Objective To investigate the chemical composition of the underground parts of Ferula songarica Pall. ex Schult., and to evaluate the antiproliferative activity of its isolated compounds on gastric cancer HGC-27 cells.
Methods The air-dried, powdered underground parts of Ferula songarica Pall. ex Schult. were extracted with 95% ethanol, followed by sequential liquid-liquid partition with petroleum ether, dichloromethane, and ethyl acetate. The dichloromethane fraction was systematically isolated and purified by silica gel column chromatography combined with semi-preparative HPLC. The structures of the obtained compounds were elucidated by NMR, MS, and other spectroscopic analyses, together with their physicochemical properties. The in vitro anti-proliferative activity of the obtained compounds against human gastric cancer HGC-27 cells was evaluated using the MTT assay.
Results 5 monomeric compounds were isolated and identified, namely (5R,6R,9S,10S,11S)-1,1,5,6-tetramethyldecahydro-6,10-methanoazulen-11-yl-4-hydroxybenzoate (1), jaeschkeanadiol (2), 6-angeloyl-10-hydroxy-jaeschkeanadiol (3) lancerdiol vanillate (4), and 10-epi-γ-eudesmol (5). The evaluation results of anti-gastric cancer activity showed that compounds 1, 3, and 4 had significant inhibitory effects on the proliferation of gastric cancer HGC-27 cells, with half-maximal inhibitory concentrations (IC50) of 18.55, 32.82, and 19.17 mmol/L, respectively; compound 5 exhibited only weak inhibitory activity (IC50>50 mmol/L), while compound 2 showed no significant inhibitory activity (IC50>100 mmol/L).
Conclusion Compound 1 is a new compound, and compounds 2 to 5 were isolated for the first time from Ferula songarica Pall. ex Schult.. In vitro antiproliferative activity evaluation shows that compounds 1, 3, and 4 have significant inhibitory effects on human gastric cancer HGC-27 cells. This study provides experimental evidence for the in-depth exploration of anti-gastric cancer active ingredients in Ferula songarica Pall. ex Schult. and the development of medicinal substitute resources for Ferula.
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