Objective:To study the dynamic frictional resistance in the buccal segment between preadjusted brackets coupled with different archwires,at different times under artificial saliva condition.Methods: The dynamic friction of different combinations of 4 kinds of preadjusted brackets and 4 archwires were tested simulating archwires sliding in the buccal segments at 4 different times(0,15,30,45 d)under artificial saliva condition by using Instron universal testing machine.Results: The dynamic frictional resistance of combinations of 3M MBT bracket and all archwires were the smallest.The combinations of 0.46 mm inch stainless steel round wire and all brackets produced significantly lower dynamic frictional resistance than that of other archwires.The 0.48 mm?0.64 mm inch stainless steel rectangular wire produced the highest dynamic frictional resistance combined with all preadjusted brackets.The dynamic frictional resistance of combinations of archwires and brackets were highest at the 15th day and smallest at the 30th day under artificial saliva condition.Conclusion: 0.46 mm stainless steel round wire produces the smallest dynamic frictional resistance combined with all preadjusted brackets.3M MBT brackets are more favorable to sliding mechanics compared with other brackets.As for time,the lowest dynamic frictional resistance exhibits at the 30th day under artificial saliva condition.

Objective: To explore the therapeutic efficacy of transduction of p53 gene with Tie2-mediated gene delivery system in the treatment of lung cancer and provide experimental basis for future clinical application. Methods: GA3, a small peptide against Tie 2, was conjugated with PEI by bifunctional crosslinking agent SMCC to construct Tie2-targeted gene vector. Then pCMV-luciferase cDNA was combined with GA3-PEI to form an electrostatic complex. GA3-PEI/luciferase cDNA complex was transduced into Tie2-positive SPC-A1 lung cancer cells and Tie2-negative SMMC7721 hepatic cancer cells in vitro. The activity of luciferase was measured 24 h later. The GA3-PEI/β-gal complex was injected into peri-tumorous tissues of the transplanted SPC-A1 tumors in nude mice in vivo. Meanwhile, PEI/β-gal gene was injected as control. The nude mice were decapitated 24 h later. The heart, liver, spleen, lung, kidney and tumor tissues were excised and stained with X-gal. Human lung cancer SPC-A1 cells were inoculated subcutaneously into the 4-week-old female athymic mice (BALB/c). The mice were randomly divided into 5 groups (NS, GA3, p53, PEI/p53, and GA3-PEI/p53) with 6 mice in each group. GA3-PEI/ p53 1 μg was subcutaneously injected into peri-tumorous tissues once every two days. The tumor volume was calculated according to formula (V = πab2/6). The tumor-inhibiting ratio was calculated regarding NS group as control. Results: The activity of luciferase of GA3-PEI/luciferase was significantly higher in SPC-A1 cells than that in SMMC7721 cells (P<0.05). A lot of blue-stained cells were observed in transplanted tumor tissues but not in heart, liver, spleen, and kidney tissues except lung bronchial mucosa. Compared with NS group, GA3-PEI/p53 significantly inhibited the growth of tumor by 61.29%. Conclusion: Transfer of p.53 gene by GA3 gene delivery system remarkably inhibits tumor growth.

The necessity to apply medical devices properly was introduced, and the present situation of the application of hospital medical devices were discussed from the aspects of overuse, abuse, operation and supervision. Some countermeasures were put forward to solve the problems in the application of hospital medical devices. It's pointed out that the application of hospital medical devices tends to be standardized with the progress of medical reformation, the attention on medical devices management, the supervision and etc.

Antirheumatic Agents ; therapeutic use ; Arthritis, Juvenile ; therapy ; Biological Products ; therapeutic use ; Child ; Humans

With inlet temperature, specific gravity, feeding speed as independent variables, the comprehensive evaluating indexes of content of schisandrin and arctiin as dependent variable, the experimental data were fitted to a second order polynomial equation. Based on establishing the mathematical relationship between the comprehensive evaluating indexes and respective variables, Box-Benhnken central composite test and response surface analysis method was employed to optimize the spray drying technology of Biqiu granules ethanol extract. The optimal drying parameter was as follows: the inlet temperature was 175 degrees C, the specific gravity was 1.10, feeding speed was 32 r x min(-1). Under these conditions, the comprehensive evaluating indexes of spraying dry processes was 92.68, which was close to the model prediction. The spraying dry technology of Biqiu granules ethanol extract optimized by response surface methodology was accurate and feasible, which provided theoretical experiment basis for the industrialization production.
Chemistry, Pharmaceutical ; methods ; Chromatography, High Pressure Liquid ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Ethanol

Diagnosis, Differential ; Fibroadenoma ; metabolism ; pathology ; surgery ; Humans ; Keratins ; metabolism ; Lipoma ; metabolism ; pathology ; surgery ; Male ; Middle Aged ; Mucin-1 ; metabolism ; Neoplasms, Multiple Primary ; metabolism ; pathology ; surgery ; Thymoma ; metabolism ; pathology ; surgery ; Thymus Neoplasms ; metabolism ; pathology ; surgery ; Vimentin ; metabolism

OBJECTIVETo investigate the expression of FSCN1 in human epithelial tumors and their clinical significance.

METHODSFSCN1 expression was examined immunohistochemically in specimens of human epithelial tumors, including 26 cases of lung cancer, 33 cervical cancer, 22 ovarian cancer, 38 esophageal cancer, 24 pancreatic cancer, 23 gastric cancer, 29 laryngocarcinoma, 17 primary hepatocellular carcinoma, 34 colorectal cancer, 33 breast cancer, 24 nasopharyngeal carcinoma and their corresponding normal tissues.

RESULTSThe positivity rates of FSCN1 expression in epithelial tissues and epithelial tumors were 6.3% (5/80) and 58.7% (178/303), respectively. FSCN1 showed higher expressions in cervical cancer, ovarian cancer, esophageal cancer, pancreatic cancer, gastric cancer, laryngocarcinoma, colorectal cancer, breast cancer and nasopharyngeal carcinoma, but lower or no expression in the corresponding normal tissues (P<0.05). In gastric cancer and nasopharyngeal carcinoma, the edges of the tumors were more strongly stained for FSCN1 than the interior of the tumor.

CONCLUSIONFSCN1 expression is significantly upregulated in human epithelial tumors in close correlation with tumor occurrence and progression.

Carrier Proteins ; biosynthesis ; Esophageal Neoplasms ; metabolism ; pathology ; Female ; Humans ; Immunohistochemistry ; Laryngeal Neoplasms ; metabolism ; pathology ; Microfilament Proteins ; biosynthesis ; Neoplasms ; metabolism ; pathology ; Neoplasms, Glandular and Epithelial ; metabolism ; pathology ; Uterine Cervical Neoplasms ; metabolism ; pathology

0.05)in the frequency of alleles and genotypes between controls and coronary heart disease.In additional,at the 325 position,the TAFI antigen of the Thr325Thr was higher[(114.89?2.53)%]than that of the other genotype(Thr325Ile and Ile325Ile),there was significant difference between the TAFI antigen of the Thr325Thr and the others(P 0.05).But the TAFI activity of the Ile325Ile was lower(3.08?3.63 ?g/ml)than that of the other genotypes(Thr325Ile and Thr325Thr),there was significantly difference between the TAFI activity of the Thr325Thr and the other(P

Objective To study the correlation between obesity and clustering of major risk factors on cardiovascular disease in the elderly.Methods A cross-sectionai study was conducted.Data from 546 elderlY aged 60-90 were analyzed for the relationship between obesity and clustering of risk factors for cardiovascular diseases,with descriptive statistical methods,x2 test,logistie regression and ROC curve．Results (1)The positive rates of the four major risk factors and clustering appeared an upward trend along with the BMI and or the wc.The overall positive rate of clustering of risk factors among the total 546 elderly people was 59.5％,and 52.5％in males,65.7％in females.(2)As compared with females,males had a higher growth rate of clustering with the elevating of BMI and WC.and odds ratios of the highest-level groups were 13.579 and 2.876 in males and females.Respectively.(3)Both BMI and WC were independent influencing factors for male(P<0.05),and logistic regression coefficients were 0.196 and 0.074 for BMI and WC,respectively.Only WC appeared to be the independent influencing factor for females(P<0.05),while BMI WaS not(P:0.537),with logistic regression coefficient as 0.060 for WC.(4)The combination equation of male's BMI and WC Was CEBMI+WC=0.726 × BMI+0.274 × WC,with the optimum cut-off value as 41.59,and the sensitivity and the specificity were 0.785 and 0.598,respectively．Conclusion Four major risk factors for cardiovascular diseases were often related to obesity while control of BMI and WC were of great significance to the primary prevention of cardiovascular disease．The combined equation of BMI and WC could be used to predict the risk of clustering.

Objective To explore the relationship between the endemic arsenism and the liver,renal damage.Methods Some permanent residents were selected as investigated subjects who lived at 3 villages in Datong in Shanxi Province,an arseniasis-endemic areas,These objects were divided into arsenic poisoning and control group on the basis of Diagnosis Standard for Endemic Arsenism(WS/T 211-2001).Then blood and urine samples were collected in the surveyed people.Serum glutamate pyruvic transaminase(ALT)were detected by Enzyme-linked immunosorbent assay as the indicator of the impaired hepatic function.The microdosis albumen (mAlb)and acetylglucosaminidase(NAG)in urine were detected by end-point method and alkaline picric acid as the renal damage indicators.Results A total of 661 people investigated,of which 144 cases were arsenic poisoning patients.The rates of abnormal liver function were significant hisher in arsenic poisoning group[10.42% (15/144)]than that in control[5.22%(27/517)],and both wag significant[X2=5.107,P＜0.05;OR=2.11,95%CI (1.09-4.08)].The geometric mean of mAlb/Ucr was 2.16 mg/g Cr in control,and 2.31 mg/g Cr in arsenic poisoning group,and both was not significant(t=-1.71,P＞0.05).The geometric mean of NAG waft higher in arsenic poisoning group(2.43 U/g Cr)than that in the control(2.22 U/g Cr),and both was significant(t=-3.55, P＜0.05).Conclusions The damage of the liver and renal function were related with endemic arsenism,and NAG is the early indicators suggesting impaired renal function due to endemic arsenism.