Objective: To evaluate shaping ability of nickel-titanium rotary instruments (Hero 642) in curved root canals. Methods:The computer assistant measure system of simulated root canal was used for quantitative analysis of root shape in eight simulated root canals during nickel-titanium rotary instruments (Hero 642) shaping process. Results:Nickel-titanium rotary instruments (Hero 642) could keep the curved angles in simulated canals very well. The cutting of Hero 642 in curved root canals was balanced and there was almost no transportation of canals central lines when the simulated canals were prepared to 0.02 taper 25~# and 30~# files. Conclusion:Nickel-titanium rotary instruments (Hero 642) has good shaping ability. In preparation of highly curved canals, the master apical file (MAF) may be Hero 642 0.02 taper 30# files.

Objective:To evaluate shaping ability of stainless steel fi les. Methohs: A computer assistant measure system for the simula tion of root canal was set up and used for quantitative analysis of root shape o f eight simulated root canals during stainless steel files shaping process. Results:Although the stainless steel files were precurved, they stra ightened the simulated canals obviously. The cutting of the stainless steel file s on curved root canals was unbalanced. Conclusion:More flexible files and improvement of technique are essential for curved canals shaping.

Objective To compare serum protein fingerprint among Uygur patients with thyroid cancer and benign thyroid nodules, and Han patients with thyroid cancer, and to screen ethnic-specific protein markers of thyroid cancer. Methods Using the technology of two-dimensional polyacrylamide gel electrophoresis (2D-PAGE), the protein expression profiles of Uygur and Han patients with thyroid cancer and Uygur patients with thyroid nodules were established and compared by image analysis software between two groups. Liquid chromatography-mass spectrometry/mass spectrometry coupling techniques ( LC-MS/MS) were used to identify differential protein. The protein′s name, cellular localization and functional classification were searched in Swissport database. Results There are 11 differentially expressed proteins by comparison of sera in Uygur patients with benign thyroid nodules and thyroid cancer, in which complement C3 and C4b levels were down-regulated in the serums of Uygur patients with benign thyroid nodules, and 9 proteins such as heme-binding proteins etc were up-regulated. There are 7 differentially expressed proteins by comparison of serums in Uygur and Han patients with thyroid cancer, in which transferrin level was up-regulated in the serum of Uygur patients with thyroid cancer, and 6 proteins such as cytokeratin-1 etc were down-regulated in serum of Uygur patients with thyroid cancer. Conclusion Combined screening of multiple labelled proteins including heme-binding protein,α2-macroglobulin, and transferrin protein etc may provide the basis for the diagnosis of thyroid cancer in Uygurs and Hans.

Objective To summarize the effect and safety of percutaneous coronary intervention (PCI) for CHD in patients with single patent coronary artery. Methods We collected the data of CHD in 10 patients with single patent coronary artery who underwent PCI and analyzed them retrospectively. Results All patients with single patent coronary artery had successful PCI. Symptoms of all the CHD patients had been significantly relieved after PCI. No major adverse cadiac events occurred in hospitalization. Conclusion The data suggest that the patients with single patent coronary artery might be treated with PCI effectively and safely.

Background Vitretomy and lenstomy with silicone oil tamponade is an effective method for complicated vitreous retinopathy.The severe anisometropia after silicone retention is usually treated by two-point transscleral suture fixation for posterior chamber intraocular lens(IOL)implantation.In order to reduce the number and difficulty and complication of the operation,the surgical method should be improved.Objective The goal of this study was to observe the resuh of silicone oil removal combined with four-point trans-scleral suture fixation of posterior chamber IOL after vitrectomy.Methods A retrospective case-observational study design was adopted.Twenty eyes with silicone oil tamponade from 20 patients without lens and posterior capsule after vitrectomy were included in this study.Silicone oil removal with four-point trans-scleral suture fixation of posterior chamber IOL was performed.The anterior ocular inflammatory response,intraocular pressure,uncorrected and corrected acuities before and after operation,corneal endothelial cell counting and postoperative complications were observed and analyzed.Written informed consent was obtained from all patients prior to the operation.Results All of the operative eyes in this study showed improvement of visual acuity after operation.Of the 20 eyes,a visual acuity of ≥0.8 was seen in 2 eyes,0.6-0.7 in 6 eyes,0.3-0.5 in 8 eyes and 0.05-0.2 in 4 eyes 3 months after the removal of silicone oil.The uncorrected acuity postoperation was significantly improved in comparison with preoperation(H=10.147,P＜0.01),but no significant difference was found in the corrected acuity between preoperation and postoperation(X =2.089,P＜ 0.01).The number of the corneal endothelial cells was(2064±329)cells/mm2 before operation,and that after operation was(1987±269)cells/mm2,showing an insignificant change between them(t =1.660,P ＞ 0.05).No abnormality of IOL position was found in all 20 operated eyes.There was not serious postoperative complication in all 20 patients.Conclusions The combination of silicon oil extraction with four-point transscleral suture fixation IOL is effective in eyes without posterior capsule or lens after vitrectomy.It can reduce the operation time and improve the postoperative acuity and the quality of life of patients.

Adolescent ; Adult ; Drug Therapy, Combination ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Hepatitis B, Chronic ; drug therapy ; Humans ; Injections, Intravenous ; Male ; Middle Aged ; Phytotherapy ; RNA ; administration & dosage ; Salvia miltiorrhiza ; chemistry

Child ; Child, Preschool ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Respiratory Tract Diseases ; diagnostic imaging ; Tomography, Spiral Computed ; methods

Bioactive natural products are the material bases of Chinese materia medica resources. With successful applications of synthetic biology strategies to the researches and productions of taxol, artemisinin and tanshinone, etc, the potential ability of synthetic biology in the sustainable utilization of Chinese materia medica resources has been attracted by many researchers. This paper reviews the development of synthetic biology, the opportunities of sustainable utilization of Chinese materia medica resources, and the progress of synthetic biology applied to the researches of bioactive natural products. Furthermore, this paper also analyzes how to apply synthetic biology to sustainable utilization of Chinese materia medica resources and what the crucial factors are. Production of bioactive natural products with synthetic biology strategies will become a significant approach for the sustainable utilization of Chinese materia medica resources.
Artemisinins ; metabolism ; Biosynthetic Pathways ; Biotechnology ; Diterpenes, Abietane ; genetics ; metabolism ; Drugs, Chinese Herbal ; metabolism ; Escherichia coli ; metabolism ; Ginsenosides ; genetics ; metabolism ; Metabolic Engineering ; methods ; Paclitaxel ; metabolism ; Saccharomyces cerevisiae ; genetics ; metabolism ; Salvia miltiorrhiza ; genetics ; metabolism ; Synthetic Biology

Objective:To search for the optimum formula for the self emulsification of evening primrose oil. Methods: Through solubility experiment, orthogonal screen and drawing phase diagram, taking the degree of emulsifying, the volume of the rest oil and emulsion particle size as parameters,the oil, non ionic surfactant and flux for the optimum formulation were screened. Results: In the formulation of evening primrose oil, taking Tween 85 as the non ionic surfactant and propylene glycol as the co surfactant can get the best effect of emulsifying. Conclusion: The optimum formula for self emulsification of evening primrose oil is evening primrose oil, Tween 85 and propylene glycol,with their proportion being 5∶7∶3.

Objective To construct the lentivirus carrying human ?-catenin-EGFP(enhanced green fluorescent protein)and observe its expression in human follicle stem cells.Methods The ?-catenin gene sequence was amplified by RT-PCR from extraction of total RNA of human vascular endothelial cells.TA cloning technique was utilized to acquire gene subcloned pUCm-T-?-catenin.After transformation reaction,candidate clone was further analyzed by PCR and gene sequencing.Then the plasmid was transfected into FT293 cells.After identification by Western blotting,the plasmid was transfected into FT293 cells again for packaging.Infection titer was monitored by green EGFP expression.The expression of ?-catenin-lentivirus in human follicle stem cells were observed under inverted fluorescence microscope.Results The ?-catenin gene was cloned into the lentivirus successfully.The high expression of green fluorescence protein in FT293 cell line was found under fluorescent microscope.Viral titer checked by real-time PCR was about 2.0?108 TU/mL.When the multiplicity of infection(MOI)was 10,the infection efficiency of ?-catenin-lentivirus in human follicle stem cells was nearly 80% after infection 48 h around.After 3 weeks of continuous observation,we found the infection efficiency still keeping in the range of 80%-90%.Conclusion The lentivirus expression vector for ?-catenin was successfully constructed.It can steadily infect human follicle stem cells and the infection efficiency is considerable high.