It is important to establish a simple method of culture in vitro to obtain purity oligodendrocyte. This paper introduced the re-searches about co-culture in vitro with rat cortical gliocyte, proliferation and differentiation of oligodendrocyte progenitor, differentiation of oligodendrocyte and identification of cell surface antigens at different stages of development.

Objective To study the X-ray and CT features of costal eosinophilic granuloma for a better understanding.Methods Eight patients with costal eosinophilic granuloma proved by surgery or biopsy were analyzed retrospectively.All patients had X-ray plain film, 6 patients had CT examination,including a case of enhanced CT scan.Results All 8 lesions were solitary.Six lesions were in the anterior rib and 2 in the posterior rib.On X-ray, all case showed single cavity and oval lesion with clear boundary.On CT images, 5 lesions demonstrated expansile destruction of bone with cortical bone thinning, and 3 were osteolystic destruction with soft tissue mass around.On the patient with enhanced CT scan, the lesions showed a moderate and uniform enhancement.Conclusion The X-ray and CT findings of costal eosinophilic granuloma are characteristic.

Objective To explore the technique and feasibility of using 1.5 T MR guided radiofrequency ablation (RFA) of hepatic malignant tumor. Methods Twenty three patients with 44 malignant lesions in liver confirmed by pathology were treated with 1.5 T MR guided RFA using MR compatible multipolar RF electrode. Only patients refusing open surgery or suffering from unresectable lesions were included. Of these, 11 patients had primary hepatic carcinoma and 12 patients had hepatic metastases. The mean maximal diameter of lesions was (3.3 ± 1.8)cm. Postoperative MR was performed; the ablation zone covered and exceeded 0.5 to 1.0 cm to the margin of initial tumor was considered successful. Results All ablations were successful and lesions created by radio frequency were large enough to cover the initial tumor volume in all cases. No severe complications such as biliary fistula, perforation of diaphragmatic muscle,postoperative jaundice and pneumothorax were encountered. The mean operative time was (93 ± 33 ) min.The RF electrodes appeared in MRI as low signal structure. The ablation lesions were well-defined hyperintensity in T1 WI and hypo-intensity with a thin rim of high signal intensity on T2WI and DWI. Conclusion 1.5 T MR guided RFA of hepatic malignant tumor is an effective and safe technique.

Objective To explore the image quality of coronary artery imaging with dual source computed tomography (DSCT) and analyze the coronary artery lesions. Methods Two hundred cases with clinically suspected coronary heart disease, who underwent plain and enhanced DSCT coronary artery imaging without oral Betaloc preparation were retrospectively analyzed. The patients were divided into two groups: the senile group of 126 cases with the average age of (71.3±7.7) years old and the control group of 74 cases with the average age of (50.4±6.2) years old. The clinical characteristics, the average heart rate and breath-holding time for plain and enhanced scan, the average calcium score, the image quality evaluation and the coronary stenosis were compared between the two groups. Results Compared with the control group, the incidences of chest pain or discomfort, hypertension, diabetes mellitus, hypercholesterolemia and old myocardial infarction were significantly higher in the senile group. The average calcium score and the numbers of <50% and ≥50% stenosis were also significantly higher in the senile group than those in the control group (364.9±442.6)points vs. (44.8±106.9)points, 159 vs. 45 branches, 212 vs. 32 branches, respectively, all P<0.01). The average heart rate and breath-holding time of plain and enhanced scan had no significant differences compared with the control group. The proportion of the coronary segments with grade 1 ,grade 2 and grade 3 image quality also had no significant difference compared with the control group (96.5%,2.3% and 1.2% vs. 97.1%, 2.0% and 0.9%, P>0.05). Conclusions DSCT coronary artery imaging in senile patients is noninvasive, safe and simple, and excellent coronary artery image can be obtained without oral Betaloc preparation. It can be used as a routine examination in the clinical diagnosis of coronary heart disease.

OBJECTIVE:To establish a method for simultaneous determination of 5 effective components in Luohua zizhu dry extract. METHODS:UPLC-MS/MS was conducted. The separation was performed on an Zorbax Eclipse Plus C18 column with mo-bile phase of acetonitrile-water(gradient elution)at the flow rate of 0.3 mL/min. The column temperature was set at 40℃and sam-ple size was 2 μL. The analytes were detected in the multiple reaction monitoring(MRM)mode. Nitrogen was used as drying gas and atomized gas. The temperature and flow rate of drying gas were 325 ℃ and 6 L/min. The pressure of atomized gas was 45 psi. The temperature and flow rate of sheath gas were 350℃and 12 L/min. The voltage of capillary were 4000 V(+)and 3500 V(-). The voltage of nozzle was 500 V. RESULTS:The linear ranges of luteoloside,acteoside,quercetin,luteolin and rutin were 0.5048-252.4 ng/mL(r=0.9999),0.7124-356.2 ng/mL(r=0.9990),0.5094-254.7 ng/mL(r=0.9962),0.3030-151.5 ng/mL(r=0.9998) and 0.6022-301.1 ng/mL(r=0.9996),respectively. RSDs of precision,stability and reproducibility tests were all less than 3.0%. The limit of quantitation were 0.42,0.87,0.33,0.12,0.76 ng/mL. The recoveries were 97.99%-101.20%(RSD=1.3%,n=6), 96.50%-101.20%(RSD=1.7%,n=6), 94.81%-99.34%(RSD=1.7%,n=6), 97.54%-100.51%(RSD=1.2%,n=6), 93.37%-98.70%(RSD=1.9%,n=6),respectively. CONCLUSIONS:The method is simple,precise,stable and reproducible, and can be used for simultaneous determination of 5 effective components in Luohua zizhu dry extract.

Objective To cvaluate the efficacy and safety of HabibTM VesOpen intravascular radiofrequency catheter percutaneous radiofrequency ablation combined with TACE in the treatment of portal vein tumor thrombus of primary hepatocellular carcinoma.Methods Thirty-nine patients with primary hepatocellular carcinoma complicated with portal vein thrombosis were treated with HabibTM VesOpen intracavitary catheter ablation combined with TACE.The postoperative success rate,complication,blood index,α-fetoprotein (AFP),portal vein patency and tumor thrombus imaging changes were assessed.Results All of 39 patients underwent surgery successfully without occurrence of perforation,infection,hepatapostema,intra-abdominal hemorrhage nor other complications associated with surgery.Blood routine examinations (WBC,RBC,PLT) after 2 weeks and 4 weeks of surgery had no statistical difference compared with those of preoperation.Liver function indexes including ALT,AST,ALB had statistical difference before and after the surgery except for TBIL.AFP had statistical difference before and after surgery.Doppler ultrasonography after 4 weeks showed blood flow in original blocked portal vein.Enhanced CT or MR examinations after 8 weeks on the abdomen,suggested that tumors were shrinked or disappeared.Conclusion Radiofrequency catheter ablation with intracavitary radiofrequency catheter of HabibTM VesOpen is an effective method in the treatment of portal vein tumor thrombus in primary hepatocellular carcinoma.

Objective To develop a method for simultaneous determination of three hydrophilic components and two lipophilic components in Radix et Rhizoma Salviae Miltiorrhizae. Methods The RP-HPLC method was performed by using a Welchrom C18 column(250 mm×4.6 mm,5 μm)with a mobile phase of acetonitrile (A)-0.1%phosphoric acid(B). The gradient elution program was as follows:0-15 min,10%→12%A;-35 min,12%→20%A;-45 min,20%→60%A;-65 min,60%→65%A;-80 min,65%→80%A;-90 min,10%A. The flow rate was kept at 1.0 mL?min-1 . The detection wavelength was set at 280 nm. The column temperature was 30 ℃ . Results A good linearity was obtained over 0.059 5-2.380 0 μg for tanshinol, 0.346 0-13. 840 0 μg for rosmarinic acid, 0. 656 0 - 26. 240 0 μg for salviamolic acid B, 0. 420 0 - 16.800 0 μg for cryptotanshinone and 0.414 0- 16.560 0 μg for tanshinoneIIA, respectively ( r = 0.999 9). The average recovery rates were between 98.69%-100.91% with RSD less than 1.2%(n = 6). Conclusion The method is rapid, accurate, credible and repeatable, and can provide basis for the quality control of Radix et Rhizoma Salviae Miltiorrhiza.

Objective To discuss the injective method, contrast agent concentration and delay time of MSCT direct venography in lower extremity vein, in order to make optimal venographic schedule. Methods Thirty-two patients with lower extremity vein diseases underwent MSCT direct venography in using different concentration and injective rate of contrast agent, and the images were analyzed. The displaying ability of MSCT direct venography in lower extremity vein segment was compared with that of X-ray venography in 22 patients. Results Blood flow correlation constructed defect was the main factor impacting image quality of CT venography in lower extremity. The image scores between the groups of injective rate 1.5 ml/s and the group of 2.5 ml/s were statistically different (χ~2=5.495, P=0.019), whereas no difference of image score was found between the group of concentration of 25% and 15% (χ~2=3.333, P=0.068). The displaying ability of CT and X-ray venography in anterior tibial vein, posterior tibial vein, popliteal vein and femoral vein was not statistically different (χ~2=2.095, P=0.148). For iliac vein, the displaying ability of CT outstripped that of X-ray venography (χ~2=8.324, P=0.004). Conclusion With the schedule of delay time 50 s, injective rate 2.5 ml/s and concentration 45 mgI/ml (nonionic 300 mgI/ml and diluted 15%), MSCT direct venography in lower extremity can acquire satisfactory image, and its displaying ability of iliac vein is better than that of X-ray venography.

Lipase from Burkholderia cepacia complex is one of the most versatile biocatalyst and is used widely in many biotechnological application fields including detergent additives, the resolution of racemic compounds, etc. Based on the known whole genomic information of B. cepacia, both ampicillin and kanamycin were added to the TB-T media, the traditional selective media, to screen B. cepacia complex strains from rhizosphere soil samples. The single colonies on the plates with the modified TB-T media were then qualitatively determined the ability to produced the extracellular lipase in the rhodamine B-olive oil agar plates. Thirty-five strains of lipolytic pseudo-B. cepacia complex were isolated and the positive rate of lipolytic bacteria was 65%. Among them, 15 pseudo-B. cepacia complex strains with the tolerance to benzene, n-hexane and n-heptane at the concentration of 10% (V/V) were selected and identified by the recA gene sequence. All of the 15 lipolytic bacteria belonged to the B. cepacia complex.

The purpose of this study was to examine the prevalence of disordered eating patterns (DEP) and menstrual irregularities in Chinese female athletes (n=881) and nonathletic controls (n=147), by using Eating Attitudes Test-26 (EAT-26) and written questionnaires. The athletes were divided into the following 6 categories : technical, endurance I (leanness is considered important for athletic performance) and II (leanness is less important), aesthetic, ball-game and power sports. The prevalence of DEP in the athletes estimated by EAT-26 was low (technical 1.5%, endurance I 3.3%, endurance 11 1.6%, aesthetic 3.0%, ball-game 3.0% and power sports 0.9%), and didn't significantly differ from that in nonathletic controls (0.7%) . Amenorrheic athletes were not observed in endurance I and II, aesthetic, or ball-game sports and very low prevalence rates for amenorrhea were found in the athletes in technical (0.5%) and power sports (0.4%) . These figures represent no significant differences between athletes and nonathletes in the prevalence rates of amenorrhea. It was suggested that a low prevalence of DEP in Chinese athletes stems from low socioculturally- and socioeconomically-imposed desires to be thin and low requirements for weight loss to improve athletic performance. Also, the present data suggest that the low incidence of amenorrhea in Chinese athletes is partly associated with the low prevalence of DEP.