BACKGROUND:There are usualy removable appliances and fixed appliances in the mouth of orthodontic patients, resulting in periodontitis. Because of its high security, good heat resistance, long action time, not easy to produce resistance and wide antimicrobial spectrum, inorganic antibacterial agents have become a research hotspot. OBJECTIVE:To review the application and research progress of inorganic nano-antibacterial materials in orthodontic treatment. METHODS:A computer-based search of PubMed and CNKI databases was performed for articles about applications of inorganic nano-antibacterial materials in orthodontic treatment published from January 2001 to December 2014 using the keywords of “orthodontic, antibacterial agent” in English and Chinese, respectively. RESULTS AND CONCLUSION:Inorganic nano-antibacterial materials for oral bacteria have good antibacterial properties, and are a kind of ideal biological material. Bracket enamel adhesive, removable appliance resin material and bracket can play correct and antibacterial roles by modification of inorganic nano-antibacterial materials, so as to reduce complications such as dental caries. However, the application of nano-antibacterial materials is stil in its infancy, the modified materials need to be studied further in terms of color problems, physical and chemical properties and biological security.

Herbal property theory of traditional Chinese medicines is the theoretical guidance on authentication of medicinal plants, herborization, preparation of herbal medicines for decoction and clinical application, with important theoretical value and prac- tical significance. Our research team proposed the "three-element" theory for herbal properties for the first time, conducted a study by using combined methods of philology, chemistry, pharmacology and mathematics, and then drew the research conclusion that herbal properties are defined as the chemical compositions-based comprehensive expression with complex and multi-level (positive/negative) biological effects in specific organism state. In this paper, researchers made a systematic mathematical analysis in four aspects--the correlation between herbal properties and chemical component factors, the correlation between herbal properties and organism state fac- tor, the correlation between herbal properties and biological effect factor and the integration study of the three elements, proposed future outlook, and provided reference to mathematical studies and mathematical analysis of herbal properties.
Drug Compounding ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Humans ; Medicine, Chinese Traditional ; Models, Theoretical ; Phytotherapy ; Plants, Medicinal ; chemistry

Objective To discuss the etiology,clinical features,diagnosis and treatment of congenital pleural effusion in fetuses and neonates in order to improve the understanding of this disease. Methods Six neonate cases with congenital pleural effusion were retrospectively analyzed in neonates who were admitted to the Department of Neonatolo-gy of the First Affiliated Hospital of Zhengzhou University after birth and the etiology,clinical features,diagnosis and re-lated treatment were analyzed based on literature review. Results Among 6 patients with congenital pleural effusion, chylothorax was found in 3 cases,one of whom had chylothorax,chylous abdominal,21 trisomy syndrome and congenital hypothyroidism,and the etiology of the other 3 cases were unknown. Diagnosis mainly was depended on imaging and la-boratory tests. The number of nucleated cells of hydrothorax or ascites were(1 588 - 13 057)× 106 / L,mainly lympho-cytes. Protein qualitative was( + - + + + ),the chylothorax qualitative test was positive in 3 cases. The liver function showed that the total protein and albumin were decreased in varyig degrees. Conservative or surgical treatment was taken according to the situation of the patients. Among 6 patients,3 cases were cured after treatment,the others gave up treat-ment finally. Conclusions The etiology of congenital pleural effusion was different,and often associated with chromo-somal abnormalities or other malformations,ultrasonography was the main method to diagnose congenital pleural effusion and the patients should be dynamically observed or treated during the antepartum or intrapartum period. If the neonates are found to have pleural effusion in prenatal period early diagnosis and treatment is a best choice.

Objective To evaluate the effects of isoflurane postconditioning on cerebral ischemia-reperfusion (I/R) injury in rats.Methods Thirty-two male Sprague-Dawley rats,weighing 280-320 g,were randomly divided into 4 groups (n=8 each):group sham operation (group S),group I/R,group isoflurane preconditioning (group Ⅰ-pre),and group isoflurane postconditioning (group Ⅰ-post).Global cerebral I/R was induced by 4-vessel occlusion method described by Pulsinelli.1.5％ isoflurane was inhaled for 2h before ischemia in group Ⅰ-pre.1.5％ isoflurane was inhaled for 30 min immediately after onset of reperfusion in group Ⅰ-post.Neurological function was assessed and scored at 24h of reperfusion.The rats were sacrificed at 72h of reperfusion and hippocampi were isolated for determination of neuronal apoptosis (by TUNEL),caspase-3 expression (by immuno-histochemistry),and phosphorylated c-Jun N-terminal kinase (p-JNK) protein expression (by using Western blot) in hippocampal tissues.Apoptotic rate was calculated.Results Compared with S group,the number of grid cross was decreased,twist time was prolonged,hanging time was shortened,apoptotic rate was increased,and the expression of caspase-3 and p-JNK protein was up-regulated in I/R,I-pre and Ⅰ-post groups (P ＜ 0.05).Compared in I/R group,the number of grid cross was increased,twist time was shortened,hanging time was prolonged,apoptotic rate was decreased,and the expression of caspase-3 and p-JNK protein was down-regulated in Ⅰ-pre and Ⅰ-post groups (P ＜ 0.05).Compared with I/R group,the number of grid cross was decreased,hanging time was shortened,apoptotic rate was increased,and the expression of caspase-3 was up-regulated (P ＜ 0.05),and no significant changes in the expression of p-JNK protein were found in Ⅰ-post group (P ＞ 0.05).Conclusion Isoflurane postconditioning can reduce cerebral I/R injury,the efficacy is weaker than that of preconditioning and the mechanism is related to activation of JNK signal transduction pathway and inhibition of neuronal apoptosis in hippocampus of rats.

Objective: The primary aim of this research is to systematically sort out and analyze available documents for yang deficiency syndrome in traditional Chinese medicine, providing innovative ideas and methods for statistical study of yang deficiency syndrome. Methods: Based on the China National Knowledge Internet (CNKI) and Chongqing VIP databases, using "yang deficiency", "deficiency cold", and "patient" as keywords, we searched literature of clinical researches and used "ratio-comparison" and "integration-comparison" to analyze objective data after data preprocessing. Relative importance value of physiological and biochemical parameters were reflected by P value calculated by ratio-comparison or Q value by integration-comparison. Results: With calculation of relative importance values of clinical indicators among various systems, we got the ranking of relative importance of different indexes. Triiodothyronine and urine 17-hydorxycorticosteroid of endocrine system, immunoglobulin A of immune system, and the ratio of cyclic adenosine monophosphate to cyclic guanosine monophosphate, which had great |P| (or |Q|) values and negative P (or Q) values, had a clearly lower level in yang deficiency patients than in the control; hemorheological indicators such as plasma viscosity, whole blood reduced viscosity and erythrocyte electrophoresis time had small |P| (or |Q|) values. These indicators, however, showed less importance for reflecting yang deficiency. Conclusion: Ratio-comparison method and integration-comparison method employed in this study have merits of efficiency and robustness. After detailed compiling and mining of all available data, we have made reasonable advice on the most relevant index of yang deficiency for further study of the essence of this syndrome.

Objective To investigate the association of uncoupling protein 2 ( UCP-2 ) gene promoter -866G＞A polymorphism and ischemic stroke in diabetic patients.Methods A total of 844 type 2 diabetic patients including 404 cases with ischemic stroke and 440 cases without ischemic stroke were selected for the 4 year prospective study,Genomic DNA was extracted from the whole blood samples of subjects,UCP-2 gene promoter -866G ＞ A polymorphism was detected by TaqMan MGB probe method,and then the genotype and allele gene frequencies were compared.Results The risk of ischemic stroke in type 2 diabetic female patients with AA+GA genotypes of UCP-2 was higher than that with GG genotype (P＜0.05),but there was no difference among male patients with three genotypes.Conclusions UCP-2 gene promoter -866G ＞ A polymorphism increases the risk of ischemic stroke in Chinese diabetic women.

Studying the essence of syndromes (Zheng) in traditional Chinese medicine (TCM) is a fundamental challenge in basic theoretical research of TCM. The relationship between any given syndrome and biochemical indicators is one of the important aspects of the study. As the indexes selected in each study are specific to a particular Western medical disease diagnosis, and the disease factor is inevitably introduced into the study, the effect of disease factor on the index changes cannot be assessed effectively by traditional data processing methods. This is known as "the same syndrome with different reasons", which has resulted in confusion in TCM research. This study aimed at providing a mathematical tool to address this issue. Based on information theory and the residual-split method, the syndrome information, which was covered in the index variation, was quantitatively calculated in this paper as an independent part of the disease factor. A mathematical model capable of objectively assessing and statistically testing the effect of the syndrome factor on the index changes was established. Applying this model to literature data of studies on the relationship between cyclic nucleotides and yang-deficiency syndrome showed following results. First, the values of yang-deficiency syndrome information were negative for cyclic adenosine monophosphate (cAMP) while positive for cyclic guanosine monophosphate (cGMP) in all included literature. This indicated that the group of yang-deficiency syndrome was correlated with an obvious trend of reduced cAMP levels and increased cGMP levels. Second, the statistical test results of yang-deficiency syndrome information of the two indexes were different among the literature included. The quality of original data was considered as a possible reason. Third, the significant differences between the yang-deficiency group of a specific disease and the normal group may, in some cases, be caused by a disease factor rather than a syndrome factor. The mathematical model provided a reasonable mathematical tool for the analysis of disease factor and syndrome factor in clinical research of TCM, suggesting that the mathematical model may give rise to innovative ideas and methods in the study of syndromes.

Lactose was shown to no less competent than Isopropyl-?-D-thiogalactoside (IPTG) in inducing the expression of the ENHANCIN coding gene from Helicoverpa armigera granulosis virus in Eswcherichia coli BL21 (DE3) regulated by a T7 promoter, since the lactose induction could lead to an ENHANCIN band no smaller than the one in IPTG induction on the SDS-PAGE gel. This would decrease the cost of the large-scale ENHANCIN production. The lactose concentration was optimized at 2.2% - 2.5% (w/v) . Different treatments on the lactose sterilization showed that lactose steam- sterilized in 116. 5℃ for 15min could lead to the ENHANCIN production. The convenience and the relatively low cost in its" operation could further decrease the cost of the ENHANCIN production.

Background Fractalkine is involved in the impairment of endothelium by mediating inflammatory cell chemotaxis.Aspirin inhibites many kinds of cytokine expression.Objective To investigate the effect of aspirin on tumor necrosis factor ?(TNF-?) stimulated fractalkine expression in human umbilical vein endothelial cells (HUVEC) and its mechanism.Methods HUVEC were grouped as follows:control group;TNF-?-stimu- lated;TNF-?+NS-398;TNF-?+PDTC and TNF plus various concentration of aspirin (0.02,0.2,1.5 mmol/L). The level of mRNA and protein expression of fractalkine and nuclear factor(NF)-kB p65 was determined by RT- PCR and Western blot.Results 1)Fractalkine mRNA and protein level was increased after 4 ?g/L TNF-? stim- ulation in HUVEC(both P

Objective To investigate the prevalence and risk factors of Toxoplasma gondii infection among key populations in Wuxi City,Jiangsu Province,so as to provide evidences for developing preventive and control interventions for T. gondii in-fection. Methods A questionnaire was designed to conduct face-to-face interviews to HIV/AIDS carriers/patients,tumor pa-tients,pregnant women and pet breeders. The blood samples were collected to test anti-Toxoplasma IgM and IgG antibodies by using ELISA method. Results Totally 404 participants were investigated,and 38 were positive in testing T. gondii antibodies (9.4%),and among these,37(97.4%)were IgG positive and 1(2.6%)was IgM positive. The multivariate logistic regression indicated that age,regularly contacting cats/dogs and being HIV positive were associated with the infection of T. gondii(OR=2.1,2.6 and 2.3,all P < 0.05). Breeding pets,being HIV positive and being tumor patients were more likely to infect T. gondii than being pregnant(OR = 1.5,8.1 and 2.8,all P < 0.05). Conclusion The high infection rate of T. gondii is observed among key populations in Wuxi City,so that the effective measurements should be taken to enhance the intervention among key popula-tions including immunocompromised people,pet breeders or people having bad dietary habits of eating raw food.