4,214 results match your criteria: "Nagasaki University School of Medicine.[Affiliation]"

Recanalization Does Not Always Equate to Reperfusion: No-Reflow Phenomenon After Successful Thrombectomy.

Stroke

January 2025

Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan (N.H., T.H., M.K., H.K., D.I.).

Background: Thrombectomy for acute large vessel occlusion is a well-established treatment for stroke prevention. However, futile recanalization cases, where no-reflow occurs despite successful recanalization, have been reported. This study aimed to assess cerebral hemodynamics immediately after thrombectomy and their relationship with clinical outcomes.

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Tazobactam/ceftolozane (TAZ/CTLZ) and relebactam/imipenem/cilastatin (REL/IPM/CS) are expected to be effective for treating patients with antimicrobial-resistant infections, particularly gram-negative pathogens, but nationwide surveillance of these has not been investigated thoroughly in Japan. Pseudomonas aeruginosa (n=164), Klebsiella pneumoniae (n=141), and Haemophilus influenzae (n=156) isolated from respiratory infected patients in Japan from June 2019 through December 2020 provided by the Japanese Surveillance Committee were used. Antimicrobial susceptibility testing for TAZ/CTLZ, REL/IPM and comparator agents against isolates were carried out by broth microdilution methods according to the Clinical and Laboratory Standards Institute standard.

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FOXO3A Plays a Role in Wound Healing by Regulating Fibroblast Mitochondrial Dynamics.

J Invest Dermatol

November 2024

Pharmaceutical Research and Technology Institute, Kindai University, Higashi-Osaka, Osaka, Japan. Electronic address:

The skin plays a protective role against harmful environmental stress such as UV rays. Therefore, the skin is constantly exposed to potential injuries, and wound healing is a vital process for the survival of all higher organisms. Wound healing is dependent on aging and metabolic status at a whole-body level.

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The cross-sectional morphology of the proximal femoral diaphysis is defined by the anteversion angle.

J Orthop Res

September 2024

Department of Macroscopic Anatomy, Graduate School of Biomedical Science, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan.

Osteoporosis in postmenopausal women is one of the causes of femoral fractures and is prevented by the administration of bisphosphonates. Individual morphologies are considered to increase the risk of atypical fractures associated with long-term administration. To evaluate cortical bone morphology quantitatively, we established a method to measure the distance from the center point of a cross-section to the external and internal borders based on CT images.

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Host restriction factor GBP2 suppresses the replication of the ecotropic Moloney murine leukemia virus (E-MLV) by inhibiting furin protease, which cleaves the viral envelope glycoprotein (Env) into surface (SU) and transmembrane (TM) subunits. We analyzed the impacts of GBP2 on the infection efficiency mediated by MLV Envs of different strains of ecotropic Moloney, polytropic Friend, amphotropic, and xenotropic MLV-related (XMRV) viruses. Interestingly, the Envs of ecotropic Moloney and polytropic Friend MLV were sensitive to the antiviral activity of GBP2, while XMRV and amphotropic Envs showed resistance.

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Post-Transcriptional Induction of the Antiviral Host Factor GILT/IFI30 by Interferon Gamma.

Int J Mol Sci

September 2024

Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan.

Gamma-interferon-inducible lysosomal thiol reductase (GILT) plays pivotal roles in both adaptive and innate immunities. GILT exhibits constitutive expression within antigen-presenting cells, whereas in other cell types, its expression is induced by interferon gamma (IFN-γ). Gaining insights into the precise molecular mechanism governing the induction of GILT protein by IFN-γ is of paramount importance for adaptive and innate immunities.

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Application of single-molecule analysis to singularity phenomenon of cells.

Biophys Physicobiol

May 2024

Laboratory of Single Molecule Biology, Graduate School of Frontier Biosciences, Osaka University, Osaka 565-0871, Japan.

Single-molecule imaging in living cells is an effective tool for elucidating the mechanisms of cellular phenomena at the molecular level. However, the analysis was not designed for throughput and requires high expertise, preventing it from reaching large scale, which is necessary when searching for rare cells that induce singularity phenomena. To overcome this limitation, we have automated the imaging procedures by combining our own focusing device, artificial intelligence, and robotics.

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Development of a highly sensitive platform for protein-protein interaction detection and regulation of T cell function.

Proc Natl Acad Sci U S A

August 2024

Department of Forensic Pathology and Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8523, Japan.

Article Synopsis
  • * The IFNARRS system is significantly more sensitive than the popular NanoBiT system for detecting these interactions and can identify low levels of cytokines like IFNγ or IL-2.
  • * This system can also detect other cytokines by using extracellular domains from their respective receptors, enhancing cell responses to signals from activated T cells.
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The Ty1 retrotransposon harbors a DNA region that performs dual functions as both a gene silencing and chromatin insulator.

Sci Rep

July 2024

Microbial Physiology Laboratory, Department of Gene Function and Phenomics, National Institute of Genetics, 1,111 Yata, Mishima, Shizuoka, 411-8540, Japan.

In various eukaryotic kingdoms, long terminal repeat (LTR) retrotransposons repress transcription by infiltrating heterochromatin generated within their elements. In contrast, the budding yeast LTR retrotransposon Ty1 does not itself undergo transcriptional repression, although it is capable of repressing the transcription of the inserted genes within it. In this study, we identified a DNA region within Ty1 that exerts its silencing effect via sequence orientation.

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Background: Pulmonary artery periadventitial hematoma (PAPH) with aortic dissection (AD) is a rare condition but has been reported to correlate with prognosis. However, there are few cases of PAPH, and the relationship with computed tomography (CT) findings of AD are unknown. This study aimed to evaluate CT findings and early prognosis in patients with PAPH in AD.

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Quantitative evaluation of pulmonary hypertension using 4D flow MRI: A retrospective study.

Heliyon

May 2024

Department of Radiology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.

Background: Pulmonary hypertension (PH) is a severe vascular disorder that may affect 50 % of patients with heart failure. Currently, right-sided heart catheterization is required to definitively diagnose PH. However, this method is invasive and thus may not be appropriate for repeated, long-term monitoring of PH patients.

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Influence of Adipokines on Metabolic Dysfunction and Aging.

Biomedicines

April 2024

Department of Pathology, Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.

Currently, 30% of the global population is overweight or obese, with projections from the World Obesity Federation suggesting that this figure will surpass 50% by 2035. Adipose tissue dysfunction, a primary characteristic of obesity, is closely associated with an increased risk of metabolic abnormalities, such as hypertension, hyperglycemia, and dyslipidemia, collectively termed metabolic syndrome. In particular, visceral fat accretion is considered as a hallmark of aging and is strongly linked to higher mortality rates in humans.

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Mutations in the SNCA gene, which encodes α-synuclein (α-syn), play a key role in the development of genetic Parkinson's disease (PD). α-Syn is a major component of Lewy bodies in PD and glial cytoplasmic inclusions in multiple system atrophy (MSA). Rapid eye movement sleep behavior disorder patients often progress to PD, dementia with Lewy bodies, or MSA, which are collectively known as α-synucleinopathies.

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The moderate restriction of dietary energy intake (dietary restriction: DR) extends the lifespan and health span of various laboratory animals, suggesting that it delays the aging process inherent in many animal species. Attenuated growth hormone and insulin-like growth factor-1 (IGF-1) signaling caused by mutations also increases the lifespan of mice, even those allowed to feed freely. In nematodes, the Daf16, mammalian Forkhead box O (FoxO) transcription factor, was shown to be required for lifespan extension in response to reduced IGF-1 signaling.

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Article Synopsis
  • A 62-year-old man with cancer had surgery to remove parts of his pancreas and bile duct, but after eight years, a new problem appeared in his liver.
  • He underwent procedures to help clear blockages and was treated for severe liver infections, but during a special endoscopic procedure, he became very ill and his heart stopped.
  • Doctors later found air in his body that caused complications, and despite treatment in the hospital, he passed away 114 days later due to his worsening health.
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Moderate restriction of dietary energy intake, referred to here as dietary restriction (DR), delays aging and extends lifespan in experimental animals compared with a diet of ad libitum feeding (AL) control animals. Basic knowledge of the mechanisms underlying the effects of DR could be applicable to extending the healthspan in humans. This review highlights the importance of forkhead box O (FoxO) transcription factors downstream of the growth hormone-insulin-like growth factor 1 signaling in the effects of DR.

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Purpose: The aim of this study was to evaluate the utility of cancer detection rate (CDR) and abnormal interpretation rate (AIR) in prostate MRI for patients with low-grade prostate cancer (PCa).

Methods: This three-center retrospective study included patients who underwent prostate MRI from 2017 to 2021 with known low-grade PCa (Gleason score 6) without prior treatment. Patient-level highest Prostate Imaging Reporting & Data System (PI-RADS®) score and pathologic diagnosis within 1 year after MRI were used to evaluate the diagnostic performance of prostate MRI in detecting clinically significant PCa (csPCa; Gleason score ≥ 7).

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Purpose: To report cancer detection rate (CDR) and abnormal interpretation rate (AIR) in prostate MRI performed for clinical suspicion of prostate cancer (PCa).

Materials And Methods: This retrospective single-institution, three-center study included patients who underwent MRI for clinical suspicion of PCa between 2017 and 2021. Patients with known PCa were excluded.

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Introduction: Infection and mortality rates caused by the coronavirus infectious disease 2019 (COVID-19) pandemic were high. However, the influence of the COVID-19 pandemic on the clinical burden in medical facilities remains to be clarified in Japan.

Materials And Methods: This study used a questionnaire-based web survey to clarify how the COVID-19 pandemic affected infectious disease practice and infection control.

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The transcription factor NRF1 (NFE2L1) activates aggrephagy by inducing p62 and GABARAPL1 after proteasome inhibition to maintain proteostasis.

Sci Rep

September 2023

Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan.

The ubiquitin‒proteasome system (UPS) and autophagy are the two primary cellular pathways of misfolded or damaged protein degradation that maintain cellular proteostasis. When the proteasome is dysfunctional, cells compensate for impaired protein clearance by activating aggrephagy, a type of selective autophagy, to eliminate ubiquitinated protein aggregates; however, the molecular mechanisms by which impaired proteasome function activates aggrephagy remain poorly understood. Here, we demonstrate that activation of aggrephagy is transcriptionally induced by the transcription factor NRF1 (NFE2L1) in response to proteasome dysfunction.

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Article Synopsis
  • * The study focused on ALDH1L1, an enzyme that breaks down 10-fTHF, which is often less active in hepatocellular carcinoma (HCC), leading to altered serine and glycine levels and increased accumulation of a dnPS intermediate called ZMP.
  • * HCC cells with higher ALDH1L1 expression showed decreased sensitivity to ZMP and better mitochondrial function, suggesting that low ALDH1L1 levels could make cells more responsive
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