Objective To investigate the effect of pioglitazone on oxazolone-induced colitis and to clarify the mechanism of apoptosis by Fas/Fas ligand(FasL). Methods Eighteen BALb/c mice of ulcerative colitis induced by oxazolone enema were equally allocated into 3 groups. The mice in group 1 were sacrificed 3 days after enema,lamina propria mononuclear cells(LPMC) were isolated from freshly obtained colonic specimens and treated in vitro with pioglitazone (40 ?mol/L),the annexin-V-FITC was used for detection of apoptosis,and Fas/FasL expression was assayed by flow cytometry. Meanwhile,untreated mice were served as normal controls. Mice in group 2 (control group) and 3 (experiment group) were treated with methylcellulose or pioglitazone(20 mg?kg -1 ?d -1 ) 3 days after enema and were administrated for consecutive 7 days. The colonic inflammation including disease activity index (DAI),macroscopic and histological changes,myeloperoxidase(MPO) activity and levels of interleukin (IL)-4,IL-5 were evaluated. Results Apoptosis of LPMC,expression of Fas and FasL in normal and colitis mucosa were 12.89?1.23,70.63?6.24,8.59?5.47 and 4.25?0.84,62.60?5.85,23.75?10.23,respectively. After treated with pioglitazone,both apoptosis of LPMC and expression of Fas increased,while FasL expression decreased (40.58?10.32,83.98?11.38 and 10.04?5.21 respectively). In group 2 and group 3,the macroscopic and microscopic score,MPO activity,IL-4 and IL-5 level were 2.50?0.55,8.83?0.75, 3.81?0.17,216.46?34.32,102.28?25.74 and 0.33 ?0.52,4.00?0.63,1.25?0.16,179.36?18.15,61.65?17.45,respectively. Conclusion The results indicate that pioglitazone treatment can significantly attenuate colonic inflammation,and it might be related to the apoptosis of LPMC through Fas and FasL.

Objective To investigate the effect of alteration of CRELD1 gene expression on the related genes in the endocardial cushion development.Methods Over-expression and silence of CRELD1 gene were realized by the construction of lentiviral vector.Afterwards,the lentiviral vectors were used to infect the human fetal lung fibroblasts (HFL)-I.All of the cells were divided into the following 5 groups:the blank control group,the negative control group of interference,the interference group,the negative control group of over-expression,and the over-expression group.Western blot and real-time fluorescent quantitative polymerase chain reaction were applied to examine the mRNA and protein expression of CRELD1,Sox9,Aggrecan,Scleraxis and Tenascin-C.Results The DNA sequences of 2 recombinant plasmids pLV3-shRNA-CRELD1 and pLV4-CRELD1 matched very well with those which were designed according to the DNA sequence analysis.HFL-I was successfully infected with lentiviral vectors and displayed fluorescent green light under inverted fluorescence microscope.The results of real-time PCR detection and Western blot test were consistent:expressions of Sox9 and Aggrecan in the interference group were significantly higher than those in the negative control group of interference,while the expressions of the 2 genes in the over-expression group were significantly lower than those in the negative control group of over-expression.Expressions of Scleraxis increased in both the interference group and the over-expression group when compared with the negative control groups respectively.Compared to the corresponding negative control groups,Tenascin-C expression decreased markedly in the interference group,whereas it increased significantly in over-expression group.Conclusions CRELD1 gene has negative effect on the expression of the related genes Sox9 and Aggrecan in the endocardial cushion development,whereas it has positive effect on the Tenascin-C expression.It serves as a theoretical framework to illustrate the effect of CRELD1 gene on the atrioventricular septal defect.

Objective To investigate the clinical value and the expression of OX40/OX40L from lymphocytes of patients with Graves' disease (GD) before and after 131I therapy.Methods The expression of OX40/OX40L on T,B lymphocytes and the percentage of lymphocyte subsets were analyzed using immunofluorescence staining and flow cytometry in 32 patients with GD before and after 131I therapy.Twenty-five healthy subjects were considered as the control group.The data between GD patients and controls were compared with two-sample t test.The correlation between the expression of OX40/OX40L and the function of thyroid (FT3,FT4 and TRAb level) was performed with linear correlation analysis.Results Compared with the healthy subjects,the percentage of CD4+ T cells and ratio of CD4+/CD8+ were decreased ((34.36 ±6.73)％ vs (45.60-±5.72)％,t=2.634; 1.24±0.26 vs 1.84±0.37,t=2.125,both P＜0.05).Whereas the percentage of CD19+ B cells in patients with GD were significantly higher than that in healthy subjects ((21.42 ±3.92)％ vs (15.35 ± 3.15)％,t =2.653,P ＜0.05).The expression of OX40 increased in CD4+ T lymphocytes ((12.92 ± 2.26) ％) and OX40L expression was up-regulated in CD19+ B lymphocytes ((15.33 ± 3.75)％) of patients with GD,compared with the healthy subjects ((4.19 ±1.45) ％ and (8.64 ± 1.73) ％,respectively,t =2.112 and 2.467,both P ＜ 0.05).The expression of OX40 in CD4+ T lymphocytes ((7.65 ± 1.64) ％) and OX40L in CD19+ B lymphocytes ((11.50 ±2.72)％) were increased after 131I therapy(t =2.795,2.393,both P ＜0.05).The thyroid functions of 32 GD patients were improved.The levels of FT3,FT4 and TRAb decreased significantly after 131I treatment (from 20.79 ±6.05 to 4.53 ± 2.54,from 49.65 ± 10.12 to 13.69 ± 4.35,and from 24.78 ± 8.46 to 11.74 ±6.19,respectively; t =2.219,2.441 and 2.293,all P＜0.05).The levels of FT3 and FT4 were positively correlated with the percentage of OX40 expression in CD4+ T lymphocytes (r =0.65 and 0.73,both P ＜ 0.05).TRAb was positively correlated with CD19+ OX40L + B lymphocytes (r =0.76,P ＜ 0.05).Conclusions OX40/OX40L may play an important role in the activation of lymphocytes,the production of antibodies,and participate in the pathogenesis and progression of GD.131I therapy not only damages most of the thyroid follicular epithelial cells by its β ray,but also facilitates GD improvement by regulating T and B lymphocyte functions.

Adolescent ; Child ; Child, Preschool ; Cytomegalovirus ; Cytomegalovirus Infections ; prevention & control ; Female ; Hematopoietic Stem Cell Transplantation ; Humans ; Infant ; Male

OBJECTIVETo establish a rapid determination method with gas chromatography-mass spectrometer (GC-MS) for thiodiglycolic acid (TDGA), a vinyl chloride (VCM) biomarker.

METHODSA high- sensitivity determination method was established using a moderate methyl esterification instead of methyl esterification of highly toxic diazo reaction.

RESULTSThe standard curve regression linear equation of the method was: y=8460.5x-4758.2, the linear coefficient was 0.999 7, the minimum quantity concentration was 2.0 µg/L, the range of precision value was 0.81%-2.38%, and the average recovery of standard addition was 99.0%-102.9%.

CONCLUSIONThis method reduces the risk of traditional methyl esterification, improves the determination sensitivity compared with the GC-FPD method, and meets the determination requirement of TDGA.

Objectives To investigate the mutational characteristics of MSX1 and PAX9 genes in a family affected by non-syndromic oligodonti so as to study the pathogenesis of oligodontia from a molecular prospective. Methods A family with oligodontia, but of different descent and unrelated healthy controls were enrolled in our study. Genomic DNA was isolated from the blood samples. Mutation analyses were performed by amplifying MSX1 and PAX9 exons and sequencing the products. Results DNA sequencing revealed a novel missense mutation c.348C>T in a highly conserved homeobox sequence of MSX1 and a known polymorphisms c. 469+35- c.469+45del in exon 1 and in intron in the two patients and in two unrelated healthy controls. But we did not detect any mutation in PAX9. Conclusion Our finding suggests the samesense mutation (c.348C>T) and the polymorphisms (c.469+35- c.469+45del) may be responsible for oligodontia phenotype in this Chinese family.

Streptomyces sp.X-435 isolated from a soil sample collected in the suburbs of Beijing was proved to be a produce Virginiamycin.To improve the productivity of the Virginiamycin of Streptomyces sp.X-435,the spores of strain X-435 were treated with UV.The three types of colony,strawhat,wrinkled,blad,were isolated on Gaose's medium plates after mutation.Among them,the colonies of strawhat type exhibited positive mutation and were picked up as objects of screening.After five generation of mutation,the mutant F5-25-u-28 was selected which potency of Virginiamycin was about 20times higher than that of the beginning strain by flask fermentation and was also genetic stable.

Objective To evaluate the safety,biocompatibility and efficacy of transcatheter closure of atrial septal defect(ASD)with no stainless-steel-screw occluder in canine model.Methods The device was constructed from superelastic Nitinol wires tightly woven into two flat disks and sewed with polyester fibers inside,with a pliable loop on the right-atrial-disk of the device,connecting to the delivery cable.ASD was created by transcatheter puncture and balloon dilatation and then closed by occluder under fluoroscopy in the catheterization laboratory.The location and the influence of the implanted device on function of tricuspid valve and mitral valve were evaluated by echocardiography.At 1,2,3 and 6 months after the operation,the animals were killed and autopsy was conducted.Results Eight dogs with puncture-produced ASD underwent ASD closing procedure successfully.The occluder showed no influence on the function of MV and AV demonstrated by echocardiogram.The two disks of the implanted device were covered with a smooth intact neogenesis layer in all dogs.Endocardial cells fully covered the surface of the two disk without inflammating reaction 3 months later. There was no evidence of corrosion on the surface of the nitinol wire removed from the dog after 6 months.Light microscopic examination of the liver,kidney,lung and spleen showed no evidence of embolization and inflammation.Conclusion Transcatheter ASD occlusion with new-type occluder is safe,feasible,effective and good biocompatibility with a good prospective clinical application.

Objective:To investigate the effect of enteral nutrition support by CT-guided percutaneous gastrostomyon the nutritional status of patients with esophageal cancer complicated with dysphagia during radiotherapy.Methods:Therewere46 cases of esophageal cancer patients with dysphagia treated with CT-guided percutaneousgastrostomy.Others 43 cases of esophageal cancer by oral feeding in patients with dysphagia as control groupduringthe sametimein our hospital radiotherapy center.Patients in the observation group were ingested daily through the gastrostomy,and the nutritional intake of the control group included oral ingestion and intravenous infusion.All patients were measuredthe body height,body weight (BW).body mass index (BMI),Serum levels of serum albumin (ALB),pre-albumin (PA) and hemoglobin (HB) before and after radiotherapy.We also observed the incidence of acute radiation esophagitis and the completion of the treatment plan during radiotherapy in both groups,and to observe the two groups of patients the incidence rate of radiotherapy and treatment plan during the completion of acute radiation esophagitis.Results:There was no significant difference in BW,BMI,ALB,PA,HB before radiotherapy between the two groups (t =0.84,0.63,-1.07,-0.81,1.48,P ＞ 0.05).The BW,BMI,ALB,PA and HB of the observation group were significantly higher than those of the control group at the end of radiotherapy,which werestatistically significant (t=3.30,4.65,6.82,43.56,31.91,P ＜ 0.01).During the radiotherapy,the total incidence of acute radiation esophagitis in the observation group was significantly lower than that in the control group,(x2=3.971,P＜ 0.05).In addition,the completion rate of the observationgroup was significantly higher than that of the control group (x2 =6.811,P ＜ 0.01).Conclusion:To the Patients with dysphagia of esophageal cancer,enteral nutrition byCT guided percutaneous gastrostomy,can improve the malnutrition,the immune function of the patients and reduce the acute radiation esophagitis during radiotherapy and ensure the successful completion of the treatment plan.

Objective: To explore influence of coping style on sleep quality and blood pressure in community male population with high normal value blood pressure. Methods: The Pittsburgh sleep quality index (PSQI) and coping style questionnaire (CSQ) were used to assess 120 men with high normal blood pressure in community. With PSQI>7 scores as criterion for judging sleep quality disorders, the subjects were divided into sleep disorder group (n=51) and normal sleep group (n=69), and sleep disorder group received psychological intervention. Results: Sleep disorders existed in 42.5% male population with high normal blood pressure. Compared with normal sleep group, there was significant increase in PSQI [（6.43±2.59）scores vs. (8.33±3.14）scores] and diastolic blood pressure [(81.00±8.91) mmHg vs. (88.00±5.69) mmHg] and significant decrease in factor scores of “problem solving” [(0.76±0.21) scores vs. (0.61±0.18) scores] and “asking for help” [(0.52±0.26) scores vs. (0.41±0.11) scores] in sleep disorder group, P<0.05 all; Compared with before intervention there were significant increase in scores of “problem solving” [(0.61±0.18) scores vs. (0.71±0.12) scores]and “asking for help” [(0.41±0.11) scores vs. ( 0.51±0.13) scores]and significant decrease in PSQI score [(8.33±3.14) scores vs. (7.41±2.37) scores] and diastolic blood pressure [(88±5.69)mmHg vs. (80± 4.17)mmHg] after psychological intervention 12 weeks in sleep disorder group, P<0.05 all. Conclusion: Psychological intervention may improve sleep quality and reduce blood pressure in community male population with high normal value blood pressure.