The hypothesis of tumor stem cells believes that a small proportion of cells which have the stemness property reside in tumor. This population is the cause of tumor formation, growth, metastasis and relapse. Only the therapy targeting this population could make tumors curable. At present, most anti-cancer protocols only kill the majority of differentiated tumor cells and hardly affect the tumor stem cells. That is why most of the therapies do not achieve good results. Disrupting the pathways and niche which regulate the tumor stem cells’ self-renewal, or inducing the tumor stem cells’ differentiation, or targeting the surface markers which distinguish the tumor stem cells from normal stem cells are all probable strategies.

Background and purpose:Cervical cancer is one of the common disease in women in china.Radical surgery remains the first choice for patients with early-stage cervical cancer.However,the majority of patients with bulky disease have lymph nodes or metastases when diagnosed.Palatinum-based neoadjuvant chemotherapy has been utilized in locally advanced cervical cancer with the aim of improving response and survival.The study was to evaluate the effect of neoadjuvant chemotherapy followed by radical surgery for the patients with locally bulky Ⅰ_(B2) and Ⅱ_A cervical carcinoma.Methods:Between September 2003 and February 2004,51 untreated patients with Ⅰ_(B2) and Ⅱ_A cervical carcinoma were enrolled in study group,and were treated with neoadjuvant chemotherapy with cisplatin,vincristine and bleomylin for one cycle followed by radical hysterectomy and pelvic lymphadenectomy;another 51 patients as control group were treated with radical surgery alone.The tumor size,depth of stromal invasion,lymph node metastasis and involvement of surgical specimens were assessed.Results:The overall clinical response rate was 41.2%.There were no complete and progressive ones.The blood loss during operation was 116.82?45.50ml,it was significantly lower than that in control group(P

e factors of elder age, abdominal surgeries and malignant tumor.

Anesthesia modalities for endovascular treatment of acute ischemic stroke include general anesthesia and conscious sedation.Several recent studies have shown that the general anesthesia is associated with the poor outcome of endovascular treatment in patients with acute ischemic stroke.The underlying reason of causing worse outcome is unknown.It may be associated with hemodynamic instability and hypotension.Currently,it is considered that both general anesthesia and conscious sedation have their advantages and disadvantages.We must choose individualize anesthesia modalities for each patient before we obtain highquality evidence.

Objective To explore the pathogenicity of Campylobacter jejuni(CJ)O∶19 strain after deletion of neuB1.Methods The mutant of CJ O∶19 by deleting neuB1,which LPS is deficient in sialic acid,was compared with the homologous wild strain by assaying their sensitivity to bactericidal activity,motility and autoagglutination of 10% normal human serum(NHS).Results The sensitivity of the mutant strain to bactericidal activity of serum was superior to that of the wild strain.The survival rate of the mutant strain was(20.6?7.4)% and(9.6?3.6)% after incubation with 10% NHS for 15 min and 60 min,that of wild strain was(36.9?5.9)% and(15.5?4.3)% respectively.The wild and mutant strains showed no significant difference in sensitivity to motility and autoagglutination of NHS.Conclusion The mutant strain possesses remarkable pathogenicity so that an inactivated vaccine from the mutant strain should be first considered.

OBJECTIVE:To observe the clinical efficacy of compound glycyrrhizin combining desloratadine in the treat?ment of chronic urticaria.METHODS:103patients with chronic urticaria were randomly divided into treatment group which were treated with compound glycyrrhizin plus desloratadine and controlled group which were treated with single desloratadine.The courses of treatment for both groups were2weeks.RESULTS:The total effective rates of the treatment group and the controlled group were96.15%and82.35%,respectively.There were significant differences between the2groups(P

Objective To verify the applicable significance of confocal scanning laser retinal tomography in age-related macular degeneration (AMD). Methods Heidelberg confocal scanning laser tomography was used to measure 75 eyes of 59 patients with AMD, including 25 eyes of 20 patients with exudative AMD, 25 eyes of 16 patients with atrophic AMD , and 25 eyes of 23 patients with macular drusen. The differences of the width, volume and maximum height of Z profile signal of macula were analyzed. Results Z profile signal width in macular tomography of exudative AMD was wider than that of macular drusen; maximum height and volume in macular tomography of exudative AMD were larger than that of macular drusen (P

AIM To investigate the hypoglycemic effect of buccally delivered insulin solution (INS SOL) in normal rats. METHODS The hypoglycemic response was examined after buccal delivery of INS SOL co administered with various absorption enhancers. The pharmacological bioavailability (PA) was used to evaluate the absorption enhancement of INS SOL from the buccal cavity under various conditions compared with subcutaneous injection. RESULTS In the absence of enhancers, the PA was low(6 8%) after buccal delivery of INS SOL. However, the concomitant administration of sodium lauryl phosphate, sodium deoxycholate, Brij78 as well as lecithin appeared to be more effective in increasing the hypoglycemic effects of insulin. INS SOL (5 ??kg -1 ) containing 5% Brij 78 had the highest PA of 33%. CONCLUSION The use of proper absorption enhancers is useful for improving the buccal absorption of insulin.

Objective To survey the CT radiation dose to cancer patients,and to compare it with diagnostic reference level (DRL) provided by newly issued national standard.Methods Computed tomography dose index weighted (CTDIw) of 5 CT equipments was measured by the standard phantom with typical scanning protocol and radiation dose parameters including average computed tomography dose index volume (CTDIvol),dose length product (DLP),75％ DLP with 900 adult and 300 pediatric cancer patients were collected.According to age stage,effective dose was estimated.Results The measured CTDIw for head scanning was on the same level with DRL,while lumbar vertebra and abdominal scanning were lower than DRL.To adults,DLP of cerebrovascular enhanced scanning and effective dose of abdominal enhanced scanning were the highest.To pediatric patients,there was no significant difference in DLP among different ages.Conclusion CTDI only reflects the dose contribution from a slice,but do not reflect the cumulative dose.For the patients need multiphase scanning,because they may be exposed to high dose,national standard should provide DLP value as the diagnostic reference level.Using individual scanning protocol is an effective method to reduce radiation dose of pediatric patient.

ObjectiveTo analyze the correlations between bone mineral density and biochemistry data of health checkup receivers.MethodsA total of 3025 sets of medical measurements,including blood glucose,lipid profiles,blood uric acid,blood pressure and bone mineral density,were collected from January 2008 to November 2010 in Medical Examination Center of Peking Union Medical College Hospital.Bone mineral density of lumbar vertebra 1 - 4 (L1-4) and hip were recorded.Linear correlation analysis was used to investigate the correlation between bone mineral density and other factors. Results In multiple regression analysis,age,body weight,and alkaline phosphatase level were found to be related to male hip bone mineral density; age,body weight,alkaline phosphatase,and glutamyltranspetidase level were related to male L2-4 bone mineral density; age,body weight,alkaline phosphatase,and glutamyltranspetidase level were indicated to be related to female hip bone mineral density; age,body weight,alkaline phosphatase,and the ratio of neutrophile granulocyte were related to female L2-4 bone mineral density.ConclusionIn thisstudygroup, bodyweightwaspositivelycorrelatedwithbonemineraldensity, although alkalinephosphatase was negatively associated with bone mineral density.The role of blood glucose and lipid in the regulation of bone mineral density remains inconclusive.