The study aimed at investigation the effect of the transgenic biocontrol bacteria 308R(pCPP430) on the tomato rhizosphere bacterial communities. Strain 308R (Pantoea agglomerans), an adnascent bacterium isolated from tomato, was a biocontrol bacterium. The recombinant cosmid pCPP430 contained the hrp gene cluster of Erwinia amylovora was transformed into 308R Strain. Transgenic biocontrol bacterium 308R(pCPP430) produced Harpin protein which induce hypersensitive response and disease resistance in plants and, surprisingly, increase plant growth. Two complementary methods, sole-carbon-source utilization tests (SCSU) and ERIC-PCR, were used to compare the characterization of bacterial communities from three groups of tomato roots dipped in sterilized water, 308R suspended liquid and 308R(pCPP430) suspended liquid. The cluster analysis and principal components analysis of the number of colonies from SCSU indicated consistent differences in the rhizosphere of each group. Cluster analysis of SCSU data showed that there were consistent differences in the rhizosphere of each group. The rhizosphere bacteria communities of root dipped with 308R(pCPP 430) and 308R have a relative good replication, but the differences of corresponding replicates in dipped with distilled water was increased by degrees. Cluster analysis of ERIC-PCR fingerprints revealed that most of results (eight in ten) have overlaps between roots dipped in water and those dipped in 308R liquid. The methods used in this study may prove a useful approach for the comparison of bacterial communities.

Hepatic artery stricture (HAS) after liver transplantation can lead directly to transplanted liver function exhaustion and complications of biliary system. The early diagnosis and treatment are crucial for better prognosis. Doppler ultrasound is the first method of choice, and angiography can give further clear dignosis. The balloon dilatation is still effective for hepatic arterial stenosis. With the more adaptable usage of oronary stent, if possible, would reveal more promising result especially for tortuous stenotic hepatic artery. The vascular reconstruction or repeated liver transplantation is still the effective therapeutic methods.

? AIM: To investigate the differences between synoptophore and triple prism strabismometry and its possible cause.?METHODS: There were 347 patients with horizontal concomitant strabismus involved, in which 76 patients were esotropia, 37 patients were male while 39 were female, with average age of 13. 27 ± 7. 77 years old. There were 271 patients with exotropia, 131 cases were male while 140 were female, with average age of 15. 43 ± 8. 42 years old. All the patients were examined by synoptophore and prism plus shaded strabismometry in a long distance of 6m. Datas were analyzed by SPSS 17. 0.?RESULTS:In the exotropia patients, the conversions of circular degree(°) and prism degree(△) were:1°=0. 29△ ~1. 78△, which was statistically significant with intermittent strabismus (P=0. 001). While in the esotropia patients, the conversions were:1°=2. 01△ ~2. 15△.?CONCLUSION: The diversity between the two methods is enlarged with the increase of squint angle for exotropia patients. While in esotropia patients, the diversity decreased with the increase of squint angle. Synoptophore equipped with +7. 00D, defects of the triple prism itself and proximal convergence during exam may be the reasons for the diversity.

Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Low Back Pain ; etiology ; Male ; Spinal Puncture ; adverse effects

BACKGROUND: It has been verified in relevant clinical and epidemiological researches in recent years that a part of stomatopathy is associated to psychological stress factors.OBJECTIVE: To analyze the relationship between the changes in salivary secretory IgA and cortisol and psychological stress states.DESIGN: cross-sectional investigation was designed.SETTING: Department of Stomatology, Zhejiang University.PARTICIPANTS: The investigated participants were 60 students in the 2nd grade of Fuzhou №.2 Senior School selected from May to November 2003. Fifty-seven of them accomplished the investigation, of male; aged varied from 17 to 19 years, of healthy, no stomatopathy and family history of disorders in immune system and without indulgence in smoke and alcohol. All of them had participated in the 3-day terminal exam.METHODS: Before the exam, evaluation with symptom checklist (there are 90 questions, including about 10 factors, such as somatization, compulsive state, sensitive interpersonal relationships, melancholy, anxiety, hostility, fear, paranoid state, psychotic state and others. The total average score results by divided total score with 90. ) was applied. Fifty-seven students that had accomplished the investigation were divided in low-symptom group (the total score of symptom checklist ＜ 2.0) and high-symptom group (the total score ≥ 2.0). 5 weeks before the exam, the students were called together to fill up investigation form of general situation. Four weeks before the exam and at 7: 30 am on the day of exam, the first and second saliva specimens were collected respectively to determine salivary secretory IgA and cortisol before and after exam stress. The students were called together again 3 days after exam to fill up questionnaire on psychological health to evaluate their psychological health state.stress.RESULTS: Intention management analysis was adopted, in which 57 stulist with Chinese norm: after exam, the scores of 4 factors, named compulsive state, anxiety, hostility and paranoid state, were higher than Chinese norm [(1.98±0.72, 1.69±0.61) scores; (1.79±0.31, 1.42±0.43) scores; (1.77±0.68,1.50±0.57)scores; (2.00±0.71, 1.52±0.60)scores, P ＜ 0.01] and there was parison of salivary secretory IgA content after stress: that before exam in low symptom group was remarkably higher than that in high symptom group [(236.6±82.29),(194.55±66.29) mg/L, P ＜ 0.05], that after exam in low symptom group was higher than that in high symptom group [(182.21±55.92,tration after stress: that after exam in low symptom group was remarkably higher than that in high symptom group [(5.96±2.46, 3.68±2.26) μg/L, P secretory IgA and cortisol in two groups: the decrease rate of secretory IgA (0.012±0.197) and increase rate of cortisol (0.199±0.654) were relevant to compulsive state and paranoid state.CONCLUSION: In evaluation with symptom checklist after exam, the scores of anxiety, compulsive state, hostility and paranoid state were higher than Chinese norm, indicating that exam stress induces increased anxiety level and variation of psychological behavior of students. The difference presented in decrease rate of salivary secretory IgA before and after exam stress between high and low symptom groups, explaining that the students with more psychological symptoms are weak to endure exam stress.

Objective To determine if fetal stem cells can enter the maternal circulation during pregnancy and re-pair the injuries of maternal heart.Methods C57 female mice at the age of 6-8 weeks were randomly assigned to three groups:sham control, surgery without pregnancy, and surgery with pregnancy ( n=8,eath group) .The control sham group was developed by opening and closing of the chest.The other two groups underwent heart surgery.The myocardial infarc-tion ( MI) model was induced by ligation of the left anterior descending coronary artery.Half of the surgical mice mated with e-GFP transgenic male mice, and another half group was not.Electrocardiogram ( ECG) and echocardiographic images were recorded at pre-operation, post-operation and postpartum.The collected data were used to evaluate the heart function. The GFP expression was detected by immunohistochemistry and q-PCR.Results When compared with the sham group, both the ischemia surgery groups with and without pregnancy, the ECG ST segment was significantly increased.This meas-urement indicated that the myocardial ischemia surgery was successful, and no significant difference in the ST segments be-tween two ischemia surgery groups was found.However, when ECG was measured in the surgical mice after postpartum, their myocardial ischemia was dramatically improved when compared with that of the ischemia surgery only mice.Echocar-diographic images also indicated that both the surgery groups had myocardial ischemia, however, no significant difference was observed in the pregnant mice before and after postpartum.The order of the cardiac function indexes from high to low was the sham group, surgery with pregnancy group, and surgery with no pregnancy group;in particular, the cardiac func-tion of pregnancy group was significantly enhanced compared with that of the surgery with no pregnancy group (P<0.05). More importantly, both immunofluorescence and q-PCR results showed that the embryonic stem cell translocation through circulation system with GFP expression in the heart of pregnancy group, while negative in other two groups.Conclusions Embryonic stem cells can be transferred into the maternal circulation of pregnant mice, and play a role in the repairing of their cardiac injuries.

Aim To establish a hepatic carcinoma cell line with stable voltage-gated chloride channel 3 ( ClC-3 ) gene silencing through the lentivirus-mediated short-hairpin RNA ( shRNA ) method and investigate the effects of gene silencing on invasion and migration. Methods Three lentiviral vectors coding shRNA tar-geting ClC-3 gene were constructed, the recombinant plasmids were packaged into mature lentivirus by 293FT cells, and then the lentiviruses were harvested, concentrated and titrated. MHCC97H cells were infec-ted with the recombinant lentiviruses and then were se-lected to obtain cell lines stably expressing ClC-3 shR-NA. The efficiency of ClC-3 mRNA and protein ex-pression interference were determined by real-time flu-orescence quantitative PCR and Western blot, respec-tively. The effects of ClC-3 gene interference on inva-sion and migration of MHCC97 H cells were performed by Transwell chamber assays with or without Matrigel and cell scratch assay. Results The recombinant lentiviral vectors were successfully constructed and four lentiviruses were acquired after packaged by 293 FT cells. One negative control cell line and three cell lines with ClC-3 gene interference ( MHCC97 H/shClC-3-1 , shClC-3-2 and shClC-3-3 ) were successfully construc-ted after MHCC97 H cells were infected with lentivirus-es. The expression level of ClC-3 mRNA and protein in three ClC-3-silenced cells were obviously lower than the negative control cells ( P <0. 01 ) , MHCC97 H/shClC-3-2 cells showed the greatest inhibition of ClC-3 mRNA and protein expressions. As compared with the negative control cells, the ClC-3 gene interference sig-nificantly decreased invasion and migration of MH-CC97 H cells in vitro ( P <0. 01 ) . Conclusion The hepatic carcinoma cell lines with stable ClC-3 gene si-lencing were successfully established and the ClC-3 gene interference could significantly inhibit invasion and migration of MHCC97H cells.

Objective To improve the quality standard ofZushima Plaster.Methods TLC was used to do qualitative identification of daphnetin and 7-hydroxycoumarin inZushima Plaster. The contents of daphnetin and 7-hydroxycoumarin inZushima Plaster were determined by HPLC. The chromatographic column was Agilent Eclipse Plus C18 (4.6 mm×250 mm, 5μm), and the mobile phase consisted of acetonitrile-0.1% phosphoric asid (15∶85, V/V) at a flow rate of 1.0 mL/min. The column temperature was maintained at 30℃, and the detection wavelength was set at 327 nm. Results Characteristic spots of daphnetin and 7-hydroxycoumarin could be detected by TLC from the samples, and the spots were clear and specific without interference from negative samples. The calibration curve of daphnetin and 7-hydroxycoumarin were linear in the ranges of 0.180-1.800μg and 0.100-1.00μg (r=0.999 1,r=0.999 2), and the average recovery rates were 98.99% and 101.48%, RSDwere1.43% and 1.32%, respectively (n=9).Conclusion The established method appears easy to use, accurate and specific, and therefore can be used for the quality control ofZushima Plaster.

AIM: To investigate the status of myopia in students from different kinds of schools in Shantou city, China.
METHODS: In this cross-sectional study, 2 418 students from 4 middle and high schools in Shantou were surveyed through randomized cluster sampling. Ophthalmic examination and auto-refraction were performed for all subjects.
RESULTS: Among all 2 394 students examined. The myopia rates for students from middle and high school were 48. 07% and 68. 28%. In normal middle school, students from rural area had lower rate of myopia than students from the urban area (χ2 = 13. 879, P<0. 01 ). Students from key rural high schools had lower rate of myopia than students from key urban high school (χ2 =175. 231, P<0. 01).
CONCLUSION:The prevalence of myopia in the middle school of urban area in Shantou was higher than rural area. The increasing rate of myopia in youngsters is correlated with study stress. In order to decrease the myopia rate, it is extremely important to improve study environment in students.

AIM:To analyze the effects of oxymatrine(OMT) on the quantity of murine regulatory T cells(Tr cells) in the peripheral blood and mouse lymphocyte proliferation stimulated by Con A,and to probe into the immunological mechanism that OMT treats allergic contact dermatitis(ACD).METHODS:An ACD mouse model stimulated by dinitrofluorobenzene(DNFB) was established.Different dosages of OMT,PBS and hydrocortisone(HCT) were intraperitoneally injected(IP) into the mice.Blood samples were collected at 1 d,7 d,14 d,21 d and 28 d,then the T cells were isolated and marked with anti-CD3,anti-CD4,anti-CD25 three-colored immune fluorescence antibody to detect the quantity of CD4+CD25+ T cells with flow cytometry.The fluorescence intensity changes of lymphocytes which were isolated from mouse's lymph node and co-stimulated by polyclonal stimulator Con A and OMT were examined by carboxyfluorescein diacetate succinimidyl ester(CFDA-SE) staining and flow cytometry.RESULTS:OMT at concentrations of 500,125 and 31 mg/L had the ability to restrain the proliferation of lymphocytes from lymph node in a dose dependent manner.However,OMT at concentrations of 16,8,4 and 2 mg/L promoted the proliferation of T lymphocytes from lymph node,but was not obviously dependent on its concentration.Intraperitoneal injection of OMT increased the numbers of CD4+CD25+T cell in peripheral blood obviously(P