Objective To study the inhibitory effects of dendritic cells modified by sCD41)gene on T lymphocytes phenotypes and cytokines production and the mechanism of inducing donor-specific immune tolerance in vitro.Methods T lymphocytes prepared with Nylon Fiber Column from Balb/c mice(as reaction cells)and DCs of different groups(as stimulation cells)were subjected to primary mixed lymphocyte culture(MLC).After incubation for 7 days,the responsiveness of the cells was de- tected by MTS method at the indicated time points,and supernatants were assayed for IFN-?,IL-2, IL-4,IL-10 by ELISA kits.On the day 5,the cultured cells were assessed for the expression of CD4, CDS,CD25 and CD69 by using flow cytometry(FCM).After secondary MLC for 5 days,the same indexes were assayed hy using the same methods.Results Dendritic cells modified by sCD40 could in- duce the hyporesponsiveness to alloantigen in primary and secondary MLC.In primary MLC,the ex- pression of CD4~+ and CD8~+ T cells and CD4~+ CD25~+,CD8~+ CD25~+,CD4~+ CD69~+,CD8~+ CD69~+ T cells in IX;modified by sCD40 group were less than those in control group(P

Objective:To observe clinical therapeutic effects of method for supplementing Qi,activating blood circulation and resolving phlegm and effects on vascular endothelial function and blood coagulation system in senile patient of hyperlipemia.Methods:96 senile patients of hyperlipemia were randomly divided into a treatment group(n=56)and a control group(n=40).The patients of the treatment group were treated by oral administration of Danshen Jueming Granules and the control group by oral administration of Xuezhikang Capsules.Blood lipids,vascular endothelial function,blood coagulation system and safety were observed.Results:After treatment,the treatment group in decrease of plasma total cholesterol(TC)and low density lipoprotein-cholesterol(LDL-C)was superior to the control group(P

Objective To observe the ultrastructure changes of brain of the late trimester of fetal rats via transumbilical vein injection using contrast-enhanced ultrasonography.Methods The forty pregnant rats in the late trimester were divided into four experimental groups randomly.After being successfully punctured in the umbilical vein,two fetus was randomly chosen from maternal uterus with injection contrast agent SonoVue or normal saline solution(20 fetus/each group).Group A as control group with injection of normal saline solution(120 μl/kg);group B as low dose group with injection of SonoVue 0.014 mg/kg(120μl/kg,0.118 ng/ml);group C as media dose group with injection of SonoVue 0.14 mg/kg(120 μd/kg,1.18mg/ml)and group D as high dose group with injection of SonoVue 1.4 mg/kg(120 μl/kg,11.8 mg/ml).After observing the process of every contrast-enhanced ultrasonographic examination,tissue slices of brain of these fetus were made for electronmicroscope investigation.Results ①There was no enhancement in the fetus and placenta in group A.Enhancement couldn't be clearly seen in group B because of fast wash-out contrast agent.On the contrary,the fetus and placenta enhancement in turn could be seen in group C and group D.Enhancement never be seen in maternal uterus and uterine outside.②There was no significant difference of ultrastructure changes of the fetal brain tissues in group A and group B with electronmicroscope.Different degree rough endoplasmic reticulum enlargement,mitochondria swelling,endothelial cell injury,glycogen deposition and vacuolization in the brain cells were found in group C and group D,and the value of contrast between the two groups was significantly different(P＜0.05).Conclusions It is decreasd gradually effects to perform transumbilical vein contrast enhanced ultrasonography with reducing gradually dose for the late trimester of fetal rats,but enhancement has been invisible in the low dose group.

Objective To evaluate the safety of modified sputum induction in moderate to very severe COPD during exacerbation. Methods Ninety patients with moderate, severe or very severe COPD during exacerbation (27 with type Ⅰ and Ⅱ respiratory failure,18 with coronary heart disease, 38 with tachycardia) were chosen as research subjects. All the patients underwent induced sputum. During induction , all patients were given electrocardiographic monitoring and pulmonary function check every 5 minutes and FEV1, HR, SpO2 in the process of testing were recorded. Results Ninety patients underwent 224 sputum inductions progress, 222 were safety. Qualified sputum samples were collected for 216 times, sputum induction was successful in 96.43% of occasions. Heart rate rising and SpO2 reducing during sputum induction mainly occurred in the beginning 5 minutes, FEV1 did not change in the whole process. Conclusion Modified sputum induction can be safe through closely monitoring in patients with moderate-to-very severe COPD with exacerbation, even with type Ⅰ or typeⅡ respiratory failure. But the risk of sputum induction will increase if patients with coronary heart disease and tachyarrhythmia, especially within beginning 5 minutes of sputum induction.

AIM: To investigate the effects of Astragalus polysacharin(APS) on human fibroblast and human umbilical vein endothelia cell (HUVEC) proliferation, as well as its acts on adhesion between white cells and HUVECs. METHODS: Human fibroblasts from distal and proximal skin away the ulcer were cultured as normal fibroblasts(NF) and wounded fibroblasts(WF). MTT assay was used for detecting cell proliferation, Rose Bengal staining and fluorescence immunohistology assay were used for examining the adhesion of human polymorpho-nuclear cell(PMN) and TPH-1 to HUVECs. RESULTS: 2 44-156 mg/L APS promoted WF proliferation, and 2 44-39 mg/L APS also promoted NF proliferation, but it did not show any proliferating effect on HUVECs. APS inhibited the adhesion of PMN or TPH-1 to HUVECs induced by tumor necrosis factor(TNF). At 25-100 mg/L, it also inhibited both VCAM-1 and ICAM-1 expression in HUVECs induced by TNF. Treatment with APS for 12 h also inhibited CD44 expression in HUVECs. CONCLUSION: APS shows mitogenic activity on both human normal and wounded fibroblasts. It also exerts anti-inflammation effects by inhibiting adhesion molecule expression and adhesion of white cells to HUVECs. [

Objective To explore the effect of different processing and drying methods of corn and hot pepper on fluorine content in coal-burning type of the endemic fluorosis areas, and to screen food processing and drying methods which meet the quality requirements of grain drying and able to effectively reduce the total fluoride intake of local population. Methods Farmers of endemic fluorosis area in Bijie, Guizhou province were divided into 3 groups: sun-baked drying group, stove drying group with air-tight cover and stove drying group with no cover, 10 households in each group. Corn and fresh hot pepper and samples dried for 2 weeks, or 1, 3, 6-month were collected, and water and fluoride content were detected, and the total daily fluoride intake were calculated in accordance with the "Determination of Water in Food" (GB/T 5009.3-2003) and "Determination of Fluorine in Foods"(GB/T 5009.18-2003). Results Fluoride content in fresh corn and dried for 2 weeks, or 1, 3, 6-month [of sunbaked drying group: (1.40 ± 0.16), (1.56 ± 0.14), (2.15 ± 0.47), (2.70 ± 0.64), (4.06 ± 1.75)mg/kg, stove drying group with air-tight cover: (1.41 ± 0.16), (2.39 ± 0.56), (4.60 ± 0.97), (8.46 ± 5.55), (11.36 ± 3.60)mg/kg,stove drying group with no cover: (1.40 ± 0.13), (4.69 ± 3.97), (4.47 ± 2.77), (9.65 ± 6.47), (26.12 ± 14.52)mg/kg] and pepper[sun-baked drying group: (5.41 ± 1.61), (16.60 ± 7.62), (32.60 ± 7.88), (50.26 ± 17.60),(240.20 ± 272.49)mg/kg, stove drying group with air-tight cover: (754 ± 2.95), (3238 ± 11.50), (119.18 ± 156.45),(224.00 ± 196.58), (495.70 ± 417.29)mg/kg, stove drying group with no cover: (4.82 ± 1.25), (44.30 ± 13.48),(122.89 ± 66.43), (334.23 ± 166.05), (531.01 ± 397.40)mg/kg] increased with elongation of drying time, and the group difference was significant(F = 44.77, 128.71, 126.87, 41.61, 53.63, 170.63, all P ＜ 0.05), with the largest rate of increase in stove drying group with no cover, and the lowest in sun-baked drying group;fluoride was significantly lower (t = 7.93,63.07,5.36,11.98,55.76,7.45, all P ＜ 0.05) after sample washing;total fluoride intake per person per day was 2.57 mg in local adult when ate washed and sun-baked corn, peppers, the total fluoride intake were 5.92, 8.14 mg when ate the food processed by other two drying methods and washed corn, peppers,respectively. Conclusions In the coal-burning type of fluorosis endemic area, should take appropriate health education measures, and instruct local residents to use sun bake their edible corn and pepper for human consumption, and cultivate a habit of washing corn and pepper before cooking, which can reduce the population total fluoride intake, and control endemic fluorosis.

Objective To evaluate the effects of implementing the health education in the Central Fund Program to control endemic fluorosis in Guizhou.Methods The samples were randomly surveyed to evaluate knowledge awareness in students and households as well as the habit formation after implementing the integrated program which mainly consisted of installing the improved stoves,supported by the Central Funds and health education in 5 counties.Results After health education,the rates of knowledge awareness in the students and the households were 94.80%(15 562/16 415)and 88.23%(4482/5080),respectively,and increased significantly compared with those before intervention[44.20%(26 364/59 645),22.81%(3082/13 510)],the difference being significant(χ2=13 324.05,6546.24,P＜0.01).The rates of drying corn and chili with the coal fire were 5.61% (57/1016)and 5.41%(55/1016),respectively,and decreased significantly compared with those before intervention [77.41%(1076/1390),78.92%(1097/1390)],the difference being significant(χ2=1214.49,1270.92,P＜0.01).The rates of washing corn and chili were 99.51%(1011/1016)and 94.59%(961/1016),respectively,and increased significantly compared with those before intervention[84.60%(1176/1390),76.55%(1064/1390)],the difference being significant(χ2=154.80,143.32,P＜0.01).The rates of using the uncovered and unventilated iron stoves and table stoves were 4.71%(38/807)and 8.37%(60/717),respectively,and decreased significantly compared with those before intervention[29.99%(14 483/48 299),98.33%(95 070/96 685)],the difierence being significant(χ2=243.51,25 282.99,P＜0.01).Conclusions Implementing the health education is the basis for the integrated measures for controlling the endemic fluorosis in the endemic regions.The consciousness and activity of the target people have been enhanced greatly.The good behaviors in the target people are forming,the expected goal is reached.

Objective To explore the influence of stoves and mode of coal-burning on the prevalence of endemic fluorosis in Guizhou Province.Methods Three previous severe endemic villages and two mild villages(as control)were investigated by ways of random sampling in the present and retrospect epidemiological study on stove usage,coal burning mode and the severity of disease.Results Before the 1990's Of 20th century all the households in the previous severe endemic villages used the open stove without ventilated pipe(chimney)and dehydrated the corn over the coal-fire of the open stoves in house,which resulted in severe pollution of the corn and indoor air by fluoride.After the 1990's,each household,although still dried the corn with the coal fire,used the table stoves and iron stoves increasingly year by year,which resulted in the decrease of the emitted fluoride from the coal fire significantly,reduced the fluoride pollution of the indoor air and the main food,thus the incidence of endemic fluorosis consequently decreased. On the other hand, most of the households in the previous severe endemic villages such as Lianhe and Yuanzi still used the open, unventilated stove without chimney, very few installed chimney leading to outside of the room,the rates being 51.3%(41/80)and 41.7%(35/84),respectively.It was concordant to the high incidence of endemic fluorosis.Compared with 1979,the detective rates of dental fluorosis in the crowd aged above 8 years old were increased significantly in Hehua Village in 2006,90.51%(248/274)and 96.08%(392/408),respectively(χ2=7.85,P＜0.01).Conclusions The usage of stoves and mode of coal-burning significantly influence the incidence of the endemic fluorosis caused by domestic coal-burningin Guizhou Province,and inappropriated use of stove and the mode of coal burning are the key factors in cause the prevalence of the severe fluorosis in endemic regions in Guizhou.

Objective To investigate the usage of fluorine-proof iron stove in regions with coal-burning borne endemic fluorosis of Guizhou province and to provide scientific basis for the project management. Methods According to "the local prevention programs against coal-burning borne endemic fluorosis-Guizhou iron stove usage survey scheme", in the 18 counties implemented the project of improving the iron stove from 2005 to 2008, 2 townships were selected randomly in each county of each project annually, 2 villages were selected in each township randomly, and 10 households were checked in each village. The project households were investigated using questionnaire of the related health knowledge and awareness as well as the satisfaction of the households.Results ①The improvement rate of iron stove was 100.00%(1286/1286). ②The overall utilization rate of the improved stove was 94.09% (1210/1286), in which winter was 62.21% (800/1286) and annual was 31.88%(410/1286). ③Among the households that did not use the project stove, 46.05%(35/76) households was due to switch to other clean energy, in addition, 19.74%(15/76) was due to sell or send to other households, and 14.47%(11/76) was still used to use the open kitchen without the ventilating pipe, and still 13.16%(10/76) was due to high coal prices, and 6.58%(5/76) was due to that the improved stove can not meet the needs of life and no longer used. ④Amoag 1261 households investigated, households with damaged furnace was 24.58%(310/1261 ), and the parts damaged were mainly chimney (ventilating pipe) and the furnace core, accounting for 51.94%(161/310) and 29.03%(90/310), respectively. Repair rate of the damaged parts was 32.58%(101/310). ⑤The health knowledge rate was about 82.74% (1064/1286), and the satisfaction of the iron furnace was 88.65% (1140/1286).Conclusions The improved stoves for the prevention of endemic fluorosis in the diseased area meet the people's living habits, and meet their basic livelihood needs. Most project households are still using the improved furnace.But we still need to further strengthen the project management and the health education intervention, establish and improve stove maintenance network, and reach the goal of sustainable control of coal-burning borne endemic fluorosis.

Objective To explore the relationship between the inflammatory reaction and insulin function in children with critically ill.Me-thods Ninty-six children with critical disease in Oct.2003 to Oct.2006 were enrolled in the study.Blood sugar,plasma insulin,C-peptide,tumor necrosis factor(TNF)-?,C reactive protein(CRP)were measured in the peak period and convalescence.Results Blood sugar and plasma levels of insulin,C-peptide,TNF-?,CRP were significantly higher in the peak period than those in the convalescence(Pa