Background and purpose: Colorectal cancer (CRC) is the most frequently occurring primary malignant tumor. Chemotherapy can reduce the risk of local and distant relapse. Therefore, it is very important to ifnd new biomarkers that can predict chemoresistant and help in treatment decisions. Methods:In this study, we examined the expression levels of 1 200 human miRNAs in 6 CRC tissues, using miRNA proifling assay arrays. A validation study was done to corroborate a subset of the results, including expression levels of miR-4299, miR-196b, miR-324-5p, miR-455-3p and miR-939, by analyzing 100 specimens of stageⅣcolorectal adenocarcinoma (not respond and respond to the chemotherapy) to quantitative real-time PCR. We modeled the relationship between the expression levels of these miRNAs and the survival rate of 100 CRC patients by Kaplan-Meier method. Results:Expression proifles in CRCs suggested that 5 miRNAs were candidate markers associated with the chemoresistance of colorectal cancer. We found that miR-4299 and-196b had signiifcant diagnostic value for chemoresistance CRC. miR-4299 yielded an AUC (the areas under the ROC curve) of 0.784 and miR-196b yielded an AUC of 0.647 in discriminating CRC from controls. Combined ROC analysis using these 2 miRNAs revealed an elevated AUC of 0.848 with 67.9%sensitivity and 90.9%speciifcity in discriminating chemoresistance CRC. The low level of miR-4299 expression and the high level of-196b expression are signiifcantly correlated with the good survival of CRC patients. Conclusion:These data suggest that miR-4299 and-196b have strong potential as novel biomarkers for chemoresistant detection of colorectal cancer.

Objective: To evaluate the sleeping status of Chinese Peace-Keeping Force in Liberia,and to ensure soldiers' somatic and mental health. Methods: Written questionnaires about the sleeping status were collected twice from Chinese military staff at two independent intervals. Results:The sleeping status of the soldiers was worse in Liberia than at home,but it became better at later stage when soldiers adapted to the environment and the job,when the weather became less hot,and appropriate medical treatment was used. Conclusion: Improving occupancy condition,adjusting night duty to ensure adequate sleeping time for the night duty soldiers,strengthening the sleeping hygiene education and proper medical treatment were important for the severe insomnia soldiers.

Objective To detect the inhibitory effect of HSP27-siRNA on hepatocellular carcinoma(HCC) cells.Methods HCC cell QGY lines were cultured with HSP27-siRNA in a differtent range of concentration for various time periods.Cell activity was studied by MTT.The changes of cell cycle and apoptosis were analyzed by FCM.RT-PCR was used to detect the effect of HSP27-siRNA on QGY cell expression of HSP27 mRNA.Western blot was used to detect the inhibition efficiency of HSP27-siRNA on HSP27protein.Results The proliferation of QGY cell was inhibited by HSP27-siRNA,and HSP27-siRNA decreased the expression of HSP27 protein.HSP27-siRNA inhibited the proliferation of QGY cell line and induced apoptosis in vitro,and its effect was both dose-and time-dependent.Conclusions HSP27-siRNA can inhibit proliferation and induce apoptosis of HCC cancer cell lines.Thus,it may become a method for effective treatment of HCC cancer.

OBJECTIVE:To establish a method for the content determination of glabridin in Clycyrrhizae Radix et Rhizoma from different regions. METHODS:HPLC was performed on the column of Inertsil ODS-SP with mobile phase of acetoni-trile-0.05%phosphoric acid(gradient elution)at a flow rate of 0.8 ml/min,detection wavelength was 280 nm,the column tempera-ture was 35 ℃,and the injection volume was 20 μl. RESULTS:The linear range of glabridin was 0.906-18.12 μg/ml(r=0.999 7), RSDs of precision,stability and reproducibility tests were lower than 3%;recovery was 98.73%-101.90%(RSD=1.25%,n=6). There were obvious differences among the glabridin contents in G. uralensis from different regions. CONCLUSIONS:The method is simple and accurate with high precision,and can be used for the content determination of glabridin in Clycyrrhizae Radix et Rhi-zoma.

Objective To evaluate guglidnai detachable ceil(GDC)embolization therapy in treatment of acnte stage ruptured aneurysms.Methods 86 patients were involved in our study,we treat aneurysms with different intravascular therapy techniques,anti-artery-spasm treatment and lumber centesis were performed after therapy.Resuits 72 patients received 100% embolization,10 patients received 95% embolization,4 patients received 90% embolization,no patient died due to therapy in follow-up,further function recover was found.Conclusion Acute stage intravascular therapy combined with comprehensive measures can effectively improve the outcome of patients with ruptured aneurysms.

Objective To summarize the surgery effect of removal of tuberculum sellae meningiomas by anterior interhemispheric approach.Methods The data of 18 cases of removal of tuberculum sellae meningiomas by anterior interhemispheric approach were analyzed retrospectively.Results Simpson grade Ⅰ resection was achieved in 5 cases;grade Ⅱ in 10 cases and grade Ⅲ in 3 cases.15 patients were followed up for 6 months to 7 years,3.1 years on average.6 patients recovered normal ability in work and life,6 patients' symptom was improved after sugery,3 patients' postoperative visual acuity remained unchanged,2 patients got the result of medium disability and 1 patient died.Conclusion Large tuberculum sellae meningiomas that grows anteriorly and superiorly can be well exposed through anterior interhemispheric approach,the amount of page pull is reduced,so the satisfactory sugical effect can be achieved.

Objective To compare the influence for intravenous dexmedetomidine and midazolam during combined spinal and epidural anesthesia (CSEA) on sedation,respiratory and circulatory.Methods Ninety patients with lower extremity fractures and internal fixation,were divided into dexmedetomidine group,midazolam group and control group by random digits table with 30 cases each.CSEA was performed at L3-4 interspace.After block reached T8 level,dexmedetomidine,midazolam and 0.9％ sodium chloride were given to the three groups.Ramsay score,mean arterial pressure (MAP),heart rate (HR),partial pressure of carbon dioxide in end expiratory gas (PErCO2),respiratory rate (RR) were recorded before anesthesia(T0),after CSEA (T1),and 10,15,30,45,60 min after giving drug (T2-T6),and intraoperative awareness was recorded.Results Ramsay score in dexmedetomidine group and midazolam group at T2-T6 were higher than those in the group T0,T1 and concurrent control group (P ＜ 0.05),MAP were lower than those in the group T0,T1 and concurrent control group (P ＜ 0.05).HR in dexmedetomidine group at T2-T6 were lower than those in concurrent midazolam group and control group (P ＜ 0.05).PETCO2 in midazolam group at T2-T6 were higher than those in concurrent dexmedetomidine group and control group (P ＜ 0.05),RR were lower than those in concurrent dexmedetomidine group and control group (P ＜ 0.05).The rate of intraoperative awareness in dexmedetomidine group and midazolam group was lower than that in control group [16.7％(5/30) and 13.3％(4/30) vs.93.3％(28/30),P＜0.05].Conclusions Dexmedetomidine and midazolam provide good sedation to reduce intraoperative awareness,slight inhibition of blood pressure.Dexmedetomidine can decrease HR,but it does not influence respiratory function.Midazolam restrains respiratory function.

BACKGROUND:Treatment prescription for intervertebral space infection is controversial. Conventionally,lying in bed,physical therapy,symptomatic therapy,and a large dosage of antibiotics were used frequently;however,the application of antibiotics was still controversial. OBJECTIVE:To explore the implantation of calcium sulfate powder combined with antibiotics for the treatment of suppurative spondyfitis of the thoracic vertebra. DESIGN,TIME AND SETTING:A retrospective case analysis was performed at Department of Orthopaedics,Affiliated Hospital of Guangdong Medical College from October 2000 to August 2008. PARTICIPANTS:A total of 24 patients with suppurative spondyfitis of the thoracic vertebra,including 9 males and 15 females and aging 42-71 years,were provided by Department of Orthopaedics,Affiliated Hospital of Guangdong Medical College. Suppurative spondyfitis of thoracic vertebra occurred on T6/7(n=9) ,T7/8(n=6) ,T8/9(n=3) ,T10/11(n=4) ,and T6/8(n=2) . Among all patients,8 cases had severe pain,myospasm of dorsal muscles,passive position,difficulty of turning over,and lateral or bilateral melosalgia;11 had anorexia and athrepsy;2 had paresis of both lower extremities and difficulty of automatic micturition;3 had diabetes mellitus. METHODS:After the 24 patients with suppurative spondyfitis of the thoracic vertebra received the cleaning operation on focus infection through latero-anterior thoracic cavity,the defect area of bone was inserted with titanium case filled with the calcium sulfate cement combined with antibiotics,and then the internal fixation and a plenty of antibiotics were applied after the operation. MAIN OUTCOME MEASURES:Recovery rate was evaluated using JOA assay,and blood sedimentation and bone healing were observed. RESULTS:All the 24 patients received the follow-up with the mean duration of 5.8 years. One case did not recovered,but other 23 patients recovered obviously. The recovery rate was 30%-100%. Blood sedimentation decreased from(86.74?10.56) mm/h before operation to(26.40?5.42) mm/h at 5 months after operation. Bone fusion occurred on all 24 patients,and the time lasted for 3-8 months. Relative death,complications,and infection-induced relapse were not found during the following up. CONCLUSION:To insert the titanium case filled with the calcium sulfate cement combined with antibiotics into the defect area of bone created by the cleaning operation on focus infection and combine with the application of the internal fixation by one stick and two screw and the brace for back and lumbar is an effective therapy for treatment of suppurative spondyfitis of the thoracic vertebra.

Objective To explore the clinical significance of treating severe patients with frontal lobe and temple lobe with enlarging pterion approach operation. Methods All the severe patients with frontal lobe and temple lobe injury were divided into two groups at random. One group adopted the standard large trauma craniotomy, the other group adopted enlarging pterion approach operation. Under the same conditions, score of GCS, patients ages in two groups were analyzed. And we compare their operation results. Results Compared the standard large trauma cranioto-my,the good recover rates rise 9.2% (P < 0.05) and the death rate reduce 10.2% (P < 0.05) by using the enlarging pterion approach operation. Conclusion The enlarging pterion approach operation could improve existing quality and decrease mortality and disabled rate in patients with severe brain injury in frontal lobe and temple lobe.

Objective To develop a micro-circumstance airtight cabin for in the study of biological aerosols detection with such functions as airflow control and temperature and humidity detection .Methods Wind speed sensors , temperature and humidity sensors , electrical control valves , high efficiency filters and the vacuum pump formed the micro-circumstance regulating system .The techniques of airflow direction control , temperature compensation , air pressure control and aerosol uniformity distribution were used .Numerical simulation of aerosol concentration distribution in the airtight cabin was achieved using Fluent software .The bioaerosol concentration in different locations was tested by experiments .Results The micro-circumstance airtight cabin consisted of an airtight cabin and a control cabin .The control cabin used a single-chip microprocessor to provide air supply and exhaust air to the airtight cabin in a seaparate exhaust mode and cyclic ventilation mode.It worked under a negative pressure condition .Through numerical simulation,the aerosols were distributed through-out the cabin after five minutes of generation and the bottom airflow arrived at the top .The distribution of aerosol concentra-tion was approximately uniform .Conclusion The micro-circumstance airtight cabin is suited to various bioaerosols testing research thanks to its negative pressure working without bioaerosol leakage .