Objective To investigate the metabolism and function of the intestinal microbiota from liver cirrhosis patients.Methods Sixteen cases of liver cirrhosis and twenty normal individuals were selected , whose intestinal microbiota metagenomic DNA was extracted , followed by high-throughput Solexa sequencing and the bioinformatics analysis of metabo-lism and function annotation to compare the differences between the patients and normal subjects and find out about the cir -rhosis-related functions .Results The functional diversity was significantly reduced in the intestinal microbiota of cirrhotic patients.At the module or pathway level , the intestinal microbiota of patients showed an enrichment in metabolisms of drugs, essential amino acid , propanoate metabolism and inflammatory reaction , whereas an opposite tendency was observed in the metabolic ability of butyrate , bile acid and cell cycle .Conclusion Under the influence of liver cirrhosis , the growth environment in the intestine is destroyed , causing, the intestinal microbiota the exhibit some compensation to adapt to the changed intestinal micro-environment .

Objective To investigate the effect of Valsartan on Disintegrin metalloproteinases (ADAMs10,17) expressions in the process of heart failure (HF) after myocardial infarction (MI).MethodsAdult male Wistar rats weighing (200 ± 30) g were given humane care in compliance with the rules of the Animal Experimentation Committee of the first hospital of Harbin Medical University.And then the left anterior descending coronary artery was ligated.Based on UCG (LVEF ＜ 45％) Results The successfully MI-operated Wistar rats were divided randomly (random number) into three groups:HF group (HF group),placebo group (Pla group) and valsartan group (Val group).The rats in the Pla group and Val group were given the same volume of normal saline and valsartan 50 mg/ (kg · d),provided by Novartis company) by gavage.After 16 weeks,heart function was assessed by hemodynamic evaluation and serum TNF-α from LV cavity was measured by ELISA (R&D,USA).Muscle samples were extracted from the ischemic zone,and then the ADAMs 10,17 expressions were measured by immunoblotting.All the data were expressed by mean ± standard and evaluated by Student' s t test.Results After 16 weeks,the data of LV function including LVdp/dt LVdp/dtmin and LVSP were significantly improved in Val group than the others (P =0.006,P =0.015,P =0.003),and the LVEDP level was decreased (P =0.002).At the same time,the TNF-o level in the Val group was lower than that in the HF group (P =0.023).The ADAM17 and TNF-R1 expressions in the Val group was reduced compared with those in the HF group (P =0.01 1,P =0.022).However,ADAM10 expression is unchangeable in the four groups.Conclusions Valsartan may reduce the ADAM17 and TNF-R1 expressions in the ischemic zone,decrease the TNF-αconcentration and function in LV cavity so as to inhibit cardiac remodeling and improve heart function after MI.

Objective To establish a multiplex loop-mediated isothermal amplification(mLAMP)method for simultaneous detection of Salmonella,Vibrio parahaemolyticus (VPH)and Listeria monocytogenes (LM).Methods Three sets of mLAMP primers were designed to specifically target bcfD of Salmonella and tlh of VPH and iap of LM.The respective single LAMP assay of the three kinds of bacteria was developed,and the ratio of primer concentration was optimized to develop a multiplex LAMP system.The specificity and sensitivity of multiplex LAMP were observed.Results Turbidity monitoring results in real time suggests that the mLAMP was highly specific and amplification could be obtained within 45 min under isothermal conditions.The sensitivity of this mLAMP was found to be 300 fg/μl genomic DNAs for Salmonella and 4.2 pg/μl for VPH and 4.5 pg/μl for LM,which was consistent with conventional PCR.Conclusion The mLAMP described can potentially facilitate simultaneous detection of three kinds of bacteria in a large number of food samples, which could be used as a primary screening method and as a supplement to classical detection methods.

Objective To establish a polymerase spiral reaction (PSR) method for rapid detection of influenza A/H1N1 virus.Methods Six sets of primers were designed for influenza A/H1N1 virus HA gene, and the results were determined with real time kinetic turbidimetric assay and colorimetry method.Results and Conclusion The best primers were selected from six sets of primers, and the best temperature was determined as 65 degrees Celsius.Further experiments showed that the best primer had good specificity for detection of influenza A/H1N1 virus,without cross reactions with 14 other respiratory tract pathogenic nucleic acids.The sensitivity was up to 100 copies,and consistent with that of PCR.So a PSR method is established for rapid detection of the influenza A/H1N1 virus, which is simple, quick, highly specific and sensitive,and especially applicable to field and grass-roots units.