Publications by authors named "Yuki Ikeda"

SUMOylation, the modification of proteins with a small ubiquitin-like modifier (SUMO), is known to regulate various cellular events, including cell division. This process is dynamic, with its status depending on the balance between SUMOylation and deSUMOylation. While the regulation of cell division by sentrin-specific protease (SENP) family proteins through deSUMOylation has been investigated, the role of another deSUMOylase, deSUMOylating isopeptidase 1 (DESI1), remains unknown.

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Background: Complication management is crucial in patients receiving mechanical circulatory devices. However, there are limited data on the association between the risks of complications and device type in patients with percutaneous ventricular assist devices (PVAD).

Methods: The Japanese registry for PVAD (J-PVAD) is a nationwide ongoing registry that enrolls consecutive patients with cardiogenic shock treated with PVAD.

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Introduction: The vascular endothelial glycocalyx, crucial for blood vessel integrity and homeostasis, is vulnerable to oxidative stress, leading to endothelial dysfunction, which strongly correlates with cardiovascular disease (CVD). This study investigates the protective effects of rivaroxaban, a factor X inhibitor, on the glycocalyx under oxidative stress condition.

Methods: We examined the impact of rivaroxaban on human umbilical vein endothelial cells exposed to acute and chronic H2O2-induced oxidative stress.

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  • - A pleural effusion is a common issue for patients with systemic lupus erythematosus (SLE) and requires careful diagnosis for proper treatment.
  • - The case discusses a rare occurrence of chylothorax in an SLE patient, which can be tough to manage despite strong immunosuppressive treatments, often leading to poor health and malnutrition due to frequent procedures.
  • - To improve breathing and prevent malnutrition, treatments like pleuro-peritoneal and peritoneal-venous shunts, along with specialized therapies, may be useful.
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  • ARNIs are primarily used for heart failure treatment but have limited approval for hypertension in some countries.
  • A study was conducted on 50 hypertensive patients switching to ARNIs, measuring arterial stiffness with the cardio-ankle vascular index (CAVI) before and after treatment.
  • Results showed significant reductions in systolic and diastolic blood pressure, as well as decreased CAVI, suggesting that ARNIs can improve hypertension and reduce heart strain.
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Balance dysfunction in older patients compromises independence and increases the risk of falls and disability. Arterial stiffness, an important parameter of atherosclerosis, can affect peripheral organs, including the brain, causing balance disorders. The cardio-ankle vascular index (CAVI), measured independently of blood pressure, has attracted attention as an indicator of arterial stiffness.

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We herein report a patient with Lynch-like syndrome in whom a brain tumor (glioblastoma) developed after repeated resection of colorectal cancer. The patient had a significant family history of cancer. Immunohistochemical expression of mismatch repair proteins was decreased in both brain and colon tumors, but no pathogenic variant of the related genes was detected.

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VemP is a secretory protein in the Vibrio species that monitors cellular protein-transport activity through its translation arrest, allowing expression of the downstream secD2-secF2 genes in the same operon, which encode components of the protein translocation machinery. When cellular protein-transport function is fully active, secD2/F2 expression remains repressed as VemP translation arrest is canceled immediately. The VemP arrest cancellation occurs on the SecY/E/G translocon in a late stage in the translocation process and requires both trans factors, SecD/F and PpiD/YfgM, and a cis element, Arg-85 in VemP; however, the detailed molecular mechanism remains elusive.

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  • This study looked at how our brain shows whether we see ourselves or someone else when we watch hand movements in videos.
  • Researchers used brain measurements from college students to find out if they react differently when watching their own hand movements versus others' movements.
  • They found that when students watched themselves in the first-person view, their brain activity changed a lot, but not as much when they watched from the third-person view, suggesting how we see things can change how we feel about ourselves compared to others.
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Background: Pancreatic acinar cell carcinoma (PACC) is a rare pancreatic neoplasm. Recently, molecular analysis revealed that PACC shows a high frequency of the BRCA1/2 mutation and is likely to be considered a cancer associated with hereditary breast and ovarian cancer (HBOC). Hereditary cancers, including HBOC, are characterized by multifocal and/or metachronous tumors.

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Objectives: Unresectable ampullary cancer (AC) is a rare disease entity. The risk factors for recurrent biliary obstruction (RBO) following endoscopic biliary stenting (EBS) for unresectable AC remain unknown. In this study we aimed to evaluate the cumulative RBO rate and to identify risk factors for RBO following palliative EBS in patients with unresectable AC.

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Trichorhinophalangeal syndrome (TRPS) is a genetic disorder caused by point mutations or deletions in the gene-encoding transcription factor TRPS1. TRPS patients display a range of skeletal dysplasias, including reduced jaw size, short stature, and a cone-shaped digit epiphysis. Certain TRPS patients experience early onset coxarthrosis that leads to a devastating drop in their daily activities.

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We examined effects of a visual search task (VST) in virtual reality (VR) with a moving background on spatial cognition and standing balance in left hemiparetic strokes. The VST with background deviation was allocated to Case A. In Case B, the VST without the deviation was performed.

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To measure α-glucosidase activity, rat intestinal acetone powder is commonly used as a source of α-glucosidase, and the mutarotase-glucose oxidase (GOD) methods commonly used to quantitate glucose produced by enzymatic hydrolysis of the substrates. In this study, we compared human Caco-2 cell extracts with rat intestinal acetone powder extracts. We also compared high-performance anion-exchange chromatography with pulsed amperometric detection (HPAE-PAD) with the mutarotase-GOD method.

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Understanding the composition and function of cells constituting tissues and organs is vital for unraveling biological processes. Single-cell analysis has allowed us to move beyond traditional methods of categorizing cell types. This innovative technology allows the transcriptional and epigenetic profiling of numerous individual cells, leading to significant insights into the development, homeostasis, and pathology of various organs and tissues in both animal models and human samples.

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Aims: Non-dilated left ventricular cardiomyopathy (NDLVC) was proposed as a new category of cardiomyopathy that included patients with non-left ventricular (LV) dilatation, LV wall motion abnormality, or LV scar. However, the clinical background and event rates of NDLVC were unclear. The aim of this study was to examine the characteristics and event rates of patients with NDLVC and reduced LV ejection fraction (NDLVC-REF) in comparison with those with dilated cardiomyopathy (DCM).

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  • HIF-PH inhibitors, like vadadustat, have been approved for treating anemia in chronic kidney disease but their effects on heart failure are still being investigated.
  • A study involving 13 heart failure patients with renal anemia showed that starting vadadustat significantly increased hemoglobin levels and decreased certain biomarkers related to heart function after one month.
  • No serious side effects were reported, and there was a notable improvement in the patients' functional status, as fewer experienced severe heart failure symptoms after treatment with vadadustat.
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The relationship between arterial stiffness and oxygen uptake (VO) in patients with acute myocardial infarction (AMI) remains unclear. We aimed to investigate this relationship and factors contributing to VO in patients with AMI. The role of arterial stiffness in cardio-skeletal muscle coupling during exercise was then elucidated.

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Endoscopic ultrasound-guided gallbladder drainage for patients with cholecystitis and high surgical risk is commonly performed by dilating the fistula before inserting the delivery sheath; however, this carries an increased risk of peritonitis. To overcome this problem, we developed a new technique that did not require dilation, using a 0.035-inch stiff guidewire, and retrospectively evaluated the efficacy and safety of this technique.

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Background: Clinical characteristics and the risk of cardiovascular events in patients with cardiac sarcoidosis (CS) according to the age of initial diagnosis are unclear.

Methods: This study is a sub-analysis of the ILLUMINATE-CS registry, which is a retrospective, multicenter registry that enrolled patients with CS between 2001 and 2017. Patients were divided into three groups according to the tertile of age at the time of initial diagnosis of CS.

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Cardiogenic shock is a complex and diverse pathological condition characterized by reduced myocardial contractility. The goal of treatment of cardiogenic shock is to improve abnormal hemodynamics and maintain adequate tissue perfusion in organs. If hypotension and insufficient tissue perfusion persist despite initial therapy, temporary mechanical circulatory support (t-MCS) should be initiated.

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