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Executioner caspases degrade essential mediators of pathogen-host interactions to inhibit growth of intracellular Listeria monocytogenes.
Cell Death Dis
January 2025
Faculty of Science and Medicine, Department of Oncology, Microbiology and Immunology, Anatomy unit, University of Fribourg, CH-1700, Fribourg, Switzerland.
Cell death mediated by executioner caspases is essential during organ development and for organismal homeostasis. The mechanistic role of activated executioner caspases in antibacterial defense during infections with intracellular bacteria, such as Listeria monocytogenes, remains elusive. Cell death upon intracellular bacterial infections is considered altruistic to deprive the pathogens of their protective niche.
View Article and Find Full Text PDFBiological studies reveal the role of trpA gene in biofilm formation, motility, hemolysis and virulence in Vibrio anguillarum.
Microb Pathog
January 2025
Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China; Marine Biomedical Science and Technology Innovation Platform of Lin-gang Special Area, Shanghai 201306, China. Electronic address:
Vibrio anguillarum is a pathogen responsible for vibriosis in aquaculture animals. The formation of bacterial biofilm contributes to infections and increases resistance to antibiotics. Tryptophanase and its substrate tryptophan have been recognized as signal molecules regulating bacterial biofilm formation.
View Article and Find Full Text PDFTheoretical Study of Sphingomyelinases from and Sheds Light on the Evolution of Enzymes Needed for Survival and Colonization.
Pathogens
January 2025
Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta s/n, Guanajuato 36050, Mexico.
The path to survival for pathogenic organisms is not straightforward. Pathogens require a set of enzymes for tissue damage generation and to obtain nourishment, as well as a toolbox full of alternatives to bypass host defense mechanisms. Our group has shown that the parasitic protist encodes for 14 sphingomyelinases (SMases); one of them (acid sphingomyelinase 6, aSMase6) is involved in repairing membrane damage and exhibits hemolytic activity.
View Article and Find Full Text PDFNupR Is Involved in the Control of PlcR: A Pleiotropic Regulator of Extracellular Virulence Factors.
Microorganisms
January 2025
Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China.
NupR is a nucleoside permease regulator belonging to the GntR family, mainly regulating nucleoside transport in . A conserved binding site for NupR was found in the promoter region of . This study aimed to investigate the regulation of the virulence regulator PlcR by NupR and its impact on Bt virulence.
View Article and Find Full Text PDFEmerging Resistance and Virulence Patterns in : Insights into Silver Nanoparticles as an Antimicrobial Strategy.
Antibiotics (Basel)
January 2025
The Research Institute of the University of Bucharest (ICUB), 050095 Bucharest, Romania.
Background/objectives: This study aims to characterize antibiotic resistance (AR) and virulence markers in spp. isolated from Romanian outpatients' stool samples.
Methods: In 2019, community-acquired strains were collected and identified using MALDI-TOF mass spectrometry, antibiotic susceptibility profiles have been determined with the MicroScan system, and soluble virulence factors were evaluated using specific culture media, while biofilm formation was quantified in 96-well plates.
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