OBJECTIVE:To establish RP-HPLC method for the simultaneous determination content of rabeprazole(RAB)and its two metabolites thioether-rabeprazole(TE)and demethylated thioether-rabeprazole(DMTE)in human plasma.METHODS:The plasma samples were extracted with ethyl acetate;The Diamonsil C 18 reversed-phase column was used as analytical column,the mobile phase was consisted of methanol-water-glacial acetic acid-triethylamine(40∶60∶0.4∶0.1)with a flow rate at1.0ml/min,the ultraviolet detection wavelength was288nm.RESULTS:Good separation of chromatographic peaks of RAB,TE and DMTE were manifested.The mean recovery of which were110.40%,87.28%and98.21%respectively.CONCLUSION:The method was sensitive and accurate,and it meets the requirements for the study of pharmacokinetic of rabeprazole.

The prevalence rate of nonalcoholic fatty liver disease (NAFLD) has been increasing year by year.However,since the complex pathogenesis of NAFLD has not been fully clarified,there still lacks a gold standard for the diagnosis and treatment of NAFLD.5-Hydroxytryptamine (5-HT) can affect the development and progression of NAFLD via several links and thus change the course of NAFLD.This article introduces the association between 5-HT and NAFLD,the role of 5-HT in the pathogenesis of NAFLD,and its future application in treatment.

Objective To explore the predictive value of combined measurement of D-dimer (D-D),fibrinogen (FIB),and peripheral blood leukocyte count (PBLC) for the severity of acute pancreatitis (AP).Methods We collected the clinical data of 134 hospitalized patients who were diagnosed with AP in the General Hospital of Ningxia Medical University from January 2014 to January 2016.These patients were divided into mild acute pancreatitis (MAP) group (n =72) and severe acute pancreatitis (SAP) group (n =62).Also,these patients were divided into hyperlipidemic acute pancreatitis (HAP) group (n =43) and biliogenic acute pancreatitis (BAP) group (n =91).The initial measurements of D-D,FIB,and PBLC for the patients who were admitted to the hospital within 24 hours of onset and received no treatment before admission were collected.The t test was used for comparison of normally distributed continuous data,while the Mann-Whitney U test was used for non-normally distributed continuous data.The chi-square test was used for comparison of categorical data.In addition,the Spearman correlation test and Pearson correlation test were used for correlation analyses.The receiver operating characteristic (ROC) curve was used to analyze the predictive values of D-D,FIB,and PBLC for the severity of AP.Results Compared with the MAP group,the SAP group had significantly increased D-D and FIB levels in peripheral blood (Z =-3.171,P =0.002;t =-2.339,P =0.021).Compared with the HAP group,the BAP group had a significantly higher D-D level (Z =-4.178,P ＜ 0.001),an insignificantly higher FIB level (P ＞ 0.05),and a significantly lower PBLC (t =2.466,P =0.015).The areas under the ROC curve (AUCs) of D-D,FIB,and PBLC were 0.659,0.611,and 0.591,respectively,and D-D had a higher value than FIB and PBLC in predicting the severity of SAP.The AUC of a combination of D-D,FIB,and PBLC was 0.712.Plasma D-D and FIB levels were positively correlated with the severity of AP (r =0.275 and 0.192,P =0.001 and 0.026).Conclusions D-D,FIB,and PBLC are important for early judgment of the severity of AP,and a combination of the three markers has greater significance.

Objective: To investigate acid-suppression efficacy of proton pump inhibitors (PPIs) in relation to CYP2C19 genetic polymorphism on patients with peptic ulcer. Methods: By an open, randomized and control trial, fifty nine patients with active peptic ulcer were randomly assigned to receive one of three PPIs on a single dose (20 mg of each drug): omeprazole group (n = 19), rabeprazole group (n = 20) and esomeprazole group (n = 20). Intragastric pH was recorded 1 hour before and 24 hours after administration. CYP2C19 genotype was tested in all patients. Results: The EMs/PMs ratio of each group was 16/3,17/3 and 17/3, respectively. The total time that intragastric pH>4, time percent pH>4 and median pH in PMs patients were significantly higher than those in EMs patients of omeprazole group (P < 0.05). But all these differences were not found in rabeprazole group and esomeprazole group. The pH of nocturnal acid breakthrough (NAB) in both rabeprazole group and esomeprazole group was higher than that of omeprazole group, while there was no significant difference between rabeprazole group and esomeprazole group. Conclusion: The acid-suppression efficacy of omeprazole is highly dependent on CYP2C19 genetic polymorphism, while CYP2C19 genetic polymorphism may have a little influence on the acid-suppression efficacy of rabeprazole and esomeprazole. The acid-suppression action of rabeprazole and esomeprazole is superior to omeprazole, especially on night acid secretion.

Objective: To investigate acid-suppression efficacy of proton pump inhibitors (PPIs) in relation to CYP2C19 genetic polymorphism on patients with peptic ulcer. Methods: By an open, randomized and control trial, fifty nine patients with active peptic ulcer were randomly assigned to receive one of three PPIs on a single dose (20 mg of each drug): omeprazole group (n = 19), rabeprazole group (n = 20) and esomeprazole group (n = 20). Intragastric pH was recorded 1 hour before and 24 hours after administration. CYP2C19 genotype was tested in all patients. Results: The EMs/PMs ratio of each group was 16/3,17/3 and 17/3, respectively. The total time that intragastric pH>4, time percent pH>4 and median pH in PMs patients were significantly higher than those in EMs patients of omeprazole group (P < 0.05). But all these differences were not found in rabeprazole group and esomeprazole group. The pH of nocturnal acid breakthrough (NAB) in both rabeprazole group and esomeprazole group was higher than that of omeprazole group, while there was no significant difference between rabeprazole group and esomeprazole group. Conclusion: The acid-suppression efficacy of omeprazole is highly dependent on CYP2C19 genetic polymorphism, while CYP2C19 genetic polymorphism may have a little influence on the acid-suppression efficacy of rabeprazole and esomeprazole. The acid-suppression action of rabeprazole and esomeprazole is superior to omeprazole, especially on night acid secretion.

Nonalcoholic fatty liver disease (NAFLD) is a clinicopathological syndrome caused by liver damage factors except alcohol and has the major feature of diffuse macrovesicular hepatocyte steatosis.Thetwo-hit hypothesis can partly explain the pathogenesis of NAFLD.Recent studies have found that ceramide is a key molecular messenger involved in the development and progression of NAFLD,and as a sphingolipid,it is closely associated with the two-hit hypothesis.This article reviews the role of ceramide in NAFLD.

Objective To investigate the diagnostic value of the instant gastrointestinal ultrasound contrast agent in the digestive diseases. Methods Five hundred and seventy-nine patients received the examination of the color Doppler after they drinked the ultrasonic contrast agent. Then the results were analyzed by consistency analysis. Results There was high consistency between the two examinations in the normal control, gastritis, peptic ulcer, gastric cancer and gastric leiomyoma. The Kappa value was 0.768, 0.913, 0.925, 0.939 and 1.000, respectively. But the consistency in the gastric polyp was low , the Kappa value was 0.368. Conclusion The color Doppler through the instant gastrointestinal ultrasound contrast agent has high diagnostic value in the common diseases of the digestive system.

BACKGROUND: Basic fibroblast growth factor (bFGF), a kind of polypeptide growth factor possessing multifunctional biological activities,can protect neurons and promote the growth of nerves. It has been corfirmed that bFGF has therapeutic effects on retina ischemia/reperfusion injury (RIRI).OBJECTIVE: To establish RIRI model and analyze the effects of bFGF on cellular apoptosis of retina and the expression of regulatory gene protein.DESIGN: Randomized grouping and validating trial.SETTING: Department of Ophthalmology, the Affiliated Hospital of Medical College of Qingdao University.MATERIALS: The experiment was conducted at the Research Laboratory of Pathology, Department of Ophthalmology, Medical College of Qingdao University, from April 2002 to December 2003. Twenty-eight healthy Wistar rats were enrolled in this experiment. Four rats were randomly chosen for normal control group, the left eyes of the other 24 rats were set as normal saline control group, and the right eyes were set as bFGF group.METHODS: Normal saline control group and bFGF group adopted the rat RIRI models established by transiently elevating intraocular pressure. Normal saline of 12 μL was injected into the vitreous cavity of the left eyes of the rats in normal control group. 12 μL bFGF was injected into the vitreous cavity of the right eyes of the rats in bFGF group, 4 rats once. No administration was given in normal control group. The expression of apoptotic cells was detected and apoptosis indexes were calculated with the terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick-end labeling (TUNEL) method and immunohistochemical staining method at the 1st, 6th,12th, 24th,48th and 72nd hours after reperfusion and ischemia for 1 hour.MAIN OUTCOME MEASURES: ① The detection results of apoptotic cells in situ of retina tissuesat different time points after reperfusion. ②The expression of Fas and caspases-2 in retina tissues at different time points after reperfusion.RESULTS ① Comparison of apoptosis indexes of retina tissues at different time points after ischemia reperfusion: There were no apoptotic cells in the retina tissues of the rats in normal control group. As compared with those in normal saline control group, apoptosis indexes in bFGF group were significantly decreased at ischemia 1 hour and reperfusion 1, 6, 12, 24, 48and 72 hours, especially at the 12th, 24th and 48th hours after reperfusion (t =5.362-5.595, P ＜ 0.05). ② The change of Fas expression at different time points after ischemia reperfusion: There was hardly any Fas expression in normal control group. As compared with that in normal saline control group, Fas expression in bFGF group was significantlydecreased at ischemia 1 hour and reperfusion 1, 6, 12, 24, 48 and 72 hours, especially at the 6th, 12th and 24th hours after reperfusion (t=3.954-9.327, P ＜ 0.05). ③The changes of caspase-2 expression at different time points after ischemia reperfusion: There was no caspase-2 expression in normal control group.Compared with that in normal saline control group, the number of caspase2 positive cells in bFGF group was significantly decreased at the 6th,12th,24th, 48th and 72nd hours after ischemia for 1 hour and reperfusion (t=4.125-15.641, P ＜ 0.05).CONCLUSION: bFGF can significantly inhibit the expression of apoptosis gene Fas and caspase-2 in the ischemia and reperfusion of retina, thus reducing cellular apoptosis of ganglion cells and exerting therapeutic effects on the ischemia and reperfusion of retina.

BACKGROUND: Previous studies demonstrated that,metabolic phenotype of cytochrome P450 2C19 has genetic polymorphism,which presents with extensive or poor metabolisms and has great differences in races and individuals.OBJECTIVE: To study the genotype distribution of cytochrome P450 2C19 in Xinjiang Uigur population.METHODS: In total 144 unrelated Uigur and 156 unrelated Han subjects were genotyped for cytochrome P450 2C19 by polymerase chain reaction-restriction fragment length polymorphism.The differences of gene phenotype and gene frequency were compared between Uigur and Han populations.RESULTS AND CONCLUSION: The frequency of extensive metabolism wt/wt,wt/m and wt/m1+wt/m2 of Uigur was notably higher than that of Han population(P<0.05),but the frequency of poor metabolism m1/m1 was obviously lower than that of Han population(P<0.05).There were significant differences between Uigur and Han populations in allele frequency wt,m1 and m2(P<0.05),especially m1,which was 58-fold of m2(P<0.01).The results revealed that,distribution frequency m1/m1 of poor metabolism of Uigur is obviously lower than that in Han population,and m1 frequency is higher than that of Han population,accordingly,m1 is the main gene mutation of cytochrome P450 2C19 in Uigur population.