[Objective] To evaluate the histocompatibility of nano hydroxyapatite-zirconia composite bioceramic.[Methods]According to the standard of ISO 10993-1,cytotoxicity experiment,acute toxicity test,hemolysis test and in vivo implantation(90 days)test were conducted to evaluate the histocompatibility of nano hydroxyapatite-zirconia composite bioceramic.[Results]The score of cytotoxicity experiment was lower than grade I,and there was no significant inhibition of cell growth,no acute toxic reaction or hemolytic reaction.And the in vivo implantation met the requirements of the biological evaluation of implant materials.[Conclusion]Nano hydroxyzpatie-zirconia composite bioceramic showed a good histocompatibility.It has a broad prospect as a biomaterial scaffold in the bone tissue engineering.

Objective To observe the effect ofQizhi Weitong Granules combined with rabeprazole on gastroesophageal dynamics and inflammatory factors in reflux esophagitis (RE) and explore its clinical significance.Methods Nighty-six RE patients from Changping Chinese Medicine Hospital were selected in this study,which randomly divided into control group (n =48) and observation group (n =48).The control group was given rabeprazole 10 mg/time (2 times/d) for 4 weeks.The observation group was given rabeprazole 10 mg/time (2 times/d) and Qizhi Weitong Granule 5 g/time (3 times/d) for 4 weeks.The gastrin and motilin expression was detected by radioimmunity analysis.The IL-17 and IL-23 was detected by ELISA analysis.The rate of clinic effects and adverse reaction was compared.Results There was no significant difference ofgastrin and motilin between the two groups before treatment.After treatment,gastrin and motilin was increased in the two groups (P ＜ 0.05,0.01).However,gastrin and motilin was higher in observation group than that in control group after treatment (P ＜ 0.05).There was no significant difference ofIL-17 and IL-23 between two groups before treatment.After treatment,IL-17 and IL-23 was decreased in the two groups (P ＜ 0.05,0.01).However,IL-17 and IL-23 was lower in observation group than that in control group after treatment (P ＜ 0.05).The rate of clinic effects was 93.8％ in observation group,which was better than 81.3％ in control group (P ＜ 0.05).The rate of adverse reaction was 10.4％ in control group and 8.3％ in observation group.There was no significant difference between two groups.Conclusion Qizhi Weitong Granules combined with rabeprazole can improve gastroesophageal dynamics and inhibit inflammatory response in RE patients,with significantly clinical effect and safety.

BACKGROUND:A large number of literatures have shown that surgeons expose to a higher radiation dose during puncture and bone cement injection in percutaneous vertebral augmentation. OBJECTIVE:To review the research progress in radiation doses and safeguard procedures in percutaneous vertebral augmentation. METHODS: By using percutaneous vertebral augmentation, radiation doses, radiation protective as key words, we retrieved articles related to radiological protection during percutaneous vertebral augmentation published from January 1995 to December 2014 in Wangfang database and PubMed database. RESULTS AND CONCLUSION:One basic principle of radiation protection is that the radiation dose decreases rapidly with distance from the radioactive sources. Surgeons should maximize the distance from the radioactive sources as far as possible in case there is no effect on the operation. To optimize the setting and position of C-arm machine, wear protective devices and put lead shields as wel as computer navigation and radiation training in surgeons al can help to reduce the radiation doses during percutaneous vertebral augmentation. Remote bone cement injection device is easy to control but not increases the radiation doses. In addition, the influence of surgery bed on radiation dose remains to be further studied. We believe that with the in-depth research on radiological protection, vertebral augmentation technique wil be safer in clinical application.

China ; Health Promotion ; Humans ; Occupational Health Services ; Workplace

Objective To observe the effect of scalp needling at different time points on focal cerebral microcirculation in rats with focal ischemia and reperfusion ( I-R). Methods One hundred SD rats were randomized into normal group, sham operation group, model group and scalp needling group. The model group and scalp needling group were divided I-R 12, 24, 48 and 72 h subgroups according to the time of ischemia and reperfusion, 10 rats in each subgroup. The normal group had no oper ation, sham operation only had the operation for vessel isolation, and model group and scalp needling group received middle cerebral artery occlusion with thread. Scalp needling group also had electro-acupuncture on scalp points along vertex and temple anterior linea oblique and posterior linea oblique. And then we observed the neurological severity scores (NSS) and detected the cerebral blood flow ( CBF) in the focal ischemic brain with laser Doppler blood stream meter before I-R and 12, 24, 48 and 72 h after I-R. Immunofluorescence method was used for counting the focal ischemic cerebral microvascular endothelial cells, and then the correlation of cerebral microvascular endothelial cells count with the cerebral blood flow volume was evaluated with Pearson correlation analysis. Results NSS in scalp needling group was lower than that in the model group (P<0.05 or P<0.01). Before I-R, the difference of CBF among the three groups was insignificant ( P>0.05). Except for reperfusion for 24 hours, CBF in scalp needling group was higher than that in the model group at different time points ( P<0.05 or P<0.01). Microvascular endothelial cells count in scalp needling group was higher than that in the model group after reperfusion for 24, 48 and 72 hours ( P<0.05 or P<0.01). In the model group and scalp needling group, cerebral blood flow volume was positively correlated with microvascular endothelial cells count. Conclusion Scalp needling shows obvious effect on improving the microcirculation, increasing CBF and cerebral microvascular endothelial cells count, and promoting the recovery of ischemic tissues of rats after I-R.

According to the limited class hours and requirements of medicinary major curriculum application,this paper attempts to make some choice of physical chemistry teaching contents and emphasize on the first class,and also to explore bilingual teaching of partial chapters and experimental teaching.

AIM: To explore the surgical methods and clinical effects on young patients with congenital lower eyelid entropion.
METHODS: There were 27 patients ( 45 cases ) who suffered congenital lower eyelid entropion accepted the modified blepharosphincterectomy. The clinical effects and complications were evaluated.
RESULTS: After followed up for 6mo, 42 eyes were fully recovered, 3 eyes were unsuccessful and the cure rate was 93%, 5 eyes suffered minor lower eyelid skin folds, none had lower eyelid retraction and ectropion.CONCLUSION: Modified blepharosphincterectomy is an ideal cosmetic surgical treatment for young patients with congenital lower eyelid entropion. It is an effective surgical treatment with fewer complications.

Objective To explore the pathogenesis of ischemic preconditioning to warm ischemia reperfusion injury of hepatocytes in rats. Methods Ninety SD rats were randomly divided into three experimental groups:sham operation group (group A), warm hepatic ischemia/reperfusion group(group B and group C). Group C was given ischemic preconditioning treatment. Serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were detected 0 h, 2 h, 6 h, 12 h and 24 h after ischemia reperfusion injury. Levels of TNF-α and IL-1β were tested detected by ELISA. Levels of malondialdehyde (MDA) and superoxide dismutase (SOD) of hepatocytes were detected at the same time points. Mitochondrial membrane potential was examined to assess ischemia reperfusion injury of hepatocytes in rats using chart of intensity of JC-1 in mitochondria. Results The serum levels of ALT, TNF-α, IL-1β, and MDA were significantly higher in hepatic warm ischemia reperfusion group and ischemic preconditioning group than those in sham operation group (P<0.05). Values of prothrombin activity and cholinesterase were significantly lower in liver warm ischemia reperfusion group and ischemic preconditioning group than those of sham operation group (P<0.05). The SOD level of liver was significantly lower in warm ischemia reperfusion group and ischemic preconditioning group than that in sham operation group. The indexes were better in ischemic preconditioning group than those of warm ischemia reperfusion group (P<0.05). The mitochondrial membrane potential level of liver cells reached the lowest value 0 hours after ischemia and reperfusion, and then increased gradually within 24 hours (P<0.05). And the level of mitochondrial membrane potential of liver cells was significantly higher in ischemic preconditioning group than that in warm ischemia reperfusion group (P<0.05). Conclusion Ischemic preconditioning may play a protective role in warm ischemia-reperfusion injury in rats. Ischemic preconditioning may significantly decrease the levels of ALT, AST, TNF-α, IL-1βand MDA, and increase the SOD activity in hepatocytes. Thedamage of mitochondrial membrane potential is decreased after ischemic preconditioning, which might be the pathogenesis of ischemic preconditioning to warm ischemia reperfusion injury of hepatocytes in rats.

Objective To study a new method and technical specification for Oncomelania snail control in irrigation canals.Methods Four percent niclosamide ethanolamine salt dustable powder was dusted in a test canal three times continuously,and a control canal was set up at the same time.The molluscicidal frequency and effect of niclosamide ethanolamine salt powder was observed and the results,including the change of living snail frames,average density of living snails and mortality of snails,were analyzed.Results Between the third and fifteenth day after the first dusting in the test canal,the reduction rate of the density of snails was more than 90% and after the second and third dusting,the reduction rate was more than 99%.For the average rates of living snail frames and mortality of snails,there were significant differences between the first dusting and later two dustings,while there was no significant difference between the second dusting and the third dusting.On the thirtieth and ninetieth day after the third dusting,the effect of snail control was still satisfactory.There were significant differences between the test canal and control canal about all the observation indexes.Conclusion The application of 4% niclosamide ethanolamine salt dustable powder is efficient in the snail control in irrigation canals,and the suitable frequency of dusting is 2 or 3 times.

Objective To study the effects of up-regulated gene-4 (URG-4) on colon cancer cellproliferation.MethodsColon cancer cell line with high expression of URG-4 was selected.The recombinant URG-4 siRNA retroviral vector was constructed and packaged by PT67 cell,then retroviral particles which can express URG-4 siRNA in mammal cell and its negative control were obtained.Expressions of URG-4 in MKN45,SW480,LoVo,HCT116,HT29 were detected by RT-PCR and Western blot,respectively.Recombinant virus (interference group),original virus (negative control group) and the same amount of PBS (blank group) were used to transfect LoVo cells respectively.Stably transfected cell lines were screened.The growth condition of cell lines in each group was assayed by MTT.All data were analyzed by the one-way analysis of variance and the t test.Results Sequencing results confirmed the successful construction of retroviral which expressed siRNA,the relative expression levels of URG-4 mRNA in MKN45,SW480,LoVo,HCT116,HT29 were 0.58 +0.02,0.63 ±0.03,0.81 ± 0.01,1.01 ± 0.02,0.91 ± 0.04 and the expression levels of URG-4 protein in the 5 cell lines were 0.73 ±0.02,0.85 ± 0.03,1.42 ± 0.01,0.80 ± 0.30,0.80 ± 0.04,respectively.High expression of URG-4 was observed in the LoVo cells.The expression of URG-4 mRNA in the LoVo cells in the interference group was 0.55 ±0.03,which was significantly lower than 1.15 ±0.02 of the negative control group and 1.15 ±0.01 of the blank group ( t =- 5.179,- 9.285,P ＜ 0.05 ).The inhibition rate of URG-4 mRNA in the interference group was 52.6％.The expression of URG-4 protein in the interference group was 0.82 ± 0.05,which was significantly lower than 1.46 ± 0.07 of the negative control group and 1.54 ± 0.04 of the blank group (t =-4.239,-3.704,P＜0.05).The inhibition rate of URG-4 protein in the interference group was 43.6％.The LoVo cells in each group grew exponentially.Compared with the negative control group,the cell growth of the interference group was inhibited during day 3 to day 6,which had statistical significant difference ( t =- 6.436,-6.045,-6.434,-4.285,P＜0.05).ConclusionInterference of the expression of URG-4 can inhibit the growth of LoVo cells.