The depsidones from marine sponge-derived fungus IB151 as an anti-MRSA agent: Molecular docking, pharmacokinetics analysis, and molecular dynamic simulation studies.

Methicillin-resistant (MRSA) is an emerging nosocomial pathogen among hospitalized patients, with high morbidity and mortality rates. The discovery of a novel antibacterial is urgently needed to address this resistance problem. The present study aims to explore the antibacterial potential of three depsidone compounds: 2-clorounguinol (), unguinol (), and nidulin (), isolated from the marine sponge-derived fungus IB1, both and .

Comparative Study of Phytochemical, Antioxidant, and Cytotoxic Activities and Phenolic Content of (Burm. f. Alston f.) Extracts Growing in West Sumatera Indonesia.

, consisting of various fruit colors, is one of the plants that have been used as traditional medicine. This study aims to evaluate and compare phytochemical, antioxidant, and cytotoxic activities and total phenolic content of leaves and stem bark extracts of with pink and red fruits, in order to identify the best extract that can be used as a natural antioxidant. Phytochemical constituents were evaluated qualitatively using chemicals, while cytotoxic activities were identified using the brine shrimp lethality test.

Sentulic acid isolated from Sandoricum koetjape Merr attenuates lipopolysaccharide and interferon gamma co-stimulated nitric oxide production in murine macrophage RAW264 cells.

A seco-triterpenoid, sentulic acid (SA) isolated from Sandoricum koetjape Merr attenuated nitric oxide (NO) production following co-stimulation with lipopolysaccharide (LPS) and interferon-gamma (IFNγ) in RAW264.7 macrophage cells. The mRNA expression levels of proinflammatory cytokines such as tumor necrosis factor-alpha (TNF-α), IFNγ, interleukin (IL)-6, and IL-12 in LPS/IFNγ co-stimulated RAW264.

Phytochemical analysis and antileukemic activity of polyphenolic constituents of Toona sinensis.

Toona sinensis is a traditional Chinese medicine belonging to the Meliaceae family. The aim of this study was to identify the potential compounds responsible for anticancer activity of T. sinensis.

Clerodane diterpenes isolated from Polyalthia longifolia induce apoptosis in human leukemia HL-60 cells.

Polyalthia is a versatile genus of shrubs and trees found in tropic and sub-tropic regions. In this study, three clerodane diterpenes, kolavenic acid (1), polyalthialdoic acid (2), and 16α-hydroxy-cleroda-3,13(14)Z-dien-15,16-olide (3) isolated from Polyalthia longifolia leaves were evaluated for their apoptotic potential against human leukemia HL-60 cells. Compounds 2 and 3 inhibited cell proliferation with IC₅₀ values of 21.

Sentulic acid: a cytotoxic ring A-seco triterpenoid from Sandoricum koetjape Merr.

A new ring A-seco triterpenoid, sentulic acid, along with a known oleanane-type triterpenoid, 3-oxoolean-12-en-27-oic acid, were isolated from the Indonesian plant Sandoricum koetjape Merr. Their chemical structures were elucidated by spectroscopic analysis. In addition, the cytotoxic effects of these compounds on human promyelocytic leukemia HL-60 cells were studied.

Isolation of chemical constituents from Enicosanthum cupulare (King) Airy-Shaw.

Six chemical constituents were isolated from Enicosanthum cupulare (King) Airy-Shaw. The structures of the isolated compounds were determined using 1D, 2D-NMR and were found to be identical to those previously reported for these compounds. Three aporphine alkaloids, O-methylmoschatoline, liriodenine and oxostephanine were isolated from this plant for the first time.

Chemical studies on Goniothalamus tapis Miq.

Ten secondary metabolites were identified from Goniothalamus tapis Miq. The structures of these compounds were elucidated using spectroscopic analyses. It was revealed for the first time that 3-methyl-1H-benz[f]indole-4,9-dione was produced by the organism.

N-trans-feruloyltyramine as a melanin biosynthesis inhibitor.

In this study, we examined the effect of N-trans-feruloyltyramine (FA) on melanogenesis in mouse B16 melanoma cells. Melanogenesis was inhibited by FA in a dose-dependent manner. FA exhibited a greater potency than kojic acid as a standard inhibitor of melanogenesis.

The isolation of secondary metabolites and in vitro potent anti-cancer activity of clerodermic acid from Enicosanthum membranifolium.

Four compounds were isolated from Enicosanthum membranifolium. The structures of the compounds were confirmed by spectroscopic data. Their structures were determined as N-trans-feruloyltyramine, R-(-)-mellein, clerodermic acid, and salicifoline chloride as a quaternary alkaloid compound.