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Synthetic CB1 Cannabinoids Promote Tunneling Nanotube Communication, Cellular Migration, and Epithelial-Mesenchymal Transition in Pancreatic PANC-1 and Colorectal SW-620 Cancer Cell Lines.
Cells
January 2025
Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada.
Metastasizing cancer cells surreptitiously can adapt to metabolic activity during their invasion. By initiating their communications for invasion, cancer cells can reprogram their cellular activities to initiate their proliferation and migration and uniquely counteract metabolic stress during their progression. During this reprogramming process, cancer cells' metabolism and other cellular activities are integrated and mutually regulated by tunneling nanotube communications to alter their specific metabolic functional drivers of tumor growth and progression.
View Article and Find Full Text PDFA Simple and Efficient Stereoselective Synthesis of a 2,3-Difluorosialic acid-based influenza virus neuraminidase inhibitor.
Chemistry
January 2025
Griffith University - Gold Coast Campus, Institute for Biomedicine and Glycomics, Parklands Drive, 4222, Southport, AUSTRALIA.
3-Fluoroneuraminosyl fluorides are invaluable probes for studying the catalytic mechanism of sialidases (neuraminidases), and as sialidase inhibitors. Significantly, when a C-3 equatorial fluorine is installed on a C-4 functionalised N-acylneuraminic acid (Neu)-based template, the compounds are potent and selective inhibitors of both influenza and parainfluenza sialidases, and of virus replication. Typically, the reported syntheses of 3-fluoroneuraminosyl fluorides involve either an enzymatic or a chemical synthesis that have uncontrolled stereoselectivity in the introduction of fluorine at C-3 of Neu and consequently yield a mixture of C-3 ax and C-3 eq fluoro derivatives.
View Article and Find Full Text PDFIncidence of severe illness in pediatric influenza outpatients treated with baloxavir or neuraminidase inhibitors.
J Infect Chemother
January 2025
Global Development Division, Shionogi & Co., Ltd., Osaka, Japan. Electronic address:
Introduction: A single oral dose of baloxavir marboxil, a cap-dependent endonuclease inhibitor, is approved for patients with influenza A or B infection; however, real-world evidence is limited. We evaluated the effectiveness of baloxavir vs neuraminidase inhibitors in reducing the incidence of severe illness in influenza outpatients aged 5-11 years.
Methods: In this retrospective cohort study, we analyzed individual-level data from patients treated with these antivirals, using a large, Japanese health insurance claims database (JMDC).
Antiviral Agents: Structural Basis of Action and Rational Design.
Subcell Biochem
December 2024
Department of Biomedical Sciences, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain.
During the last forty years, significant progress has been made in the development of novel antiviral drugs, mainly crystallizing in the establishment of potent antiretroviral therapies and the approval of drugs eradicating hepatitis C virus infection. Although major targets of antiviral intervention involve intracellular processes required for the synthesis of viral proteins and nucleic acids, a number of inhibitors blocking virus assembly, budding, maturation, entry, or uncoating act on virions or viral capsids. In this review, we focus on the drug discovery process while presenting the currently used methodologies to identify novel antiviral drugs by means of computer-based approaches.
View Article and Find Full Text PDFIn vitro neuraminidase inhibitory concentrations (IC) of four neuraminidase inhibitors in the Japanese 2023-24 season: Comparison with the 2010-11 to 2022-23 seasons.
J Infect Chemother
December 2024
Japan Physicians Association, Tokyo, Japan; Ricerca Clinica Co., Fukuoka, Japan.
Introduction: To assess the susceptibility of epidemic influenza viruses to the four most used neuraminidase inhibitors (NAIs) during the 2023-24 influenza season in Japan, we measured the 50 % inhibitory concentration (IC) of oseltamivir, peramivir, zanamivir, and laninamivir in virus isolates from the sample of 100 patients.
Methods: Viral isolation was done using specimens obtained before and after treatment, with the type/subtype determined by RT-PCR using type- and subtype-specific primers. IC values were determined by a neuraminidase inhibition assay using a fluorescent substrate.
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