Objective To evaluate the therapeutic effect of hydrogen-rich saline on allergic contact dermatitis (ACD) in mice and to explore its underlying mechanisms.Methods Forty mice were equally divided into 4 groups:control group,control treatment group,ACD group and ACD treatment group.ACD was induced by repetitive topical application of dinitrofluorobene (DNFB) to the left ear of mice on day 1,2 and 5.Hydrogen-rich saline was intraperitoneally given to the mice in the ACD treatment group at a dose of 5 ml/kg per day from day 1 to 5.On day 6,the mice were sacrificed,ear tissue was removed from them and subjected to measurement of thickness and weight,detection of tumor necrosis factor (TNF)-α,interleukin (IL)-6,IL-17 and interferon (IFN)-γ expression by enzyme linked immunosorbent assay,as well as numeration of inflammatory cells in lesions after hematoxylin-eosin (HE) staining.Data were processed by SPSS 18.0 software,and statistical analysis was carried out by one-way analysis of variance and least significant difference (LSD) procedure.Results Compared with the control group,the ACD group showed a significant increase in lesion score (7.33 ± 1.53 vs.0,P ＜ 0.05),differences in the thickness ((0.73 ± 0.15) mm vs.(0.13 ± 0.05) mm,P ＜ 0.05) and swelling degree (expressed as tissue weight:(18.67 ± 3.05) mg vs.(3.33 ± 1.52) mg,P ＜ 0.05) between the left and right ear,expressions of TNF-α ((1475.52 ± 233.81) pg/mg vs.(239.01 ± 52.39) pg/mg,P＜ 0.05),IL-6 ((184.65 ± 78.39) pg/mg vs.(42.28 ± 17.64) pg/mg,P＜ 0.05),IL-17 ((628.56 ± 201.44) pg/mg vs.(127.58 ± 50.28) pg/mg,P＜ 0.05) and IFN-γ ((197.72 ± 37.81) pg/mg vs.(24.57 ± 8.31) pg/mg,P ＜ 0.05),and the number of inflammatory cells per square millimetre in the left ear tissue (752.00 ± 166.06 vs.127.33 ± 77.18,P ＜ 0.05).However,hydrogen-rich saline treatment induced a statistical decrease in all of these parameters in the ACD treatment group compared with the ACD group,including lesion score (3.33 ± 0.58,P ＜ 0.05),difference in thickness ((0.46 ± 0.11) mm,P ＜ 0.05) and swelling degree ((11.00 ± 2.64) mg,P ＜ 0.05),expressions of TNF-α ((817.72 ± 101.13) pg/mg,P＜ 0.05),IL-6 ((95.86 ± 36.65) pg/mg,P＜ 0.05),IL-17 ((373.38 ± 126.74) pg/mg,P＜ 0.05),IFN-γ ((63.31± 17.38) pg/mg,P ＜ 0.05) and the number of inflammatory cells per square millimetre (384.00 ± 97.35,P ＜0.05).Conclusion Hydrogen may inhibit the release of inflammatory factors in ACD.

Objective:To extract, separate and identify the flavonoids in Humulus Scandens and detect their cytotoxic effect on cells HepG2. Methods: After Humulus scandens bing was extracted by alcohol, luteolin-7-O-β-D-glucoside ( LGL) and cosmoiin ( AGL) were obtained by using column chromatography and identified by spectral analysis. The inhibitory effects of LGL and AGL on HepG2 cells were detected by a typan blue dye method. Results:The main flavonoids in Humulus Scandens were LGL and AGL. When the concentration of LGL and AGL was increased from 6. 25 μmol·L-1 to 100. 0 μmol·L-1 , the inhibition rate of LGL was increased from 28. 8% to 95. 2% and that of AGL was increased from 3. 6% to 21. 3%. Conclusion: LGL has notable inhibitory effect on HepG2 cells in a dose-dependent manner, while the inhibitory effect of AGL is not obvious.

Objective To explore a method for establishing stable auditory deprived animal model of mouse.Methods Forty two-month old BALB/c mice with normal auditory brainstem response(ABR) thresholds were divided into two groups randomly.The experimental group underwent an incision inferior to the pinna,and the cochleas were destoried with a drill through the bulla bilaterally.The control group underwent only an incision without cochlea ablation.Mice were tested for ABR thresholds 4 month later to assess hearing sensitivity by comparing the ABR before and after operation.Results In the experimental group,auricle reflection disappeared after operation and ABR waves couldn't be detect.In the control group,the result of hearing test was normal.Conclusion Mouse cochlea ablation is a reliable method for establishing a stable auditory deprived animal model of mouse by the pinna inferior approach.It can be used to the research of auditory centre plasticity induced by auditory deprived.

Objective To observe the effect of hydrogen on ultraviolet B (UVB)-induced oxidative damage to skin fibroblasts.Methods Primary human skin fibroblasts from foreskin tissues were divided into five groups:normal control group receiving no treatment,hydrogen control group treated with hydrogen-rich saline,UVB group receiving irradiation only,post-treatment group irradiated with UVB followed by hydrogen-rich saline treatment,and pre-treatment group treated with hydrogen-rich saline followed by UVB irradiation.The dose of UVB was 30,60 and 90 mJ/cm2 in the cell proliferation assay and 90 mJ/cm2 in the other experiments.Methyl thiazolyl tetrazolium (MTT) assay was performed to evaluate the proliferative activity of fibroblasts,a chemiluminescence method to estimate the activity of superoxide dismutase (SOD) and catalase as well as to determine the level of malondialdehyde in the culture supernatant of fibroblasts,enzyme linked immunosorbent assay (ELISA) to determine the supernatant level of 8-isoprostane-prostaglandin F2α (8-iso-PGF2α),Western blot to detect the expression of heme oxygenase-1 (HO-1) in fibroblasts.One-factor analysis of variance was conducted to assess differences in these parameters among these groups.Results UVB irradiation decreased the proliferative activity (absorbence value at 490 nm) of fibroblasts in a dose-dependent manner.Both the pre-treatment group and post-treatment group showed a statistical increase in proliferative activity of cells compared with the corresponding UVB control groups (all P ＜ 0.05).The activity of SOD and catalase as well as the protein expression of HO-1 were significantly higher (all P ＜ 0.05),whereas the supernatant levels of malondialdehyde and 8-iso-PGF2α were statistically lower (both P ＜ 0.05) in the pre-treatment group and post-treatment group than in the UVB control group.Conclusion Hydrogen may mitigate UVB-induced oxidative damage to skin fibroblasts.

Objective To identify the genetic loci associated with bipolar disorder in Chinese population by the ge?nome scan on chromosome 20 in bipolar disorder patients and healthy people from Shandong peninsula. Method Geno?typing was conducted on DNA pool samples of 104 bipolar disorder patients and 1000 controls using thirteen microsatel?lite markers on chromosome 20 spaced at intervals of approximately 10 cM and GeneMapper 4.0 software. CLUMP soft?ware was used to analyze multiallelic markers. Result Significant difference of allele frequencies was found at marker D20S186 (20p12.2) between patients and controls (P=0.022). Conclusion The data suggest that the D20S186 locus (20p12.2) is significantly associated with susceptibility to bipolar disorder in a Chinese Han population in Shandong pen?insula. Future studies should focus on the fine mapping of this region and assessment of candidate genes.

Seeds of Bupleurum chinense cultivar, Zhongchai No. 1, were sowed in plastic pots which used the arable layer soil as the nursery bed and putted in the artificial climate incubator at various temperatures (15, 20, 25, 15-25 degrees C) and light (8,12 h) to germinate, respectively. The lower constant temperature (15 degrees ) and the higher constant temperature (25 "C) were not conducive to the sprouting characteristics of B. chinese. While they were able to enhance root activity to some extent; The seeding growth of B. chinese was significantly better in the variable temperature than correspondence in the constant temperature, significantly. The emergence speed, emergence index, vigor index and root activity of Bupleurum were improved under the 12 h of light-time, but the germination rate was not improved. The sprouting of Bupleurum's seeds could be improved to some extent by soaking with hormone, such as gibberellin, cytokinin, salicylic acid. Gibberellin promoted seeds' sprouting and seedings's root activity of Bupleurum, while salicylic acid increased the root activity of seeding. There is a significant influence of light, temperatures and hormone treatment on the germination of Zhongchai No. 1 seeds, and all three are remarkably interacted; It is beneficial to promote seed germination by the temperature (20 + 5) degrees C, lighting (8 h) and gibberellin concentration (10 x 10(-6)).
Bupleurum ; drug effects ; growth & development ; radiation effects ; Germination ; drug effects ; radiation effects ; Gibberellins ; pharmacology ; Light ; Plant Growth Regulators ; pharmacology ; Seeds ; drug effects ; growth & development ; radiation effects ; Temperature

In order to select high quality and suitable Bupleuri Radix varieties in Qingchuan, and establish a new comprehensive method to evaluation the quality of Bupleuri Radix, 12 characters of 14 samples were evaluated by DTOPSIS and grey related degree. The results showed that varieties No. 8 and No. 10 had high quality. DTOPSIS and grey related degree gave the uniformity result, and the biggest difference of value of Ci in DTOPSIS method was 46. 33% , but the biggest difference of the weighting correlation number( r (i)) in grey related degree was only 13.10%. The DTOPSIS combined with grey related degree can evaluate the quality of Bupleuri Radix comprehensively and objectively.
Bupleurum ; chemistry ; China ; Drugs, Chinese Herbal ; chemistry ; supply & distribution ; Quality Control ; Statistics as Topic ; methods

Objective To evaluate the method of PSM-mec detection by Vitek MS for nosocomialacquired methicillin-resistant Staphylococcus aureus (MRSA) identification.Methods Totally 167 isolates of MRSA and 100 isolates of methicillin-sensitive Staphylococcus aureus (MSSA) used in this research were non-repetitively and prospectively collected between June 2012 and December 2013,two different SCCmec genotyping methods were applied for the MRSA strains,Vitek MS was used for identification of the isolates,the acquisition mass-spectrogram and the result mass-spectrogram at Myla system were analyzed among the different SCCmec type of MRSA.Results The 167 isolates of MRSA were classified into 5 major SCCmec types,among which SCCmec Ⅰ accounting for 3.6％ (6 isolates);SCCmec Ⅱ 6.0％ (10 isolates);SCCmec Ⅲ and Ⅲa 84.4％ (141 isolates);SCCmec Ⅳand Ⅳ a 4.8％ (8 isolates);SCCmec Ⅴ 1.2％ (2 isolates),respectively.The peak adjacent to the horizontal axis of a m/z 2 500 could be visually identified between the SCCmec Ⅱ and Ⅲ MRSA,of which the delta toxin peak were presented at m/z 3 005-3 009 or m/z 3 037-3 056,while the strains without delta toxin peak and the other types of MRSA or MSSA had no characteristic peak at the same position.Conclusions Nosocomial-acquired MRSA of the drug-resistant condition could be rapidly differentiated and forecasted by Vitek MS.Vitek MS could serve as a routine clinical assistance for epidemiological investigations of nosocomial-acquired MRSA in local area.

Aims To extract,separate and identify the flavonoid constituents in Humulus Scandens and to ex-plore the relationship of monomers and alveolar fluid clearance (AFC)in mice in vivo.Methods Humulus scandens were extracted with alcohol and then isolated by the technology of Column and the structures were i-dentified by spectrometry.In vivo AFC was measured using bovine serum albumin protein assays affected by luteolin-7-O-β-D-glucoside (LGL ) and cosmsiin (AGL).Results The main constituents of flavanones
in Humulus scandens were LGL and AGL.Both of them could improve the AFC.Conclusion The AFCs of LGL and AGL,compared to the blank control group, increased which explains the effect of flavonoid constit-uents on removing edema and promoting water absorp-tion.

ZnO nanoparticle-containing carbon composite nanofiber ( ZnO-CNF ) was prepared by the electrospinning of the ZnCl2-PAN precursor, followed by preoxidation and carbonization. The ZnO nanoparticles were uniformly distributed on the surface of the carbon nanofiber with the size of 20-30 nm, confirmed by scanning electron microscopy ( SEM ) . The wettability of the ZnO-CNF was studied by water contact angle test. With Nafion as an additive, the ZnO-CNF modified electrode was successfully constructed by dip-coating. The surface morphology and electrochemical properties of the modified electrode were investigated by SEM and cyclic voltammetry. There was a sensitive response of the ZnO-CNF modified electrode on Pb ions in solution, demonstrated by square wave stripping voltammetry. Under the optimized conditions, a good linear relationship between peak current and Pb2+concentration was obtained in the range of 2. 4×10-10-2. 4×10-7 mol/L (R=0. 998) by 10 min preconcentration at -1. 0 V in 0. 1 mol/L NaAc buffer solution (pH=4. 6). The detection limit was 4. 8×10-11 mol/L. The practical analytical application of the ZnO-CNF modified electrode was assessed by the measurement of the actual water sample and the result was consistent with that obtained by ICP-MS.