Objective To explore the role of glutamate in inducing cortical neuron damage in newborn rats.Methods The model of damage induced by glutamate was established on cultured cortical neurons in newborn rats with primary cultivation technique.To evaluate the severity of neuron injury, the changes of morphology were observed by inverted microscopy, the cell viability and rate of LDH releasing from neuron were detected by MTT assay and biochemical method,respectively;the rate of neuronal apoptosis was measured by flow cytometer system.Results Under the inverted microscopy, neurons showed obvious toxic damage in glutamate treatment group. Compared with controls,the cell viability significantly decreased (t=4.58 P

BACKGROUNDPathological fractures signify a potentially more aggressive subset of the original disease with higher misdiagnosis rates and inferior oncologic results. The purpose of the present study was to explore the clinical features of neoplastic pathological fracture in extremities.

METHODSFrom August 2002 to December 2010, a consecutive series of 139 patients suffering neoplastic pathological fracture were recruited, including 79 males and 60 females with a mean age of 31.3 years. Fractures were classified into five groups: tumor-like lesions (55), benign bone tumors (13), giant cell tumors (7), primary malignant bone tumors (28), and metastatic bone tumors (36). Based on their inducing forces, pathologic fractures were classified into four grades: spontaneous fracture, functional fracture, minor injury, and traumatic injury. Patients' age, fracture site, histological diagnoses, fracture forces, prodromes, and misdiagnosis were well reviewed. Kruskal-Wallis and χ(2) tests were used to compare forces and prodromes within different types of bone tumors.

RESULTSThe highest pathologic fracture morbidity was 32.3% (45/139), which lay in the 11 - 20 year group, and 86.1% of metastatic tumors occurred in the 50 - 80 year group. The common sites of fractures were femur, humerus, and tibia. The fracture forces in benign bone tumors and tumor-like lesions are the strongest, followed by metastatic tumors and primary malignant bone tumors (H(C) = 80.980, P = 0.000). Sixty-seven patients (48.2%) had local prodromes before pathologic fracture. The incidence rates of prodromes between primary malignant tumors and metastatic bone tumors had no significant difference (P = 0.146), but they were all obviously higher than that of benign bone tumors and tumor-like lesions. Twenty patients experienced misdiagnosis.

CONCLUSIONMinor injury forces and local prodromes are clinical features of neoplastic pathologic fractures and they are also the critical factor avoiding misdiagnoses.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bone Neoplasms ; complications ; pathology ; Child ; Child, Preschool ; Diagnostic Errors ; Female ; Fractures, Spontaneous ; diagnosis ; Humans ; Male ; Middle Aged

The experiment's aim was to optimize the processing technology of Xanthii Fructus which through comparing the difference of UPLC fingerprint and contents of toxicity ingredient in water extract of 16 batches of processed sample. The determination condition of UPLC chromatographic and contents of toxicity ingredient were as follows. UPLC chromatographic: ACQUITY BEH C18 column (2.1 mm x 100 mm, 1.7 microm) eluted with the mobile phases of acetonitrile and 0.1% phosphoric acidwater in gradient mode, the flow rate was 0.25 mL x min(-1) and the detection wavelength was set at 327 nm. Contents of toxicity ingredient: Agilent TC-C18 column (4.6 mm x 250 mm, 5 microm), mobile phase was methanol-0.01 mol x L(-1) sodium dihydrogen phosphate (35: 65), flow rate was 1.0 mL x min(-1), and detection wavelength was 203 nm. The chromatographic fingerprints 16 batches of samples were analyzed in using the similarity evaluation system of chromatographic, fingerprint of traditional Chinese medicine, SPSS16.0 and SIMCA13.0 software, respectively. The similarity degrees of the 16 batches samples were more than 0.97, all the samples were classified into four categories, and the PCA showed that the peak area of chlorogenic acid, 3,5-dicaffeoylquinic acid and caffeic acid were significantly effect index in fingerprint of processed Xanthii Fructus sample. The outcome of determination showed that the toxicity ingredient contents of all samples reduced significantly after processing. This method can be used in optimizing the processing technology of Xanthii Fructus.
Caffeic Acids ; analysis ; toxicity ; Chemistry, Pharmaceutical ; Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; analysis ; toxicity ; Quinic Acid ; analogs & derivatives ; analysis ; toxicity ; Xanthium ; chemistry ; classification

Objective To study the exact function of human gene 5 transactivated by pre-S1 protein of hepatitis B virus(PS1TP5)by investigating the gene expression of PS1TP5 in yeast cells. Methods Reverse transcription-polymerase chain reaction(RT-PCR)was performed to amplify the gene of PS1TP5 using the mRNA of HepG2 cells as template and the gene was cloned into pGEM-T vector.The gene of PS1TP5 was cut from pGEM-T-PS1TP5 vector and cloned into yeast expressive plasmid pGBKT7,then pGBKT7-PS1TP5 was transformed into yeast cell AH109.The yeast protein was isolated and analyzed with sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) and Western hybridization.Results PS1TP5 gene was successfully amplified and identified by DNA sequencing.The digested fragment was cloned into pGBKT7 vector and transformed into yeast cell AH109.The results of SDS-PAGE and Western assay showed that the relative molecular weight of the expressed product was about 36 950,and PS1TP5 protein existed in yeast cells.Conclusion The findings suggest that PS1TP5 can be successfully expressed in yeast cell.

OBJECTIVEFunctional defects in NK cells have been proposed to be responsible for the impairment of anti-tumor immune responses. However, it remained unclear whether the function of NK cells were impaired in patients with hepatocellular carcinoma. To address this issue, we analyzed the frequency and function of peripheral NK cell subsets in hepatocellular carcinoma (HCC) patients.

METHODS35 HCC patients and 24 healthy controls (HC) were enrolled in the study. Peripheral NK frequency was analyzed using flow cytometry. In addition, the capacity of NK cells to produce IFN gamma and to lyse K562 cells was evaluated.

RESULTSIn contrast with the healthy controls, the frequency of peripheral NK cells in hepatocellular carcinoma patients was decreased (12.19%+/-10.85% vs 24.01%+/-8.78%, u = 4.01, probability value less than 0.01), while the frequency of CD56(bright)CD16(neg) NK cells was increased (0.62%+/-0.39% vs 0.48%+/-0.28%, u = 1.96, probability value less than 0.05), and the frequency of CD56(dim)CD16(pos) NK cells was significantly decreased (11.59%+/-7.49% vs 22.66%+/-8.84%, u = 3.92, probability value less than 0.01). In addition, peripheral NK cells from HCC patients exhibited decreased capacity to produce IFN gamma (effective cells 13.31%) and to lyse K562 cells (mixed ratio 30:1, 10:1, 1:1, effective cells 16.72%+/-7.33% vs 26.29%+/-12.36%, u = 2.52, P less than 0.05, 8.01%+/-4.40% vs 13.09%+/-5.03%, u = 3.32, probability value less than 0.05, 3.51%+/-2.82% vs 3.42%+/-1.64%, u = 1.56, probability value more than 0.05, respectively) as compared with healthy subjects.

CONCLUSIONAnti-tumor activity of NK cells in HCC patients was impaired.

Adult ; CD56 Antigen ; immunology ; Carcinoma, Hepatocellular ; immunology ; Case-Control Studies ; Cytotoxicity Tests, Immunologic ; Cytotoxicity, Immunologic ; Female ; Flow Cytometry ; Humans ; Interferon-gamma ; metabolism ; K562 Cells ; Killer Cells, Natural ; immunology ; Liver Neoplasms ; immunology ; Lymphocyte Subsets ; immunology ; Male ; Middle Aged ; Receptors, IgG ; immunology

Derris eriocarpa, a traditional Chinese medicine belonging to the family of Leguminosae, is widely distributed mainly over Yunnan, Guangxi and Guizhou of China. Modern pharmacological researches on this herb showed that it had extensive bioactivities, such as promoting urination, removing dampness and cough and reducing inspissated mucus and other biological activities. The extensive studies on the chemical constituents of this plant have resulted in the isolation of triterpenoids, steroids, fatty acid and others, but the flavone compounds haven't reported before. In our further research on the ethyl acetate of this plant, nine flavone compounds were obtained by column chromatography on silica gel, Sephadex LH-20, semi-prep HPLC, polyamide column chromatography and recrystallization for separation and purification. The structures were determined on the basis of extensive spectroscopic analysis, including MS, NMR experiments and comparison with spectroscopic data in the literature, respectively, as diosmetin (1), 3, 3'-di-O-methylquercetin (2), afromosin (3), 6, 3'-dihydroxy-7, 4'-dimethoxyisoflavone (4), odoratin (5), 7, 3'-dihydroxy-8, 4'-dimethoxyisoflavone (6), 6, 4'-dihydroxy-7, 3'-dimethoxyisoflavone (7), 5, 7, 4'-trihydroxy-3, 3', 5'-trimethoxyflavone (8), and alpinumisoflavone (9). All these compounds were isolated from Derris eriocarpa How for the first time. And the in vitro assays showed that compound 2 possessed moderate inhibitory activity against human cancer cells K562 and HEL.
Derris ; chemistry ; Flavonoids ; chemistry ; isolation & purification ; pharmacology ; Humans ; K562 Cells

OBJECTIVETo evaluate whether garlicin can prevent reperfusion no-reflow in a catheter-based porcine model of acute myocardial infarction (AMI).

METHODSTwenty-two male Chinese mini swines were randomized into 3 groups: sham-operation group (n=6), control group (n=8), and garlicin group (n=8). The distal part of left anterior descending coronary artery (LAD) in swines of the latter two groups was completely occluded by dilated balloon for 2 h and a successful AMI model was confirmed by coronary angiography (CAG) and electrocardiograph (ECG), which was then reperfused for 3 h. In the sham-operation group, balloon was placed in LAD without dilatation. Garlicin at a dosage of 1.88 mg/kg was injected 10 min before LAD occlusion until reperfusion for 1 h in the garlicin group. To assess serial cardiac function, hemodynamic data were examined by catheter method before AMI, 2 h after occlusion and 1, 2, and 3 h after reperfusion. Myocardial contrast echocardiography (MCE) and double staining with Evans blue and thioflavin-S were performed to evaluate myocardial no-reflow area (NRA) and risk area (RA).

RESULTSLeft ventricular systolic pressure and left ventricular end-diastolic pressure significantly improved in the garlicin group after reperfusion compared with the control group P<0.05) and 2 h after AMI (P<0.05). MCE showed garlicin decreased reperfusion NRA after AMI compared with the control group (P <0.05). In double staining, NRA/RA in the garlicin group was 18.78%, significantly lower than that of the control group (49.84%, P<0.01).

CONCLUSIONSGarlicin has a preventive effect on the porcine model of myocardial infarction reperfusion no-reflow by improving hemodynamics and decreasing NRA.

Allyl Compounds ; pharmacology ; therapeutic use ; Animals ; Cardiotonic Agents ; pharmacology ; therapeutic use ; Contrast Media ; Disease Models, Animal ; Disulfides ; pharmacology ; therapeutic use ; Hemodynamics ; drug effects ; Male ; Myocardial Infarction ; complications ; diagnostic imaging ; drug therapy ; pathology ; Myocardial Reperfusion ; No-Reflow Phenomenon ; complications ; diagnostic imaging ; drug therapy ; pathology ; Swine ; Swine, Miniature ; Thiazoles ; metabolism ; Ultrasonography

BACKGROUND: Few studies investigated serum uric acid levels in patients with acute ST-elevation myocardial infarction (STEMI). The study was to assess the clinical value of serum uric acid levels in patients with acute ST-elevation myocardial infarction (STEMI). METHODS: Totally 502 consecutive patients with STEMI were retrospectively studied from January 2005 to December 2010. The level of serum lipid, echocardiographic data and in-hospital major adverse cardiovascular events (MACE) in patients with hyperuricemia (n=119) were compared with those in patients without hyperuricemia (n=383). The relationship between the level of serum uric acid and the degree of diseased coronary artery was analyzed. All data were analyzed with SPSS version 17.0 software for Student's t test, the Chi-square test and Pearson's correlation coefficient analysis. RESULTS: Serum uric acid level was positively correlated with serum triglyceride level. Hyperlipidemia was more common in hyperuricemia patients than in non-hyperuricemia patients (43.7％ vs. 33.7％, P=0.047), and serum triglyceride level was significantly higher in hyperuricemia patients (2.11±1.24 vs. 1.78±1.38, P=0.014). But no significant association was observed between serum uric acid level and one or more diseased vessels (P>0.05). Left ventricular end-diastolic diameter (LVEDd) was larger in hyperuricemia patients than in non-hyperuricemia patients (53.52±6.19 vs. 52.18±4.89, P=0.041). The higher rate of left systolic dysfunction and diastolic dysfunction was discovered in hyperuricemia patients (36.4％ vs. 15.1％, P<0.001; 68.2％ vs. 55.8％, P=0.023). Also, hyperuricemia patients were more likely to have in-hospital MACE (P<0.05). CONCLUSIONS: Serum uric acid level is positively correlated with serum triglyceride level, but not with the severity of coronary artery disease. Hyperuricemia patients with STEMI tend to have a higher rate of left systolic dysfunction and diastolic dysfunction and more likely to have more in-hospital MACE.

OBJECTIVE: investigate and compare the effect of valsartan and indapamide on inflammatory cytokines in hypertension. METHODS: Forty-one untreated patients with mild to moderate hypertension and 20 age and sex-matched normotensives were enrolled in this study. Hypertensives were treated with indapamide 1.5 mg/d (n=20) or valsartan 80 mg/d (n=21) for 4 weeks, and blood samples for determining monocyte chemotactic protein-1 (MCP-1), macrophage inflammatory protein-1 (MIP-1alpha), sP-selectin, asymmetric dimethylarginin (ADMA), angiotensin II (Ang II), and 6-keto-PGF1alpha were collected before the treatment and 4 weeks after the treatment. RESULTS: Hypertensives exhibited significantly higher blood pressure, as well as elevated plasma levels of MCP-1, MIP-1alpha, sP-selectin and serum level of ADMA compared with the normotensives. Nevertheless, there was no significant difference in serum 6-keto-PGF1alpha and Ang II between the hypertensives and the normotensives. After the treatment with indapamide or valsartan for 4 weeks, both the systolic and diastolic blood pressures, though still higher than those of the normotensives, decreased markedly. After the treatment with indapamide for 4 weeks, MCP-1, MIP-1alpha and sP-selectin slightly decreased, but not statistically significant (P>0.05). Those cytokines decreased significantly after being treated with valsartan for 4 weeks [(19.16+/-3.11) pg/mL vs (16.08+/-2.67) pg/mL, P<0.05; (27.74+/-8.36) pg/mL vs (17.64+/-7.59) pg/mL, P<0.05; (2.67+/-3.18) pg/mL vs (6.15+/-2.94) pg/mL, P<0.01]. In the 2 treatment groups, 6-keto-PGF1alpha markedly increased [(61.96+/-20.81) pg/mL vs (96.72+/-25.89) pg/mL, P<0.05; (63.25+/-16.92) pg/mL vs (143.22+/-43.45) pg/mL, P<0.01]; ADMA decreased significantly [(1.35+/-0.74) pg/mL vs (0.98+/-0.56) micromol/L, P<0.05; (1.31+/-0.68) pg/mL vs (0.71+/-0.52) micromol/L, P<0.01]. Though Ang II slightly increased, no statistical significance was found (P>0.05). CONCLUSION The levels of MCP-1, MIP-1alpha, sP-selectin and ADMA were elevated in mild to moderate hypertensives. Valsartan and indapamide have similar blood pressure lowering effect. Valasartan exerts more significant effect on cytokines than indapamide does.
Adult ; Angiotensin II Type 1 Receptor Blockers ; therapeutic use ; Antihypertensive Agents ; therapeutic use ; Chemokine CCL2 ; blood ; Chemokine CCL3 ; Chemokine CCL4 ; Cytokines ; blood ; Diuretics ; therapeutic use ; Female ; Humans ; Hypertension ; blood ; drug therapy ; Indapamide ; therapeutic use ; Macrophage Inflammatory Proteins ; blood ; Male ; Middle Aged ; P-Selectin ; blood ; Tetrazoles ; therapeutic use ; Valine ; analogs & derivatives ; therapeutic use ; Valsartan

Objective To introduce an efficient method for culturing and purifying Schwann cells (SCs) in vitro. Methods Sciatic nerves were harvested from neonatal SD rats and the epineuria were removed. Single enzyme digestion combined with explans and double enzyme digestion were employed, respectively, to digest the nerve tissues following trituration. The proliferation of SCs and degree of purification were evaluated by viable count method and the combination of S-100 labeled monoclonal antibody and SCs. Results Proximally 3.5 × 106 cells were harvested with 96% survival rate and a purity of Schwann cells over 94% by single enzyme digestion combined with explans, however only 3.0×106 cells were gained with the purity being 90% and survival rate being 92% by double enzyme digestion. Conclusion This method yields large amount of viable Schwann cells with high purity and survival rate.