The world is in the midst of an antimicrobial resistance crisis, driving a need to discover novel antibiotic substances. Using chemical cues as inducers to unveil a microorganism's full metabolic potential is considered a successful strategy. To this end, we investigated an inducible antagonistic behavior in multiple isolates of the order Bacillales, where large inhibition zones were produced against Ralstonia solanacearum only when grown in the presence of the indicator triphenyl tetrazolium chloride (TTC). This bioactivity was produced in a TTC-dose dependent manner. Escherichia coli and Staphylococcus sp. isolates were also inhibited by Bacillus sp. strains in TTC presence, to a lesser extent. Knockout mutants and transcriptomic analysis of B. subtilis NCIB 3610 cells revealed that genes from the L-histidine biosynthetic pathway, the purine, pyrimidine de novo synthesis and salvage and interconversion routes, were significantly upregulated. Chemical space studied through metabolomic analysis, showed increased presence of nitrogenous compounds in extracts from induced bacteria. The metabolites orotic acid and L-phenylalaninamide were tested against R. solanacearum, E. coli, Staphylococcus sp. and B. subtilis, and exhibited activity against pathogens only in the presence of TTC, suggesting a biotransformation of nitrogenous compounds in Bacillus sp. cells as the plausible cause of the inducible antagonistic behavior.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7101371 | PMC |
| http://dx.doi.org/10.1038/s41598-020-62236-z | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Hydroxysafflor yellow A attenuates the inflammatory response in cerebral ischemia-reperfusion injured mice by regulating microglia polarization per SIRT1-mediated HMGB1/NF-κB signaling pathway.
Int Immunopharmacol
January 2025
Department of Pharmacy, Anhui University of Chinese Medicine, Hefei, China; Anhui Province Key Laboratory of Traditional Chinese Medicine Decoction Pieces of New Manufacturing Technology, Bozhou 236000, China. Electronic address:
Background: Hydroxysafflor yellow A (HSYA), an active component isolated from Carthamus tinctorius L., has demonstrated potent protective effects against cerebral ischaemia/reperfusion (I/R) injury. Microglial polarisation plays a crucial role in I/R.
View Article and Find Full Text PDFPreclinical Experience Using 4D Intracardiac Echocardiography to Guide Cardiac Electrophysiology Procedures.
J Cardiovasc Electrophysiol
December 2024
Division of Cardiovascular Medicine, Cardiac Electrophysiology Section, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Introduction: Intracardiac echocardiography (ICE) is an essential imaging modality for electrophysiology procedures, allowing intraprocedural monitoring, real-time catheter manipulation guidance, and visualization of complex anatomic structures. Four-dimentional (4D) ICE is the next stage in the evolution of the technology, permitting 360° rotation of the imaging plane, simultaneous multiplanar imaging, and volumetric acquisition, similar to transesophageal echocardiography (TEE). In this study, we report our experience with a novel 4D ICE catheter (NuVision, Biosense Webster) in structural electrophysiology procedures and difficult ventricular ablations in a swine preclinical model.
View Article and Find Full Text PDFCLEC7A Knockdown Alleviates Ischemic Stroke by Inhibiting Pyroptosis and Microglia Activation.
J Integr Neurosci
December 2024
Department of Neurology, Hainan West Central Hospital, 571799 Danzhou, Hainan, China.
Background: Ischemic stroke (IS) is the leading cause of mortality worldwide. Herein, we aimed to identify novel biomarkers and explore the role of C-type lectin domain family 7 member A () in IS.
Methods: Differentially expressed genes (DEGs) were screened using the GSE106680, GSE97537, and GSE61616 datasets, and hub genes were identified through construction of protein-protein interaction networks.
Transcranial Cortex-Wide Imaging of Murine Ischemic Perfusion With Large-Field Multifocal Illumination Microscopy.
Stroke
January 2025
Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Switzerland (Z.C., Q.Z., Y.-H.L., C.G., I.G., M.W., H.A.I.Y., D.R.K., B.W., D.R.).
Background: Ischemic stroke is a common cause of death worldwide and a main cause of morbidity. Presently, laser speckle contrast imaging, x-ray computed tomography, and magnetic resonance imaging are the mainstay for stroke diagnosis and therapeutic monitoring in preclinical studies. These modalities are often limited in terms of their ability to map brain perfusion with sufficient spatial and temporal resolution, thus calling for development of new brain perfusion techniques featuring rapid imaging speed, cost-effectiveness, and ease of use.
View Article and Find Full Text PDFTargeting TXNIP for neuroprotection: A novel approach to reducing inflammation and promoting recovery in ischemic stroke.
Biomol Biomed
December 2024
Department of Science and Education, The Third People's Hospital of Hefei, Hefei Third Clinical College of Anhui Medical University, Hefei, Anhui, China; Anhui Province Key Laboratory of Occupational Health, Anhui Provincial People's Hospital, Hefei, China.
Ischemic stroke often results in high mortality and significant disability. Current research primarily focuses on understanding neuroinflammation and cell death following a stroke to identify novel therapeutic targets. This study investigates the endothelial cell-specific role of Thioredoxin interacting protein (TXNIP) in ischemic stroke and its underlying molecular mechanisms both in vitro and in vivo.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!