Selective killing effect of Newcastle disease virus (NDV) on tumor cell makes it a potential anti-cancer agent that is widely studied.In recent years,NDV has become a research hotspot in anti-tumor medicine,while the ability to specifically kill tumor cells is the basis of antitumor drug.The tumor-specific killing characteristics and related mechanisms of NDV are reviewed.

0.05).The proportion of TR degree improved in patients of two groups in a short-term.However,the difference of TR in long-term between two groups was statistically significant(P

OBJECTIVE: In order to make a more rational clinical use of methotrexate and reduce adverse reactions, we summarize the factors that might cause excretion delay of high-dose methotrexate. METHODS: After consulting relevant domestic and overseas documents published recently, we summed up some factors that might cause excretion delay of high-dose methotrexate. RESULTS AND CONCLUSION: Physiological states of patients, drug interactions, drug-metabolizing enzymes, and many other factors all may lead to excretion delay of methotrexate. Therefore, we should pay attention to these factors to reduce the incidence of excretion delay and ensure safe medication in clinical application of methotrexate.

Objective To explore the effect of biliary stenting combined with ademetionine on malignant obstructive jaundice.Methods According to the digital table,60 patients of malignant obstructive jaundice were randomly divided into the control group and the observation group.The patients in the control group were treated with biliary stenting individually,and the observation group received biliary stenting and combined treatment with ademeotionine.The variety of liver function and C-reactive protein were observed.Results The liver function and index of Creactive protein of patients in the observation group were significantly superior to those in the control group (all P ＜0.01).Conclusion The treatment of malignant obstructive jaundice by biliary stenting combined with ademetionine is effective.The mechanism may be related to the effect of ademetionine on promoting cytothesis,glutathione synthesis and eliminating free-radicals.

OBJECTIVE:To determine the concentration of clindamycin in woman milk by RP-HPLC.METHODS:The concentration of clindamycin(with tinidazole served as internal standard) was determined by liquid-liquid extraction-HPLC.The chromatographic column was Luna C18 and the mobile phase consisted of acetonitrile-tetrahydrofuran-phosphate buffer (pH 5)(30∶1∶70) at a flow rate of 0.8 mL?min-1.The temperature of the column was kept at 40 ℃ and the detection wavelength was set at 205 nm.RESULTS:The linear range of clindamycin was 0.529～10.580 ?g?mL-1(r=0.996 7) with a lowest detectable limit of 0.2 ?g?mL-1.The average methodological recovery rate of clindamycin was 98.84%;both the inter-day RSD and intra-day RSD of clindamycin(at low,medium and high concentrations) were all less than 5%.CONCLUSION:The method is simple,rapid,sensitive,accurate and reproducible,and it is applicable for the determination of clindamycin concentration in woman milk.

Objective To study the outcome of ureterocele trated by open surgery and by endoscopic manipulation. Methods We reviewed 29 cases of ureteroceles, including 16 intravesical ureteroceles and 13 extravesical ureteroceles. 19 cases were treated by open surgery and 10 by endoscopic procedure. Results 11 cases of intravesical ureteroceles and 8 cases of extravesical ureteroceles under went open surgery, The reoperation rate was 18.1% and 12.5%, respectively. 5 cases of intravesical ureteroceles and 5 cases of extravesical ureteroceles underwent endoscopic treatment,the reoperation rate being 40.0% and 80.0% respectively. Conclusions Endoscopic approach might be the primary management for intravesical ureteroceles, but open surgery is a favorable alternative for extravesical ureteroceles.

Objective To understand the house-dust mite fauna in the school dormitory in Guangzhou city.Methods With the direct smear method and saturation solution of NaCl floatation method,a total of 970 bed-dust samples collected from the five school dormitory buildings were examined,from Oct.to Dec.in 2006.The house-dust mite in the samples were counted and classified.Results The prevalence rate of mite was 98.76%.About 72% of the samples,the number of mites was 500 and 3 000/g dust.Mean number of the mites in bed-dust samples showed a significant difference between the male and female student dormitory,and among five dormitory buildings.The mean number of mites usually decreased as the floor increased.Dermatophagoides pteronyssinus,Dermatophagoides farinae,gamasid mites,scab mites and pyemotidae etc were found in the samples.Conclusion House-dust mites universally exist in bed-dust of the school dormitory in Guangzhou city and the number is larger.Dermatophagoides pteronyssinus,Dermatophagoides farinae are the dominant kinds among the mites.

Objective To investigate the in-hospital death-related factors for acute encephalocele in patients with craniocerebral injury for craniotomy in order to provide evidence for clinical treatment and prognosis determina-tion.Methods The clinical data of 105 patients with craniocerebral injury occurring acute encephalocele during cra-niotomy were analyzed retrospectively.The correlations of the factors including sex,age,preoperative Glasgow coma scale(GCS)scores,preoperative intracranial pressure(ICP),postoperative pupil status,causes of encephalocel,post-operative GCS scores,postoperative ICP,coagulation mechanism,brain swelling,preoperative hypoxia,preoperative blood pressure and blood glucose were analyzed.Results The prognosis was assessed according to the Glasgow out-come scale(GOS)scores after procedure.There were 77 patients in death group(namely death cases)and 28 patients in survival group.Logistic regression analysis showed that postoperative GCS scores (Wald =14.127,Exp(B)=0.044,95%CI:0.032,0.448),causes of encephalocel(Wald =7.748,Exp(B)=8.183,95%CI:1.825,10.251), postoperative ICP(Wald =7.637,Exp(B)=7.637,95% CI:1.969,8.028),postoperative pupil status(Wald =4.001,Exp(B)=2.499,95%CI:1.019,5.122)and blood glucose(Wald =7.915,Exp(B)=8.891,95% CI:1.790,9.337)were closely associated with the in-hospital death in patients with acute encephalocele in craniocere-bral injury operation(P <0.05).Conclusion The postoperative GCS scores,causes of encephalocel,postoperative ICP,postoperative pupil status and blood glucose could be used as the important indexes for predicting in-hospital death of acute encephalocele in craniocerebral injury for craniotomy.To prevent the intraoperative encephalocele and reduce the intracranial pressure are the important measures to reduce the mortality rate of the patients with acute encephalocele.

Objective To investigate the variation in the position of conus medullaris in Chinese adult population in order to avoid hitting conus during spinal puncture. Methods Eight hundred patients suffering from back pain, aged 18-91 yr, were enrolled in this study. The position of conus medullaris was determined using Siemens 1.5 T magnetic resonance imaging system. According to the method described by Reimann, the vertebral body was used as mark of reference to the level of the end of conus. Results There were 190 patients in whom the position of the end of conus medullaris was lower than L1,2 . The incidence of the position of the end of conus medullaris lower than L1,2 was higher in patients 30-60 or older than in those under 30, and in those over the age of 60 than in those 30-60 (P ＜ 0.05). Conclusion Spinal puncture should be performed cautiously at L2,3. CT or MRI is recommended before operation for the patients to locate the position of conus medullaris and avoid injury to the spinal cord.

Objective To compare the effect of postoperative intercostal nerves cryoanalgesia and patient controlled epidural analgesia (PCEA) in patients undergoing thoracic surgery. Methods From April 2006 to May 2008,89 patients undergoing thoracic surgery were randomly divided into intercostal nerves cryoanalgesia group (group A,47 cases) and PCEA group (group B,42 cases). The scores of pain, use of pain medication and time of out-of-bed activity after the operation were used to evaluate the effect of pain between two groups. Results The scores of pain in group A and group B were (1.49 ± 0.80) and (2.43 ± 1.21) scores respectively. There were significant differences in the scores of pain. The use of pain medication [(1.28 ± 0.62) times vs (2.02 ± 1.05) times]and time of out-of-bed activity after the operation [(43.15 ± 12.22) h vs (64.10 ± 14.25) hi were significant difference between the two groups(P< 0.05). Conclusions For reducing the post- thoracotomy pain,intercostal nerves cryoanalgesia is superior to PCEA. Intercostal nerves cryoanalgesia can provide satisfactory analgesia after thoracic surgery.