ABSTRACT
A new monoterpenoid indole alkaloid compound (1) and six known monoterpenoid indole alkaloids compounds (2-7) were isolated from the barks of Voacanga africana Staph. The structures were established by spectral analysis as ibogamine-16-carboxylic acid,17,20-didehydro-5,6-dioxo-10-methoxy-methyl ester (1), voacamine (2), vobasine (3), voacangine (4), voacristine (5), 19-epi-voacristine (6) and 19-epi-heyneanine (7). Compound 1 was confirmed by X-ray crystallographic analysis. All of the isolated compounds were evaluated for cytotoxicity against five cell lines (HEPG-2, A375, MDA-MB-231, SH-SY5Y, CT26). Among them, compounds 2 and 6 displayed significant inhibitory activities, compounds 3, 4 and 5 showed moderate inhibitory activities, while compounds 1 and 7 showed no inhibitory activities against the five cell lines.
Subject(s)
Antineoplastic Agents, Phytogenic/pharmacology , Secologanin Tryptamine Alkaloids/isolation & purification , Secologanin Tryptamine Alkaloids/pharmacology , Voacanga/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Bridged-Ring Compounds/isolation & purification , Bridged-Ring Compounds/pharmacology , Cell Line, Tumor/drug effects , Humans , Ibogaine/analogs & derivatives , Ibogaine/isolation & purification , Indole Alkaloids/isolation & purification , Molecular Structure , Plant Bark/chemistryABSTRACT
OBJECTIVE: To optimize the process of Icraiin be hydrolyzed to Baohuoside I by cellulase by Plackett-Burman design combined with Central Composite Design (CCD) response surface methodology. METHODS: To select the main influencing factors by Plackett-Burman design, using CCD response surface methodology to optimize the process of Icraiin be hydrolyzed to Baohuoside I by cellulase. Taking substrate concentration, the pH of buffer and reaction time as independent variables, with conversion rate of icariin as dependent variable,using regression fitting of completely quadratic response surface between independent variable and dependent variable,the optimum process of Icraiin be hydrolyzed to Baohuoside I by cellulase was intuitively analyzed by 3D surface chart, and taking verification tests and predictive analysis. RESULTS: The best enzymatic hydrolytic process was as following: substrate concentration 8. 23 mg/mL, pH 5. 12 of buffer,reaction time 35. 34 h. CONCLUSION: The optimum process of Icraiin be hydrolyzed to Baohuoside I by cellulase is determined by Plackett-Burman design combined with CCD response surface methodology. The optimized enzymatic hydrolytic process is simple, convenient, accurate, reproducible and predictable.
