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Breaking a barrier: In trans vlsE recombination and genetic manipulation of the native vlsE gene of the Lyme disease pathogen.
PLoS Pathog
January 2025
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, United States of America.
Host-pathogen interactions represent a dynamic evolutionary process, wherein both hosts and pathogens continuously develop complex mechanisms to outmaneuver each other. Borrelia burgdorferi, the Lyme disease pathogen, has evolved an intricate antigenic variation mechanism to evade the host immune response, enabling its dissemination, persistence, and pathogenicity. Despite the discovery of this mechanism over two decades ago, the precise processes, genetic elements, and proteins involved in this system remain largely unknown.
View Article and Find Full Text PDFFunctions of the Bloom Syndrome Helicase N-terminal Intrinsically Disordered Region.
Genetics
January 2025
Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Bloom Syndrome helicase (Blm) is a RecQ family helicase involved in DNA repair, cell-cycle progression, and development. Pathogenic variants in human BLM cause the autosomal recessive disorder Bloom Syndrome, characterized by predisposition to numerous types of cancer. Prior studies of Drosophila Blm mutants lacking helicase activity or protein have shown sensitivity to DNA damaging agents, defects in repairing DNA double-strand breaks (DSBs), female sterility, and improper segregation of chromosomes in meiosis.
View Article and Find Full Text PDFPreclinical evaluation of the potential PARP-imaging probe [carbonyl-C]DPQ.
EJNMMI Radiopharm Chem
January 2025
Division of Nuclear Medicine, Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria.
Background: Poly (ADP-ribose) polymerase (PARP) enzymes are crucial for the repair of DNA single-strand breaks and have become key therapeutic targets in homologous recombination-deficient cancers, including prostate cancer. To enable non-invasive monitoring of PARP-1 expression, several PARP-1-targeting positron emission tomography (PET) tracers have been developed. Here, we aimed to preclinically investigate [carbonyl-C]DPQ as an alternative PARP-1 PET tracer as it features a strongly distinct chemotype compared to the frontrunners [F]FluorThanatrace and [F]PARPi.
View Article and Find Full Text PDFInvestigation of the Presence of Papillomavirus in Bovine Testicles and Determination of γH2AX and Cytochrome C in Testicular Tissues Determined to be Infected.
Vet Med Sci
January 2025
Department of Virology, Sivas Cumhuriyet University Faculty of Veterinary Medicine, Sivas, Türkiye.
This study aimed to detect the presence of bovine papillomavirus (BPV) in the testicular tissue of bulls over 1-year old by immunohistochemical, immunofluorescence and molecular assay targeting methods. In addition, γH2AX and cytochrome c expressions were evaluated by immunohistochemical and immunofluorescent methods in samples positive for BPV agent. In this study, 100 testicular specimens that did not show any macroscopic papilloma findings were collected.
View Article and Find Full Text PDFNonprecious Triple-Atom Catalysts with Ultrahigh Activity for Electrochemical Reduction of Nitrate to Ammonia: A DFT Screening.
ACS Appl Mater Interfaces
January 2025
Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China.
Electrochemical nitrate reduction to ammonia (NORR) is promising to not only tackle environmental issues caused by nitrate but also produce ammonia at room temperatures. However, two critical challenges are the lack of effective electrocatalysts and the understanding of related reaction mechanisms. To overcome these challenges, we employed first-principles calculations to thoroughly study the performance and mechanisms of triple-atom catalysts (TACs) composed of transition metals (including 27 homonuclear TACs and 4 non-noble bimetallic TACs) anchored on N-doped carbon (NC).
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