195 results match your criteria: "Center for Advanced Science and Technology (RCAST)[Affiliation]"

Circadian Rhythms Correlated in DNA Methylation and Gene Expression Identified in Human Blood and Implicated in Psychiatric Disorders.

Am J Med Genet B Neuropsychiatr Genet

January 2025

Department of Psychiatry, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Zhejiang, China.

Article Synopsis
  • Circadian rhythms, which operate on a nearly 24-hour cycle, influence gene expression and DNA methylation patterns in human tissues, including blood.
  • A study analyzed blood samples from eight healthy males to examine the relationship between DNA methylation levels and RNA expression over 24 hours, identifying significant rhythmic patterns in thousands of CpG sites and several genes.
  • Findings indicated a modest negative correlation between the expression of the gene TXNDC5 and nearby DNA methylation, while also revealing that circadian methylation patterns overlap with genetic risk factors linked to schizophrenia and autism spectrum disorders.
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Monomeric, Oligomeric, Polymeric, and Supramolecular Cyclodextrins as Catalysts for Green Chemistry.

Research (Wash D C)

September 2024

Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan.

This review comprehensively covers recent developments of cyclodextrin-mediated chemical transformations for green chemistry. These cyclic oligomers of glucose are nontoxic, eco-friendly, and recyclable to accomplish eminent functions in water. Their most important feature is to form inclusion complexes with reactants, intermediates, and/or catalysts.

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Visualizing the distribution of small-molecule drugs in living cells is an important strategy for developing specific, effective, and minimally toxic drugs. As an alternative to fluorescence imaging using bulky fluorophores or cell fixation, stimulated Raman scattering (SRS) imaging combined with bisarylbutadiyne (BADY) tagging enables the observation of small molecules closer to their native intracellular state. However, there is evidence that the physicochemical properties of BADY-tagged analogues of small-molecule drugs differ significantly from those of their parent drugs, potentially affecting their intracellular distribution.

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Article Synopsis
  • Hepatoblastomas show varied cell types that affect patient outcomes, but the reasons for this diversity are not well understood.
  • Researchers employed a single-cell analysis to explore the molecular factors contributing to these different cell states, revealing a spectrum of differentiation between liver cell types.
  • They discovered that specific genetic subclones within tumors exhibit unique levels of cellular flexibility, with certain subclones being more aggressive and responsive to chemotherapy due to the overexpression of specific genes.
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Background: Glutamatergic function abnormalities have been implicated in the etiology of treatment-resistant schizophrenia (TRS), and the efficacy of clozapine may be attributed to its impact on the glutamate system. Recently, evidence has emerged suggesting the involvement of immune processes and increased prevalence of antineuronal antibodies in TRS. This current study aimed to investigate the levels of multiple anti-glutamate receptor antibodies in TRS and explore the effects of clozapine on these antibody levels.

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Small-cell lung cancer (SCLC) is an aggressive cancer for which immune checkpoint inhibitors (ICI) have had only limited success. Bispecific T-cell engagers are promising therapeutic alternatives for ICI-resistant tumors, but not all patients with SCLC are responsive. Herein, to integrate CD137 costimulatory function into a T-cell engager format and thereby augment therapeutic efficacy, we generated a CD3/CD137 dual-specific Fab and engineered a DLL3-targeted trispecific antibody (DLL3 trispecific).

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The ability of individuals with visual impairment to recognize an obstacle by hearing is called "obstacle sense". This ability is facilitated while they are moving, though the exact reason remains unknown. This study aims to clarify which acoustical factors may contribute to obstacle sense, especially obstacle distance perception.

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Formation of an instantaneous nick for highly efficient adenylation of oligonucleotides by ligase without subsequent jointing.

Chem Commun (Camb)

March 2024

State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299 Sansha Road, Qingdao, P. R. China.

By forming a nick at the adenylation site instantaneously, nucleic acids are efficiently adenylated by T4 DNA ligase. The subsequent ligation is successfully suppressed in terms of rapid conversion of the instantaneous nick to a more stable gap. It is helpful to understand enzymatic ligation dynamics, and the adenylated products can be used for various practical applications.

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Mutational signature, cancer driver genes mutations and transcriptomic subgroups predict hepatoblastoma survival.

Eur J Cancer

March 2024

Centre de Recherche des Cordeliers, Université Paris Cité, Sorbonne Université, Inserm, F-75006 Paris, France; Equipe Labellisée Ligue Nationale Contre le Cancer, Labex Onco-Immunology, Institute du Cancer Paris CARPEM, AP-HP, F-75015 Paris, France; AP-HP, Department of Oncology, Hopital Européen Georges Pompidou, F-75015 Paris, France. Electronic address:

Background: Hepatoblastoma is the most frequent pediatric liver cancer. The current treatments lead to 80% of survival rate at 5 years. In this study, we evaluated the clinical relevance of molecular features to identify patients at risk of chemoresistance, relapse and death of disease.

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In comparison to monolithic perovskite/perovskite double-junction solar cells, a four-terminal spectrum-splitting system is a simple method to obtain a higher power conversion efficiency (PCE) because it has no constraints of unifying the structures of the top and bottom cells. In this work, utilizing the fact that low-bandgap Sn-Pb bottom cells work the best in p-i-n while Pb-based wide-bandgap top cells work better in an n-i-p architecture, a wide-bandgap ( = 1.61 eV) perovskite solar cell with a mesoscopic structure and a narrow-bandgap ( = 1.

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Circular economy strategies for mitigating metals shortages in electric vehicle batteries under China's carbon-neutral target.

J Environ Manage

February 2024

Center for Energy and Environmental Policy Research, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China; School of Management and Economics, Beijing Institute of Technology, Beijing 100081, China; Beijing Key Lab of Energy Economics and Environmental Management, Beijing 100081, China.

Concerns over supply risks of critical metals used in electric vehicle (EV) batteries are frequently underscored as impediments to the widespread development of EVs. With the progress to achieve carbon neutrality by 2060 for China, projecting the critical metals demand for EV batteries and formulating strategies, especially circular economy strategies, to mitigate the risks of demand-supply imbalance in response to potential obstacles are necessary. However, the development scale of EVs in the transport sector to achieve China's carbon neutrality is unclear, and it remains uncertain to what extent circular economy strategies might contribute to the reduction of primary raw materials extraction.

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Aim: To investigate the role of pentraxin 3 (PTX3) in atherosclerotic disease progression and plaque destabilization, as well as in coronary restenosis after directional coronary atherectomy (DCA).

Materials And Methods: PTX3 contents of early and advanced atherosclerotic lesions of the aorta obtained at autopsy were determined by ELISA and Western blot. Also, coronary plaques of patients with acute coronary syndrome (ACS) or stable angina pectoris (SAP) obtained by DCA were analyzed by immunohistochemistry for PTX3.

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G-Quadruplexes in Human Telomere: Structures, Properties, and Applications.

Molecules

December 2023

Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan.

G-quadruplexes, intricate four-stranded structures composed of G-tetrads formed by four guanine bases, are prevalent in both DNA and RNA. Notably, these structures play pivotal roles in human telomeres, contributing to essential cellular functions. Additionally, the existence of DNA:RNA hybrid G-quadruplexes adds a layer of complexity to their structural diversity.

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RNA Oncological Therapeutics: Intracellular Hairpin RNA Assembly Enables MicroRNA-Triggered Anticancer Functionality.

J Am Chem Soc

January 2024

Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.

Article Synopsis
  • RNA therapeutics show promise in targeting different biomolecules, but challenges like poor cancer selectivity and cell penetration have limited their effectiveness.
  • Researchers developed a new oncolytic RNA hairpin pair designed to specifically kill cancer cells that express high levels of microRNA-21 (miR-21).
  • This novel approach demonstrated that the hairpin RNA could act as a cytotoxic amplifier when activated by miR-21, marking a significant advance in RNA-based cancer treatment strategies.
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Ce-based solid-phase catalysts for phosphate hydrolysis as new tools for next-generation nanoarchitectonics.

Sci Technol Adv Mater

September 2023

Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Tokyo, Japan.

This review comprehensively covers synthetic catalysts for the hydrolysis of biorelevant phosphates and pyrophosphates, which bridge between nanoarchitectonics and biology to construct their interdisciplinary hybrids. In the early 1980s, remarkable catalytic activity of Ce ion for phosphate hydrolysis was found. More recently, this finding has been extended to Ce-based solid catalysts (CeO and Ce-based metal-organic frameworks (MOFs)), which are directly compatible with nanoarchitectonics.

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External-quantum-efficiency enhancement in quantum-dot solar cells with a Fabry-Perot light-trapping structure.

Heliyon

August 2023

Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Meguro-ku, Tokyo, 153-8904, Japan.

In this work, we have experimentally investigated the impact of light trapping on the performance of InAs/GaAs quantum dot (QD) solar cells. To increase the amount of absorbed near-infrared photons, we fabricated a thin-film QD solar cell with a backside mirror where the positions of the QD layers were matched with the intensity peaks of one of the Fabry-Perot (FP) resonances in this structure to enable enhanced QD absorption near 1192 nm. We demonstrate that the external quantum efficiency at a given FP resonance wavelength of such an InAs/GaAs-based QD solar cell can be increased by an order of magnitude over solar cells without FP resonance by optimally positioning the QD layers.

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Novel mechanisms of salt-sensitive hypertension.

Kidney Int

October 2023

Department of Internal Medicine, Division of Pharmacology and Vascular Medicine, Erasmus MC, University Medical Center, Rotterdam, Netherlands. Electronic address:

Article Synopsis
  • High dietary sodium is a key lifestyle factor that can be changed to prevent high blood pressure and hypertension.
  • The reasons behind why some individuals are sensitive to salt while others are not remain unclear, although recent research highlights the roles of inflammation, the gut-kidney axis, and epigenetics.
  • The article reviews new types of medications that target salt-sensitive hypertension and concludes that both kidney functions and blood vessel constriction mechanisms are important for managing this condition.
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As a well-explored chalcopyrite material, copper gallium sulfide CGS has been considered a potential material for solar cell absorber layers. However, its photovoltaic attributes still require to be improved. In this research, a novel chalcopyrite material, copper gallium sulfide telluride CGST, has been deposited and verified as a thin film absorber layer to fabricate high-efficiency solar cells by experimental testing and numerical simulations.

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Frailty is an age-related condition characterized by a decline in physical capacity with an increased vulnerability to stressors. During the COVID-19 pandemic, there was considerable progression in frailty in older adults. Therefore, an online frailty check (FC) is required for continuous screening, especially acceptable to older adults.

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Sex differences in the association of treatment-resistant schizophrenia and serum interleukin-6 levels.

BMC Psychiatry

June 2023

Department of Psychiatry, Sir Run-Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China.

Background: Low-grade inflammation and altered inflammatory markers have been observed in treatment-resistant schizophrenia (TRS). Interleukin-6 (IL-6) is one of the pro-inflammatory cytokines linked with TRS and receives increasing attention. Previous studies showed that patients with TRS might have higher IL-6 levels compared with healthy individuals and treatment-responsive patients.

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A deep understanding of the effect of the A-site cation cross-exchange on the hot-carrier relaxation dynamics in perovskite quantum dots (PQDs) has profound implications on the further development of disruptive photovoltaic technologies. In this study, the hot carrier cooling kinetics of pure FAPbI (FA , CH(NH ) ), MAPbI (MA , CH NH ), CsPbI (Cs , Cesium) and alloyed FA MA PbI , FA Cs PbI , and MA Cs PbI QDs are investigated using ultrafast transient absorption (TA) spectroscopy. The lifetimes of the initial fast cooling stage (<1 ps) of all the organic cation-containing PQDs are shorter than those of the CsPbI QDs, as verified by the electron-phonon coupling strength extracted from the temperature-dependent photoluminescence spectra.

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Article Synopsis
  • The study aimed to understand how adverse reactions from COVID-19 vaccinations affect immune responses, focusing on the second and third doses of the vaccine in a large cohort in Japan.
  • Researchers analyzed data from 2,198 participants who received either the Pfizer or Moderna vaccine, looking at their immune levels and reported adverse reactions.
  • Findings showed that participants with more systemic adverse reactions after vaccinations had stronger immune responses, indicating that these reactions could enhance overall immunity and potentially encourage more people to receive a third vaccine.
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Exosome and exosomal contents in schizophrenia.

J Psychiatr Res

July 2023

Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China. Electronic address:

Schizophrenia (SCZ) is a severe mental disorder that affects approximately 1% general population worldwide and poses a considerable burden to society. Despite decades of research, its etiology remains unclear, and diagnosis remains challenging due to its heterogeneous symptoms. Exosomes play a crucial role in intercellular communication, and their contents, including nucleotides, proteins and metabolites, have been linked to various diseases.

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Actions of Thiols, Persulfides, and Polysulfides as Free Radical Scavenging Antioxidants.

Antioxid Redox Signal

October 2023

Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Japan.

The essential roles of thiol compounds as redox signaling mediators and protectors have been established. Recently, the roles of persulfides and polysulfides as mediators involved in numerous physiological processes have been revealed. Recently, it became possible to detect and measure persulfides and polysulfides in human fluids and tissues and their physiological functions, including cellular signaling and protection against oxidative stress, have been reported, but the underlying mechanisms and dynamics remain elusive.

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