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The Psu protein of phage satellite P4 inhibits transcription termination factor ρ by forced hyper-oligomerization.
Nat Commun
January 2025
Laboratory of Structural Biochemistry, Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany.
Many bacteriophages modulate host transcription to favor expression of their own genomes. Phage satellite P4 polarity suppression protein, Psu, a building block of the viral capsid, inhibits hexameric transcription termination factor, ρ, by presently unknown mechanisms. Our cryogenic electron microscopy structures of ρ-Psu complexes show that Psu dimers clamp two inactive, open ρ rings and promote their expansion to higher-oligomeric states.
View Article and Find Full Text PDFComparing acute versus AIDS ART initiation on HIV-1 integration sites and clonal expansion.
Signal Transduct Target Ther
January 2025
National Clinical Research Center for Infectious Diseases, The Third People's Hospital of Shenzhen and The Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, 518112, Guangdong Province, China.
Early antiretroviral therapy (ART) initiation is known to limit the establishment of the HIV reservoir, with studies suggesting benefits such as a reduced number of infected cells and a smaller latent reservoir. However, the long-term impact of early ART initiation on the dynamics of the infected cell pool remains unclear, and clinical evidence directly comparing proviral integration site counts between early and late ART initiation is limited. In this study, we used Linear Target Amplification-PCR (LTA-PCR) and Next Generation Sequencing to compare unique integration site (UIS) clonal counts between individuals who initiated ART during acute HIV infection stage (Acute-ART group) and those in the AIDS stage (AIDS-ART group).
View Article and Find Full Text PDFSex hormone-dependent host-microbiome interactions and cardiovascular risk (XCVD): design of a longitudinal multi-omics cohort study.
BMJ Open
January 2025
Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany.
Introduction: Cardiovascular diseases (CVDs) present differently in women and men, influenced by host-microbiome interactions. The roles of sex hormones in CVD outcomes and gut microbiome in modifying these effects are poorly understood. The XCVD study examines gut microbiome mediation of sex hormone effects on CVD risk markers by observing transgender participants undergoing gender-affirming hormone therapy (GAHT), with findings expected to extrapolate to cisgender populations.
View Article and Find Full Text PDFA Novel Microbe, Immunization Deaths, and Vaccination on Trial: BCG and the Lübeck Disaster of 1930.
Am Surg
January 2025
Mercer University School of Medicine, Columbus, GA, USA.
Today's controversies of gain-of-function virological research and mRNA COVID vaccination policies had an antecedent nearly a century ago in an event often referred to as "the Lübeck disaster." From April through September 1930, 77 newborn infants in Lübeck, Germany, died after receiving oral BCG immunizations tainted with active human . The tragedy threatened to end BCG immunizations.
View Article and Find Full Text PDFSerological evidence of Crimean-Congo haemorrhagic fever in domestic animals from eight regions of Namibia.
Acta Trop
January 2025
Dept. of Animal Medicine, Production and Health, University of Padova, Legnaro, viale dell'Università 16, 35020, Italy. Electronic address:
Crimean-Congo haemorrhagic fever (CCHF) is a viral zoonotic disease endemic to regions of Africa, the Balkans, the Middle East, and Asia, with increasing reports of cases in southern Europe. Human transmission occurs primarily through the bite of infected ticks and by body fluids from infected human. Crimean-Congo haemorrhagic fever virus (CCHFV) affects a broad host range, including both domestic and wild vertebrates.
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