Objective To compare the cell-killing and sensitization effect of 6-gingerol on human hepatoma carcinoma (HepG-2) cell in normal mode versus hypoxia-hypoglycemia mode in chemotherapy.Methods The HepG-2 cells was cultured to logarithmic phase and treated with adriamyein doxorubicin hydrochloride (ADM) (5,10,15,20,40,60 mg/L) and 6-gingerol(25,50,100,200 μmol/L)in different concentrations.Then the cell counting kit (CCK-8) assay kit was used to determine the proliferation inhibition of HepG-2 cells.Cell apoptosis was detected by combining flow cytometry and AnnexinV-FITC PI double staining after treated with different drugs.The expressions of bcl-2,bax and birc-5 mRNA in HepG-2 cells was detected by real time fluorescence quantitative polymerase chain reaction(RT-PCR)assay.Results 6-gingerol and ADM had a certain degree of growth inhibition on HepG-2 cells.In two modes,the inhibition ratios of the 6-gingerol and ADM were both increased along with the increase of the concentration,which showed a dose-dependent manner.Flow cytometry analysis demonstrated that the apoptosis rate in the control group,6-gingerol group,ADM group and the 6-gingerol+ADM group in the normal mode was (7.98±0.76)％,(9.63 ± 1.00) ％,(12.70 ± 2.13) ％ and (19.92 ± 1.41) ％ respectively.The apoptosis rate in the control group,6-gingerol group,ADM group and the 6-gingerol+ ADM group in the hypoxia-hypoglycemia mode was (13.92 ± 2.02)％,(19.36 ±-1.22)％,(27.87 ± 0.99)％ and (38.63 ± 2.25)％ respectively.It demonstrated that the apoptosis rate was increased in the experimental groups as compared to the control group under the two culture conditions(the normal mode and the hypoxiahypoglycemia mode)(t=7.250,5.259,12.185,8.140,15.000,47.576,respectively,all P＜0.05,0.01 or 0.001).The combination group had the highest number of apoptosis cells,and the number of apoptosis cells was higher in hypoxia-hypoglycemia group than in normal culture group.Real-time PCR analysis showed that,compared with the control group,the expressions of bcl-2 and birc-5 mRNA were decreased and the expression of bax mRNA had no significant changes in experimental group under the normal culture conditions.The expressions of bcl-2 and birc-5 mRNA were significantly decreased and the expression of bax mRNA was increased in experimental group as compared with the control group under the hypoxia-hypoglycemia conditions.Under the hypoxiahypoglycemia environment,the expression of bcl-2 mRNA was significantly increased,the expressions of bax and birc-5 mRNA was significantly reduced,and the ratio of bcl-2 and bax was significantly increased as compared with the normal culture conditions.Conclusions 6 gingerol may decrease the inhibitory effect of survivin protein on tumor cells apoptosis by reduced the expression of birc-5,which generates the cell-killing and sensitizing effect on HepG-2 cell in chemotherapy.This performance is more obvious in the hypoxia-hypoglycemia environment.

A molecularly imprinted polymer (MIP) using benzoic acid as template molecule, 4-vinyl pyridine (4-VP) as functional monomer, ethylene dimethacrylate (EDMA) as cross-linker, was prepared by bulk polymerization. The needle-type gas concentrator was developed using the MIP as adsorption medium. The device was coupled with gas chromatography (GC) for the analysis of volatile organic compounds (VOCs). The effect of polymerization conditions on adsorption property, such as polymerization time, ratio of the reagents, pre-polymerization time, type of solvents, type of template molecules, has been evaluated. The results of gas chromatographic analysis demonstrated that the optimum conditions for getting the best adsorption performance of the synthesized were polymerization time 6 h at 60 ℃, the ratio of the reagents (template molecule : functional monomer : cross-linker) 1∶ 4∶ 20, pre-polymerization time of 3 h, acetonitrile as solvent, benzoic acid as template.

Objective To investigate right ventricular(RV) dyssynchrony in patients with pulmonary hypertension(PH)by strain imaging.Methods Sixty PH patients were divided into three groups according to the pulmonary artery systolic pressure(PASP),20 healthy volunteers served as control group.RV structures parameters included RV end-diastolic area(RVEDA),end-systolic area(RVESA),the ratio of RV diameter and LV diameter(RVTD/LVTD).RV function parameters included RV fractional area change (RVFAC)and Tei index.RV strain parameters included the maxmal differences of the peak systolic strain(Max-ΔPST)and the maxmal differences of the time to peak systolic strain(Max-ΔT_(Q-S))of each segment.Results Compared with control group, Max-ΔT_(Q-S) and Max-ΔPST of PH groups were significantly larger (P<0.01).Max-ΔT_(Q-S) had strong correlations with PASP and RV structure and function parameters(P<0.01).Max-ΔPST had good correlations with PASP and Tei-index(P<0.05,P<0.01).Conclusions PH patients exhibit right ventricular dyssynchrony which correlates with right ventricular function and structure parameters.Right ventricular dyssynchrony parameters could evaluate right ventricular function in PH patients early by strain imaging.

Objective To investigate the effects of gene transfection with human growth/differentiation factor 5(GDF5)on the growth and difierentiation of bone nlarrow stromal stem cells (BMSCs).Methods GDF5 gene was trans fected into BMSCs by liposome method. Then cell proliferation and cycles were examined by MTT and flow cytometry respectively. Cell morphology was observed under light microscope and electron microscope (EM).GDF5 and Collagen Ⅱ were detected at the level of mRNA and protein by RT-PCR and immunocytochemistry. Alkaline phosphate activity was examined by lead citrate method. Osteocalcin mRNA expression was determined bv RT-PCR. ResulIs GDF5 gene was transfected into BMSCs successfully and the transfected cells still maintained their natural growth and proliferation features. Stable expression of GDF5 gene in BMSCs was obtained. The trans fected ceils had basically the same proliferation ability and cell cycles as the untransfccted ones. After transfection comparatively more polygonal cells could be seen in light microscope, showing irregular arrangement mode. Plenty organells were observed and cell nucleus showed irregular shape under EM. The expressions of Collagen Ⅱ mRNA and protein were positive. But osteocalcin mRNA expression was negative. Conclusion Since BMSCs can be induced by GDF5 to differentiate into chondrogenic cells. GDF5 gene-modified BMSCs may be used as candidate seed cells of cartilage tissue engineering.

Objective To study the sonographic features of fetal lung in normal and preeclampic pregnancies,with follow-up on the occurrence of neonatal respiratory distress syndrome (NRDS),as well as,examine the effects of preeclampsia (PE) on fetal lung maturity (FLM).Methods We collected data from 140 cases during the early pregnancy period (29 to ＜34 weeks),100 cases during the late pregnancy period (34 to 39 weeks),as well as 240 cases of normal pregnancies with the same gestational ages for the contwl group.Data included the parameters of fetal lung maturity measured by ultrasound and the incidence of NRDS postpartum.We analyzed the effects of PE on fetal lung maturity.Results The right fetal lung from the early onset PE group was significantly smaller than that of the normal group.There was no difference in the right lung area between the PE group and the normal group of the same gestational age.Compared with the normal group of the same gestational age,the LHR group had no difference in the early and late PE groups.The acceleration time/ejection time of the main pulmonary artery in the early and late PE group was significantly higher than that of the normal group.There was no difference in the incidence of NRDS among all the groups of the same gestational age.Conclusion PE has no significant effect on fetal lung function or maturation of the pulmonary tissues.Lung maturation may precede the same gestational age without PE.

Objective To describe the clinical characteristics of idiopathic ventricular fibrillation (IVF) with fragmented QRS complex (f-QRS) and J wave in resting electrocardiogram. Methods We reviewed data from 21 case subjects in our hospital who were resuscitated after cardiac arrest due to IVF and assessed the prevalence of f-QRS and J wave in resting electrocardiogram (ECG). All the case subjects were classified among three groups based on the electrocardiographic morphology: group I, both f-QRS and J wave were observed (n = 6), group II, only J wave was observed (n = 9), group III, neither f-QRS nor J wave was observed (n = 6). Population characteristics, history of syncope or sudden cardiac arrest, incidence of ventricular fibrillation (VF), and circumstance of VF were evaluated among the three groups. Results The incidence of index events (syncope, survived cardiac arrest and VF episodes recorded in implantable cardioverter defibrillator (ICD) or pacemakers) was 13.4 ± 5.6 per-year in group I, 10.8 ± 3.9 per-year in group II, and 9.8 ± 4.2 per-year in group III. There were significant differences in incidences among the three groups, the most frequent index events were observed in group I. The hazard ratio for incidence was 3.2 (95%CI, 1.1-7.9; P = 0.01). The history and circumstance of the index events were different among the groups. In group I, all the index events occurred during sleep in early morning. In group II, four subjects suffered VF during strenuous physical activities or agitation state, two during sleep in early morning, three in usual activity. In group III, one subject suffered VF during sleep in early morning, one in agitation state, four in usual activity. Conclusions This study suggests that the IVF patients with the combined appearance of f-QRS and J wave in the resting ECG suffer an increased risk of VF, this subgroup of IVF patients has a unique clinical feature.