Objective To investigate the effect of isochlorogenic acid B(ICAB)on CCl4-induced acute liver injury(ALI)in mice. Methods The animal model of CCl4-induced ALI in mice was established and then the protective effect of ICAB was evaluated using this model. Serum levels of alanine transaminase(ALT)and aspartate aminotransferase(AST),hepatic levels of malondialdehyde (MDA)and the activities of superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)were measured by spectrophotometric methods. Liver cell morphology was observed by hematoxylin and eosin staining method and the effects of ICAB on the protein expres-sion of nuclear factor erythroid-2-related factor 2(Nrf2),heme oxygenase-1(HO-1)and quinone oxidoreductase 1(NQO1)in mice he-patocyte were determined by Western blot method. Results ICAB(5,10 and 20 mg/kg)significantly protected against CCl4-induced liver injury by reducing the elevated levels of serum aminotransferases and hepatic MDA and remarkably restored the impaired antioxi-dants. Meanwhile,the histopathological changes were also attenuated in mice. In addition,ICAB could induce the protein expression of Nrf2 and promote its nuclear translocation,and further increase the protein expression of HO-1 and NQO1. Conclusion ICAB has protective effect against CCl4-induced ALI in mice,which is mainly due to its ability to promote the nuclear translocation of Nrf2 and decrease the oxidative stress.

Objective: To assess the status of the interpersonal relationship of the current college students.Method: Approximately 456 students were tested with the interpersonal relationship of the current college students questionary.Result: In factor scores of associate attitude there existed the significant differences between south and north,low grade and high grade.In campus interpersonal atmosphere,the significant differences existed between students of poverty and students of impoverty.In the teacher and student relationship the significant differences existed between low grade and high grade,students of poverty and students of impoverty,singleton and insingleton.Conclusion: The interpersonal relationship of the college students is very important to students and the psychological education of interpersonal relationship should be conducted.

Neoplastic stem cells (NSCs)are the source of tumor occurrence and development,and its special microenvironment is involved in tumor drug resistance,recurrence and metastasis by regulating NSCs or changing itself. Eradicating NSCs and interfering the special microenvironment may be the new therapeutic strategies for cancer.

Objective To analyze the clinical characters,therapeutic effect of gastrointestinal stromal tumors (GIST),the effects of surgical approach and imatinib adjuvant therapy on it.Methods From January 2004 to April 2010,the clinical data of 214 patients with primary GIST were retrospectively analyzed.The effects of surgical approach and imatinib on the survival of the GIST patients were compared.Count data were analyzed by chi-square test,and the survival rates were analyzed with the life table method and Kaplan-Meier curve.Results A total of 214 GIST patients'survival rates of 1-year,3-year,5-year were 93.0％,87.0％ and 80.0％.According to the risk classification of National Institutes of Health,the differences of overall survival rates after surgery were statistically significant (x2 =22.058,P＜0.05).The differences of survival rate among different nuclear division number were statistically significant (x2=26.599,P＜0.05).The survival rate of pathological nuclear division number over 10/50 high power field (HPF) was the lowest.The overall survival rate of patients with gastrointestinal GIST was higher than patients with extragastrointestinal GIST,and the difference was statistically significant (x2 =68.139,P ＜ 0.05).After complete resection of the tumor,the survival rate of patients with local recurrence was higher than those with widely recurrence,and the difference was statistically significant (x2 =4.409,P＜ 0.05).After complete resection of the tumor,the survival rate of patients taking imatinib was higher than that of patients not taking imatinib.Conclusions The surgical treatment was the main therapy for GIST.Complete resection of the tumor and taking imatinib after surgery could improve the prognosis and the survival rate of the GIST patients.

The effects of electrical and chemical stimulation of the vertral medial area of nucleus facialis (vMNF) on the myoelectric activities of genioglossus were observed in 26 urethane-anaesthetized and vagotomized rabbits. The results are as follows: (1) Long train electrical stimulation at the vMNF inhibitited the myoelectric activities of genioglossus markedly. (2) Microinjection of glutamate into the vMNF caused inhibitory response of the myoelectric activities of genioglossus. (3) When single pulse electrical stimulation on vMNF, measurement latency of genioglossus myoelectric activities was (20.6±0.4)ms. These results suggested that the excitation of vMNF could decrease the myoelectric activities of genioglossus so that the resistance of upper airway might be enhanced.

Objective To observe the clinical efficacy of breeze heat treatment with site blood circulation for abdominal purpura allergic acupoint application therapy. Methods 96 patients were randomly divided into treatment and control group ,with 48 people in each. Both groups received traditional Chinese medicine with conventional therapy. Control group was given oral medicine treatment and acupoint application while the treatment group was given enema treatment. Clinical parameters observed includes degree of symptoms released ,the number of days in hospital and laboratory test results. Results The number of days in treatment group and hospital stay significantly decreased compared with control group (P<0.05). In terms of laboratory tests,the degree of improve?ment of the treatment group than the control group was statistically significant (P<0.05). Conclusions Treatment of dispersing heat blood circulation acupoint sticking with the treatment for abdominal type allergic purpura can sig?nificantly improve symptoms and laboratory tests ,with no obvious adverse reactions.

Objective:The pathogenesis of placental vascular disease(PVD) was further investigated. Methode:PVD group (study group) and normal pregnancy (control group) were recruited. Two-channel mi-croarray technique was applied to screen the most differently expressive genes of human genome, and veri-fied the different expressions in mRNA and protein levels by quantitative PCR and Westem-blot, also local-ized the expression of different genes in placental tissue by immunohistochemistry. Reeults:HspA6 and Hs-pA1A had extremely higher expression in placentas with PVD than normal pregnancy. These genes both en-coded Hsp70. Hsp70 was mostly expressed in endothelial and smooth muscle cells of placental microves-ssls. The expression of Hsp70 mRNA and protein were up-regulated in placental tissue and microvascular endothelial cells from PVD group compared with normal pregnancy ( P <0.05) ;The expression of Hsp70 mR-NA and protein had negative correlation with infant birth weight ( P < 0.05). Conclueione:Hsp70 was associ-ated with endothelial activation in the pathogenesis of PVD by initiating an innate immune response and in-flammatory reaction.

Objective To investigate the differences of the plasma homocysteine (Hcy) between the patients with acute cerebral infarction and the normal controls, and the relationship between the levels of plasma Hcy and folic acid, vitamin B_(12) and lipids, and the relationship between clinical symptoms in patients with acute cerebral infarction. Methods A total of 91 patients with first-ever acute cerebral infarction and 100 controls without cerebrovascular accident were included. Their ratio factors such as age, sex, hypertension and diabetes did not have significant differences. Enzymatic cycling was used to detect plasma Hcy levels. Chemiluminescence was use to detect folic acid and vitamin B_(12) levels. Biochemical analyzer was used to measure lipid levels. The patients with acute cerebral infarction were evaluated by the National Institutes of Health Stroke Scale (NIHSS). Results The plasma Hcy level was significant higher in the acute cerebral infarction group than that in the control group (21.22 ±7.29 μmol/L vs. 13.19 ± 2.13 μmol/L) (P ＜ 0.05); the plasma Hcy level in the acute cerebral infarction group was significantly negatively correlated with folic acid (r = - 0.307,P ＜0.05) and vitamin B_(12) (r = - 0.270, P ＜0.05). It was significantly positively correlated with low-density lipoprotein (r =0.282, P ＜0.05), and it was significantly negatively correlated with high-density lipoprotein (r = -0.219, P ＜0.05). The mean value of the plasma Hcy in acute cerebral infarction group increased with the increase of NIHSS scores. Conclusions Hyperhomocysteinemia is an independent risk factor for acute cerebral infarction. The levels of folic acid and vitamin B_(12) decreased with the increase of Hcy levels. The higher the Hcy levels,the more serious the clinical symptoms are. Hcy may increase the risk of ischemic cerebrovascular disease by influencing the lipid metabolism.

BACKGROUND:To optimize the oral implant design in the abutment angle has an important effect on bone resorption, and meanwhile, the high bite force from patients is also crucial to rebuild bone absorption.
OBJECTIVE:To optimize the model design of the maxilary anterior teeth using Ansys Workbench 13.0 software and to investigate the stress size on the cortical and cancelous bone from different angled abutments and different loads of the central incisor.
METHODS:A three-dimensional finite element model of the V-shaped cylindrical threaded implants in the maxilary bone. Abutment angle was set as 0°, 5°, 10°, 15°, 20°, 25°, 30°, and the load stress was set as 90, 105, 120, 135, 150, 165, 180, 195, 210 N. Occlusion of the central incisor was simulated on the implants, and then, buccolingual mechanical loads were loaded on the center of prostheses to observe the effects of different abutment angles and loads on the Von Mises peak stress of the maxila and mandible.
RESULTS AND CONCLUSION:Under the influence of a single factor, when the abutment angles acted as variables, the Von Mises peak stress of the cortical and cancelous bone was respectively increased by 60.60% and 69.30% under labial or palatal loads; when the loading stress acted as variables, the Von Mises peak stress of the cortical and cancelous bone was increased by 68.74% and 69.30% under buccolingual loads. When the loading stress was less than 150 N and the abutment angle was less than 25°, the slop of tangent for the mandible Von Mises stress response curve was-1 to 0. It seems from the mechanical analysis that the stress of cancelous bone is more susceptible to abutment angle and load stress; the optimal abutment of screwed implant should be designed to an angle less than 25° and an bite force less than 150 N.

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