Objective To compare the difference of protein and lipid metabolism between patients with inflammatory bowel disease and healthy controls,and to investigate the association of these changes with disease activity and location of the lessions.Methods The retrospective cohort study was carried out.The data of protein and lipid metabolisms collected from 195 patients with ulcerative colitis,76patients with Crohn's disease and 97 healthy controls during 1995 to 2007 were analyzed.Disease activity were evaluated using simple clinieal colitis activity index and simple index of Crohn's disease activity.The erythrocyte sedimentation rate(ESR)and C-reactive protein(CRP)were measured.Results Serum levels of ESR in patients with ulcerative colitis were negatively linear correlated with serum levels of albumin/globulin ratio(β=-0.521,P＜0.01)and positively linear correlated with serum levels of α2globulin(β=0.319,P＜0.01).Serum levels of globulin in patients with Crohn's disease were positively linear correlated with serum levels of ESR(β=0.558,P＜0.01)and CRP(β=0.424,P=0.01).In ulcerative colitis,serum levels of albumin/globulin ratio,albumin and total cholesterol were significantly higher in patients with proctosigmoiditis than those in patients with lesions at other locus(P=0.003,0.005,0.038,respectively).In Crohn's disease,serum level of globulin was significantly higher in patients with lesions only at colon than that in patients with lesions only at small bowel(P=0.029).Conclusions Serum levels of albumin/globulin ratio and α2-globulin can be predictors of inflammatory activity in patients with ulcerative colitis.The increasing serum globulin may predict the progression of disease activity in patients with Crohn's disease.The nutritional deficiency is more critical in patiens with small bowel involvement than those with colon involvement.

Objective To investigate the effects of gemcitabine,a cytotoxic drug,combined with photodynamic therapy (PDT) in treatment of human pancreatic cancer xenograft in nude mice.Methods The animal model of human pancreatic cancer was developed by suturing small pieces of SW1990 tumors into the dorsum of nude mice.Sixty animal models were randomly divided into five groups with 12 each:control group ( without any treatment ), photosensitizer group ( 2 mg/kg of Photosan, without illumination ),chemotherapy group (receiving 50 mg/kg of gemcitabine i.p. on day 0,3,6 and 9 after transplantation),photodynamic group (2 mg/kg photosan combined with laser irradiation) and combination group (50 mg/kg of gemcitabine and 2 mg/kg of photosan combined with laser irradiation). The tumor sizes were measured twice every week.All mice were sacrificed after 21 days.The tumor volume was calculated,and inhibitory effect and changes before and after treatment were analyzed.Results The tumor was grown bigger in control,photosensitizer and chemotherapy groups (all P value ＜0.05).On day 6,9,12,15,18and 21, the tumor size was significantly smaller in photodynamic group than those in control and photosensitize groups.While the tumor size on day 18 and 21 was smaller in combined group than those in photodynamic group(all P value ＜0.05). The tumor mass was (0.29 ± 0.20) g in combined group,which was lower than that in photodynamic,control,photosensitize and chemotherapy groups[(0.69±0.23) g,(1.65±0.21) g,(1.62±0.12) g,(1.37±0.19) g,respectively,P＜0.05].The inhibitory effect were 82.420%00 and 58.18% in combined group and photodynamic group,respectively(P＜0.05),while there was 1.80% and 17.00% in photosensitize and chemotherapy groups,respectively.Conclusions Photodynamic therapy has significant and short anti-tumor effect,but it can be significantly enhanced by combined with small dose of gemcitabine.

Objective To evaluate the protective effects of hydrotalcite,Marzulene-s,selbex,gefarnate,sucralfate and rebamipide against the gastric mucosa lesions induced by ethanol,aspirin,hydrochloric acid or prednisolone in rats.The changes in intercellular space width of gastric epithelial in rats was observed. Methods Four kinds of models were used to observe the protective effects of six agents against the gastric mucosal lesions.① Ethanol model:a total of 84 male Wistar rats were divided into 7 groups with 12 each. The rats in group 1 to 7 were orally received hydrotalcite,Marzulene-S,gefarnate,sucralfate,rebamipide or normal saline for 3 days,respectively.On day 4,the rats were given 1 ml of absolute ethanol.The length of gastric lesion were measured by ulcer index.② Aspirin model:the rats were received 300 mg/kg of aspirin and 0.1 mol/L hydrochloric acid (0.5 ml/100 g).The following procedures were as ①.③ Hydrochloric acid model:the rats were received 1 ml of 0.7 mol/L hydrochloric acid. The following procedures were as ①. ④ Prednisolone model: all groups were administrated with above 6 agents or normal saline for 5 days.During the 2nd-5th day,the rats were subcu aneously injected with prednisolone (250 mg/kg) daily. Rats were killed on 5th day,and the lesions were mcasured by ulcer index.Gastric mucosal tissue of No.1,5 and ]0 rat in the control group and the hydrotalcite group were picked up to measure the intercellular space width using transmission electron microscopy. Results In four kind of models,the ulcer index were significantly lower in rats treated with mucosal protective agents than that in the controls (P＜0.05),expecially in hydrotalcite group (P＜0.01).The width of intercellular space in the hydrotalcite group was significantly narrower than that in controls (P＜0.05).Conclusions All of the mucosal protective agents can be against the gastric mucosal lesion induced by ethanol,hydrochloric acid,aspirin or prednisolone.Among them,the hydrotalcite is even better.The effect of hydrotalcite is further confirmed by observation of intercellular space width.

Objective To compare and analyze gene expression patterns in rat model of nonalcoholic fatty liver disease (NAFLD).Methods Twelve male Sprague-Dawley rats were randomly given either general diet (control group) or a high-fat diet (model group) for 4 weeks.The histopathologic changes of the liver were observed and gene expression patterns were analyzed and compared by cDNA mieroarray.Results Hepatocellular steatosis and inflammatory infiltration were observed in model group after high-fat diet for 4 weeks.Fifty-one differential genes were found in model group,20 of which were up-regulated (sterol regulatory element binding factor 1,stearoyl-coenzyme A desaturase 1 and Bcl 2 modifying factor)and 31 were down-regulated (peroxisomal enoyl coenzyme A hydratase 1,heat shock 70 protein 1A and ATPase inhibitory factor 1). The up-regulating genes were involved in lipogenesis and cell apoptosis,while down-regulated genes were involved in fatty acid oxidation, protein modification and energy metabolism.Conclusions The differential expression of genes may involve in the pathogenesis of NAFLD.

Objective To investigate the association of serum lipid,lipoprotein,apolipoprotein,leptin,cholecystokinin(CCK)and bile lipid with cholesterol gallstone formation.Methods The patients with gallstone were divided into cholesterol(n=99)and non-cholesterol(n=57)gallstone groups by infrared spectometry.And 52 healthy volunteers were served as control group.The concentrations of serum cholesterol,triglyceride,high and low density lipoproteins,apolipoprotein(Apo),leptin and CCK were measured and compared among three groups.The levels of total bile cholesterol,bile acid and lecithin were also detected.Results The concentrations of serum triglyeeride and total cholesterol in two gallstone groups were higher than those in control group(P value all＜0.01).The level of Apo-B in cholesterol gallstone group was higher than that in control group(P=0.017).While the concentrations of high density lipoprotein and CCK were significantly lower in two gallstone groups than those in control group(P value all=0.000).Serum leptin was higher in male patients compared to controls(P＜0.05).The bile cholesterol saturation index in two gallstone groups was above 1.Conclusions The changes of serum CCK,triglyceride,total cholesterol,high density lipoprotein,Apo-B and leptin may be correlated to the formation of gallbladder gallstone.

Objective To evaluate the diagnostic value of esomeprazole test in patients with gastroesophageal reflux disease.Methods Consecutive patients with heartburn and/or acid regurgitation in three medical centers were enrolled in a prospective,randomized,double-blind study with a placebo-control design.After upper endoscopy examination,patients were divided into non-erosive reflux diseases and erosive esophagitis.All patients underwent 24-hour ambulatory esophageal pH monitoring.Those who were diagnosed as gastroesophageal reflux diseases had either esophagitis under endoscopy or abnormal esophageal acid exposure in 24-hour ambulatory esophageal pH monitoring.The patients were randomly divided into treatment group and control group.The patients in treatment group were received 40 mg of esomeprazole daily while the patients in control group were given placebo once daily for 14 days.The severity and frequency of heartburn were recorded both by doctors and patients before and during treatment.Results Two hundred and seventeen patients were completed the study(105 patients in treatment group and 112 patients in control group).If the symptom of heartburn which disappeared in the sixth and seventh day of the first week,it was defined as positive for esomeprazole test,the sensitivity and specificity in treatment group were 87.7% and 42.5%,respectively If the symptom of heartburn disap peared in the second week,it was defined as positive for esomeprazole test.The corresponding sensitivity and specificity in treatment group were 84.6% and 45%,respectively.The Youden index was 0.362 and 0.296 for criteria of one and two weeks,respectively.If the heartburn score improved by more than 50%,75% or 100% from the baseline score after treatment,it was defined as positive for esomeprazole test,the sensitivity and specificity were 95.4% and 32.5%,87.7% and 32.5%,84.6% and 45%,respectively.Conclusions The esomeprazole test has high value in diagnosis of GERD with sensitivity of 87.7% and specificity of 42.5%.Positive definition of heartburn disappeared in the sixth and seventh day is superior in cost-effective.

Objective To explore the role of a novel regulatory molecule-microRNA in the hydroxycamptothecin-resistant human colon cancer cell line SW1116/HCPT in order to provide a new reversal target for muhidrug resistance.Methods MicroRNA expression profiling in the hydroxycamptothecin-resistant human colon cancer cell line SW1116/HCPT were detected by microRNA array using microRCURYTM LNA Array V8.1 to screen multi-drug resistance(MDR)-related microRNAs.Specific stem-loop primers were used for reverse-transcribing cDNA and the expression of some MDR-related microRNAs were analyzed by the real-time PCR.Results The absorbance ratios of total RNA used for total RNA preparation was further confirmed by denaturing agarose gel electrophoresis.Compared to SW1116,28 microRNAs were down-regulated and 36 microRNAs were up-regulated in SW1116/HCPT cell line.The expression of two down-regulated microRNAs(hsa-miR-452 and hsa-miR-373*)and one up-regulated microRNA(hsa-miR-506)were confirmed by real-time PCR.The results of hsa-miR-452 and hsa-miR-506 were consistent with microRNA array nalysis,however,the expression of hsa-miR-373* may play a key role in the process of hydroxycamptothecin-resistant human colon cancer cell line SW1116/HCPT.

Objective To observe the therapeutic effects of recombinant human granulocyte colony stimulating factor(rhG-CSF)on CCl4 induced chronic liver injury.Methods Male BALB/C mice were randomly allocated into treatment and control groups.The mice model were established by injection with daily for 7 days,while the control mice were received the same volumes of saline.The mice were sacrificed to get weight,liver mass and spleen mass.The count of CD34+ cells and Thy-1+ cells were analyzed by flow cytometry and immunohistochemical staining,respectively.Results The ratio of liver/spleen was 15.94±1.20 and 10.52±0.66 on day 8 and 15 in treatment group,respectively,while those were 7.14±1.68 and 8.31±1.71 in control group,respectively(all P value＜0.05).But there was no significant difference in body weight and liver mass between two groups(P＞0.05)The concentration of album in treatment group was raised rapidly on day 15.The concentrations of alanine aminotransferase (ALT),aspartate aminotransferase(AST),hyaluronic acid(HA)and laminin(LN)on day 30 were significantly lower in treatment group compared to control group(P＜0.05).There was significant difference in score of liver fibrosis on day 30 between two groups(treatment group:5.49±2.16,control:8.74±1.86,P＜0.05).The number of CD34+ cell and Thy-1+ in treatment group(on day 8:9.54±2.24 and 5.10±1.25 and on day 15:8.18±1.93 and 7.53±1.39,respectively)were higher than those in control group(on day 8:5.40±0.99 and 3.25±0.75;on 15 days:4.46±0.77 and 3.35±0.86,all P value＜0.05).Conclusion The rhG-CSF may improve the reparation of chronic liver injury,and may provide a novel method in treatment of liver fibrosis.

Objective To analyze the clinical presentation of functional dyspepsia in Chinese ado lescents.Methods A stratified,randomized study by cluster sampling was employed,which recruited 51 956 students from high and primary schools in six provinces and two cities.All students were requested to fill in a questionnaire.Functional dyspepsia was diagnosed according to Rome Ⅱ criteria.Results Among 51 956 students,10 174 were diagnosed as functional dyspepsia(accounted for 19.58%).Heart burn,hiccup and air swallowing to terminate hiccup were major symptoms of functional dyspepsia.The upper abdominal distention,epigastric pain,anorexia and insomnia were common in boys than girls with no significance(P＞0.05).The belching,early satiety,fatigue and anxiety were significantly higher in girls than boys.Conclusions Functional dyspepsia is a common disorder among the adolescents.Educa-tion and psychotherapy are important in the treatment of students with functional dyspepsia.

Objective To investigate the trends in incidence and mortality of esophageal cancer from 1981 to 2002 in Tianjin,China and to predict future trends and facilitate future prevention.Methods All new cancer cases registered in the Tianjin Cancer Registry between 1981 and 2002 were reviewed.Yearly age-specific,crude and age-adjusted incidence rates were calculated for males and females.Secular trends of incidence and mortality were indicated by the estimated annual percentage change(EAPC).Results A total of 8206 cases of esophageal cancer were reported in Tianjin form 1981 to 2002,with 5533 males and before 45 years,but increased rapidly after 45 years.The median age of esophageal cancer cases was 69 years,with quartile range from 62 to 75 years.The peak for age specific incidence in females was 75-80 years,which was earlier than that in males(aged 80-85).But recent data indicated that the peak age in females had increased and became similar to that of the males.The crude and age-standardized incidence rates(ASIR)of esophageal cancer decreased in last 22 years.For male and female,crude incidence decreased by 2.22% and 3.56% per year and ASIR decreased by 5.18% and 6.56% per year.The mortality of esophageal cancer decreased in the last 22 years.Conclusion The incidence of esophageal cancer decreased in the last 22 years in Tianjin,but there is little overall improvement in survival.