Objective To study the influence of carbon dioxide (CO2)gas temperature on recovery of patients after laparoscopic gastrointestinal operation.Methods 100 cases with gastrointestinal operation patients were selected and randomly divided into the experimental group and the control group with 50 patients in each.In the experimental group,pneumoperitoneum was established with CO2 gas heated to 37 ℃,and the control group used routine method to establish pneumoperitoneum.The items such as postoperative tracheal extubation time,anal exhaust time and extubation time were observed in two groups of patients.Results The endotracheal tube extubation time,anal exhaust time and extubation time in the experimental group were earlier than those in the control group.Conclusions Using CO2 gas heated to 37 ℃ to establish pneumoperitoneum during laparoscopic gastrointestinal operation can effectively promote the rehabilitation of patients after operation.

Objective To explore the application value of tissue dispersion quantitative analysis in rat liver fibrosis stages and provide a reference for clinical non-invasive diagnosis of liver fibrosis.Methods Seventy-two male Wistar rats were randomly divided into experimental group (n =64) and control group (n =8).The experimental groups of rats were gavaged with the volume fraction of 60％ CCl4 olive oil solution to form different stages of liver fibrosis,the control group did wvith normal saline,All the rat underwent tissue dispersion quantitative analysis to obtain 12 elastic parameters,the differences in above parameters were compared among rats with different liver fibrosis stages,then the correlation with pathological stages were analyzed.Results Except for COMP,ASM,CORR,there were significant differences in all parameters among rats of different liver fibrosis (P ＜0.05),which were correlated with pathological stages(P ＜0.05).Among these parameters,％ AREA had the highest correlation coefficient (r =0.891,P =0.001).The ROC curve was made by ％AREA to estimate the fibrosis stage.the area under ROC curve for ％ AREA was 0.914 (≥ the control group + S0),0.963 (≥early liver fibrosis S1 + S2),0.969 (≥middle liver fibrosis S3),0.948 (early cirrhosis S4),respectively.Conclusions The technique of tissue dispersion quantitative analysis has a good evaluation value for liver fibrosis stages,it is able to provide a preliminary reference for clinical non-invasive diagnosis of liver fibrosis.

SARS coronavirus (SARS-CoV) is the etiologic agent of severe acute respiratory syndrome. The aim of this study was to construct Sars-CoV membrane (M), nucleocapsid (N) and spike 2 (S2) gene eukaryotic expression plasmids, and identify their expression in vitro. Gene fragments encoding N protein, M protein and S2 protein of SARS-CoV were amplified by PCR using cDNA obtained from lung samples of SARS patients as template, and subcloned into pcDNA3.1 vector to form eukaryotic expression plasmids. SARS-CoV protein eukaryotic expression plasmids were transfected respectively into CHO cells. Immunohistochemistry was employed to detect the expression of the structural proteins of SARS-CoV in transfected cells. SARS-CoV protein eukaryotic expression plasmids were successfully constructed by identification with digestion of restriction enzymes and sequencing. M, N and S2 proteins of SARS-CoV were detected in the cytoplasm of transfected CHO cells. It was concluded that these recombinant eukaryotic expression plasmids were constructed successfully, and SARS-CoV encoding proteins could activate transcription and expression of hfgl2 gene.

BACKGROUND:Spinocerebel ar ataxia type 3 (SCA3) is a typical genetic neurodegenerative disease. To establish patient-specific disease models of genetic background contributes to studying the pathogenesis and exploring therapeutic manners.
OBJECTIVE:To observe the effectiveness of neural differentiation of induced pluripotent stem cel lines induced by SCA3 and the stability of CAG copy number.
METHODS:Skin tissue of SCA3 patient was obtained clinical y, and specific skin flbroblasts were isolated and cultured. Reprogramming fibroblasts could obtain induced pluripotent stem cel s. Patient-specific induced pluripotent stem cel s, normal person induced pluripotent stem cel s (NHF) and embryonic stem cel s (ES-10) were induced to differentiate. Flow cytometry was used to compare the efficiency of differentiation. Western blot assay was utilized to detect ataxin-3 protein expression in neurons. Polymerase chain reaction was applied to measure the CAG repeat number of SCA3/ATXN3 gene.
RESULTS AND CONCLUSION:Induced pluripotent stem cel s that had identical genetic background to fibroblasts were successful y obtained, and had similar morphology and multi-directional differentiation potential to human embryonic stem cel s. Each cel line could differentiate into neural stem cel s. The CAG number did not apparently alter before and after reprogramming as wel as induction of neuronal differentiation. The effectiveness of the differentiation of induced pluripotent stem cel s derived from SCA3 into neural stem cel s was lower than that of normal person-derived induced pluripotent stem cel s (NHF) and embryonic stem cel s (ES-10). These findings demonstrate that reprogramming can successful y establish human induced pluripotent stem cel s, and induced the differentiation of above cel s into neural stem cel s. In the whole process, CAG number did not obviously alter, which was consistent with body cel s of patients.

smids were constructed suc-cessfully, and SARS-CoV encoding proteins could activate transcription and expression of hfgl2 gene.