Objective Based on the observation of the changes of symptoms, histopathology, visceral sensitivity, mast cell activation, autophagy, and Beclin-1 and Claudin-2 expression in rats, we established and evaluated a new rat model of diarrhea-predominant irritable bowel syndrome (D-IBS) induced by restraint-stress combined with capsaicin (CAP) administration.Methods Forty healthy 5-week old male Sprague Dawley (SD) rats were randomly divided into normal group, model group I, model group II and model group III, with 10 rats in each group.The D-IBS model was established by restraint-stress combined with intragastric administration of CAP (2 mL/100 g body weight, 0.125% in group I, 0.250% in group II, 0.500% in group III), tail clipping and forelimb restriction for 30 minutes every day for 2 weeks.The rats in the control group were treated with saline for 2 weeks.The number of contraction of abdominal wall and arched back were measured by Power Lab instrument.The mast cell activation was detected using aldehyde-magenta-orange G staining.Light and electron microscopic examinations were performed to detect the morphology and autophagy of colonic tissues.The expressions of Beclin-1 and Claudin-2 in the colonic mucosa were detected by streptavidin-biotin complex (SABC) immunohistochemical staining.Results All rats in the model group III died during the experiment.Compared with the control group and model group I, the stool frequency was increased and the visceral sensitivity threshold decreased in the model group II, and there were statistically significant differences between the model group II and the control and model groups I (P < 0.05).The colonic mucosa, mucosal epithelium and glands in each group showed normal morphology and there was no submucosal vasodilatation and diffuse inflammatory cell infiltration.Except for the control group, round purple-reddish staining spots were observed in the rat mucosal stroma or submucosa in the model groups I and II, indicating an increased expression of mast cells.The autophagy, expressions of Beclin-1 and Claudin-2 in the colonic epithelium were significantly increased in the model group II compared with control group and model group I (P< 0.05).Conclusions The model of D-IBS induced by restraint-stress combined with capsaicin is characterized by increased diarrhea, visceral hypersensitivity, increased mast cell expression and autophagy of intestinal epithelial cells, and disruption of the intestinal mucosal barrier.This model is simple to set up and shows similar symptoms of human irritable bowel syndrome.Therefore, it is worthy of popularization and application.

Totally 79 obese children and 64 children with normal body weight were included in the present study.Serum apolipoprotein A5 (ApoA5) and leptin levels were determined by ELISA and fasting insulin by RIA.The clinical data including height,body weight,waist circumference,blood pressure,blood lipid,blood glucose,etc,were collected.Homeostasis model assessment of insulin resistance (HOMA-IR) was calculated.The results showed that compared with normal weight children,both serum leptin and insulin levels were significantly raised in obese children [19.15 (13.01 ～ 25.08) ng/ml vs 3.29 (1.45 ～ 6.02) ng/ml and 15.44 (12.05 ～ 20.26) μg/L vs 10.12 (8.60 ～ 12.60) μg/L,both P＜0.01],while ApoA5 level was significantly lowered [134.5 (105.9 ～ 172.7) ng/ml vs 2005.9(164.3 ～ 265.3) ng/ml,P＜0.01].Serum ApoA5 was negatively correlated with serum leptin and insulin (both P＜0.01).

Objective To investigate the blood and chest fluid level of Th17 cell and IL-17 in patients with tuberculous pleural effusion and its pathological role.Methods Flow cytometry and enzyme linked immunosorbent assay (ELISA) were used to measure the blood and chest fluid level of Th17 cell and IL-17 from 30 patients with tuberculous pleural effusion,20 patients without tuberculous pleural effusion,and 20 healthy persons.Results The blood level of Th17 cell and IL-17 wwere higher in tuberculous pleural effusion than in the other two groups(P ＜0.05).The chest fluid level of Th17 cell and IL-17 in patients with tuberculous pleural effusion were significantly higher than those in patients without tuberculous pleural effusion (P ＜ 0.05 ).The chest fluid level of Th17 cell and IL-17 in patients with and without tuberculous pleural effusion were significantly higher than that of the blood serum level.After treatment for 1,3,7 and 14 days,tbe blood serum and chest fluid level of Th17 cell and IL-17 were obviously lower.( P ＜ 0.01 ).After treatment for 1 day,the blood level of Th17 cell was obviously lower than before treatment( P ＜ 0.01 ).After treatment for 3 days,the chest fluid level of Th17 cell was obviously lower than before treatment( P ＜0.01 ).After treatment for 3 days,the blood serum level of IL-17 was obviously lower than before treatment (P ＜ 0.01 ).After treatment for 7 days,the chest fluid level of IL-17 was obviously lower than before treatment ( P ＜0.01 ).Conclusion Th17 cell and IL-17 might play an important role in the pathogenesis of tuberculous pleural effusion and they were correlated with disease progression and the therapeutic effect.

Objective To investigate the therapeutic effects of mesenchymal stem cells (MSC) on rat fulminant hepatic failure (FHF). Methods The rat MSC were separated and purified by adherent culture of whole bone marrow cells. The rat FHF models were established by CCl4 intragastric administration.The rats were divided into experimental group (n=20) and model control group (n=20).And the same dose of saline was administered to rats as normal controls (n=8).Dosage of 1.0 × 106 4',6-diamidino-2-phenylindole (DAPI) labeled MSC were transplanted into rats in experimental group and normal control group through caudal veins,and the same dose of saline was given intravenously in model control group.Part of rats in each group were sacrificed after 7 days and 14 days of injection to evaluate the general condition,survival rate,liver function,tumor necrosis factor (TNF)-α level,liver pathology and MSC homing to the liver between experimental group and model control group.Normal distribution data were compared by independent-sample t test and nonnormal distribution data were analyzed by non-parameter test.ResultsAfter 3 days of injection,the generalcondition of experimental group were better than the model control group. After 7 days of injection,there were 15 and 8 survival rats,the survival rates were statistically different between experimental group and model control group (x2 =4.122,P＜0.05).After 7 days and 14 days of injection,the liver function and TNF-α levels were statistically different between experimental group and model control group (both P ＜0.05),and liver pathology improvement in experimental group was more significant than model control group.DAPI labeled cells increased after transplantation in experimental group, whilefewDAPIlabeledcellswere observedinnormalcontrolgroup.ConclusionsMSC can home to liver of FHF rats after MSC allogeneic transplantation through caudal veins,which can improve liver immunity and liver tissue necroinflammation,and facilitate recovery of liver function.Therefore,it is demonstrated that MSC transplantation has obvious therapeutic effect on rat FHF.

OBJECTIVE: To evaluate the efficacy of specific immunotherapy (SIT) with standardized house dust mite allergen preparation for allergic rhinitis (AR). METHOD: Fifty-five patients with allergic rhinitis caused by house dust mites were selected in this self-control study. Clinical efficacy was evaluated by symptom and sign score after two years of specific immunotherapy and compared with pre-treatment scores. RESULT: After completing the study, a clinically significant reduction in symptom and sign score in these patients was noted, compared with that of pretreatment. And the difference was statistically significant (P < 0.01). CONCLUSION Standardized house dust mite allergen preparation is an effective treatment in patients suffering from allergic rhinitis due to house dust mites.
Allergens ; therapeutic use ; Animals ; Antigens, Dermatophagoides ; therapeutic use ; Female ; Humans ; Immunotherapy ; methods ; Male ; Pyroglyphidae ; immunology ; Rhinitis, Allergic ; therapy ; Treatment Outcome

Objective To understand the epidemiological characteristics of norovirus detection based on the diarrhea syndromic surveillance in Pudong ,Shanghai .Methods Diarrhea syndromic surveillance program was conducted in outpatient and emergency departments of 12 sentinel hospitals during 2012 -2016 .The clinical and epidemiological data of diarrheal patients were collected .The fecal specimens were also sampled . The detections for norovirus by polymerase chain reaction and gene sequencing were performed .Chi-square test or Fisher exact probability test was used to compare the detection rate .Binary logistic regression was used to explore the impact factors of norovirus infection among diarrheal patients . Results The detective rate of norovirus among diarrheal patients was 21 .59％ ,peaking from October to next March .Among all the age groups ,the detection rate was highest among patients with 25 - 64 years old .The patients with more severe diarrhea symptoms (> 5 times a day) were more likely to be infected with norovirus than those with diarrhea 3 - 5 times a day (χ2 = 21 .167 ,P< 0 .01) .Vomiting was also an indicator of norovirus infection .Patients presented with vomiting had a higher norovirus detection rate (χ2 = 198 .543 , P < 0 .01) . Norovirus G Ⅱ was the predominant genotype .Conclusions The recent epidemic of norovirus infection in diarrheal patients in Pudong new district has an apparent seasonality peaked from October to next March .Adult ,patients with vomiting and more severe diarrhea symptoms are at risk of norovirus infection .The long-term surveillance is critical for the norovirus infection control .