Object To establish a high efficient and reliable method for extraction and analysis of the diterpenoids in Pteris semipinnata L. Methods Supercritical CO 2 fluid modified with alcohol was used to extract the diterpenoids in P. semipinnata, the extracting conditions were optimized by orthogonal design method, and the modifying solvent was investigated through total ions chromatograghy normalization. A quadrupole mass spectrometer coupled with atmospheric pressure chemical ionization interface was employed as a detector for HPLC, the -1 ion was used as selective ion for the detecting of ent 11 ? hydroxy 15 oxo kaur 16 en 19 olic acid (5F) in selective ion monitoring (SIM) mode. The peak area of SIM and tolal ion chromatogram (TIC) were used for quantitative determination. As an example of its application, this method was used to determinate the content of 5F as antitumor diterpenoids in P. semipinnata. Results The optimized conditions for supercritical CO 2 fluid extraction are 25 MPa, 60 ℃, 15% methanol, flow rate 3 0 mL/min; analytical column was Diamonsil ODS (150 mm?4 6 mm, 5 ?m); the mobile phase of HPLC was CH 3CN 2 mmol/L NH 4AC (35∶65), flow rate 1 0 mL/min, injection volume 5 ?L; the standard curve showed good linearity over the range of 0 05-2 5 ?g; the limit of detection is 0 4 ng; the recovery is 97 8% (n=3). Conclusion This method is highly efficient, sensitive, and selective, which can be applied to study the antitumor drug of diterpenoids in P. semipinnata and to establish the drug standard.

OBJECTIVE:To prepare solid dispersion for increasing solubility of quercetin METHODS:Using polyvinyl pyrrolidone(PVP) as the carrier,solid dispersion of quercetin was prepared by solvent -volatilization method The solubility of the solid dispersion was detected IR spectrometer and UV spectrometer were used to investigate the physical and chemical properties of the solid dispersion RESULTS:The solubility of solid dispersion was significantly increased compared with quercetin and the physical mixture Quercetin existed as ultrafine crystalline or molecular form in solid dispersion,so there was no chemical reaction between quercetin and PVP CONCLUSION:PVP could be used as the carrier of solid dispersion to increase the solubility of quercetin in water

OBJECTIVE:To establish a method for determination of the content of quercetin in quercetin-PVP solid dis?persions.METHODS:The detection wavelength for dertermination of quercetin content was set at374nm.RESULTS:The caliberation curve was linear in the range of5.0～25.0?g/ml(r=0.9998).The average recovery was99.12%,RSD=0.70%(n=6).CONCLUSION:This method is stable,quick,accurate and simple,and is suitable for quality control of quercetin in quercetin-PVP solid dispersions.

[Objective] To observe the protective effect of Yugan Tablet (YT) on D-galactosamme-induced acute hepatic injury in mice. [ Methods ] Mice were randomly allocated to normal control group, model group, Ganpi Kang Capsule group and YT groups (low-, moderate- and high-dosage YT). Serum levels of aspartate transaminase (AST) and albumin (ALB) and clotting time (CT) were examined to evaluate the effects of YT and Ganpi Kang Capsule on mice with D-galactosamine-induced acute hepatic injury. [Results] Serum level of AST was increased ( P

BACKGROUND: There are plenty of studies of estrogen effects on mammalian osteoblast, but the studies of estrogen effects on bird osteoblast cannot be found. There are many reports about the side effects of letrozole on bone metabolism, but there are no reports about the effect of letrozole on osteoblast.OBJECTIVE: The effects of estrogen and letrozole on the proliferation, cell cycle, estrogen receptor mRNA expression and alkaline phosphatase (ALP) activity of chicken osteoblast in vitro were studied in order to illustrate the mechanism of medullary bone osteogenesis.METHODS: The osteoblasts were harvested from the frontal bone of 15-day SPF chicken embryos by the enzyme digestion, and treated with various mass concentrations of estrogen (0, 5, 10, 20, 100. 200, 400,800, 2 000, 20 000 ng/L) and letrozole (0, 5.10, 25, 50, 100, 250, 500, 1 000, 5 000 μg/L). The proliferation rates of the osteoblast treated with estrogen or letrozole were measured through the MTT method, The ALP activities of osteoblast were measured by the pNPP method. The cell cycle was measured by flow cytometry. The expression of estrogen receptor mRNA was detected using real-time fluorescent quantitative polymerase chain reaction (PCR).RESULTS AND CONCLUSION: The estrogen could promote proliferation of osteoblast in concentration- and time-dependent fashion. Estrogen could increase the expression of estrogen receptor mRNA, impulse cell cycle, and elevate ALP activities.Letrozole could increase the cell population, impulse cell cycle, inhibit estrogen receptor mRNA expression, but letrozole has no effects on ALP synthesis and secretion.

The legitimate rights of mental health workers don't get expected protection,which has caused negative influence on the development of mental health work.By introducing the Gantt v.Arnie Sethcase,we an-alyzed the law applicable disputes of doctors who are hurt by the patients with mental disorders,and made legal e-valuation on the views of relevant responsibility identification at home and abroad,and attempted to come up with some suggestions on construction of legitimate interest safeguard mechanism for mental-health workers from the as-pects of legislation and administrative policy.

Objective:To investigate the inhibitory effect of perillyl alcohol (PA) on the proliferation and invasion of tung cancer cell A549,and the influence of PA on tumor angiogenesis was studied.Methods:Different concentrations of PA and erlotinib were added into lung cancer cell A549,the inhibiting effect of drug group on lung cancer cell A549 was found by MTT assay.The inhibiting effect of PA on lung cancer cell A549 invasion was measured by Transwell assay.ROS changes of PA on lung cancer cell A549 was detected by fluorescent.Influence of PA on Caspase-3 activity of lung cancer cell A549 was measured by spectrophotometry,VEGF,HIF-1 α,COX-2 expression in lung cancer cell A549 was measured by Western blot,and the NF-κB activity of lung cancer cell A549 was measured by EMSA.Results:Compared with blank control group,cell growth inhibition rate of PA and erlotinib on lung cancer cell A549 was increasing with the increased concentrations (10,50,100 μ,g/ml),the difference was statistically significant (P＜ 0.05),the invasion ability of lung cancer cell A549 was decreased continuously,the difference was statistically significant (P＜0.05).The ROS level of lung cancer cell A549 had no obvious change with the increasing density of erlotinib,but obviously increased with the increasing concentrations of PA (10,50,100 μg/ml).With the increasing concentrations of PA,the expression of COX-2,VEGF and HIF-1α were continuously decreased.EMSA assay showed that NF-κB was continuously decreased with the increasing concentrations of PA.Conclusion:The antitumor mechanism of PA on lung cancer cell A549 might be related to increase the expression level of ROS and reduce the expression of activity of NF-κB,COX-2,VEGF and HIF-1α with angiogenesis signaling pathway.

Objective:To investigate the exression of miR-34a on lung cancer and normal lung tissues,and the effect and mechanism of miR-34a in lung cancer cell invasion and migration.Methods: qPCR was used to detect the expression of miR-34a on lung cancer.miR-34a-mimic and miR-34a-inhibitor were used to overexpress and knockdown miR-34a.qPCR was used to detect the effectiveness.Western blot was used to detect the expression of Snail after induced with miR-34a-mimic and miR-34a-inhibitor.Luciferase reporter gene was used to detect interaction between miR-34a and Snail.Transwell invasion assay was used to detect invasion ability after induced with miR-34a-mimic and miR-34a-inhibitor.Scratch assay was used to detect migration ability after induced with miR-34a-mimic and miR-34a-inhibitor.The expression of E-cadherin,Vimentin and Twist were detected by Western blot.Results: miR-34a expression was significantly reduced in lung cancer.With the stage of lung cancer progression,the expression of miR-34a reduced.With the differentiation of lung cancer progression,the expression of miR-34a decreased.Decreasing of miR-34a was associated with lung cancer lymph node metastasis.miR-34a-mimic and miR-34a-inhibitor could overexpress and knockdown miR-34a.miR-34a could regulate expression of Snail.Snail was the direct target of miR-34a;miR-34a could regulate the invasion ability of human lung carcinoma H1650 cells;miR-34a could regulate the migration of human lung carcinoma H1650 cells;miR-34a could regulate the expression of E-cadherin,Vimentin and Twist.Conclusion: miR-34a plays the role of tumor suppressor factor in lung cancer.miR-34a can regulate the invasion and migration ability of lung carcinoma H1650 cells by Snail induced EMT.

AIM To find a new method for purifying the active compound 5F isolated from Pteris semipinnata L.(PsL ) and observe its enhanced cytotoxicity when combined with other antitumor agents. METHODS Silica gel combined with AgNO 3 was made to purify 5F. Cytotoxicity was detected with trypan blue dye exclusion assay. RESULTS After purification, the concentration of compound 5F in purified products was higher than 99%. The inhibitory rates of 5F combined with 5 Fu or CDDP or VCR were higher than that of these drugs used alone. CONCLUSIONS Compound 5F could be purified effectively using silica gel combined with AgNO 3. 5F could enhance the cytotoxicity on HL 60 and K562 cells of the drugs mentioned above. The different effect of these agents on the various phases of cell cycle kinetics may explain the enhanced effect of 5F.

Aim To study the effect of 5F on tubulin polymerization.Methed 5F was added into the tubulin polymerization-depolymerization system and the changes of Absorption values at 350 nm, 37 ℃ were recorded. Results 5F decreased the Absorption values of the reaction system.and markedly inhibited not only tubulin polymerization but also tubulin depolymerization. Conclusion 5F inhibits tubulin polymerization and depolymerization, and leads to cell cycle arrested, and possibly induces apoptosis.