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Role of extracellular vesicles in the pathogenesis of mosquito-borne flaviviruses that impact public health.
J Biomed Sci
January 2025
Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), 04510, Mexico City, Mexico.
Mosquito-borne flaviviruses represent a public health challenge due to the high-rate endemic infections, severe clinical outcomes, and the potential risk of emerging global outbreaks. Flavivirus disease pathogenesis converges on cellular factors from vectors and hosts, and their interactions are still unclear. Exosomes and microparticles are extracellular vesicles released from cells that mediate the intercellular communication necessary for maintaining homeostasis; however, they have been shown to be involved in disease establishment and progression.
View Article and Find Full Text PDFSingle-cell and spatiotemporal transcriptomic profiling of brain immune infiltration following Venezuelan equine encephalitis virus infection.
Front Immunol
January 2025
Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA, United States.
Neurotropic alphaviruses such as Venezuelan equine encephalitis virus (VEEV) are critical human pathogens that continually expand to naïve populations and for which there are no licensed vaccines or therapeutics. VEEV is highly infectious via the aerosol route and is a recognized weaponizable biothreat that causes neurological disease in humans. The neuropathology of VEEV has been attributed to an inflammatory immune response in the brain yet the underlying mechanisms and specific immune cell populations involved are not fully elucidated.
View Article and Find Full Text PDFEnzymatic synthesis of reactive RNA probes containing squaramate-linked cytidine or adenosine for bioconjugations and cross-linking with lysine-containing peptides and proteins.
Commun Chem
January 2025
Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Prague, Czech Republic.
Protein-RNA interactions play important biological roles and hence reactive RNA probes for cross-linking with proteins are important tools in their identification and study. To this end, we designed and synthesized 5'-O-triphosphates bearing a reactive squaramate group attached to position 5 of cytidine or position 7 of 7-deazaadenosine and used them as substrates for polymerase synthesis of modified RNA. In vitro transcription with T7 RNA polymerase or primer extension using TGK polymerase was used for synthesis of squaramate-modified RNA probes which underwent covalent bioconjugations with amine-linked fluorophore and lysine-containing peptides and proteins including several viral RNA polymerases or HIV reverse transcriptase.
View Article and Find Full Text PDFA 7-year-old with new-onset seizures, behavior disturbance, and encephalitis.
J Neuroimmunol
December 2024
Division of Pediatric Neurology, Department of Pediatrics, University of Utah School of Medicine, United States of America; Brain and Spine Center, Primary Children's Hospital, Intermountain Healthcare, United States of America.
Refractory seizures are common in pediatric neurology; consideration of whether seizures are acutely symptomatic of an underlying disease process is critical. In this case, a previously healthy 7-year-old patient presented with intractable focal seizures in the setting of a viral prodrome and headache. This case highlights a comprehensive work up of new-onset refractory seizures in a patient with features of encephalitis and describes a diagnostic quandary that ultimately led to a rare unifying diagnosis.
View Article and Find Full Text PDFCerebral Hemorrhage in Varicella-Zoster Virus Encephalitis: A Case Study.
Am J Case Rep
January 2025
Department of Neurology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
BACKGROUND Varicella-zoster virus (VZV) encephalitis is a commonly reported form of encephalitis that clinically manifests as skin lesions, fever, headache, and neuropsychiatric symptoms. We present a case of a patient with VZV encephalitis complicated by cerebral hemorrhagic transformation, characterized by high levels of inflammation and protein in the cerebrospinal fluid. The aim is to highlight the risk of hemorrhagic transformation associated with VZV encephalitis.
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