BACKGROUND:It has been recently indicated that nervous factors are able to adjust and dominate bone fracture healing. Type Ⅰ collagen is a major factor to promote the differentiation of osteoblasts and enhance the adhesion of osteoblasts; while, it is also a matrix protein for composing bone framework. Type Ⅱ collagen is derived from chondrocytes. OBJECTIVE: To study changing law of type Ⅰ and Ⅱ collagen expression during denervated bone fracture healing. DESIGN, TIME AND SETTING: Randomized controlled anima study was performed at the Animal Laboratory and Cell Biology Laboratory, the Second Military Medical University of Chinese PLA between May and December 2005. MATERIALS: Forty 3-month-year healthy male SD rats were randomly divided into fracture group (tibial fracture alone) and combination group (spinal cord injury combined with tibial fracture), with 20 rats at each group. METHODS: A φ 0.8 mm Kirschner wire was inserted into anterior border of left tibial plateau to establish tibial fracture models in the fracture group. A 0.3-cm spinal cord transection was cut at T10 segment to establish tibial fracture models with entire spinal cord injury. MAIN OUTCOME MEASRUES: Type Ⅰ and Ⅱ collagen protein expressions of callus were detected using Western blot technique in week 1, 2, 4, and 5 post-injury. RESULTS: One week after injury, type Ⅰ and Ⅱ collagen was represented in callus in the two groups, while the expressions in the combination group were significantly higher than fracture group (P<0.05); two weeks after injury, type Ⅱ collagen expression reached at the peak in the combination group, and the expression was significantly higher than the fracture group (P<0.05); four weeks after injury, type Ⅰ collagen expression reached at the peak in the fracture group, and the expression was significantly higher than the combination group (P<0.05), while type Ⅱ collagen still highly expressed in the combination group; five weeks after injury, type Ⅰ and Ⅱ collagen expressions were decreased in the two groups. CONCLUSION: Secretory law of type Ⅰ and Ⅱ collagen during denervated bone fracture healing is similar to normal bone fracture healing; however, the differences at time points, in particular expression at peak, are remarkable between them.

ObjectiveTo observe the curative effect of Xiangshaliujunzi decoction on critically ill patients with gastrointestinal dysfunction accompanied by spleen deficiency syndrome of traditional Chinese medicine (TCM) and its influence on tumor necrosis factor-α(TNF-α) and interleukin-6 (IL-6).Methods Forty-eight critically ill patients admitted to Department of Emergency Intensive Care Unit (EICU) in Zhejiang Provincal Hospital of Traditional Chinese Medicine Xiasha Campus from February to December 2015 were enrolled, and they were randomly divided into observation group (26 cases) and control group (22 cases) by random number table method. The patients in both groups were given routine emergency western therapy, and in the observation group, additionally, Xiangshaliujunzi decoction (ingredients: codonopsis pilosula 20 g, atractylodes macrocephala koidz 12 g, poria cocos 12 g, radix glycyrrhizae preparata 4 g, rhizoma pinelliae preparatum 6 g, pericarpium citri reticulatae 5 g, fructus amomi villosi 5 g, radix aucklandiae 4 g, rhizoma zingiberis recens 3 pieces) 80 mL was prepared and divided into two parts for nasal feeding, once 40 mL, twice a day, while the patients in the control group received the nasal feeding with the same amount of warm boiled water. Before treatment and 3 days and 5 days after treatment, the gastrointestinal function scores were assessed, and the changes of the levels of plasma TNF-α, IL-6 were recorded.Results There were no statistical significant differences in gastrointestinal function scores, the levels of TNF-α and IL-6 between the two groups before treatment and 3 days after treatment (allP ﹥ 0.05). But 5 days after the treatment, the gastrointestinal function scores, the levels of TNF-α and IL-6 were obviously decreased in two groups, and the degree of decrease in observation group was more significant [gastrointestinal function score: 0.92±0.85 vs. 2.27±0.77, TNF-α (ng/L): 17.7±2.4 vs. 25.0±4.2, IL-6 (ng/L): 16.9±2.4 vs. 25.0±3.4, allP < 0.01].Conclusion Xiangshaliujunzi decoction has therapeutic effect on critically ill patients with gastrointestinal dysfunction and accompanied by spleen deficiency in TCM, the mechanism may be related to decreasing the levels of TNF-α and IL-6, thereby depressing the inflammation.

Objective To investigate the clinical values of Gemstone Spectral Imaging coronary angiography with analysis of the relationship between plaque character and angina pectoris types.Methods Two hundred cases of hospitalized patients were collected from January 2015 to December 2016 in the Department of Cardiovascular Disease,Chenzhou City First People's Hospital,who were diagnosed as coronary heart disease.According to the clinical data,stable angina pectoris (SA) and unstable angina pectoris (UA),coronary CT scan was performed for each patient to evaluate the relationship between the nature of atherosclerotic plaques and the classification of angina pectoris.SPSS 19.0 software was used for statistical analysis.Results By analyzing the correlation between SA and UA,SA calcification plaque was accounted for 63.2％,soft plaque 17.4％,mixed plaque 19.4％;UA calcification plaque was accounted for 37.5％;Soft plaque was accounted for 42.3％;and mixed plate was accounted for 20.2％.The difference was statistically significant (P ＜ 0.05).In the SA group,all of the stenotic lesions were mainly calcified plaques.There was no significant difference in the degree of severe stenosis between the different plaques in the SA group (P ＞ 0.05).In UA group,soft plaques were the main lesion of mild and moderate stenosis of coronary artery,and calcified plaques were the main stenosis in severe stenosis.There were significant differences in the degree of coronary artery stenosis between different plaques in UA group (P ＜ O.05).Conclusions The 128-slice spiral CT can accurately evaluated the relationship between the nature of coronary plaque and the type of angina pectoris,which is of great value in the early warning and angina pectoris classification of high-risk patients with coronary heart disease.

Objective To study the material attribute of articular cartilage.Methods An improved 4 parameters inhomogeneous triphasic model based on 3 parameters model was developed to estimate the uniaxial modulus Ha of cartilage and to predict the swelling pattern of cartilage.Results The results showed that more accurate uniaxial modulus can be extracted using 4 parameters inhomogeneous triphasic model,and the predicted results appeared to match the experimental strain data better than other models.Conclusion Inhomogeneous 4 parameters triphasic model can describe the depth-dependent material attribute of articular cartilage more exactly.

Objective To investigate the prognostic factors for chronic heart failure and the prognostic ability of copeptin,big endothelin-1(Big ET-1)and N-terminal pro-brain natriuretic peptide (NT-proBNP)in patients with chronic heart failure. Methods To study 1 5 9 consecutive patients hospitalized for chronic heart failure.Serum concentration of copeptin,NT-proBNP,cTnI,CKMB and plasma Big ET-1 as well as left ventricular ejection fraction (LVEF)and NYHA classⅠtoⅣ on admission were measured.Cardiac events were found by patients to discharge after 360~490 days,prospectively.Results During a median follow-up period of 385 days,the endpoint of recurrence for cardiac events was reached in 65 patients with 159 heart failure.Multivarlate canonical correlation analysis shows the older and the higher NYHA classification as well as the lower LVEF in patients with heart failure.There were higher concentration of copeptin,Big ET-1 and NT-proBNP.On a Cox proportional hazards regression models analyses,age,copeptin,Big ET-1 and NT-proBNP were found to be the inde-pendent predictors of cardiac events.Risk ratio (RR)were 1.215,1.236,4.031 and 13.052,respectively.Logistic regression models analyses,copeptin,Big ET-1 and NT-proBNP were found independent predictors of death.Odd ratio (OR)were 4.003,2.477 and 1.235,respectively.Conclusion Measurement of copeptin,Big ET-1 and NT-proBNP in patients with chronic heart failure can help to identify patients at higher risk for cardiac events and patients for prognosis.

Objective To study the life style and the status of nutrition knowledge for the children of Pinggu district of Beijing,and to provide evidences for targeted education and guidance.Method Using cluster sampling method,15 118 pupils aged 7-13 yeas in Pinggu district of Beijing were investigated for their nutrition knowledge,sports and diet habits using the questionnaire investigation method.The children at grades 1-3 were defined as the junior group,those at grades 4-6 were defined as the senior group,all pupils were divided into urban and rural groups according to the distance to pinggu district town center.The Excel 2003 was used for databases.The status was analysed using SPSS13.0 statistical software.Chi-square test wcs used for comparing categorical data.Result Totally 13 192 questionnaires were returned,accouting for 87.26％; 11 364 of them were valid,accouting for 75.17％.The awareness rates about the fruits and vegetables which are rich in nutrients,the food rich in calcium,the food rich in protein,nutrient deficiency anemia was relatively low,they were respectively 58.33％,62.72％,58.83％,43.18％; the awareness rates on the relationship between diet and health,effects of obesity on the health,excessive dringking is harmful and eating more salt was harmful,were relatively high:88.82％,92.33％,94.27％,and 83.74％,the differences between gender,grade,area and students' awareness of the comparison,were statistically significant (P＜0.05).The awareness rate of the question about what is dietary pyramid was 18.77％,the differences between different gender and grade were statistically significant (P＜ 0.01).The questionnaire of eating habits:the students who do not or occasionally have breakfast accounted for 14.84％; the rate of three meals which were irregular accounted for 14.46％; children who do not like to eat grains,vegetables and fruit,respectively accounted for 18.59％,21.61％,4.23％; the number of children who do not like to drink milk and eat soy products was high,the proportion was 38.52％ and 60.17％.At the same time the differences in time between sex,grade,areas,were statistically significant (P＜0.05).The questionnaire about movement and sleeping habits:the students who like walking,playing,climbing and other way to relax after class accouted for 59.94％,the exercise time was 30 minutes or more accounted for 40.99％,51.14％; students who ride bike or walk to school,children who ensure 9-10 hours for sleeping every day accounted for 84.86％,differences between different sex,area and grade were statistically significant (P＜0.01).Conclusion The children in this district generally had lack of the nutrition knowledge.There were many bad diet habits,while sport habits were also poor.In order to improve diet and sport habits of rural school children,we should do targeted nutrition and health education to children.

Objective: To establish a microwave digestion-inductively coupled plasma mass spectrometry assay for simultaneous determination of multiple elements in placenta. Methods: Fresh placental tissues were dried at 60 ℃ for 15 h and ground into power. Then, 0.3 g homogenized samples were digested in a microwave digestion system. The interference from mass spectrometry was removed using the kinetic energy discrimination model in the inductively coupled plasma mass spectrometry, and the baseline interference was removed by online internal standards. The contents of 17 elements were determined in placental specimens using the established microwave digestion -inductively coupled plasma mass spectrometry assay, including V, Ni, Co, Fe, Cr, Cu, Zn, Mn, As, Sn, Sb, Ba, Se, Cd, Pb, Hg and Tl. Results: Good linearity was shown for V, Ni, Co, Cr, As, Se, Cd, Pb and Tl at 1 to 50 µg/L, Fe at 100 to 5 000 µg/L, Zn, Cu, Mn and Ba at 10 to 500 µg/L, Sn and Sb at 0.1 to 5 µg/L, and Hg at 0.2 to 2 µg/L, with all correlation coefficients of 0.999 8 and higher. The detection limits of these 17 elements ranged from 0.5 to 100 μg/kg, with relative standard deviations of 2.1% to 6.5%, and recovery rates of 83.3% to 110.0%. The determination results of 17 elements were all within the normal reference range defined in the certified reference materials of chicken (GBW10018). Conclusions The microwave digestion-inductively coupled plasma mass spectrometry established based on optimized pretreatments and mass spectrometry detection conditions, is feasible for simultaneous determination of multiple elements in placenta.

AIM: To investigate the levels of mRNA, protein of glucosylceramide synthase (GCS) and caspase 3 in the drug resistance induced by doxorubicin in human gallbladder carcinoma cell line GBC-SD, the effect of ceramide metabolism in this process was examined. METHODS: Human gallbladder carcinoma cell line GBC-SD was treated by doxorubicin at concentration of 200 ?g/L for 12 weeks (named GBC-SD12). Cytotoxicity, mRNA and protein of GCS were measured on 1st week, 4th week and 12th week by MTT assays, RT-PCR or Western blotting. The levels of caspase 3 were measured by spectrofluorometry. RESULTS: A 3.8-fold increase in drug resistance to doxorubicin in GBC-SD12 was observed. Up-regulation of GCS mRNA and protein were also detected in GBC-SD12 (P

Subtle changes in structure or composition can lead to degeneration of articular cartilage such as in osteoarthritis, so it is significant to study the materials attribute of the degenerating articular cartilage. A new transient ultrasonic technique was introduced into this study for measuring the swelling effects of the degenerated cartilage. The swelling-induced strain was calculated based on the measurement result, and then the uniaxial module of the articular cartilag was extracted using Narmoneva's triphasic model. The ultrasonic observation showed that the strains induced by the nonuniform swelling are depth-dependent, and the strains are small in the deep zone and big in the middle and surface zones. The uniaxial modulus also revealed that the cartilage in the deep zone (E1 = 12.20) is harder than that in surface zone (E2 = 0.15). These results suggest that the transient ultrasound technique accompanied by triphasic model provides a quantitative means to study the degeneration of articular cartilage.
Cartilage Diseases ; diagnostic imaging ; Cartilage, Articular ; diagnostic imaging ; physiopathology ; Computer Simulation ; Edema ; diagnostic imaging ; physiopathology ; Humans ; Models, Biological ; Osmotic Pressure ; Ultrasonography

Objective: To study the relationship between nutrition status and physical fitness in 8-10 year-old children in 3 cities, and to provide a scientific reference for improving physical condition of chidren of pre-school age. Methods: To investigate the weight, height and physical fitness (standing long jump, endurance running, rope skipping in one minute and sit-ups in one minute) of 1 384 children in grade four from 24 primary schools in Beijing, Changzhi, Urumchi in 2018. Evaluated overweight and obesity by using the standard of “Screening for Overweight and Obesity among School-age Children”. Then used mixed linear model to compare the physical fitness of students with different nutritional status and to analyze the relationship between BMI and physical fitness. Results: The prevalence of overweight and obesity were 17.41% and 23.48%, respectively. And the prevalence in boys was both more than that in girls(χ2=9.84，47.68，P<0.01). The increase in BMI of children from the same age and the same gender was related with the decrease in physical fitness by correlation analysis(P<0.05). In comparison method, the performance of the students of normal weight was better than obese students, but the male and female students had got the same results in their physical fitness test(P<0.05). Conclusion There is a negative correlation between nutrition status and physical fitness and the physical fitness in normal weight and obese children are better than the overweight children or obese children.