Transmission routes of PARV4, a newly discovered human parvovirus, were investigated by determining frequencies of persistent infections using autopsy samples from different risk groups. Predominantly parenteral routes of transmission were demonstrated by infection restricted to injection drug users and persons with hemophilia and absence of infection in homosexual men with AIDS and low-risk controls.
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http://dx.doi.org/10.3201/eid1309.070428 | DOI Listing |
Int Immunopharmacol
January 2025
Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan; Department of Clinical Laboratory, Chung Shan Medical University Hospital, Taichung 402, Taiwan; Immunology Research Center, Chung Shan Medical University, Taichung 402, Taiwan. Electronic address:
Parvovirus B19 (B19V) is a human pathogen from the Parvoviridae family that primarily targets and replicates in erythroid progenitor cells (EPCs). While its symptoms are typically self-limiting in healthy individuals, B19V can cause or exacerbate autoimmune diseases in vulnerable patients. This review integrates the involvement of B19V in the development and worsening of several autoimmune diseases, including systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), juvenile idiopathic arthritis (JIA), hematological disorders (thalassemia, anemia, and thrombocytopenia), vasculitis, antiphospholipid syndrome (APS), dermatological disease (systemic sclerosis, psoriasis), autoimmune thyroid disease, myocarditis, and myasthenia gravis, and autoinflammatory disease of adult-onset Still's disease (AOSD).
View Article and Find Full Text PDFSubcell Biochem
December 2024
Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM) and Department of Molecular Biology, Universidad Autónoma de Madrid, Madrid, Spain.
Icosahedral viruses exhibit elegant pathways of capsid assembly and maturation regulated by symmetry principles. Assembly is a dynamic process driven by consecutive and genetically programmed morphogenetic interactions between protein subunits. The non-symmetric capsid subunits are gathered by non-covalent contacts and interactions in assembly intermediates, which serve as blocks to build a symmetric capsid.
View Article and Find Full Text PDFVaccine
December 2024
Mucosal Immunoogy Laboratory, Biomedicine Research Unit, Faculty of Higher Studies Iztacala, National Autonomous University of Mexico. Avenida de los Barrios 1, Los Reyes Iztacala, Tlalnepantla, Estado de México 54090, Mexico. Electronic address:
The development of a protective HIV vaccine remains a challenge given the high antigenic diversity and mutational rate of the virus, which leads to viral escape and establishment of reservoirs in the host. Modern antigen design can guide immune responses towards conserved sites, consensus sequences or normally subdominant epitopes, thus enabling the development of broadly neutralizing antibodies and polyfunctional lymphocyte responses. Conventional epitope vaccines can often be impaired by low immunogenicity, a limitation that may be overcome by using a carrier system.
View Article and Find Full Text PDFItal J Pediatr
December 2024
Department of Pediatrics, Santa Maria delle Croci Hospital, AUSL della Romagna, Viale Vincenzo Randi, 5, Ravenna, Ravenna, 48121, RA, Italy.
Parvovirus B19 (B19V) is a significant pathogen responsible for a wide range of clinical manifestations, particularly in children and pregnant women. While B19V is most commonly recognized as the cause of Fifth disease, a mild erythematous illness in children, its clinical impact extends far beyond this condition. B19V can lead to severe complications, including transient aplastic crisis in individuals with chronic hemolytic anemias, arthralgia, and more severe joint diseases.
View Article and Find Full Text PDFAPMIS
January 2025
Department of Pathology, University Hospital of Helsinki and Turku, Helsinki, Finland.
Pleomorphic adenoma (PA) is a benign salivary gland tumour that may recur or undergo malignant transformation (CXPA). Toll-like receptors (TLR) mediate immune responses triggered by various agents such as viruses and are related to tumour formation either by stimulating or suppressing their growth, with variation across different tumour entities. We compared TLR immunohistochemical expression in PA, its recurrent counterparts and CXPA and evaluated the effect of virus presence in these tumours.
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