Objective To study the relationship between energy metabolic changes tested by phosphorus-31 magnetic resonance(MR)spectroscopy(31P MRS)and the liver damage score(LDS)in rabbit models and investigate the diagnostic value of 31P MRS in acute hepatic injury.Methods A total of 30 rabbits were received different radiation dose(ranging from 5 Gy to 20 Gy)to establish acute hepatic injury models.31P MRS was than carried out 24 hrs after radiation.The rabbits were divided into mild(LDS≤3 U),moderate(LDS 3-6 U)and severe(LDS＞6 U)hepatie injury groups.Ten healthy rabbits were served as controls.MR examination was performed on a 1.5 T imager using a 1H/31P surface coil by the 2D chemical shift imaging technique.The relative quantification of phosphomonoesters(PME),phosphodiesters (PDE), inorganic phosphate (Pi) and adenosine severe hepatic injury groups were 1.83±0.33,1.55±0.24,1.27±0.07 and 0.98±0.18,respectively,with significant differences(P＜0.05).The ATP level was progressively decreased with the increase of severity Of hepatic injury.The relative quantification of PME and Pi were decreased in severe hepatic injury group compared to control group(P＜0.05).There was no significant difference higher in moderate(1.94±0.50)and severe(1.96±0.72)hepatic injury groups compared to control group(1.43±0.31)and mild hepatic injury group(1.40+0.38)(P＜0.05).No significant difference was found in ratio of relative quantification of other phosphorus metabolites.Conclusions 31P MRS is a useful method in evaluating acute hepatic injury.The relative quantification of hepatic ATP level,which can reflect the severity of acute hepatic injury,is correlated with LDS.

Heart failure is a clinical syndrome caused by various causes of myocardial damage and cardi-ac function decrease that cannot meet the body's metabolic needs.The proinflammatory cytokines play an im-portant role in the process of occurrence and development of heart failure.The Notch1/Jagged1 signaling path-way is related to the proinflammatory cytokines,inflammatory responses and immune responses.This paper discusses the involvement of the Notch1/Jagged1 signaling pathway in the development and development of chronic heart failure by modulating immune inflammation.

OBJECTIVE： To optimize the processing technology of fried Radix Paeoniae， and to provide reference for quality control of the processed products. METHODS： The content of paeoniflorin in fried Radix Paeoniae was determined by HPLC. The determination was performed on Agilent ZORBAX SB-C18 column with mobile phase consisted of acetonitrile-0.05 mol/L potassium dihydrogen phosphate solution （15 ∶ 85， V/V） at the flow rate of 1.0 mL/min. The column temperature was 30 ℃， and detection wavelength was set at 230 nm. The sample size was 10 μL. The appearance character of fried Radix Peaoniae were investigated by appearance color， crosssection color， hardness and smell. Taking the comprehensive score of appearance character and paeoniflorin content as evaluation index， the dosage， stir-frying temperature and stir-frying time were investigated. According to the results of single factor test， Box-Behnken response surface methodology was used to optimize above 3 factors. The optimized processing technology was validated. RESULTS： The linear range of paeoniflorin were 0.02-4.15 mg/mL （r＝0.999 9）； precision， stablity， repeatability and sample recovery rate meet the requirements. The optimal technology of fried Radix Paeoniae included the dosage of 374.60 g， frying temperature of 101.61 ℃， frying time of 20 min. Under optimal technology， comprehensive score of fried Radix Paeoniae ranged 97.39-98.82 in 6 times of parallel verification tests （RSD＝0.54％）， which was close to predicted value 98.18. The color of fried Radix Paeoniae was slightly deeper than Radix Paeoniae， which was crisp and fragrant. CONCLUSIONS： The optimized processing technology of fried Radix Paeoniae is stable and feasible， and is suitable for the preparation of the processed products.