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Risk factors and prevention of biliary anastomotic complications in adult living donor liver transplantation

World Journal of Gastroenterology 2007年第31期13卷 4236-4241页

作者： Satoshi Yamamoto Yoshinobu Sato Hiroshi Oya hideki nakatsuka Takashi Kobayashi Yoshiaki Hara Takaoki Watanabe Isao Kurosaki Katsuyoshi Hatakeyama Division of Digestive and General Surgery Niigata University Graduate School of Medical and Dental Sciences Niigata Japan

To evaluate risk factors of biliary anastomotic complications （BACs） and outcomes according to type of biliary reconstruction. METHODS： A total of 33 consecutive adult living donor liver transplantation （LDLT） were reviewed, 17 of which had undergone Duct-to-Duct anastomosis （D-D）. The remaining 16 patients received Roux-en-Y anastomosis （R-Y）. The perioperative factors, such as the type of graft and the number of graft bile ducts, were analyzed retrospectively. RESULTS： The overall incidence of BACs was 39.4%. The incidence of BACs was significantly higher in the patients with than without neoadjuvant chemotherapy （71.4% vs 10%, P = 0.050）. There was no significant difference in the incidence of biliary leakage in patients with D-D vs. those with R-Y. The incidence of biliary strictures following the healing of biliary leakage was significantly higher in D-D （60%） than in R-Y （0%）（P = 0.026）. However, the incidence of BACs related bacteremia was significantly higher in R-Y than in D-D （71.4% vs 0%, P = 0.008）. In D-D, use of T-tube stent remarkably reduced the incidence of 8ACs, compared with straight tube stent （0% vs 50%, P = 0.049）. CONCLUSION： Our experience showed an increase of BACs related bacteremia in the patients with R-Y. Therefore, D-D might be a preferred biliary reconstruction. However, the surgical refinement of D-D should be required because of the high incidence of biliary strictures. Use of the T-tube stent might lead to a significant reduction of BACs in D-D.

关键词： Living donor Liver transplantation Biliaryanastomotic complication Duct-to-Duct anastomosis Roux-en-Y anastomosis

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Therapeutic potential of stem cells in subarachnoid hemorrhage

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Neural Regeneration Research 2025年第4期20卷 936-945页

作者： hideki Kanamaru Hidenori Suzuki Department of Neurosurgery Mie University Graduate School of MedicineTsuJapan

Aneurysm rupture can result in subarachnoid hemorrhage,a condition with potentially severe consequences,such as disability and *** the acute stage,early brain injury manifests as intracranial pressure elevation,global cerebral ischemia,acute hydrocephalus,and direct blood–brain contact due to aneurysm *** may subsequently cause delayed cerebral infarction,often with cerebral vasospasm,significantly affecting patient *** complications such as brain volume loss and chronic hydrocephalus can further impact *** the mechanisms of subarachnoid hemorrhage-induced brain injury is paramount for identifying effective *** cell therapy,with its multipotent differentiation capacity and anti-inflammatory effects,has emerged as a promising approach for treating previously deemed incurable *** review focuses on the potential application of stem cells in subarachnoid hemorrhage pathology and explores their role in neurogenesis and as a therapeutic intervention in preclinical and clinical subarachnoid hemorrhage studies.

关键词： delayed cerebral ischemia early brain injury matricellular protein neurogenesis stem cell therapy subarachnoid hemorrhage

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Shared and distinct roles of T peripheral helper and T follicular helper cells in human diseases

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Cellular & Molecular Immunology 2021年第3期18卷 523-527页

作者： Hiroyuki Yoshitomi hideki Ueno Department of Immunology Graduate School of MedicineKyoto UniversitySakyo-kuf Kyoto 606-8501Japan lnstitute for the Advanced Study of Human Biology Kyoto UniversitySakyo-kuKyoto 606-8501Japan Department of Microbiology Icahn School of Medicine at Mount SinaiNew York 10029 NYUSA Global Health and Emerging Pathogens Institute Icahn School of Medicine at Mount SinaiNew York 10029 NYUSA

The interactions of CD4^(+)T cells and B cells are fundamental for the generation of protective antibody responses,as well as for the development of harmful autoimmune *** studies of human tissues and blood samples have established a new subset of CD4^(+)B helper T cells named peripheral helper T(Tph)*** T follicular helper(Tfh)cells,which interact with B cells within lymphoid organs,Tph cells provide help to B cells within inflamed *** cells share many B helper-associated functions with Tfh cells and induce B cell differentiation toward antibody-producing *** differentiation mechanism is also partly shared between Tph and Tfh cells in humans,and both Tfh and Tph cells can be found within the same tissues,including cancer ***,Tph cells display features distinct from those of Tfh cells,such as the expression of chemokine receptors associated with Tph cell localization within inflamed tissues and a low Bd-6/Blimp1 *** that of Tfh cells,current evidence shows that the target of Tph cells is limited to memory B *** this review,we first summarize recent findings on human Tph cells and discuss how Tph and Tfh cells play shared and distinct roles in human diseases.

关键词： peripheral helper T cells T follicular helper cells CXCL13,Autoantibodies autoimmune diseases

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Method to measure tree-ring width,density,elemental composition,and stable carbon and oxygen isotopes using one sample

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Journal of Forestry Research 2024年第3期35卷 167-174页

作者： Chenxi Xu Yaru Zhao Wenling An Qingyu Zhao Yucheng Liu Masaki Sano Takeshi nakatsuka Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029People's Republic of China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044People's Republic of China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049People's Republic of China Graduate School of Environment Studies Nagoya UniversityNagoya 4648601Japan

Tree-ring width(RW),density,elemental com-position,and stable carbon and oxygen isotope(δ^(13)C,δ^(18)O)are widely used as proxies to assess climate change,ecology,and environmental pollution;however,a specific pretreat-ment has been needed for each ***,we developed a method by which each proxy can be measured in the same ***,the sample is polished for ring width *** obtaining the ring width data,the sample is cut to form a 1-mm-thick wood *** sample is then mounted in a vertical sample holder,and gradually scanned by an X-ray ***,the count rates of the fluorescent photons of elements(for chemical characteriza-tion)and a radiographic grayscale image(for wood density)are obtained,*** density and the element content are ***,cellulose is isolated from the 1-mm wood plate by removal of lignin,and *** producing this cellulose plate,cellulose subsamples are separated by knife under the microscope for inter-annual and intra-annual stable carbon and oxygen isotope(δ^(13)C,δ^(18)O)*** on this method,RW,density,elemental composition,δ^(13)C,and δ^(18)O can be measured from the same sample,which reduces sample amount and treatment time,and is helpful for multi-proxy comparison and combination research.

关键词： Tree-ring width Tree-ring density Tree-ring elemental composition Tree-ring stable carbon and oxygenisotopes

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A construction method of matroidal networks

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Science China(Information Sciences) 2012年第11期55卷 2445-2453页

作者： IMAI hideki Faculty of Science and Engineering Chuo University Tokyo 112-8551Japan

This paper discusses the question whether a network-matroid construction can be modified so that all matroid dependencies are re?ected in the *** propose a novel construction method for a matroidal network to address this ***,we investigate some properties of the matroidal network based on our construction *** relations between the matroidal network and its associated matroid are developed through various examples.

关键词： capacity matroid matroidal network network coding

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Estimating reflectance and shape of objects from a single cartoon-shaded image

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Computational Visual Media 2017年第1期3卷 21-31页

作者： hideki Todo Yasushi Yamaguchi Tokyo University of Technology The University of Tokyo

Although many photorealistic relighting methods provide a way to change the illumination of objects in a digital photograph, it is currently difficult to relight digital illustrations having a cartoon shading style. The main difference between photorealistic and cartoon shading styles is that cartoon shading is characterized by soft color quantization and nonlinear color variations that cause noticeable reconstruction errors under a physical reflectance assumption, such as Lambertian reflection. To handle this non-photorealistic shading property, we focus on shading analysis of the most fundamental cartoon shading technique. Based on the color map shading representation, we propose a simple method to determine the input shading as that of a smooth shape with a nonlinear reflectance property. We have conducted simple ground-truth evaluations to compare our results to those obtained by other approaches.

关键词： non-photorealistic rendering cartoon shading relighting quantization

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Potential therapeutic molecular targets for blood-brain barrier disruption after subarachnoid hemorrhage

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Neural Regeneration Research 2019年第7期14卷 1138-1143页

作者： hideki Kanamaru Hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine

Aneurysmal subarachnoid hemorrhage remains serious hemorrhagic stroke with high morbidities and *** rupture causes arterial bleeding-induced mechanical brain tissue injuries and elevated intracranial pressure,followed by global cerebral ***-subarachnoid hemorrhage ischemia,tissue injuries as well as extravasated blood components and the breakdown products activate microglia,astrocytes and Toll-like receptor 4,and disrupt blood-brain barrier associated with the induction of many inflammatory and other *** blood-brain barrier is disrupted,brain tissues are directly exposed to harmful blood contents and immune cells,which aggravate brain injuries ***-brain barrier disruption after subarachnoid hemorrhage may be developed by a variety of mechanisms including endothelial cell apoptosis and disruption of tight junction *** molecules and pathways have been reported to disrupt the blood-brain barrier after subarachnoid hemorrhage,but the exact mechanisms remain *** independent and/or interconnected signaling pathways may be involved in blood-brain barrier disruption after subarachnoid *** review provides recent understandings of the mechanisms and the potential therapeutic targets of blood-brain barrier disruption after subarachnoid hemorrhage.

关键词： blood-brain barrier early brain injury endothelial cell subarachnoid hemorrhage tight junction inflammation matricellular protein Toll-like receptor 4 TLR4

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Early detection and intervention in diabetic gastroparesis:Role of body surface gastric mapping

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World Journal of Gastroenterology 2024年第45期30卷 4836-4838页

作者： hideki Mori Division of Gastroenterology and Hepatology Department of Internal MedicineKeio University School of MedicineTokyo 1608582Japan

Diabetic gastrointestinal neuropathy is a diabetes-related complication,associated with a complex interplay of hyperglycemic damage,autoimmune responses,oxidative stress,gastrointestinal hormones,and vascular *** with diabetes should be monitored and therapeutic intervention introduced to prevent neuropathy due to diabetes prior to“the point of no return”.Determining gastric bioelectrical activity by body surface gastric mapping may be a promising option to monitor diabetic gastrointestinal neuropathy.

关键词： Gastroparesis Body surface gastric mapping Gastric emptying breath test Diabetes Electrogastrography

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Numerical Analysis of Thermal Convections in a Three-dimensional Cavity: Influence of Difference in Approximation Models on Numerical Solutions

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Journal of Thermal Science 2004年第3期13卷 283-288页

作者： Kazuyoshi MATSUZAKI hideki OHBA Mizue MUNEKATA Mechanical Engineering and Materials Science Kumamoto University 2-39-1 Kurokami Kumamoto 860-8555 JapanMechanical Engineering and Materials Science Kumamoto University 2-39-1 Kurokami Kumamoto 860-8555 JapanMechanical Engineering and Materials Science Kumamoto University 2-39-1 Kurokami Kumamoto 860-8555 Japan

In order to develop the practical approximation models suitable to flow fields at low Mach number with large temperature difference, the influence of difference in approximation models on numerical solutions was investigated by solving the natural convection in the 3-D enclosures with vertical sidewalls differentially heated and the heated bottom wall using 3 approximation models, that is Boussinesq approximation, low Mach Number approximation and approximation model proposed by Mlaouah. As results of the simulation, the effects of the differences in the three approximation models on the numerical solutions become clear.

关键词： thermal convection approximation model numerical analysis 3-D cavity.

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Numerical Simulation on Supersonic Flow in High-Velocity Oxy-Fuel Thermal Spray Gun

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Journal of Thermal Science 2006年第1期15卷 65-70页

作者： Hiroshi KATANODA hideki YAMAMOTO Kazuyasu MATSUO The University of Kitakyushu 1-1 Hibikino Wakamatsu-ku Kitakyushu Fukuoka 808-0135 Japan

This paper analyzes the behaviour of coating particles as well as the gas flow both inside and outside of the High-Velocity Oxy-Fuel （HVOF） thermal spray gun by using a quasi-one-dimensional analysis and a numerical simulation. The HVOF gun in the present analysis is an axially symmetric convergent-divergent nozzle with the design Math number of 2.0. From the present analysis, the distributions of veloeity and temperature of the coating particles flying inside and outside of the HVOF gun are predicted. The velocity and temperature of the coating particles at the exit of the gun calculated by the present method agree well with the previous experimental results. Therefore, the present method of calculation is considered to be useful for predicting the HVOF gas and particle flows.

关键词： compressible flow supersonic jet thermal spray HVOF.

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