Fiber bronchoscopy has been used in pediatric for decades,and has became the important diagnostic tools in pediatric respiratory diseases.with the improvement of fiber bronchoscope equipment and the advancement of operation technology,fiber bronchoscope has been expanded unceasingly in pediatric, especially in the critically ill children.As a common critical disease in pediatric,severe pneumonia is urgent, serious and high rate of mortality.As the effect of conventional antibiotic treatment is not ideal in current, while fiber bronchoscopy with the dual function of examination and treatment makes it use more and more widely in children with severe pneumonia.Fiber bronchoscopy can improve the effect of treatment in children with severe pneumonia,short the course of the disease,improve the prognosis of children,reduce the rate of mortality.

To improve the inulinase application in biotechnology, the characteristic of inulinase from Kluyveromyces marxianus YX01 was investigated. The inu gene of K. marxianus YX01 was transformed into Pichiapastoris GS115 host cells with molecular biology techniques. Then we achieved the heterologous expression of exo-inulinase whose molecular mass was about 86.0 kDa by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Furthermore, six His-tag was added to the inulinase and a two-step method was applied in the purification of inulinase, including concentration via dialysis by polyethylene glycol 20 000 and metal Ni-NTA Agarose affinity adsorption. The purification factor of purified protein was 3.6 and the recovery rate of enzyme activity was 33.1%. We characterized the purified inulinase. The optimum temperature was 60 degrees C and pH was 4.62. When inulin and sucrose were used as substrates, the K(m) and V(max) values were 80.53 g/L vs 4.49 g/(L x min) and 183.10 g/L vs 20.20 g/(L x min), respectively. In addition, metal ions including Mn2+, Ca2+, Cu2+, Zn2+ and Fe2+ exhibited different degrees of inhibition on the enzyme activity, and Cu2+, Zn2+ and Fe2+ exhibited the most significant inhibition. Our findings might lay a good foundation for industrial application of inulinase.
Glycoside Hydrolases ; chemistry ; genetics ; Industrial Microbiology ; Inulin ; Kluyveromyces ; enzymology ; genetics ; Pichia ; Sucrose ; Temperature

Objective To investigate the effect of ANX A1 on the biological characteristics of papillary thyroid carcinom cells by interfering with the expression of Annexina A1 (ANX A1) in papillary thyroid carcinoma cells through small interfering RNAs (siRNA).Methods The designed highly efficient siRNA was used to conduct the specific interfence on ANXA1 expression in the papillary thyroid carcinoma TPC-1 cells.The effect of ANXA1 on TPC-1 apoptosis in PTC was observed by flow cytometry.Results The designed siRAN could efficiently inhibit the expression of ANXA1 mRNA in PTC,enhanced the cell apoptosis in TPC-1 cells in vitro.Conclusion siRNA can interfere with the expression of ANXA1 and promote the apoptosis of papillary thyroid carcinoma which suggesting that ANXA1 may be an important biological target for the treatment of papillary thyroid carcinoma.

Objective To investigate the effects of quiet respiratory intrathoracic pressure changes on ventricular dimensions and left ventricular systolic function,and to further verify our newly proposed hypothesis of the mechanism of respiratory effects on hemodynamics.Methods Twenty healthy volunteers aged 18 to 40 years average(24?7) years were included.The respiratory curve and electrocardiogram were simultaneously recorded.The interventricular septum movement,ventricular dimensions and ventricular systolic excursions were recorded by two-dimensional and M-mode echocardiography during quiet respiration.The respiratory variations of the above parameters were derived,and the parameters for assessing ventricular systolic function were calculated.Results With quiet respiration,the interventricular septum moved towards the left ventricle on inspiration,and then towards the right ventricle on expiration.The right ventricular diastolic dimension increased significantly on inspiration compared with those on expiration.The opposite changes occurred with left ventricular diastolic dimensions.The left ventricular posterior wall systolic excursion and the left ventricular stroke volume significantly increased during expiration compared with those during inspiration.No significant differences were found in left ventricular ejection fraction and fractional shortening between inspiration and expiration.Conclusions The respiratory intrathoracic pressure change is one of the factors influencing the reciprocal changes of the left and right ventricular parameters related to ventricular dimensions and systolic function.

Objective To analysis the modified Gleason scoring system for predicting the prognosis after radical prostatectomy.Methods A total of 242 patients who received radical prostatectomy from April,2006 to October 2011 were recruited.The patients who lost follow-up or had adjuvant radiation or hormonal therapy or had visceral or bone metastasis were excluded,the remaining 168 patients were evaluated in the present study.The patients' age ranged from 53 to 85 years old (mean age 69 years old).The mean PSA level was 13.31ng/ml (ranging from 4.59 to 36.12 ng/ml).According to the traditional Gleason scoring system,there were 50 patients in Gleason ≤ 6 group,86 patients in Gleason 7 group and 32 patients in Gleason≥8 group.Patients were divided in five groups according to the modified Gleason scoring system.There were 50 patients in Gleason ≤6 group,67 in Gleason 3 + 4 group,19 in Gleason 4 + 3 group,15 in Gleason 8 group and 17 in Gleason 9-10 group.The biochemical-free-survival curve was drawn by Kaplan-Meier method and the multivariate Cox regression models were used to evaluate the clinical and pathological variables for the development of biochemical recurrence.ROC curve analysis was used to determine the predicted value for 5-year BCR of modified and traditional Gleason scoring.Results Significant differences were noted between the modified Gleason scoring groups and traditional Gleason scoring groups in PSA value (P =0.005),pathological stage (P =0.002),extraprostatic extension (P =0.003),seminal vesicle invasion (P =0.004),lymph node involvement (P =0.049) and positive surgical margin (P =0.006).With a median follow-up of 68 months(ranging from 7 to 98 months),5-year BFS rates for men with Gleason grade ≤6,3 + 4,4 + 3,8 and 9-10 tumours on RP pathology were 84.0％ (42/50),76.1％ (51/67),57.9％(11/19),40.0％ (9/15),29.4％ (5/17),respectively.On multivariate analysis,the HR value of Gleason 3 + 4 group and Gleason 4 + 3 group were 1.736 and 2.075 (P ＜ 0.05).The area under the curve in modified and traditional Gleason scoring were 0.698 (95％ CI 0.609-0.788) and 0.674 (95％ CI O.584-0.764),respectively.Conclusions The modified Gleason scoring system is related to the prostate cancer grade and its survival rate.Therefore,it can predict prognosis accurately in patients with prostate cancer.It can potential to reduce overtreatment in patients with Gleason 3 +4 prostate cancer.

ObjectiveTo study the methods of how to protect facial nerve function following complete resection of acoustic neurinomas and the value of the techniques of F wave assisted electrophysiological monitoring intraoperatively.Methods Retrospectivelysummarizing theresultsof combining three electrophysiological monitoring techniques such as nasal muscle F wave recording,online EMG and triggered EMG to monitor 46 cases of microoperations for acoustic neurinomas intraoperatively during the period of Feb.2004 to Dec. 2008. Correlating every intraoperative monitoring index with their follow-up results of facial nerve function 1 day and 6 months after their operations.The tendency of the two continuous monitoring techniques between nasal F wave recording and online EMG of facial muscles has also been studied in this paper. Results Among 46 cases of acoustic neurinomas, 45(97.83 %) tumors have been totally resected, and 1 (2.17 %) tumor subtotally resected,lcase (2.17 %)died after operation,and 2ases occurred the leakage of cerebrospinal fluid(CSF) which have been cured through conservative treatment. The whole anatomic protection rate of facial nerve is 97.83 %,and their functional protection rates 6 months after operation are:HB Ⅰ - Ⅱ,75.56 %;Ⅲ-Ⅳ,22.22 % and Ⅴ-Ⅵ,2.22 %.The completely accordant rate between the intraoperative findings of nasal F wave recording and online EMG is 52.17 %, partially accordant rate is 45.65 %, and totally opposite rate is 2.17 % (x2 趋势= 6.113, P ＜0.05). The intraoperative monitoring indexes in nasal muscle F wave recording are correlated well with the facial nerve function in the 6th month' s follow-up (κ=0.429, P ＜0.001).In triggered EMG monitoring after tumors being resected,the stimulus threshold ratio and maximum amplitude ratio of facial nerve between leaving brain stem part and inner acoustic porus part are also correlated well with the facial nerve function 6 months after operation(κ=0.576, P ＜0.001; κ=0.595, P ＜0.001). ConclusionNasal muscle F wa recording cooperated well with online EMG and triggered EMG intraoperatively and correlates well with the postoperative facial nerve function, so they should be routinely applied together intraoperatively.

Objective To id scuss the role and safety of fiberoptic bronchoscopy for diagnosing and treating respiratory dsi ease in PICU.Methods A total of 95 eil gible children with respri atory diseases admi-tted ni PICU of Hu′nan Prvo inec Children′s Hospital were enroll ed in this retrospectvi e study from January 2013t o December 2013, and the efficacy and complications of fiberoptic bronchoscopy were assessed.Results A total of 95 children underwented bronchoscopy 112 timest, he most common of microscopic examination resutl s was tracheal bronchitis ( 62.1%) , followed by congenital airway abnormality ( 21.1%); 58 times (56.9%) showed becteria positive in 102 times lavage and sputum culture results, including 16 times (27.6%) of Klebsiella pneumoniae bacteria,12 times(20.7%) of Acinetobacter baumannii.After under-wenting bronchoscopy and lavage wash,blood gas analysis of pH value,PaO2 ,PaCO2 ,SaO2 had significant improvement than before( P<0.05 ) , respiratory rate had improved than before ( P<0.05 ) , little effect in heart rate(P>0.05).The inrt aopear tive and postoperative transient comlp ications were obserev d in 38 times (33.9%).Conclusion The appil cation of fiberoptic bronchoscopy for diagnosing and ter ating disease in PICU has a cetr ia n value, its vo erall safety is reliable.

Objective To explore the changes of plasma corticotrophin releasing factor (CRF) levels in the young rats with hypoxic-ischemic brain damage.Methods Two hundred and forty young rats were randomly divided into three groups:hypoxic-ischemic brain damage group ( model group,n =80),sham-operated group ( n =80),and normal control group ( n =80).The plasma CRF levels of rats in three groups were detected at 1 h,3 h,6 h,12 h,l d,3 d,5 d and 18 d after hypoxia-ischemia,per ten rats for each time point.Plasma CRF levels were measured by radioimmunoassay.Results Plasma CRF levels of model group,shamoperated group and normal control group showed no significant difference in the young rats after 1 h,3 h,6 h,12 h of hypoxia-ischemia ( P ＞ 0.05 ).But plasma CRF levels in the model group were respectively significantly lower than those of sham-operated group and normal control group after 1 d and 3 d of hypoxia-ischemia ( P ＜0.001 ),and then recovered to the control group levels after 5 d and 18 d of hypoxia-ischemia ( P ＞0.05 ).Conclusion Hypoxia-ischemia affects plasma CRF levels in the young rats,which is related with the duration after hypoxia-ischemia.

AIM Xiaobuxin-Tang (XBXT) is a traditional Chinese herbal decoction which is composed of Haematitum, Flos Inulae, Folium Phyllostachydis Henonis and Semen Sojae Preparatum. The present study was to investigate if the total flavonoids extracted from XBXT (XBXT-2) had antidepressant effect. METHODS Forced swimming tests in mice and rats, and learned helplessness (LH) model of rats were adopted to affirm the antidepressant effect of XBXT-2 with the test on spontaneous motor activity. Plasma corticosterone level in the LH rats was measured with ELISA. RESULTS Single administraton of XBXT-2 at the doses of 50 and 100 mg·kg-1 (ig) significantly decreased the duration of immobility time in the forced swimming tests in mice and rats. Researches on LH model of rats indicated that XBXT-2 at doses of 50 and 25 mg·kg-1 markedly reduced the number of escape failure in shuttle box. Meanwhile, the plasma corticosterone level of the LH rats was significantly decreased. XBXT-2 50-200 mg·kg-1 had no effects on spontaneous motor activity in mice. CONCLUSION XBXT-2 possesses significant antidepressant-like effect. The mechanism may involve the inhibition of the hyperaction of the hypothalamic-pituitary-adrenal axis.