We designed a new genetic tool to detect plasmid transfer under anaerobic and aerobic conditions. The system is based on the T7 RNA polymerase gene and a T7 promoter-driven oxygen-independent green fluorescent protein, evoglow, alone or in combination with red fluorescent protein DsRed. Constructs are available as plasmids and mini-mariner transposons.
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http://dx.doi.org/10.1128/AEM.00226-10 | DOI Listing |
Front Antibiot
April 2024
Transmission, Reservoir and Diversity of Pathogens Unit, Institut Pasteur, Les Abymes, France.
Introduction: This study aimed to understand the origin and to explain the maintenance of extended-spectrum β-lactamase (ESBL) isolated from food-producing animals in a third-generation cephalosporin (3GC)-free farm.
Methods: Culture and molecular approaches were used to test molecules other than 3GC such as antibiotics (tetracycline and oxytetracycline), antiparasitics (ivermectin, flumethrin, fenbendazol, and amitraz), heavy metal [arsenic, HNO, aluminum, HNO, cadmium (CdSO), zinc (ZnCl), copper (CuSO), iron (FeCl), and aluminum (AlSO)], and antioxidant (butylated hydroxytoluene) as sources of selective pressure. Whole-genome sequencing using short read (Illumina™) and long read (Nanopore™) technologies was performed on 34 genomes.
Int J Biol Macromol
January 2025
Center for Protein Studies, Faculty of Biology, University of Havana (UH), 25(th) Street, corner to J Street. Square of Revolution, Havana 10400. Cuba; NanoCancer, Molecular Immunology Center (CIM), 216 Street, corner to 15 Street, Playa, Havana 11600, Cuba. Electronic address:
Gene expression manipulation is pivotal in therapeutic approaches for various diseases. Non-viral delivery systems present a safer alternative to viral vectors, with reduced immunogenicity and toxicity. However, their effectiveness in promoting endosomal escape, a crucial step in gene transfer, remains limited.
View Article and Find Full Text PDFEnviron Int
January 2025
Ineos Oxford Institute for Antimicrobial Research, Department of Biology, University of Oxford, Oxford OX1 3RE, United Kingdom. Electronic address:
Antimicrobial resistance (AMR) and environmental degradation are existential global public health threats. Linking microplastics (MPs) and AMR is particularly concerning as MPs pollution would have significant ramifications on controlling of AMR; however, the effects of MPs on the spread and genetic mechanisms of AMR bacteria remain unclear. Herein, we performed Simonsen end-point conjugation to investigate the impact of four commonly used MPs on transfer of clinically relevant plasmids.
View Article and Find Full Text PDFCurr Gene Ther
January 2025
Research Group Medical Biotechnology & Bioengineering, TH Köln - University of Applied Sciences, Leverkusen, Germany.
Gamma-Retroviral (RVVs) and lentiviral vectors (LVVs) represent indispensable tools in somatic gene therapy, mediating the efficient, stable transfer of therapeutic genes into a variety of human target cells. LVVs, in contrast to RVVs, are capable of stably genetically modifying non-proliferating target cells, making them the superior instrument in cell and gene therapy. To date, the LVV manufacturing process employs human embryonic kidney cells (HEK293) and derivatives thereof transiently transfected with multiple plasmids encoding the required viral vector components.
View Article and Find Full Text PDFNat Commun
January 2025
Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK.
Conjugation plays a major role in dissemination of antimicrobial resistance genes. Following transfer of IncF-like plasmids, recipients become refractory to a second wave of conjugation with the same plasmid via entry (TraS) and surface (TraT) exclusion mechanisms. Here, we show that TraT from the pKpQIL and F plasmids (TraT and TraT) exhibits plasmid surface exclusion specificity.
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