Roles of TSA upregulation miR-4298 targeting inhibition of PADI4 expression in inducing U251 cells apoptosis / 国际肿瘤学杂志

Objective:To investigate the mechanism of microRNA-4298 (miR-4298) targeting inhibition of peptidylarginine deiminase 4 (PADI4) expression in U251 cells apoptosis induced by histone deacetylase inhibitor trichostatin A (TSA).Methods:The experiment was divided into TSA group (0.2 μmol/L TSA) and contral group. CCK8 method was used to detect the effect of TSA on the proliferation of U251 cells. Flow cytometry was used to detect the apoptosis level of U251 cells after drug action. Reverse transcription PCR and Western blotting experiments were used to determine the changes of PADI4 gene and protein expression after miR-4298 interference. Luciferase assay was used to determine the effects of miR-4298 on targeted binding and luciferase activity in the 3′UTR region of PADI4. U251 cells were transfected with PADI4 to observe the rescue effect of miR-4298 on apoptosis. Each experiment was divided into 3 groups, NC group, miR-4298 mimic group, TSA+ miR-4298 mimic group and NC group, miR-4298 inhibitor group, TSA+ miR-4298 inhibitor group.Results:U251 cells were treated with 0.2 μmol/L TSA for 4 days, the Absorbancy ( A) values of the control group was 1.168±0.148, which was higher than those of the TSA group (0.737±0.007), with statistically significant difference ( t=4.948, P=0.008). Compared with the control group, after treatment with 0.2 μmol/L TSA for 48 h, U251 cells showed obvious apoptosis (27.62%±3.49% vs. 4.99%±0.13%, t=11.190, P<0.001). Compared with those before the drug treatment, the PADI4 gene expression (0.386±0.020 vs. 0.903±0.021) and protein expression (0.276±0.041 vs. 0.777±0.031) after TSA treatment for 48 h both were decreased, with statistically significant differences ( t=30.400, P<0.001; t=16.770, P<0.001). The expression of miR-4298 during the process of TSA-induced U251 cell apoptosis increased (2.573±0.289 vs. 1.003±0.136; t=8.487, P=0.001). There was a negative correlation between the miR-4298 expression and PADI4 expression ( r=-0.877, P=0.002). Luciferase experiment confirmed that miR-4298 has targeted binding and luciferase inhibitory effects on the 3′UTR region of wild-type PADI4. Compared with NC group (0.920±0.026), the relative expression levels of PADI4 gene of miR-4298 mimic group (0.413±0.049) and TSA+ miR-4298 mimic group (0.213±0.035) were decreased, with statistically significant differences (all P<0.001). The PADI4 protein expression level change was consistent with the gene change trend. Compared with NC group (3.78%±0.68%), the apoptosis levels of miR-4298 mimic group (7.96%±1.10%) and TSA+ miR-4298 mimic group (13.74%±1.26%) were increased, with statistically significant differences ( P=0.005; P<0.001). Compared with NC group (0.183±0.025), the PADI4 gene expression of miR-4298 inhibitor group (0.483±0.032) and TSA+ miR-4298 inhibitor group (0.386±0.025) were increased, with statistically significant differences ( P<0.001; P=0.015). The PADI4 protein expression level change was consistent with the gene change trend. Compared with NC group (4.96%±0.59%), the apoptosis levels of miR-4298 inhibitor group (23.83%±2.20%) and TSA+ miR-4298 inhibitor group (9.55%±1.49%) were increased, with statistically significant differences (all P<0.001). In the rescue experiment, the expression level of PADI4 in miR-4298 mimic group was significantly increased ( P<0.001), while the expression level of PADI4 in miR-4298 mimic+ PADI4 group was relatively reversed ( P=0.002). Conclusion:miR-4298 can participate in the process of U251 cell apoptosis by targeting the expression of PADI4 gene, and miR-4298 may be the target of targeted intervention therapy for glioma.

An Exploration of the development of medical simulation teaching center / 中华医学教育探索杂志

Medical simulation teaching is an emerging and developing teaching method in our coun-try. At present, the simulation teaching centers are developing rapidly in higher education institutions, but how to improve the effectiveness in the operation of the centers is still a subject that needs to be discussed. Based on our own experience, this paper analyzes the related factors in developing medical simulation teach-ing centers, making summary and demonstrations from aspects of team building, teacher training, docking needs, staffing and so on, so as to provide references and suggestions for the construction of medical simu-lation center higher education institutions.

Meta-analysis of Shuxuening Injection in the Treatment for Cerebral Infarction / 中国康复理论与实践

@#Objective To evaluate the efficacy of Shuxuening Injection on cerebral infarction with meta-analysis. Methods The literaturesabout the clinical trials of Shuxuening Injection for the cerebral infarction published domestically between 1999 and 2009 were retrieved,the selected literatures were metaanalyzed. Results 14 articles were included in the systemic evaluation, and 12 of them wereabout the clinical efficacy, the total samples were 1016 cases, the value of odds ratio (OR) was 0.33 with the 95% confidence interval from0.23 to 0.46 (P<0.001). The consistency of the literature was well. Conclusion Shuxuening Injection is effective on cerebral infarction.

Balloon kyphoplasty combined with bone cement for the treatment of osteoporotic vertebral fracture in 58 cases / 中国组织工程研究

OBJECTIVE: To investigate the effect of balloon kyphoplasty combined with bone cement on the treatment osteoporotic vertebral fracture.METHODS: A total of 58 aged patients with single osteoporotic vertebral compression fracture (58 vertebral bodies) were treated with balloon kyphoplasty. The fracture always occurred at T_8-L_4 segment of vertebral body in particular at T_(10)-L_2 segment of thoracic waist. By local anesthesia, lateral or bilateral pedicle of vertebral arch was punctured to injection bone cement under C-arm fluoroscopy.RESULTS: Bone cement leakage occurred in 8 cases, including leakage along posterior longitudinal ligament into adjacent posterior margin of vertebral body (n=1), external edge of vertebral body (n=6), and subcutaneous tissue (n=1); however, all the patients did not have clinical symptoms. C-arm fluoroscopy showed that height of vertebral body was increased, and rachiokyphosis was improved after treatment. Pain was obviously improved, and the easement rate of pain was 100%. There was significant difference in visual simulation score, angle degree of rachiokyphosis, and living activity scale before and 6 months after treatment (P < 0.05), but there was no significant difference between 6 months after treatment and following up stopping (P>0.05).CONCLUSION: Balloon kyphoplasty can significantly ease pain caused by osteoporotic spinal fractures and tumor metastatic spinal fractures and can partially restore vertebral body height and kyphosis deformity, there is conducive to improving spinal function and improving the quality of life.

Construction and immunogenicity of recombinant adenoviruses expressing Cap protein of PCV2 and GP5 protein of PRRSV in mice / 生物工程学报

Porcine circovirus 2 (PCV2) has been implicated as the etiological agent of postweaning multisystemic wasting syndrome (PMWS). Co-infection of PCV2 and porcine reproductive and respiratory syndrome virus (PRRSV) can result in severe economic losses to the swine industry. In this study, we constructed the recombinant adenovirus rAd-Cap-GP5 expressing Cap of PCV2 and GP5 of PRRSV. And the expression of Cap and GP5 protein in the HEK-293 cells inoculated with rAd-Cap-GP5 were confirmed by immunoperoxidase monolayer assay (IPMA), indirect immunofluorescence assay (IFA) and Western blotting, respectively. The immunogenicity of recombinant adenoviruses rAd-Cap-GP5 was examined in mice by vaccination with the recombinant adenovirus. The results showed that the mice could produce anti-PCV2 and PRRSV antibodies detected by indirect ELISA and virus neutralization assay. It indicated that rAd-Cap-GP5 could provide humoral immunity responses in mice. The recombinant adenovirus rAd-Cap-GP5 might be an attractive candidate vaccine for preventing the disease associated with PCV2 and PRRSV infection.

Retrospective analysis of preoperative localization of insulinomas on CT / 中南大学学报(医学版)

OBJECTIVE@#To compare the value of CT using different equipment and scanning methods in preoperative localization of insulinoma and to investigate the possible causes that might influence the detection ratio on CT.@*METHODS@#A total of 47 patients with insulinomas confirmed by operation and pathologic examination from 1990 were collected, and the related clinical information and imaging data of CT were retrospectively analyzed.@*RESULTS@#The diagnostic accuracy for conventional CT with conventional enhancement scanning, spiral CT with pancreatic phase scanning, and multislice spiral CT with dual phasic enhancement scanning were 35.3%, 57.1%, and 81.3%, respectively, and the overall diagnostic accuracy of CT was 57.4%. The diagnostic accuracy of multislice spiral CT was greater than that of conventional CT (P or =1.5 cm was significantly higher than that of <1.5 cm (76.2%vs. 42.3%). Typical appearance of the lesions on CT was isoattenuation on plain scanning, and enhanced considerably after contrast enhancement.@*CONCLUSION@#The size of lesion is the major factor that influences the detection of insulinoma on CT. Multislice spiral CT with dual phasic enhancement scanning has a relatively high detection rate and is recommended for preoperative localization of insulinoma.

Degos' disease:A case report and review of literature / 北京大学学报(医学版)

A 18-year-old male patient's case was diagnosed as Degos'disease with pathognomonic skin lesions,accompanied by small bowel perforation,and reported here. Skin histopothological test show that the typical wedge-shaped necrobiosis and lymphocyte inflammatory infiltration. Vessels showed narrowing and thrombosis,with lymphocyte infiltration. Degos'disease is a systemic necrotizing vasculitis. Skin biopsy can confirm its diagnosis. Severe systemic complication should be prevented. Degos'disease should be considered in the differential diagnosis of skin lesions associated with systemic involvement.

The diagnosis and treatment of hilar bile duct carcinoma: a report of 36 cases / 中国普通外科杂志

Objective To evaluate the diagnostic and therapeutic methods for hilar bile duct carcinoma. Methods The clinical data of 36 patients with hilar bile duct carcinoma from Jan 1998 to Jul 2003 were retrospectively analyzed. Results The misdiagnosis rate(39%) was high. All patients underwent a surgery. The median survival time of 16 patients treated by radical resection was 30 months. The 1,3,5-year survival rate was 93%,50% and 25% respectively. While the median survival time of the rest 20 patients treated by a variety of non-radical operation was 16 months with 1,3,5-year survival rate of 47%,8% and 0 respectively(t=2.585).Conclusions Early diagnosis and radical resection improves long-term survival of patients with hilar bile duct carcinoma.

Surgical treatment of acute biliary pancreatitis / 中国普通外科杂志

Objective To investigate the timing of operation and the selection of surgical procedure for acute biliary pancreatitis.Methods The clinical data of 247 cases of acute biliary pancreatitis were retrospectively analysed.Results Among 10 non-operation patients,4 died;12 patients underwent emergency operation,5 had postoperative complications and 2 patients died after operation.169 patients underwent delayed operation after effective conservative therapy and 1 patient had postoperative complication;56 patients underwent(selective) operation without any postoperative complication or death.Conclusions Early emergency operation should be performed for relief of biliary obstruction in acute biliary obstructive pancreatitis.The patients with acute non-obstructive biliary pancreatitis should undergo conservative therapy at first and then,after(pancreatitis) has been controlled,delayed operation or selective operation to treat the biliary pathologic condition should be performed.

An experimental novel microcapsular system for in vitro culture of primary generation hepatocytes / 中国普通外科杂志

Objective To investigate a new microcapsular system for culture of primary generation hepatocytes in vitro. Methods A novel microcapsular system was used for in vitro culture of primary generation rat hepatocytes .The various characteristics of the microcapsular system were examined. The survival rate of hepatocytes and the functions of urea and albumin synthesis were observed.Results The microcapsule had good permeability,a certain degree of mechanical stability and favorable immunological protective ability. Hepatocytes within the microcapsule maintained a high degree of viability and function, and the synthesis of urea and albumin was 1~3 times higher than that of controls.Conclusions This microcapsule has excellent biological and mechanical properties.This system can be of great benefit for use in bioartificial liver and cell transplantation.

Treatment of spontenous rupture of hepatocellular carcinoma(a report of 64 cases) / 中国普通外科杂志

Objective To study the treatment of sponteneous rupture of hepatocellular carcinoma(SRHCC).Methods The clinical data of 64 patients with SRHCC treated by non-operation or operation were analysed retrospectively.Results The mean survival time of 14 patients treated by conservative therapy was 7 days(12 hours～12 days), the mean surival time of 31 patients treated by packing and 6 patients treated by ligation of hepatic artery was 11 days(4 hours-3 months)and 2.5 months(8 days-6 months);and the 1-month survival rate was 3.2% and 66.7% respectively.1 patient underwent transhepatic artery embolism surviving 9 days.The 1-year survival rate of 12 patients treated by hepatectomy was 66.7%;the mean survival time was 36 months(4 days-25 years and 3 months).Of the 12 patients,11 survived for over one and a half months whose liver function was Child-Pugh grade A before operation; 1 died of liver function failure 4 days after operation,whose liver function was Child-Pugh grade B before operation.Conclusions Emergent hepatectomy should be reserved for patients with an easily resectable lesion whose liver function is in Child-Pugh grade A.Early two-stage or delayed hepatectomy would be suitable for those patients who are unsuitable for emergent operation.Conservative therapy and other therapies may be used for patients with terminal stage of SRHCC.