Dental Restoration, Permanent ; Humans ; Metal Ceramic Alloys ; adverse effects ; Nickel ; adverse effects

Objective To study the expression of PTEN,Fas and DCR3 in human gastric cancer and evaluate their effects on carcinogenesis,cell proliferation,invasion and metastasis of gastric carcinoma,as well as clinical significance.Methods The expression of PTEN,Fas and DCR3 were detected by immunohistochemical method (streptavidin-peroxidase) in the tissues of 75 primary gastric carcinomas and 15 gastric ulcers.Results The positive expression rate of DCR3 in gastric carcinoma tissues was significantly higher than that in normal tissues,and the expression of PTEN and Fas was obviously lower than that in normal tissues (P<0.01).The expression of DCR3 was negatively correlated with Fas and PTEN respectively (r=-0.720,P<0.001; r=-0.336,P<0.001).There was a positive correlation between PTEN and Fas.The expression of PTEN,Fas and DCR3 was closely correlated with lymph node metastasis,clinical stage,histological differentiation grade and tumor depth of gastric cancer,but not related to sex,age and tumor size (P>0.05).Conclusion PTEN,DCR3 and Fas have mutual restrictive relationships in the process of invasion and metastasis in gastric cancer.Detecting the expression of PTEN,Fas and DCR3 in gastric cancer is helpful to judge the malignant biological behavior of gastric cancer at a different angle,which may be considered as reliability index in clinic diagnosis,judging curative effect and monitoring the prognosis of gastric carcinoma.

Objective To investigate the cytogenetic toxic effects of copper sulfate on root tip cells of Zea mays L.Methods The root tip cells of Zea mays L were treated by copper sulfate as mutagen at the doses of 0.05,0.10,0.25,0.50,1.00 g /L for 24 hours.The mitotic index,the micronucleus rate and the chromosome aberration rate of tip cells of Zea mays L were measured.Results Compared with the negative control group,the micronucleus rates and the mitotic index in 0.05,0.10,0.25,0.50,1.00 g /L groups and the chromosome aberration rates in 0.05,0.10,0.25,0.50 g /L groups increased significantly(P

Objective: To study the prevalence of antibody to citrullinated human fibrinogen(ACF) in rheumatic diseases and the diagnostic values in rheumatoid arthritis.Methods: Human fibrinogen was deiminated by the peptidylarginine deiminase(PAD) in the presence of Ca~(2+) in vitro.ACF was detected by ELISA in 352 patients with rheumatic diseases(183 RA,121 SLE and 48 OA) and 108 healthy controls.The sensitivity and specificity in RA were calculated and the correlations between ACF and the clinical and laboratory parameters were analysed by SPSS statistical software.Results: Compared with SLE(25.62%),OA(18.75%) and healthy control(2.78%) respectively,the patients with RA had a significantly higher level of ACF(67.21%,P

Background Greater variability in blood pressure and the disappearance of circadian rhythm are frequently found in the very elderly with hypertension.Blood pressure variability may be closely related to the target organ damages.Objective To assess the relationship between nocturnal blood pressure fall(NBPF)and 24 h blood pressure variability(BPV)by using BP weighted standard deviation as a new index for computing 24 h BPV,and to verify the clinical value of this new marker in the very elderly with hypertension.Methods We analysed retrospectively 1441 ambulatory blood pressure(BP)recordings,and computed:①the standard deviation(SD)of 24 h BP directly from all individual readings;②weighted mean value of daytime and night-time SD(wSD);③the magnitude of nocturnal BP fall(NBPF).Left ventricular mass(n=345)and carotid intima-media thickness(n=216)were determined by echocardiography.Results The 24 h SD of BP was significantly greater than the 24 h wSD(P

Objective To investigate the significance of PI3K/AKT signal transduetion pathway in gastrointestinal stromal tumors(GIST).Methods The expression of PI3K、Akt、PTEN were detected with RT-PCR and Westem-blot of tumor specimens from 124 GIST cases and the corresponding normal gastric mucosa.Results In gastrointestinal stromal tumors,the tumor suppressor gene-PTEN was on low expression as with the inereased expression of PI3K and Akt.The positive expression rate of PTEN,PI3K and Akt was not statistically correlated with patients'demographics and tumor histological type,but they are significantly correlated with lymphatic metastasis and mucosal invasion.The expression of PI3 K and Akt are of significantly positive correlation(r=0.292,P=0.031).The expression of PI3K and PTEN are of significantly negetive correlation(r=-0.412,P=0.036).The expression of PTEN and Akt are of significantly negetive correlation(r=-0.386,P=0.024).Conclusion PI3 K/Akt and P,PTEN may have bean on reciprocally suppressive effect during the development of GIST.

Acrylic Resins ; Dental Materials ; Dental Restoration, Permanent ; methods ; Denture, Partial, Fixed, Resin-Bonded

Objective To evaluate the efficacy of IQ200 urine sediment quantitative analyzer(IQ200) and Mejer700 urine dry chemistry analyzer(Mejer700) in detecting urine erythrocyte(RBC)and leukocyte(WBC) .Methods The WBC and RBC in 1 000 u‐rine specimens were detected by using IQ200 ,Mejer700 and sediment microscopy respectively .Taking sediment microscopy as the golden standard ,the sensitivity ,specificity and accuracy of IQ200 and Mejer700 in detecting urine RBC and WBC were analysed .Re‐sults No statistically significant differences of positive rates of RBC and WBC detected by using the three methods were found (P>0 .05) .When IQ200 and Mejer700 were combined ,the sensitivities of detection of RBC and WBC test were improved .Conclu‐sion The sensitivities of RBC and WBC detection by using IQ200 and Mejer700 are high .Combing the two methods the sensitivity and accuracy is higher ,which could improve work efficiency .Combination of the three methods should be recommended ,in order to improve the quality of urine analysis .

Objective To observe effects of aqueous extractive of Clarke boea herb on mice with gastric ulcer, and provide basis for clinical application.Methods Gastric ulcer model was induced by reserpine. The mice were divided into normal group, model group, ranitidine group, low and high dose of Clarke boea herb groups. Mice in treatment groups were given corresponding drugs by gavage, and the normal group and control group were given the same amount of saline for 4 weeks. The area of gastric ulcer, serum proinflammatory cytokines gastric juice volume, gastric juice acidity, iNOS and COX-2 gene expressions were detected.Results Compared with control group, the gastric ulcer area in low and high dose of Clarke boea herb groups decreased significantly. Clarke boea herb increased the SS and VIP, decreased the MOT and SP serum levels (P<0.05,P<0.01). Clarke boea herb reduced the levels of serum proinflammatory cytokines of IL-6, IL-12, TNF-α and IFN-γ(P<0.05,P<0.01). Clarke boea herb also decreased the genetic expressions of iNOS and COX-2 (P<0.05,P<0.01).ConclusionClarke boea herb has good gastric ulcer preventive effects, and the high dose of Clarke boea herb group showed the best efficiency.

Objective To investigate the protective effect of propotol against hepatic ischemiareperfusion injury in rats on mitochondrial permeability transition pore (MPTP) and the mechanism of GSK-3β.Methods Thirty SD rats were randomly assigned into five groups (n =6):sham operation group (S group),ischemia reperfusion group (I/R group),CsA pretreatment group (C group),propofol pretreatment group (P group),and propofol plus atractyloside pretreatment group (A + P group).Nauta liver ischemia-reperfusion rat model was used.Liver lobes were subjected to warm ischemia for 60min and then reperfusion for 120 min.In P group,propofol [12 mg/(kg · h)] was administered in the femoral vein for 30 min before ischemia until the end of reperfusion.In C group,CsA (2 mg/kg) was administered in the femoral vein for 20min before ischemia.In A + P group,20 μmol/kg of atractyloside was given through the femoral vein 10min before the injection of propofol.Rats were sacrificed at the end of reperfusion,and venous blood and hepatic tissue specimens from the same part of ischemia were obtained from different groups.Results Compared with S group,the AST and ALT levels were increased significantly,mitochondrial swelling were increased and mitochondrial membrane potential were decreased significantly in I/R group and A + P group.Casepase-3 were increased significantly and p-GSK3β Ser9 were decreased significantly in I/R group and A + P group.Compared with I/R group,the content of AST and ALT were decreased significantly,mitochondrial swelling were decreased and mitochondrial membrane potential were increased significantly,casepase-3 release were decreased significantly and p-GSK3β Ser9 were increased significantly in P group and C group.GSK-3β in each group displayed no significant difference.Conclusions Propofol can significantly reduce hepatic ischemia-reperfusion injury.The protective effect of propofol may be achieved via the inhibition of GSK-3β activation,increased p-GSK-3β Ser9 level,suppressing MPTP opening and decreasing hepatocytes apoptosis.