Objective To establish the method of acetaldehyde and acraldehyde in water with headspace gas chromatography. Methods Acetaldehyde and acraldehyde in the water samples were extracted by headspace technology,then analyzed with DB-624 capillary column. In the same time,they were determined with GC by controlling the temperature. Retention time of the peaks was used for qualitative analysis,while external standard method was used for quantitative analysis. Results In 3.0-250 ?g/L, the regression equation for acetaldehyde was y=406.83 x+0.847,r=0.999 9,the lowest detection limit was 1.0 ?g/L. In 6.2-500 ?g/L, the regression equation for acraldehyde was y=207.53 x-0.450,r=0.999 8,the lowest detection limit was 3.3 ?g/L. The rates of recovery were 90.0%-95.5%,and RSDs were 2.1%-3.7%. Conclusion This method is simple,rapid,sensitive and is applicable to the determination of acetaldehyde and acraldehyde in water.

BACKGROUND:Studies have shown that bone marrow mesenchymal stem cel transplantation can improve disease conditions by reducing inflammation.
OBJECTIVE:To explore the therapeutic efficacy of bone marrow mesenchymal stem cels on chronic asthma rats.
METHODS: A rat model of chronic asthma was established by intraperitonealy injected and aerosolized ovalbumin. After modeling, rats were given 4×105 and 8×105 bone marrow mesenchymal stem celsvia the tail vein, respectively. Thirty days later, the lung tissues were observed pathologicaly using hematoxylin-eosin staining; RT-qPCR and ELISA methods were employed to test the changes in interleukin-10, tumor necrosis factor-α and interferon-γ levels in lung tissue and peripheral blood, respectively.
RESULTS AND CONCLUSION:Rat models of chronic asthma were successfuly established after intraperitoneal injection of ovalbumin combined with aerosolized ovalbumin. After 30 days of cel treatment, the structure of lung tissues were obviously recovered, and the levels of interleukin-10, tumor necrosis factor-α and interferon-γ showed some improvement in lung tissue and peripheral blood, but there were no differences between the two groups. In conclusion, bone marrow mesenchymal stem cels show some potential role in the treatment of chronic asthma.

Alzheimer's disease is a common neurodegenerative disease. One of the main pathology is neurofibrillary tangles in neurons,in which principal component is the phosphorylation of tau protein. Previous studies focused on senile plaques and Aβ levels. Recent studies indicated that the development of tau protein closely associated with Alzheimer's disease, especially the abnormal phosphorylation. This paper reviewed the relationship between tau protein phosphorylation and Alzheimer's disease based on the perspective of protein kinases and phosphatases.

Objective To study the effect of small dose mifepristone in the treatment of uterine fibroids.Methodsfrom January 2013~2015 year in January 100 cases of uterine fibroids were treated in Yiwu Maternal and Child Health Care Family Planning Center as the research object in the course of the study, patients began taking mifepristone in menstruation third days to 5 days, taking a total of 6.5 months, after the observation of its long-term use of low-dose mifepristone after treatment, changes in sex hormone the level of the effect of low-dose mifepristone in the treatment of patients with uterine fibroids and patients in the body, including the effects on the endometrium.The clinical symptoms and signs, the changes of hormone levels and the results of B-ultrasound were followed up.ResultsAll of the 100 patients were treated with low dose mifepristone for a period of time, all of them had amenorrhea.Before treatment, the level of estradiol in patients was (298.5±156) pmol/L, and the level of progesterone (2.8±1.3) was pmol/L.After 6.5 months of treatment, the level of estradiolof the patients was(228.4±114)pmol/L, and the level of progesterone(1.3±0.5)pmol/L was pmol/L.The results showed that the levels of progesterone and estradiol in patients after treatment were significantly lower than those before treatment, with statistical difference (P<0.05).There was no significant change in endometrial thickness after long-term low-dose mifepristone treatment (P>0.05).After treatment, the total effective number of cases was 92 cases, the effective rate was 92%.ConclusionSmall dose of mifepristone for uterine fibroids clinical treatment effect is good, to a large extent, improve the effective rate of treatment and high safety, with the clinical significance of further promotion and application.

Objective To observe the changes of CD4+CD25+ regulatory T cells in the spleen of mice infected with T.gondii. Methods Twenty-eight female C57BL/6 mice were randomly divided into four groups. Three groups of mice were inoculated intraperitoneally with 104 tachyzoites in 200 ?l sterile PBS. At 2, 4 and 6 days post-infection, the spleens were removed. The expression level of Foxp3 mRNA in splenic CD4+ T cells was quantitated by real-time PCR. The percentage of CD4+CD25+ regulatory T cells in CD4+ T cells was determined by flow cytometry, and the absolute numbers of splenic CD4+CD25+ regulatory T cells and CD4+ T cells were assessed. The fourth group was injected intraperitoneally with 200 ?l sterile PBS as control. Results The relative mRNA level of Foxp3 in splenic CD4+ T cells at day 4 (1.89?0.23) and day 6 (1.79?0.24) post-infection was significantly higher than control (1.00?0.12)(P

Objective To explore the effect of culture supernatant of Toxoplasma gondii on CD4+CD25+ T cells in mice in vitro. MethodsCD4+CD25+ T cells were separated from spleens of C57BL/6 mice and incubated in the culture superntant of Toxoplasma gondii. The apoptosis percentage of the CD4+CD25+ T cells were detected by FACScan, and the suppression of the CD4+CD25+ T regulatory cells were examined by 3H-TdR incorporation. ResultsCompared with the CD4+CD25+ T cells incubated with RPMI-1640, (36.90?0.36)% CD4+CD25+ T cells took apoptosis after incubated with the culture supernatant of Toxoplasma gondii for 10 hours,and the Annexin-v positive rate increased by (13.60?2.15)%. Compared with RPMI-1640, the culture supernatant of Toxoplasma gondii incubating the CD4+CD25+ T regulatory cells for 5,10 hours reduced their suppressive potential on the proliferation of the CD4+CD25- T cells significantly. ConclusionsSome composition of the culture supernatant of Toxoplasma gondii might cause apoptosis of CD4+CD25+ T cells and as a result, could reduce their suppression on CD4+CD25- T cells.

Objective To prepare liposomes of glycyrrhizic acid, and evaluate its liver targeting property in mice. Methods The liposomes were prepared with conventional rotary-evaporated film-ultrasonication method.The liposomes were injected into the mouse tail vein, and the concentration of glycyrrhizic acid was detected by RP-HPLC.The glycyrrhiz-ic acid injection was taken as control.The targeted indicators, including the relative tissue exposure ( re ) , targeting effi-ciency (te), and index of peak concentration ratio (Ce), were used to evaluate the liver targeting property.Results The re was 1.4, Te of the liposomes was 0.092, and te of the injection was 0.059.The Ce of the liver was 1.59, and the Ce of the blood was 0.99.Conclusion Compared with glycyrrhizic acid injection, the glycyrrhizic acid liposomes show good liv-er-targeting property.

BACKGROUND:During the outbreak of severe acute respiratory syndrome(SARS),certain people had been isolated by various reasons and appeared a series of psychological, physical and behavioral reactions. OBJECTIVE:To understand the different defensive features in people with different level of mental health in the isolated population, and explore the relationship between defensive style and mental health. DESIGN:An in investigative study taking the isolated population during outbreak of SARS as the subjects. SETTING:A psychiatric department of a military hospital. PARTICIPANTS:Totally 187 people of different sex,age and education, who were isolated during April and May 2003 due to SARS outbreak in a city of northwest China,were selected as the subjects. INTERVENTIONS:The 187 subjects,who were isolated due to SARS outbreak,were evaluated by using the symptom checklist(SCL 90) and defense style questionnaire(DSQ). RESULTS:About 36.4% people of this population had distinct mental or physical health problems that were characterized by anxiety,horror,depression,hostility and compulsion.There was difference in defensive styles between the high symptom group and low symptom group,among which the score of DSQ factors in the immature type of high and low symptom groups were 5.72± 1.56 and 4.35± 0.96 respectively while the scores in the intermediate type defense were 4.98± 1.44 and 3.72± 0.89 respectively(P< 0.01).Mental health problem was positively correlated with the application of immature defensive style,but had negative correlation with application of mature defensive means. CONCLUSION:There is difference in the defensive styles among the isolated people with different mental health status,and their defensive strategies are closely related to the mental health.

Objective To investigate the effect of soluble endothclial protein C receptor(sEPCR) on natural killer(NK) cells and Th17 cells of epithelial ovarian cancer(EOC) patients and further to study the mechanism of the occurrence and development of epithelial ovarian cancer.Methods 35 cases with epithelial ovarian cancer were selected as the experimental group,and 35 healthy women were chosen as the control group.Peripheral venous blood sample(8 ml)was extracted from each subject.Plasma,serum and peripheral blood mononuclear cells(PBMCs) were obtained from the blood sample.ELISA was used to detect the level of plasma sEPCR and serum IL-17 and IL-21.Flow cytometry was used to detect proportions of NK cells and Th17 cells in PBMCs.Results Compared to the control group,the level of plasma sEPCR in the experimental group increased significantly(P ＜ 0.05).The level of serum IL-17,IL-21 and proportion of NK and Th17 cells in PBMCs significantly decreased(P ＜ 0.05).Correlation analysis showed that sEPCR was negatively correlated with IL-17,IL-21,Th17 cells and NK cells,and the correlation coefficient r was-0.71,-0.62,-0.68 and-0.79,respectively.Conclusion sEPCR in epithelial ovarian cancer patients possibly promotes the proliferation of tumor cells through inhibition of NK and Th17 cells.

Aim To investigate the effect of the total flaconoids extracted from Xiaobuxin-Tan g ( XBXT-2 )
on the hyperactivity of hypothalamic-pituitary-adrenal axis in mouse learned helplessness model. Methods Learned helplessness was induced by inescapable foot shock stress over 1h session for 5 days. After screen-ing, we divided learned helplessness mice into five groups:IS, inescapable shock;Dlx, dulxetine(20 mg ·kg-1);XBXT-2(25,50 mg·kg-1). Latency to es-cape shocks and escape failure had been recorded. During the test, Dlx(20 mg·kg-1 ) and XBXT-2(25, 50 mg·kg-1 ) were administered intragastrically once daily for four days. Serum corticosterone level and ad-renocorticotropic hormone ( ACTH ) level were meas-ured by ELISA, and expression of glucocorticoids re-ceptor ( GR) α/β and brain-derived neurotrophic fac-tor ( BDNF ) in hippocampus was determined using Western blot method. Results XBXT-2 (25,50 mg·
kg-1 ) or duloxetine treatment showed antidepressant effect in mouse learned helplessness model, as demon-strated by the decreased escape failure and escape la-tency. Our ELISA results showed that XBXT-2 or du-loxetine significantly decreased serum corticosterone level and its upstream stress hormone ACTH level in learned helplessness mice. Furthermore, Western blot result demonstrated XBXT-2 treatment increased GRs and BDNF expression in hippocampus. Conclusions XBXT-2 produces significant antidepressant effect on learned helplessness mice. In addition, the modulation of HPA axis produced by XBXT-2 may be important mechanism underlying its antidepressant-like effect in mouse learned helplessness model.