Five compounds were isolated from the rhizome and roots of Rhodiola crenulata S.H.Fu.They werc identified as rhodionin (Ⅰ), rhodiosin(Ⅱ), tyrosol(Ⅲ), salidroside(Ⅳ) and gallic acid (Ⅴ), respectively, by UV, MS, 1H and 13CNMR spectroscopic and chemical reactions.

Objective:To examine the plasma soluble interleukin 2 receptor (sIL-2R)and the expression of IFN-γR in helper T (Th)cells in peripheral blood of patients with recurrent oral ulcer(ROU).Methods:The peripheral blood was obtained from 21 pa-tients in active stage of ROU and 21 healthy controls.Flow cytometry was used to detect the quantity of IFN-γR in CD +4 T cells,ELISA was used to detect the level of sIL-2R.Results:The expression of IFN-γR in CD +4 T cells and sIL-2R content in plasma of the patients with ROU were significantly higher than those in the healthy controls(P <0.05).Conclusion:Over expression of IFN-γR in CD +4 T cells and sIL-2R in peripheral blood may be related to the genesis of ROU.

The construction of biosafety laboratory was highly concerned these years because of the spread of high pathogenic diseases including SARS and avian influenza. In the past several years, the construction of many BSL-2/3 laboratories played an important role in preventing the dissemination of pathogens involved in the research. Meanwhile, serious problems were also raised because some project designers or constructors were not clear with the compulsory safety equipments in these laboratories so that the requirement of zero-leakage could not be achieved. The compulsory safety equipments emerging and disposing solid, liquid and gas offal in the biosafety laboratory were reviewed. The R&D of special equipments in biosafety laboratory in China was also introduced.

Aim To explore the effeet of puerarin (Pue) on aortic function and blood pressure in hyper-tensive mice induced by high-fat diet.Methods Thirty male mice were divided into five groups named as normal diet group ( Con ) , high-fat diet group (1)10), high-fat diet + low-dose puerarin group (20 mg 'kg-1 •(!"'), high-fat diet + medium-dose puera¬rin (40 mg • kg"1 • d ~1 ) group and high-fat diet + high-dose puerarin group (80 mg 'kg-1 • d~l).Hie mice were injected intraperitoneally with Pue for eight weeks.Body weight, blood pressure and blood glucose were measured.Serum was collected to detect blood lipid.Aortas were separated from aortic endothelial cells to test the vasodilative function.Aortic endotheli¬al cells from 1)10 mice were isolated to perform Iran-swell and cell proliferation experiments.Results I High-rlose puerarin treatment could reduce the body weight, body fat, blood glucose and blood pressure in obese mice ( P < 0.01 ) ; 2 High dose of puerarin could improve the vasodilative function of aortas com¬pared with those from 1)10 mice (P <0.01 ) ; (3) The migration ability of primary endothelial cells from 1)10 + Pue group was improved compared with that from 1)10 group (P <0.01 ).Conclusions Puerarin can significantly reduce blood pressure in obese mice in¬duced by high fat diet by improving the aortic diastolic function and endothelial cell proliferation and migra-tion.

Aim To investigate the effect of vaccarin on mouse atherosclerosis in vivo and the underlying mechanism. Methods AopE mice aged 6 to 8 weeks old were used to establish the atherosclerosis model. Oil red O staining was used to determine the lipid levels in aorta and aortic root. Enzyme linked immunosorbent assay (ELISA) was used to detect the levels of serum inflammatory factors. Results Vaccarin could effectively reduce the levels of blood glucose and blood pressure in AopE

Aim To investigate the effects of TRPV4-Nox2 complex on ROS production and aortic vasodilatory function in mice fed with high-fat diet.Methods Male C57 BL/6J mice and TRPV4 KO mice were randomly divided into seven groups, with 10 mice in each group: normal diet group(ND), high-fat diet group(HFD), TRPV4 KO mice fed with high-fat diet group(TRPV4 KO-HFD), HFD+AAV-Flt1-Vector/Nox2 ▵3 group, TRPV4 KO-HFD+AAV-Flt1 -Vector/Nox2 ▵3 group.Body weight and blood pressure were recorded.14 weeks later primary aortic endothelial cells were isolated for CM-H2DCFDA staining and immuno-FRET assay, and aortic rings were isolated for vascular tone assay.Results ① Obesity significantly increased ROS production, triggered vasodilatory dysfunction and increased the strength of physical coupling between TRPV4-Nox2 complex(P<0.05); ② Decreasing the physical association of TRPV4-Nox2 complex could help reduce obesity-induced increased ROS production and vasodilatory dysfunction(P<0.05); ③ Entrectinib had no effect on the expression and function of TRPV4 and Nox2, but only decreased the physical association of the TRPV4-Nox2, which in turn improved obesity-induced oxidative stress and restored vasodilatory function.Conclusions Reducing the physical association of TRPV4 and Nox2 through Entrectinib can help reduce obesity-induced increase in ROS production and improve vasodilatory function of obese mice.

Objective: Objective To evaluate the effect of repairing posterior teeth with subgingival defects with onlays after deep margin elevation and to provide a reference for clinical application. Methods : Eighty-six cases of posterior teeth with subgingival defects were treated with resin filling to elevate the subgingival margin to the superior gingival margin and were then restored with onlays of cast porcelain. Patients were followed up at 1 week, 6 months and 12 months. The wear and tear of the restorations, fractures of the restorations, loss of the restorations, marginal closeness, marginal staining, secondary caries and gingival health were examined. Assessment of efficacy with reference to American public health service standards was conducted. Results : One week after the operation, there was no loss of follow-up. Eighty-six cases of onlays had no prosthetic wear, prosthetic fracture, prolapse of the prosthesis, edge adhesion, edge coloration, secondary caries, etc., and the gums were healthy. At 6 months after surgery, 2 patients were lost to follow-up and 4 of the remaining 84 onlays were detached. After re-adhesion, there was no shedding. At 12 months after surgery, 5 cases were lost to follow-up and 81 cases of onlays demonstrated no further prosthetic wear, prosthetic fracture, prolapse of the prosthesis, edge adhesion, edge coloration, secondary caries, etc., and the gums were healthy. The success rate after 12 months of repair was 95.1% (77/81).Conclusion For posterior teeth with a subgingival defect, onlays of cast porcelain have the advantages of a high success rate, co Conclusion For posterior teeth with a subgingival defect, onlays of cast porcelain have the advantages of a high success rate, convenient clinical operation and no influence on periodontal health to restore posterior teeth after deep margin elevation.

OBJECTIVE:To optimize the extraction technology of glucosinolates from Uighur medicine Brassica rapa L.. METHODS:Ethanol refluxing method was adopted to extract glucosinolates from Uighur medicine B. rapa L.. With the comprehen-sive score of glucosinolates and dry extract yield as the index,L9(34)orthogonal test based on the single factor test was adopted to observe the effects of ethanol volume fraction,extraction time and material-liquid ratio on the extraction technology of glucosino-lates from B. rapa L.,and verification test was conducted. RESULTS:The optimal extraction technology was to add 95% ethanol 8 times as much as the amount of the herbs,twice for 1.0 h reflux extractions. The extraction amount of glucosinolates and dry ex-tract yield were 7.36 mg/g and 25.29% at average,respectively.The comprehensive score of RSD was 0.52%(n=3). CONCLU-SIONS:The optimal extraction technology is stable and feasible and can be used for the extraction of glucosinolates from B. rapa L..

Diacylglycerol (DAG) is an intermediate product in lipid metabolism and plays an important physiological role in human body. It is mainly prepared by hydrolyzing lipid with lipase. However, research on the detection method of 1, 2-diacylglycerol (1, 2-DAG) and 1, 3-diacylglycerol (1, 3-DAG) and catalytic specificity of lipase was not enough, which limits its wide application. To address these challenges, an efficient quantitative detection method was first established for 1, 2-DAG (0.025-0.200 g/L) and 1, 3-DAG (0.025-0.150 g/L) by combining supercritical fluid chromatography with evaporative light scattering detector and optimizing the detection and analysis parameters. Based on the molecular docking between Thermomyces lanuginosus lipase (TLL) and triolein, five potential substrate binding sites were selected for site-specific saturation mutation to construct a mutation library for enzyme activity and position specificity screening. The specificity of sn-1, 3 of the I202V mutant was the highest in the library, which was 11.7% higher than the specificity of the wild type TLL. In summary, the position specificity of TLL was modified based on a semi-rational design, and an efficient separation and detection method of DAG isomers was also established, which provided a reference for the study of the catalytic specificity of lipase.
Humans ; Diglycerides ; Molecular Docking Simulation ; Binding Sites ; Catalysis ; Lipase/genetics*

In order to improve transformation efficiency of phytosterols into 9α-hydroxylation of 4-androstene-3,17-dione (9α-OH-AD) by Mycobacterium sp. LY-1, we studied the strains breeding using atmospheric and room temperature plasma (ARTP) technology and optimized their conversion process. A high production strain named C33 with a good genetic stability was selected and the product molar yield reached to 15.5%, 34.8% higher than that of original strain with 15 g/L phytosterols. Furthermore, the fermentation medium was optimized through the design of orthogonal experiment. Besides, oil-water bidirectional transformation system was set up to improve the 9α-OH-AD molar yield of mutant strain C33. With adding 12 mL soybean oil to each 1 g phytosterols, the molar yield of 9α-OH-AD reached 47.0%, which increased twice than that of control (15.5%).