An enrichment culture showing specific algae-lysing activity was isolated from the mixtures of different samples and Microcystis aeruginosa. The process of algal lysis was monitored by chlorophyll measurement, PCR, and denaturing gradient gel electrophoresis (DGGE). The result showed that the enrichment culture had still high algicidal activity against M. aeruginosa after 1/100000 dilution. Rubritepida sp. C1, Pseudomonas sp. C2 and Sphingomonas sp. C3, as accompanying bacteria, existed in M.aeruginosa. The bacterial community in M. aeruginosa showed significant change after adding the enrichment culture, where uncultured Flavorbacterium sp. A2, Sphingomonas sp. C3 and Hydrogenophaga sp. A3 were observed, and A2 became a dominant species. The obvious correlation can be seen between change of bacterial population and extinction of M. aeruginosa. Compared identification of pure bacterium with sequencing of DGGE band, it was inferred that uncultured bacteria were probably play an important role in controlling the growth and abundance of M. aeruginosa.

OBJECTIVETo investigate the value of MRI follow-up in pediatric patients with spinal tuberculosis.

METHODSFrom February 2004 to April 2013, MRI imaging data in 21 children with spinal tuberculosis by pathologically and clinically proven were retrospectively analysed. There were 11 males and 10 males, with an average age of 9.4 years old ranging from 2 to 14 years old. Eighteen patients were received conservative treatment, 3 patients were treated by surgical operation. The course of disease ranged from 2 months to 3 years. All cases underwent two or more MRI examinations for follow-up. MRI findings of the first and second examination were comparatively analyzed,including signal changes of vertebral body and intervertebral, paraspinal abscess and the change of kyphosis angle.

RESULTSIn the 21 cases with tuberculosis, 85 vertebral bodies were affected in total, including 10.6%(9/85), 49.4%(42/85) and 40%(34/85) vertebral bodies separately in the cervical,thoracic, lumbosacral spine. Follow-up MRI showed vertebral body shape and signal had no obvious change during or after treatment, 15 cases with vertebral bodies changed flat or cuneate, 10 cases with disc involvement,and intervertebral space became narrowing at different level. Among 13 patients with kyphosis angle greater than 0°, 7 were located on thoracic, 2, 3, 1 were on thoracolumbar, lumbar and cervical spine, respectively. Among 18 cases with conservative treatment,kyphosis angle were 0° on the first and the follow up MRI of 8 patients. One case of mild (<10°) kyphosis,follow-up MRI during therapy showed the angle slightly increased; 5 cases with moderate (10° to 30°), follow-up MRI during therapy showed no obvious change; 4 cases with severe (>30°), follow-up MRI during and after therapy showed kyphosis increased in varying degrees.

CONCLUSIONFollow-up MRI can make a big difference in the spinal tuberculosis of children; it can clearly show the change of the vertebral body and intervertebral space, paraspinal abscess and the kyphosis angle after the treatment,which can provide reference for clinical treatment and estimating prognosis.

Adolescent ; Anti-Bacterial Agents ; therapeutic use ; Child ; Child, Preschool ; Drug Monitoring ; Female ; Follow-Up Studies ; Humans ; Magnetic Resonance Imaging ; Male ; Radiography ; Retrospective Studies ; Spine ; diagnostic imaging ; Tuberculosis, Spinal ; diagnostic imaging ; drug therapy ; surgery

Animals ; Brain-Derived Neurotrophic Factor ; metabolism ; Hypothalamus ; metabolism ; Male ; Physical Conditioning, Animal ; physiology ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo develop an HILIC method for determination of dencichine in Sanqi tablet and evaluate the quality of Sanqi tablet of different hatches from various manufactures in the market.

METHODThe chromatographic separation was conducted on a Thermo HILIC column (4.6 mm x 250 mm, 5 microm) kept at 25 degrees C with acetonitrile and 0.1% H3PO4 (60:40) as the mobile phase. The flow rate was set at 1 mL x min(-1) and the detection wavelength was set at 213 nm.

RESULTThe contents of dencichine in Sanqi tablet ranged from 1.60 to 4.31 mg x g(-1).

CONCLUSIONThe well established method was successfully applied to determine dencichine in Sanqi tablet. The results demonstrated that this method was simple, accurate and could be applied for quality control of Sanqi as well as its associated preparations.

Amino Acids, Diamino ; analysis ; Chromatography, Liquid ; methods ; Drugs, Chinese Herbal ; chemistry ; Tablets

Objective To evaluate the clinical and biochemical characteristics of pregnant women with different glucose tolerance status,and their secretion characteristics of insulin,glucagon and glucagon-like peptide-1 (GLP-1) after oral glucose challenge.Methods We analyzed 74 cases pregnant women with positive results of 50 g glucose challenge test in 24-28 gestational weeks,who received regular obstetrical follow-up in Peking Union Medical College Hospital from January 2009 to June 2012.A further 100 g oral glucose tolerance test (OGTT) was performed,based on which the included women were divided into three groups,namely gestational diabetes mellitus (GDM) group (n =25),impaired glucose tolerance (IGT) group (n =25) and normal glucose tolerance (NGT) group (n =24).The general clinical data and biochemical indexes of the three groups were compared,and the indexes about insulin resistance and the function of pancreatic islet beta cells were calculated.Glucose,insulin,glucagon and GLP-1 were measured in OGTT.The secretion characteristics of each of these hormones and their correlation with other indicators were evaluated.Results Compared with the NGT group,the GCT [(9.21 ±0.75) mmol/L vs.(8.52 ±0.50) mmol/L,P ＜0.05] and glycosylated hemoglobin A1c [(5.39±0.34)％ vs.(5.18 ±0.20)％,P＜0.05] were significantly higher in the GDM group.In OGTT,the area under curve (AUC) of glucose in the GDM group was significantly higher than that inthe IGT group and NGT group [(26.58 ±2.02) mmol/(L · h) vs.(23.20 ± 1.51) mmoL/(L · h),(26.58 ± 2.02) mmol/(L · h) vs.(19.84 ± 1.95) mmol/(L · h),both P ＜ 0.05].The peak values of insulin secretion in the GDM group and IGT group were delayed to 2 hours after OGTT.The 3-hour insulin level in the GDM group was significantly higher than that in the NGT group (P ＜ 0.05).Compared with the NGT group,the glucagon levels in each time point after OGTT and the AUC of glucagon levels were reduced in the GDM group and the IGT group,but with no significant differences.The peak glucagon levels in the 3 groups all appeared at 3 hours after OGTT.The GLP-1 levels in each time point of OGTT were gradually increased from the NGT group to the IGT group to the GDM group,but no significant differences were found.The peak value of GLP-1 level was presented at 1 hour after OGTT in the NGT group and the IGT group and at 2 hours after OGTT in the GDM group.The valley values of GLP-1 level in the 3 groups all appeared at 3 hours after OGTT.In comparison with the NGT group,the ratios of GLP-1 to blood glucose levels (GLP/BG) at 1-hour and 2-hour were significantly decreased in the GDM group (P ＜ 0.05).The AUC of glucagon levels in OGTT were negatively correlated with fasting blood glucose (r =-0.287,P =0.013) and 1-hour glucose levels (r =-0.266,P =0.022) in OGTT and positively correlated with insulin secretion sensitivity index (ISSI) (r =0.297,P =0.010) and HOMA-β (r =0.236,P =0.043).Moreover,the AUC of GLP-1 levels in OGTT was negatively correlated with the levels of C-reactive protein (r =-0.264,P =0.035).The AUC of GLP/BG in OGTT was positively correlated with ISSI (r=0.406,P＜0.001).Conclusions Pregnant women with GDM and IGT in the second trimester have insulin resistance and dysfunction of pancreatic islet β cells.Potential GLP-1 resistance and inadequate secretion may exist in GDM patients.GLP/BG may be a better parameter to evaluate the secretion function of L cells in pregnancy and an effective parameter to estimate the compensatory function of pancreatic β cells indirectly.Glucagon levels may not start to change obviously before 28 gestational weeks.

Polymyxin E shows effective treatment of the infection induced by resistant gramnegative bacteria, but its nephrotoxicity severely limits the clinical application of this drug. In this work, methoxypolyethylene glycols 2000 (mPEG2K)-polymyxin E (PME) was synthesized via chemical grafting reaction and had been characterized. The antimicrobial activity and cytotoxicity of mPEG2K-PME in vitro were investigated on Escherichia coli and HK-2 cells, separately. Intra-abdominal infection model was further established in order to study the therapeutic effect and the toxic effect on kidney of mice. The results showed that mPEG2K-PME exhibited significant inhibitory effect on Escherichia coli and had a lower toxicity on HK-2 cells in vitro. At the same time, mPEG2K-PME had a good efficacy in the treatment of Escherichia coli infected mice in vivo. Moreover, nephrotoxicity caused by mPEG2K-PME was significantly reduced compared to free PME. mPEG2K-PME is promising in development of new preparations with high efficiency and low toxicity.

Objective To evaluate clinical features,insulin sensitivity and β-cell function of pregnant women with different glucose tolerance status,so as to identify the possible risk factors for adverse pregnancy outcomes in women with gestational diabetes mellitus (GDM).Methods We retrospectively analyzed the clinical data of 360 pregnant women with positive results of 50 g glucose challenge test who received antenatal care and admitted for delivery in the period from January 2009 to June 2012 in Peking Union Medical College Hospital.According to the result of 100 g oral glucose tolerance test (OGTT),the 360 women were divided into GDM group (n =83),impaired glucose tolerance (IGT) group (n =75),and normal glucose tolerance (NGT) group (n =202).The blood glucose level in all those women was controlled in normal range for gestational period.We compared the general clinical data,biochemical indexes,insulin resistance index,insulin sensitivity index,function index of islet β-cell,first-and second-phase insulin secretion,insulin secretion-sensitivity index as well as the pregnancy outcomes of the 3 groups,analyzing the possible risk factors for adverse pregnancy outcomes in women with GDM.Results Compared with the NGT group,the pregnant women in GDM group were older [(33.1 ± 3.7) years vs.(31.7 ± 3.4) years,P =0.008],had higher systolic blood pressure [(115.8 ± 9.7) mmHg vs.(111.4 ± 13.5) mmHg (1 mmHg =0.133 kPa),P =0.031] and diastolic blood pressure in first trimester [(75.4 ±9.0) mmHg vs.(71.8 ±8.8) mmHg,P =0.010],higher positive rate of family history of diabetes in first-degree relatives (37.3％ vs.22.3％,P =0.012),positive rate of insulin therapy (10.8％ vs.0％,P =0.001),serum triglyceride level [(2.8 ±0.9) mmol/L vs.(2.3 ±0.9) mmol/L,P =0.001],free fatty acid level [(486.7 ± 137.6) μmol/L vs.(438.1 ± 140.7) μmol/L,P =0.033],and C-reactive protein level [(5.7 ± 4.3) mg/L vs.(3.6 ± 3.0) mg/L,P =0.001].The GDM group had a larger pre-pregnancy body mass index [(22.6 ± 2.9) kg/m2] than that in IGT group [(21.3 ± 2.7) kg/m2] (P =0.049) and NGT group [(21.2 ±2.8) kg/m2] (P =0.003).In the order from NGT to IGT to GDM group,the hemoglobin A1c [(5.2 ± 0.3) ％ vs.(5.3 ± 0.3) ％ vs.(5.4 ± 0.3) ％,P =0.001,P =0.007],the areas under curve of glucose [(20.4±2.0) mmol · h/L vs.(22.9 ± 1.5) mmol · h/L vs.(26.9 ±2.1) mmol · h/L,both P=0.001] and the areas under curve of insulin [(1.7 ±0.9) × 103 pmol · h/L vs.(2.1 ± 1.1) × 103 pmol · h/L vs.(2.7±1.3) ×103 pmol · h/L,P=0.001,P=0.007] increased gradually,while insulin sensitivity index (88.1 ± 52.1 vs.80.0 ± 30.6 vs.50.0 ± 24.1,P =0.001,P =0.014) and insulin secretion-sensitivity index (134 507.0 ± 43 291.0 vs.102 542.0 ± 15 291.0 vs.77 582.0 ± 20 764.0,both P =0.001) decreased gradually.The insulin resistance index in the GDM group (3.3 ± 2.2) was significantly higher than that in IGT (2.2 ± 1.0) and NGT groups (3.0 ± 1.1) (both P =0.001).The function of β-cell,first-and second-phase insulin secretion were not significantly different among the 3 groups.Compared with the NGT group,pregnant women with GDM had shorter gestational age [(38.8 ± 1.1) weeks vs.(39.4 ± 1.1) weeks,P=0.004] and higher incidence of adverse pregnancy outcomes (44.6％ vs.21.8％,P =0.001).Seven risk factors predicting adverse pregnancy outcomes in women with GDM were identified,including pre-pregnancy body mass index (P=0.017),0-,1-,and 2-hour blood glucose in 100 g OGTT (P=0.036,P=0.009,P=0.004),3-hour insulin (P =0.014),and hemoglobin A1 c (P =0.002) and C-reactive protein (P =0.005) in second trimester,among which 1-hour blood glucose displayed the highest coefficient (OR =2.767).Conclusions Pregnant women with GDM have elevated blood pressure,dyslipidemia and increased inflammatory cytokine C-reactive protein.Women with GDM and IGT both show insulin resistance and β-cell dysfunction,and these impairments are more severe in women with GDM.Higher pre-pregnancy body mass index and blood glucose levels during pregnancy are associated with adverse pregnancy outcomes in women with GDM.

Objective To investigate the application value and quality control of breast cancer cells PR,ER C-erbB-2,P53,Ki67 expressions in the patients with breast cancer.Methods The specimens were obtained by the fine needle aspiration cytological smear or intraoperative imprint cytology.The biological expressions of ER,PR,C-erbB-2,P53,Ki67 were detected by the immuno-cytochemical staining,the detection results with those detected by the immunohistochemical staining were performed the compara-tive analysis.Results The biological expressions of ER,PR,C-erbB-2,P53,Ki67 in 53 cases of breast cancer were 73.56%, 58.49%,56.60%,68.63%,81.13% respectively;ER,PR,C-erbB-2,P53,Ki67 had no statistical significant differences in positive cases and positive intensity between the immunocytochemical staining and the immunohistochemical staining (P >0.05).Conclusion The immunocytochemical staining can replace the immunohistochemical staining and has the important significance in the preop-erative diagnosis of breast cancer,therapeutical scheme selection and prognosis judgment.The whole process quality control is the key to do the breast cancer immunocytochemical staining well.

Aim To investigate the protective effects of total triterpenoid from Prunella vulgaris L. ( TTP) on CCl4-induced hepatic fibrosis in rats and its mecha-nism. Methods Rat liver fibrosis was induced by 50% CCl4 twice a week for 12 weeks. From the 5th week, all the therapeutic groups were treated with the TTP(25, 50, 100 mg·kg-1 ) and the colchicine (0. 1 mg· kg-1 ) respectively once a day for 8 weeks. At the end of the twelfth week, the levels of ALT, AST, HA, PCⅢ, CⅣ, MDA, SOD, GSH-Px, Hyp were measured . HE and Masson staining were used to evalu-late the degree of hepatic fibrosis. The mRNA expres-sion ofα-SMA, procollagen I, Smad2, Smad3, Smad7 in liver was detected by RT-PCR, and the p-ERK pro-tein expression was evaluated by Western blot. Results Compared with the model group, TTP(25, 50, 100 mg·kg-1 ) not only reduced serum content of ALT, AST, HA, PCⅢ, CⅣand Hyp, MDA in liver tissue, improved the morphologic changes of hepatic fibrosis, but also increased SOD and GSH-Px activity. Moreo-ver, it decreased the α-SMA, procollagen I, Smad2, Smad3 mRNA expression and increased Smad7 mRNA expression in liver tissues obviously. Furthermore, TTP reduced the protein expression of p-ERK. Conclusions TTP can protect rats from CCl4-induced liver fibro-sis. The mechanism of this process may involve inhibi-ting the expression of p-ERK and interference with TGF-β1/Smad signal transduction pathway.