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Uncommon Diterpenoids with Diverse Frameworks from the South China Sea Sponge and Their Anti-inflammatory Activities.
J Org Chem
January 2025
School of Medicine, Shanghai University, 99 Shangda Road, BaoShan District, Shanghai 200444, China.
Uncommon diterpenoids with diverse frameworks, including one unexpected iodinated oxa-6/6/6/6-tetracyclic diterpene () and its monobrominated 6/6/6-tricyclic analogue () and one novel isodolastane-type diterpene featuring an unusual aromatic 5/7/6-tricyclic ring system () as well as a related known dolastane-type diterpenoid (), were isolated from the South China Sea sponge . Their structures, including absolute configurations, were established by extensive spectroscopic data analysis, X-ray diffraction analysis, and quantum mechanical-nuclear magnetic resonance and time-dependent density functional theory/electronic circular dichroism calculations. A plausible biosynthetic pathway of new compounds - was proposed.
View Article and Find Full Text PDFDehydrothyrsiferol Against Cutaneous Leishmaniasis: Treatment Outcome in a Murine Model.
Mar Drugs
December 2024
Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias (IUETSPC), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez s/n, 38206 La Laguna, Spain.
One of the most important steps in preclinical drug discovery is to demonstrate the in vivo efficacy of potential leishmanicidal compounds and good characteristics at the level of parasite killing prior to initiating human clinical trials. This paper describes the use of dehydrothyrsiferol (DT), isolated from the red alga , in a pharmaceutical form supported on Sepigel, and the in vivo efficacy against a mouse model of cutaneous leishmaniasis. Studying the ultrastructural effect of DT was also carried out to verify the suspected damage at the cellular level and determine the severity of damages produced in the homeostasis of promastigotes.
View Article and Find Full Text PDFChemical Changes Under Heat Stress and Identification of Dendrillolactone, a New Diterpene Derivative with a Rare Rearranged Spongiane Skeleton from the Antarctic Marine Sponge .
Mar Drugs
December 2024
Consiglio Nazionale delle Ricerche (CNR), Istituto di Chimica Biomolecolare (ICB), Via Campi Flegrei 34, 80078 Pozzuoli, Napoli, Italy.
The waters around the western Antarctic Peninsula are experiencing fast warming due to global change, being among the most affected regions on the planet. This polar area is home to a large and rich community of benthic marine invertebrates, such as sponges, tunicates, corals, and many other animals. Among the sponges, the bright yellow is commonly known for using secondary diterpenoids as a defensive mechanism against local potential predators.
View Article and Find Full Text PDFsp. nov., a bacterium isolated from the air of the Icelandic volcanic island Surtsey.
Int J Syst Evol Microbiol
January 2025
Department of Research and Innovation, MATIS, Reykjavk, Iceland.
A novel bacterium, designated 19SA41, was isolated from the air of the Icelandic volcanic island Surtsey. Cells of strain 19SA41 are Gram-stain-negative, strictly aerobic, non-motile rods and form pale yellow-pigmented colonies. The strain grows at 4-30 °C (optimum, 22 °C), at pH 6-10 (optimum, pH 7.
View Article and Find Full Text PDFStevioside mitigates metabolic dysregulation in offspring induced by maternal high-fat diet: the role of gut microbiota-driven thermogenesis.
Gut Microbes
December 2025
College of Food Science and Engineering, Northwest A&F University, Yangling, China.
Maternal obesity poses a significant threat to the metabolic profiles of offspring. Microorganisms acquired from the mother early in life critically affect the host's metabolic functions. Natural non-nutritive sweeteners, particularly stevioside (STV), play a crucial role in reducing obesity and affecting gut microbiota composition.
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