Publications by authors named "Yamashiro K"

AUTS2 syndrome is characterized by intellectual disability and microcephaly, and is often associated with autism spectrum disorder, but the underlying mechanisms, particularly concerning microcephaly, remain incompletely understood. Here, we analyze mice mutated for the transcriptional regulator AUTS2, which recapitulate microcephaly. Their brains exhibit reduced division of intermediate progenitor cells (IPCs), leading to fewer neurons and decreased thickness in the upper-layer cortex.

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Purpose: To compare the effects of bacteriophages (phages) and vancomycin on Enterococcus faecalis-induced biofilms on the intraocular lens.

Methods: E. faecalis strains EF24, GU02, GU03, and phiEF14H1 were used.

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  • Phosphorus binders can be combined for better effects, but their performance might change due to pH levels or other medications.
  • A study assessed how well different phosphorus binders work together, specifically looking at precipitated calcium carbonate (CC), ferric citrate hydrate (FC), lanthanum carbonate hydrate (LC), and sucroferric oxyhydroxide (SO).
  • Results showed that SO maintained a strong adsorption capacity even when mixed with other binders, while combinations of CC + FC and FC + LC had decreased effectiveness due to citrate ions interfering with calcium and lanthanum ions.*
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Purpose: A high-risk patent foramen ovale (PFO) could be the cause of cryptogenic stroke, and an atrial septal aneurysm (ASA) increases the risk of stroke recurrence in cryptogenic stroke patients with a patent foramen ovale (PFO). Factors related to stroke recurrence according to PFO characteristics have not been fully evaluated.

Methods: Data from a multicenter, observational registry of ischemic stroke patients undergoing transesophageal echocardiography were used for this study.

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Background And Purpose: Efficacy of tumor embolization for posterior fossa meningioma is controversial due to the lack of adequate embolization for dangerous feeders. Of these, a meningohypophyseal trunk (MHT) has high therapeutic value despite the high risks associated with embolization.

Materials And Methods: To analyze the utility of preoperative MHT embolization for posterior fossa meningiomas using BCA with dual balloon protection, a single center retrospective record review was performed on eight consecutive patients who underwent preoperative tumor embolization via the MHT for posterior fossa meningiomas between 2020 and 2024.

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  • Robotic magnetic navigation (RMN)-guided catheter ablation (CA) technology has been effectively used for nearly 20 years in treating heart rhythm disorders, showing benefits like greater catheter stability and safety.
  • This consensus paper aims to compile current knowledge and offer guidelines on utilizing RMN-guided CA for conditions like atrial fibrillation (AF) and ventricular arrhythmias (VA).
  • The expert group reviewed literature and shared experiences to create a structured set of recommendations, addressing practical aspects of RMN use in clinical settings for optimal patient care.
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Brain-computer interface (BCI) technology has gained recognition in various fields, including clinical applications, assistive technology, and human-computer interaction research. BCI enables communication, control, and monitoring of the affective/cognitive states of users. Recently, BCI has also found applications in the artistic field, enabling real-time art composition using brain activity signals, and engaging performers, spectators, or an entire audience with brain activity-based artistic environments.

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[Purpose] Compare four quick (approximately 60 s), reliable methods of assessing %body-fat (%BF) among young (Y, 18-34 years), middle-age (M, 35-59 years), and older (O, 60-88 years) healthy-adults. [Participants and Methods] One-hundred-eighty healthy males-and-females were equally (n=30) divided into Y, M, and O age groups to assess %BF. The %BF methods were: 1) Bioelectrical-impedance-Inbody770 (IB)-criterion reference; 2) Body-mass-index (BMI); 3) Abdominal-and-hip circumferences (CIR); and 4) Skinfold (SF).

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  • Acute retinal necrosis (ARN) is a serious eye condition linked to the reactivation of herpesviruses, potentially triggered by COVID-19 infection or vaccination.
  • A 58-year-old Japanese woman developed ARN in her left eye due to herpes simplex virus 2 shortly after receiving her fifth dose of the COVID-19 vaccine, despite having a history of ARN in her right eye.
  • The case highlights the possibility that individuals with previous ARN may face a higher risk of recurrence following COVID-19 vaccination due to viral reactivation.
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The effect of the menstrual cycle on fine motor skills is unclear. This study determined whether the menstrual cycle affected fine motor skills and related neural activities. Nineteen women with regular menstrual cycles were tested for fine motor skills using two types of tasks: grooved pegboard task (GPT), which evaluates motor control with high freedom of movements, and force modulation task (FMT), which evaluates more complex and fine motor control with low freedom of movements.

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We have developed the Rh-catalyzed enantioselective [2+2+2] cycloaddition of homopropargyl enamides (tosylamide-tethered 1,6-enynes) with alkynes to construct tetrahydroindole skeletons found in natural alkaloids and pharmaceuticals. This cycloaddition proceeds at room temperature in high yields and regio- and enantioselectivity with a broad substrate scope. The preparative scale reaction followed by substituent conversion on the nitrogen atom and the diastereoselective [4+2] cycloaddition with singlet O affords hexahydroindole-diols bearing three stereogenic centers and variable substituents on the nitrogen.

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  • The study investigates how whole-hand water flow (WF), a type of repetitive somatosensory stimulation, affects motor memory retention and sensorimotor adaptation, particularly in relation to the primary motor cortex (M1).
  • A total of 68 participants were divided into three groups to undergo different preconditioning protocols before engaging in a visuomotor tracking task, with assessments of cortical excitability taken at various points.
  • Results indicated that while whole-hand WF did not enhance skill acquisition, it led to reduced intracortical inhibition, suggesting that the primary somatosensory cortex (S1) plays a more crucial role in early sensorimotor adaptation than M1.
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This study aimed to present an effective and minimally invasive method for treating prolonged hypotony after PreserFlo MicroShunt (PMS) implantation, which can cause serious complications. A 79-year-old man with primary open-angle glaucoma of the right eye underwent ab interno intraluminal stent insertion for prolonged hypotony after PMS implantation. After making two corneal incisions at the 5 and 8 o'clock positions in the right eye, a viscoelastic material was injected into the anterior chamber.

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  • Spontaneous intracerebral hemorrhage (SICH) is a severe type of stroke, and prior use of warfarin significantly increases the risk of in-hospital mortality compared to not using any antithrombotics.
  • The study analyzed 1,085 patients and found that while warfarin use was linked to higher mortality, the effects of direct oral anticoagulants (DOACs) were less clear and did not show a significant association with increased mortality.
  • The findings suggest that additional measures are needed to address the risks of SICH in patients on oral anticoagulants, especially given that combining antiplatelets with warfarin sharply raises mortality rates.
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  • The cerebellum plays a crucial role in regulating motor, cognitive, social, and emotional functions by interacting with other brain structures to support automatic behaviors and predictive mechanisms across various tasks, including reward-related activities.
  • It encodes important signals related to reward prediction and temporal changes, influenced by chemical changes in catecholamines, which assist in cognitive learning and complex behavior modulation.
  • Recent research highlights the cerebellum's involvement in mood disorders and addiction, as it helps manage reward sensitivity and loss aversion, while also predicting behavioral outcomes based on past experiences, which can affect social interactions and impulse control.
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Rhythmic movement is the fundamental motion dynamics characterized by repetitive patterns. Precisely defining onsets in rhythmic movement is essential for a comprehensive analysis of motor functions. Our study introduces an automated method for detecting rat's forelimb foot-strike onsets using deep learning tools.

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  • Mice in a controlled study learned to self-adjust their light exposure by nose poking, resulting in a free-running circadian rhythm of 24.5 hours.
  • Under self-selected light conditions, their circadian period was about 1 hour longer compared to when kept in constant darkness after standard light cycles.
  • This suggests that in natural settings, mice may have different circadian behaviors compared to those in laboratory settings with enforced light cycles, emphasizing the importance of light control in studying their natural rhythms.
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Microplastics (MP) encompass not only plastic products but also paint particles. Marine microdebris, including MP, was retrieved from five sampling stations spanning Nagasaki-Goto island and was classified into six types, primarily consisting of MP (A), Si-based (B), and Cu-based (C) paint particles. Type-A particles, i.

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