OBJECTIVE:To compare the distribution of levofloxacin in lung of mice after intragastric and intravenous adminis-tration of Tanreqing injection combined with levofloxacin. METHODS:144 mice were randomly divided into experimental group and control group,with 72 mice in each group. Both groups were given Tanreqing injection(0.8 ml/kg). 1 h later,control group was given Levofloxacin injection(80 mg/kg)intravenously,and experimental group Levofloxacin tablet solution(80 mg/kg)intra-gastrically;every 8 mice were sacrificed for lung tissue collection at the time points of 0.05,0.083,0.17,0.5,1.0,2.0,4.0,8.0, 12.0 h and 0.083,0.17,0.33,0.5,1.0,2.0,4.0,8.0,12.0 h,respectively. Using ciprofloxacin as internal standard,the content of levofloxacin in lung tissue was determined by HPLC,and pharmacokinetic parameters were calculated by 3p97 program. RE-SULTS:The concentration-time curves of levofloxacin in lung tissue were in line with two-compartment model in 2 groups. The main pharmacokinetics of experimental group and control group were as follows as t1/2β of(4.17±0.84)h and(4.10±0.55)h;CL of(0.66±0.049)L/h and(0.71±0.21)L/h;AUC0-t of(109.48±12.34)mg·h/kg and(113.04±29.43)mg·h/kg;cmax of(38.76± 1.62) mg/kg and (42.28 ± 2.03) mg/kg,respectively. There was no statistical significance (P>0.05). Absolute bioavailability of levofloxacin was(96.85±17.39)% in experimental group with intragastric administration. CONCLUSIONS:After intravenous injec-tion of Tanreqing injection,the distribution of levofloxacin in lung tissue of mice are similiar between intragastric administration and intragastric administration.

Objective To investigate the expression of nerve growth factor(NGF) and slouble Fas(sFas) in children with viral myocarditis(VM),and the relationship with immunity,with the aim to provide evidence and basis for the diagnosis and treatment of VM.Methods The serum levels of NGF and sFas were detected by two-site enzyme-linked immunosorbent assy(ELISA) in 43 children with VM,and 20 normal heathy children as controls.Results The serum levels of both NGF and sFas in children with the acute stage(course in less than month and 1-2 months)and the procrastinate and chronic stages of VM were significantly higher than those of healthy children(P0.05).Conclusion The increased serum expression levels of NGF and sFas are related to the process of viral myocarditis,which confirms the relationship between the onset of VM and immune factors.

Objective To investigate the technical feasibility and oncological safety of EPMR for early esophageal cancer and precancerous lesions. Methods Clinicopathological data, procedure quality and complications of 70 patients with early esophageal cancer or precancerous lesions were retrospectively ana?lysed. The technical safety and feasibility were assessed, and the complications were investigated through postoperative surveillance. The results were compared with published data from two high?quality meta?analysis studies on ESD. Results In a total of 70 patients who underwent EPMR, 35?7%( 25/70) were diagnosed as having early esophageal cancer and 64?3%( 45/70) atypical hyperplasia. And tumor size greater than 2 cm was 78?6%(55/70). The mean EPMR time was(28?31±9?49) minutes. The R0 resection rate of EPMR was 88?6%(62/70) and no perforation occurred. The bleeding rate was 21?4%(15/70). The esoph?ageal stricture rate was 1?4%( 1/70) . The recurrence rate was 2?9%( 2/70) . Compared with published ESD data from the two studies, EPMR showed shorter procedure time, lower curative rate and lower rates of stric?ture and perforation, but slightly higher rates of bleeding and recurrence. Conclusion Both EPMR and ESD are feasible and effective for early esophageal cancer and precancerous lesions. The curative results of EPMR are similar to ESD, with shorter procedure time, but higher bleeding and recurrence rates.

Objective To study the effect of temperature on the emission of tbrmaldehyde trom the blockboard.Methods A 0.25 m3 simulation chamber was used to explore the emission of formaldehyde from blockboard at the temperature of 15,17,19,21, 23,25,27,and 29 ℃,respectively.The relative humidity,the ventilation velocity and the loading factor in simulation chamber was (50?1)%,1.0 L/min,and(1?0.03)m~2/m~3 respectively.Results A hyperbolic logarithm variation in formaldehyde concentration with time in the chamber was observed at different temperatures.Formaldehyde concentration in the chamber increased remarkably once the temperature exceeded 25 C.The chamber stabilization formaldehyde concentration varied with temperature in accordance with an exponent equation of y=0.921 9?0.024 9e~(0.176 4x)(R~2=0.996 9).Conclusion The temperature can greatly influence formaldehyde emission from the blockboards.Higher temperature will facilitate formaldehyde emission from the blockboards.

Objective To investigate the protective effect and mechanism of betaxolol on optic nerves after experimental retinal ischemia-reperfused injury. Methods Retinal ischemia was induced in SD rats by increasing intraocular pressure through intracameral infusion. Sixty-eight rats were randomly divided into 3 groups: normal control (eight rats), 0.25% betaxolol treatment (thirty rats) and saline control group (thirty rats). The latter two groups were subdivided into group 1 day, 3 and 7 days after reperfusion, respectively, with 10 rats in each group. Betaxolol and normal saline was applied to the right eyes of the rats in the treatment group and to the ones in normal saline control group, respectively. The amplitude of b-wave of electron retinograph (ERG) was observed and the histological and ultrastructural changes were detected by light and electron microscopy. The expression of neural nitrogen oxide synthase (nNOS) was detected by immunohistochemistry. The content of malonyldialdehyde (MDA) and the superoxide dismutase (SOD) activity were measured by spectrophotometer. Results [WTBZ]Began from the first day after reperfusion, in saline control group, the amplitudes of ERG b-wave reduced continuously, the histopathological damages of retina were aggravating, the expression of nNOS increased, MDA level increased and SOD level decreased persistently, which significantly differed from the normal control group (P0.01). Conclusion Betaxolol, by reducing intracellular overfreight of Ca~(2+),inhibiting production of NO and elevating the ability of anti-oxidation in rat retina, can protect retinal neurons from ischemia-reperfused injury.

Objective To explore the significance of CRP in the diagnosis and treatment of pediatric diseases. Methods The highest CRP value and the total number of white blood cells of hospitalized children during hospitalization were detected ,divided into 6 groups according to the level. To compare the relationship among the total number of WBC,CRP and PCT of each group in the infectious diseases and compare the changes of the total number of WBC and CRP before and after treatment. Results CRP and serum procalcitonin (PCT) was positively correlated (P ＜ 0.01), but a large part of white blood cells did not associate with the PCT. In total white blood cells of 6 groups,3 groups had no statistically significant changes before and after treatment, while the CRP abnormal changes of 5 groups before and after treatment was statistically significant(P ＜0.05). Conclusion CRP was not only as the initial identification of indicators of the children with bacterial infections and viral infections,but also reflected the severity of inflammation. CRP should be used as a routine examination of outpatient with fever, associated with the analysis of the white blood cell could play an important role in reducing the abuse of antibiotics.

Objective To investigate the quantitative abnormality of CD~+_5B lymphocytes in the bone morrow of the patients with autoimmunic hemocytopenia and its clinical significance.Methods The patients were referred to the Institute of Hematology & Blood Diseases Hospital,Chinese Academy of Medical Sciences & Peking Union Medical College.Quantities of CD~+_5B lymphocytes in the bone morrow of 14 patients with autoimmune hemolytic anemia(AIHA)or Evans syndrome,22 immunorelated pancytopenia(IRP)patients and 10 normal controls were assayed by FACS.The correlation between their clinical and laboratory parameters with CD~+_5B lymphocytes was analyzed.Results The qutantity of CD~+_5B lymphocytes were significantly higher in AIHA and Evans and IRP patients than in normal controls;there was no significant difference between AIHA、Evans syndrome and IRP patients.The qutantity of CD~+_5B lymphocytes in the bone morrow of all cytopenic patients showed negative correlation with C_3 complement.In AIHA、Evans syndrome patients,the quantity of CD~+_5 B lymphocytes in their bone morrow showed positive correlation with IBIL.In Evans syndrome patients,the quantity of CD~+_5B lymphocytes in their bone morrow showed positive correlation with PAIgG and PAIgM.The qutantity of CD~+_5B lymphocytes in the bone marrow of all cytopenic patients showed negative correlation with treatment response,but no correlation with the yields of CFU-E、 BFU-E、CFU-F and CFU-GM cultured from their bone marrow mononuclear cells in vitro.Conclusion CD~+_5B lymphocytes in the bone marrow of the patients with autoimmunic hemocytopenia significantly increase and are related to the disease severity and clinical response.It is suggested that CD~+_5B lymphocytes might have important roles in the pathogenesis of autoimmunic cytopenia.

Objective To investigate cancer suppressor Genes p16, p15 in the brain gliomas expression and its relations with the gliomas pathology graduation and the malignant degree.Methods P16 and P15 protein expression level in human brain gliomas from 63 surgery specimens were assayed by immunobistochemical S-P method.Results P16, the P15 protein expression rate the brain gliomas pathology graduation assumes the inverse correlation with, also compared with the high malignant group the low malignant group (Ⅰ~Ⅱ level) (Ⅲ~Ⅳ level) has the remarkable difference (P

0.05). Conclusions The expression of p16、 C-erbB-2 protein is correlated with gastric cancer and p16、C-erbB-2 protein can be used to evaluate the biological behavior and prognosis of gastric cancer.

Objective To investigate the changes of serum 8-hydroxy-2'-deoxyguanosine(8-OHDG) in Kawasaki disease (KD) children and to explore the importance of 8-OHDG in predicting the severity of coronary artery lesions in Kawasaki Disease.Methods The serum 8-OHDG was measured in KD patients group (n =60),fever patients group (n =12) and health control group (n =12) by ELISA method.Among the KD patients,30 KD patients were in acute stage (10 cases had coronary artery lesions,20 coronary were normal) and 30 patients were in recovery stage.The serum 8-OHDG and brain natriuretic peptide (BNP) were also compared between patients with coronary artery lesions (CALs) and patients with no coronary artery lesions NCALs).ROC curve analysis was used to test the 8-OHDG and BNP predictive values in KD with coronary artery lesions.Results The serum level of 8-OHDG was higher in acute KD patients than recovery KD patients,fever patients and healthy children (P ＜ 0.05) The serum 8-OHDG was higer in CALs patients than the NCALs patients (P ＜ 0.05).The serum BNP was higer in CALs patients than the NCALs patients (P ＜ 0.01).Analysis of the ROC curve showed that serum 8-OHDG had a positive predictive value of 64.3％ and a negative predictive value of 93.8％for distinguishing KD with CALs from KD NCALs when cutoff value was 57.02pg/ml.The area under the curve was 0.820.The serum BNP had a a positive predictive value of 47.6％ and a negative predictive value of 100％ for distinguishing KD with CALs from KD NCALs when cutoff value was 815pg/ml.The area under the curve was 0.745.Conclusion The serum 8-OHDG may have better predictive value than BNP in diagnose KD children with coronary artery lesions.