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Protozoa-enhanced conjugation frequency alters the dissemination of soil antibiotic resistance.
ISME J
January 2025
State Key Laboratory for Ecological Security of Regions and Cities, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China.
Protozoa, as primary predators of soil bacteria, represent an overlooked natural driver in the dissemination of antibiotic resistance genes. However, the effects of protozoan predation on antibiotic resistance genes dissemination at the community level, along with the underlying mechanisms, remain unclear. Here we used fluorescence-activated cell sorting, qPCR, combined with metagenomics and reverse transcription quantitative PCR, to unveil how protozoa (Colpoda steinii and Acanthamoeba castellanii) influence the plasmid-mediated transfer of antibiotic resistance genes to soil microbial communities.
View Article and Find Full Text PDFMechanistic Cooperation of the Two Pore-Forming Transmembrane Motifs Regulates the β-Barrel Pore Formation by Listeriolysin O.
Biochemistry
January 2025
Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, SAS Nagar, Manauli, Mohali, Punjab 140306, India.
Listeriolysin O (LLO) is a potent membrane-damaging pore-forming toxin (PFT) secreted by the bacterial pathogen . LLO belongs to the family of cholesterol-dependent cytolysins (CDCs), which specifically target cholesterol-containing cell membranes to form oligomeric pores and induce membrane damage. CDCs, including LLO, harbor designated pore-forming motifs.
View Article and Find Full Text PDFThe Japanese encephalitis virus NS1' protein facilitates virus infection in mosquitoes.
PLoS Negl Trop Dis
January 2025
Research Center for Swine Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.
Background: The Japanese encephalitis virus (JEV), a mosquito-borne flavivirus, is known for its capacity to cause severe neurological disease in Asia. Neurotropic flaviviruses within the Japanese encephalitis (JE) serogroup possess the distinctive feature of expressing a unique nonstructural protein, NS1'. The NS1' protein consists of the full NS1 protein with an additional 52 amino acid extension at the C-terminus and has been demonstrated to exhibit virulence in mammalian hosts upon infection.
View Article and Find Full Text PDFClone-Resolved Chemical Depletion of T cells via Cellular Proximity Chemistry.
Angew Chem Int Ed Engl
January 2025
Nanjing University, School of Chemistry and Chemical Engineering, CHINA.
T cells play a pivotal role in the development of autoimmune diseases. To mitigate autoimmune inflammation without inducing global immunosuppression, it is crucial to selectively eliminate autoreactive T cell clones while preserving the normal T cell repertoire. In this study, we applied cellular proximity chemistry to develop a T-cell depletion method with clonal precision.
View Article and Find Full Text PDFGut microbiota and its impact on critical illness.
Curr Opin Crit Care
January 2025
Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS).
Purpose Of Review: This narrative review discusses the mechanisms connecting gut dysbiosis to adverse clinical outcomes in critically ill patients and explores potential therapeutic strategies.
Recent Findings: In recent years, the study of microbiota in ICUs has gained attention because of its potential effects on patient outcomes. Critically ill patients often face severe conditions, which can compromise their immune systems and lead to opportunistic infections from bacteria typically harmless to healthy individuals.
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