Objective: To clinically evaluate the efficacy of electrolyzed oxidizing water (EOW) as a root canal irrigation solution on disinfecting bacteria and removing the smear-layer to keep the non-bacterium state in the root canal. Methods: In the first experiment, 108 single-rooted teeth that needed root canal treatment were randomly divided into two groups. EOW was used as the root canal irrigation solution in the experimental group while 30 ml/L H2O2, saline solution, and 75 g/L EDTA solution were used as controls. Bacteriological examinations were conducted from each tooth before and after treatment with the root canal irrigation solutions. In the second experiment, the 20 fresh human extracted teeth were divided into two groups and treated as same as the first experiment in root canal preparation and irrigation. After irrigation, the apical canal wall was observed using SEM. Results: There was no significant difference in bacterial growth and removing the smear layer between the group using EOW and that using saline solution, 30 ml/L H2O2 and 75 g/L EDTA solution. Conclusion:The results indicate EOW is useful as a clinical root canal irrigation solution.

Manganese peroxidase (MnP), a crucial enzyme in lignin degradation, has wide potential applications in environmental protection. However, large-scale industrial application of this enzyme is limited due to several factors primarily related to cost and availability. Special attention has been paid to the production of MnP from inexpensive sources, such as lignocellulosic residues, using solid-state fermentation (SSF) systems. In the present study, a suitable SSF medium for the production of MnP by Schizophyllum sp. F17 from agro-industrial residues has been optimized. The mixed solid medium, comprising pine sawdust, rice straw, and soybean powder at a ratio of 0.52:0.15:0.33, conferred a maximum enzyme activity of 11.18 U/g on the sixth day of SSF. The results show that the use of wastes such as pine sawdust and rice straw makes the enzyme production more economical as well as helps solve environmental problems.
Culture Media ; Fermentation ; Industrial Microbiology ; methods ; Oryza ; Peroxidases ; biosynthesis ; Schizophyllum ; enzymology ; Wood

Traditional Chinese medicine has a long history of intranasal administration. Compared with the other administration routes, intranasal administration has the benefits of fast absorption, high bioavailability, high brain-targeting and non-invasive. In the past few years we take "Xingnaojing" and "Tongqiao Sanyu formula" as model drug and studied pharmacokinetics of effective components of different polarities. MDCK/MDCK-MDR1 cells were used to simulate blood brain barrier to study the permeate behaviors of different drug and the mechanism of enhancing effects of aromatic medicine. Then a microemulsion (modified by mPEG2000-PLA) was prepared for intranasal administration, and the pharmacokinetics and investigated tissue distribution were studied by fluorescence imaging. The irritation of the drug and different preparations were studied on human nasal epithelial cell (HNEC) cell and living animals. In this paper, we reviewed the achievements and hope that it can provide constructive suggestions for the future research.
Administration, Intranasal ; instrumentation ; methods ; Animals ; Biological Availability ; Blood-Brain Barrier ; drug effects ; Drugs, Chinese Herbal ; administration & dosage ; pharmacokinetics ; Humans

Objective To obtain recombinant human Smith D1 (Sm D1) antigen and establish detecting assay.Methods Human Smith D1 antigen was synthesized by PCR using human Leukemic cDNA. The prokaryotic expression vector pGEX-ST-Sm D1 was constructed and transformed into E.coli.BL21 cell.Protein expressed under the induction of IPTG.We established DIGFA for detecting anti-Sm D1 antibodies with purified Sm D1 antigens.Results Sequence and restriction analysis revealed Sm D1 gene was cloned in frame into pGEX-5T,SDS-PAGE profile showed a clear protein band with a relative molecular weight of 39 000 and western blotting indicated that the expressed product specifically reacted to polyclonal anti-human Sm D1 genes.There was no significant difference between DIGFA and IB.The agreement between DIGFA and IB was 91.7% as calculated by Kappa statistical method.The sensitivity and specificity of DIGFA were 100% and 83.3% repectively.Conclusions Human Sm D1 gene is successfully cloned、 expressed and purification.The DIGFA,using purified Sm D1 antigens,is as good as IB,rather simpler, more rapid and reliable assay.

ObjectiveTo investigate the status of job satisfaction and the influencing factors of the disabled in order to know their employment quality.Methods79 disabled employees of one company in Hunan province were randomly interviewed with Minnesota Satisfaction Questionnaire.ResultsThe overall satisfaction scores of 74 disabled workers was 67.78, which inner satisfaction was better than external satisfaction. The most satisfied was job independence and colleagues' relationships and the most unsatisfied was work flexibility and conditions. There were statistically significant differences between gender, age, disabled species and job satisfaction. In personal level, most influencing factors of disabled job satisfaction were gender, age, disability and salary types.ConclusionVocational rehabilitation such as the high-risk population could be performed specifically on the basis of the job satisfaction survey.

To clone, express and primarily use human autoantigen Sm D1 in methylotrophic yeast Pichia Pastoris. The gene Sm D1 was cloned by PCR.The PCR product was inserted into the vector pPIC9k. The recombinant plasmid pPIC9k- Sm D1 was transformed into yeast SMD1168 by electroporation. The positive clones were screened in MD plates. The high copy number transformants were rapidly selected by using G418 and were induced by methanol. Supernatants after induction were analyzed by SDS-PAGE and im-munodot. The PCR product was showed about 360 bp in size which was in accordance with predicted. The pPIC9k-Sm D1 showed the same seqencing result with GenBank’s report and restriction enzyme analysis confirmed our prediction. The pPIC9k-Sm D1 positive clone produced an about 16 kD protein which had natural immunogenicity of human autoantigen Sm D1 by SDS-PAGE and immunodot. The sensitivity and specificity of immunodot were 96% and 100%, respectively. The agreement between immunodot and im-munoblot was 98%. Successfully cloning and high-level expression of human autoantigen Sm D1 in methy-lotrophic yeast Pichia pastoris laid a foundation for further research work.

Objective To establish an HPLC fingerprint of raw and honey baked Farfarae Flos for its quality control and samples differentiation. Methods An HPLC method has been developed for the fingerprinting and evaluation of 36 batches of raw and honey baked Farfarae Flos collected from different locations. The Similarity Evaluation System for Chromatographic Fingerprint of TCM (2012A edition) was used to evaluate the similarity of 36 batches. The difference between raw and honey baked Farfarae Flos was identified by chemical pattern recognition methods including hierarchical cluster analysis (HCA), principal component analysis (PCA), and partial least squares discriminate analysis (PLS-DA). Results A standard fingerprint containing 20 common peaks was constructed from 36 batches of raw and honey baked Farfarae Flos, and identified 10 of them. The similarity of all batches with reference fingerprint was between 0.723-0.984. The similarity of 16 batches of raw Farfarae Flos was between 0.862-0.998, and the similarity of 20 batches of honey baked Farfarae Flos was between 0.687-0.993. HCA, PCA and PLS-DA results demonstrated that there were obvious distinction between raw and honey baked Farfarae Flos. According to the VIP plot, ten constituents including gallic acid, chlorogenic acid, isochlorogenic acid A, and tussilagone were primarily response for the discrimination. Conclusion The combination of HPLC fingerprint and chemical pattern recognition could provide a comprehensive reference for the quality control and quality evaluation of raw and honey baked Farfarae Flos.

In order to investigate the characteristics of transdermal delivery of ferulic acid under the treated of microneedle arrays and the influence on permeability of rat skin capillaries, improved Franz-cells were used in the transdermal delivery experiment with the rat skin of abdominal wall and the length of microneedle arrays, different insertion forces, retention time were studied in the influence of characteristics of transdermal delivery of FA. The amount of FA was determined by HPLC system. Intravenous injection Evans blue and FA was added after microneedle arrays treated. Established inflammation model was built by daubing dimethylbenzene. The amount of Evans blue in the rat skin was read at 590 nm wavelength with a Multiskan Go microplate reader. Compared with passive diffusion group the skin pretreated with microneedle arrays had a remarkable enhancement of FA transport (P <0.01). The accumulation of FA increased with the enhancement of insertion force as to as the increase of retention time. Microneedle arrays with different length had a remarkable enhancement of FA transport, but was not related to the increase of the length. The research of FA on the reduce of permeability of rat skin capillaries indicated that the skin pretreated with microneedle arrays could reduce the content of Evans blue in the skins of rat significantly compared with the untreated group. The permeation rate of ferulic acid transdermal delivery had remarkable increase under the treated of microneedle arrays and the length of microneedle arrays ,the retention time so as to the insertion force were important to the transdermal delivery of ferulic acid.
Administration, Cutaneous ; Animals ; Coumaric Acids ; administration & dosage ; pharmacokinetics ; Male ; Needles ; Rats ; Rats, Sprague-Dawley ; Skin Absorption

AIM: To observe the levels of triglyceridemia(TG),uricemia(UA),glycemia(GLU),the activity of 3-glyceraldehyde phosphate dehydrogenase(GAPDH) in blood and the gene expression in the liver in the animal model of hypertriglyceridemia,hyperuricemia and hyperglycemia.METHODS: SD rats were randomly divided into three groups,control group,fructose group,fructose and fenofibrate treated group.Rats in control group were fed with standard chow.Rats in fructose group were fed with high fructose diet.Rats in fructose and fenofibrate group were fed with high fructose diet,and treated with fenofibrate 100 mg?kg-1?d-1 by intragastric administration at the same time.Rats in control group and fructose group were given distilled water by intragastric administration.The levels of TG,UA and GLU were detected.Improved method was used to measure the activity of GAPDH.Quanti Gene technology was applied to determine the transcriptional level of GAPDH mRNA.RESULTS: During 7-28 d,the level of TG in fructose group was significantly and persistently high.During 14-28 d,the level of UA was higher.The level of GLU higher than that in control group was only observed at 28th day.The GAPDH activity change in blood and the expression in liver were significantly lower than that in norma1 during 7-28 d.Fenofibrate had the effect on reducing TG only at 7th day and reduced the level of GLU significantly at 28th day.Fenofibrate also increased the GAPDH activity in blood and the expression in liver at 7th day.CONCLUSION: ① The level of TG is significantly and persistently high in the early days by feeding with excessive fructose.The levels of UA and GLU are higher with the time cause of the model development.② The significantly higher level of TG,UA and GLU may be correlated with the reduction of the GAPDH activity in blood and the expression in liver.③ Fenofibrate has the effect of reducing the TG level only in the condition of hypertriglyceridemia,but not in the condition of accompanying hyperuricemia and hyperglycemia.④ The mechanism of reducing the TG level by fenofibrate may be correlated with the increase in GAPDH activity in blood and the expression in liver.

Objective To evaluate the use of double balloon endoscopy(DBE) in diagnosis of ulcerative lesions in small intestine.Methods Data of patients diagnosed as small intestinal ulcer under DBE during September 2003 and December 2007 at Nanfang Hospital were analyzed retrospectively.Results Ulcer in small intestine was detected by DBE in a total of 62 patients,including 48 males and 14 females,aging from 10 to 71 years old( mean 43.9 yr).The main clinical manifestations consisted of small intestinal hemorrhage(38/62,61.3%),abdominal pain(16/62,25.8%),abdominal distention(5/62,8.1%),loss of weight(2/62,3.2%),and diarrhea(1/62,1.6%).The ulcers were diagnosed endoscopically as Crohn's disease(CD) in 53 cases(85.5%),drug induced lesions in 4(6.5%),nonspecific chronic inflammation in 2(3.2%),lymphoma in 2(3.2%) and tuberculosis in 1(1.6%).They were all microscopically diagnosed as chronic inflammation.Of the 62 patients,32(51.6%) underwent surgery.In 30 cases of CD diagnosed by DBE,22 were confirmed by post-surgery pathology(malignant cells were found in 3),while in the other 8 cases,4 were diagnosed as lymphoma,3 as Behcet's disease and 1 as tuberculosis.Meanwhile,the 1 case of tuberculosis and 1 lymphoma diagnosed by DBE were confirmed as CD after operation.The overall accurate diagnosis rate of small intestinal ulcerative lesions by DBE was 68.8%(22/32).Conclusion DBE is valuable in diagnosis of ulcerative lesions in small intestine,but surgery should be included into consideration to confirm the diagnosis when necessary.