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OBJECTIVE To explore the mechanism of Cirsium japonicum extract in improving hypercholesterolemia based on metabolomics technology. METHODS The extract of C. japonicum was prepared by macroporous resin adsorption， and its main components were identified by liquid chromatography-tandem mass spectrometry. The experimental mice were randomly divided into control group （n＝6） and modeling group （n＝16）. The hypercholesterolemia model was induced by diet in modeling group； after modeling， the rats of modeling group were divided into model group （n＝8） and C. japonicum extract group （n＝8）. C. japonicum extract group was given C. japonicum extract 400 mg/（kg·d） by gavage （calculated by extract）， and other 2 groups were given constant volume of 0.3% sodium carboxymethyl cellulose solution， for 6 weeks. After medication， the intervention effect of C. japonicum extract was evaluated by the levels of serum total cholesterol （TC）， triglyceride （TG） and the histopathological changes of liver. The mechanism of C. japonicum extract in improving hypercholesterolemia model mice was investigated by metabolomics. RESULTS It was identified that C. japonicum extract contained 12 components， such as 030302005） chlorogenic acid， linarin and pectolinarin. After 6 weeks of intervention， compared with control group， serum level of TC was increased significantly while the level of TG was decreased significantly in model group （P＜0.05）， while a large number of lipid droplets， disorderly arrangement of liver cells and the damaged structure of liver cord were observed in liver tissue. Compared with model group， the serum level of TC was decreased significantly in C. japonicum extract group（P＜0.05）； the lipid droplets in liver tissue were significantly reduced， with liver cells arranged radially and tightly centered around the central vein， and liver cords arranged neatly. The metabolomics study showed that after the intervention of C. japonicum extract， the levels of metabolites were significantly adjusted back， such as ethanolamine， fumaric acid and cholesterol； finally， three metabolism pathways， such as alanine-aspartate-glutamic acid metabolism， arginine biosynthesis， citric acid cycle， were obtained. CONCLUSIONS The main components of C. japonicum extract are phenolic acids and flavonoids， such as chlorogenic acid， linarin， pectolinarin. C. japonicum extract can improve hypercholesterolemia by regulating the contents and distribution of differential metabolites， adjusting alanine-aspartate-glutamic acid metabolism， arginine biosynthesis and citric acid cycle， participating in oxidation-reduction reaction， improving liver lipid accumulation， and playing anti-inflammatory role.
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Objective@#To analyze the current situation and needs of primary and secondary school health clinic services, and to provide a reference for strengthening school health service in China.@*Methods@#Investigation provinces were selected according to China s three major economic zones, 1 or 2 survey centers were selected from each province, 16 provinces and 26 survey centers were selected. In each survey centers, six schools from primary and secondary schools, junior high schools and high schools in urban and rural areas were randomly selected as research sites. Each research site randomly selected 10 students in each grade(grade three, four, five from primary schools) to fill in the questionnaire anonymously. A total of 4 661 valid questionnaires were collected.@*Results@#Among the services provided by the school clinics to students, "trauma treatment" "consulting health problems" "physical examination" accounted for 49.4%, 40.5% and 39.0% respectively. Within the past one year, 45.1% students went to the school clinic for consultation or consultation 1-3 times, 6.4% for 4-5 times, and 3.7% for 6 times or more. When students were sick in school, 65.8%(primary school), 64.0%(junior high school), and 54.4%(high school) of them selected to go to the school clinic. When suddenly suffered trauma in school, 78.2%(primary school), 73.2%(junior high school) and 69.6%(high school) of the students went to the school clinic.@*Conclusion@#Primary and middle school students have a great demand for school health services, and it is necessary to continue to strengthen the construction of primary and secondary school health clinics.
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Objective To investigate the performances and characteristics of femoro-acetabular impingement (FAI)on MSCT. Methods Hips jointed MSCT scans of 109 cases (as case group)and the other 120 cases (as control group)were analyzed retrospec-tively,to analyze the anatomy and osseous abnomality of FAI.Alpha angle,offset,CE angle were measured.The data were tested by using t test and ANOVA test.Results There were 57 cases of osseous protuberance at the femoral head and neck joint,26 cases of the offset reduction,17 cases of over-coverage acetabulum,41 cases of over-deep acetabulum,20 cases of acetabular retroversion,57 cases of subcortical cystic degeneration at the femoral head and neck joint and 22 cases of subchondral cystic degeneration at the ace-tabulum margin.Significant statistical differences were found between case group and control group in alpha angle value,offset and CE angle (P<0.05).Multiple comparisons demonstrated that except results between the value of alpha angle of Cam-type and Mixed-type(P=0.071),Pincer-type and the control group(P=0.083)with no statistical significance,the differences between any other two groups reached statistical significance (P<0.05).Multiple comparisons demonstrated that except result between the value of offset of Cam-type and Mixed-type(P=0.561)with no statistical significance,the differences between any other two groups reached statistical significance (P<0.05).Multiple comparisons demonstrate that except results between the value of CE angle Pin-cer-type and Mixed-type (P=0.444),Cam-type and the control group (P=0.236)with no statistical significance,the differences be-tween any other two groups reached statistical significance (P<0.05).Conclusion Different type of FAI has its unique anatomical features.Alpha angle,offsetand CE angle for the diagnosis of FAI have important reference values.