Publications by authors named "Kamiya Y"

Background: Cold agglutinin disease (CAD) is an autoimmune hemolytic anemia that induces blood coagulation and hemolysis upon exposure to cold temperatures. Strict temperature control is essential to mitigate these effects, especially during surgical procedures where hypothermia is possible.

Case Presentation: A 57-year-old male, 165 cm and 72 kg, diagnosed with CAD, underwent cerebral vascular anastomosis.

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In almost all cancers, the p53 pathway is disabled and cancer cells survive. Hence, it is crucially important to induce cell death independent of p53 in the treatment of cancers. The transcription factor E2F1 is controlled by binding of the tumor suppressor pRB, and induces apoptosis by activating the gene, an upstream activator of p53, when deregulated from pRB by loss of pRB function.

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Aims: Atherogenic dyslipidemia (AD) is regarded as a residual risk of cardiovascular diseases characterized by low high-density lipoprotein cholesterol (HDL-C) and high triglyceride (TG) levels and related to the intracranial stenosis of atheromatous thrombotic brain infarction (ATBI). Further, atherosclerosis is possibly related to another stroke subtype, including cryptogenic stroke (CS). In particular, an aortic complicated lesion (ACL) is a notable embolic source of CS, since recurrence of aortogenic brain embolism is not rare.

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Fibrodysplasia ossificans progressiva (FOP) is an ultra-rare disorder caused by heterozygous pathogenic variants and is characterized by both progressive heterotopic ossification of the soft tissues and congenital malformations of the great toe. In addition to pathological skeletal metamorphosis, patients with FOP experience diverse neurological symptoms such as chronic pain and involuntary movements; however, little is known about the association between FOP and epileptic seizures. We report the case of a young boy with FOP who sustained multiple major fractures due to epileptic loss of consciousness.

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Plant growth is finely tuned by environmental changes, with abscisic acid (ABA) playing a key role in balancing stress tolerance and growth regulation. The target genes of MYB50, which regulate root growth, include genes that respond to ABA; however, the precise role of MYB50 in ABA signaling remains unclear. Therefore, this study aimed to elucidate the function of MYB50 under ABA signaling.

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I grew up with laboratory glassware and microscopes as treasures from a young age. I was a member of the Chemistry Club in junior high school, and when I visited RIKEN with club members, I wished to become an organic chemist in the future. I received my doctoral degree through the study of the spawning inhibitor of starfish.

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Article Synopsis
  • A research protocol outlines a proposed research idea, serving as a formal document submitted for approval from funding agencies, institutions, or journals, which can be particularly challenging for early-career researchers.
  • Key components of a successful research protocol include a specific title, an abstract summarizing the study, an introduction that defines the knowledge gap, a justification for its significance, clear SMART objectives, a detailed methodology, and plans for dissemination, ethics, budgets, and references.
  • This guide aims to provide practical tips and an overview of the necessary steps to help researchers create a compelling and well-structured protocol to secure approval or funding for their studies.
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  • - E2F1 is a transcription factor that plays a dual role in cell growth, promoting both cell proliferation and tumor suppression, particularly when the tumor suppressor pRB is not functioning.
  • - The N-terminal region of E2F1 is crucial for activating tumor suppressor genes, as removing this region significantly reduces its ability to do so.
  • - GTF2H2, a general transcription factor, interacts with the N-terminal region of E2F1 and enhances its tumor suppressor gene activity, while its knockdown negatively impacts this function.
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  • Patients with skeletal dysplasia, such as achondroplasia and osteogenesis imperfecta, experience short stature which impacts their quality of life (QoL), although less research has focused on children compared to adults.
  • The QoLISSY survey, designed for children and adolescents with short stature, was used to evaluate and compare QoL scores among those with different skeletal dysplasias.
  • The study found that while there were no notable differences in age, sex, or height among groups, parents of children with achondroplasia reported lower QoL scores compared to those with osteogenesis imperfecta, with some correlation found between height and QoL scores in specific cases.
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Introduction: Achondroplasia (ACH) is a common skeletal dysplasia associated with short-limbed short stature caused by gain-of-function mutations in the fibroblast growth factor receptor 3 (FGFR3) gene. Meclozine was found to inhibit FGFR3 signaling using a drug repositioning strategy. In some countries, growth hormone (GH) has been employed to ameliorate short stature in children with ACH.

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Background: Tungiasis, an ectoparasitic disease caused by sand fleas, causes suffering to millions of people in the tropics. Although the Kenyan National Policy Guidelines list tungiasis treatments as including disinfectants, flea repellents, and botanical oil, the insufficient knowledge and financial constraints of affected communities have led to neglect and inappropriate self-treatment. Current reports show insignificant progress on educational activities at the community level.

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The oral mucosa is the first line of defense against pathogenic bacteria and plays a vital role in maintaining tolerance to food antigens and commensal bacteria. We used CD11c reporter mice to visualize dendritic cells (DCs), a key immune cell population, in the oral cavity. We identified differences in DC density in each oral tissue region.

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Liver fibrosis is a critical global health challenge, often leading to severe liver diseases without timely intervention. Choline deficiency has been linked to metabolic dysfunction associated steatohepatitis (MASH) and liver fibrosis, suggesting choline supplementation as a potential therapeutic approach. This study aimed to explore the therapeutic potential of choline supplementation in liver fibrosis resolution and its effects on cholesterol homeostasis using a mouse model with induced liver fibrosis.

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We have achieved the enantioselective synthesis of highly strained, substituted ,,,-tetraphenylenes (≤98% ee) via the cationic Rh(I)/()-H-BINAP complex-catalyzed chemo-, regio-, and enantioselective intermolecular cross-[2+2+2] cycloaddition of teraryl diynes with dimethyl acetylenedicarboxylate. X-ray crystallographic analyses demonstrate the highly bent structures of the -substituted benzene moieties, and density functional theory calculations reveal the large local strain of the paraphenylene unit. H nuclear magnetic resonance analyses and theoretical calculations elucidate the stereoisomerism, indicating that the nonrotatable -disubstituted biphenyl structure results in and isomers.

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As the demand for polycarbonate (PC) plastic increases over the years, the development of a chemical recycling system to produce virgin-like-quality monomers is indispensable not only to attain completely sustainable cycles but also to contribute to the decrease in global plastic pollution. Herein, potassium carbonate (KCO) was used as a low-cost, readily available, and highly active solid base catalyst for low-temperature PC methanolysis in the presence of THF as a solvent, producing highly pure and crystalline bisphenol A (BPA) and with a catalytic performance higher than group IIA metal oxides (MgO, CaO, and SrO) and some group IA metal carbonates (NaHCO, KHCO, and NaCO). THF was the best solvent in aiding the reaction owing to it having a similar polar parameter (δ) to that of PC according to Hansen solubility parameters.

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Article Synopsis
  • - Heart failure can reduce blood flow to the brain, potentially affecting recovery after mechanical thrombectomy (MT) in stroke patients, and this study examined the relationship between brain natriuretic peptide (BNP) levels and recovery outcomes.
  • - Data from 169 stroke patients showed that those with favorable outcomes (score of 0-2 on the modified Rankin scale at 3 months) had lower median BNP levels compared to those with unfavorable outcomes, suggesting that higher BNP levels are linked to poorer recovery.
  • - The analysis indicated that patients with BNP levels above 186 pg/mL had a significantly lower rate of favorable outcomes, even when considering other factors like atrial fibrillation, reinforcing the idea that high BNP concentration correlates with
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Kumada cross-coupling reaction is useful for producing biphenyls, where nickel and copper have been widely investigated as catalysts but mainly homogeneous ones. In this study, we investigated ultrasound-assisted-Kumada cross-coupling reaction over the heterogeneous catalysts in which Ni, Cu, or both was immobilized on aminopropylsilane-functionalized-SiO-TiO prepared in the presence of cetyltrimethylammonium bromide (CTAB). The presence of CTAB effectively prevented the particle growth and therefore SiO-TiO fine particles with high surface area (502 m g) were formed.

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Background And Aim: Increased liver fibrosis scores (LFS), such as fibrosis-4 index (FIB-4) or non-alcoholic fatty liver disease fibrosis score (NFS), and fatty liver are known risk factors for severe coronavirus disease 2019 (COVID-19). The purpose of this study was to identify the best scores, which predict the prognosis of COVID-19.

Methods: Participants comprised consecutive Japanese COVID-19 patients admitted to our hospital between February 14, 2020, and April 14, 2021.

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Article Synopsis
  • The study identifies specific host factors, such as TRIM28, TRIM33, EHMT1, and EHMT2, that are crucial for SARS-CoV-2 infection by using CRISPR-Cas9 screening.
  • TRIM28 may help with the formation of viral particles, while TRIM33, EHMT1, and EHMT2 are likely involved in the virus's transcription and replication processes.
  • The compound UNC0642, which inhibits the activity of EHMT1/2, demonstrated significant potential in reducing SARS-CoV-2 growth and disease severity in test models.
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Optimal reduction methods for late-detected developmental dysplasia of the hip (DDH) remain debatable. Gradual reduction (GR) using traction is a safer and more reliable option for late-detected DDH than closed reduction or open reduction with or without preliminary traction. GR using overhead traction, one of the current GR methods, has been indicated for children of walking age up to four years of age, whereas the upper age limit of this method has not yet been determined.

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Article Synopsis
  • Tungiasis, caused by the flea Tunga penetrans, is primarily treated with NYDA, a topical drug not available in Kenya, leading to the use of sodium carbonate in Western Kenya.
  • A study compared the effectiveness of NYDA and 5% sodium carbonate in treating tungiasis in children, revealing a higher percentage of dead fleas after NYDA treatment (87%) compared to sodium carbonate (64%).
  • Results indicated NYDA's superior efficacy and overall safety, with a majority of children preferring NYDA for future treatments, suggesting a need for increased availability of NYDA in Kenya.
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Introduction: While rabies remains a global concern, detailed studies on human rabies, particularly regarding causal animals and the reasons for not receiving postexposure prophylaxis (PEP), are lacking.

Methods: We conducted a 3-year prospective study (October 2019-September 2022) at the Philippines' largest rabies referral center. We interviewed patients with suspected rabies and their families.

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  • The study explores the impact of remimazolam, a new anesthetic, on motor-evoked potentials (MEPs) during general anesthesia in patients undergoing spinal fusion surgery.
  • Ten adult patients were monitored with varying doses of remimazolam to determine whether higher doses affected MEP amplitude.
  • Results indicated no significant difference in MEP amplitude after increasing the dose, suggesting remimazolam may have a minimal impact on these electrical signals in the brain.
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Catalytic methane (CH) combustion is a promising approach to reducing the release of unburned methane in exhaust gas. Here, we report Co-exchanged β zeolite (Coβ) as an efficient catalyst for CH combustion using O. A series of ion-exchanged β zeolites (Co, Ni, Mn, Fe, and Pd) are subjected to the catalytic test, and Coβ exhibits a superior performance in a low-temperature region (<100 °C).

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