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Knowledge and perception of HIV pre-exposure prophylaxis among healthcare workers.
AIDS Care
March 2025
Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, Brazil.
In Brazil, pre-exposure prophylaxis (PrEP) is freely available to individuals at high risk of HIV infection. However, knowledge and perception of PrEP can act as barriers to its access and use. This study evaluated PrEP knowledge and perception among healthcare workers in the Unified Health System in a Brazilian capital.
View Article and Find Full Text PDFInfluenza 5xM2e mRNA lipid nanoparticle vaccine confers broad immunity and significantly enhances the efficacy of inactivated split vaccination when coadministered.
J Immunol
January 2025
Center for Inflammation, Immunity and Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, United States.
Current influenza vaccines are not effective in conferring protection against antigenic variants and pandemics. To improve cross-protection of influenza vaccination, we developed a 5xM2e messenger RNA (mRNA) vaccine encoding the tandem repeat conserved ectodomain (M2e) of ion channel protein M2 derived from human, swine, and avian influenza A viruses. The lipid nanoparticle (LNP)-encapsulated 5xM2e mRNA vaccine was immunogenic, eliciting high levels of M2e-specific IgG antibodies, IFN-γ+ T cells, T follicular helper cells, germinal center phenotypic B cells, and plasma cells.
View Article and Find Full Text PDFPrecise motif and cross-presentation of coronavirus peptides by feline MHC class I: implications for the mild infection of SARS-CoV-2.
J Immunol
January 2025
National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases (NITFID), National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China.
As one of the earliest identified susceptible animals for the SARS-CoV-2, cats are also the vulnerable hosts for feline coronaviruses, ie feline enteric coronavirus (FECV). Here, to understand the cross-presentation of coronavirus-derived peptides by cat major histocompatibility complex molecule feline leucocyte antigen (FLA) class I, unpredictable natural peptide motifs presented by FLA-K*00701 and FLA-E*00301 were identified through peptide elution and further confirmed by the structural determination of the 2 FLA class I molecules. Based on these precise motifs of FLA class I peptides, the atlas of cross-presenting peptides from different coronaviruses in cats were sketched with 3 hotspots in C-terminal half of ORF1ab protein.
View Article and Find Full Text PDFAggregatin is a mitochondrial regulator of MAVS activation to drive innate immunity.
J Immunol
February 2025
Department of Pharmacology and Toxicology, University of Arizona, Tucson, AZ, United States.
Mitochondrial antiviral-signaling protein (MAVS) is a key adapter protein required for inducing type I interferons (IFN-Is) and other antiviral effector molecules. The formation of MAVS aggregates on mitochondria is essential for its activation; however, the regulatory mitochondrial factor that mediates the aggregation process is unknown. Our recent work has identified the protein Aggregatin as a critical seeding factor for β-amyloid peptide aggregation.
View Article and Find Full Text PDFEpidemiology of Coronary Atherosclerosis Among People Living With HIV in Uganda : A Cross-Sectional Study.
Ann Intern Med
March 2025
Massachusetts General Hospital, Boston, Massachusetts; Mbarara University of Science and Technology, Mbarara, Uganda; and Kabwohe Clinical Research Center, Kabwohe, Sheema, Uganda (S.A.).
Background: Data on the prevalence of coronary atherosclerotic disease (CAD) in the African region among people with and without HIV are lacking.
Objective: To estimate the prevalence of CAD in Uganda and determine whether well-controlled HIV infection is associated with increased presence or severity of CAD.
Design: Cross-sectional study.
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