Objective To analyze the effect of cyclooxygenase-2（COX-2）on the invasion and metastasis of gastric cancer with Helicobacter pylori（H.pylori）infection.Methods A total of 60 gastric cancer specimens were included in this study.H.pylori infection was deter-mined by improved Giemsa method and the expression of COX-2 was examined by immunohistochemistry.The correlation between H.pylori infection and the clinical pathological features of gastric cancer was analyzed.Results H.pylori infection was detectable in 36 of 60 cases（60.0%）,and correlated with the staging（χ2=28.040,P =0.000）and lymph node metastasis（χ2=25.482,P =0.000）,but not with the age,sex of patients or histological types.H.pylori infection also significantly linked to the expression of COX-2（χ2=24.326,P 〈 0.001）.Con-clusion H.pylori infection may promote the invasion and metastasis of gastric cancer by increasing the expression of COX-2.

0.05). In both A and B groups the number of CD_3~+, CD_4~+, CD_8~+ T cells and NK was signficantly higher after treatment than before treatment(P0.05). The amount of CD_3~+,CD_4~+ T cells and NK was obivously lower after treatment than before treatment in C group, and CD_8~+ T cells amount significantly increased after treatment compared with before treatment(P

ObjectiveTo measure the setup errors with infrared marker-based positioning system (IM-BPS) and electronic portal imaging device (EPID) for patients with esophageal carcinoma and lung cancer and investigate the accuracy and practicality of IM-BPS. MethodsFrom January 2007 to January 2008, 40 patients with esophageal carcinoma and 27 patients with lung cancer received three-dimensional conformal radiotherapy or intensity-modulated radiotherapy, setup errors during the treatment were measured with IM-BPS and EPID, and the data of setup errors were compared with paired t-test and agreement with x2-test. ResultsIt takes 10 - 12 mins to complete the validating for each patient by EPID) system, while IMBPS system only needs 2 -5 mins. The mean setup errors along x, y and z-axis for patients with esophageal carcinoma measured by IM-BPS and EPID were 3.49 mm, 3. 19 mm, 3.31 mm and 4. 03 mm, 3.41 mm, 3.43 mm, respectively. For the patients with lung cancer, the setup errors were 4. 23 mm, 3.51 mm, 3. 39mm and 4. 85 mm, 3. 53 mm, 3.74 mm, respectively. The difference of setup errors meanured by the two systems was within 1 mm for 65％ esophageal carcinoma patients ( x2 =51.09, P =0. 000), and 55％ lung cancer patients ( x2 =53. 35, P =0. 000).Conclusions The measurement results of setup errors for patients with esophageal carcinoma and lung cancer show that IM-BPS is mostly better than EPID. Though validating for patients can be measured accurately and be well quality controlled, IM-BPS is used easily because of macroscopic, homely,spare time and real-time monitoring.

Analysis on currently used stomatology textbooks for both graduates and postgraduates in China was performed and comparison in stomatology text or reference books between china and American was made.It was found that the types and numbers of stomatology textbooks for both graduates and postgraduates in China were very limited compared with those in American.Many textbooks needed for dental education were insufficient.Great efforts should be made to select relevant topics or titles and to prepare text or reference books accordingly in an aim to meet the needs of today's high quality dental education.

Objective To measure the setup errors and organ movements of patients with esophagus carcinoma during radiotherapy and find a reasonable margin from the clinic target volume (CTV) to the planning target volume (PTV). Methods (1) Set-up veri cation: Forty-two cases of untreated esophageal cancer were enrolled into this study. The physicist firstly made the planning according to the doctor requests and ensured the best distribution at the target. Thereafter, the 0° and 90° digitally reconstructed radiograph (DRR) was transmitted to the iView GT workshop. Meanwhile, two copies of cross-cut electronic portal image (EPI) were required before radiotherapy. Two doctors confirmed the variance of the osteal mark from the EPI and DRR,and output a 3D direction (left to right, superior to inferior, anterior to posterior) of the setup errors through the iView GT software. (2)Breathing motion:Ten cases of untreated esophageal cancer were enrolled into this study.Three distinct breathing levels were deflned: FB (free breathing), EBH (expiration with breath-held) and IBH (inspiration with breath-held). We gave the treatment planning in FB, then by moving the isocenter to EBH and IBH, we recalculated the dose distribution without changing the field angle, shape and weighing (Mus). Displacements were analyzed at four points (anterior, posterior, right lateral and left lateral) and five levels of target (upper, quarter, isocenter, three-quarter and lower). Results (1) The systematic setup errors were -0.23 cm, -0.02 cm and -0.06 cm, and the random errors were 0.44 cm, 0.45 cm and 0.44 cm at the direction of left to right(LR), superior to inferior (SI), anterior to posterior(AP), respectively. (2) The organ movements were 0.3 cm, 0.6cm and 0.3cm at the LR, SI, AP, respectively. Conclusions As an alternative, the root-sum-of-squares of set-up error and organ motion are suggested by σtot=√ (σITV2+σSM2). The CTV to PTV margins are 0.8cm left to right, 0.78cm superior to inferior, 0.5cm anterior to posterior.

AIM To study effects of desulfated and poly sulfated heparin derivatives on rat mast cell (MC) degranulation. METHODS Different methods were used to prepare different sulfated heparin derivatives: 2 O desulfated heparin (2DeSH),N desulfated reacetylated heparin (NDeSAcH),6 O desulfated heparin (6DeSH),poly sulfated heparin (PSH). Passive MC degranulation induced by ovalbumin in rats to was employed observe the effects of different sulfated derivatives on rats MC degranulation. RESULTS All the sample groups were found of obvious inhibition of MC degranulation( P

Objective To investigate the mechanism of nuclear factor-kappa B(NF-κB)in thioactamide(TAA)induced acute hepatic injury.Methods Seventy-eight Wistar rats were randomly divided into normal group(n=18),TAA model group(n=30)and pyrrolidine dithiocarbamate (PDTC)pretreated group(n=30).The rats in PDTC group were received 100 rag/kg of PDTC 1 h before induction of the model.Every 10 rats in TAA group and PDTC pretreated group and 6 rats in normal group were sacrificed at 6,24,48 hour after induction of the model tO mesure levels of endotoxin,tumor necrosis factor(TNF)-α and interleukin(IL)-6.The expression of the intercellular adhesion molecular(ICAM)-1 in hepatic tissue was tested using RT-PCR and the NF-κB activity was 48 hour were higher in TAA group[(87.11±8.23)%.(78.55±6.82)%and(74.27±6.26)%,respectively]than those in normal group[(4.64±1.82)%,(4.55±1.67)%and(4.91±2.12)%,all comparison with normal group(P＜0.01).The serum concentration of endotoxin and TNF-α in PDTC pretreated group were higher than those in normal group(P＜0.0 1).but lower than those in TAA with ticrmal group(P＜0.01).The serum concentration of IL-6 in PDTC pretreated group was higher at 24 and 48 hour than those in normal group(P＜0.01),but lower than thoes in TAA group(P＜group(P＜0.01).The expression of ICAM-1 in PDTC pretreated group was higher than that in immunohistochemical examination showed that liver necrosis was folund in TAA group and PDTC pretreated group.Conclusion The Nuclear factor-κB may aggravate the injury of liver by promoting expressions of TNF-α,IL-6 and ICAM-1.

OBJECTIVE: To observe clinical efficacy of Bifid tripie viable enteric-coated capsules in the treatment of children diarrhea after pneumonia. METHODS: 360 cases of children pneumonia were randomly divided into two groups. Treatment group were treated with antibiotics and Bifid triple viable enteric-coated capsules in duration of hospital stay(n=180). Control group were treated with antibiotics only (n=180). The incidence and severity of diarrhea in two groups were observed at the 3rd, 5th, 7th of therapy. RESULTS: The incidence of diarrhea at the 3rd, 5th, 7th of therapy in treatment group were 10.00%,16.67% and 13.33%, in control group 36.67%, 43.33% and 50.00%, with statistically significance(P

ObjectiveTo demonstrate the project scope of the afferent nerves of the lumbar intervertebral disc,on which basis to explore the mechanism of the symptoms of discgenic low back pain.MethodsThirty Wistar rats were divided randomly into three groups of 10 rats each:the L4-5,L5-6,and L6 S1 group.Each group was further divided randomly into two subgroups,the experimental group and the control group,5 rats for each group.Intervertebral disc was exposed through the posterior approach under peritoneal cavity anesthesia,after the nerve roots were pull away,2 μl of 30％ cholera toxin-horseradish peroxidase (CT-HRP) was injected into the inner layer of the intervertebral disc in the experimental group,while 2 μl of 0.9％ Nacl was used in the control group.Forty-eight hours after the surgery,all rats were perfused and bilateral dorsal root ganglions(DRGs) of T10-L3 were resected and fixxied.Each DRG was sectioned at 30 μm thickness and processed by DAB method.The sections of DRGs were coverslipped and observed by optical microscopy for the neurons or axons labelled by CT-HRP.It was judged as positive that brownish-black particles were in the neurons or axons.ResultsNot in a single dorsal root ganglions,but in a scope of dorsal root ganglions axons labled by CT-HRP could be seen in the rats in the experimental groups.No CT-HRP labled neurons or axons were seen in dorsal root ganglions in the contral groups.ConclusionAfferent nerves of the lumbar intervertebral disc project to a scope of dorsal root ganglions,which is the anatomic basis of the mechanism of the symptoms of discgenic low back pain.