Publications by authors named "Ojima S"

Retrons are bacterial genetic elements that encode a reverse transcriptase and, in combination with toxic effector proteins, can serve as antiphage defense systems. However, the mechanisms of action of most retron effectors, and how phages evade retrons, are not well understood. Here, we show that some phages can evade retrons and other defense systems by producing specific tRNAs.

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serovar Gallinarum biovar Gallinarum (SG) causes fowl typhoid, a notifiable infectious disease in poultry. However, the pathogenic mechanism of SG-induced systemic infection in chickens remains unclear. Thioredoxin reductase (TrxB) is a redox protein crucial for regulating various enzyme activities in serovar, but the role in SG-induced chicken systemic infection has yet to be determined.

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serovar Gallinarum () is an important host-specific pathogen that causes fowl typhoid, a severe systemic, septicemic, and fatal infection, in chickens. causes high morbidity and mortality in chickens and poses a significant burden and economic losses to the poultry industry in many developing countries. However, the virulence factors and mechanisms of -induced systemic infection in chickens remain poorly understood.

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  • Escherichia coli O157 is a harmful strain that can lead to serious health issues like hemolytic-uremic syndrome, prompting research into phage-based detection methods for identifying infections.
  • The study details the creation of a specific phage, vB_Eco4M-7, that targets E. coli O157 with a 68-kb genome, demonstrating effective detection capabilities.
  • This phage successfully identifies all 53 clinical isolates of E. coli O157 while distinguishing them from other similar bacteria, indicating potential for broader applications in detecting and treating pathogenic bacteria.
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O157:H7 is a globally important foodborne pathogen with implications for food safety. Antibiotic treatment for O157 may potentially contribute to the exacerbation of hemolytic uremic syndrome, and the increasing prevalence of antibiotic-resistant strains necessitates the development of new treatment strategies. In this study, the bactericidal effects and resistance development of antibiotic and bacteriophage monotherapy were compared with those of combination therapy against O157.

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  • * This study specifically compared the bactericidal effectiveness of various lytic enzymes, particularly highlighting T1-spanin, which demonstrated the strongest activity against multiple bacterial strains.
  • * A new phage-based technology was developed to deliver the T1-spanin gene into target bacteria, showing potential for creating innovative and effective antimicrobial treatments.
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Objectives: To investigate the usefulness of machine learning (ML) models using pretreatment F-FDG-PET-based radiomic features for predicting adverse clinical events (ACEs) in patients with cardiac sarcoidosis (CS).

Materials And Methods: This retrospective study included 47 patients with CS who underwent F-FDG-PET/CT scan before treatment. The lesions were assigned to the training (n = 38) and testing (n = 9) cohorts.

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Graves' disease is a type of autoimmune hyperthyroidism caused by thyroid-stimulating antibodies (TSAb). The combination of a porcine thyroid cell bioassay and cyclic adenosine monophosphate (cAMP) immunoassay (TSAb-enzyme immunoassay; EIA) is a clinically approved TSAb measurement method. Due to the requirement of multiple procedures and a long assay time of 6 h in the TSAb-EIA, a simplified and rapid assay is desired.

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  • The study examines how uric acid (UA) levels and hyperuricemia relate to developing hypertension over five years, focusing on both men and women without existing cardiometabolic diseases.
  • Data was collected from over 21,000 participants, with results showing higher hypertension incidence among men compared to women, especially related to higher UA quartiles and hyperuricemia.
  • Findings indicate that the impact of UA on hypertension development varies by sex and also depends on the specific blood pressure measurement standards used.
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  • No existing reports link anthropometric indices (like BMI and waist circumference) with hypertension by sex and age in the Japanese population.
  • A study analyzed data from 41,902 individuals aged 30-69 who underwent medical checkups between 2005-2019, with findings showing significant links between several body measurements and hypertension development after five years.
  • Results indicated that BMI, waist circumference, and body roundness index were strong predictors of hypertension in both men and women, while the body shape index was less reliable across all age groups, especially for women.
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  • The study explored the relationship between serum uric acid (SUA) levels and reduced kidney function, particularly focusing on hypouricemia (low SUA levels) and how it correlates with kidney health.
  • A large dataset from Japanese health examinations involving 227,672 patients was analyzed using logistic regression while considering factors like age, body mass index, and various health conditions.
  • It found that both hypouricemia and high SUA were associated with a higher prevalence of reduced kidney function, indicating a J-shaped relationship where extreme SUA levels (both low and high) increased kidney function risk.
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Blood pressure variability is an independent predictor of cardiovascular disease. Defecation status has also been associated with the risk of developing cardiovascular disease. This study aimed to investigate the association between blood pressure variability and defecation status.

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Mpox virus (formerly monkeypox virus [MPXV]) is a neglected zoonotic pathogen that caused a worldwide outbreak in May 2022. Given the lack of an established therapy, the development of an anti-MPXV strategy is of vital importance. To identify drug targets for the development of anti-MPXV agents, we screened a chemical library using an MPXV infection cell assay and found that gemcitabine, trifluridine, and mycophenolic acid (MPA) inhibited MPXV propagation.

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Background: Predicting metabolic syndrome (MetS) is important for identifying high-risk cardiovascular disease individuals and providing preventive interventions. We aimed to develop and validate an equation and a simple MetS score according to the Japanese MetS criteria.

Methods: In total, 54,198 participants (age, 54.

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Chronic kidney disease (CKD) is a risk factor for end-stage renal disease and contributes to increased risk of cardiovascular disease morbidity and mortality. We aimed to develop a risk prediction score and equation for future CKD using health checkup data. This study included 58,423 Japanese participants aged 30-69 years, who were randomly assigned to derivation and validation cohorts at a ratio of 2:1.

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  • Mpox virus (MPXV) outbreak in 2022 prompted research into potential drug candidates for treatment, as existing anti-smallpox drugs' effects on mpox were unclear.
  • A study screened 132 drugs, identifying atovaquone, mefloquine, and molnupiravir as effective against MPXV, with atovaquone showing the most promise by enhancing the effectiveness of the drug tecovirimat.
  • Mathematical models predict that atovaquone could help clear the virus from patients more quickly, suggesting it's a strong candidate for mpox treatment.
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Background: Carotid plaque is a well-known prognostic factor for cardiovascular diseases. It is unclear which risk factors are associated with the transformation of carotid plaque over time. In this longitudinal study, we examined the risk factors related to carotid plaque progression.

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Hypertension is a risk factor for atherosclerosis. Achieving the therapeutic target value of blood pressure (BP) prevents the onset of cardiovascular events; however, it is not clear how antihypertensive drug use and BP control status relate to arterial stiffness. The purpose of this study is to investigate the relationship between BP control status with or without antihypertensive drugs and arterial stiffness.

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Background: To explore the feasibility of short-time-window Ki imaging using a population-based arterial input function (IF) and optimized Bayesian penalized likelihood (BPL) reconstruction as a practical alternative to long-time-window Ki imaging with an individual patient-based IF. Myocardial Ki images were generated from 73 dynamic F-FDG-PET/CT scans of 30 patients with cardiac sarcoidosis. For each dynamic scan, the Ki images were obtained using the IF from each individual patient and a long time window (10-60 min).

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Article Synopsis
  • - The study investigates the relationship between brachial-ankle pulse wave velocity (baPWV) and cardiovascular risk scores (Suita and Framingham) using data from over 25,000 health checkups in Japan.
  • - Results indicated that the Suita score has a stronger correlation with baPWV compared to the Framingham risk score, particularly evident across both genders.
  • - Cutoff values were established for baPWV to identify moderate- and high-risk cardiovascular groups, varying by age and sex, with specific thresholds identified for men and women in different age brackets.
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serovar Gallinarum (. Gallinarum) is a host-specific pathogen causing fowl typhoid, a severe systemic infection in poultry, which leads to substantial economic losses due to high morbidity and mortality in many developing countries. However, less is known about the pathogenic characteristics and mechanism of .

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Body mass index (BMI) and the waist-to-height ratio (WHtR) are widely used anthropometric indices of obesity to predict cardiovascular risks. However, the usefulness of combining WHtR and BMI values to predict hypertension risk by sex has not been well elucidated. This cohort study enrolled 45,921 participants (mean [±SD] age 53.

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Hypertension is a risk factor for cardiovascular disease. We developed a simple scoring method for predicting future hypertension using health checkup data. A total of 41,902 participants aged 30-69 years without baseline hypertension who underwent annual health checkups (mean age, 52.

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