Thrombospondin-1 expresses in a variety of tumors and induces endothelial cell apoptosis,thus inhibits tumor angiogenesis and prevents tumor growth.It function domain ( Type I sequence):3TSR,retaines the function of inhibit angiogenesis,has the certain practical significance in clinical cancer treatment.

ve To determine the most approprite hypoxic concentration and duration for prenatal hypoxic adaptation animal experiment by exposing pregnant rats to the hypoxic air of different oxygen concentration.Methods Full-term pregnant rats( gestation time 22 days) were placed in an airtight cabin specially designed for hypoxic adaptation experiment. The rats were divided into 7 groups. The Q2 concentration in the airtight cabin was decreased from 21% (group Ⅰ as control) to 18% (group Ⅱ), 17% (group Ⅲ), 16% (group Ⅳ), 15% (group Ⅴ), 14% (group Ⅵ) and 13% (group Ⅶ) respectively. The animals were exposed to short duration of hypoxic air twice with a break of 5min breathing fresh air. The duration of the first hypoxic episode lasted 10 min (group Ⅰ ) , 5 min (group Ⅱ), 7.5min (group Ⅲ), 9.83 min (group Ⅳ), 11.5 min (group Ⅴ), 13.17 min (group Ⅵ) and 14 min (group Ⅶ) respectively. The second hypoxic episode lasted 10min, 9.33 min, 11 min, 15.17 min, 13.33 min, 17 min and 18 min respectively. Ten newborn rats (1 day after birth) randomly selected from each group were placed in a 100ml airtight bottle and the duration from the start to the time when the newborn rat stopped breathing was recorded as hypoxia surviving time. Another 10 newborn rats randomly selected from each group were decapitated and brain was removed for light and electron microscopic examination to determine the degree of neuronal damages. Results In group Ⅰ-Ⅴ the newborn rats were normal (pink skin color and good extremity movement) . In group VI 10/55 (18%) newborn rats were cyanotic with diminished extremity movement, the others were normal. In group VIII 11/52(21% ) newborn rats died, 14/ 52(27%) were cyanotic with diminished extremity movement. Neuronal damages could be seen in cyanoticnewborn rats including decreased number, swelling, apoptosis of neurons and expanded mitochondria. The hypoxia surviving time was significantly longer in group Ⅳ, Ⅴ and Ⅵ than that in control group. Conclusions Hypoxic air containing 15% O2 is appropriate for animal experiment of prenatal hypoxic adaptation. It is better to divide prenatal hypoxia into two episodes lasting 11.5 min and 13.33 min with a break of 5 min between them when animals breathe fresh air.

Objective To probe the pathogenesis of ventilator associated pneumonia (VAP) and their resistance to antibiotics of children in pediatric intensive care unit (PICU). Methods A clinical trial in 308 VAP episodes of 134 patients in PICU receiving mechanical ventilation was made. The pathogens and their drug resistance were analyzed. Results A total of 498 pathogen strains were isolated by bacterial culture. The major pathogenic bacteria in VAP were the gram-negative bacilli accounting for 416 strains (83.5%); the gram-positive bacteria were 66 strains (13.2%), staphylococcus aureus 35 strains (7.0%); methicillin-resitant staphylococcus aureus 22 strains (4.4%); staphylococcus epidermidis 19 strains (3.8%); methicillin-resitant staphylococcus epidermidis 11 strains (2.2%); all staphylococcus were sensitive to vancomycin; the fungi were 16 strains (3.2%). Among pathogens, the most common pathogens associated with VAP were klebsiella pneumoniae 155 strains (31.1%), aci netobacter baumanii 56 strains (11.2%), pseudomonas aeruginosa 54 strain (10.8%), escherichia coli 39 strains (7.8%) and staphylococcus aureus 35 strains (7.0%). Their multiple drug-resistance to antibiotics was serious. Drug sensitivity tests indicated that the gram-negative bacilli had lower drug-resistance to such antibiotics as imipenem, amikacin, piperacillin/tazobactam, ceftazidime, cefepime, cefoperazone/sulbactam, ciprofloxacin and amoxycillin/clavulanate. Drug sensitivity tests indicated that the gram-positive bacilli bad lower drug-resistance to such antibiotics as vancomycin, cefazolin, rifampicin, cefaperazone/sulbactam and bad higher drug-resistance to penicillin G and amoxycillin/clavulanate. Polymicrobial pathogens were more isolated in late-onset VAP than those in early-onset VAP. Conclusions The major pathogens in VAP are gram-negative bacilli and there are often multiple drug-resistant and fungus infection was common. It was suggested that the adequate initial empiric antimicrobial treatment should base on the surveillance of etiology and resistance.

Objective　To explore the significance of the dynamic changes of pro-and anti-inflammatory cytokines in the onset and development of acute panreatitis (AP). Methods　Pro-inflammatory cytokines TNFα, IL-1β, IL-6, and IL-8 and anti-inflammatory cytokines IL-10 and IL-1ra in the plasma of 48 patients with AP and 20 healthy individuals were determined with ELISA. Results　The levels of all pro-and anti-inflammatory cytokines in plasma was significantly higher in AP patients than in control group (P<0.05) in early stage of the disease, and then all levels were decreased gradually, consistent with the alterations of clinical symptoms of the AP patients. Conclusion　The dynamic changes of pro-and anti-inflammatory cytokines might play important role in the onset and development of AP.

Objective To explore the changes and significance of blood sugar,C-reactive protein(CRP)and blood gas in children with infantile pneumonia associated with systemic inflammatory response syndrome(SIRS).Methods Levels of blood sugar,blood gas and CRP were measured in 72 children with pneumonia associated with SIRS(divided as Group A),at the same time,the measured results in Group A were compared to those in children with pneumonia of non-SIRS(Group B)and normal children(control group).Results There was insignificantly higher than control group(t=3.274,P0.05),the levels of blood sugar and CRP in Group A were all significantly higher than those in Group B(t=9.9498,P

The sera of 40 normal controls,61 cases of various malignant diseases except pancreatic cancer,53 cases of various henign diseases,and 33 cases of pancreatic cancer were examined with ELISA to determine the serum level of pancreatic cancer-associated antigen(PCAAc).Its normal value was 12.59?6.34 mg/L(x?s),and the value was 57.25?82.93 mg/L in the pancreatic cancer group,which was significantly higher than the normal value and that of the other malignant disease group(P

Objective To assess the relationship between auditory evoked potential (AAI) index and plasma concentration of propofol administered by target-controlled infusion (TCI) in Chinese.Methods Ten ASA Ⅰ～Ⅱ tumor patients (5 males,5 females) scheduled for elective abdominal surgery under general anesthesia was enrolled in this study.Age ranged from 34 to 61 years,body weight from 52 to 79 kg and height from 155 to 178 cm.Radial artery was cannulated for blood sampling.The patients were premeditated with intravenous injection Midazolam 0.06 mg/L.Anesthesia was induced by fentanyl 2μg/kg,vecuronium 0.1 mg/kg and TCI of propofol which the target plasm concentration was set at 3 mg/L.After intubation,the target plasma concentration of propofol was adjusted at 1.7～2.5 mg/L.Vecuronium was continuous infusions at 2～3mg/h.Anesthesia was maintained with fentanyl-TCI of propofol-vecuronium and inhalation of 0.5 MAC isoflurane.The TCI system was composed of Base Primea company orchestra infusion pump using,the schnider pharmacokinetics model.ECG,Bp,HR,PETCO2,SpO2 and TETISO were monitored during anesthesia.Danmeter company A-line depth of anesthesia monitor recorded AAI index.Blood samples were taken at induction of anesthesia (To baseline),1,3,5,10,15,30,60 min (T1-7) and after cessation of infusion 10 and 20 min (T9-10).Plasma propofol concentration were determinated by fluorescence photometry.Results Compared with target concentrations,the measured concentrations of propofol were significantly lower during TCI(P＜0.05).There was negative correlation between AAI and plasma propofol concentrations(r=-0.818,P＜0.01).Conclusion On base of the Schnider pharmacokinetics model,the target propofol concentrations are not paralleled to plasma propofol concentrations which is descending with time prolongation.From negative correlation between AAI index and plasma propofol concentrations,AAI index will reflect indirectly plasma propofol concentrations.

Medicine, Chinese Traditional ; methods ; Systems Biology

Child ; China ; epidemiology ; Continuous Positive Airway Pressure ; Humans ; Sleep Apnea, Obstructive ; diagnosis ; epidemiology ; therapy ; Tonsillectomy

Objective To evaluate the effects of sevoflurane on β-amyloid (Aβ)-induced cognitive dysfunction and oxidative stress response of hippocampal tissues in rats.Methods Ninety-six male adlut SpragueDawley rats,weighing 250-300 g,were randomly divided into 4 groups (n =24 each) using a random number table:control group (group C) ; group Aβ ; 1.3 ％ sevoflurane group (group S1) and 2.6 ％ sevoflurane group (group S2).The animals were anesthetized with intraperitoneal.10％ chloral hydrate 350 mg/kg.Cognitive dysfunction was induced by injecting Aβ1-40 2 μ1 into the bilateral hippocampi in Aβ,S1 and S2 groups.The equal volume of normal saline was given in group C.At 22 days after injection,C and Aβ groups were exposed to 30％ oxygen for 4 h,and S1 and S2 groups inhaled 1.3 ％ and 2.6 ％ sevoflurane,respectively,for 4 h.Eight rats were chosen at days 1,3 and 7 after exposure and cognitive function was assessed by Morris water maze test.The swimming speed,escape latency and exploration time at the original platform quadrant were recorded.The rats were then sacrificed after the end of the behavioral test and blood samples were taken for determination of serum S100β protein concentration.Hippocampi were immediately isolated and the homogenate was prepared for determination of superoxide dismutase (SOD) activity and malondialdehyde (MDA) content.Results Compared with group C,the escape latency was significantly prolonged and exploration time at the original platform quadrant was shortened,the serum S100β protein concentration and MDA content were increased,and SOD activity was decreased at each time point in group Aβ (P ＜ 0.05).There were no significant differences in the variables mentioned above between Aβ and S1 groups (P ＞ 0.05).The escape latency was significantly prolonged and the exploration time at the original platform quadrant was shortened,the serum S100β protein concentration and MDA content were increased,and SOD activity was decreased at each time point in group S2 as compared with Aβ and S1 groups (P ＜ 0.05).There was no significant difference in the swimining speed among the 4 groups (P ＞ 0.05).Conclusion Inhalation of 2.6 ％ sevoflurane for 4 h can aggravate the cognitive dysfunction induced by Aβ in rats and aggravation of oxidative stress response may be involved in the mechanism.