From propolis samples from Kenya, two new arylnaphtalene lignans were isolated, tetrahydrojusticidin B 1 and 6-methoxydiphyllin 2, along with four known phenolic compounds 5-8, found for the first time in propolis. The structures of the compounds were elucidated based on their spectral properties. The geranylstilbenes 7 and 8 demonstrated antibacterial activity against S. aureus, and the geranylflavon macarangin 6 possessed antiradical activity against DPPH radicals.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.fitote.2010.01.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pyrimidinergic P2Y1-Like Nucleotide Receptors Are Functional in Rat Conjunctival Goblet Cells.
Invest Ophthalmol Vis Sci
January 2025
Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States.
Purpose: To investigate the presence of uridine-5'-triphosphate (UTP)-activated P2Y1-like nucleotide receptors (P2Y2R, P2Y4R, and P2Y6R) in conjunctival goblet cells (CGCs) and determine if they increase intracellular Ca2+ concentration ([Ca2+]i) and induce mucin secretion.
Methods: Adult, male rat conjunctiva was used for culture of CGCs. To investigate the expression of P2YRs, mRNA was extracted from CGCs and used for reverse transcription PCR (RT-PCR) with commercially obtained primers specific to P2Y2R, P2Y4R, and P2Y6R.
Pneumococcal and Herpes Zoster Vaccination Rates Among U.S. Veterans With Chronic Inflammatory Disease on Biologic Medications: A Quality Improvement Project.
Mil Med
January 2025
Department of Rheumatology, VA Medical Center Memphis, TN 38104, USA.
Introduction: Patients with chronic inflammatory diseases are often treated with pharmacologic therapies that target the immune system and have an increased risk of infection. These risks can be reduced by vaccination against common pathogens. This quality improvement project aimed to increase pneumococcal and herpes zoster vaccination rates in patients with chronic inflammatory disease on biologic immunosuppressive therapy.
View Article and Find Full Text PDFSingle-cell and spatial transcriptomics illuminate bat immunity and barrier tissue evolution.
Mol Biol Evol
January 2025
Shmunis School of Biomedicine and Cancer Research, George S Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
Bats have adapted to pathogens through diverse mechanisms, including increased resistance - rapid pathogen elimination, and tolerance - limiting tissue damage following infection. In the Egyptian fruit bat (an important model in comparative immunology) several mechanisms conferring disease tolerance were discovered, but mechanisms underpinning resistance remain poorly understood. Previous studies on other species suggested that elevated basal expression of innate immune genes may lead to increased resistance to infection.
View Article and Find Full Text PDFImpact of human intervention and predator-prey dynamics on ecosystem virus transmission.
Chaos
January 2025
School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.
Humans and predators occupy dominant positions in ecosystems and are generally believed to play a decisive role in maintaining ecosystem stability, particularly in the context of virus transmission. However, this may not always be the case. By establishing some ecosystem virus transmission models that cover both human perspectives and predators, we have drawn the following conclusions: (1) Controlling vaccination activities from the human perspective can potentially lower the transmission rate and improve herd immunity, thereby indirectly protecting unvaccinated risk groups.
View Article and Find Full Text PDFSynergistic activity of Pitstop-2 and 1,6-hexanediol in aggressive human lung cancer cells.
Discov Nano
January 2025
Institute of Physiology II, University of Münster, Robert-Koch-Str. 27b, 48149, Münster, Germany.
Metastatic cancer cells undergo metabolic reprogramming, which involves changes in the metabolic fluxes, including endocytosis, nucleocytoplasmic transport, and mitochondrial metabolism, to satisfy their massive demands for energy, cell division, and proliferation compared to normal cells. We have previously demonstrated the ability of two different types of compounds to interfere with linchpins of metabolic reprogramming, Pitstop-2 and 1,6-hexanediol (1,6-HD). 1,6-HD disrupts glycolysis enzymes and mitochondrial function, enhancing reactive oxygen species production and reducing cellular ATP levels, while Pitstop-2 impedes clathrin-mediated endocytosis and small GTPases activity.
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!