Objective To investigate the effect of doxycycline on the Th1/Th2 cell balance in experimental allergic encepha-lomyelitis(EAE)rats.Methods Forty female Wistar rats were randomly divided into the EAE control group,low,medium and high does DOX treatment groups,10 cases in each group.The onset situation in rats was observed.The IL-4 and IFN-γlevels secreted by peripheral blood mononuclear cells (PBMC)at the peak stage were detected.The levels of IL-1β,IL-10,TNF-αin brain tissue,and the albumin content in cerebrospinal fluid and serum were detected.The QA value was calculated.Results In each DOX group,the clinical symptoms of rats were alleviated compared with the EAE control group.In each DOX group,the PBMC secreting IFN-γlev-el and IFN-γ/IL-4 ratio in the onset peak stage were lower than those in the EAE control group,while the IL-4 level was higher than that in the EAE control group(P <0.01).Compared with the medium-dose DOX group,the increase of IL-4 level in the high-dose DO group was unapparent(P >0.05),but the difference between other DOX groups had statistical significance(P <0.01).The IL-1βand TNF-αlevels of brain tissue and QA value during onset peak stage in various doses DOX groups were decreased compared with the EAE control group,while the IL-10 level was increased compared with the EAE control group(P <0.05).With the DOX dose increasing,the levels of IL-1β,TNF-αand QA value in various doses DOX groups became lower,the IL-10 level became high-er,there was statistically significant difference among various doses DOX groups (P <0.05 ).Conclusion DOX can obviously alle-viate the clinical symptoms of EAE rats,its mechanism may be related with that DOX could decrease the level of Th1 cytokine and increase the level of Th2 cytokine,correct the Th1/Th2 cell balance,thus protect the blood brain barrier(BBB).

In order to improve the interfacial bonding strength of hydroxyapatite/polyurethane implanted material and dispersion of hydroxyapatite in the polyurethane matrix, we in the present study synthesized nano-hydroxyapatite/polyurethane composites by in situ polymerization. We then characterized and analyzed the fracture morphology, thermal stability, glass transition temperature and mechanical properties. We seeded MG63 cells on composites to evaluate the cytocompatibility of the composites. In situ polymerization could improve the interfacial bonding strength, ameliorate dispersion of hydroxyapatite in the properties of the composites. After adding 20 wt% hydroxyapatite into the polyurethane, the thermal stability was improved and the glass transition temperatures were increased. The tensile strength and maximum elongation were 6.83 MPa and 861.17%, respectively. Compared with those of pure polyurethane the tensile strength and maximum elongation increased by 236.45% and 143.30%, respectively. The composites were helpful for cell adhesion and proliferation in cultivation.
Biocompatible Materials ; chemistry ; Cell Adhesion ; Cell Line ; Durapatite ; chemistry ; Humans ; Polymerization ; Polyurethanes ; Tensile Strength ; Transition Temperature

Objective To investigate the hepatoprotective effects of Paeoniae Radix Rubra (PRR) at different doses against α-naphthylisothiocyanate (α-NIT)-induced acute cholestatic hepatitis in rats.Methods Rats were ig administrated with vehicle or PRR [(1,9,18,36,54,72,and 81 g/(kg·d)] 3 d before and 2 d after α-NIT (60 mg/kg) ig administration.The general status of rats,histopathology of liver,serum alanine aminotransaminase,aspartate aminotransaminase,total bilirubin,direct bilirubin,and alkaline phosphatase levels,were observed at respective time points (24 and 48 h) after α-NIT administration.Using cluster analysis and correspondence analysis,the dose-effect-response relationships of PRR were evaluated.Results The results showed that compared with model group,the serum biochemistry index significantly decreased with the increasing of PRR dosage (P ＜ 0.01),and the change and necrosis of hepatic cellula,and inflammatory cell infiltration were gradually alleviated.However,the improvement was not obviously found in the low-dose group [1 g/(kg·d)].The cluster analysis and correspondence analysis results showed that different doses of PRR could significantly ameliorate α-NIT-induced acute cholestatic hepatitis of rats in a dose-dependent manner.Conclusion The experiments show that administration doses of PRR in clinical use should be added properly in order to gain the expectant therapeutic effect,especially in the treatment of heavy acute cholestasis hepatitis.

（《》）was written in 1827 and the author is unknown. The book has only one version which is collected by the National Library of Vietnam. The book contains one volume and includes contraindication of acupuncture and moxibustion, meridian points, point locations, indications and the therapeutic methods at extraordinary points. They are mainly cited from(《》) by,(《》) byand(《》) byin theDynasty. In the paper, in view of the characteristics of version and compilation, the hand-coped book was introduced. It was explored that Vietnam acupuncture absorbed Chinese medicine and emphasized clinical practice rather than theoretic statement.

Objective To study the regulation of Withaferin A on apoptosis-related proteins in lung squamous cell carcinoma and its effect on cell epithelial-mesenchymal transition.Methods Lung squamous cell carcinoma cell line SK-MES-1 were cultured in vitro.The SK-MES-1 cells were treated with the final mass concentration of 0 (control),5,10,20,and 40 μg/ml for 28 h,and the general morphology and shedding of the cells were observed under phase contrast microscope;MTT assay was used for detection of cell viability;flow cytometry was used for detection of apoptosis;immunofluorescence and real-time fluorescent polymerase chain reaction (RT-PCR) was used for detection of apoptosis-related proteins and genes bcl-2 and bax,and expression of the epithelial marker E-cadherin and the interstitial marker Vimentin.Results Different concentrations (0,5,10,20,40 μg/ml) of Withaferin A inhibited the activity of SK-MES-1 cells with cell viability of 0.62±0.05,0.42±0.04,and 0.33±0.06,0.21±0.03,0.17±0.04,respectively,which suggesting that this inhibition was related to the concentration of Withaferin A (F =386.505,P =0.005).After treatment with SK-MES-1 cells for 24 h at different concentrations (0,5,10,20,40 μg/ml) of Withaferin A,the apoptosis rates of each group were (0.180±0.011) ％,(0.310±0.013) ％,(0.500±0.021) ％,(0.540±0.018) ％,and (0.410± 0.027) ％,which suggesting that Withaferin A rarely caused apoptosis,mostly necrotic cells (F =1 065.78,P =0.124).In SK-MES-1 cells treated with different concentrations of Withaferin A for 24 h,the results of immunofluorescence showed that the expression of Vimentin was decreased in the experimental group at a concentration of 20 μg/ml compared with the control group,and the fluorescence intensity was lower than that of the control group,but the fluorescence intensity of E-cadherin was higher than that of the control group;the intensity did not change significantly in the experimental group with the other concentrations.While the expression levels of bax and bcl-2 proteins in the control group and the experimental group did not change significantly.RT-PCR results showed that the mRNA expression of E-cadherin (6.7±0.6 and 6.4±0.9) in the experimental group at a concentration of 20 and 40 μg/ml was significandy higher than that in the control group (4.2±1.0),and the difference was statistically significant (both P ＜ 0.05),and the mRNA expression of Vimentin (4.7±0.5 and 4.7±0.5) was significantly lower than that in the control group (7.2±0.7),and the difference was statistically significant (both P ＜ 0.05).Conclusion Withaferin A can inhibit the growth of lung squamous cell carcinoma cells and inhibit the process of epithelial-mesenchymal transition,but it has no obvious relationship with apoptosis and apoptosis-related proteins.