ABSTRACT
To explore the effect of vinegar-processed Curcumae Rhizoma on endogenous metabolites in bile by investigating the endogenous metabolites difference in bile before and after Curcumae Rhizoma was processed with vinegar. Alcohol extracts of crude and vinegar-processed Curcumae Rhizoma, as well as normal saline were prepared respectively, which were then given to the rats by intragastric administration for 0.5 h. Then common bile duct intubation drainage was conducted to collect 12 h bile of the rats. UPLC-TOF-MS analysis of bile samples was applied after 1∶3 acetonitrile protein precipitation; unidimensional statistics were combined with multivariate statistics and PeakView software was compared with network database to identify the potential biomarkers. Vinegar-processed Curcumae Rhizoma extracts had significant effects on metabolites spectrum in bile of the rats. With the boundaries of P<0.05, 13 metabolites with significant differences were found in bile of crude and vinegar-processed Curcumae Rhizoma groups, and 8 of them were identified when considering the network database. T-test unidimensional statistical analysis was applied between administration groups and blank group to obtain 7 metabolites with significant differences and identify them as potential biomarkers. 6 of the potential biomarkers were up-regulated in vinegar-processed group, which were related to the metabolism regulation of phospholipid metabolism, fat metabolism, bile acid metabolism, and N-acylethanolamine hydrolysis reaction balance, indicating the mechanism of vinegar-processed Curcumae Rhizoma on endogenous metabolites in bile of the rats.
ABSTRACT
Objective: To enhance the transformation rate of brucine and strychnine in Strychnos nux-vomica and establish a high efficient microbial transformation system by Cunninghamella blakesleeana. Methods: Based on the growth and metabolic rule of C. blakesleeana, through single-factor experiments, by using brucine sulphate and strychnine nitrate as substrates and the transformation rate of each substrate as index, several influential factors were investigated. Results: The optimal transformation condition was inoculation amount at 4%, fermentation time at 2.5 d, substrate concentration at 20 mg/L, transformation time at 3 d, culture temperature at 28°C, initial pH of medium at 6.5, and shaking speed at 150 r/min. Under the above condition, the average transformation rates of brucine sulphate and strychnine nitrate were approximate 77.75% and 77.10%, respectively. Conclusion: The average transformation rates of brucine sulphate and strychnine nitrate are increased by about 17% and 22%, respectively by C. blakesleeana, and this microbial transformation system could meet the need of the study on "toxicity attenuation and efficacy reservation" of S. nux-vomica.