objective: To investigate the effect of human serum albumin(HSA)on the attachment of human gingival epithelial cells(HGEs)to commercial pure titanium(cpTi).Methods: HGEs were cultured, the cells of passage 2～5 were seeded on to cpTi samples which were preincubated in keratinocyte serum free medium with 50 mg/ml HSA or without HSA. Cell attachment was studied by immunofluorescence analysis.Results: HGEs were cultured and identified by positive expression of cytokeratin. 4,12 and 24 h after seeding attached cells on HSA preincubated cpTi were 218,730 and 849, those on the control 417,745 and 864, respectively.Conclusion: The early stage of cell attachment of HGEs on to cpTi may be inhibited by HSA.

In pathological course teaching,multi-media teaching application has promoted pathology teaching tremendously,enriched pathology teaching connotation and widened the students'visual field.It also brings about some negative effect.By discussing the advantages and disadvantages of applying multi-media teaching to pathological mechanism teaching,we can serve the pathological mechanism teaching better.

Humans ; Occupational Health ; Refuse Disposal

AIM:Activin A,a member of transforming growth factor superfamily,is the negative regulator factor in liver regeneration. In this study,the effects of extract of Ginkgo Biloba on hepatic fibrosis and the expression of Activin A in rats with cirrhosis were investigated. METHODS:The experiment was performed at in the Central Laboratory of Wuhan First Hospital from September 2005 to December 2006. ①Thirty-six male SD rats of(160?20) g were randomized into 3 groups:control group,model group and treatment group. ② Except the rats in the control group,others were intraperitoneally injected with 500 mL/L CCl4 for 8 weeks to establish models of hepatic fibrosis. Meanwhile,the extract treatment group was infused with the extract of Ginkgo Biloba(Chinese drugs preparation laboratory of Wuhan First Hospital,detected by Hubeu Wushi Medicine Industry Co.,Ltd. No. 02-391) daily for 8 weeks. ③After administration,all anesthetized rats were sacrificed. Blood samples were collected for the determination of liver function biochemical indexes. Liver tissue samples were used for histopathological examinations. The expression of Activin A was determined by immunohistochemistry and RT-PCR. RESULTS:All 36 rats were involved in the final analysis. ①The liver function in extract treatment group was significantly improved compared with that in model group. ②The grade of fibrosis in extract treatment group were remarkably lower than that in model group under light microscope. ③The positive staining of Activin A in treatment group was significantly reduced compared with model group. ④The expression of Activin A mRNA in extract treatment group was significantly reduced compared with model group. CONCLUSION:Extract of Ginkgo Biloba can effectively decrease the expression of Activin A in rats with hepatic fibrosis caused by CCl4,and lessen the degree of hepatic fibrosis.

Objective To observe the effect of electromyographic biofeedback therapy and kinesitherapy on patients with radial nerve injury.Methods 82 patients with radial nerve injury were divided into control group (n=41) and treatment group (n=41). The control group was treated with medcine and acupuncture, while the treatment group received electromyographic biofeedback therapy and kinesitherapy in addition. The radial nerve function was assessed and analyzed by electromyogram (EMG) and motor conduction velocity (MCV) before and after treatment. Results After 12 weeks of treatment, limb motor function, EMG and MCV were better in the treatment group than in the control group (P<0.05). Conclusion Electromyographic biofeedback therapy and kinesitherapy can effectively improve the limb motor function of patients with radial nerve injury

OBJECTIVE To study the epidemiology of the drug-resistant genes in meticillin-resistant coagulase negative staphylococcus(MRCNS).METHODS mecA,aac(6′)/aph(2″) and aph(3′)-Ⅲgenes of aminoglycoside-modifying enzyme(AME) and ermA/B/C genes of erythromycin methyltransferase were detected by polymerase chain reaction(PCR) from 40 MRCNS strains.RESULTS Thirty-nine strains carried mecA gene,32 strains with aac(6′)/aph(2″) gene,15 strains with aph(3′)-Ⅲ gene,30 strains with ermA/B/C gene and 2 strains with tetM gene in 40 MRCNS strains.CONCLUSIONS About 65% MRCNS strains carry mecA,aac(6′)/aph(2″),/aph(3′)-Ⅲ and ermA/B/C genes at the same time.

Colorectal cancer is one of the most common malignant tumors of digestive system.There are significant differences between young patients and other ages in aspects of the disease features, biological characteristics, risk factors, clinical treatment and prognosis, etc.And the analysis of young colorectal cancer patients′ characteristics can provide new ideas for clinical treatment.

Objective:To determine the content of cyclohexane, ethyl acetate, methanol, methylene chloride and trichloromethane in rupatadine fumarate by headspace gaschromatography. Methods:A DB-WAXETRR capillary column(30 m × 0. 32 mm,0. 25 μm)was used and the carrier gas was nitrogen. The detector was an FID and the inlet temperature was 200℃ . The column temperature program was with the initial temperature of 35℃,maintained 10 min,and then risen to 220℃ with the rate of 20℃·min -1 ,and maintained 5 min. Results:Cyclohexane,ethyl acetate,methanol,methylene chloride and trichloromethane showed a good linear relationship within the range of 77. 590 1- 698. 310 9 μg·ml -1(r = 0. 999 7),102. 166 6- 919. 499 4 μg· ml -1(r = 0. 999 8),62. 744 7- 564. 703 2μg·ml -1(r = 0. 999 9),12. 011 2- 108. 101 1 μg·ml-1(r = 0. 999 6)and 1. 262 8-11. 365 6 μg·ml -1(r = 0. 999 6). The average recovery was 103. 9% ,103. 5% ,104. 9% ,107. 1% and 103. 4% and RSD was 2. 3% ,2. 6% ,3. 1% ,2. 8% and 4. 5%(n = 9),respectively. The five residual solvents were not detected out in rupatadine fumarate. Conclusion:The method is stable,simple,sensitive and accurate,and can be used for the determination of residual solvents in rupatadine fumarate.

Objective To investigate the change trend of liver function indicators in different types of hyperlipidemia patients. Methods From July 2014 to July 2015 ,a total of 2571 patients with hyperlipidemia and 1063 normal people(control group) were collected in this research.All patients with hyperlipidemia were divided into the hypercholesterolemia group (high TC group ,n=258) ,hypertriglyceridemia group (high TG group ,n=859) and mixed type hyperlipidemia group(n=282) ,low high-density lipo-protein cholesterol group(low HDL-c group ,n=1172).The liver function indicators of total protein (TP) ,albumin (ALB) ,alanine aminotransferase(ALT ) ,aspartate aminotransferase (AST ) ,AST/ALT and globulin (GLB ) were measured in each group. Results The TP and ALB levels in the high TC group ,mixed group and low HDL group were significantly decreased compared with the control group ,the difference was statistically significant (P<0.05).The ALT ,AST ,AST/ALT and GLB levels in the four hyperlipidemia groups had different degrees of increase as compared with the control group ,the difference was statistically signifi-cant(P<0.05).The TP and ALB levels in the mixed group and the low HDL group were significantly lower than those in the high TG group and high TC group ,the difference was statistically significant (P<0.05).The ALT level in the low HDL group was sig-nificantly higher than that in the other three groups ,the difference was statistically significant (P<0.05).The AST/ALT level in the mixed group was significantly higher than the other three groups (P<0.05).The GLB level in the high TC group was signifi-cantly higher than the other 3 groups with statistical difference (P<0.05).Conclusion Blood lipid increase may induce the liver function injury.The detection of liver function indicators in the patients with hyperlipidemia will contribute to the early detection and treatment of fatty liver.

Objective To prepare the chitosan nanoparticles loading 5-[125Ⅰ] Iodo-2'-deoxyuridine (125Ⅰ-UdR-CS-DLN) at 100-200 nm in diameter, and analyze the characteristic of drug sustained-releasing and tumor targeting. Methods Orthogonal experimental design and One-way analysis were applied to optimize the preparation of 125Ⅰ-UdR-CS-DLN using tripolyphosphate cross-linking. Dynamic dialysis was utilized to investigate the in vitro releasing characteristics of the nanoparticles. The tumor targeting effect of the nanoparticles was observed with laser confocal microscopy. Results The optimal conditions for preparing the nanoparticles at particle diameters (70. 39 ± 5.12 ) nm (PDI 0. 16 ± 0. 012 ) were 1 g/L of CS, 2 g/L of TPP, stirring rate 600 r/min, relative molecular mass of CS 3 × 103. The TEM results showed that the exterior of the nanoparticles was spheroid, with a uniform and fine dispersivity. The optimized condition with the initial 125Ⅰ-UdR concentration of 2. 96 MBq/ml at pH5 provided the highest loading capacity (1253. 55 MBq/g) and the highest entrapment rate (42. 35% ). The in vitro releasing curves of 125Ⅰ-UdR-CS-DLN followed Higuchi equation, shown a characteristic of long-acting preparation.Laser confocal microscopy observations approved that the tumor cells uptake of FITC-CS-nanoparticles were significantly more than that of normal cells. Conclusions Chitosan nanoparticles loading 125Ⅰ-UdR at diameters range 127. 81 ± 15. 25 nm (PDI 0. 240 ± 0. 035 ) were successfully prepared with the optimized conditions, and showed a characteristic of sustained-releasing and tumor targeting. The chitosan-based nanotechnology provided a new and efficient approach for the application of 125Ⅰ-UdR in intracellular radiotherapy for tumor.