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The TLR7/9 adaptors TASL and TASL2 mediate IRF5-dependent antiviral responses and autoimmunity in mouse.
Nat Commun
January 2025
Department of Immunobiology, University of Lausanne, Epalinges, Switzerland.
Endosomal nucleic acid sensing by Toll-like receptors (TLRs) is central to antimicrobial immunity and several autoimmune conditions such as systemic lupus erythematosus (SLE). The innate immune adaptor TASL mediates, via the interaction with SLC15A4, the activation of IRF5 downstream of human TLR7, TLR8 and TLR9, but the pathophysiological functions of this axis remain unexplored. Here we show that SLC15A4 deficiency results in a selective block of TLR7/9-induced IRF5 activation, while loss of TASL leads to a strong but incomplete impairment, which depends on the cell type and TLR engaged.
View Article and Find Full Text PDFShort-term oral exposure to nanoplastics does not significantly impact the antiviral immune response of the mouse.
J Hazard Mater
January 2025
Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS), Laval, QC, Canada. Electronic address:
The increasing prevalence of nanoplastics (NPs) in the environment, particularly polystyrene (PS) nanoparticles, raises concerns regarding their potential impact on human and animal health. Given their small size, NPs can cross biological barriers and accumulate in organs, including those critical for immune functions. This study investigates the effects of short-term oral exposure to 100 and 500 nm PS NPs on the adaptive immune responses during viral infections in vivo, using vesicular stomatitis virus (VSV) and lymphocytic choriomeningitis virus (LCMV) as models.
View Article and Find Full Text PDFHearing Loss in COVID-19 Patients: An Audiological Profile of Symptomatic and Asymptomatic COVID-19 Patients in Qatar.
Cureus
December 2024
Geriatrics and Long-Term Care, Rumailah Hospital - Hamad Medical Corporation, Doha, QAT.
Background and objective Viral infections caused by cytomegalovirus, lymphocytic choriomeningitis virus, varicella-zoster virus, herpes simplex type 1 and type 2, rubella, measles, rubeola, HIV, West Nile virus, Lassa virus, and mumps are known to be associated with hearing loss. There have been reports of inner ear involvement in coronavirus disease 2019 (COVID-19) patients but the extent and variations in cochlear involvement of symptomatic and asymptomatic patients has not been adequately described. This study aimed to evaluate the hearing status among symptomatic and asymptomatic COVID-19 patients to address the prospects for routine screening for hearing loss in COVID-19 patients.
View Article and Find Full Text PDFPrion protein modulation of virus-specific T cell differentiation and function during acute viral infection.
Immunohorizons
January 2025
Center for Virus Research, Chao Family Comprehensive Cancer Center, Department of Molecular Biology and Biochemistry, Charlie Dunlop School of Biological Sciences, University of California, Irvine, Irvine, CA, United States.
The differentiation and functionality of virus-specific T cells during acute viral infections are crucial for establishing long-term protective immunity. While numerous molecular regulators impacting T cell responses have been uncovered, the role of cellular prion proteins (PrPc) remains underexplored. Here, we investigated the impact of PrPc deficiency on the differentiation and function of virus-specific T cells using the lymphocytic choriomeningitis virus (LCMV) Armstrong acute infection model.
View Article and Find Full Text PDFPearls & Oy-sters: Recurrent Lyme Neuroborreliosis With Seroreversion in a Patient With Multiple Sclerosis on a B-Cell Depleting Therapy.
Neurology
February 2025
Clinic of Neurology and Neurophysiology, Medical Center, Faculty of Medicine, University of Freiburg, Germany; and.
True seronegativity is extremely rare in Lyme neuroborreliosis (LNB) with reports only in patients with hematological malignancies or under treatment with chemotherapy and B-cell depleting therapies. In these instances, diagnosing LNB can be challenging. We report the case of a 63-year-old patient with 2 independent episodes of LNB.
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