Publications by authors named "Yamagishi J"

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  • * The study focused on SBP3, a protein exported by the parasite, which plays a crucial role in the formation of surface protrusions on infected red blood cells that help the parasite adhere to blood vessel cells.
  • * Knocking down SBP3 resulted in hindered parasite growth, fewer adhesion sites, and fewer protrusions, indicating its essential function for the parasite's survival and interaction with the host's cells.
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  • Canine distemper virus (CDV) causes a serious disease in dogs and wildlife, with notable genetic variation and previous vaccine failures highlighted in earlier studies.
  • This research isolated CDVs from three unvaccinated dogs in Mongolia, confirming they had CD symptoms and died shortly after, thereby emphasizing the virus's impact in the region.
  • Genome sequencing revealed two mixed-breed dogs carried a non-recombinant CDV isolate related to the Asia-1 lineage, while an 18-month-old Samoyed had a different isolate from the Asia-4 lineage, providing valuable data for future disease control and studies in Eurasia and Asia.
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  • * A study measured physical activity levels in 58 patients with cardiovascular disease using an activity meter, revealing that household activities were a major source of physical movement.
  • * The study found relationships between step count, total physical activity, and age, work, and household chores, suggesting that household activities should be considered when assessing physical activity levels in these patients.
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A simple cell model consisting of a catalytic reaction network with intermediate complex formation is numerically studied. As nutrients are depleted, the transition from the exponential growth phase to the growth-arrested dormant phase occurs along with hysteresis and a lag time for growth recovery. This transition is caused by the accumulation of intermediate complexes, leading to the jamming of reactions and the diversification of components.

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Visceral leishmaniasis (VL) is an infectious disease caused by parasitic protozoa of the genus and manifests clinical symptoms such as splenomegaly, hepatomegaly, anemia, and fever. It has previously been shown that B-cell-activating factor (BAFF) is involved in splenomegaly during VL. Although BAFF is known to be expressed by a variety of cells, the mechanism of elevated BAFF expression in VL is not clear.

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Visceral leishmaniasis (VL) is the most severe type of leishmaniasis which is caused by infection of complex. In the BALB/c mouse model of VL, multinucleated giant cells (MGCs) with heavy parasite infection consist of the largest population of hemophagocytes in the spleen of -infected mice, indicating that MGCs provide the parasites a circumstance beneficial for their survival. Although ATP6V0D2 is a demonstrated factor inducing the formation of hemophagocytic MGCs during infection, functions of this protein in shaping the infection outcome in macrophages remain unclear.

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Unlabelled: Historically, antibody reactivity to pathogens and vaccine antigens has been evaluated using serological measurements of antigen-specific antibodies. However, it is difficult to evaluate all antibodies that contribute to various functions in a single assay, such as the measurement of the neutralizing antibody titer. Bulk antibody repertoire analysis using next-generation sequencing is a comprehensive method for analyzing the overall antibody response; however, it is unreliable for estimating antigen-specific antibodies due to individual variation.

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  • - The study investigates the effectiveness of monotherapy with oral antiviral ensitrelvir and the anti-inflammatory corticosteroid methylprednisolone, as well as their combination, in treating hamsters infected with SARS-CoV-2, focusing on timing and therapeutic outcomes.
  • - Results showed that combining ensitrelvir and methylprednisolone significantly improved respiratory health and decreased pneumonia risk, even when treatment started two days post-infection, by reducing lung damage and inflammation.
  • - The findings underscore the potential benefits of using a combination therapy of antiviral and corticosteroid drugs for better lung pathology and inflammatory response management in COVID-19 cases, including those caused by the delta and omicron variants.
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Livestock-associated methicillin-resistant (LA-MRSA) has been widespread globally in pigs and humans for decades. Nasal colonization of LA-MRSA is regarded as an occupational hazard to people who are regularly involved in livestock production. Our previous study suggested pig-to-human transmission caused by LA-MRSA clonal complex (CC) 398, using traditional molecular typing methods.

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  • The study explored how different diets influence the gut microbiome in 11 bird species, finding that those on grain-based diets had more diverse microbiomes compared to those on meat or fish diets.
  • The analysis revealed that the grain-diet group had higher ratios of certain bacteria (like Bacteroidetes and Firmicutes) than the others, indicating that diet significantly shapes gut microbiome composition.
  • In a closer look at white-tailed eagles, those fed different diets showed fluctuations in specific bacteria, demonstrating that even within the same species, diet changes can lead to alterations in gut bacterial composition.
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Molecular assays and capillary electrophoresis sequencing have been used to identify parasites in livestock. The low sample capacity, which increases labor and processing time, is one drawback. Targeted amplicon sequencing (Ampliseq) uses the fast and large sample capacity platform to identify parasites in the target host, overcoming this limitation.

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  • Rotavirus significantly contributes to diarrhea in young children and animals globally, prompting a study on porcine rotavirus in Zambia's pig farms.
  • The research analyzed 148 stool samples, finding a 22.9% prevalence rate for rotavirus, and further genetic testing revealed strains with similarities to both porcine and human rotavirus.
  • The findings suggest potential gene reassortment and interspecies transmission between pigs and humans, advocating for a "One Health" approach to better monitor and control rotavirus in both populations.
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Ovine babesiosis, caused by , is an acute, lethal, and endemic disease worldwide and causes a huge economic loss to animal industry. Pathogen genome sequences can be utilized for selecting diagnostic markers, drug targets, and antigens for vaccine development; however, those for have not been available so far. In this study, we obtained a draft genome sequence for isolated from an infected sheep in Turkey.

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Lysophosphatidic acid (LPA), a bioactive phospholipid, binds to the G protein-coupled LPA receptor on the surfaces of immune cells, to promote progression of fibrosis of the skin and organs through inducing infiltration of immune cells into tissues, chemokine production, inflammatory cytokine production, and fibroblast transformation. Anti-fibrotic effects of LPA blockade have been reported in animal models of scleroderma and scleroderma patients. In the study reported herein, we identified the novel urea compound 5 as a hit compound with LPA1 antagonist activity from our in-house library and synthesized the lead compound TP0541640 (18) by structural transformation utilizing a structure-based drug design (SBDD) approach.

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Background: Babesia caballi is an intraerythrocytic parasite from the phylum Apicomplexa, capable of infecting equids and causing equine piroplasmosis. However, since there is limited genome information available on B. caballi, molecular mechanisms involved in host specificity and pathogenicity of this species have not been fully elucidated yet.

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s Neumann, 1901 is one of the most well-known hard ticks because of its medical and veterinary importance. s transmit a wide range of pathogens among vertebrates, affecting humans and animals in Asia and Oceania. In Japan, the tick species is a major pest of cattle because it can spread a protozoan parasite , which causes theileriosis and produces economic losses to the livestock industry (Yokoyama et al.

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Predicting cellular metabolic states is a central problem in biophysics. Conventional approaches, however, sensitively depend on the microscopic details of individual metabolic systems. In this Letter, we derived a universal linear relationship between the metabolic responses against nutrient conditions and metabolic inhibition, with the aid of a microeconomic theory.

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Bats are of significant interest as reservoirs for various zoonotic viruses with high diversity. During the past two decades, many herpesviruses have been identified in various bats worldwide by genetic approaches, whereas there have been few reports on the isolation of infectious herpesviruses. Herein, we report the prevalence of herpesvirus infection of bats captured in Zambia and genetic characterization of novel gammaherpesviruses isolated from striped leaf-nosed bats ).

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A novel multiplex loop-mediated isothermal amplification (LAMP) method combined with DNA chromatography was developed for the simultaneous detection of three important respiratory disease-causing viruses: severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza A virus, and influenza B virus. Amplification was performed at a constant temperature, and a positive result was confirmed by a visible colored band. An in-house drying protocol with trehalose was used to prepare the dried format multiplex LAMP test.

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We report sequences of the complete linear chromosome and five linear plasmids of the relapsing fever spirochete " Borrelia fainii" Qtaro. The chromosome sequence of 951,861 bp and the 243,291 bp of plasmid sequences were predicted to contain 852 and 239 protein-coding genes, respectively. The predicted total GC content was 28.

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Babesia gibsoni is an intraerythrocytic apicomplexan parasite transmitted by Haemaphysalis longicornis and causes canine babesiosis. Within the tick, the Babesia parasite undergoes sexual conjugation and the sporogony process of its life cycle. To control B.

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Although rabies is endemic in Malawi, there have been no studies in which rabies virus was systematically investigated and characterized in multiple animal hosts in that country. In order to provide molecular epidemiological data on rabies virus in Malawi, 683 suspected rabies case reports from 2008 to 2021 were examined, and 46 (dog = 40, cow = 5, and cat = 1) viable rabies-positive brain samples archived at the Central Veterinary Laboratory (CVL), Lilongwe, Malawi, were analyzed genetically. The results showed an increase in the submission of brain samples from 2008 to 2010, with the highest number of submissions observed in 2020.

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Article Synopsis
  • A blood fluke causing schistosomiasis is found near the Mekong River, and control efforts like drug administration have reduced its prevalence but compromised traditional diagnostic methods.
  • Researchers developed a new serological test using a specific protein (rSmekTPx-1) to improve the diagnosis of human schistosomiasis compared to the standard Kato-Katz method.
  • The new test showed higher sensitivity (89.3%) and specificity (93.3%) compared to an older method (rSjTPx-1), indicating it may be a better option for detecting current infections.
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