F, Elder J, Kawarai T, Sato C, Pradella S, Wakutani Y, Anfossi M, Gallo M, Geracitano S, Costanzo A, Smirne N, Curcio SAM, Mirabelli M, Puccio G, Colao R, Maletta RG, Kertesz A, St George-Hyslop P, Hardy J, Rogaeva E. Heterogeneity within a large kindred with frontotemporal dementia: a novel progranulin mutation. Neurology 2007; 69:140-7. [PMID: 17620546 DOI: 10.1212/01.wnl.0000265220.64396.b4] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [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: 11/15/2022] Open
Abstract
BACKGROUND Frontotemporal dementia (FTD) in several 17q21-linked families was recently explained by truncating mutations in the progranulin gene (GRN). OBJECTIVE To determine the frequency of GRN mutations in a cohort of Caucasian patients with FTD without mutations in known FTD genes. METHODS GRN was sequenced in a series of 78 independent FTD patients including 23 familial subjects. A different Calabrian dataset (109 normal control subjects and 96 FTD patients) was used to establish the frequency of the GRN mutation. RESULTS A novel truncating GRN mutation (c.1145insA) was detected in a proband of an extended consanguineous Calabrian kindred. Segregation analysis of 70 family members revealed 19 heterozygous mutation carriers including 9 patients affected by FTD. The absence of homozygous carriers in a highly consanguineous kindred may indicate that the loss of both GRN alleles might lead to embryonic lethality. An extremely variable age at onset in the mutation carriers (more than five decades apart) is not explained by APOE genotypes or the H1/H2 MAPT haplotypes. Intriguingly, the mutation was excluded in four FTD patients belonging to branches with an autosomal dominant mode of inheritance of FTD, suggesting that another novel FTD gene accounts for the disease in the phenocopies. It is difficult to clinically distinguish phenocopies from GRN mutation carriers, except that language in mutation carriers was more severely compromised. CONCLUSION The current results imply further genetic heterogeneity of frontotemporal dementia, as we detected only one GRN-linked family (about 1%). The value of discovering large kindred includes the possibility of a longitudinal study of GRN mutation carriers.
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Affiliation(s)
- A C Bruni
- Regional Neurogenetic Centre, Lamezia Terme, CZ, Italy.
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Tamura H, Jo R, Kondo A, Yamashita T, Sato C, Tsuji T, Dan K, Ogata K. P090 B7.1 expression on blasts in myelodysplastic syndromes. Leuk Res 2007. [DOI: 10.1016/s0145-2126(07)70160-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sugiyama T, Nakagawa T, Sato C, Fujii T, Mine K, Shimizu K, Murata T, Tagawa T. Subcutaneous administration of lactone form of simvastatin stimulates ectopic osteoinduction by rhBMP-2. Oral Dis 2007; 13:228-33. [PMID: 17305627 DOI: 10.1111/j.1601-0825.2006.01271.x] [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: 11/28/2022]
Abstract
OBJECTIVE To evaluate the effects of various 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors (statins) on ectopic osteoinduction by recombinant human bone morphogenetic protein-2 (rhBMP-2) using different administration methods. MATERIALS AND METHODS Disks containing 5 mug of rhBMP-2 and type I collagen were implanted into the calf muscles of 6-week-old male rats (n = 64). Either the lactone form of simvastatin (SV), open hydroxy-acid form of simvastatin (SVA), cerivastatin (CVA), or vehicle (control) was then administered per orally (PO group) or subcutaneously (SC group) for 20 days. The disks were removed on day 21 after implantation, and ectopic induced bone formation was evaluated by radiographic, histologic, and biochemical analysis. RESULTS Both the projected and radiopaque area on X-ray film, and the calcium content of the SV group in the SC group (SV-SC group) were significantly greater than those in the other SC and PO groups. Alkaline phosphatase activity and tartrate-resistant acid phosphatase activity in the SV-SC group were significantly lower than those in the other SC and PO groups. Histologic examination revealed an increase of ectopic induced bone volume in the SV-SC group. CONCLUSION Subcutaneous administration of SV stimulates ectopic osteoinduction by rhBMP-2 through reduction of bone turnover.
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Affiliation(s)
- T Sugiyama
- Division of Oral and Maxillofacial Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan.
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Isobe C, Abe T, Kikuchi T, Murata T, Sato C, Terayama Y. Cabergoline scavenges peroxynitrite enhanced by l-DOPA therapy in patients with Parkinson's disease. Eur J Neurol 2006; 13:346-50. [PMID: 16643311 DOI: 10.1111/j.1468-1331.2006.01207.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Long-term or high-dose L-DOPA therapy in patients with Parkinson's disease (PD) may accelerate degeneration of dopaminergic neurons, possibly by increasing oxidative stress. To investigate the effects of cabergoline on peroxynitrite-mediated oxidative damage caused by L-DOPA, the concentration of 3-nitrotyrosine in cerebrospinal fluid (CSF) of 18 PD patients was compared with that in 20 normal controls. The concentration of 3-nitrotyrosine in patients following L-DOPA therapy was significantly higher than in untreated PD patients and controls. On the other hand, the concentration in PD patients after cabergoline therapy was significantly lower than in PD patients after L-DOPA therapy alone. These data suggest that cabergoline scavenges peroxynitrite induced by L-DOPA in patients with PD.
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Affiliation(s)
- C Isobe
- Department of Neurology, Iwate Medical University, Morioka, Iwate, Japan.
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Paisán-Ruíz C, Lang AE, Kawarai T, Sato C, Salehi-Rad S, Fisman GK, Al-Khairallah T, St George-Hyslop P, Singleton A, Rogaeva E. LRRK2 gene in Parkinson disease: mutation analysis and case control association study. Neurology 2005; 65:696-700. [PMID: 16157901 DOI: 10.1212/01.wnl.0000167552.79769.b3] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.0] [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: 11/15/2022] Open
Abstract
BACKGROUND In addition to the four well-confirmed genes linked to early-onset Parkinson disease (PD) (SNCA, PARKIN, DJ-1, and PINK1), mutations in the leucine-rich repeat kinase 2 gene (LRRK2) have recently been identified in families with autosomal dominant late-onset PD. OBJECTIVE To perform mutation analysis of LRRK2 in probands of families showing dominant inheritance of PD and to conduct a case control association study to test the hypothesis that common coding variations might be associated with increased susceptibility to PD. METHODS All 51 LRRK2 coding exons were sequenced in 23 probands and the mutation frequencies were evaluated in 180 neurologically normal control subjects. For the association study the authors genotyped four coding LRRK2 polymorphisms in 250 normal control subjects and 121 patients with PD (predominantly white patients of Canadian origin), 84% of whom had age at onset before 50 years and 42% had a positive family history. RESULTS The authors identified three probands with heterozygous LRRK2 mutations: two of them have the known G2019S substitution and one proband has a novel I1371V substitution. Mutation analysis of a large family demonstrated complete segregation of the G2019S with PD. However, there was no association between PD and any of the four polymorphisms at the allelic or genotypic levels (p > 0.17). Furthermore, the authors did not detect a modifying effect for any genotype or of APOE genotypes upon the age at onset in the PD group (p > 0.20). CONCLUSIONS The results support the prior suggestion that LRRK2 mutations cause PD. The disease in the families reported here presents a phenotype indistinguishable from typical PD. All three families demonstrate a very variable age at onset that is not explained by APOE genotypes. The common coding variations in the LRRK2 gene neither constitute strong PD risk factors nor modify the age at onset; however, the possibility of a modest risk effect remains to be assessed in large datasets.
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Affiliation(s)
- C Paisán-Ruíz
- National Institute on Aging, National Institutes of Health, Porter Neuroscience Research Center, Bethesda, MD, USA
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