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is a cyst-forming apicomplexan parasite and the causal agent of bovine besnoitiosis. During early phase of infection, tachyzoites replicate within host endothelial cells in a host cell cholesterol-dependent process. By applying U18666A treatments, we here evaluated the role of Niemann-Pick type C protein 1 (NPC1) in both, intracellular replication and host cellular cholesterol distribution. Additionally, -driven changes in NPC1 gene transcription were studied by qPCR. Overall, U18666A treatments significantly reduced proliferation and induced cholesterol accumulation in host cytoplasmic dense vesicles. However, NPC1 gene transcription was not affected by infection.
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http://dx.doi.org/10.3389/fvets.2024.1454855 | DOI Listing |
Am J Respir Cell Mol Biol
September 2025
University of Toronto, Interdepartmental Division of Critical Care Medicine, Toronto, Ontario, Canada.
Post-Intensive Care Syndrome (PICS) is a serious condition involving physical weakness, depression, and cognitive impairment that develop during or after an intensive care unit (ICU) stay, often resulting in long-term declines in quality of life. Patients with acute respiratory distress syndrome (ARDS) and severe COVID-19 are at particularly high risk, yet the molecular mechanisms underlying PICS remain poorly understood. Here, we identify impaired Apelin-APJ signaling as a potential contributor to PICS pathogenesis via disruption of inter-organ homeostasis.
View Article and Find Full Text PDFMed Sci (Paris)
September 2025
Département d'ophtalmologie et d'oto-rhino-laryngologie - chirurgie cervico-faciale, Faculté de médecine, Université Laval, Québec, Canada - CUO-Recherche, Médecine régénératrice, Centre de recherche du CHU de Québec - Université Laval, Québec, Canada.
Glaucoma, age-related macular degeneration, and diabetic retinopathy are complex eye diseases that involve inflammation. Several cellular models are developed to study inflammation mechanisms in the posterior segment of the eye. These models, are composed of cells of various origins (human or animal), derived from different tissues (retina, choroid, skin, and umbilical cord) and belonging to different cell types (epithelial, endothelial, vascular, and neuronal).
View Article and Find Full Text PDFPLoS Pathog
September 2025
Department of Virology, Immunology, and Microbiology, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, United States of America.
While human autopsy samples have provided insights into pulmonary immune mechanisms associated with severe viral respiratory diseases, the mechanisms that contribute to a clinically favorable resolution of viral respiratory infections remain unclear due to the lack of proper experimental systems. Using mice co-engrafted with a genetically matched human immune system and fetal lung xenograft (fLX), we mapped the immunological events defining successful resolution of SARS-CoV-2 infection in human lung tissues. Viral infection is rapidly cleared from fLX following a peak of viral replication, histopathological manifestations of lung disease and loss of AT2 program, as reported in human COVID-19 patients.
View Article and Find Full Text PDFmBio
September 2025
The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA.
Unlabelled: Methicillin-resistant (MRSA) is a leading cause of endovascular infections, where interactions with endothelial cells play a critical role in pathogenesis. Gp05, a prophage-encoded protein, has previously been implicated in promoting antibiotic persistence by modulating MRSA cellular physiology and evading neutrophil-mediated killing. In this study, we investigated the role of Gp05 in MRSA-endothelial cell interactions, focusing on its impact on bacterial adhesion, invasion, cytotoxicity, and the host inflammatory response.
View Article and Find Full Text PDFAdv Sci (Weinh)
September 2025
Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China.
Normal tension glaucoma (NTG) is a predominant subset of glaucoma in Asia and is characterized by glaucomatous optic neuropathy in the absence of elevated intraocular pressure. Alterations in retinal blood vessels are reported to be important mechanisms of glaucomatous optic nerve damage. Retinal peripapillary vascular density is assessed in patients with early stage NTG and OPTN (E50K) mutant mice and confirmed a similar reduction in retinal peripapillary vascular density in patients with NTG and model mice.
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