Roles of Cilia in Heart Development and Congenital Heart Disease / 中国医学科学院学报

Cilia are protruding cell structures on the cell surface and are found in almost every type of cell.According to the different structures and quantity of tubulins,cilia can be divided into two categories:motor cilia and sensory cilia.Sensory cilia are also called non-motor cilia and primary cilia,due to the composition and number of tubulins.They are closely related to the development of internal organs and many human physiological activities.Recent studies have demonstrated that cilia are involved in regulating the formation of left and right symmetry of the heart structure,and eventually the heart develops into the left-right asymmetry structures.Since congenital heart diseases(CHD)are characterized by abnormalities in the spatial structure of the heart chamber and outflow tract,cilia may play an important role in the pathogenesis of CHD.Cilia,mainly through ciliary transduction signal pathways,regulate both the formation of left and right asymmetrical structures and the polarity and the migration of cells.Therefore,a clear understanding of the regulation mechanism of ciliary signaling pathway on heart development can provide new therapeutic targets and new ideas for the clinical treatment of CHD and may offer new target genes for prenatal screening of CHD.This article summarizes recent advances in the role of cilia in heart development and CHD pathogenesis and its mechanisms.

Chemistry research on natural product derivatives of dihydro-β-agarofuran sesquiterpenoids / 中国中药杂志

Dihydro-β-agarofuran sesquiterpenoids possess chemical diversity and biodiversity. A dihydro-β-agarofuran sesquiterpenoid with only hydroxyl groups has been prepared by basic hydrolysis of crude extract of Euonymus bungeanus with 0.4% yield. Twelve derivatives were available in esterification, oxidation, decarboxylation, etc. Extensive ~1H-NMR,~(13)C-NMR, MS spectroscopic analyses and single-crystal X-ray diffraction analysis with Cu Kα radiation indicated that eleven derivatives were new compounds. The results will provide reference for chemistry study on natural product derivatives of dihydro-β-agarofuran sesquiterpenoids.

Biotransformation of quercetin by Gliocladium deliquescens NRRL 1086 / 中国天然药物

With an attempt to synthesize high-value isoquercitrin (quercetin-3-O-β-D-glucopyranoside), we carried out the biotransformation of quercetin (1) by Gliocladium deliquescens NRRL 1086. Along with the aimed product quercetin 3-O-β-D-glycoside (2), three additional metabolites, 2-protocatechuoyl-phlorogucinol carboxylic acid (3), 2,4,6-trihydroxybenzoic acid (4), and protocatechuic acid (5), were also isolated. The time-course experiments revealed that there were two metabolic routes, regio-selectivity glycosylation and quercetin 2,3-dioxygenation, co-existing in the culture. Both glycosylation and oxidative cleavage rapidly took place after quercetin feeding; about 98% quercetin were consumed within the initial 8 h and the oxdized product (2-protocatechuoyl-phlorogucinol carboxylic acid) was hydrolyzed into two phenolic compounds (2,4,6-trihydroxybenzoic acid and protocatechuic acid). We also investigated the impact of glucose content and metal ions on the two reactions and found that high concentrations of glucose significantly inhibited the oxidative cleavage and improved the yield of isoquercitrin and that Ca, Fe, Mn, Mg, and Zn inhibited glycosylation. To test the promiscuity of this culture, we selected other four flavonols as substrates; the results demonstrated its high regio-selectivity glycosylation ability towards flavonols at C-3 hydroxyl. In conclusion, our findings indicated that the versatile microbe of G. deliquescens NRRL 1086 maitained abundant enzymes, deserving further research.

Cost-effectiveness Assessment of Commonly-used Drugs for Hepatoprotection and Enzymes Reduction Based on Decision Tree and Multi-utility Theory / 中草药·英文版

Objective: Drugs for hepatoprotection and enzymes reduction are widely used in China but their economic analysis has been ignored in a rather long period of time. A suitable protocol for hepatoprotection and enzymes reduction was recommended in Longhua Hospital. Methods: This study was conducted as a retrospective piece. Three therapeutic protocols (compound glycyrrhizic glycoside combined with aspartic ornithine injection, compound glycyrrhizic glycoside combined with phosphatidylcholine, and compound glycyrrhizic glycoside combined with tiopronin) were selected. Seventy inpatient cases from January 2011 to February 2012 were enrolled and divided into three groups according to different regimens. The cost effectiveness of the three groups was respectively evaluated by incremental cost-effectiveness ratios (ICERs). A decision tree model and multi attribution utility theory were also adopted to analyze the data. Results: All the three regimens exhibited good effects on protecting liver functions and reducing the levels of enzymes. Among them, the protocol of compound glycyrrhizic glycoside combined with tioproni expressed the least ICER, the lowest cost but the highest score in the multi-utility. Conclusion: The therapeutic method of compound glycyrrhizic glycoside combined with tiopronin is the most cost-effective option in this study.

Experimental investigation of shear bond strength on orthodontic bonding on dental fluorosis after air abrading surface preparation technique / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To find a way to having higher bond strength on mottled enamel.</p><p><b>METHODS</b>Sixty mottled enamel first bicuspid teeth extracted from fifteen patients needing orthodontic force were prepared and divided into four groups. Group A was routine acid etched, group B was air abraded, group C was etched by clearfil liner self-etching primer, group D was air abraded and then etched by clearfil liner self-etching primer. Next the bond and resin were used. The shear bond strength was observed and compared. The data were analysed by SPSS 11.5 statistical package.</p><p><b>RESULTS</b>The shear bonding strength of group A was (2.247 +/- 0.261) MPa, group B was (5.374 +/- 0.469) MPa, group C was (4.345 +/- 0.401) MPa, group D was (5.791 +/- 0.636) MPa. The strengths of four groups were significantly different (P < 0.01). The adhesive remnant index (ARI) scores of the four groups had no significant difference.</p><p><b>CONCLUSION</b>In clinic, using air abrasion surface preparation technique is an acceptable way to enhancing the shear bond strength before sticking the orthodontic bonding on dental fluorosis.</p>