ObjectiveTo investigate the effects of X-linked inhibitor of apoptosis (XIAP) siRNA or XIAP antagonist Embelin on the growth inhibition and apoptosis of hepatcellular cancer cell line HepG2,which was treated by tumor necrosis factor-related apoptosis (TRAIL). Methods HepG2 cells were tranfected either by XIAP siRNA or a negative control,followed by treatment with TRAIL,Embelin or a combination of the two.XIAP expression,cell growth,and caspase-3 activity were determined by Western blot,MTT assay and fluorescent caspase-3 assay,respectively.Cleaved PARP expression levels of were measured by Western blot.ResultsThe XIAP protein expression was significantly downregulated by transfection with XIAP siRNA.Compared with the negative control,the XIAP siRNA significantly inhibited the growth of HepG2 cells treated by 100ng/ml(6.8％ ±1.2％ vs.11.8％±4.0％,P＜0.05)and 1000 ng/ml (18.9％ ±2.0％ vs.26.6％ ±1.5％,P＜0.01)by TRAIL.TRAIL-induced caspase-3 activation and PARP cleavage were also increased significantly by XIAP siRNA transfection.In addition,Embelin also significantly inhibited cell growth (P＜0.01),activation of caspase-3 (P＜ 0.01) and TRAIL-induced PARP cleavage.Conclusions Both XIAP siRNA and Embelin may potentially contribute to clinical treatment of hepatocellular carcinoma.

It is very difficult for stroke patients to complete the action of squatting-standing because their equilibrium function ability has been seriously declined. It was necessary, therefore, to do a deep research on the action of human squatting-standing and to set up an accurate model and simulation. In our modeling research, the movements of upper limbs and head was neglected, and a seven-segment model was developed to establish the coordinate system of human squatting-standing action. It calculated the knee joint moment and hip joint moment during squatting and standing by utilizing Lagrange method, and then simulated this mathematical model by utilizing Matlab. Geometric model of human squatting-standing was developed and simulated in ADAMS which proved that the established Lagrange model was reasonable. It would also provide significant theoretical references for further study and development of squatting-standing rehabilitation training equipment.
Biomechanical Phenomena ; Computer Simulation ; Hip Joint ; Humans ; Knee Joint ; Models, Theoretical ; Movement ; Posture ; Upper Extremity

Objective To observe the therapeutic efficacy of endoscopic pancreaticobiliary duct drainage for acute necrotizing pancreatitis. Methods 41 cases of acute necrotizi ng pancreatitis were randomly divided into pancreaticobiliary duct drainage (21 causes) group and control group (20 cases).Results The procedure was successful in all 21 cases. The difference bet ween the two groups was statistically significant including hospital stay 〔(2 8?12) days vs. (37?19) days,P

Objective To study the serum level of resistin and IL‐6 in the sepsis‐induced acute lung injury (ALI) in rats and to probe the relation of IL‐6 and resistin to ALI and its possible mechanism .Methods The forty‐five Wistar rats were randomly as‐signed to three groups ,a control group ,a sham group and a model group .ALI was induced by intravenous injective of LPS (10 mg/kg) and those animals were killed after 6 hours ,12 hours ,24 hours .The lung wet/dry weight ratio ,serum IL‐6 was detected by chemiluminescence and resistin levels were detected by ELISA .Results Compared with the control group and the sham group ,the lung wet/dry weight ratio ,lung pathologic tissue score ,the serum level of resistin and IL‐6 were increased(P<0 .05) .Positive cor‐relation was observed between resistin and IL‐6 in different time .Conclusion Resistin possibly participate the process of sepsis in‐duces ALI .

Objective To evaluate the effect of intrathecal resveratrol on activation of Ca2+/ calmodulin-dependent protein kinase Ⅱ (CaMK Ⅱ) in spinal dorsal horn neurons of rats with bone cancer pain.Methods Thirty-two adult female Sprague-Dawley rats,weighing 180-220 g,were equally randomized into 4 groups using a random number table:sham operation group (group S),bone cancer pain group (B group),and bone cancer pain + solvent control group (BD group).Walker 256 mammary gland cancer cell suspension (4× 105 cells/ml) 5 μl was injected into the medullary cavity of the right tibia in B,BR and BD groups.Normal saline 5 μl was given in group S.On 12,13 and 14 days after injection of mammary gland cancer cells,resveratrol 200 μg/10 μl was injected intrathecally once a day in group BR,and 1％ dimethyl sulfoxide 10 μl was intrathecally injected once a day in group BD.Before injection of mammary gland cancer cells (T0) and on 3,5,7,10,12 and 14 days after injection of mammary gland cancer cells (T1-6),mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured.The rats were then sacrificed and L4,5 segments of the spinal cord were removed for confirmation of the location of phosphorylated CaMK Ⅱ (p-CaMK Ⅱ) in spinal dorsal horn neurons (by immunofluorescence) and for detection of p-CaMK lⅡ expression (using Western blot).Results Compared with group S,MWT and TWL were significantly decreased at T2-6,and p-CaMK Ⅱ expression was upregulated at T6,and p-CaMK Ⅱ was mainly co-expressed with neurons in B,BR and BD groups.Compared with group B,MWT and TWL were significantly increased at T5,6,and p-CaMK Ⅱ expression was down-regulated at T6 in group BR.There was no significant difference in MWT,TWL,and p-CaMK Ⅱ expression at each time point between group B and group BD.Conclusion Resveratrol can alleviate hyperalgesia in rats with bone cancer pain and inhibited activation of CaMK Ⅱ in spinal dorsal horn neurons may be involved in the mechanism.

Aim To isolate cancer stem cells from human pan-creatic cancer cell line L3. 6pl and to identify their biological characteristics. Methods L3. 6pl cells were cultivated in com-mercial low adhesion plate with serum-free stem cell culture me-dium ( MEM/F12 1:1 ) supplemented with B27. The cancer stem cells reformed into floating spheres were isolated. The method of tumor sphere formation was used to isolate/enrich and characterize the cancer stem cells in pancreatic carcinoma cell line L3. 6pl. Cancer stem cell spheres were collected and sorted using magnetic cell sorting ( magnetic activated cell sorting, MACS) technology, with the cell surface markers of CD24 +CD44 + ESA+. Self-renewal and EMT-related oncogene expres-sion were measured with Western blot. Cancer stem cells differ-entiation potential and the expression of cancer stem cell related signs were checked with Immunofluorescence assay. To deter-mine tumorigenesis in vivo, Xenograft assay in NOD-SCID mice were performed respectively, then immunohistochemistry proto-oncogene c-Met and RON expression were also checked. West-ern blot was used to detect the changes of stemness relative tran-scriptional factors and epithelial markers expressed in spheres before and after differentiation. Drug resistance of pancreatic cancer stem cells to gemcitabine or paclitaxel was measured with MTT assay. Results CD24 + CD44 + ESA+ cells were signifi-cantly tumorigenic, and cultured in serum-free conditions to form spheroids, which had the characteristics of stem cells with self-renewal, EMT and drug-resistant capabilities, and had a posi-tive correlation with the c-Met, RON protein expression. Con-clusion Human pancreatic stem cells are successfully isolated, which provides a useful model for individualized therapy and e-valuation of the therapeutic efficacy for pancreatic cancer pa-tients.

ObjectiveTo investigate the effects of Saposhnikovia divaricata extract combined with arsenic trioxide (ATO) on the proliferation and apoptosis in chronic myelogenous leukemia K562 cells. MethodsSaposhnikovia divaricata extract was prepared.Cultured K562 cells were treated with different concentration of Saposhnikovia divaricataextract or/and ATO for 48h. Cell proliferation was determined using the MTT assay. Apoptosis and cell cycle were detected using flow cytometry.ResultsThe MTT assay showed that Saposhnikovia divaricata extract of 750,1 000,1 250,1 500 μg/ml had a significantly proliferation inhibitory effect compared with control group, the inhibitory rates were 23.29% ± 3.31%, 48.30% ± 2.50%, 79.62% ± 3.41% and 88.94% ± 0.06%, respectively (allP<0.05); Saposhnikovia divaricata extract of 500 μg/ml combined with ATO of 1.0, 0.5 μg/ml significantly increased inhibitor rates compared with ATO of 1.0, 0.5 μg/ml (64.99% ± 5.18%vs. 44.48% ± 3.31%,38.59% ± 3.88%vs.26.30% ± 5.03%; allP<0.05). FCM showed that Saposhnikovia divaricata extract of 500 μg/ml combined with ATO of 2.0, 1.0, 0.5 μg/ml significantly increased apoptotic rate compared with ATO group of 2.0, 1.0, 0.5 μg/ml (33.97% ± 0.59%vs.20.97% ± 2.17%, 13.53% ± 0.47%vs.9.77%±0.64%、6.63%±&0.40%vs.4.00%±0.46%; allP<0.05 ). Cell cycle results showed that Saposhnikovia divaricata extract of 500μg/ml combined with ATO of 2.0,1.0, 0.5μg/ml significantly increased the rate of S phase compared with ATO group of 2.0, 1.0, 0.5 μg/ml (60.25 ± 2.59%vs.55.61 ± 1.28%, 60.89 ± 1.53%vs.37.96 ± 1.02%, 47.76 ± 0.87%vs.39.90 ± 0.92%; allP<0.05).ConclusionsSaposhnikovia divaricataextract could obviously inhibit the proliferation of K562 cells and enhance the apoptotic effect of ATO. ATO could induce a G2/M phase arrest, while Saposhnikovia divaricata extract combined with ATO could induce a S phase arrest in K562 cells.

Objective:To investigate the ethical significance of the extracorporeal circulation membrane oxy-genation ( ECMO) in the donation organ transplantation .Methods: Analyzing the data of ECMO protected to the organ in 13 donors after brain death , Accounting the rising costs which caused by ECMO and make the interview to the patients and family members .Results:In the period of ECMO flow , the hemodynamic of the DBD donors be-come stable gradually , the medications reduced significantly or stop , the function of organs was restored .There were 38 organs can be used for the transplantation which were proven by the pathological biopsy .Twenty six kid-neys were transplanted to 26 recipients and liver transplantation was performed in 12 recipients.All transplantations were successfully completed .Medical cost of this patients increase 5.3%, all of the family members and patients can accept the intervention of ECMO .Conclusion:ECMO is an effective method to protect and improve the utili-zation rate of the organ .the improvement of the related technical standards , legal, laws and ethics of staff will pro-mote to the development of organ transplantation .

ABSTRACT:Objective To observe whether N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP)can inhibit rat silicotic fibrosis by regulating stimulatory G proteinα(Gαs)/inhibitory G proteinα(Gαi)signal.Methods Male Wistar rats were randomly divided into three groups (n=1 0 ):control 1 6-w group,silicosis 1 6-w group,and Ac-SDKP pre-treatment group.The pathological changes of the lung tissue was observed by HE staining;the expressions ofα-smooth muscle actin (α-SMA),Collagen Ⅰ,fibronectin (Fn),Gαs,Gαi2 ,Gαi3 and cAMP were detected by Western blot.Immunofluorescence was performed on lung tissue sections to detect the coexpression ofα-SMA/Gαi3 . Results Within silicosis 16-w group,HE staining showed that the silicotic nodule volume increased,nodule fusion and the formation of interstitial fibrosis could be seen,and cell fibrous nodules were visible.Immunofluorescence staining showed the enhanced coexpression ofα-SMA/Gαi3 in fibrosis area.Compared with those in control group, the expressions ofα-SMA,Collagen Ⅰ,Fn,Gαi2 and Gαi3 significantly increased in silicosis 1 6-w group,but the expressions of Gαs and cAMP decreased.Compared with silicosis 1 6-w group,Ac-SDKP pre-treatment group had alleviated lung injury and decreased coexpression ofα-SMA/Gαi3 .The expressions ofα-SMA,Collagen Ⅰ,Fn,Gαi2 and Gαi3 protein significantly decreased in Ac-SDKP pre-treatment group,while the expressions of Gαs and cAMP increased obviously.Conclusion Ac-SDKP can regulate the expressions of Gαs and Gαi and promote the formation of cAMP,thus playing an effective role against silicotic fibrosis.

Objective To investigate the significances of monitoring urine neutrophil gelatinase -associated apolipoprotein (NGAL)and kidney injury molecule -1 (KIM-1)levels before and after coronary intervention in early predication of contrast -induced nephropathy.Methods The clinical data of 249 patients with coronary heart disease undergoing percutaneous coronary intervention were collected.All patients were divided into contrast -induced nephropathy group(n =21 )and non -contrast -induced nephropathy group(n =228)according to whether had contrast -induced nephropathy.Before surgery and 4h,12h,24h,48h,72h after surgery,the levels of serum creatinine were tested.Before surgery and 4h,12h,24h,48h after surgery,the levels of urinary NGAL and KIM-1 were detected by using enzyme -linked immunosorbent assay(ELISA).Results Compared with before surgery,the serum creati-nine level of contrast -induced nephropathy patients after surgery 48h[(101.7 ±20.3)μmol/L]was elevated,the difference was statistically significant(t =15.972,P <0.05).Compared with before surgery,the urinary NGAL levels of contrast -induced nephropathy patients after surgery 4h ~48h were (12.3 ±1.6)μg/L,(14.5 ±1.5 )μg/L, (14.1 ±1.2)μg/L and (14.3 ±1.4)μg/L,which were significantly elevated(t =8.672,11.817,15.942 and 17.641,all P <0.05),and the urinary KIM-1 levels after surgery 24h and 48h were (5.1 ±0.9)μg/L and (5.5 ± 1.3)μg/L,which were elevated,the differences were statistically significant(t =9.672,14.381,all P <0.05).The urinary NGAL levels of contrast -induced nephropathy patients after surgery 4h ~48h were higher than non -contrast-induced nephropathy patients,and the urinary KIM-1 levels after surgery 24h and 48h were higher than non -contrast -induced nephropathy patients,the differences were statistically significant(t =17.838,19.370,13.996, 18.172,2.792,3.307,all P <0.05).Pearson correlation analysis showed that the urinary NGAL levels after 4h and urinary KIM-1 levels after 24h were positively correlated with serum creatinine levels after surgery 48h(r =0.698, 0.576,all P <0.05).ROC curve analysis showed that urinary NGAL levels in predicting contrast -induced nephrop-athy,the area under the curve was 0.963 (95% CI:0.931 ~0.995 ),sensitivity was 85.7%,and specificity was 94.3%,for urinary KIM-1 levels,those were 0.839 (95%CI:0.768 ~0.909),81.0% and 72.8%.Conclusion The urinary NGAL levels of contrast -induced nephropathy patients after interventional treatment 4h were increased, and the urinary KIM-1 levels appeared increased after surgery 24h,which were earlier than serum creatinine.They were expected to be early indicators for determining acute kidney injury and predicting contrast -induced nephropathy after intervention treatment.