Aloe vera has shown extensive actions, such as anti-tumor, anti-inflammation, anti-bacteria, enhancing immune function, and anti-gastric mucosal lesion. It may be widely developed as medical products.

AIM: To study the effect of garlicin on protecting nonalcoholic fat liver in rats induced by high fat diet and explore the pathogenesis involved. METHODS: According to the dosage of garlicin and diet, fifty SD rats were randomly divided into five equal groups: normal control group, model control group and garlicin (10, 20, 30 mg/kg) groups. Apart from the rats in normal control group, the rats were all fed with high fat and high cholesterol diet. After 12 weeks, the levels of serum endotoxin (ETX), total cholesterols (TC), triglyceride (TG), superoxide dismutase (SOD), malondialdehyde (MDA), transaminase and free fatty acids (FFA) were detected. The levels of MDA, SOD, glutathione hormone (GSH) in hepatic tissue were also detected. Then the features of live pathology were observed. RESULTS: The levels of ETX, TC and TG in garlicin groups were significantly lower than those in model control group (P

OBJECTIVETo investigate effects of exogenous hydrogen sulfide ( H2 S) on the spatial memory disorder induced by cerebral anoxia in mice and explore related mechanism.METHODS Sodium nitrite (NaNO2) 120 mg·kg-1 was sc given to mice for4 d in model group.Sodium hydrosulfide (NaHS) 1 mg·kg-1 was ip given and NaNO2 120 mg·kg-1 simultaneously was sc given to mice for4 d in NaHS group.All drugs were given to mice immediately after Morris water maze experiment every day and escape latency.The number of crossings over the target area (NCTA) and search time in target quadrant (STTQ) were recorded.The activity of superoxide dismutase (SOD) and malondialdehyde (MDA) level in the brain was determined with colorimetry.The morphological alterations in hippocampus slices were assessed by microscope.RESULTSOn the third and fourth days in Morris water maze experiment,compared with ( 16.1 ±9.6)s and ( 11.1 ±6.2)s in normal control group,the escape latency in model group was longer,(26.0 ±7.3)s(P＜0.05) and (23.3 ±8.7)s(P＜0.01).On the fifth day,compared with 7.2 ± 1.6 and (28 ± 8) s in normal control group NCTA and STTQ in model group were 4.1 ± 1.9and (20 ± 8 ) s ( P ＜ 0.05 ),and they were obviously less.Compared with normal control group,SOD activity and M DA content of mice in model group were reduced by 12.6％ (P ＜ 0.01 ) and increased by 43.9％ (P ＜ 0.01 ),respectively.The neuron degenerative changes including karyopyknosis,dark cytoplasm and irregular pyramidal layer were observed in model group.On the third and fourth day,compared with model group,the escape latency in NaHS group was shorter,(17.9 ±7.0)s and (15.8 ±8.5)s (P＜0.05).Compared with model group,NCTA and STTQ in NaHS group increased to 6.7 ± 2.5 and ( 30 ± 9) s ( P ＜ 0.01 ).SOD activity and MDA content in NaHS group were increased by 8.9％ ( P ＜ 0.05 ) and reduced by 29.6％ ( P ＜ 0.01 ),respectively.Neuron degeneration was significantly attenuated in NaHS group (P ＜ 0.01 ).CONCLUSIONNaHS can attenuate the spatial memory disorder induced by cerebral anoxia and the mechanism may be related to the antioxidation effect and alleviation of neuron damage of H2S.

Objective To evaluate the diagnostic value of endoscopic ultrasonography (EUS) for submucosal tumors in upper gastrointestinal tract, and its influence on choice of endoscopic therapies. Methods A total of 82 submucosal tumors from upper gastrointestinal tract were examined by EUS, and treated by various endoscopic therapeutic techniques including fulguration with high frequency current ( FHFC), endoscopic mucosal resection (EMR) and endoscopic band ligation according to orion, size and property of the lesion. The diagnoses of 58 reseeted samples were determined by routine pathological examination and immunohistochemistry. All patients were followed up with routine endoscopy and EUS. Results FHFC was applied in 26 lesions originated from muscularis mucosa, EMR was used in 17 flat lesions originated from muscularis mucosa, and endoscopic band ligation in 38 lesions from muscularis propria and 1 tumor from muscularis mucosa. The diagnostic accuracy of EUS was 91.4% (53/58). Except for post-operative bleeding in 1 patient, no other complications were observed. A total of 79 cases were followed up for 3-24 months, and no recurrence was found. Conclusion EUS can display the origin and property of submucosal tumors in upper gastrointestinal tract and guide the selection of endoscopic therapy, which is effective and safe in treatment of submucosal tumor in upper gastrointestinal tract.

Objective To investigate the roles of transforming growth factor(TGF)-β1 gene polymorphisms in severe acute respiratory syndrome-coronavirus(SARS-CoV)infection and the interstitial lung fibrosis after recovered.Methods Sixty-five recovered SARS patients,37 health care workers and 66 healthy controls were enrolled in this case-case study.The association between genetic polymorphisms of TG F-β1 and suscept ibility to SARS or interstitial lung changes after SARS reco,vered was carried out.Polymerase chain reaction-sequencing based typing(PCR-SBT)method was used to determine the polymorphisms of TGF-β1 gene at locus+869 and+915.Data were analyzed using t test and chi square test.Results There was no significant association of TGF+β1 gene polymorphisms at locus+869 and+915 in recovered SARS patients,health care workers and heahhy controls.And gene linkage of this two loci was not related with SARS-CoV susceptibility.Furthermore,no association between interstitial lung changes in recovered SARS palients and TGF-β1 gene polymorphisms or genetic linkage of this two loci.Conclusions It may not be related between TGFβ1 gene polymorphisms at locus+869 and+915 and SARS-CoV susceptibility.And interstitial lung changes in recovered SARS patients may not be influenced by TGF-β1 gene polymorphisms.

Apoptosis is one of the important forms during cerebral ischemia.Phosphoinositide-3 kinase (PI3K)/serine/threonine kinase (Akt) is the important cell survival signaling pathway,while c-jun N-terminal kinase (JNK) is the important pro-apoptotic signaling pathway.The dynamic equilibrium of the two signal transduction pathways maintains cell survival and apoptosis under the physiological state.Stimulation during cerebral ischemia breaks this physiological balance and results in the apoptosis of massive neurons.A variety of proved neuroprotective factors are associated with the amplification of enhancement of cell survival signal or inhibition of apoptosis signal,and thrus maintain the balance between the two signal pathways.

Objective To investigate the risk factors of standard selectivity biliary cannulation in endoscopic retrograde cholangiopancreatography (ERCP) for patints with choledocholithiasis,and the effect and safety of assistant cannulation methods.Methods The clinical data were retrospectively analyzed in 372 patients,who received ERCP for choledocholithiasis in the Yijishan Hospital of Wannan Medical College from January 2014 to December 2014.The risk factors of standard biliary cannulation were assessed by univariate and multivariate logistic regression analysis.The success rate of assistant biliary cannulation and the incidence of post-ERCP pancreatitis (PEP) of standard biliary cannulation were compared with doubleguide wire technique (DGT) and precut sphincterotomy (PS),which were used when standard biliary cannulation failed.Results The univariate analysis showed that floppy and long duodenal papilla (P=0.000),angulated common bile duct(P=0.013) were related to failure of standard biliary cannulation.Multivariate analysis showed that floppy and long papilla (P=0.000,OR=0.131,95％CI:0.056-0.307),angulated common bile duct (P =0.003,OR =0.378,95 ％ CI:0.197-0.726) were independent risk factors for standard biliary cannulation.The success rate of standard biliary cannulation was 83.3％ (310/372),62 cases undergone DGT or PS after standard biliary cannulation failure,and the total success rate of cannulation was 99.7％ (371/372).There were 29 cases suffered from PEP in 371 successful cases of biliary cannulation,including 18 cases (5.8％,18/310) of standard biliary cannulation,8 cases (16.3％,8/49) of DGT,and 3 cases (25.0％,3/12) of PS.The incidence of PEP by DGT (x2 =5.532,P =0.019) and PS (x2 =6.994,P=0.008) was significantly higher than that of standard biliary cannulation,but there was no statistical difference on the incidence of PEP between DGT and PS (x2 =0.079,P =0.778).Conclusion Floppy and long duodenal papilla and angulated common bile duct could easily induce the failure of standard biliary cannulation in ERCP for patients with choledocholithiasis.DGT and PS are effective assistant cannulation methods when the standard cannulation fails.

Objective To analyze the incidence of BK virus (BKV) infection after kidney transplantation in our center and to evaluate the efficacy and safety of conversion treatment with Mizoribine (MZR) on BKV infection after kidney transplantation.Methods The information of recipients who received BK virus screening in hospital or outpatient during 2015-02 to 2016-12 in our center was retrospectively analyzed.The recipients positive for BKV were divided into experiment group (given conversion treatment with MZR) and control group (not given MZR conversion) according to the inclusion criteria.The negative rate of BKV,AR,hyperuricemia and the function of renal allograft during the conversion treatment with MZR were observed.Results 182 recipients accepted BKV screening during 2015-02 to 2016-12 and 68 cases were positive.The positive rate of BKV was 38.5 ％.The positive rate of peripheral blood specimens and midstream urine specimens was 7.1％ and 36.8％ respectively.Twelve recipients were positive for BKV in both peripheral blood specimens and midstream urine specimens.There were 27 recipients in experiment group and 36 cases in control group.Fourteen recipients positive for BKV became negative after MZR conversion in experiment group and the negative rate was up to 51.9％.The mean time of negative rate was 3.2 ± 2.7 (1-10) months after MZR conversion.During the conversion treatment with MZR,AR occurred in 1 case and was reversed by the impact therapy with Thymoglobulin in experiment group.The value of serum uric acid was maintained stable before and after MZR conversion under the action of uric-acidlowering drug.The renal function was kept stable in both experiment group and control group after renal transplantation.No deaths and renal allograft failure cases occurred in both groups during the research period.The 2-year survival rate for patients and kidneys was both 100％.Conclusion The incidence of BKV infection after kidney transplantation was high and the treatment scheme of MZR conversion was safe and effective.

Aim To test the skin healing and repairing efficacy and the mechanism of Hibiscus rosa-sinensis L bud extract by using the animal models. Methods KM mice were randomly divided into three groups:the model group, the positive control group, and the n-bu-tyl alcohol extract ( HrBN) group. Using the boils and carbuncles model, the healing condition of all the animals were observed. KM mice were kept in the SPF condition room and divided into five groups: the model group, the positive control group, and the low, middle, high dose groups. Using the full-thickness loss model, the repairing results of all the mice were ob-served. Through the antimicrobial test, the results of MIC and inhibition zone were obtained. The carbon clearance test was used to collect the blood at the time 5min and 15min, and get the liver and spleen, and the results of K andαwere obtained. Results In vivo ex-periments showed there was significant difference be-tween groups;the HrBN extract had the outstanding ef-ficacy in healing and repairing skin boils and full-thickness loss models. It had higher recovery rate than other ethanol extract, such as ethyl acetate extract and chloroform extract. In vitro experiments showed that the HrBN extract, ethyl acetate extract ( HrBE) ,AB-8 macroporous resin 30% alcohol part and 60% alcohol part had obvious antimicrobial efficacy. The carbon clearance test showed HrBN had a good effect in im-proving immune function, and it can increase the K and α. Conclusion HrBN in animal models exerts good skin healing and repairing efficacy, which might be related to its antibacterial activity and immunologic enhancement function.

ObjectiveTo investigate the possible mechanisms for biocompatibility of chitosan material using agarose/chitosan blended hydrogels as a model.Methods A series of agarose/chitosan blended hydrogels with different chitosan content were prepared by the blending method.The chemical groups of the blended hydrogels were analyzed by the Fourier transform infrared (FTIR) spectroscopy.The blending compatibility between the agarose and chitosan was evaluated with the fluorescein-4-isothiocyanate (FITC) staining method.The charge of the blended hydrogels was determined by the zeta potential measurement.The adsorption of total fetal bovine serum (FBS) proteins and bovine serum albumin (BSA) on the blended hydrogels was measured by the bicinchoninic acid (BCA) method.The adsorption of fibronectin (FN) on the blended hydrogels was measured with ELISA.Cell culture experiment adopted human microvascular endothelial cell line (HMEC-1) as the model.The cytocompatibility was studied by evaluating adhesion,proliferation,and morphology of the cells on the blended hydrogels.Results Characteristic chemical groups of chitosan could be detected in the agarose/chitosan blended hydrogels.The chitosan had a good blending compatibility with the agarose.The amino groups of chitosan were uniformly distributed in the blended hydrogels.The blended hydrogels were strongly positively charged at acidic pH (pH 3.0),however,the zeta potentials of all the hydrogels were reduced to nearly 0 mV at neutral pH (pH 7.4).There were no significant differences in the adsorption of total FBS proteins and BSA between the blended hydrogel groups.However,the adsorption of FN on the hydrogels significantly increased with the increase of chitosan content.Cell culture experiment indicated that the cytocompatibihty of the blended hydrogels was significantly improved with the increase of chitosan content.The HMECs exhibited higher levels of adhesion,spreading,and proliferation on the hydrogels with higher chitosan content.ConclusionResults in this study indicated that the chitosan component preferentially adsorbed FN compared to the other serum proteins,leading to adhesion and spreading of the cells on the blended hydrogels.In contrast to prevailing views,it was found in the present study that the biocompatibility of chitosan did not relate to its positive charge.