Adolescent ; Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Lymphoma, Large B-Cell, Diffuse ; diagnosis ; Male ; Middle Aged ; Young Adult

Objective To investigate the inhibitory effects of a recombinant adenovirus vector ex-pressing human IFN-λ1 ( r-Ad-hIFN-λ1) on the growth of orthotopic gastric cancer and to analyze its possi-ble mechanism in a nude mice model of orthotopic human gastric carcinoma .Methods Orthotopic trans-plantation was performed to establish the nude mice model of orthotopic gastric cancer .Thirty mice were ran-domly divided into three groups including PBS control group , Ad-Lac Z empty vector group and r-Ad-hIFN-λ1 experiment group .The mice in each group were given the corresponding interventions once a week for three times.The sizes of tumor were detected by using B-mode ultrasound at different time points to draw growth curves .The expression of IFN-λ1 at mRNA level in skeletal muscle tissues was analyzed by RT-PCR.Western blot assay and immunohistochemical staining were used to detect IFN-λ1 protein in gastric tumor samples .The apoptosis of cells in paraffin-embedded tumor tissues was detected by TUNEL .The per-centages of natural killer ( NK) cells in spleen tissues were analyzed by flow cytometry .Results Compared with control group and empty vector group , the mice in r-Ad-hIFN-λ1 experiment group showed the smallest tumor size [(331.25±6.00) mm3, (322.92±5.92) mm3 vs (248.39±7.60) mm3; P<0.05].hIFN-λ1 was transfected into skeletal muscle successfully and expressed in gastric cancer tissue .Highly expressed hIFN-λ1 was observed in cytoplasm of tumor cells from experiment group by immunohistochemical staining . The apoptotic index of tumor tissues for experiment group was 0.700±0.059 which was significant different from that of control group (0.271±0.026, P<0.05) and empty vector group (0.333±0.028, P<0.05). The percentage of NK cells in spleens from mice in experiment group [(26.49±1.89)%] was significantly higher than that of control group [(13.94 ±1.31)%, P<0.05)] and empty vector group [(19.12 ±1.69)%, P<0.05)].Conclusion Transfection of r-Ad-hIFN-λ1 and expression of hIFN-λin skeletal muscle could significantly inhibit the growth of gastric cancer by inducing tumor cells ′apoptosis and enhan-cing NK cells.

Objective To investigate the effects of narrow-band ultraviolet B (NB-UVB) on the expression of keratin 17 (K17) in the human keratinocyte cell line HaCaT.Methods Cultured HaCaT cells were irradiated with different doses (0,50,100,200,400 mJ/cm2) of NB-UVB followed by additional culture for 6,12 and 24 hours respectively.To explore the mechanisms underlying the effects of NB-UVB on K17 expression,some HaCaT cells were pretreated with PD98059 (an inhibitor of mitogen-activated protein kinase kinase) followed by UVB radiation and additional culture as described above.Cell counting kit-8 (CCK 8) was used to evaluate the proliferation of,real time PCR to measure the mRNA expressions of K17 in,and Western blot to determine the protein expression of K17,Erk1/2 and phosphorylated Erk1/2 in,HaCaT ceils.Results Both the proliferation of and K17 expression in HaCaT cells were promoted by NB-UVB radiation at low doses (50,100 mJ/cm2),but inhibited by NB-UVB radiation at high doses (200,400 mJ/cm2).Significant differences were observed for the proliferative activity between HaCaT cells irradiated with NB-UVB at 100 or 400 mJ/cm2 and unirradiated HaCaT ceils at 12 and 24 hours (P ＜ 0.01 or 0.05).The phosphorylation of Erk1/2 was upregulated by NB-UVB radiation at 100 mJ/cm2,but downregulated by that at 400 mJ/cm2,and the upregulation induced by low dose NB-UVB could be suppressed by blocking the Erk 1/2 pathway.Conclusion The effects of NB-UVB radiation on K17 expression may be modulated by the Erk 1/2 pathway.

Objective To investigate the distribution and proportion of CD8α+α + T cells in lesions and peripheral blood of patients with psoriasis,and to assess their roles in the pathogenesis of psoriasis.Methods An immunofluorescence assay was performed to observe the distribution of CD8α+α+ T cells in lesions of 5 patients with progressive psoriasis vulgaris and normal skin of 5 healthy human controls.Flow cytometry was conducted to determine the proportion of CD8α+α+ T cells,and to measure the expressions of interferon (IFN)-γ and tumor necrosis factor (TNF)-α in peripheral blood from 10 patients with progressive psoriasis vulgaris and 8 healthy human controls.Statistical analysis was carried out by t test with GraphPad Prism software.Results A massive infiltrate mainly composed of CD8α+α+ T cells but not CD8α+β+ T cells was observed in the upper dermis of lesions from the 5 patients with psoriasis,while there was no infiltrate of CD8α+β+ or CD8α+α+ T cells in the normal skin of 5 healthy human controls.Flow cytometry revealed that the proportion of CD8α+α+ T cells was significantly higher in peripheral blood from 10 patients with psoriasis than in that from 8 healthy human controls (26.47％ ± 12.99％ vs.9.12％ ± 4.80％,t =3.96,P＜ 0.001).Significant differences were also noted between the psoriatic patients and healthy human controls in the percentage of cells secreting IFN-γ (47.36％ ± 19.38％ vs.13.44％ ± 9.21％,t =4.54,P ＜ 0.001) and cells secreting TNF-α (54.14％ ± 21.14％ vs.34.03％ ± 17.22％,t =2.17,P ＜ 0.05) in peripheral blood CD8α+α+ T cells.Conclusions Both the distribution and proportion of CD8α+α+ T cells are increased in lesions and peripheral blood from patients with psoriasis,suggesting that CD8α+α+ T cells may be the main subgroup of CD8+ T cells that contribute to the pathogenesis of psoriasis.

Objective To explore the effects of Ad-hIFN-λ1 recombinant adenovirus on prolifera-tion of gastric adenocarcinoma cell line SGC-7901 and its mechanism .Methods Ad-hIFN-λ1 recombinant adenovirus and empty plasmid Ad-LacZ were respeetively transfated to human gastric adenocarcinoma SGC-7901 cells.The proliferation of transfected cells was detected by MTT assay .IFN-λ1 gene expression at mR-NA and protein levels in the cells were measured by RT-PCR analysis and immunofluorescence assay , re-spectively .Tunel assay and flow cytometry were used to analyze the rate of cell apoptosis .Results The proliferation of gastric adenocarcinoma SGC-7901 cells were significantly inhibited with Ad-hIFN-λ1 inter-vention in accordance with highly expressed IFN-λ1 at mRNA and protein levels , respectively .The apoptosis rate of Ad-hIFN-λ1 transfected cells was markedly higher than that of the empty plasmid Ad-LacZ group and PBS blank control group .Conclusion The expression of hIFN-λ1 could be detected after transfection of Ad-hIFN-λ1 recombinant adenovirus into gastric adenocarcinoma SGC-7901 cells.Ad-hIFN-λ1 could signifi-cantly inhibit the proliferation of gastric adenocarcinoma SGC-7901 cells by promoting the apoptosis of cancer cells.

Flexible matching has recently been proposed as a method of improving interactions efficiency. In this study, the concept of flexible matching has been introduced, and the applicability of this strategy has also been described based on the power calculation of interaction between HER-2 polymorphism and smoking with breast cancer. A large-sample approximation method is used to estimate the power and efficiency of gene-environment interactions. In the basic scenario, power of interaction between HER-2 polymorphism and smoking of unmatched case-control study appears to be 30% while in the frequency matching case-control study it is 56%. However, when increasing the smoking prevalence in controls, greater power can be obtained (power=74%). Conclusions: Flexible matching strategies can increase the power and efficiency of case-control studies to detect and estimate the gene-environment interactions when compared with traditional frequency matching and it is especially useful under those scenarios when low environmental exposure of population, adverse gene-environment interactions or less paired controls are seen. Optimal matching design should be made available by weighing the benefits and loss due to flexible matching.

Objective Imatinib mesylate (IM) is the most active agent in treating chronic myeloid leukemia (CML). 5-Aza-2-deoxycytidine (DAC) is a cytosine analogue that inhibits DNA methylation and the activity in myeloid leukemia. Therefore,we investigated combining these two drugs in human leukemia cell line K562. Methods The effects of IM and DAC was examined in K562 cells including cell viability using MTT method,cell cycle phase and cell death using flow cytometric (FCM),and the expression of bcr-abl mRNA by RT-PCR. Results Both DAC and IM resulted in time and concentration-dependent induction of cell death. DAC and IM in combination produced a greater inhibition of growth against K562 cells (F =43.947,165.580,321.193,296.101,P<0.05). The main effect and interaction between two drugs was statistically significant (F = 202.759,168.457,417.538,P <0.001) after 24 h,48 h,72 h and a greater reduction in expression of bcr-abl mRNA than either agent alone. The difference was statistically significant (F =71.981,P <0.05). The number of G1 phase cells were increased significantly when induced by single agent. 48 h incubation with IM 0.2 μmol/L alone or combined with DAC 4 μmol/L showed 6.7 %,8.4 % pre-apoptosis cells,respectively. After incubation for 48 h with DAC 4 μmol/L,the expression of mRNA were decreased by 14 %,IM 0.2 μmol/L showed 40 % reduction,and combination group were significantly depressed for the mRNA expression by 60 %. Conclusion The combination of DAC and IM showed synergistic effects on cell death in K562 cells. These data suggested that DAC used in combination with IM has clinical potential in the treatment of chronic myeloid leukemia.

This article introduces a novel scavenger for waste anesthetic gas which makes use of negative pressure in operating room. This setting can scavenge the exhaust gas absolutely without affection the normal work of anaesthesia.
Anesthetics ; Gas Scavengers ; Operating Rooms

Objective To explore the diagnostic value of two-dimensional speckle tracking technology in the evaluation of right ventricular systolic function in patients with pulmonary disease .Methods Thirty patients with pulmonary heart disease were divided into two groups:group of compensated pulmonary heart disease(compensated group ) (n =15),group of decompensated pulmonary heart disease (decompensated group)( n =15).30 healthy subjects were enrolled in control group .The displacement of the tricuspid annulus at the midpoint(TADmid),the displacement of the tricuspid annulus at the free wall (TADfre) and the displacement of the tricuspid annulus at the septum (TADsep) were acquired,and simultaneous real-time three-dimensional ultrasound detection of right ventricular ejection fraction (RVEF) were taken.The correlation of TADmid with RVEF and pulmonary artery systolic pressure ( PASP) were analyzed.Results TADmid of the healthy control group,the compensated group and the decompensated group were(17.1 ±3.9)mm, (13.6 ±2.6)mm,and(9.5 ±3.2)mm respectively.TADfre were(21.1 ±3.0)mm,(17.6 ±4.2)mm,and (11.5 ±3.8) mm respectively.TADsep were(12.0 ±2.5) mm,(9.7 ±3.3) mm,and(7.4 ±2.7) mm respectively.RVEF were(56.3 ±8.2)%,(39.6 ±6.4)%,and(28.1 ±5.9)% respectively.PASP were (20.6 ±2.6) mm Hg (1 mm Hg =0.133 kPa), (63.3 ±5.6) mm Hg, and (82.5 ±11.2)mm Hg respectively.There were significant differences of TADmid , RVEF, and PASP among the 3 groups ( F =8.581,7.816,9.300,6.507,10.235, all P <0.05).TADfre, TADmid, TADsep and RVEF were all decreased in the compensated group comparing to the healthy control group ,while PASP was increased.The decrease of TADmid was the most significant ,while that of TADfre was the slightest .There were significant differences of TADfre,TADmid,TADsep,RVEF and PASP between the 2 groups(t=2.703,2.536,2.379, 2.817,3.026,all P<0.05).TADfre,TADmid,TADsep and RVEF of decompensated group reduced more significantly than the compensated group , while PASP was increased significantly .There were significant differences of TADfre,TADmid,TADsep,RVEF and PASP between the 2 groups(t=2.519,2.493,2.236, 2.621,2.985,all P<0.05);TADfre and TADmid were decreased more apparently in decompensated group than that in compensated group ,and so were TADsep and RVEF,while PASP were increased.There were significant differences of TADfre,TADmid,TADsep,RVEF and PASP between the 2 groups (t =1.947, 2.680,2.016,2.653,2.893,all P<0.05).There was significant positive correlation between TADmid and RVEF measured by real-time three-dimensional ultrasound (r =0.904,P <0.01 ).There was significant negative correlation between TADmid and PASP (r=-0.686,P<0.01).The cut-off point value of TADmid measured by speckle tracking technology for evaluation of RVEF <45% and<30% were 13.65 mm and 9.80 mm,respectively.The sensitivity were 94.4%and 90.0%respectively,and the specificity were 78.6%and 90.0%respectively.Conclusions TADmid is hardly affected by the external factors ,and it can better reflect the changes of right ventricular systolic function for patients with pulmonary heart disease .TADmid is positively correlated with RVEF measured by real-time three-dimensional ultrasound and negatively correlated with PASP.Further more,the correlations is significant.The three parameters can authenticate mutually ,and the combination of them can evaluate the right ventricular systolic function in patients with pulmonary heart disease precisely.

Objective To study the imaging apperances and the diagnostic value of conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) in differentiating histopathological types of small hepatocellular carcinoma (sHCC).Methods 40 sHCC confirmed by histopathology were classified into 4 groups according to their degree of differentiation:well (n=6),well-moderate (n=5),moderate (n=27) and moderate-poor (n =2).All patients received conventional MRI and DWI (1.5T,b =0 and 600 s/mm2) before the operation.The ADC values of the sHCC were measured and compared.Results On T1WI,32 lesions showed hypointensity,4 hyperintensity (well) and 4 isointensity (well-moderate =2,moderate =2).On T2WI,hyperintensity was observed in 39 lesions and isointensity in 1 lesion (well).Steatosis in the sHCC was seen in 17 of 40lesions (17/40,42.5 ％,well=4,well-moderate=1 and moderate=12).A pseudocapsule was seen in 67.5 ％ sHCC (27/40,well=4,well-moderate=3,moderate=18 and moderate-poor=2).32 lesions showed hypervascularity on arterial phase,and 8 lesions showed hypovascularity (well=3,moderate =4,moderate-poor=1).On DWI,37 lesions showed hyperintensity,except for 3 lesions with welldifferentiated sHCC which showed isointensity (50％,3/6).The mean ADC values±S.D.of sHCC in the well,well-moderate,moderate and moderate-poor groups were (1.757 ± 0.337) × 10-3,(1.917±0.574)×103,(1.816±0.545)×103 and (1.723±0.217)×10-3,respectively.There were no significant differences among the 4 groups.Conclusion The imaging appearances of wellmoderate,moderate and moderate-poor sHCC on conventional MRI were classical which make diagnosis easy.Hyperintensity on DWI contributed to diagnosis.However,the imaging appearances of some well-differentiated sHCC were atypical.The lesions could be isointensity or hyperintensity on DWI.The combination of conventional MRI and DWI contributed to better diagnosis of sHCC,especial for atypical sHCC.