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Impact of Copper(II) and Silver(I) Complexes Containing 1,10-Phenanthroline-5,6-dione on Cellular and Virulence Aspects of Scedosporium apiospermum.
Curr Top Med Chem
January 2025
Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
Background: Scedosporium apiospermum is a multidrug-resistant filamentous fungus that causes localized and disseminated diseases. Our group has previously described that metalbased complexes containing copper(II) or silver(I) ions complexed with 1,10-phenanthroline-5,6- dione (phendione) inhibited the viability of S. apiospermum conidial cells.
View Article and Find Full Text PDFA549 Alveolar Carcinoma Spheroids as a Cytotoxicity Platform for Carboxyl- and Amine-Polyethylene Glycol Gold Nanoparticles.
Pharmacol Res Perspect
February 2025
Department of Pharmacology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa.
Gold nanoparticles (AuNPs) present with unique physicochemical features and potential for functionalization as anticancer agents. Three-dimensional spheroid models can be used to afford greater tissue representation due to their heterogeneous phenotype and complex molecular architecture. This study developed an A549 alveolar carcinoma spheroid model for cytotoxicity assessment and mechanistic evaluation of functionalized AuNPs.
View Article and Find Full Text PDFExploring the effects of lactulose on lung-intestinal tissue-associated factors and the TLR4/NF-κB signaling pathway in COPD rats based on lung-gut axis theory.
Microb Pathog
December 2024
Baotou Medical College, Inner Mongolia University of Science and Technology, Baotou, 014000, China; Department of Gastroenterology, The First Affiliated Hospital of Baotou Medical College, Inner Mongolia University of Science and Technology, Baotou, 014000, China. Electronic address:
Chronic obstructive pulmonary disease (COPD) is a systemic inflammatory disease impacting both the respiratory and gastrointestinal systems, with its pathogenesis closely linked to the lung-gut axis theory. In this study, we established a rat model of COPD using a fumigation method combined with intra-airway administration of lipopolysaccharide (LPS) to investigate the effects of lactulose on lung and intestinal tissues, focusing on related inflammatory markers and the TLR4/NF-κB signaling pathway. We further explored the therapeutic effects and mechanisms of lactulose on the lung-intestinal tissues in COPD rats, aiming to expand its potential application in chronic respiratory diseases.
View Article and Find Full Text PDFAge-related lung changes linked to altered lysosomal protease profile, histology, and ultrastructure.
PLoS One
December 2024
Division of Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria.
Introduction: The aging process is intricately linked to alterations in cellular and tissue structures, with the respiratory system being particularly susceptible to age-related changes. Therefore, this study aimed to profile the activity of proteases using activity-based probes in lung tissues of old and young rats, focusing on the expression levels of different, in particular cathepsins G and X and matrix Metalloproteinases (MMPs). Additionally, the impact on extracellular matrix (ECM) components, particularly fibronectin, in relation to age-related histological and ultrastructural changes in lung tissues was investigated.
View Article and Find Full Text PDFThe distinctive mechanical and structural signatures of residual force enhancement in myofibers.
Proc Natl Acad Sci U S A
December 2024
Institute of Physiology II, University Hospital Muenster, University of Muenster, Muenster 48149, Germany.
In muscle, titin proteins connect myofilaments together and are thought to be critical for contraction, especially during residual force enhancement (RFE) when steady-state force is elevated after an active stretch. We investigated titin's function during contraction using small-angle X-ray diffraction to track structural changes before and after 50% titin cleavage and in the RFE-deficient, titin mutant. We report that the RFE state is structurally distinct from pure isometric contractions, with increased thick filament strain and decreased lattice spacing, most likely caused by elevated titin-based forces.
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