Aim The effect and mechanism of human placental extract(HPE) on the lipoprotein-cholesterol metabolism, peroxidation and the function of platelet aggregation in hyperlipaemia rats were abserved.Methods Wistar rat with hyperlipaemia models were given each HPE 0.4 ml (100 g)-1?d-1 through lavage for 12 days.The serum levels of TG,TC,LDL-C,HDL-C and HDL2-C in its subgroup were measured.The activies of LPO and SOD in both blood and liver tissue were determined .The effect of HPE on lipidosis of liver were abserved by fat dyeing.The levels of 6-keto-PGF1?,TXB2 in plasma and maximum platelet aggregation rate were measured by ELASA. Result The levels of HDL-C and HDL2-C were increased (P

OBJECTIVE To study the antimicrobial activity of antimicrobial plastics and its depressing effect to biofilm on the plastics′s surface. METHODS Test tube dilution method was adopted to study the antimicrobial activity and spectrum of antimicrobial plastics. Plate live bacterial recording method and scanning electron microscope(SEM) were introduced to study the formation of biofilm. RESULTS Wide inhibiting spectrum to pathogenic microbe such as Pseudomonas aeruginosa,Staphylococcus aureus,and Escherichia coli was confirmed,and the biofilm was formed after four stages,ie deposit,adhesion,propagation and biofilm formation,and propagation of microbe was found to be inhibited greatly in the surface of antimicrobial plastics,so that the formation of biofilm in the surface of antimicrobial plastics was held back,and the observation of SEM also confirmed that no biofilm was formed in the antimicrobial plastics′s surface. CONCLUSIONS Antimicrobial plastics could inhibit pathogenic microbe remarkably with wide inhibiting spectrum,and it could also depress the formation of biofilm in the surface,which indicated that it is a promising approach to prevent catheter related infections by adopting antimicrobial catheters.

PURPOSE: This study was designed to identify the degree of self-image and social support among Korean-Chinese adolescents and investigate the relationship between these variables. METHOD: A total of 621 Korean-Chinese adolescents in five middle schools in YanBian, China were recruited from March 1st to the 9th, 2005. Data was analysed using descriptive statistics, Pearson correlation coefficient, t-test, and ANOVA with the SPSS 11.5 program. RESULT: In Korean-Chinese adolescents, the total self-image score was statistically different for age, parents' education status, parents' job and living with parents. In the 12 subscales, scoresof emotional tone, impulse control, sexuality, social functioning, vocational attitudes and self-reliance had significant differences between groups regarding gender. The total self-image was in the average range. However, areas of mental health and family function were lower than average and the scale of idealism washigher than average. The adolescents perceived parent's support was higher then friend's support. There was a positive correlation between self-image and social support. CONCLUSION: The findings suggest there is a need to examine self-image and social support of Korean- Chinese adolescents according to their parents' marital status and a need to develop a program to help these broken family's adolescents.
Socioeconomic Factors ; *Social Support ; *Self Concept ; Male ; Korea ; Humans ; Female ; Family ; China/ethnology ; Child ; *Adolescent Psychology ; Adolescent

Objective: To study the clinical therapeutic characteristics of myasthenia gravis (MG) with hyperthyroidism and the effects of surgical procedures for the patients. Methods:Subtotal thyroidectomy,thymectomy,and simultaneous subtotal thyroidectomy and thymectomywere performed on eleven patients with MG and hyperthyroidism. These patients were followedup after the operation. Results :The neck incisions were infected in two of seven type Ⅱ b patientsdue to trachestomy and the infected incisions were surgically healed. The MG symptoms of threecases (1 cases in type Ⅱ. and 2 cases in type Ⅱ b) relapsed in 3 to 6 months after subtotal thy-roidectomy. The MG symptoms of 2 cases (1 case in type Ⅱa and 1 case in type Ⅱ b) relapsed in 8to 12 months after thymectomy. Among six patients treated by simultaneous subtotal thyroidecto-my and thymectomy,the MG symptoms relapsed in a type I case 3 months after the operation,remitted in three case (1 case in type Ⅱ, and 2 cases in type Ⅱb) and improved in two type Ⅱ bcases since the operations. Conclusion:The simultaneous subtotal thymectomy and thyroidectomyfor patients with MG and hyperthyroidism might have better effects,although infective opportuni-ty of the neck incisions increased owing to trachestomy. However,the prognostic effects were notvery satisfactory whether simple subtotal thyroidectomy or thymectomy for the patients with MGand hyperthyroidism was performed.

Objective To measure the angular velocity and perpendicular ground reaction force of the ankle joint under different heights with half-squat jumping in parachute training simulation,providing a reliable experiment basis for the preventing of ankle injury.Methods A total of 18 volunteers participated in this study.The experimental group included 9 male with experience of parachute landing,while the other 9 male without experience of parachute landing were assigned to the control group.Each subject was instructed to jump off a platform with a height of 30 cm and 60 cm and land on a hard surface in a half-squat posture.The dynamic landing process was recorded with a high speed camera and the biomechanical data was collected and analyzed,including perpendicular ground reaction force,angular displacement,velocity and acting time.Results From 30 cm's height,the ankle angular displacement of the control group was significantly larger than the experimental group (25.73°± 8.13° vs 20.05°± 12.27°,P ＜ 0.05).The perpendicular ground reaction force of the control group was significantly smaller than the experimental group (3 372.4±748.6 N vs 5 181.5±1 726.2 N,P ＜ 0.05).The acting time of the control group was significantly longer than the ex perimental group (0.049±0.015 s vs 0.012±0.004 s,P ＜ 0.05).The buffer time of the control group was significantly shorter than the experimental group (1.397±0.746 s vs 1.737±0.451 s,P ＜ 0.05).From 60 cm's height,the ankle angular velocity of the control group was significantly higher than the experimental group (25.45± 15.01 °/s vs 16.51 ±4.18 °/s,P ＜ 0.05).The perpendicular ground reaction force of the control group was significantly smaller than the experimental group (4 616.0±1 124.7 N vs 7 119.5±2 307.4 N,P ＜ 0.05).The acting time of the control group was significantly longer than the experimental group (0.048±0.013 s vs 0.015±0.006 s,P ＜ 0.05).The buffer time of the control group was significantly shorter than the experimental group (0.922±0.347 s vs 1.617±0.547 s,P ＜ 0.05).Conclusion Jumping from different heights,the experinental group was larger in perpendicular ground reaction force but smaller in the angular velocity and displacement than the control group.There was a shorter acting time and a longer buffer time in the experimental group than the control group.

Objective To investigate the effect of immediate and delayed post space preparation on the integrity of the apical seal.Methods Seventy extracted human single-rooted human teeth were biomechanically prepared using the step-back technique.They were randomly assigned to 2 experimental groups of 35 teeth each and filled with two root canal sealants (AHplus and Cortisomol) separately.Thirty teeth in each group were prepared and the other five served as negative controls.Apical microleakage was evaluated with ink dye penetration.Results Cortisomol group showed better apical sealing effect than did other groups when teeth were prepared immediatlly,and microleakage values showed no statistically significant difference ( P ＞ 0.05 ),Vitapex group generated more microleakage than did the other Two groups with delayed preparation ( 2.03 ± 0.33 mm),the difference was statistically significant ( P ＜ 0.05 ).Cortisomol group had a greater microleakage than other groups did when prepared immediately,but the difference was not statistically significant.The other two groups showed significantly greater microleakage with delayed preparation than they did with immediate preparation group ( P ＜ 0.05 ).Conclusions Immediate post space preparation creates less microleakage than delayed preparation does.

Animals ; Disease Progression ; Kidney Diseases ; physiopathology ; Kidney Glomerulus ; drug effects ; pathology ; Rats ; Renal Agents ; pharmacology ; Renin-Angiotensin System ; drug effects ; Sclerosis

Objective To evaluate the applications of magnetic resonance cholangiopancreatography (MRCP) after fat meal in the preoperative evaluation of biliary anatomy of living liver donors.Methods Fifty cases of the preoperative donors for living liver transplantation were included and all had the corresponding intraoperative cholangiography (IOC) information. The MRCP of the donors for living liver transplantation was performed before and after fat meal (two fried eggs). The visualization and diameter of the secondary bile duct were analyzed before and after the fat meal. The results of the biliary branching pattern by MRCP after fat meal were compared with the corresponding IOC results. The accuracy, sensitivity,specificity, positive predictive value and negative predictive value of MRCP after the fat meal in distinguishing normal and any type of variant biliary anatomy were calculated. Results In all cases,82% of the 50 cases in MRCP before the fat meal could meet the diagnosis needs of the preoperative evaluation,and 100% of the 50 cases in MRCP after the fat meal could meet the diagnosis needs. There was significant difference in the demonstration quality and diameter of the secondary bile duct in MRCP before and after the fat meal (P＜0. 05). MRCP showed accurate anatomy of the biliary system, using IOC as the reference standard, in 49(98%) subjects. The sensitivity, specificity, positive predictive value and negative predictive value of MRC in distinguishing normal and any type of variant biliary anatomy were 98%,94. 7%, 100%, 10% and 96. 9%,respectively. Conclusion The MRCP after fat meal can clearly demonstrate the secondary bile duct and perfectly meet the needs of the preoperative evaluation of the living liver transplantation. The MRCP after fat meal and routine MRCP should be considered complementary to one another in order to avoid complications in living liver transplantation donors.

Objective This study is to investigate the set-up accuracy of thermoplastic mask used for immobilization of nasopharyngeal carcinoma (NPC) patients being treated by Intensity Modulated Radia- tion Therapy (IMRT).Methods Nineteen patients with early stage nasopharyngeal carcinoma (T1- T2N0M0),treated by fractionated intensity-modulated radiation therapy,underwent repeated CTs during their 6-week treatment course.We evaluated their anatomic landmark coordinates in a total of 85 repeated CT data sets and respective x,y and z shifts relative to their position in the 19 treatment-planning reference CTs.Results The translation in x,y,and z-axes with their mean value derived from both positive and negative set-up errors was-0.84 mm(x-axis),+0.65 mm(y-axis) and +0.01 mm(z-axis).Mean target isocenter translation was (0.89?0.69) mm,(0.82?0.79) mm,(0.95?1.24) mm in x,y and z-direc- tions,respectively.The mean total magnitude vector and 95% CI of isocenter motion were 1.87 mm and 4.65 mm.The data measured over the 6-week fractionated course of treatment revealed a slight deterioration of isocenter accuracy.The 95% CI,considered by us to be a valuable parameter for characterizing the sys- tem,of 4.17 mm for measurement within the first 3 weeks increased to 5.12 mm in the last 3 weeks of treat- ment.Conclusions The sequential CT scanning is a pronounced valuable method of evaluating the quality of departmental specific patient positioning procedures.The thermoplastic mask is eyed as well suited tool for immobilization and repositioning of NPC patients receiving intensity-modulated radiation therapy.

OBJECTIVETo detect the expression of fibroblast activation protein(FAP) in colorectal cancer tissue, and to investigate the association between expression of FAP with pathological parameters.

METHODSFifty-five cancer tissues and 50 normal colorectal samples were examined using immunohistochemistry with anti-FAP polyclonal antibody. The distribution of positive cells in different tissues, and associations of positive cell number with tumor staging, lymph node metastasis and tumor invasion were investigated to evaluate the effects of FAP on pathological progress in colorectal cancer.

RESULTSNo FAP expression was observed in 50 normal colorectal tissue samples. FAP positive cells were seen in carcinoma associated fibroblasts(CAFs), and in few colorectal cancer cells. The numbers of FAP positive cells in tissue samples of TNM III(-IIII((40.1±15.9) was significantly greater than that of TNMI(-II( (18.3±7.7)(P<0.01). Furthermore, the number of FAP positive cells in tissue samples with lymph node metastasis (44.4±13.3) was also significantly higher than those without lymph node metastasis (18.5±8.1)(P<0.01). Significant positive correlations were found between the number of FAP-positive cells with the tumor TNM staging and lymph node metastasis(r=0.544 and r=0.793, respectively)(P<0.01). The number of FAP-positive cells was 25.2±8.9 in T2, 32.41±19.30 in T3, and 29.2±16.5 in T4. The association between number of positive cells and depth of invasion was not statistically significant(P>0.05).

CONCLUSIONSThe FAP mainly expresses in CAFs locating in colorectal cancer tissues. The number of FAP positive cells is positively correlated with TNM staging of colorectal cancer and lymph node metastasis.

Adult ; Aged ; Aged, 80 and over ; Case-Control Studies ; Colorectal Neoplasms ; metabolism ; pathology ; Female ; Gelatinases ; metabolism ; Humans ; Lymphatic Metastasis ; Male ; Membrane Proteins ; metabolism ; Middle Aged ; Serine Endopeptidases ; metabolism