Objective To investigate the inhibitory effect of siRNA targeting casein kinase 2 (CK2α)gene on the growth of HCT1 1 6 cells and to clarify its mechanism.Methods CK2α-siRNA sequence was designed according to mRNA sequence of CK2α. The in vitro cultured HCT1 1 6 cells were divided into normal control group (without transfection),negative control group (transfected with siRNA)and CK2α-siRNA group (transfected with CK2α-siRNA ),and the HCT116 cells were transfected with Lipofectamine 2000.The expression levels of CK2α,cyclin H,P53,and P21 proteins in the HCT116 cells were detected by Western blottting method,and the proliferation activities of the HCT116 cells were detected by MTT method,and the cell cycle was measured by flow cytometry. Results Compared with negative control group,the expression levels of CK2α,and cyclin H proteins in CK2α-siRNA group were decreased(P<0.01);the expression level of P53 protein had no change dramatically(P>0.05), and the expression level of P21 protein was increased significantly(P<0.01).Compared with negative control group,the survival rate in CK2α-siRNA group was decreased markedly 48 and 72 h after transfection detected by MTT method(P<0.01).Flow cytometry analysis showed the percent of the cells at G1 phase in CK2α-siRNA group was significantly higher than that in negative control group and the percent of the cells at S phase in CK2α-siRNA group was lower than that in negative control group(P<0.01),and the cell cycle was arrested at G1 phase. Conclusion siRNA targeting CK2αcan inhibit the proliferation of HCT116 cells and induce the arrest of G1 phase, which may be associated with inhibiting the expression of cyclin H and recovering the P53 activity after silencing CK2α.

Objective To find the possible relationship between defects in the FA/BRCA pathway of genomic maintenance and potential pathogenesis of acute myeloid leukaemia.Methods Twenty-five AML cell lines derived from diverse subtypes of AML were screened to investigate for possible defects in FA,BRCA patllway.Results The absence of FANCN protein in two cell lines,THP-1 and M-07e were observed,which was correlated with the results of MMC-induced G2 arrest,growth inhibition and chromosomal breakage test in both cell lines.But no gene aberrance in these two cell lines by MLPA test and DNA sequencing were found.Conclusion There is a possible relationship between defects in the FA/BRCA Dathway and potentialpathogenesis of acute myeloid leukaemia.A disturbance of theFA pathwaymay represent an early event in the development of this type of leukaemia.

0.05).Conclusion Serum leptin play an important role in puberty of girls and closely is correlated with BMI and BF% regardless of age and sex in 6-14 years old children in poor rural areas.

AlM: To investigate the effect of exogenous peroxisome-proliferator-activated receptor-γcoactivator-1α ( PGC-1α) on vascular endothelial growth factor ( VEGF) expression in human retinal vascular endothelial cells ( HRVEC) .METHODS:Recombinant PGC-1α protein was added to HRVEC, and no recombinant PGC-1α protein was added to HRVEC as control group. After 24h of incubation, two groups of cells were then placed into a normoxic ( 20%O2 ) or hypoxic ( 1% O2 ) environment for another 16h. The expression of VEGF mRNA and protein were detected by real - time PCR, ELlSA and immunofluorescence cytochemistry.RESULTS: VEGF mRNA and protein levels in the cells were significantly increased by recombinant PGC - 1αprotein both under normoxia and hypoxia conditions as compared with control groups (P<0. 01).CONCLUSlON: PGC-1α can upregulate the expression of VEGF in HRVEC under normoxia and hypoxia conditions.

Objective To explore the effects of PSE on hemodynamics and Liver function in LCPH. Methods 30 patients with LCPH are treated by PSE. The hemodynamics changes of patients with LCPH are evaluated with color Doppler diasonograph. The changes of main clinical features which is related to LCPH , serum ALT and albumn were investigated . Results The hemodynamics indexs of LCPH are all changed significantly (P0. 05) between four and two weeks after PSE. But the main symptoms, signs of LCPH and liver function are improved after PSE . Conclutions PSE plays an important role in hemdynamics and liver function of LCPH. After PSE, Portal hypertension decreases effectively and liver function is improved.

Objective To study the changes of leptin and insulin-like growth factor-Ⅰ (IGF-Ⅰ) in adoles-cents with anorexia nervosa(AN) before and after three months of therapy. Methods The plasma levels of leptin and IGF-Ⅰ were measured in 11 adolescents with AN before and after three months of therapy and 11 normal ado-lescents of the same age,and their height,weight were examined and their body mass index(BMI) was calculated,and the results were compared before and after therapy, and were compared with those from age-matched normal adolescents respectively. Results (1)The plasma levels of leptin and IGF-Ⅰ , as well as the BMI in the AN patients after three months of therapy were significantly higher, than those before the therapy, and both were significantlylower than those in the controls. (2)Significant correlations between the plasma leptin levels and IGF-Ⅰ and BMI were detected in the AN patients both before and after the therapy, as well as in the controls. (3)Significant correla-tions between the plasma leptin levels and IGF-Ⅰ were detected in the AN patients both before and after the thera-py, as well as in the controls. Conclusion The plasma levels of leptin and IGF-Ⅰ resulted in significant changes, and these changes were consistent with body fat content in adolescents with AN.

Objective To investigate the effect of EST on function of sphincter of Oddi and on the long-term complications.Methods A total of 68 patients with common bile duct stones were recruited from January 2009 to January 2013 in The First People's Hospital of Hangzhou.All patients were under follow-up to observe the incidence of late complications after EST.Oddi sphincter manometry and bile bacterial culture were performed before EST and one year later.Results With the 13-36 months follow-up,the incidence of late complications was 16.9％ (11/65).The peak pressure and frequency of contraction of Oddi sphincter after EST were significantly lower than those before EST,but there were no significant differences between patients with complication and without (P ＞ 0.05).After EST,positive rate of biliary bacteria in patients with complications was much higher than that in patients without complications [70％ (7/10)vs.31.7％ (13/41),P =0.026],although there were no significant differences between them before EST [54.5％(6/11) vs.46.3％ (25/54),P =0.618).Logistic regression analysis showed that cholecystolithiasis,bile duct diameter (＞ 1.5 cm),number of stone (＞ 3),maximun diameter of stone (＞ 20 mm),large EST were independent risk factors for late complications of EST.Conclusion Importance should be attached to the late complications of EST with Oddi sphincter function declination,and biliary enteric reflux being the basic factor in late compilations after EST,which are also influenced by many risk factors.

Child ; Critical Care ; Humans ; Intensive Care Units, Pediatric ; Medical Records ; Severity of Illness Index

Objective:To analyse the methord and effects of intermaxillary traction(IMT)screws used in the treatment of jaw frac-ture.Methods:In the treatment of 1 68 cases of jaw fracture IMT screws were used for the restoration of normal and stable occlusion. The screw number,position,traction effect and postoperative complications of the treatment were analysed.Results:705 screws were used in 168 patients,4 screws were used in each of 147 cased (88%),6 in 12(7%),5 in 9(5%).336(47.7%)screws were fixed between the roots of first and second premolar,292(41 .4%)between the roots of canine and first premolar,50 (7.1%)be-tween the roots of second premolar and first molar,27(3.8%)between the other tooth roots.Normal postoperative occlusion relation was achived by the use of screws in 92 cases without traction.Occlusion disharmony or deviation was found in 76 cases by the used of screws and was restored to normlal by 1 4-day traction in 71 cases.The total efficiency of the treatment was 97%.Pain of the mucosa surrounding the screws was observed in 23 cases (1 3.7%).Root damage,traction screw loosening and adjacent tooth dislocation were observed in 1 3(1 .8%),1 1 (1 .6%)and 2(0.3%)cases respectively.Conclusion:For the fixation of IMT screws,the posi-tions between tooth root from canine to first molar were most common and safe.The fixation point should be in 5 ~8mm below the gin-gival margin.Use of 4-6 screws can meet treatment need.

Air Pollutants, Occupational ; analysis ; Chromatography, Gas ; methods ; Dimethylamines ; analysis ; Methylamines ; analysis ; Workplace