Objective:To explore the changes in somatosensory evoked potential (SEP) in rats with spinal cord injury (SCI) and the effects of relieving spinal cord compression at different times on recovery and the evoked potential.Methods:Seventy Sprague-Dawley rats were randomly divided into a control group of 10 and an experimental group of 60. The experimental group was further divided into a mild injury group of 10, a moderate injury group of 40 and a severe injury group of 10. Spinal cord injuries with different severities were established in the experimental group using a self-made percussion device. The rats′ SEPs were measured before the injury, and 5 minutes, 1 hour, 6 hours, 3 days and 7 days afterward. Some of the rats receiving decompression treatment.Results:The more seriously the spinal cord was injured, the longer was the latency and the smaller was the amplitude. Both differences were statistically significant. Rats with longer compression time had significantly longer incubation periods and greater decreases in the amplitude. After relieving the compression, rats from whom it had been relieved earlier had quicker amplitude recovery. For rats under compression for 30 minutes, their amplitude was the lowest seven days later.Conclusions:For spinal cord injury, longer compression time can lead to more significant changes in the latency and amplitude of SEP, with the change in the amplitude more significant than that in the latency.

Objective To study the influence of edaravone on malondialdehyda(MDA)and expression of Hsp-70 and Bcl-2 in the perihematoma region in rats.Methods A total of 120 health male rats were randomly divided into false-operation group(n=20)、intracerebral hemorrhage(ICH)-therapy group(n=50)and ICH control group.Each group was further divided into 5 subgroups respectively according to 6 h、24 h、48 h、72 h and 5d after model creation.Cerebral hemorrhage model was duplicated with the method created by Fredrik.Brain water content and MDA were measured.Expression of Hsp-70 and Bcl-2 were assayed in each group with immunohistochemical method.Results Brain water content and MDA were lower in ICH-therapy group than those in control group(P

Objective To develop a new method for sterilization in agars culture mediums,i.e.Agars culture mediums is sealed to be sterilized and preserved after resolution.Methods The effect of rudimental Ethylene Epoxide was investigated,and the germiculture results by different preserving methods were analyzed.Air sedimentation bacterium was sampled by different methods to analyze the bacterium capture rate.Results Ethylene Epoxide sterilized agars culture mediums bacterium capture rate was similar with regular agars.Conclusion Ethylene Epoxide sterilized agars culture mediums can be used in sampling of clinical treatment and other outburst incident,reducing the preparation time.

Hypertension, which has variant of pathogenesis, is one of the most widely spread chronic diseases with serious complications. Antihypertensive drugs can reduce blood pressure and alleviate or reverse cardiovascular remodeling by affecting one or more processes of blood pressure adjusting system. This review focus on targets of antihypertensive drugs associated with Renin angiotensin system, Adrenergic system, Bradykinin Prostacyclin system, Endothelia factor relative system, iron channels and the progresses in the studies of gene therapy for hypertension.

SUMMARY Trauma is a global social problem, with the number of deaths up to 5.8 million all over the world annually.Currently, severe trauma has become the first cause of death in young adults in China. Nowadays, there are many problems in the trauma rescue system, including long pre-hospital transfer pe-riod , several secondary transfers, no information exchange between pre-hospital and in-hospital care, and the poor integrated treatment, which results in the situation that the overall treatment level of severe trau -ma in China is relatively low.In order to solve these problems, we carried out the research and promotion of severe trauma rescue standard, involving completing severe trauma information database , providing lo-cal rescue medical workers with standard training , and building up the information system for the linkage and warning of severe trauma.In addition, we developed and promoted the new standard system for se -vere trauma in 15cities with 124 medical centers.Due to our research, the treatment ability of severe trauma in the pilot areas was enhanced, and the mortality and morbidity of severe trauma were reduced significantly.To sum up, we had got the expected results after implementing the project .

Objective To employ Borrelia burgdorferi( B. burgdorferi) , a culturable and genetical-ly transformable spirochete, as a surrogate system to study Treponema pallidum ( T. pallidum) gene function. Methods Bioinformatic analysis revealed that the T. pallidum gene tp0111 encodes the putative sigma factor RpoN. We constructed a B. burgdorferi shuttle vector harboring tp0111. The shuttle vector was then trans-formed into the B. burgdorferi rpoN mutant strain. The phenotype of the resulting B. burgdorferi strain was then determined. Results We successfully constructed the B. burgdorferi rpoN mutant carrying the T. palli-dum gene tp0111. We found that tp0111 could partially complement the B. burgdorferi rpoN mutant. Con-clusion This work provides the first experimental evidence showing that tp0111 is the rpoN gene of T. palli-dum. It also demonstrates that B. burgdorferi can be used as a surrogate system for studying T. pallidum gene function.

Objective To investigate the potential therapeutic efficacy of lentivirus-mediated artemin (ARTN) gene modified bone marrow mesenchymal stem cells (MSCs) transplantation on the rat model of Parkinson' s disease (PD) and the effects on expression of brain-related proteins.Methods MSCs were isolated and cultured in vitro,transfected by recombinant lentiviral vectors carrying ARTN gene.The PD rat model established by 6-hydroxydopamine (6-OHDA) was randomly divided into 5 groups:Sham group,PD group,MSCs group,MSCs transfected with empty lentiviral vectors transplanted (LV-MSCs)group and MSCs transfected with recombinant lentiviral vectors carrying ARTN gene transplanted (LVARTN-MSCs) group.The MSCs,LV-MSCs and LV-ARTN-MSCs groups were transplanted into the left striatum of each rat model of PD and ethology tests in every group were made with intraperitoneal injection of apomorphine (APO) 2,4,6,8 weeks after transplantation.The expression of tyrosine hydroxylase (TH) protein in substantia nigra (SN) was measured by Western blotting and immunohistochemistry,and immunofluorescence showed ARTN gene modified MSCs expression in rat brain tissue.The levels of dopamine (DA),dihydroxy-phenylacetic acid and homovanillic acid in striatum of each group were detected by high performance liquid chromatography.Results After injection of APO,rotation frequency decreased in LV-ARTN-MSCs group,i.e.(179.33 ± 10.74) circles/30 min vs (235.83 ± 18.95),(203.67 ±11.50) and (206.33 ± 11.86) circles/30 min in PD,MSCs and LV-MSCs groups (q =8.828,P ＜ 0.01;q =3.802,P ＜ 0.05;q =4.219,P ＜ 0.05).The percentage of TH-positive cells in SN after cell transplantation was increased significantly in LV-ARTN-MSCs group (64.05％ ± 5.49％) when compared with PD group (34.18％ ±3.35％),MSCs group (52.59％ ±4.48％) and LV-MSCs group (50.57％ ± 4.41％),respectively (q =13.280,5.135,6.028,all P ＜0.01).At the same time,TH protein in SN after cell transplantation was also increased obviously in LV-ARTN-MSCs group.ARTN gene modified MSCs can survive for at least 6 weeks in the rat brain of PD,mainly concentrated in the transplantation side of striatum.Eight weeks later,the levels of DA in striatum after cell transplantation were elevated significantly in MSCs group (2.34 ± 0.54),LV-MSCs group (2.28 ± 0.45) and LV-ARTN-MSCs group (2.28 ± 0.45)when compared with PD group (0.87 ± 0.07) (q =5.233,P ＜ 0.05;q =5.020,P ＜ 0.01;q =20.190,P ＜ 0.01),and LV-ARTN-MSCs group showed the most significant improvement.Conclusion ARTN gene modified bone marrow MSCs transplanted into the striatum of brain may have therapeutic effects on rat models of PD.

Objective To study the role of endoscopic retrograde cholangiopancreatography (ERCP) in diagnosing and treating iatrogenic bile duct injury after laparoscopic cholecystectomy (LC).Methods A retrospective study was conducted on 45 patients with iatrogenic bile duct injury after LC who were investigated and treated by ERCP from December 2002 to August 2015.Results Using the StrasbergBismuth classification,there were 14 patients with type A and 4 with type C who were managed successfully using endoscopic nasobiliary drainage (ENBD) and interventional ultrasound abdominal localized puncture and drainage ; 7 patients with type D were managed successfully using endoscopic sphincterotomy (EST) and endoscopic retrograde biliary drainage (ERBD).For the 5 patients with type E Ⅰ and 3 patients with type E Ⅱ who were treated by EST and ERBD,one patient who had common bile duct transection required cholangioenteric Roux-en-Y anastomosis.For the 6 patients with type E Ⅲ and 6 patients with type EⅣ who were treated by EST and ERBD,a patient required a cholangioenteric Roux-en-Y anastomosis to achieve good results.Conclusions When iatrogenic bile duct injury is suspected after LC,correct assessment with ERCP should be taken immediately.ERCP when combined with ENBD and (or) ERBD could reduce bile duct pressure and dilate stenotic bile ducts to avoid further operation.

BACKGROUND:Static compressure effect between the fracture fragments was generated by fixation itself (tension band wire and screw), but dynamic compression effects were generated during flexion. Mechanical strength and stability of patel ar fracture fixation have obvious advantages. However, there are lacks of quantitative comparative studies on static and dynamic compression effects of these fixation methods.
OBJECTIVE:To observe strength changes and clinical significance of static and dynamic compression using four fixation techniques.
METHODS:Standardized transverse patel ar fracture models were created with fresh cow patel as. The patel as were randomly divided into four groups:fixation was accomplished with modified tension band wiring (wire group);modified tension band with braided cable (cable group);interfragmentary screws (screw group);cannulated screw tension band with wire (cannulated screw group). Before fracture fixation, Fuji pressure-sensitive film was laid among fracture fragments to measure the pressure among fracture fragments after fixation, i.e., static and dynamic compression. Model of each group was measured as fol ows:(1) after fixation, the fixation was removed, and the Fuji pressure-sensitive film was taken out;(2) after fixation, material testing machine was used. Samples underwent a three-point bending test with a 5 000 N load, simulating dynamic compression during knee flexion. Subsequently, Fuji pressure-sensitive film was taken out. Each Fuji pressure-sensitive film was tested using prescale FPD-8010E software. Thus, average pressure among broken bone ends was obtained, and statistical analysis was performed. Static and dynamic compression among broken bone ends was compared in each group.
RESULTS AND CONCLUSION:Average static compression was significantly lower in the wire group than in the cable group, screw group and cannulated screw group (P<0.05). Under 5 000 N load of dynamic compression, similar compression among broken bone ends was visible among wire group and cable group, screw group and cannulated screw group (P>0.05). Dynamic compression was higher than static compression in the wire group (P<0.05). Results verified that compared with modified tension band wire fixation technique, cable or screw could evidently increase static compression among broken bone ends, but simultaneously weaken dynamic compression among broken bone ends.

0.05).Early pathology phenotype of BLM groups was similar as those of pneumonia groups.But in day 14th and day 28th groups,the ratio of macrophagus positive area in lung interstitium was bigger than that of control group(P