Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC374820 | PMC |
| http://dx.doi.org/10.1128/jb.9.2.143-149.1924 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
κ-Carrageenan tetrasaccharide ameliorates particulate matter-induced defects in skin hydration of human keratinocytes cells and skin barrier disorders.
Int J Biol Macromol
January 2025
College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen 361021, China. Electronic address:
Urban air pollutants, mainly represented by PM containing organic and inorganic substances, can penetrate the human skin and trigger oxidative stress, potentially causing skin barrier damage and aging. κ-Carrageenan oligosaccharides as degradation products of natural sulfated polysaccharide have a great potential for skin moisturization as well as improving oxidative stress and inflammation. In this study, κ-carrageenan tetrasaccharide was obtained by enzymatic digestion of κ-carrageenan, and its role in alleviating particulate matter-induced inflammatory response in HaCaT keratinocyte cell line and skin barrier dysfunction was evaluated.
View Article and Find Full Text PDFCarboxy-Amidated AamAP1-Lys has Superior Conformational Flexibility and Accelerated Killing of Gram-Negative Bacteria.
Biochemistry
January 2025
Department of Biochemistry, Genetics and Microbiology, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria 0002, South Africa.
C-terminal amidation of antimicrobial peptides (AMPs) is a frequent minor modification used to improve antibacterial potency, commonly ascribed to increased positive charge, protection from proteases, and a stabilized secondary structure. Although the activity of AMPs is primarily associated with the ability to penetrate bacterial membranes, hitherto the effect of amidation on this interaction has not been understood in detail. Here, we show that amidation of the scorpion-derived membranolytic peptide AamAP1-Lys produces a potent analog with faster bactericidal activity, increased membrane permeabilization, and greater Gram-negative membrane penetration associated with greater conformational flexibility.
View Article and Find Full Text PDFEffective killing of biofilm by nanoemulsion delivery of plant phytochemicals.
Microbiol Spectr
January 2025
Department of Microbiology, University of Massachusetts, Amherst, Massachusetts, USA.
Unlabelled: is an acid-fast, aerobic, non-motile, and biofilm-forming bacterium. The increasing prevalence of mycobacterial infections makes it necessary to find new methods to combat the resistance of bacteria to conventional antibiotics. is an emerging pathogen that is intrinsically drug resistant due to several factors, including an impermeable cell envelope, drug efflux pumps, target-modifying enzymes, and the ability to form thick, robust biofilms.
View Article and Find Full Text PDFAcetylation of alginate enables the production of inks that mimic the chemical properties of biofilm.
J Mater Chem B
January 2025
Institute of Materials Science and Technology, Technische Universität Wien, Vienna, Austria.
The reason why certain bacteria, , (PA), produce acetylated alginate (Alg) in their biofilms remains one of the most intriguing facts in microbiology. Being the main structural component of the secreted biofilm, like the one formed in the lungs of cystic fibrosis (CF) patients, Alg plays a crucial role in protecting the bacteria from environmental stress and potential threats. Nonetheless, to investigate the PA biofilm environment and its lack of susceptibility to antibiotic treatment, the currently developed biofilm models use native seaweed Alg, which is a non-acetylated Alg.
View Article and Find Full Text PDFMucus-penetrating microbiota drive chronic low-grade intestinal inflammation and metabolic dysregulation.
Gut Microbes
December 2025
Microbiome-Host Interactions, Institut Pasteur, Université Paris Cité, INSERM U1306, CNRS UMR6047, Paris, France.
Metabolic syndrome is, in humans, associated with alterations in the composition and localization of the intestinal microbiota, including encroachment of bacteria within the colon's inner mucus layer. Possible promoters of these events include dietary emulsifiers, such as carboxymethylcellulose (CMC) and polysorbate-80 (P80), which, in mice, result in altered microbiota composition, encroachment, low-grade inflammation and metabolic syndrome. While assessments of gut microbiota composition have largely focused on fecal/luminal samples, we hypothesize an outsized role for changes in mucus microbiota in driving low-grade inflammation and its consequences.
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!