About 95,000 compounds were screened by the anucleate cell blue assay. Fifty-one of the hit compounds had various structures and showed inhibitory activity against DNA gyrase and/or topoisomerase IV. Moreover, the compounds exhibited antibacterial activity against a fluoroquinolone- and novobiocin-resistant strain of Staphylococcus aureus. The anucleate cell blue assay is therefore a useful tool for finding novel type II topoisomerase inhibitors.
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http://dx.doi.org/10.1128/AAC.50.1.348-350.2006 | DOI Listing |
Biomed Pharmacother
January 2025
Department of Experimental Medicine, Sapienza University of Rome, Rome 00161, Italy. Electronic address:
The abundance and behaviour of all hematopoietic components display daily oscillations, supporting the involvement of circadian clock mechanisms. The daily variations of immune cell functions, such as trafficking between blood and tissues, differentiation, proliferation, and effector capabilities are regulated by complex intrinsic (cell-based) and extrinsic (neuro-hormonal, organism-based) mechanisms. While the role of the transcriptional/translational molecular machinery, driven by a set of well-conserved genes (Clock genes), in nucleated immune cells is increasingly recognized and understood, the presence of non-transcriptional mechanisms remains almost entirely unexplored.
View Article and Find Full Text PDFTransfus Apher Sci
December 2024
Graduate Institute of Biological Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan; International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan. Electronic address:
Platelets are anucleate blood cells traditionally associated with hemostasis but now increasingly recognized for their multifaceted roles in immunity, inflammation, and tissue repair. Advances in platelet proteomics, employing high-throughput techniques such as mass spectrometry, have significantly enhanced our understanding of platelet biology and its clinical implications in transfusion medicine. Platelet proteomics offers a retrospective view of physiological and pathological changes over the platelet's 7-10-day lifespan, making it a unique tool for studying cumulative biological events.
View Article and Find Full Text PDFMol Biol Cell
December 2024
Department of Biomedical Sciences, School of Veterinary Medicine.
Actin is an essential component of the cytoskeleton in every eukaryotic cell. Cytoplasmic β-and γ-actin are over 99% identical to each other at the protein level, but are encoded by different genes and play distinct roles in vivo. Blood cells, especially red blood cells (RBC), contain almost exclusively β-actin, and it has been generally assumed that this bias is dictated by unique suitability of β-actin for RBC cytoskeleton function due to its specific amino acid sequence.
View Article and Find Full Text PDFArterioscler Thromb Vasc Biol
February 2025
Vascular Biology Program, Boston Children's Hospital, MA (J.E.I., C.P., R.H.B.).
Blood platelets are anucleate cells essential for normal blood hemostasis. To maintain a normal platelet count of 150 000 to 400 000 per μL of blood, 10 platelets must be released each day from precursor cells called megakaryocytes. In this review, we aim to provide an overview of platelet production and evaluate the proposed mechanisms of platelet generation.
View Article and Find Full Text PDFJ Thromb Haemost
November 2024
Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada; Division of Haematology/Oncology, Department of Paediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada. Electronic address:
Platelets are small, discoid, anucleate blood cells that play key roles in clotting and other functions involved in health and disease. Platelets are derived from bone marrow-resident megakaryocytes, which undergo a complex developmental process where they increase dramatically in size and produce an abundance of organelles destined for platelets. These organelles include mitochondria, lysosomes, peroxisomes, and 2 unique types of secretory organelles: α- and dense (δ-) granules.
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